./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-commit-1.wvr-bad.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_cdb4760c-cd4d-4a65-b1b9-4ccd46c12a2c/bin/uautomizer-verify-84ZbGMXZE1/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdb4760c-cd4d-4a65-b1b9-4ccd46c12a2c/bin/uautomizer-verify-84ZbGMXZE1/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdb4760c-cd4d-4a65-b1b9-4ccd46c12a2c/bin/uautomizer-verify-84ZbGMXZE1/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdb4760c-cd4d-4a65-b1b9-4ccd46c12a2c/bin/uautomizer-verify-84ZbGMXZE1/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-commit-1.wvr-bad.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdb4760c-cd4d-4a65-b1b9-4ccd46c12a2c/bin/uautomizer-verify-84ZbGMXZE1/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdb4760c-cd4d-4a65-b1b9-4ccd46c12a2c/bin/uautomizer-verify-84ZbGMXZE1 --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 83c7202603a0719c5812e4d7043f4665de4d954c89c656bd6312ac9e8fdcb494 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-12-02 12:48:51,950 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-12-02 12:48:52,008 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdb4760c-cd4d-4a65-b1b9-4ccd46c12a2c/bin/uautomizer-verify-84ZbGMXZE1/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-12-02 12:48:52,012 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-12-02 12:48:52,013 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-12-02 12:48:52,034 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-12-02 12:48:52,035 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-12-02 12:48:52,035 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-12-02 12:48:52,035 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-12-02 12:48:52,035 INFO L153 SettingsManager]: * Use memory slicer=true [2024-12-02 12:48:52,035 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-12-02 12:48:52,036 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-12-02 12:48:52,036 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-12-02 12:48:52,036 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-12-02 12:48:52,036 INFO L153 SettingsManager]: * Use SBE=true [2024-12-02 12:48:52,036 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-12-02 12:48:52,036 INFO L153 SettingsManager]: * sizeof long=4 [2024-12-02 12:48:52,036 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-12-02 12:48:52,036 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-12-02 12:48:52,037 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-12-02 12:48:52,037 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-12-02 12:48:52,037 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-12-02 12:48:52,037 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-12-02 12:48:52,037 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-12-02 12:48:52,037 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-12-02 12:48:52,037 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-12-02 12:48:52,037 INFO L153 SettingsManager]: * sizeof long double=12 [2024-12-02 12:48:52,037 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-12-02 12:48:52,037 INFO L153 SettingsManager]: * Use constant arrays=true [2024-12-02 12:48:52,037 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-12-02 12:48:52,037 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-02 12:48:52,037 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-02 12:48:52,038 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-02 12:48:52,038 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 12:48:52,038 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-12-02 12:48:52,038 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-02 12:48:52,038 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-02 12:48:52,038 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-02 12:48:52,038 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 12:48:52,038 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-12-02 12:48:52,038 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-12-02 12:48:52,038 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-12-02 12:48:52,038 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-12-02 12:48:52,038 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-12-02 12:48:52,039 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-12-02 12:48:52,039 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-12-02 12:48:52,039 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-12-02 12:48:52,039 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_cdb4760c-cd4d-4a65-b1b9-4ccd46c12a2c/bin/uautomizer-verify-84ZbGMXZE1 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 -> 83c7202603a0719c5812e4d7043f4665de4d954c89c656bd6312ac9e8fdcb494 [2024-12-02 12:48:52,281 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-12-02 12:48:52,289 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-12-02 12:48:52,291 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-12-02 12:48:52,292 INFO L270 PluginConnector]: Initializing CDTParser... [2024-12-02 12:48:52,292 INFO L274 PluginConnector]: CDTParser initialized [2024-12-02 12:48:52,294 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdb4760c-cd4d-4a65-b1b9-4ccd46c12a2c/bin/uautomizer-verify-84ZbGMXZE1/../../sv-benchmarks/c/weaver/popl20-bad-commit-1.wvr-bad.c [2024-12-02 12:48:55,021 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdb4760c-cd4d-4a65-b1b9-4ccd46c12a2c/bin/uautomizer-verify-84ZbGMXZE1/data/82a723799/32848be3342d4e04828be84a51d2e05f/FLAG74d1be2f7 [2024-12-02 12:48:55,204 INFO L384 CDTParser]: Found 1 translation units. [2024-12-02 12:48:55,204 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdb4760c-cd4d-4a65-b1b9-4ccd46c12a2c/sv-benchmarks/c/weaver/popl20-bad-commit-1.wvr-bad.c [2024-12-02 12:48:55,210 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdb4760c-cd4d-4a65-b1b9-4ccd46c12a2c/bin/uautomizer-verify-84ZbGMXZE1/data/82a723799/32848be3342d4e04828be84a51d2e05f/FLAG74d1be2f7 [2024-12-02 12:48:55,223 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdb4760c-cd4d-4a65-b1b9-4ccd46c12a2c/bin/uautomizer-verify-84ZbGMXZE1/data/82a723799/32848be3342d4e04828be84a51d2e05f [2024-12-02 12:48:55,225 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-12-02 12:48:55,226 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-12-02 12:48:55,227 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-12-02 12:48:55,227 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-12-02 12:48:55,231 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-12-02 12:48:55,231 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 12:48:55" (1/1) ... [2024-12-02 12:48:55,232 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f234b12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:48:55, skipping insertion in model container [2024-12-02 12:48:55,232 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 12:48:55" (1/1) ... [2024-12-02 12:48:55,246 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-12-02 12:48:55,392 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-12-02 12:48:55,394 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-02 12:48:55,403 INFO L200 MainTranslator]: Completed pre-run [2024-12-02 12:48:55,432 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-02 12:48:55,446 INFO L204 MainTranslator]: Completed translation [2024-12-02 12:48:55,447 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:48:55 WrapperNode [2024-12-02 12:48:55,447 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-12-02 12:48:55,448 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-12-02 12:48:55,448 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-12-02 12:48:55,448 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-12-02 12:48:55,453 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:48:55" (1/1) ... [2024-12-02 12:48:55,461 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:48:55" (1/1) ... [2024-12-02 12:48:55,490 INFO L138 Inliner]: procedures = 24, calls = 54, calls flagged for inlining = 21, calls inlined = 25, statements flattened = 333 [2024-12-02 12:48:55,490 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-12-02 12:48:55,491 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-12-02 12:48:55,491 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-12-02 12:48:55,491 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-12-02 12:48:55,499 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:48:55" (1/1) ... [2024-12-02 12:48:55,499 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:48:55" (1/1) ... [2024-12-02 12:48:55,502 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:48:55" (1/1) ... [2024-12-02 12:48:55,521 INFO L175 MemorySlicer]: Split 13 memory accesses to 2 slices as follows [2, 11]. 85 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2024-12-02 12:48:55,521 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:48:55" (1/1) ... [2024-12-02 12:48:55,521 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:48:55" (1/1) ... [2024-12-02 12:48:55,532 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:48:55" (1/1) ... [2024-12-02 12:48:55,533 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:48:55" (1/1) ... [2024-12-02 12:48:55,538 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:48:55" (1/1) ... [2024-12-02 12:48:55,539 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:48:55" (1/1) ... [2024-12-02 12:48:55,541 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:48:55" (1/1) ... [2024-12-02 12:48:55,544 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-12-02 12:48:55,545 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-12-02 12:48:55,545 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-12-02 12:48:55,545 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-12-02 12:48:55,546 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:48:55" (1/1) ... [2024-12-02 12:48:55,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 12:48:55,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdb4760c-cd4d-4a65-b1b9-4ccd46c12a2c/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:48:55,576 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdb4760c-cd4d-4a65-b1b9-4ccd46c12a2c/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-12-02 12:48:55,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdb4760c-cd4d-4a65-b1b9-4ccd46c12a2c/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-12-02 12:48:55,601 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-12-02 12:48:55,601 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-12-02 12:48:55,601 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-12-02 12:48:55,601 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-12-02 12:48:55,601 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-12-02 12:48:55,601 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-12-02 12:48:55,601 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-12-02 12:48:55,601 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-12-02 12:48:55,601 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-12-02 12:48:55,601 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-12-02 12:48:55,601 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-12-02 12:48:55,602 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-12-02 12:48:55,602 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-12-02 12:48:55,602 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-12-02 12:48:55,602 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-12-02 12:48:55,602 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-12-02 12:48:55,602 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-12-02 12:48:55,602 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-12-02 12:48:55,604 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-12-02 12:48:55,701 INFO L234 CfgBuilder]: Building ICFG [2024-12-02 12:48:55,703 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-12-02 12:48:56,178 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-12-02 12:48:56,178 INFO L283 CfgBuilder]: Performing block encoding [2024-12-02 12:48:56,597 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-12-02 12:48:56,597 INFO L312 CfgBuilder]: Removed 6 assume(true) statements. [2024-12-02 12:48:56,598 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 12:48:56 BoogieIcfgContainer [2024-12-02 12:48:56,598 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-12-02 12:48:56,600 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-12-02 12:48:56,600 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-12-02 12:48:56,604 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-12-02 12:48:56,604 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 12:48:55" (1/3) ... [2024-12-02 12:48:56,604 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2febd9c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 12:48:56, skipping insertion in model container [2024-12-02 12:48:56,604 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:48:55" (2/3) ... [2024-12-02 12:48:56,605 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2febd9c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 12:48:56, skipping insertion in model container [2024-12-02 12:48:56,605 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 12:48:56" (3/3) ... [2024-12-02 12:48:56,606 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-bad-commit-1.wvr-bad.c [2024-12-02 12:48:56,618 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-12-02 12:48:56,619 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-bad-commit-1.wvr-bad.c that has 4 procedures, 72 locations, 1 initial locations, 6 loop locations, and 24 error locations. [2024-12-02 12:48:56,619 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-12-02 12:48:56,686 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-12-02 12:48:56,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 81 places, 88 transitions, 197 flow [2024-12-02 12:48:56,755 INFO L124 PetriNetUnfolderBase]: 17/85 cut-off events. [2024-12-02 12:48:56,757 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-12-02 12:48:56,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98 conditions, 85 events. 17/85 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 243 event pairs, 0 based on Foata normal form. 0/44 useless extension candidates. Maximal degree in co-relation 64. Up to 6 conditions per place. [2024-12-02 12:48:56,761 INFO L82 GeneralOperation]: Start removeDead. Operand has 81 places, 88 transitions, 197 flow [2024-12-02 12:48:56,764 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 77 places, 84 transitions, 186 flow [2024-12-02 12:48:56,771 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-12-02 12:48:56,782 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;@6e724307, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-12-02 12:48:56,782 INFO L334 AbstractCegarLoop]: Starting to check reachability of 43 error locations. [2024-12-02 12:48:56,785 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-12-02 12:48:56,785 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-12-02 12:48:56,785 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-12-02 12:48:56,785 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 12:48:56,786 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-12-02 12:48:56,786 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-12-02 12:48:56,790 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:48:56,790 INFO L85 PathProgramCache]: Analyzing trace with hash 1044581, now seen corresponding path program 1 times [2024-12-02 12:48:56,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:48:56,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698530730] [2024-12-02 12:48:56,797 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:48:56,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:48:56,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:48:57,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:48:57,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:48:57,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698530730] [2024-12-02 12:48:57,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698530730] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 12:48:57,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 12:48:57,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-12-02 12:48:57,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71375307] [2024-12-02 12:48:57,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 12:48:57,021 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 12:48:57,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:48:57,042 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 12:48:57,042 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 12:48:57,061 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 88 [2024-12-02 12:48:57,063 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 84 transitions, 186 flow. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:48:57,063 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 12:48:57,063 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 88 [2024-12-02 12:48:57,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 12:48:58,379 INFO L124 PetriNetUnfolderBase]: 7269/10578 cut-off events. [2024-12-02 12:48:58,380 INFO L125 PetriNetUnfolderBase]: For 354/354 co-relation queries the response was YES. [2024-12-02 12:48:58,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20394 conditions, 10578 events. 7269/10578 cut-off events. For 354/354 co-relation queries the response was YES. Maximal size of possible extension queue 1009. Compared 70300 event pairs, 5236 based on Foata normal form. 1/5672 useless extension candidates. Maximal degree in co-relation 19706. Up to 9450 conditions per place. [2024-12-02 12:48:58,465 INFO L140 encePairwiseOnDemand]: 79/88 looper letters, 54 selfloop transitions, 2 changer transitions 0/76 dead transitions. [2024-12-02 12:48:58,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 76 transitions, 282 flow [2024-12-02 12:48:58,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 12:48:58,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-12-02 12:48:58,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 135 transitions. [2024-12-02 12:48:58,479 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5113636363636364 [2024-12-02 12:48:58,481 INFO L175 Difference]: Start difference. First operand has 77 places, 84 transitions, 186 flow. Second operand 3 states and 135 transitions. [2024-12-02 12:48:58,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 76 transitions, 282 flow [2024-12-02 12:48:58,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 76 transitions, 270 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-12-02 12:48:58,498 INFO L231 Difference]: Finished difference. Result has 68 places, 76 transitions, 162 flow [2024-12-02 12:48:58,501 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=162, PETRI_PLACES=68, PETRI_TRANSITIONS=76} [2024-12-02 12:48:58,504 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, -9 predicate places. [2024-12-02 12:48:58,504 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 76 transitions, 162 flow [2024-12-02 12:48:58,505 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:48:58,505 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 12:48:58,505 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-12-02 12:48:58,505 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-12-02 12:48:58,505 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-12-02 12:48:58,506 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:48:58,506 INFO L85 PathProgramCache]: Analyzing trace with hash 1044582, now seen corresponding path program 1 times [2024-12-02 12:48:58,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:48:58,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435146516] [2024-12-02 12:48:58,506 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:48:58,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:48:58,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:48:58,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:48:58,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:48:58,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435146516] [2024-12-02 12:48:58,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435146516] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 12:48:58,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 12:48:58,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 12:48:58,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999035090] [2024-12-02 12:48:58,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 12:48:58,805 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 12:48:58,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:48:58,805 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 12:48:58,805 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 12:48:58,825 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 88 [2024-12-02 12:48:58,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 76 transitions, 162 flow. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:48:58,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 12:48:58,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 88 [2024-12-02 12:48:58,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 12:49:00,017 INFO L124 PetriNetUnfolderBase]: 7269/10575 cut-off events. [2024-12-02 12:49:00,017 INFO L125 PetriNetUnfolderBase]: For 73/73 co-relation queries the response was YES. [2024-12-02 12:49:00,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20169 conditions, 10575 events. 7269/10575 cut-off events. For 73/73 co-relation queries the response was YES. Maximal size of possible extension queue 1009. Compared 70240 event pairs, 5236 based on Foata normal form. 0/5669 useless extension candidates. Maximal degree in co-relation 20144. Up to 9450 conditions per place. [2024-12-02 12:49:00,074 INFO L140 encePairwiseOnDemand]: 77/88 looper letters, 48 selfloop transitions, 8 changer transitions 0/73 dead transitions. [2024-12-02 12:49:00,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 73 transitions, 268 flow [2024-12-02 12:49:00,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 12:49:00,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-12-02 12:49:00,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 155 transitions. [2024-12-02 12:49:00,075 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4403409090909091 [2024-12-02 12:49:00,075 INFO L175 Difference]: Start difference. First operand has 68 places, 76 transitions, 162 flow. Second operand 4 states and 155 transitions. [2024-12-02 12:49:00,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 73 transitions, 268 flow [2024-12-02 12:49:00,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 73 transitions, 264 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-12-02 12:49:00,077 INFO L231 Difference]: Finished difference. Result has 66 places, 73 transitions, 168 flow [2024-12-02 12:49:00,078 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=168, PETRI_PLACES=66, PETRI_TRANSITIONS=73} [2024-12-02 12:49:00,078 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, -11 predicate places. [2024-12-02 12:49:00,078 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 73 transitions, 168 flow [2024-12-02 12:49:00,079 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:49:00,079 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 12:49:00,079 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:49:00,079 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-12-02 12:49:00,079 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-12-02 12:49:00,079 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:49:00,079 INFO L85 PathProgramCache]: Analyzing trace with hash -1757299587, now seen corresponding path program 1 times [2024-12-02 12:49:00,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:49:00,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567434380] [2024-12-02 12:49:00,080 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:49:00,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:49:00,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:49:00,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:49:00,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:49:00,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567434380] [2024-12-02 12:49:00,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567434380] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 12:49:00,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 12:49:00,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-12-02 12:49:00,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18052834] [2024-12-02 12:49:00,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 12:49:00,168 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 12:49:00,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:49:00,169 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 12:49:00,169 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 12:49:00,169 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 88 [2024-12-02 12:49:00,169 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 73 transitions, 168 flow. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:49:00,169 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 12:49:00,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 88 [2024-12-02 12:49:00,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 12:49:01,464 INFO L124 PetriNetUnfolderBase]: 12116/17661 cut-off events. [2024-12-02 12:49:01,464 INFO L125 PetriNetUnfolderBase]: For 163/163 co-relation queries the response was YES. [2024-12-02 12:49:01,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33711 conditions, 17661 events. 12116/17661 cut-off events. For 163/163 co-relation queries the response was YES. Maximal size of possible extension queue 1365. Compared 122542 event pairs, 4256 based on Foata normal form. 350/10091 useless extension candidates. Maximal degree in co-relation 33680. Up to 9751 conditions per place. [2024-12-02 12:49:01,518 INFO L140 encePairwiseOnDemand]: 79/88 looper letters, 90 selfloop transitions, 3 changer transitions 0/110 dead transitions. [2024-12-02 12:49:01,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 110 transitions, 432 flow [2024-12-02 12:49:01,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 12:49:01,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-12-02 12:49:01,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 180 transitions. [2024-12-02 12:49:01,521 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6818181818181818 [2024-12-02 12:49:01,521 INFO L175 Difference]: Start difference. First operand has 66 places, 73 transitions, 168 flow. Second operand 3 states and 180 transitions. [2024-12-02 12:49:01,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 110 transitions, 432 flow [2024-12-02 12:49:01,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 110 transitions, 416 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-12-02 12:49:01,524 INFO L231 Difference]: Finished difference. Result has 66 places, 75 transitions, 181 flow [2024-12-02 12:49:01,524 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=181, PETRI_PLACES=66, PETRI_TRANSITIONS=75} [2024-12-02 12:49:01,525 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, -11 predicate places. [2024-12-02 12:49:01,525 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 75 transitions, 181 flow [2024-12-02 12:49:01,525 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:49:01,526 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 12:49:01,526 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:49:01,526 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-12-02 12:49:01,526 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-12-02 12:49:01,526 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:49:01,526 INFO L85 PathProgramCache]: Analyzing trace with hash 1358289779, now seen corresponding path program 1 times [2024-12-02 12:49:01,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:49:01,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431406200] [2024-12-02 12:49:01,527 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:49:01,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:49:01,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:49:01,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:49:01,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:49:01,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431406200] [2024-12-02 12:49:01,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431406200] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 12:49:01,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 12:49:01,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 12:49:01,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540332714] [2024-12-02 12:49:01,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 12:49:01,582 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 12:49:01,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:49:01,582 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 12:49:01,583 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 12:49:01,592 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 88 [2024-12-02 12:49:01,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 75 transitions, 181 flow. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:49:01,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 12:49:01,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 88 [2024-12-02 12:49:01,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 12:49:02,833 INFO L124 PetriNetUnfolderBase]: 15261/21877 cut-off events. [2024-12-02 12:49:02,833 INFO L125 PetriNetUnfolderBase]: For 1277/1301 co-relation queries the response was YES. [2024-12-02 12:49:02,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44986 conditions, 21877 events. 15261/21877 cut-off events. For 1277/1301 co-relation queries the response was YES. Maximal size of possible extension queue 876. Compared 138855 event pairs, 5655 based on Foata normal form. 0/14448 useless extension candidates. Maximal degree in co-relation 10198. Up to 10528 conditions per place. [2024-12-02 12:49:02,910 INFO L140 encePairwiseOnDemand]: 83/88 looper letters, 91 selfloop transitions, 4 changer transitions 0/107 dead transitions. [2024-12-02 12:49:02,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 107 transitions, 443 flow [2024-12-02 12:49:02,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 12:49:02,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-12-02 12:49:02,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 160 transitions. [2024-12-02 12:49:02,912 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6060606060606061 [2024-12-02 12:49:02,912 INFO L175 Difference]: Start difference. First operand has 66 places, 75 transitions, 181 flow. Second operand 3 states and 160 transitions. [2024-12-02 12:49:02,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 107 transitions, 443 flow [2024-12-02 12:49:02,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 107 transitions, 440 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-12-02 12:49:02,915 INFO L231 Difference]: Finished difference. Result has 69 places, 76 transitions, 200 flow [2024-12-02 12:49:02,916 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=200, PETRI_PLACES=69, PETRI_TRANSITIONS=76} [2024-12-02 12:49:02,916 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, -8 predicate places. [2024-12-02 12:49:02,917 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 76 transitions, 200 flow [2024-12-02 12:49:02,917 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:49:02,917 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 12:49:02,917 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:49:02,917 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-12-02 12:49:02,917 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-12-02 12:49:02,918 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:49:02,918 INFO L85 PathProgramCache]: Analyzing trace with hash 1039731882, now seen corresponding path program 1 times [2024-12-02 12:49:02,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:49:02,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78237954] [2024-12-02 12:49:02,918 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:49:02,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:49:02,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:49:03,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:49:03,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:49:03,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78237954] [2024-12-02 12:49:03,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78237954] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 12:49:03,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 12:49:03,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 12:49:03,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351335002] [2024-12-02 12:49:03,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 12:49:03,083 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 12:49:03,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:49:03,083 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 12:49:03,083 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 12:49:03,084 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 88 [2024-12-02 12:49:03,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 76 transitions, 200 flow. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:49:03,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 12:49:03,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 88 [2024-12-02 12:49:03,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 12:49:04,965 INFO L124 PetriNetUnfolderBase]: 19159/28505 cut-off events. [2024-12-02 12:49:04,965 INFO L125 PetriNetUnfolderBase]: For 4681/4845 co-relation queries the response was YES. [2024-12-02 12:49:04,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60737 conditions, 28505 events. 19159/28505 cut-off events. For 4681/4845 co-relation queries the response was YES. Maximal size of possible extension queue 1046. Compared 195569 event pairs, 7868 based on Foata normal form. 477/19441 useless extension candidates. Maximal degree in co-relation 17559. Up to 12927 conditions per place. [2024-12-02 12:49:05,063 INFO L140 encePairwiseOnDemand]: 83/88 looper letters, 96 selfloop transitions, 2 changer transitions 0/116 dead transitions. [2024-12-02 12:49:05,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 116 transitions, 504 flow [2024-12-02 12:49:05,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 12:49:05,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-12-02 12:49:05,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 180 transitions. [2024-12-02 12:49:05,065 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6818181818181818 [2024-12-02 12:49:05,065 INFO L175 Difference]: Start difference. First operand has 69 places, 76 transitions, 200 flow. Second operand 3 states and 180 transitions. [2024-12-02 12:49:05,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 116 transitions, 504 flow [2024-12-02 12:49:05,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 116 transitions, 492 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-12-02 12:49:05,072 INFO L231 Difference]: Finished difference. Result has 70 places, 77 transitions, 208 flow [2024-12-02 12:49:05,072 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=208, PETRI_PLACES=70, PETRI_TRANSITIONS=77} [2024-12-02 12:49:05,073 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, -7 predicate places. [2024-12-02 12:49:05,073 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 77 transitions, 208 flow [2024-12-02 12:49:05,073 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:49:05,073 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 12:49:05,073 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:49:05,073 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-12-02 12:49:05,073 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-12-02 12:49:05,074 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:49:05,074 INFO L85 PathProgramCache]: Analyzing trace with hash -2128047873, now seen corresponding path program 1 times [2024-12-02 12:49:05,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:49:05,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280051855] [2024-12-02 12:49:05,074 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:49:05,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:49:05,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:49:05,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:49:05,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:49:05,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280051855] [2024-12-02 12:49:05,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280051855] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 12:49:05,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 12:49:05,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 12:49:05,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131451151] [2024-12-02 12:49:05,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 12:49:05,127 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 12:49:05,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:49:05,127 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 12:49:05,127 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 12:49:05,136 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 88 [2024-12-02 12:49:05,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 77 transitions, 208 flow. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:49:05,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 12:49:05,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 88 [2024-12-02 12:49:05,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 12:49:06,892 INFO L124 PetriNetUnfolderBase]: 23767/34263 cut-off events. [2024-12-02 12:49:06,892 INFO L125 PetriNetUnfolderBase]: For 4327/4741 co-relation queries the response was YES. [2024-12-02 12:49:06,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73027 conditions, 34263 events. 23767/34263 cut-off events. For 4327/4741 co-relation queries the response was YES. Maximal size of possible extension queue 1488. Compared 225786 event pairs, 11883 based on Foata normal form. 0/23383 useless extension candidates. Maximal degree in co-relation 25449. Up to 20195 conditions per place. [2024-12-02 12:49:07,111 INFO L140 encePairwiseOnDemand]: 83/88 looper letters, 93 selfloop transitions, 4 changer transitions 0/112 dead transitions. [2024-12-02 12:49:07,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 112 transitions, 493 flow [2024-12-02 12:49:07,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 12:49:07,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-12-02 12:49:07,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 168 transitions. [2024-12-02 12:49:07,113 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6363636363636364 [2024-12-02 12:49:07,113 INFO L175 Difference]: Start difference. First operand has 70 places, 77 transitions, 208 flow. Second operand 3 states and 168 transitions. [2024-12-02 12:49:07,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 112 transitions, 493 flow [2024-12-02 12:49:07,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 112 transitions, 491 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-12-02 12:49:07,119 INFO L231 Difference]: Finished difference. Result has 73 places, 77 transitions, 224 flow [2024-12-02 12:49:07,119 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=224, PETRI_PLACES=73, PETRI_TRANSITIONS=77} [2024-12-02 12:49:07,120 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, -4 predicate places. [2024-12-02 12:49:07,120 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 77 transitions, 224 flow [2024-12-02 12:49:07,120 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:49:07,120 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 12:49:07,120 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:49:07,120 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-12-02 12:49:07,120 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-12-02 12:49:07,121 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:49:07,121 INFO L85 PathProgramCache]: Analyzing trace with hash 487673179, now seen corresponding path program 1 times [2024-12-02 12:49:07,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:49:07,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604436091] [2024-12-02 12:49:07,121 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:49:07,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:49:07,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:49:07,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:49:07,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:49:07,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604436091] [2024-12-02 12:49:07,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604436091] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 12:49:07,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 12:49:07,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 12:49:07,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599331045] [2024-12-02 12:49:07,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 12:49:07,245 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 12:49:07,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:49:07,246 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 12:49:07,246 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 12:49:07,255 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 88 [2024-12-02 12:49:07,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 77 transitions, 224 flow. Second operand has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:49:07,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 12:49:07,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 88 [2024-12-02 12:49:07,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 12:49:09,641 INFO L124 PetriNetUnfolderBase]: 21337/31717 cut-off events. [2024-12-02 12:49:09,641 INFO L125 PetriNetUnfolderBase]: For 9783/10485 co-relation queries the response was YES. [2024-12-02 12:49:09,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70146 conditions, 31717 events. 21337/31717 cut-off events. For 9783/10485 co-relation queries the response was YES. Maximal size of possible extension queue 1403. Compared 214056 event pairs, 16426 based on Foata normal form. 112/21798 useless extension candidates. Maximal degree in co-relation 42084. Up to 26815 conditions per place. [2024-12-02 12:49:09,935 INFO L140 encePairwiseOnDemand]: 76/88 looper letters, 87 selfloop transitions, 9 changer transitions 0/115 dead transitions. [2024-12-02 12:49:09,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 115 transitions, 498 flow [2024-12-02 12:49:09,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 12:49:09,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-12-02 12:49:09,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 232 transitions. [2024-12-02 12:49:09,937 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5272727272727272 [2024-12-02 12:49:09,937 INFO L175 Difference]: Start difference. First operand has 73 places, 77 transitions, 224 flow. Second operand 5 states and 232 transitions. [2024-12-02 12:49:09,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 115 transitions, 498 flow [2024-12-02 12:49:09,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 115 transitions, 490 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-12-02 12:49:09,946 INFO L231 Difference]: Finished difference. Result has 78 places, 85 transitions, 288 flow [2024-12-02 12:49:09,946 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=288, PETRI_PLACES=78, PETRI_TRANSITIONS=85} [2024-12-02 12:49:09,947 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 1 predicate places. [2024-12-02 12:49:09,947 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 85 transitions, 288 flow [2024-12-02 12:49:09,947 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:49:09,947 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 12:49:09,947 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:49:09,947 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-12-02 12:49:09,948 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-12-02 12:49:09,948 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:49:09,948 INFO L85 PathProgramCache]: Analyzing trace with hash -2061998497, now seen corresponding path program 1 times [2024-12-02 12:49:09,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:49:09,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352200587] [2024-12-02 12:49:09,948 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:49:09,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:49:09,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:49:09,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:49:09,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:49:09,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352200587] [2024-12-02 12:49:09,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352200587] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 12:49:09,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 12:49:09,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 12:49:09,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185862270] [2024-12-02 12:49:09,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 12:49:09,987 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 12:49:09,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:49:09,987 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 12:49:09,987 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 12:49:09,994 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 88 [2024-12-02 12:49:09,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 85 transitions, 288 flow. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:49:09,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 12:49:09,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 88 [2024-12-02 12:49:09,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 12:49:12,954 INFO L124 PetriNetUnfolderBase]: 37217/53369 cut-off events. [2024-12-02 12:49:12,954 INFO L125 PetriNetUnfolderBase]: For 13027/14211 co-relation queries the response was YES. [2024-12-02 12:49:13,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119813 conditions, 53369 events. 37217/53369 cut-off events. For 13027/14211 co-relation queries the response was YES. Maximal size of possible extension queue 2230. Compared 357507 event pairs, 21948 based on Foata normal form. 0/36562 useless extension candidates. Maximal degree in co-relation 117440. Up to 24963 conditions per place. [2024-12-02 12:49:13,179 INFO L140 encePairwiseOnDemand]: 83/88 looper letters, 101 selfloop transitions, 5 changer transitions 0/122 dead transitions. [2024-12-02 12:49:13,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 122 transitions, 609 flow [2024-12-02 12:49:13,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 12:49:13,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-12-02 12:49:13,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 168 transitions. [2024-12-02 12:49:13,180 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6363636363636364 [2024-12-02 12:49:13,181 INFO L175 Difference]: Start difference. First operand has 78 places, 85 transitions, 288 flow. Second operand 3 states and 168 transitions. [2024-12-02 12:49:13,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 122 transitions, 609 flow [2024-12-02 12:49:13,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 122 transitions, 607 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-12-02 12:49:13,191 INFO L231 Difference]: Finished difference. Result has 81 places, 86 transitions, 312 flow [2024-12-02 12:49:13,191 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=286, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=312, PETRI_PLACES=81, PETRI_TRANSITIONS=86} [2024-12-02 12:49:13,192 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 4 predicate places. [2024-12-02 12:49:13,192 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 86 transitions, 312 flow [2024-12-02 12:49:13,192 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:49:13,192 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 12:49:13,193 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:49:13,193 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-12-02 12:49:13,193 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-12-02 12:49:13,193 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:49:13,193 INFO L85 PathProgramCache]: Analyzing trace with hash 981408421, now seen corresponding path program 1 times [2024-12-02 12:49:13,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:49:13,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269993862] [2024-12-02 12:49:13,193 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:49:13,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:49:13,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:49:13,652 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:49:13,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:49:13,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269993862] [2024-12-02 12:49:13,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269993862] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 12:49:13,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455817598] [2024-12-02 12:49:13,653 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:49:13,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:49:13,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdb4760c-cd4d-4a65-b1b9-4ccd46c12a2c/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:49:13,654 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdb4760c-cd4d-4a65-b1b9-4ccd46c12a2c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:49:13,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdb4760c-cd4d-4a65-b1b9-4ccd46c12a2c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-12-02 12:49:13,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:49:13,746 INFO L256 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-12-02 12:49:13,751 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:49:13,799 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-12-02 12:49:13,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-12-02 12:49:13,876 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-12-02 12:49:13,902 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-12-02 12:49:13,902 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2024-12-02 12:49:13,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-12-02 12:49:13,937 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-12-02 12:49:13,947 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-12-02 12:49:13,947 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-12-02 12:49:14,018 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:49:14,018 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 12:49:14,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455817598] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 12:49:14,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-12-02 12:49:14,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 9 [2024-12-02 12:49:14,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768675334] [2024-12-02 12:49:14,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 12:49:14,019 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-12-02 12:49:14,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:49:14,020 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-12-02 12:49:14,020 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-12-02 12:49:14,049 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 88 [2024-12-02 12:49:14,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 86 transitions, 312 flow. Second operand has 6 states, 6 states have (on average 26.333333333333332) internal successors, (158), 6 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:49:14,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 12:49:14,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 88 [2024-12-02 12:49:14,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 12:49:16,360 INFO L124 PetriNetUnfolderBase]: 18923/28899 cut-off events. [2024-12-02 12:49:16,361 INFO L125 PetriNetUnfolderBase]: For 11963/13211 co-relation queries the response was YES. [2024-12-02 12:49:16,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64365 conditions, 28899 events. 18923/28899 cut-off events. For 11963/13211 co-relation queries the response was YES. Maximal size of possible extension queue 1023. Compared 197566 event pairs, 14916 based on Foata normal form. 1455/22710 useless extension candidates. Maximal degree in co-relation 62224. Up to 25014 conditions per place. [2024-12-02 12:49:16,525 INFO L140 encePairwiseOnDemand]: 78/88 looper letters, 55 selfloop transitions, 3 changer transitions 0/78 dead transitions. [2024-12-02 12:49:16,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 78 transitions, 400 flow [2024-12-02 12:49:16,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 12:49:16,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-12-02 12:49:16,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 152 transitions. [2024-12-02 12:49:16,526 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-12-02 12:49:16,526 INFO L175 Difference]: Start difference. First operand has 81 places, 86 transitions, 312 flow. Second operand 4 states and 152 transitions. [2024-12-02 12:49:16,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 78 transitions, 400 flow [2024-12-02 12:49:16,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 78 transitions, 390 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-12-02 12:49:16,536 INFO L231 Difference]: Finished difference. Result has 74 places, 78 transitions, 280 flow [2024-12-02 12:49:16,536 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=280, PETRI_PLACES=74, PETRI_TRANSITIONS=78} [2024-12-02 12:49:16,537 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, -3 predicate places. [2024-12-02 12:49:16,537 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 78 transitions, 280 flow [2024-12-02 12:49:16,537 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 26.333333333333332) internal successors, (158), 6 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:49:16,537 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 12:49:16,537 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:49:16,544 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdb4760c-cd4d-4a65-b1b9-4ccd46c12a2c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-12-02 12:49:16,738 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdb4760c-cd4d-4a65-b1b9-4ccd46c12a2c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:49:16,738 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-12-02 12:49:16,738 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:49:16,738 INFO L85 PathProgramCache]: Analyzing trace with hash 887355983, now seen corresponding path program 1 times [2024-12-02 12:49:16,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:49:16,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353540434] [2024-12-02 12:49:16,739 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:49:16,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:49:16,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:49:16,838 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-12-02 12:49:16,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:49:16,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353540434] [2024-12-02 12:49:16,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353540434] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 12:49:16,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 12:49:16,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 12:49:16,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881476136] [2024-12-02 12:49:16,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 12:49:16,839 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 12:49:16,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:49:16,839 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 12:49:16,839 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 12:49:16,840 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 88 [2024-12-02 12:49:16,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 78 transitions, 280 flow. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:49:16,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 12:49:16,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 88 [2024-12-02 12:49:16,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 12:49:19,124 INFO L124 PetriNetUnfolderBase]: 24419/36140 cut-off events. [2024-12-02 12:49:19,124 INFO L125 PetriNetUnfolderBase]: For 12706/14987 co-relation queries the response was YES. [2024-12-02 12:49:19,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81513 conditions, 36140 events. 24419/36140 cut-off events. For 12706/14987 co-relation queries the response was YES. Maximal size of possible extension queue 1041. Compared 232576 event pairs, 8589 based on Foata normal form. 732/28082 useless extension candidates. Maximal degree in co-relation 79370. Up to 23607 conditions per place. [2024-12-02 12:49:19,342 INFO L140 encePairwiseOnDemand]: 83/88 looper letters, 87 selfloop transitions, 2 changer transitions 0/109 dead transitions. [2024-12-02 12:49:19,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 109 transitions, 551 flow [2024-12-02 12:49:19,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 12:49:19,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-12-02 12:49:19,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 162 transitions. [2024-12-02 12:49:19,343 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6136363636363636 [2024-12-02 12:49:19,343 INFO L175 Difference]: Start difference. First operand has 74 places, 78 transitions, 280 flow. Second operand 3 states and 162 transitions. [2024-12-02 12:49:19,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 109 transitions, 551 flow [2024-12-02 12:49:19,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 109 transitions, 547 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-12-02 12:49:19,352 INFO L231 Difference]: Finished difference. Result has 75 places, 79 transitions, 294 flow [2024-12-02 12:49:19,352 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=294, PETRI_PLACES=75, PETRI_TRANSITIONS=79} [2024-12-02 12:49:19,353 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, -2 predicate places. [2024-12-02 12:49:19,353 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 79 transitions, 294 flow [2024-12-02 12:49:19,353 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:49:19,353 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 12:49:19,353 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] [2024-12-02 12:49:19,353 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-12-02 12:49:19,353 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-12-02 12:49:19,354 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:49:19,354 INFO L85 PathProgramCache]: Analyzing trace with hash 925029414, now seen corresponding path program 1 times [2024-12-02 12:49:19,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:49:19,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733035591] [2024-12-02 12:49:19,354 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:49:19,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:49:19,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:49:19,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:49:19,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:49:19,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733035591] [2024-12-02 12:49:19,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733035591] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 12:49:19,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 12:49:19,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 12:49:19,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781046211] [2024-12-02 12:49:19,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 12:49:19,454 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 12:49:19,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:49:19,455 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 12:49:19,455 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 12:49:19,455 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 88 [2024-12-02 12:49:19,455 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 79 transitions, 294 flow. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:49:19,455 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 12:49:19,456 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 88 [2024-12-02 12:49:19,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 12:49:22,110 INFO L124 PetriNetUnfolderBase]: 24429/36212 cut-off events. [2024-12-02 12:49:22,110 INFO L125 PetriNetUnfolderBase]: For 15382/17681 co-relation queries the response was YES. [2024-12-02 12:49:22,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84077 conditions, 36212 events. 24429/36212 cut-off events. For 15382/17681 co-relation queries the response was YES. Maximal size of possible extension queue 1100. Compared 234593 event pairs, 8400 based on Foata normal form. 3/27339 useless extension candidates. Maximal degree in co-relation 81936. Up to 29833 conditions per place. [2024-12-02 12:49:22,269 INFO L140 encePairwiseOnDemand]: 85/88 looper letters, 64 selfloop transitions, 2 changer transitions 11/97 dead transitions. [2024-12-02 12:49:22,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 97 transitions, 495 flow [2024-12-02 12:49:22,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 12:49:22,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-12-02 12:49:22,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 148 transitions. [2024-12-02 12:49:22,270 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5606060606060606 [2024-12-02 12:49:22,270 INFO L175 Difference]: Start difference. First operand has 75 places, 79 transitions, 294 flow. Second operand 3 states and 148 transitions. [2024-12-02 12:49:22,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 97 transitions, 495 flow [2024-12-02 12:49:22,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 97 transitions, 493 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-12-02 12:49:22,278 INFO L231 Difference]: Finished difference. Result has 77 places, 73 transitions, 265 flow [2024-12-02 12:49:22,278 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=265, PETRI_PLACES=77, PETRI_TRANSITIONS=73} [2024-12-02 12:49:22,278 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 0 predicate places. [2024-12-02 12:49:22,279 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 73 transitions, 265 flow [2024-12-02 12:49:22,279 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:49:22,279 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 12:49:22,279 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:49:22,279 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-12-02 12:49:22,279 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-12-02 12:49:22,279 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:49:22,279 INFO L85 PathProgramCache]: Analyzing trace with hash 984522394, now seen corresponding path program 1 times [2024-12-02 12:49:22,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:49:22,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23948853] [2024-12-02 12:49:22,279 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:49:22,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:49:22,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:49:22,380 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 12:49:22,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:49:22,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23948853] [2024-12-02 12:49:22,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23948853] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 12:49:22,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 12:49:22,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-12-02 12:49:22,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711789216] [2024-12-02 12:49:22,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 12:49:22,381 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 12:49:22,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:49:22,381 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 12:49:22,381 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 12:49:22,398 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 88 [2024-12-02 12:49:22,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 73 transitions, 265 flow. Second operand has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:49:22,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 12:49:22,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 88 [2024-12-02 12:49:22,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 12:49:24,193 INFO L124 PetriNetUnfolderBase]: 20685/30931 cut-off events. [2024-12-02 12:49:24,193 INFO L125 PetriNetUnfolderBase]: For 15899/17924 co-relation queries the response was YES. [2024-12-02 12:49:24,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72012 conditions, 30931 events. 20685/30931 cut-off events. For 15899/17924 co-relation queries the response was YES. Maximal size of possible extension queue 968. Compared 203080 event pairs, 16143 based on Foata normal form. 0/24299 useless extension candidates. Maximal degree in co-relation 71975. Up to 27583 conditions per place. [2024-12-02 12:49:24,356 INFO L140 encePairwiseOnDemand]: 84/88 looper letters, 49 selfloop transitions, 2 changer transitions 0/71 dead transitions. [2024-12-02 12:49:24,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 71 transitions, 361 flow [2024-12-02 12:49:24,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 12:49:24,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-12-02 12:49:24,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 144 transitions. [2024-12-02 12:49:24,357 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2024-12-02 12:49:24,357 INFO L175 Difference]: Start difference. First operand has 77 places, 73 transitions, 265 flow. Second operand 4 states and 144 transitions. [2024-12-02 12:49:24,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 71 transitions, 361 flow [2024-12-02 12:49:24,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 71 transitions, 345 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-12-02 12:49:24,365 INFO L231 Difference]: Finished difference. Result has 73 places, 71 transitions, 247 flow [2024-12-02 12:49:24,366 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=243, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=247, PETRI_PLACES=73, PETRI_TRANSITIONS=71} [2024-12-02 12:49:24,366 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, -4 predicate places. [2024-12-02 12:49:24,366 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 71 transitions, 247 flow [2024-12-02 12:49:24,366 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:49:24,366 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 12:49:24,367 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:49:24,367 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-12-02 12:49:24,367 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-12-02 12:49:24,367 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:49:24,367 INFO L85 PathProgramCache]: Analyzing trace with hash 984522395, now seen corresponding path program 1 times [2024-12-02 12:49:24,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:49:24,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429063630] [2024-12-02 12:49:24,367 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:49:24,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:49:24,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:49:24,450 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 12:49:24,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:49:24,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429063630] [2024-12-02 12:49:24,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429063630] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 12:49:24,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 12:49:24,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-12-02 12:49:24,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658012101] [2024-12-02 12:49:24,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 12:49:24,451 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 12:49:24,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:49:24,451 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 12:49:24,451 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 12:49:24,458 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 88 [2024-12-02 12:49:24,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 71 transitions, 247 flow. Second operand has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:49:24,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 12:49:24,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 88 [2024-12-02 12:49:24,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 12:49:26,766 INFO L124 PetriNetUnfolderBase]: 26934/40836 cut-off events. [2024-12-02 12:49:26,766 INFO L125 PetriNetUnfolderBase]: For 19343/21806 co-relation queries the response was YES. [2024-12-02 12:49:26,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93644 conditions, 40836 events. 26934/40836 cut-off events. For 19343/21806 co-relation queries the response was YES. Maximal size of possible extension queue 1063. Compared 277668 event pairs, 21455 based on Foata normal form. 340/32270 useless extension candidates. Maximal degree in co-relation 93608. Up to 27587 conditions per place. [2024-12-02 12:49:26,972 INFO L140 encePairwiseOnDemand]: 79/88 looper letters, 84 selfloop transitions, 8 changer transitions 0/112 dead transitions. [2024-12-02 12:49:26,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 112 transitions, 561 flow [2024-12-02 12:49:26,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 12:49:26,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-12-02 12:49:26,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 222 transitions. [2024-12-02 12:49:26,974 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5045454545454545 [2024-12-02 12:49:26,974 INFO L175 Difference]: Start difference. First operand has 73 places, 71 transitions, 247 flow. Second operand 5 states and 222 transitions. [2024-12-02 12:49:26,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 112 transitions, 561 flow [2024-12-02 12:49:26,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 112 transitions, 557 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-12-02 12:49:26,983 INFO L231 Difference]: Finished difference. Result has 78 places, 75 transitions, 293 flow [2024-12-02 12:49:26,983 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=293, PETRI_PLACES=78, PETRI_TRANSITIONS=75} [2024-12-02 12:49:26,983 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 1 predicate places. [2024-12-02 12:49:26,984 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 75 transitions, 293 flow [2024-12-02 12:49:26,984 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:49:26,984 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 12:49:26,984 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:49:26,984 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-12-02 12:49:26,984 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-12-02 12:49:26,984 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:49:26,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1233283775, now seen corresponding path program 1 times [2024-12-02 12:49:26,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:49:26,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982413388] [2024-12-02 12:49:26,984 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:49:26,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:49:26,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:49:27,021 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 12:49:27,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:49:27,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982413388] [2024-12-02 12:49:27,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982413388] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 12:49:27,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 12:49:27,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-12-02 12:49:27,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915981919] [2024-12-02 12:49:27,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 12:49:27,022 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 12:49:27,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:49:27,022 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 12:49:27,022 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 12:49:27,032 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 88 [2024-12-02 12:49:27,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 75 transitions, 293 flow. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:49:27,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 12:49:27,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 88 [2024-12-02 12:49:27,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 12:49:29,508 INFO L124 PetriNetUnfolderBase]: 29449/42288 cut-off events. [2024-12-02 12:49:29,508 INFO L125 PetriNetUnfolderBase]: For 19647/22006 co-relation queries the response was YES. [2024-12-02 12:49:29,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100510 conditions, 42288 events. 29449/42288 cut-off events. For 19647/22006 co-relation queries the response was YES. Maximal size of possible extension queue 811. Compared 249562 event pairs, 15757 based on Foata normal form. 474/35675 useless extension candidates. Maximal degree in co-relation 100467. Up to 26799 conditions per place. [2024-12-02 12:49:29,739 INFO L140 encePairwiseOnDemand]: 83/88 looper letters, 81 selfloop transitions, 5 changer transitions 0/100 dead transitions. [2024-12-02 12:49:29,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 100 transitions, 542 flow [2024-12-02 12:49:29,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 12:49:29,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-12-02 12:49:29,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 144 transitions. [2024-12-02 12:49:29,740 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5454545454545454 [2024-12-02 12:49:29,740 INFO L175 Difference]: Start difference. First operand has 78 places, 75 transitions, 293 flow. Second operand 3 states and 144 transitions. [2024-12-02 12:49:29,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 100 transitions, 542 flow [2024-12-02 12:49:29,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 100 transitions, 540 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-12-02 12:49:29,752 INFO L231 Difference]: Finished difference. Result has 81 places, 76 transitions, 319 flow [2024-12-02 12:49:29,752 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=291, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=319, PETRI_PLACES=81, PETRI_TRANSITIONS=76} [2024-12-02 12:49:29,752 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 4 predicate places. [2024-12-02 12:49:29,752 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 76 transitions, 319 flow [2024-12-02 12:49:29,753 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:49:29,753 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 12:49:29,753 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:49:29,753 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-12-02 12:49:29,753 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-12-02 12:49:29,753 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:49:29,754 INFO L85 PathProgramCache]: Analyzing trace with hash 1249465946, now seen corresponding path program 1 times [2024-12-02 12:49:29,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:49:29,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142882808] [2024-12-02 12:49:29,754 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:49:29,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:49:29,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:49:29,999 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 12:49:29,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:49:29,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142882808] [2024-12-02 12:49:29,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142882808] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 12:49:30,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944029152] [2024-12-02 12:49:30,000 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:49:30,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:49:30,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdb4760c-cd4d-4a65-b1b9-4ccd46c12a2c/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:49:30,001 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdb4760c-cd4d-4a65-b1b9-4ccd46c12a2c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:49:30,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdb4760c-cd4d-4a65-b1b9-4ccd46c12a2c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-12-02 12:49:30,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:49:30,098 INFO L256 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-12-02 12:49:30,100 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:49:30,233 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 12:49:30,233 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 12:49:30,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944029152] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 12:49:30,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-12-02 12:49:30,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2024-12-02 12:49:30,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620885070] [2024-12-02 12:49:30,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 12:49:30,234 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 12:49:30,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:49:30,235 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 12:49:30,235 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-12-02 12:49:30,255 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 88 [2024-12-02 12:49:30,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 76 transitions, 319 flow. Second operand has 5 states, 5 states have (on average 31.0) internal successors, (155), 5 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:49:30,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 12:49:30,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 88 [2024-12-02 12:49:30,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 12:49:32,240 INFO L124 PetriNetUnfolderBase]: 20049/30510 cut-off events. [2024-12-02 12:49:32,240 INFO L125 PetriNetUnfolderBase]: For 22259/24374 co-relation queries the response was YES. [2024-12-02 12:49:32,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72190 conditions, 30510 events. 20049/30510 cut-off events. For 22259/24374 co-relation queries the response was YES. Maximal size of possible extension queue 673. Compared 195338 event pairs, 16312 based on Foata normal form. 1518/25848 useless extension candidates. Maximal degree in co-relation 72146. Up to 27054 conditions per place. [2024-12-02 12:49:32,360 INFO L140 encePairwiseOnDemand]: 82/88 looper letters, 47 selfloop transitions, 6 changer transitions 0/74 dead transitions. [2024-12-02 12:49:32,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 74 transitions, 417 flow [2024-12-02 12:49:32,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 12:49:32,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-12-02 12:49:32,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 154 transitions. [2024-12-02 12:49:32,362 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-12-02 12:49:32,362 INFO L175 Difference]: Start difference. First operand has 81 places, 76 transitions, 319 flow. Second operand 4 states and 154 transitions. [2024-12-02 12:49:32,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 74 transitions, 417 flow [2024-12-02 12:49:32,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 74 transitions, 407 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-12-02 12:49:32,371 INFO L231 Difference]: Finished difference. Result has 80 places, 74 transitions, 313 flow [2024-12-02 12:49:32,371 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=301, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=313, PETRI_PLACES=80, PETRI_TRANSITIONS=74} [2024-12-02 12:49:32,372 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 3 predicate places. [2024-12-02 12:49:32,372 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 74 transitions, 313 flow [2024-12-02 12:49:32,372 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.0) internal successors, (155), 5 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:49:32,372 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 12:49:32,372 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 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] [2024-12-02 12:49:32,378 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdb4760c-cd4d-4a65-b1b9-4ccd46c12a2c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-12-02 12:49:32,572 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdb4760c-cd4d-4a65-b1b9-4ccd46c12a2c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:49:32,573 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-12-02 12:49:32,573 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:49:32,573 INFO L85 PathProgramCache]: Analyzing trace with hash 933764193, now seen corresponding path program 1 times [2024-12-02 12:49:32,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:49:32,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275646482] [2024-12-02 12:49:32,573 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:49:32,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:49:32,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:49:32,605 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-12-02 12:49:32,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:49:32,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275646482] [2024-12-02 12:49:32,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275646482] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 12:49:32,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 12:49:32,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-12-02 12:49:32,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370910293] [2024-12-02 12:49:32,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 12:49:32,606 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 12:49:32,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:49:32,607 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 12:49:32,607 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 12:49:32,616 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 88 [2024-12-02 12:49:32,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 74 transitions, 313 flow. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:49:32,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 12:49:32,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 88 [2024-12-02 12:49:32,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 12:49:35,432 INFO L124 PetriNetUnfolderBase]: 30537/44719 cut-off events. [2024-12-02 12:49:35,432 INFO L125 PetriNetUnfolderBase]: For 23104/26138 co-relation queries the response was YES. [2024-12-02 12:49:35,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106492 conditions, 44719 events. 30537/44719 cut-off events. For 23104/26138 co-relation queries the response was YES. Maximal size of possible extension queue 661. Compared 269162 event pairs, 19837 based on Foata normal form. 680/37628 useless extension candidates. Maximal degree in co-relation 106446. Up to 33291 conditions per place. [2024-12-02 12:49:35,690 INFO L140 encePairwiseOnDemand]: 82/88 looper letters, 80 selfloop transitions, 4 changer transitions 0/98 dead transitions. [2024-12-02 12:49:35,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 98 transitions, 554 flow [2024-12-02 12:49:35,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 12:49:35,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-12-02 12:49:35,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 142 transitions. [2024-12-02 12:49:35,691 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5378787878787878 [2024-12-02 12:49:35,691 INFO L175 Difference]: Start difference. First operand has 80 places, 74 transitions, 313 flow. Second operand 3 states and 142 transitions. [2024-12-02 12:49:35,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 98 transitions, 554 flow [2024-12-02 12:49:35,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 98 transitions, 544 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-12-02 12:49:35,704 INFO L231 Difference]: Finished difference. Result has 82 places, 75 transitions, 329 flow [2024-12-02 12:49:35,704 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=303, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=329, PETRI_PLACES=82, PETRI_TRANSITIONS=75} [2024-12-02 12:49:35,705 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 5 predicate places. [2024-12-02 12:49:35,705 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 75 transitions, 329 flow [2024-12-02 12:49:35,705 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:49:35,705 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 12:49:35,705 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 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, 1, 1] [2024-12-02 12:49:35,705 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-12-02 12:49:35,705 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-12-02 12:49:35,706 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:49:35,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1141653296, now seen corresponding path program 1 times [2024-12-02 12:49:35,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:49:35,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189766690] [2024-12-02 12:49:35,706 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:49:35,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:49:35,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:49:35,999 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:49:35,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:49:35,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189766690] [2024-12-02 12:49:35,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189766690] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 12:49:35,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219483226] [2024-12-02 12:49:35,999 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:49:35,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:49:35,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdb4760c-cd4d-4a65-b1b9-4ccd46c12a2c/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:49:36,002 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdb4760c-cd4d-4a65-b1b9-4ccd46c12a2c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:49:36,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdb4760c-cd4d-4a65-b1b9-4ccd46c12a2c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-12-02 12:49:36,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:49:36,084 INFO L256 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-12-02 12:49:36,086 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:49:36,123 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 [2024-12-02 12:49:36,358 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:49:36,358 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 12:49:36,794 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2024-12-02 12:49:36,807 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-12-02 12:49:36,807 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 110 treesize of output 89 [2024-12-02 12:49:36,881 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:49:36,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219483226] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 12:49:36,881 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 12:49:36,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 20 [2024-12-02 12:49:36,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394414148] [2024-12-02 12:49:36,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 12:49:36,882 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-12-02 12:49:36,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:49:36,883 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-12-02 12:49:36,883 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2024-12-02 12:49:37,093 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 88 [2024-12-02 12:49:37,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 75 transitions, 329 flow. Second operand has 21 states, 21 states have (on average 31.428571428571427) internal successors, (660), 21 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:49:37,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 12:49:37,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 88 [2024-12-02 12:49:37,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 12:49:46,994 INFO L124 PetriNetUnfolderBase]: 84152/129546 cut-off events. [2024-12-02 12:49:46,994 INFO L125 PetriNetUnfolderBase]: For 81940/90657 co-relation queries the response was YES. [2024-12-02 12:49:47,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 307535 conditions, 129546 events. 84152/129546 cut-off events. For 81940/90657 co-relation queries the response was YES. Maximal size of possible extension queue 2048. Compared 977496 event pairs, 16761 based on Foata normal form. 20/104109 useless extension candidates. Maximal degree in co-relation 210612. Up to 33822 conditions per place. [2024-12-02 12:49:47,711 INFO L140 encePairwiseOnDemand]: 66/88 looper letters, 266 selfloop transitions, 62 changer transitions 73/423 dead transitions. [2024-12-02 12:49:47,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 423 transitions, 2274 flow [2024-12-02 12:49:47,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-12-02 12:49:47,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-12-02 12:49:47,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1066 transitions. [2024-12-02 12:49:47,714 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.48454545454545456 [2024-12-02 12:49:47,714 INFO L175 Difference]: Start difference. First operand has 82 places, 75 transitions, 329 flow. Second operand 25 states and 1066 transitions. [2024-12-02 12:49:47,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 423 transitions, 2274 flow [2024-12-02 12:49:47,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 423 transitions, 2236 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-12-02 12:49:47,762 INFO L231 Difference]: Finished difference. Result has 117 places, 128 transitions, 863 flow [2024-12-02 12:49:47,762 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=321, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=863, PETRI_PLACES=117, PETRI_TRANSITIONS=128} [2024-12-02 12:49:47,763 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 40 predicate places. [2024-12-02 12:49:47,763 INFO L471 AbstractCegarLoop]: Abstraction has has 117 places, 128 transitions, 863 flow [2024-12-02 12:49:47,763 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 31.428571428571427) internal successors, (660), 21 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:49:47,763 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 12:49:47,763 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 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, 1, 1] [2024-12-02 12:49:47,771 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdb4760c-cd4d-4a65-b1b9-4ccd46c12a2c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-12-02 12:49:47,963 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdb4760c-cd4d-4a65-b1b9-4ccd46c12a2c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-12-02 12:49:47,964 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-12-02 12:49:47,964 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:49:47,964 INFO L85 PathProgramCache]: Analyzing trace with hash 670465406, now seen corresponding path program 1 times [2024-12-02 12:49:47,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:49:47,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209245033] [2024-12-02 12:49:47,964 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:49:47,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:49:48,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:49:48,838 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 12:49:48,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:49:48,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209245033] [2024-12-02 12:49:48,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209245033] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 12:49:48,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382041223] [2024-12-02 12:49:48,839 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:49:48,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:49:48,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdb4760c-cd4d-4a65-b1b9-4ccd46c12a2c/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:49:48,841 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdb4760c-cd4d-4a65-b1b9-4ccd46c12a2c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:49:48,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdb4760c-cd4d-4a65-b1b9-4ccd46c12a2c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-12-02 12:49:48,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:49:48,958 INFO L256 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-12-02 12:49:48,960 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:49:49,114 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-12-02 12:49:49,114 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 12:49:49,171 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-12-02 12:49:49,171 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 7 [2024-12-02 12:49:49,266 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-12-02 12:49:49,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382041223] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 12:49:49,266 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 12:49:49,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 15 [2024-12-02 12:49:49,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766940656] [2024-12-02 12:49:49,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 12:49:49,266 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-12-02 12:49:49,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:49:49,267 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-12-02 12:49:49,267 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2024-12-02 12:49:49,341 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 88 [2024-12-02 12:49:49,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 128 transitions, 863 flow. Second operand has 16 states, 16 states have (on average 32.125) internal successors, (514), 16 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:49:49,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 12:49:49,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 88 [2024-12-02 12:49:49,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 12:50:02,162 INFO L124 PetriNetUnfolderBase]: 82960/127540 cut-off events. [2024-12-02 12:50:02,162 INFO L125 PetriNetUnfolderBase]: For 310053/319201 co-relation queries the response was YES. [2024-12-02 12:50:02,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 419948 conditions, 127540 events. 82960/127540 cut-off events. For 310053/319201 co-relation queries the response was YES. Maximal size of possible extension queue 2113. Compared 970920 event pairs, 25248 based on Foata normal form. 45/102242 useless extension candidates. Maximal degree in co-relation 323888. Up to 92143 conditions per place. [2024-12-02 12:50:03,053 INFO L140 encePairwiseOnDemand]: 71/88 looper letters, 171 selfloop transitions, 59 changer transitions 50/302 dead transitions. [2024-12-02 12:50:03,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 302 transitions, 2152 flow [2024-12-02 12:50:03,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-12-02 12:50:03,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-12-02 12:50:03,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 652 transitions. [2024-12-02 12:50:03,056 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4630681818181818 [2024-12-02 12:50:03,057 INFO L175 Difference]: Start difference. First operand has 117 places, 128 transitions, 863 flow. Second operand 16 states and 652 transitions. [2024-12-02 12:50:03,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 302 transitions, 2152 flow [2024-12-02 12:50:03,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 302 transitions, 2112 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-12-02 12:50:03,975 INFO L231 Difference]: Finished difference. Result has 139 places, 158 transitions, 1307 flow [2024-12-02 12:50:03,975 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=823, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1307, PETRI_PLACES=139, PETRI_TRANSITIONS=158} [2024-12-02 12:50:03,976 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 62 predicate places. [2024-12-02 12:50:03,976 INFO L471 AbstractCegarLoop]: Abstraction has has 139 places, 158 transitions, 1307 flow [2024-12-02 12:50:03,976 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 32.125) internal successors, (514), 16 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:50:03,976 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 12:50:03,976 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 2, 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] [2024-12-02 12:50:03,982 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdb4760c-cd4d-4a65-b1b9-4ccd46c12a2c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-12-02 12:50:04,176 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdb4760c-cd4d-4a65-b1b9-4ccd46c12a2c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-12-02 12:50:04,176 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-12-02 12:50:04,177 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:50:04,177 INFO L85 PathProgramCache]: Analyzing trace with hash -1853955870, now seen corresponding path program 1 times [2024-12-02 12:50:04,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:50:04,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377473699] [2024-12-02 12:50:04,177 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:50:04,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:50:04,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:50:04,288 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-12-02 12:50:04,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:50:04,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377473699] [2024-12-02 12:50:04,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377473699] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 12:50:04,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 12:50:04,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-12-02 12:50:04,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100878279] [2024-12-02 12:50:04,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 12:50:04,289 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 12:50:04,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:50:04,289 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 12:50:04,289 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 12:50:04,299 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 88 [2024-12-02 12:50:04,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 158 transitions, 1307 flow. Second operand has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:50:04,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 12:50:04,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 88 [2024-12-02 12:50:04,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 12:50:23,524 INFO L124 PetriNetUnfolderBase]: 107983/167383 cut-off events. [2024-12-02 12:50:23,524 INFO L125 PetriNetUnfolderBase]: For 912823/924019 co-relation queries the response was YES. [2024-12-02 12:50:24,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 743701 conditions, 167383 events. 107983/167383 cut-off events. For 912823/924019 co-relation queries the response was YES. Maximal size of possible extension queue 2817. Compared 1361989 event pairs, 71818 based on Foata normal form. 408/134421 useless extension candidates. Maximal degree in co-relation 574254. Up to 104829 conditions per place. [2024-12-02 12:50:25,341 INFO L140 encePairwiseOnDemand]: 79/88 looper letters, 227 selfloop transitions, 15 changer transitions 0/264 dead transitions. [2024-12-02 12:50:25,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 264 transitions, 2762 flow [2024-12-02 12:50:25,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 12:50:25,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-12-02 12:50:25,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 220 transitions. [2024-12-02 12:50:25,342 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-12-02 12:50:25,342 INFO L175 Difference]: Start difference. First operand has 139 places, 158 transitions, 1307 flow. Second operand 5 states and 220 transitions. [2024-12-02 12:50:25,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 264 transitions, 2762 flow [2024-12-02 12:50:29,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 264 transitions, 2572 flow, removed 68 selfloop flow, removed 6 redundant places. [2024-12-02 12:50:29,858 INFO L231 Difference]: Finished difference. Result has 139 places, 159 transitions, 1264 flow [2024-12-02 12:50:29,858 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=1203, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1264, PETRI_PLACES=139, PETRI_TRANSITIONS=159} [2024-12-02 12:50:29,859 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 62 predicate places. [2024-12-02 12:50:29,859 INFO L471 AbstractCegarLoop]: Abstraction has has 139 places, 159 transitions, 1264 flow [2024-12-02 12:50:29,859 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:50:29,859 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 12:50:29,859 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 2, 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] [2024-12-02 12:50:29,859 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-12-02 12:50:29,859 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-12-02 12:50:29,860 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:50:29,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1354350826, now seen corresponding path program 1 times [2024-12-02 12:50:29,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:50:29,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948853814] [2024-12-02 12:50:29,860 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:50:29,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:50:29,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:50:29,949 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-12-02 12:50:29,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:50:29,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948853814] [2024-12-02 12:50:29,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948853814] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 12:50:29,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320574466] [2024-12-02 12:50:29,949 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:50:29,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:50:29,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdb4760c-cd4d-4a65-b1b9-4ccd46c12a2c/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:50:29,953 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdb4760c-cd4d-4a65-b1b9-4ccd46c12a2c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:50:29,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdb4760c-cd4d-4a65-b1b9-4ccd46c12a2c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-12-02 12:50:30,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:50:30,061 INFO L256 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-12-02 12:50:30,062 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:50:30,168 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-12-02 12:50:30,168 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 12:50:30,300 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-12-02 12:50:30,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320574466] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 12:50:30,300 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 12:50:30,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 5, 5] total 10 [2024-12-02 12:50:30,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334737665] [2024-12-02 12:50:30,300 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 12:50:30,301 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-12-02 12:50:30,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:50:30,301 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-12-02 12:50:30,301 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-12-02 12:50:30,337 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 88 [2024-12-02 12:50:30,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 159 transitions, 1264 flow. Second operand has 11 states, 11 states have (on average 32.45454545454545) internal successors, (357), 11 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:50:30,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 12:50:30,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 88 [2024-12-02 12:50:30,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 12:50:48,238 INFO L124 PetriNetUnfolderBase]: 101790/158863 cut-off events. [2024-12-02 12:50:48,238 INFO L125 PetriNetUnfolderBase]: For 883411/894459 co-relation queries the response was YES. [2024-12-02 12:50:49,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 698726 conditions, 158863 events. 101790/158863 cut-off events. For 883411/894459 co-relation queries the response was YES. Maximal size of possible extension queue 1543. Compared 1237305 event pairs, 27086 based on Foata normal form. 2466/129049 useless extension candidates. Maximal degree in co-relation 599365. Up to 43947 conditions per place. [2024-12-02 12:50:49,671 INFO L140 encePairwiseOnDemand]: 76/88 looper letters, 213 selfloop transitions, 39 changer transitions 17/291 dead transitions. [2024-12-02 12:50:49,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 291 transitions, 2677 flow [2024-12-02 12:50:49,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-12-02 12:50:49,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-12-02 12:50:49,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 536 transitions. [2024-12-02 12:50:49,674 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5075757575757576 [2024-12-02 12:50:49,674 INFO L175 Difference]: Start difference. First operand has 139 places, 159 transitions, 1264 flow. Second operand 12 states and 536 transitions. [2024-12-02 12:50:49,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 291 transitions, 2677 flow [2024-12-02 12:50:51,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 291 transitions, 2450 flow, removed 105 selfloop flow, removed 6 redundant places. [2024-12-02 12:50:51,054 INFO L231 Difference]: Finished difference. Result has 142 places, 146 transitions, 1247 flow [2024-12-02 12:50:51,054 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=1014, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1247, PETRI_PLACES=142, PETRI_TRANSITIONS=146} [2024-12-02 12:50:51,055 INFO L279 CegarLoopForPetriNet]: 77 programPoint places, 65 predicate places. [2024-12-02 12:50:51,055 INFO L471 AbstractCegarLoop]: Abstraction has has 142 places, 146 transitions, 1247 flow [2024-12-02 12:50:51,055 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 32.45454545454545) internal successors, (357), 11 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:50:51,055 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 12:50:51,055 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:50:51,061 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdb4760c-cd4d-4a65-b1b9-4ccd46c12a2c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-12-02 12:50:51,256 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdb4760c-cd4d-4a65-b1b9-4ccd46c12a2c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:50:51,256 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-12-02 12:50:51,256 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:50:51,257 INFO L85 PathProgramCache]: Analyzing trace with hash -290903089, now seen corresponding path program 1 times [2024-12-02 12:50:51,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:50:51,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642343470] [2024-12-02 12:50:51,257 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:50:51,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:50:51,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:50:52,070 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-12-02 12:50:52,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:50:52,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642343470] [2024-12-02 12:50:52,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642343470] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 12:50:52,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138812625] [2024-12-02 12:50:52,070 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:50:52,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:50:52,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdb4760c-cd4d-4a65-b1b9-4ccd46c12a2c/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:50:52,072 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdb4760c-cd4d-4a65-b1b9-4ccd46c12a2c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:50:52,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cdb4760c-cd4d-4a65-b1b9-4ccd46c12a2c/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-12-02 12:50:52,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:50:52,164 INFO L256 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-12-02 12:50:52,166 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:50:52,205 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-12-02 12:50:52,534 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 12:50:52,534 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 12:50:53,015 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2024-12-02 12:50:53,023 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-12-02 12:50:53,023 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 41 [2024-12-02 12:50:53,083 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 12:50:53,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138812625] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 12:50:53,083 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 12:50:53,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 22 [2024-12-02 12:50:53,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693419321] [2024-12-02 12:50:53,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 12:50:53,083 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-12-02 12:50:53,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:50:53,084 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-12-02 12:50:53,084 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2024-12-02 12:50:53,243 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 88 [2024-12-02 12:50:53,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 146 transitions, 1247 flow. Second operand has 22 states, 22 states have (on average 31.818181818181817) internal successors, (700), 22 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:50:53,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 12:50:53,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 88 [2024-12-02 12:50:53,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand