./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4fc63b2a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a19248b-78d3-4afb-b44f-c79f9ff1391d/bin/uautomizer-verify-4GaUIPS5ZU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a19248b-78d3-4afb-b44f-c79f9ff1391d/bin/uautomizer-verify-4GaUIPS5ZU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a19248b-78d3-4afb-b44f-c79f9ff1391d/bin/uautomizer-verify-4GaUIPS5ZU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a19248b-78d3-4afb-b44f-c79f9ff1391d/bin/uautomizer-verify-4GaUIPS5ZU/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a19248b-78d3-4afb-b44f-c79f9ff1391d/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a19248b-78d3-4afb-b44f-c79f9ff1391d/bin/uautomizer-verify-4GaUIPS5ZU --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 14a9c1cac7f040ebf84fc8e1c821294cab75b8332a1643f6e05ef67dfff453ec --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-10-31 22:08:12,874 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-31 22:08:12,972 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a19248b-78d3-4afb-b44f-c79f9ff1391d/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-31 22:08:12,978 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-31 22:08:12,978 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-31 22:08:13,021 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-31 22:08:13,022 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-31 22:08:13,023 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-31 22:08:13,023 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-31 22:08:13,024 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-31 22:08:13,024 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-31 22:08:13,025 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-31 22:08:13,026 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-31 22:08:13,029 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-31 22:08:13,029 INFO L153 SettingsManager]: * Use SBE=true [2024-10-31 22:08:13,030 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-31 22:08:13,030 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-31 22:08:13,031 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-31 22:08:13,031 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-31 22:08:13,035 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-31 22:08:13,036 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-31 22:08:13,036 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-31 22:08:13,037 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-31 22:08:13,037 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-31 22:08:13,037 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-31 22:08:13,038 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-31 22:08:13,038 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-31 22:08:13,038 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-31 22:08:13,038 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-31 22:08:13,039 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-31 22:08:13,043 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-31 22:08:13,043 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-31 22:08:13,043 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-31 22:08:13,044 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:08:13,044 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-31 22:08:13,045 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-31 22:08:13,045 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-31 22:08:13,046 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-31 22:08:13,046 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-31 22:08:13,047 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-31 22:08:13,047 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-31 22:08:13,048 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-31 22:08:13,048 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a19248b-78d3-4afb-b44f-c79f9ff1391d/bin/uautomizer-verify-4GaUIPS5ZU/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a19248b-78d3-4afb-b44f-c79f9ff1391d/bin/uautomizer-verify-4GaUIPS5ZU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 14a9c1cac7f040ebf84fc8e1c821294cab75b8332a1643f6e05ef67dfff453ec [2024-10-31 22:08:13,328 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-31 22:08:13,372 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-31 22:08:13,375 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-31 22:08:13,376 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-31 22:08:13,377 INFO L274 PluginConnector]: CDTParser initialized [2024-10-31 22:08:13,378 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a19248b-78d3-4afb-b44f-c79f9ff1391d/bin/uautomizer-verify-4GaUIPS5ZU/../../sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c Unable to find full path for "g++" [2024-10-31 22:08:15,344 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-31 22:08:15,596 INFO L384 CDTParser]: Found 1 translation units. [2024-10-31 22:08:15,597 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a19248b-78d3-4afb-b44f-c79f9ff1391d/sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c [2024-10-31 22:08:15,606 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a19248b-78d3-4afb-b44f-c79f9ff1391d/bin/uautomizer-verify-4GaUIPS5ZU/data/fcc8cf9c7/d5646abd267e439b8356826e54d725ef/FLAG4406b7625 [2024-10-31 22:08:15,915 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a19248b-78d3-4afb-b44f-c79f9ff1391d/bin/uautomizer-verify-4GaUIPS5ZU/data/fcc8cf9c7/d5646abd267e439b8356826e54d725ef [2024-10-31 22:08:15,921 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-31 22:08:15,923 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-31 22:08:15,924 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-31 22:08:15,924 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-31 22:08:15,937 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-31 22:08:15,941 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:08:15" (1/1) ... [2024-10-31 22:08:15,942 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@647539e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:08:15, skipping insertion in model container [2024-10-31 22:08:15,943 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:08:15" (1/1) ... [2024-10-31 22:08:16,003 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-31 22:08:16,344 WARN L1053 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-10-31 22:08:16,350 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:08:16,364 INFO L200 MainTranslator]: Completed pre-run [2024-10-31 22:08:16,403 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:08:16,430 INFO L204 MainTranslator]: Completed translation [2024-10-31 22:08:16,431 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:08:16 WrapperNode [2024-10-31 22:08:16,431 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-31 22:08:16,432 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-31 22:08:16,433 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-31 22:08:16,433 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-31 22:08:16,441 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:08:16" (1/1) ... [2024-10-31 22:08:16,450 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:08:16" (1/1) ... [2024-10-31 22:08:16,485 INFO L138 Inliner]: procedures = 25, calls = 27, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 134 [2024-10-31 22:08:16,485 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-31 22:08:16,486 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-31 22:08:16,489 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-31 22:08:16,490 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-31 22:08:16,502 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:08:16" (1/1) ... [2024-10-31 22:08:16,502 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:08:16" (1/1) ... [2024-10-31 22:08:16,505 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:08:16" (1/1) ... [2024-10-31 22:08:16,542 INFO L175 MemorySlicer]: Split 5 memory accesses to 2 slices as follows [2, 3]. 60 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-10-31 22:08:16,543 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:08:16" (1/1) ... [2024-10-31 22:08:16,543 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:08:16" (1/1) ... [2024-10-31 22:08:16,554 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:08:16" (1/1) ... [2024-10-31 22:08:16,566 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:08:16" (1/1) ... [2024-10-31 22:08:16,571 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:08:16" (1/1) ... [2024-10-31 22:08:16,573 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:08:16" (1/1) ... [2024-10-31 22:08:16,582 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-31 22:08:16,586 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-31 22:08:16,586 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-31 22:08:16,586 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-31 22:08:16,591 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:08:16" (1/1) ... [2024-10-31 22:08:16,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:08:16,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a19248b-78d3-4afb-b44f-c79f9ff1391d/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:08:16,664 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a19248b-78d3-4afb-b44f-c79f9ff1391d/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-31 22:08:16,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a19248b-78d3-4afb-b44f-c79f9ff1391d/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-31 22:08:16,705 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-31 22:08:16,705 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-31 22:08:16,705 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-31 22:08:16,705 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-31 22:08:16,705 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-31 22:08:16,706 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-31 22:08:16,706 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-31 22:08:16,706 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-31 22:08:16,706 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-31 22:08:16,706 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-10-31 22:08:16,706 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-10-31 22:08:16,707 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-31 22:08:16,707 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-31 22:08:16,707 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-31 22:08:16,707 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-31 22:08:16,707 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-31 22:08:16,710 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-31 22:08:16,862 INFO L238 CfgBuilder]: Building ICFG [2024-10-31 22:08:16,863 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-31 22:08:17,205 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-31 22:08:17,205 INFO L287 CfgBuilder]: Performing block encoding [2024-10-31 22:08:17,544 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-31 22:08:17,544 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-10-31 22:08:17,545 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:08:17 BoogieIcfgContainer [2024-10-31 22:08:17,545 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-31 22:08:17,548 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-31 22:08:17,549 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-31 22:08:17,552 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-31 22:08:17,553 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.10 10:08:15" (1/3) ... [2024-10-31 22:08:17,555 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77e19223 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:08:17, skipping insertion in model container [2024-10-31 22:08:17,556 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:08:16" (2/3) ... [2024-10-31 22:08:17,556 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77e19223 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:08:17, skipping insertion in model container [2024-10-31 22:08:17,557 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:08:17" (3/3) ... [2024-10-31 22:08:17,560 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-counter-queue2.wvr.c [2024-10-31 22:08:17,579 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-31 22:08:17,579 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2024-10-31 22:08:17,579 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-31 22:08:17,709 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-10-31 22:08:17,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 37 places, 33 transitions, 80 flow [2024-10-31 22:08:17,796 INFO L124 PetriNetUnfolderBase]: 3/31 cut-off events. [2024-10-31 22:08:17,797 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-31 22:08:17,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40 conditions, 31 events. 3/31 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 56 event pairs, 0 based on Foata normal form. 0/20 useless extension candidates. Maximal degree in co-relation 19. Up to 2 conditions per place. [2024-10-31 22:08:17,800 INFO L82 GeneralOperation]: Start removeDead. Operand has 37 places, 33 transitions, 80 flow [2024-10-31 22:08:17,803 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 34 places, 30 transitions, 72 flow [2024-10-31 22:08:17,814 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 22:08:17,822 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;@16d28fc2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 22:08:17,822 INFO L334 AbstractCegarLoop]: Starting to check reachability of 14 error locations. [2024-10-31 22:08:17,829 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-31 22:08:17,829 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-10-31 22:08:17,829 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-31 22:08:17,829 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:08:17,830 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-31 22:08:17,831 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-10-31 22:08:17,836 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:08:17,836 INFO L85 PathProgramCache]: Analyzing trace with hash 456406, now seen corresponding path program 1 times [2024-10-31 22:08:17,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:08:17,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881394571] [2024-10-31 22:08:17,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:08:17,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:08:17,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:08:18,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:08:18,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:08:18,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881394571] [2024-10-31 22:08:18,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881394571] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:08:18,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:08:18,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-31 22:08:18,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249925466] [2024-10-31 22:08:18,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:08:18,180 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:08:18,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:08:18,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:08:18,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:08:18,238 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-10-31 22:08:18,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 30 transitions, 72 flow. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:08:18,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:08:18,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-10-31 22:08:18,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:08:18,410 INFO L124 PetriNetUnfolderBase]: 128/233 cut-off events. [2024-10-31 22:08:18,410 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2024-10-31 22:08:18,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 481 conditions, 233 events. 128/233 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 987 event pairs, 100 based on Foata normal form. 1/172 useless extension candidates. Maximal degree in co-relation 428. Up to 221 conditions per place. [2024-10-31 22:08:18,416 INFO L140 encePairwiseOnDemand]: 29/33 looper letters, 21 selfloop transitions, 2 changer transitions 0/27 dead transitions. [2024-10-31 22:08:18,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 27 transitions, 112 flow [2024-10-31 22:08:18,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:08:18,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 22:08:18,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 46 transitions. [2024-10-31 22:08:18,429 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.46464646464646464 [2024-10-31 22:08:18,431 INFO L175 Difference]: Start difference. First operand has 34 places, 30 transitions, 72 flow. Second operand 3 states and 46 transitions. [2024-10-31 22:08:18,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 27 transitions, 112 flow [2024-10-31 22:08:18,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 27 transitions, 104 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-31 22:08:18,437 INFO L231 Difference]: Finished difference. Result has 29 places, 27 transitions, 62 flow [2024-10-31 22:08:18,441 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=62, PETRI_PLACES=29, PETRI_TRANSITIONS=27} [2024-10-31 22:08:18,446 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, -5 predicate places. [2024-10-31 22:08:18,446 INFO L471 AbstractCegarLoop]: Abstraction has has 29 places, 27 transitions, 62 flow [2024-10-31 22:08:18,446 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:08:18,446 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:08:18,446 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-31 22:08:18,447 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-31 22:08:18,447 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-10-31 22:08:18,448 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:08:18,448 INFO L85 PathProgramCache]: Analyzing trace with hash 456407, now seen corresponding path program 1 times [2024-10-31 22:08:18,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:08:18,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853549262] [2024-10-31 22:08:18,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:08:18,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:08:18,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:08:18,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:08:18,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:08:18,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853549262] [2024-10-31 22:08:18,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853549262] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:08:18,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:08:18,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:08:18,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282607805] [2024-10-31 22:08:18,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:08:18,941 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:08:18,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:08:18,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:08:18,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:08:18,952 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-10-31 22:08:18,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 27 transitions, 62 flow. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:08:18,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:08:18,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-10-31 22:08:18,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:08:19,183 INFO L124 PetriNetUnfolderBase]: 129/236 cut-off events. [2024-10-31 22:08:19,183 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-10-31 22:08:19,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 476 conditions, 236 events. 129/236 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 984 event pairs, 100 based on Foata normal form. 0/174 useless extension candidates. Maximal degree in co-relation 454. Up to 226 conditions per place. [2024-10-31 22:08:19,187 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 23 selfloop transitions, 4 changer transitions 0/30 dead transitions. [2024-10-31 22:08:19,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 30 transitions, 124 flow [2024-10-31 22:08:19,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:08:19,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-31 22:08:19,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 56 transitions. [2024-10-31 22:08:19,190 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42424242424242425 [2024-10-31 22:08:19,190 INFO L175 Difference]: Start difference. First operand has 29 places, 27 transitions, 62 flow. Second operand 4 states and 56 transitions. [2024-10-31 22:08:19,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 30 transitions, 124 flow [2024-10-31 22:08:19,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 30 transitions, 118 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-31 22:08:19,192 INFO L231 Difference]: Finished difference. Result has 32 places, 30 transitions, 85 flow [2024-10-31 22:08:19,193 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=85, PETRI_PLACES=32, PETRI_TRANSITIONS=30} [2024-10-31 22:08:19,194 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, -2 predicate places. [2024-10-31 22:08:19,194 INFO L471 AbstractCegarLoop]: Abstraction has has 32 places, 30 transitions, 85 flow [2024-10-31 22:08:19,195 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:08:19,195 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:08:19,195 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-10-31 22:08:19,195 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-31 22:08:19,196 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-10-31 22:08:19,198 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:08:19,198 INFO L85 PathProgramCache]: Analyzing trace with hash 438621474, now seen corresponding path program 1 times [2024-10-31 22:08:19,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:08:19,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908729803] [2024-10-31 22:08:19,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:08:19,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:08:19,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:08:19,586 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:08:19,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:08:19,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908729803] [2024-10-31 22:08:19,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908729803] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:08:19,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753016058] [2024-10-31 22:08:19,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:08:19,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:08:19,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a19248b-78d3-4afb-b44f-c79f9ff1391d/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:08:19,590 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a19248b-78d3-4afb-b44f-c79f9ff1391d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:08:19,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a19248b-78d3-4afb-b44f-c79f9ff1391d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-31 22:08:19,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:08:19,682 INFO L255 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-31 22:08:19,687 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:08:19,771 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-10-31 22:08:19,973 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:08:19,973 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:08:20,149 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:08:20,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753016058] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:08:20,150 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:08:20,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-10-31 22:08:20,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421767625] [2024-10-31 22:08:20,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:08:20,152 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-31 22:08:20,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:08:20,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-31 22:08:20,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-10-31 22:08:20,207 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-10-31 22:08:20,208 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 30 transitions, 85 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:08:20,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:08:20,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-10-31 22:08:20,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:08:20,643 INFO L124 PetriNetUnfolderBase]: 130/238 cut-off events. [2024-10-31 22:08:20,643 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-10-31 22:08:20,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 492 conditions, 238 events. 130/238 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 986 event pairs, 100 based on Foata normal form. 0/175 useless extension candidates. Maximal degree in co-relation 461. Up to 223 conditions per place. [2024-10-31 22:08:20,645 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 19 selfloop transitions, 10 changer transitions 0/32 dead transitions. [2024-10-31 22:08:20,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 32 transitions, 151 flow [2024-10-31 22:08:20,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-31 22:08:20,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-31 22:08:20,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 87 transitions. [2024-10-31 22:08:20,648 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.32954545454545453 [2024-10-31 22:08:20,648 INFO L175 Difference]: Start difference. First operand has 32 places, 30 transitions, 85 flow. Second operand 8 states and 87 transitions. [2024-10-31 22:08:20,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 32 transitions, 151 flow [2024-10-31 22:08:20,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 32 transitions, 148 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-31 22:08:20,650 INFO L231 Difference]: Finished difference. Result has 37 places, 32 transitions, 110 flow [2024-10-31 22:08:20,650 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=110, PETRI_PLACES=37, PETRI_TRANSITIONS=32} [2024-10-31 22:08:20,651 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 3 predicate places. [2024-10-31 22:08:20,651 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 32 transitions, 110 flow [2024-10-31 22:08:20,651 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:08:20,651 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:08:20,652 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-10-31 22:08:20,674 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a19248b-78d3-4afb-b44f-c79f9ff1391d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-31 22:08:20,854 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a19248b-78d3-4afb-b44f-c79f9ff1391d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:08:20,859 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-10-31 22:08:20,860 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:08:20,860 INFO L85 PathProgramCache]: Analyzing trace with hash 713866407, now seen corresponding path program 1 times [2024-10-31 22:08:20,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:08:20,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802666001] [2024-10-31 22:08:20,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:08:20,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:08:20,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:08:20,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:08:20,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:08:20,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802666001] [2024-10-31 22:08:20,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802666001] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:08:20,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:08:20,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:08:20,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765840092] [2024-10-31 22:08:20,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:08:20,982 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:08:20,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:08:20,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:08:20,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:08:20,994 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-10-31 22:08:20,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 32 transitions, 110 flow. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:08:20,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:08:20,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-10-31 22:08:20,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:08:21,083 INFO L124 PetriNetUnfolderBase]: 94/176 cut-off events. [2024-10-31 22:08:21,083 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-10-31 22:08:21,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 376 conditions, 176 events. 94/176 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 635 event pairs, 68 based on Foata normal form. 0/145 useless extension candidates. Maximal degree in co-relation 338. Up to 161 conditions per place. [2024-10-31 22:08:21,085 INFO L140 encePairwiseOnDemand]: 29/33 looper letters, 23 selfloop transitions, 4 changer transitions 0/30 dead transitions. [2024-10-31 22:08:21,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 30 transitions, 160 flow [2024-10-31 22:08:21,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:08:21,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-31 22:08:21,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 51 transitions. [2024-10-31 22:08:21,087 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.38636363636363635 [2024-10-31 22:08:21,087 INFO L175 Difference]: Start difference. First operand has 37 places, 32 transitions, 110 flow. Second operand 4 states and 51 transitions. [2024-10-31 22:08:21,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 30 transitions, 160 flow [2024-10-31 22:08:21,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 30 transitions, 118 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-10-31 22:08:21,089 INFO L231 Difference]: Finished difference. Result has 31 places, 30 transitions, 72 flow [2024-10-31 22:08:21,089 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=72, PETRI_PLACES=31, PETRI_TRANSITIONS=30} [2024-10-31 22:08:21,090 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, -3 predicate places. [2024-10-31 22:08:21,090 INFO L471 AbstractCegarLoop]: Abstraction has has 31 places, 30 transitions, 72 flow [2024-10-31 22:08:21,090 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:08:21,090 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:08:21,090 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-10-31 22:08:21,091 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-31 22:08:21,091 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-10-31 22:08:21,091 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:08:21,091 INFO L85 PathProgramCache]: Analyzing trace with hash 713866408, now seen corresponding path program 1 times [2024-10-31 22:08:21,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:08:21,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109608031] [2024-10-31 22:08:21,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:08:21,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:08:21,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:08:21,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:08:21,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:08:21,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109608031] [2024-10-31 22:08:21,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109608031] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:08:21,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:08:21,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-31 22:08:21,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804272746] [2024-10-31 22:08:21,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:08:21,171 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:08:21,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:08:21,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:08:21,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:08:21,184 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-10-31 22:08:21,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 30 transitions, 72 flow. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:08:21,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:08:21,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-10-31 22:08:21,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:08:21,379 INFO L124 PetriNetUnfolderBase]: 155/293 cut-off events. [2024-10-31 22:08:21,380 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-31 22:08:21,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 596 conditions, 293 events. 155/293 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1154 event pairs, 100 based on Foata normal form. 0/247 useless extension candidates. Maximal degree in co-relation 386. Up to 195 conditions per place. [2024-10-31 22:08:21,382 INFO L140 encePairwiseOnDemand]: 27/33 looper letters, 45 selfloop transitions, 5 changer transitions 0/52 dead transitions. [2024-10-31 22:08:21,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 52 transitions, 221 flow [2024-10-31 22:08:21,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:08:21,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-31 22:08:21,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 83 transitions. [2024-10-31 22:08:21,384 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.503030303030303 [2024-10-31 22:08:21,385 INFO L175 Difference]: Start difference. First operand has 31 places, 30 transitions, 72 flow. Second operand 5 states and 83 transitions. [2024-10-31 22:08:21,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 52 transitions, 221 flow [2024-10-31 22:08:21,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 52 transitions, 216 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-31 22:08:21,387 INFO L231 Difference]: Finished difference. Result has 35 places, 32 transitions, 92 flow [2024-10-31 22:08:21,387 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=67, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=92, PETRI_PLACES=35, PETRI_TRANSITIONS=32} [2024-10-31 22:08:21,388 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 1 predicate places. [2024-10-31 22:08:21,388 INFO L471 AbstractCegarLoop]: Abstraction has has 35 places, 32 transitions, 92 flow [2024-10-31 22:08:21,389 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:08:21,389 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:08:21,389 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:08:21,389 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-31 22:08:21,389 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-10-31 22:08:21,390 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:08:21,390 INFO L85 PathProgramCache]: Analyzing trace with hash -1182568079, now seen corresponding path program 1 times [2024-10-31 22:08:21,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:08:21,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638324767] [2024-10-31 22:08:21,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:08:21,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:08:21,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:08:21,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:08:21,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:08:21,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638324767] [2024-10-31 22:08:21,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638324767] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:08:21,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:08:21,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-31 22:08:21,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97176755] [2024-10-31 22:08:21,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:08:21,490 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:08:21,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:08:21,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:08:21,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:08:21,501 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-10-31 22:08:21,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 32 transitions, 92 flow. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:08:21,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:08:21,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-10-31 22:08:21,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:08:21,660 INFO L124 PetriNetUnfolderBase]: 131/250 cut-off events. [2024-10-31 22:08:21,660 INFO L125 PetriNetUnfolderBase]: For 70/81 co-relation queries the response was YES. [2024-10-31 22:08:21,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 579 conditions, 250 events. 131/250 cut-off events. For 70/81 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 910 event pairs, 96 based on Foata normal form. 0/211 useless extension candidates. Maximal degree in co-relation 423. Up to 193 conditions per place. [2024-10-31 22:08:21,663 INFO L140 encePairwiseOnDemand]: 27/33 looper letters, 38 selfloop transitions, 5 changer transitions 0/45 dead transitions. [2024-10-31 22:08:21,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 45 transitions, 217 flow [2024-10-31 22:08:21,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:08:21,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-31 22:08:21,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 76 transitions. [2024-10-31 22:08:21,664 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.46060606060606063 [2024-10-31 22:08:21,665 INFO L175 Difference]: Start difference. First operand has 35 places, 32 transitions, 92 flow. Second operand 5 states and 76 transitions. [2024-10-31 22:08:21,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 45 transitions, 217 flow [2024-10-31 22:08:21,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 45 transitions, 212 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-31 22:08:21,668 INFO L231 Difference]: Finished difference. Result has 39 places, 34 transitions, 112 flow [2024-10-31 22:08:21,668 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=112, PETRI_PLACES=39, PETRI_TRANSITIONS=34} [2024-10-31 22:08:21,669 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 5 predicate places. [2024-10-31 22:08:21,669 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 34 transitions, 112 flow [2024-10-31 22:08:21,669 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:08:21,670 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:08:21,670 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:08:21,672 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-31 22:08:21,672 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-10-31 22:08:21,673 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:08:21,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1683764861, now seen corresponding path program 1 times [2024-10-31 22:08:21,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:08:21,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490055031] [2024-10-31 22:08:21,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:08:21,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:08:21,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:08:21,983 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:08:21,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:08:21,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490055031] [2024-10-31 22:08:21,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490055031] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:08:21,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127686662] [2024-10-31 22:08:21,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:08:21,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:08:21,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a19248b-78d3-4afb-b44f-c79f9ff1391d/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:08:21,988 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a19248b-78d3-4afb-b44f-c79f9ff1391d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:08:21,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a19248b-78d3-4afb-b44f-c79f9ff1391d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-31 22:08:22,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:08:22,067 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-31 22:08:22,069 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:08:22,170 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:08:22,171 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:08:22,237 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-10-31 22:08:22,259 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:08:22,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127686662] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:08:22,259 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:08:22,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-10-31 22:08:22,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315670672] [2024-10-31 22:08:22,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:08:22,261 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-31 22:08:22,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:08:22,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-31 22:08:22,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-10-31 22:08:22,325 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 33 [2024-10-31 22:08:22,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 34 transitions, 112 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:08:22,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:08:22,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 33 [2024-10-31 22:08:22,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:08:22,650 INFO L124 PetriNetUnfolderBase]: 161/309 cut-off events. [2024-10-31 22:08:22,650 INFO L125 PetriNetUnfolderBase]: For 107/122 co-relation queries the response was YES. [2024-10-31 22:08:22,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 768 conditions, 309 events. 161/309 cut-off events. For 107/122 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1229 event pairs, 75 based on Foata normal form. 0/275 useless extension candidates. Maximal degree in co-relation 581. Up to 143 conditions per place. [2024-10-31 22:08:22,653 INFO L140 encePairwiseOnDemand]: 25/33 looper letters, 47 selfloop transitions, 10 changer transitions 0/60 dead transitions. [2024-10-31 22:08:22,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 60 transitions, 294 flow [2024-10-31 22:08:22,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-31 22:08:22,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-31 22:08:22,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-10-31 22:08:22,655 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4805194805194805 [2024-10-31 22:08:22,655 INFO L175 Difference]: Start difference. First operand has 39 places, 34 transitions, 112 flow. Second operand 7 states and 111 transitions. [2024-10-31 22:08:22,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 60 transitions, 294 flow [2024-10-31 22:08:22,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 60 transitions, 289 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-31 22:08:22,658 INFO L231 Difference]: Finished difference. Result has 45 places, 37 transitions, 151 flow [2024-10-31 22:08:22,658 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=107, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=151, PETRI_PLACES=45, PETRI_TRANSITIONS=37} [2024-10-31 22:08:22,658 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 11 predicate places. [2024-10-31 22:08:22,659 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 37 transitions, 151 flow [2024-10-31 22:08:22,659 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:08:22,659 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:08:22,659 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:08:22,679 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a19248b-78d3-4afb-b44f-c79f9ff1391d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-31 22:08:22,860 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a19248b-78d3-4afb-b44f-c79f9ff1391d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:08:22,860 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-10-31 22:08:22,861 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:08:22,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1118057978, now seen corresponding path program 1 times [2024-10-31 22:08:22,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:08:22,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419490476] [2024-10-31 22:08:22,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:08:22,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:08:22,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:08:23,019 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:08:23,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:08:23,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419490476] [2024-10-31 22:08:23,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419490476] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:08:23,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703341530] [2024-10-31 22:08:23,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:08:23,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:08:23,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a19248b-78d3-4afb-b44f-c79f9ff1391d/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:08:23,022 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a19248b-78d3-4afb-b44f-c79f9ff1391d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:08:23,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a19248b-78d3-4afb-b44f-c79f9ff1391d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-31 22:08:23,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:08:23,101 INFO L255 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-31 22:08:23,103 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:08:23,170 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:08:23,171 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:08:23,234 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-10-31 22:08:23,245 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:08:23,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703341530] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:08:23,246 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:08:23,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2024-10-31 22:08:23,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640534560] [2024-10-31 22:08:23,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:08:23,247 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-31 22:08:23,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:08:23,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-31 22:08:23,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-10-31 22:08:23,294 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 33 [2024-10-31 22:08:23,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 37 transitions, 151 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:08:23,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:08:23,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 33 [2024-10-31 22:08:23,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:08:23,554 INFO L124 PetriNetUnfolderBase]: 224/415 cut-off events. [2024-10-31 22:08:23,554 INFO L125 PetriNetUnfolderBase]: For 457/483 co-relation queries the response was YES. [2024-10-31 22:08:23,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1204 conditions, 415 events. 224/415 cut-off events. For 457/483 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1617 event pairs, 100 based on Foata normal form. 0/395 useless extension candidates. Maximal degree in co-relation 998. Up to 206 conditions per place. [2024-10-31 22:08:23,558 INFO L140 encePairwiseOnDemand]: 25/33 looper letters, 54 selfloop transitions, 10 changer transitions 0/67 dead transitions. [2024-10-31 22:08:23,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 67 transitions, 407 flow [2024-10-31 22:08:23,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-31 22:08:23,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-31 22:08:23,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 109 transitions. [2024-10-31 22:08:23,560 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47186147186147187 [2024-10-31 22:08:23,560 INFO L175 Difference]: Start difference. First operand has 45 places, 37 transitions, 151 flow. Second operand 7 states and 109 transitions. [2024-10-31 22:08:23,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 67 transitions, 407 flow [2024-10-31 22:08:23,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 67 transitions, 390 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-10-31 22:08:23,564 INFO L231 Difference]: Finished difference. Result has 49 places, 40 transitions, 182 flow [2024-10-31 22:08:23,564 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=182, PETRI_PLACES=49, PETRI_TRANSITIONS=40} [2024-10-31 22:08:23,565 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 15 predicate places. [2024-10-31 22:08:23,566 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 40 transitions, 182 flow [2024-10-31 22:08:23,566 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:08:23,567 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:08:23,567 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:08:23,587 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a19248b-78d3-4afb-b44f-c79f9ff1391d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-31 22:08:23,767 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a19248b-78d3-4afb-b44f-c79f9ff1391d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:08:23,768 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-10-31 22:08:23,768 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:08:23,768 INFO L85 PathProgramCache]: Analyzing trace with hash 116387642, now seen corresponding path program 1 times [2024-10-31 22:08:23,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:08:23,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262221733] [2024-10-31 22:08:23,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:08:23,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:08:23,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:08:23,896 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:08:23,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:08:23,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262221733] [2024-10-31 22:08:23,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262221733] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:08:23,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054380181] [2024-10-31 22:08:23,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:08:23,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:08:23,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a19248b-78d3-4afb-b44f-c79f9ff1391d/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:08:23,900 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a19248b-78d3-4afb-b44f-c79f9ff1391d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:08:23,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a19248b-78d3-4afb-b44f-c79f9ff1391d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-31 22:08:23,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:08:23,985 INFO L255 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-31 22:08:23,987 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:08:24,091 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:08:24,092 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:08:24,191 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:08:24,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054380181] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:08:24,192 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:08:24,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-10-31 22:08:24,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490726522] [2024-10-31 22:08:24,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:08:24,193 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-31 22:08:24,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:08:24,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-31 22:08:24,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2024-10-31 22:08:24,246 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-10-31 22:08:24,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 40 transitions, 182 flow. Second operand has 14 states, 14 states have (on average 9.0) internal successors, (126), 14 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) [2024-10-31 22:08:24,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:08:24,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-10-31 22:08:24,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:08:24,633 INFO L124 PetriNetUnfolderBase]: 432/763 cut-off events. [2024-10-31 22:08:24,633 INFO L125 PetriNetUnfolderBase]: For 904/931 co-relation queries the response was YES. [2024-10-31 22:08:24,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2530 conditions, 763 events. 432/763 cut-off events. For 904/931 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 3240 event pairs, 226 based on Foata normal form. 16/778 useless extension candidates. Maximal degree in co-relation 1404. Up to 407 conditions per place. [2024-10-31 22:08:24,640 INFO L140 encePairwiseOnDemand]: 25/33 looper letters, 70 selfloop transitions, 13 changer transitions 0/85 dead transitions. [2024-10-31 22:08:24,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 85 transitions, 564 flow [2024-10-31 22:08:24,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-31 22:08:24,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-31 22:08:24,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 119 transitions. [2024-10-31 22:08:24,642 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45075757575757575 [2024-10-31 22:08:24,642 INFO L175 Difference]: Start difference. First operand has 49 places, 40 transitions, 182 flow. Second operand 8 states and 119 transitions. [2024-10-31 22:08:24,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 85 transitions, 564 flow [2024-10-31 22:08:24,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 85 transitions, 543 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-10-31 22:08:24,647 INFO L231 Difference]: Finished difference. Result has 55 places, 44 transitions, 245 flow [2024-10-31 22:08:24,647 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=169, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=245, PETRI_PLACES=55, PETRI_TRANSITIONS=44} [2024-10-31 22:08:24,648 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 21 predicate places. [2024-10-31 22:08:24,648 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 44 transitions, 245 flow [2024-10-31 22:08:24,649 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 9.0) internal successors, (126), 14 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) [2024-10-31 22:08:24,649 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:08:24,649 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:08:24,671 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a19248b-78d3-4afb-b44f-c79f9ff1391d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-10-31 22:08:24,849 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a19248b-78d3-4afb-b44f-c79f9ff1391d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-10-31 22:08:24,850 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-10-31 22:08:24,850 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:08:24,851 INFO L85 PathProgramCache]: Analyzing trace with hash -593371592, now seen corresponding path program 1 times [2024-10-31 22:08:24,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:08:24,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145958365] [2024-10-31 22:08:24,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:08:24,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:08:24,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:08:24,980 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:08:24,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:08:24,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145958365] [2024-10-31 22:08:24,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145958365] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:08:24,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574805013] [2024-10-31 22:08:24,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:08:24,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:08:24,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a19248b-78d3-4afb-b44f-c79f9ff1391d/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:08:24,984 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a19248b-78d3-4afb-b44f-c79f9ff1391d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:08:24,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a19248b-78d3-4afb-b44f-c79f9ff1391d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-31 22:08:25,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:08:25,075 INFO L255 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-31 22:08:25,076 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:08:25,178 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:08:25,178 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:08:25,276 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:08:25,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574805013] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:08:25,276 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:08:25,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-10-31 22:08:25,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316332407] [2024-10-31 22:08:25,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:08:25,281 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-31 22:08:25,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:08:25,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-31 22:08:25,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2024-10-31 22:08:25,337 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-10-31 22:08:25,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 44 transitions, 245 flow. Second operand has 14 states, 14 states have (on average 9.142857142857142) internal successors, (128), 14 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:08:25,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:08:25,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-10-31 22:08:25,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:08:25,685 INFO L124 PetriNetUnfolderBase]: 378/660 cut-off events. [2024-10-31 22:08:25,686 INFO L125 PetriNetUnfolderBase]: For 1664/1734 co-relation queries the response was YES. [2024-10-31 22:08:25,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2425 conditions, 660 events. 378/660 cut-off events. For 1664/1734 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2610 event pairs, 218 based on Foata normal form. 11/671 useless extension candidates. Maximal degree in co-relation 1436. Up to 403 conditions per place. [2024-10-31 22:08:25,692 INFO L140 encePairwiseOnDemand]: 25/33 looper letters, 59 selfloop transitions, 13 changer transitions 0/74 dead transitions. [2024-10-31 22:08:25,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 74 transitions, 565 flow [2024-10-31 22:08:25,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-31 22:08:25,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-31 22:08:25,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 114 transitions. [2024-10-31 22:08:25,694 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-10-31 22:08:25,694 INFO L175 Difference]: Start difference. First operand has 55 places, 44 transitions, 245 flow. Second operand 8 states and 114 transitions. [2024-10-31 22:08:25,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 74 transitions, 565 flow [2024-10-31 22:08:25,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 74 transitions, 541 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-10-31 22:08:25,703 INFO L231 Difference]: Finished difference. Result has 61 places, 48 transitions, 305 flow [2024-10-31 22:08:25,703 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=305, PETRI_PLACES=61, PETRI_TRANSITIONS=48} [2024-10-31 22:08:25,704 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 27 predicate places. [2024-10-31 22:08:25,705 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 48 transitions, 305 flow [2024-10-31 22:08:25,705 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 9.142857142857142) internal successors, (128), 14 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:08:25,707 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:08:25,707 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:08:25,728 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a19248b-78d3-4afb-b44f-c79f9ff1391d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-31 22:08:25,908 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a19248b-78d3-4afb-b44f-c79f9ff1391d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:08:25,909 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-10-31 22:08:25,910 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:08:25,910 INFO L85 PathProgramCache]: Analyzing trace with hash 2086425221, now seen corresponding path program 2 times [2024-10-31 22:08:25,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:08:25,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619099741] [2024-10-31 22:08:25,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:08:25,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:08:25,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:08:26,219 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:08:26,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:08:26,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619099741] [2024-10-31 22:08:26,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619099741] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:08:26,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591163756] [2024-10-31 22:08:26,220 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-31 22:08:26,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:08:26,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a19248b-78d3-4afb-b44f-c79f9ff1391d/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:08:26,223 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a19248b-78d3-4afb-b44f-c79f9ff1391d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:08:26,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a19248b-78d3-4afb-b44f-c79f9ff1391d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-31 22:08:26,314 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-31 22:08:26,314 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:08:26,316 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-10-31 22:08:26,318 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:08:26,337 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-10-31 22:08:26,813 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-31 22:08:26,813 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:08:27,223 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-31 22:08:27,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591163756] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:08:27,223 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:08:27,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 16 [2024-10-31 22:08:27,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494310769] [2024-10-31 22:08:27,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:08:27,224 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-31 22:08:27,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:08:27,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-31 22:08:27,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2024-10-31 22:08:27,501 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-10-31 22:08:27,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 48 transitions, 305 flow. Second operand has 18 states, 18 states have (on average 8.944444444444445) internal successors, (161), 18 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:08:27,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:08:27,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-10-31 22:08:27,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:08:28,954 INFO L124 PetriNetUnfolderBase]: 414/731 cut-off events. [2024-10-31 22:08:28,955 INFO L125 PetriNetUnfolderBase]: For 1885/1931 co-relation queries the response was YES. [2024-10-31 22:08:28,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2898 conditions, 731 events. 414/731 cut-off events. For 1885/1931 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 3000 event pairs, 76 based on Foata normal form. 16/746 useless extension candidates. Maximal degree in co-relation 1794. Up to 139 conditions per place. [2024-10-31 22:08:28,962 INFO L140 encePairwiseOnDemand]: 25/33 looper letters, 111 selfloop transitions, 20 changer transitions 0/133 dead transitions. [2024-10-31 22:08:28,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 133 transitions, 1036 flow [2024-10-31 22:08:28,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-31 22:08:28,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-10-31 22:08:28,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 205 transitions. [2024-10-31 22:08:28,964 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44372294372294374 [2024-10-31 22:08:28,965 INFO L175 Difference]: Start difference. First operand has 61 places, 48 transitions, 305 flow. Second operand 14 states and 205 transitions. [2024-10-31 22:08:28,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 133 transitions, 1036 flow [2024-10-31 22:08:28,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 133 transitions, 1008 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-10-31 22:08:28,972 INFO L231 Difference]: Finished difference. Result has 71 places, 50 transitions, 357 flow [2024-10-31 22:08:28,973 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=285, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=357, PETRI_PLACES=71, PETRI_TRANSITIONS=50} [2024-10-31 22:08:28,974 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 37 predicate places. [2024-10-31 22:08:28,974 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 50 transitions, 357 flow [2024-10-31 22:08:28,974 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 8.944444444444445) internal successors, (161), 18 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:08:28,975 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:08:28,975 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:08:29,005 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a19248b-78d3-4afb-b44f-c79f9ff1391d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-31 22:08:29,178 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a19248b-78d3-4afb-b44f-c79f9ff1391d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:08:29,179 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-10-31 22:08:29,180 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:08:29,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1520424275, now seen corresponding path program 1 times [2024-10-31 22:08:29,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:08:29,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128568020] [2024-10-31 22:08:29,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:08:29,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:08:29,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:08:29,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:08:29,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:08:29,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128568020] [2024-10-31 22:08:29,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128568020] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:08:29,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:08:29,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:08:29,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873210651] [2024-10-31 22:08:29,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:08:29,209 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:08:29,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:08:29,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:08:29,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:08:29,210 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 33 [2024-10-31 22:08:29,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 50 transitions, 357 flow. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:08:29,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:08:29,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 33 [2024-10-31 22:08:29,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:08:29,367 INFO L124 PetriNetUnfolderBase]: 367/702 cut-off events. [2024-10-31 22:08:29,367 INFO L125 PetriNetUnfolderBase]: For 2860/2939 co-relation queries the response was YES. [2024-10-31 22:08:29,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3009 conditions, 702 events. 367/702 cut-off events. For 2860/2939 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2990 event pairs, 106 based on Foata normal form. 3/704 useless extension candidates. Maximal degree in co-relation 1822. Up to 482 conditions per place. [2024-10-31 22:08:29,375 INFO L140 encePairwiseOnDemand]: 29/33 looper letters, 51 selfloop transitions, 3 changer transitions 6/65 dead transitions. [2024-10-31 22:08:29,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 65 transitions, 588 flow [2024-10-31 22:08:29,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:08:29,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 22:08:29,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 56 transitions. [2024-10-31 22:08:29,377 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5656565656565656 [2024-10-31 22:08:29,377 INFO L175 Difference]: Start difference. First operand has 71 places, 50 transitions, 357 flow. Second operand 3 states and 56 transitions. [2024-10-31 22:08:29,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 65 transitions, 588 flow [2024-10-31 22:08:29,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 65 transitions, 511 flow, removed 12 selfloop flow, removed 10 redundant places. [2024-10-31 22:08:29,386 INFO L231 Difference]: Finished difference. Result has 64 places, 47 transitions, 277 flow [2024-10-31 22:08:29,386 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=296, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=277, PETRI_PLACES=64, PETRI_TRANSITIONS=47} [2024-10-31 22:08:29,387 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 30 predicate places. [2024-10-31 22:08:29,387 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 47 transitions, 277 flow [2024-10-31 22:08:29,387 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:08:29,388 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:08:29,388 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:08:29,388 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-10-31 22:08:29,388 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-10-31 22:08:29,388 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:08:29,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1467835709, now seen corresponding path program 2 times [2024-10-31 22:08:29,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:08:29,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995268177] [2024-10-31 22:08:29,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:08:29,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:08:29,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:08:29,691 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:08:29,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:08:29,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995268177] [2024-10-31 22:08:29,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995268177] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:08:29,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036700975] [2024-10-31 22:08:29,692 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-31 22:08:29,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:08:29,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a19248b-78d3-4afb-b44f-c79f9ff1391d/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:08:29,696 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a19248b-78d3-4afb-b44f-c79f9ff1391d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:08:29,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a19248b-78d3-4afb-b44f-c79f9ff1391d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-31 22:08:29,786 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-31 22:08:29,786 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:08:29,788 INFO L255 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-10-31 22:08:29,790 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:08:29,802 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-10-31 22:08:30,261 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-31 22:08:30,262 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:08:30,619 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-31 22:08:30,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036700975] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:08:30,620 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:08:30,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 16 [2024-10-31 22:08:30,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959300812] [2024-10-31 22:08:30,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:08:30,621 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-31 22:08:30,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:08:30,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-31 22:08:30,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2024-10-31 22:08:30,895 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-10-31 22:08:30,895 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 47 transitions, 277 flow. Second operand has 18 states, 18 states have (on average 9.277777777777779) internal successors, (167), 18 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:08:30,895 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:08:30,896 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-10-31 22:08:30,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:08:32,244 INFO L124 PetriNetUnfolderBase]: 433/776 cut-off events. [2024-10-31 22:08:32,244 INFO L125 PetriNetUnfolderBase]: For 1980/2062 co-relation queries the response was YES. [2024-10-31 22:08:32,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3063 conditions, 776 events. 433/776 cut-off events. For 1980/2062 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 3287 event pairs, 83 based on Foata normal form. 18/792 useless extension candidates. Maximal degree in co-relation 2106. Up to 150 conditions per place. [2024-10-31 22:08:32,252 INFO L140 encePairwiseOnDemand]: 25/33 looper letters, 106 selfloop transitions, 17 changer transitions 0/127 dead transitions. [2024-10-31 22:08:32,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 127 transitions, 986 flow [2024-10-31 22:08:32,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-31 22:08:32,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-10-31 22:08:32,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 191 transitions. [2024-10-31 22:08:32,254 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4134199134199134 [2024-10-31 22:08:32,254 INFO L175 Difference]: Start difference. First operand has 64 places, 47 transitions, 277 flow. Second operand 14 states and 191 transitions. [2024-10-31 22:08:32,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 127 transitions, 986 flow [2024-10-31 22:08:32,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 127 transitions, 902 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-10-31 22:08:32,262 INFO L231 Difference]: Finished difference. Result has 70 places, 49 transitions, 304 flow [2024-10-31 22:08:32,263 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=304, PETRI_PLACES=70, PETRI_TRANSITIONS=49} [2024-10-31 22:08:32,264 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 36 predicate places. [2024-10-31 22:08:32,264 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 49 transitions, 304 flow [2024-10-31 22:08:32,265 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 9.277777777777779) internal successors, (167), 18 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:08:32,266 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:08:32,266 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:08:32,286 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a19248b-78d3-4afb-b44f-c79f9ff1391d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-10-31 22:08:32,468 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a19248b-78d3-4afb-b44f-c79f9ff1391d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:08:32,469 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-10-31 22:08:32,469 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:08:32,469 INFO L85 PathProgramCache]: Analyzing trace with hash -1096228004, now seen corresponding path program 1 times [2024-10-31 22:08:32,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:08:32,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012742362] [2024-10-31 22:08:32,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:08:32,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:08:32,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:08:32,592 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:08:32,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:08:32,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012742362] [2024-10-31 22:08:32,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012742362] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:08:32,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397987476] [2024-10-31 22:08:32,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:08:32,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:08:32,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a19248b-78d3-4afb-b44f-c79f9ff1391d/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:08:32,595 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a19248b-78d3-4afb-b44f-c79f9ff1391d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:08:32,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a19248b-78d3-4afb-b44f-c79f9ff1391d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-31 22:08:32,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:08:32,675 INFO L255 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-31 22:08:32,676 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:08:32,723 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:08:32,723 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:08:32,782 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:08:32,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397987476] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-31 22:08:32,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-10-31 22:08:32,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 10 [2024-10-31 22:08:32,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627329334] [2024-10-31 22:08:32,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:08:32,784 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:08:32,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:08:32,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:08:32,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2024-10-31 22:08:32,795 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-10-31 22:08:32,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 49 transitions, 304 flow. Second operand has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:08:32,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:08:32,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-10-31 22:08:32,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:08:32,952 INFO L124 PetriNetUnfolderBase]: 398/732 cut-off events. [2024-10-31 22:08:32,953 INFO L125 PetriNetUnfolderBase]: For 2056/2064 co-relation queries the response was YES. [2024-10-31 22:08:32,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2965 conditions, 732 events. 398/732 cut-off events. For 2056/2064 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 3035 event pairs, 154 based on Foata normal form. 34/748 useless extension candidates. Maximal degree in co-relation 2119. Up to 345 conditions per place. [2024-10-31 22:08:32,960 INFO L140 encePairwiseOnDemand]: 27/33 looper letters, 51 selfloop transitions, 9 changer transitions 0/64 dead transitions. [2024-10-31 22:08:32,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 64 transitions, 544 flow [2024-10-31 22:08:32,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:08:32,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-31 22:08:32,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 65 transitions. [2024-10-31 22:08:32,961 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3939393939393939 [2024-10-31 22:08:32,961 INFO L175 Difference]: Start difference. First operand has 70 places, 49 transitions, 304 flow. Second operand 5 states and 65 transitions. [2024-10-31 22:08:32,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 64 transitions, 544 flow [2024-10-31 22:08:32,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 64 transitions, 452 flow, removed 15 selfloop flow, removed 11 redundant places. [2024-10-31 22:08:32,967 INFO L231 Difference]: Finished difference. Result has 64 places, 48 transitions, 273 flow [2024-10-31 22:08:32,967 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=237, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=273, PETRI_PLACES=64, PETRI_TRANSITIONS=48} [2024-10-31 22:08:32,968 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 30 predicate places. [2024-10-31 22:08:32,968 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 48 transitions, 273 flow [2024-10-31 22:08:32,968 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:08:32,968 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:08:32,969 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:08:32,989 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a19248b-78d3-4afb-b44f-c79f9ff1391d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-10-31 22:08:33,169 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a19248b-78d3-4afb-b44f-c79f9ff1391d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-10-31 22:08:33,169 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-10-31 22:08:33,169 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:08:33,170 INFO L85 PathProgramCache]: Analyzing trace with hash 2049241071, now seen corresponding path program 1 times [2024-10-31 22:08:33,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:08:33,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412323762] [2024-10-31 22:08:33,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:08:33,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:08:33,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:08:33,302 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:08:33,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:08:33,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412323762] [2024-10-31 22:08:33,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412323762] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:08:33,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306183930] [2024-10-31 22:08:33,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:08:33,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:08:33,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a19248b-78d3-4afb-b44f-c79f9ff1391d/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:08:33,305 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a19248b-78d3-4afb-b44f-c79f9ff1391d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:08:33,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a19248b-78d3-4afb-b44f-c79f9ff1391d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-31 22:08:33,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:08:33,385 INFO L255 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-31 22:08:33,386 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:08:33,439 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:08:33,439 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:08:33,493 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:08:33,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306183930] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-31 22:08:33,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-10-31 22:08:33,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 10 [2024-10-31 22:08:33,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561220574] [2024-10-31 22:08:33,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:08:33,494 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:08:33,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:08:33,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:08:33,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2024-10-31 22:08:33,504 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-10-31 22:08:33,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 48 transitions, 273 flow. Second operand has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:08:33,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:08:33,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-10-31 22:08:33,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:08:33,646 INFO L124 PetriNetUnfolderBase]: 350/660 cut-off events. [2024-10-31 22:08:33,646 INFO L125 PetriNetUnfolderBase]: For 1650/1666 co-relation queries the response was YES. [2024-10-31 22:08:33,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2489 conditions, 660 events. 350/660 cut-off events. For 1650/1666 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 2851 event pairs, 145 based on Foata normal form. 31/671 useless extension candidates. Maximal degree in co-relation 1848. Up to 330 conditions per place. [2024-10-31 22:08:33,652 INFO L140 encePairwiseOnDemand]: 27/33 looper letters, 46 selfloop transitions, 9 changer transitions 0/60 dead transitions. [2024-10-31 22:08:33,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 60 transitions, 465 flow [2024-10-31 22:08:33,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:08:33,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-31 22:08:33,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 64 transitions. [2024-10-31 22:08:33,654 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3878787878787879 [2024-10-31 22:08:33,654 INFO L175 Difference]: Start difference. First operand has 64 places, 48 transitions, 273 flow. Second operand 5 states and 64 transitions. [2024-10-31 22:08:33,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 60 transitions, 465 flow [2024-10-31 22:08:33,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 60 transitions, 444 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-10-31 22:08:33,661 INFO L231 Difference]: Finished difference. Result has 66 places, 47 transitions, 280 flow [2024-10-31 22:08:33,661 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=280, PETRI_PLACES=66, PETRI_TRANSITIONS=47} [2024-10-31 22:08:33,662 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 32 predicate places. [2024-10-31 22:08:33,662 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 47 transitions, 280 flow [2024-10-31 22:08:33,662 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:08:33,662 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:08:33,662 INFO L204 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] [2024-10-31 22:08:33,684 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a19248b-78d3-4afb-b44f-c79f9ff1391d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-10-31 22:08:33,863 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a19248b-78d3-4afb-b44f-c79f9ff1391d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-10-31 22:08:33,863 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-10-31 22:08:33,863 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:08:33,863 INFO L85 PathProgramCache]: Analyzing trace with hash 2032299139, now seen corresponding path program 1 times [2024-10-31 22:08:33,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:08:33,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292414487] [2024-10-31 22:08:33,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:08:33,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:08:33,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:08:34,228 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:08:34,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:08:34,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292414487] [2024-10-31 22:08:34,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292414487] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:08:34,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606586480] [2024-10-31 22:08:34,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:08:34,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:08:34,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a19248b-78d3-4afb-b44f-c79f9ff1391d/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:08:34,231 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a19248b-78d3-4afb-b44f-c79f9ff1391d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:08:34,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a19248b-78d3-4afb-b44f-c79f9ff1391d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-31 22:08:34,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:08:34,317 INFO L255 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-31 22:08:34,319 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:08:34,383 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:08:34,384 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:08:34,431 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-31 22:08:34,431 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 14 [2024-10-31 22:08:34,452 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:08:34,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606586480] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:08:34,452 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:08:34,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 12 [2024-10-31 22:08:34,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020478237] [2024-10-31 22:08:34,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:08:34,453 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-31 22:08:34,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:08:34,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-31 22:08:34,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2024-10-31 22:08:34,505 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 33 [2024-10-31 22:08:34,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 47 transitions, 280 flow. Second operand has 13 states, 13 states have (on average 10.692307692307692) internal successors, (139), 13 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:08:34,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:08:34,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 33 [2024-10-31 22:08:34,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:08:34,972 INFO L124 PetriNetUnfolderBase]: 395/811 cut-off events. [2024-10-31 22:08:34,972 INFO L125 PetriNetUnfolderBase]: For 1979/2017 co-relation queries the response was YES. [2024-10-31 22:08:34,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3131 conditions, 811 events. 395/811 cut-off events. For 1979/2017 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 4038 event pairs, 56 based on Foata normal form. 16/825 useless extension candidates. Maximal degree in co-relation 2324. Up to 425 conditions per place. [2024-10-31 22:08:34,980 INFO L140 encePairwiseOnDemand]: 24/33 looper letters, 64 selfloop transitions, 31 changer transitions 16/120 dead transitions. [2024-10-31 22:08:34,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 120 transitions, 918 flow [2024-10-31 22:08:34,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-31 22:08:34,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-10-31 22:08:34,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 164 transitions. [2024-10-31 22:08:34,983 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45179063360881544 [2024-10-31 22:08:34,983 INFO L175 Difference]: Start difference. First operand has 66 places, 47 transitions, 280 flow. Second operand 11 states and 164 transitions. [2024-10-31 22:08:34,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 120 transitions, 918 flow [2024-10-31 22:08:34,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 120 transitions, 889 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-10-31 22:08:34,990 INFO L231 Difference]: Finished difference. Result has 80 places, 74 transitions, 590 flow [2024-10-31 22:08:34,991 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=590, PETRI_PLACES=80, PETRI_TRANSITIONS=74} [2024-10-31 22:08:34,992 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 46 predicate places. [2024-10-31 22:08:34,993 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 74 transitions, 590 flow [2024-10-31 22:08:34,993 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.692307692307692) internal successors, (139), 13 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:08:34,993 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:08:34,994 INFO L204 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] [2024-10-31 22:08:35,015 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a19248b-78d3-4afb-b44f-c79f9ff1391d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-10-31 22:08:35,194 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a19248b-78d3-4afb-b44f-c79f9ff1391d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-10-31 22:08:35,194 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-10-31 22:08:35,195 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:08:35,195 INFO L85 PathProgramCache]: Analyzing trace with hash -728470975, now seen corresponding path program 2 times [2024-10-31 22:08:35,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:08:35,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786521894] [2024-10-31 22:08:35,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:08:35,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:08:35,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:08:35,494 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:08:35,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:08:35,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786521894] [2024-10-31 22:08:35,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786521894] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:08:35,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687282603] [2024-10-31 22:08:35,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-31 22:08:35,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:08:35,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a19248b-78d3-4afb-b44f-c79f9ff1391d/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:08:35,497 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a19248b-78d3-4afb-b44f-c79f9ff1391d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:08:35,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a19248b-78d3-4afb-b44f-c79f9ff1391d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-31 22:08:35,590 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-31 22:08:35,590 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:08:35,591 INFO L255 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-31 22:08:35,593 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:08:35,686 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:08:35,687 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:08:35,716 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-31 22:08:35,717 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 21 treesize of output 14 [2024-10-31 22:08:35,758 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:08:35,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687282603] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:08:35,759 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:08:35,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 12 [2024-10-31 22:08:35,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710824548] [2024-10-31 22:08:35,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:08:35,760 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-31 22:08:35,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:08:35,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-31 22:08:35,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2024-10-31 22:08:35,818 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 33 [2024-10-31 22:08:35,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 74 transitions, 590 flow. Second operand has 13 states, 13 states have (on average 10.846153846153847) internal successors, (141), 13 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:08:35,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:08:35,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 33 [2024-10-31 22:08:35,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:08:36,230 INFO L124 PetriNetUnfolderBase]: 401/834 cut-off events. [2024-10-31 22:08:36,230 INFO L125 PetriNetUnfolderBase]: For 2854/2899 co-relation queries the response was YES. [2024-10-31 22:08:36,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3590 conditions, 834 events. 401/834 cut-off events. For 2854/2899 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 4224 event pairs, 96 based on Foata normal form. 20/852 useless extension candidates. Maximal degree in co-relation 3175. Up to 568 conditions per place. [2024-10-31 22:08:36,239 INFO L140 encePairwiseOnDemand]: 24/33 looper letters, 68 selfloop transitions, 25 changer transitions 11/113 dead transitions. [2024-10-31 22:08:36,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 113 transitions, 1060 flow [2024-10-31 22:08:36,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-31 22:08:36,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-10-31 22:08:36,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 145 transitions. [2024-10-31 22:08:36,240 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.39944903581267216 [2024-10-31 22:08:36,241 INFO L175 Difference]: Start difference. First operand has 80 places, 74 transitions, 590 flow. Second operand 11 states and 145 transitions. [2024-10-31 22:08:36,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 113 transitions, 1060 flow [2024-10-31 22:08:36,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 113 transitions, 1037 flow, removed 10 selfloop flow, removed 1 redundant places. [2024-10-31 22:08:36,252 INFO L231 Difference]: Finished difference. Result has 95 places, 84 transitions, 760 flow [2024-10-31 22:08:36,252 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=569, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=760, PETRI_PLACES=95, PETRI_TRANSITIONS=84} [2024-10-31 22:08:36,253 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 61 predicate places. [2024-10-31 22:08:36,253 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 84 transitions, 760 flow [2024-10-31 22:08:36,253 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.846153846153847) internal successors, (141), 13 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:08:36,253 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:08:36,253 INFO L204 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] [2024-10-31 22:08:36,274 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a19248b-78d3-4afb-b44f-c79f9ff1391d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-10-31 22:08:36,454 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a19248b-78d3-4afb-b44f-c79f9ff1391d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-10-31 22:08:36,454 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-10-31 22:08:36,455 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:08:36,455 INFO L85 PathProgramCache]: Analyzing trace with hash -1229334769, now seen corresponding path program 3 times [2024-10-31 22:08:36,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:08:36,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128637185] [2024-10-31 22:08:36,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:08:36,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:08:36,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:08:36,881 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:08:36,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:08:36,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128637185] [2024-10-31 22:08:36,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128637185] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:08:36,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200217206] [2024-10-31 22:08:36,882 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-31 22:08:36,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:08:36,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a19248b-78d3-4afb-b44f-c79f9ff1391d/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:08:36,885 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a19248b-78d3-4afb-b44f-c79f9ff1391d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:08:36,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a19248b-78d3-4afb-b44f-c79f9ff1391d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-31 22:08:36,981 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-31 22:08:36,981 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:08:36,983 INFO L255 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-31 22:08:36,988 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:08:37,095 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:08:37,095 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:08:37,136 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-31 22:08:37,137 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 21 treesize of output 14 [2024-10-31 22:08:37,189 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:08:37,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200217206] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:08:37,190 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:08:37,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 13 [2024-10-31 22:08:37,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570106032] [2024-10-31 22:08:37,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:08:37,191 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-31 22:08:37,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:08:37,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-31 22:08:37,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2024-10-31 22:08:37,319 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 33 [2024-10-31 22:08:37,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 84 transitions, 760 flow. Second operand has 14 states, 14 states have (on average 10.571428571428571) internal successors, (148), 14 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:08:37,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:08:37,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 33 [2024-10-31 22:08:37,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:08:37,873 INFO L124 PetriNetUnfolderBase]: 433/899 cut-off events. [2024-10-31 22:08:37,873 INFO L125 PetriNetUnfolderBase]: For 4127/4175 co-relation queries the response was YES. [2024-10-31 22:08:37,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4135 conditions, 899 events. 433/899 cut-off events. For 4127/4175 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 4718 event pairs, 125 based on Foata normal form. 16/914 useless extension candidates. Maximal degree in co-relation 3706. Up to 626 conditions per place. [2024-10-31 22:08:37,910 INFO L140 encePairwiseOnDemand]: 24/33 looper letters, 75 selfloop transitions, 23 changer transitions 12/119 dead transitions. [2024-10-31 22:08:37,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 119 transitions, 1241 flow [2024-10-31 22:08:37,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-31 22:08:37,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-31 22:08:37,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 116 transitions. [2024-10-31 22:08:37,912 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4393939393939394 [2024-10-31 22:08:37,912 INFO L175 Difference]: Start difference. First operand has 95 places, 84 transitions, 760 flow. Second operand 8 states and 116 transitions. [2024-10-31 22:08:37,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 119 transitions, 1241 flow [2024-10-31 22:08:37,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 119 transitions, 1193 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-10-31 22:08:37,926 INFO L231 Difference]: Finished difference. Result has 102 places, 92 transitions, 881 flow [2024-10-31 22:08:37,927 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=718, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=881, PETRI_PLACES=102, PETRI_TRANSITIONS=92} [2024-10-31 22:08:37,927 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 68 predicate places. [2024-10-31 22:08:37,927 INFO L471 AbstractCegarLoop]: Abstraction has has 102 places, 92 transitions, 881 flow [2024-10-31 22:08:37,928 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 10.571428571428571) internal successors, (148), 14 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:08:37,928 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:08:37,928 INFO L204 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] [2024-10-31 22:08:37,948 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a19248b-78d3-4afb-b44f-c79f9ff1391d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-10-31 22:08:38,132 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a19248b-78d3-4afb-b44f-c79f9ff1391d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-10-31 22:08:38,133 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-10-31 22:08:38,133 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:08:38,133 INFO L85 PathProgramCache]: Analyzing trace with hash 437350649, now seen corresponding path program 4 times [2024-10-31 22:08:38,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:08:38,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513340208] [2024-10-31 22:08:38,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:08:38,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:08:38,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:08:38,527 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:08:38,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:08:38,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513340208] [2024-10-31 22:08:38,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513340208] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:08:38,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648084736] [2024-10-31 22:08:38,528 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-31 22:08:38,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:08:38,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a19248b-78d3-4afb-b44f-c79f9ff1391d/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:08:38,529 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a19248b-78d3-4afb-b44f-c79f9ff1391d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:08:38,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a19248b-78d3-4afb-b44f-c79f9ff1391d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-31 22:08:38,610 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-31 22:08:38,610 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:08:38,612 INFO L255 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-31 22:08:38,613 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:08:38,720 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:08:38,721 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:08:38,763 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-31 22:08:38,763 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 21 treesize of output 14 [2024-10-31 22:08:38,805 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:08:38,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648084736] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:08:38,806 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:08:38,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 13 [2024-10-31 22:08:38,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828204106] [2024-10-31 22:08:38,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:08:38,806 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-31 22:08:38,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:08:38,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-31 22:08:38,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2024-10-31 22:08:38,982 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 33 [2024-10-31 22:08:38,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 92 transitions, 881 flow. Second operand has 14 states, 14 states have (on average 10.571428571428571) internal successors, (148), 14 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:08:38,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:08:38,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 33 [2024-10-31 22:08:38,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:08:39,518 INFO L124 PetriNetUnfolderBase]: 461/945 cut-off events. [2024-10-31 22:08:39,518 INFO L125 PetriNetUnfolderBase]: For 5582/5638 co-relation queries the response was YES. [2024-10-31 22:08:39,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4655 conditions, 945 events. 461/945 cut-off events. For 5582/5638 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 5046 event pairs, 136 based on Foata normal form. 16/961 useless extension candidates. Maximal degree in co-relation 4197. Up to 678 conditions per place. [2024-10-31 22:08:39,530 INFO L140 encePairwiseOnDemand]: 24/33 looper letters, 83 selfloop transitions, 23 changer transitions 11/126 dead transitions. [2024-10-31 22:08:39,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 126 transitions, 1416 flow [2024-10-31 22:08:39,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-31 22:08:39,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-31 22:08:39,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 115 transitions. [2024-10-31 22:08:39,531 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4356060606060606 [2024-10-31 22:08:39,531 INFO L175 Difference]: Start difference. First operand has 102 places, 92 transitions, 881 flow. Second operand 8 states and 115 transitions. [2024-10-31 22:08:39,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 126 transitions, 1416 flow [2024-10-31 22:08:39,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 126 transitions, 1371 flow, removed 19 selfloop flow, removed 2 redundant places. [2024-10-31 22:08:39,551 INFO L231 Difference]: Finished difference. Result has 111 places, 101 transitions, 1044 flow [2024-10-31 22:08:39,551 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=846, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1044, PETRI_PLACES=111, PETRI_TRANSITIONS=101} [2024-10-31 22:08:39,552 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 77 predicate places. [2024-10-31 22:08:39,552 INFO L471 AbstractCegarLoop]: Abstraction has has 111 places, 101 transitions, 1044 flow [2024-10-31 22:08:39,552 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 10.571428571428571) internal successors, (148), 14 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:08:39,552 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:08:39,552 INFO L204 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] [2024-10-31 22:08:39,572 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a19248b-78d3-4afb-b44f-c79f9ff1391d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-10-31 22:08:39,756 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a19248b-78d3-4afb-b44f-c79f9ff1391d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:08:39,757 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-10-31 22:08:39,757 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:08:39,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1731508435, now seen corresponding path program 5 times [2024-10-31 22:08:39,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:08:39,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267898515] [2024-10-31 22:08:39,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:08:39,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:08:39,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:08:40,083 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:08:40,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:08:40,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267898515] [2024-10-31 22:08:40,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267898515] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:08:40,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671590519] [2024-10-31 22:08:40,084 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-31 22:08:40,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:08:40,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a19248b-78d3-4afb-b44f-c79f9ff1391d/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:08:40,086 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a19248b-78d3-4afb-b44f-c79f9ff1391d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:08:40,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a19248b-78d3-4afb-b44f-c79f9ff1391d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-10-31 22:08:40,174 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-31 22:08:40,174 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:08:40,175 INFO L255 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-31 22:08:40,177 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:08:40,283 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:08:40,284 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:08:40,339 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-31 22:08:40,339 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 14 [2024-10-31 22:08:40,373 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:08:40,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671590519] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:08:40,374 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:08:40,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 12 [2024-10-31 22:08:40,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510656216] [2024-10-31 22:08:40,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:08:40,375 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-31 22:08:40,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:08:40,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-31 22:08:40,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2024-10-31 22:08:40,426 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 33 [2024-10-31 22:08:40,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 101 transitions, 1044 flow. Second operand has 13 states, 13 states have (on average 10.615384615384615) internal successors, (138), 13 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:08:40,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:08:40,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 33 [2024-10-31 22:08:40,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:08:40,756 INFO L124 PetriNetUnfolderBase]: 432/885 cut-off events. [2024-10-31 22:08:40,756 INFO L125 PetriNetUnfolderBase]: For 5936/5991 co-relation queries the response was YES. [2024-10-31 22:08:40,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4568 conditions, 885 events. 432/885 cut-off events. For 5936/5991 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 4633 event pairs, 82 based on Foata normal form. 16/901 useless extension candidates. Maximal degree in co-relation 4097. Up to 578 conditions per place. [2024-10-31 22:08:40,767 INFO L140 encePairwiseOnDemand]: 25/33 looper letters, 84 selfloop transitions, 30 changer transitions 17/138 dead transitions. [2024-10-31 22:08:40,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 138 transitions, 1640 flow [2024-10-31 22:08:40,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-31 22:08:40,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-31 22:08:40,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 128 transitions. [2024-10-31 22:08:40,789 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.43097643097643096 [2024-10-31 22:08:40,789 INFO L175 Difference]: Start difference. First operand has 111 places, 101 transitions, 1044 flow. Second operand 9 states and 128 transitions. [2024-10-31 22:08:40,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 138 transitions, 1640 flow [2024-10-31 22:08:40,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 138 transitions, 1562 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-10-31 22:08:40,823 INFO L231 Difference]: Finished difference. Result has 116 places, 104 transitions, 1114 flow [2024-10-31 22:08:40,823 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=976, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1114, PETRI_PLACES=116, PETRI_TRANSITIONS=104} [2024-10-31 22:08:40,824 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 82 predicate places. [2024-10-31 22:08:40,824 INFO L471 AbstractCegarLoop]: Abstraction has has 116 places, 104 transitions, 1114 flow [2024-10-31 22:08:40,824 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.615384615384615) internal successors, (138), 13 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:08:40,825 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:08:40,825 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:08:40,842 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a19248b-78d3-4afb-b44f-c79f9ff1391d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-10-31 22:08:41,025 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a19248b-78d3-4afb-b44f-c79f9ff1391d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:08:41,026 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-10-31 22:08:41,026 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:08:41,026 INFO L85 PathProgramCache]: Analyzing trace with hash -1656040024, now seen corresponding path program 6 times [2024-10-31 22:08:41,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:08:41,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045207101] [2024-10-31 22:08:41,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:08:41,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:08:41,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:08:41,159 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-31 22:08:41,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:08:41,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045207101] [2024-10-31 22:08:41,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045207101] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:08:41,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153163400] [2024-10-31 22:08:41,160 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-31 22:08:41,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:08:41,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a19248b-78d3-4afb-b44f-c79f9ff1391d/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:08:41,164 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a19248b-78d3-4afb-b44f-c79f9ff1391d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:08:41,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a19248b-78d3-4afb-b44f-c79f9ff1391d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-10-31 22:08:41,256 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-10-31 22:08:41,256 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:08:41,258 INFO L255 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-31 22:08:41,259 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:08:41,346 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-31 22:08:41,346 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:08:41,429 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-31 22:08:41,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153163400] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:08:41,429 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:08:41,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-10-31 22:08:41,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657122970] [2024-10-31 22:08:41,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:08:41,430 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-31 22:08:41,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:08:41,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-31 22:08:41,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2024-10-31 22:08:41,482 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-10-31 22:08:41,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 104 transitions, 1114 flow. Second operand has 14 states, 14 states have (on average 9.785714285714286) internal successors, (137), 14 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:08:41,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:08:41,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-10-31 22:08:41,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:08:41,814 INFO L124 PetriNetUnfolderBase]: 473/863 cut-off events. [2024-10-31 22:08:41,814 INFO L125 PetriNetUnfolderBase]: For 6133/6173 co-relation queries the response was YES. [2024-10-31 22:08:41,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4685 conditions, 863 events. 473/863 cut-off events. For 6133/6173 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 4012 event pairs, 79 based on Foata normal form. 57/919 useless extension candidates. Maximal degree in co-relation 4622. Up to 316 conditions per place. [2024-10-31 22:08:41,824 INFO L140 encePairwiseOnDemand]: 25/33 looper letters, 110 selfloop transitions, 22 changer transitions 0/136 dead transitions. [2024-10-31 22:08:41,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 136 transitions, 1661 flow [2024-10-31 22:08:41,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-31 22:08:41,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-31 22:08:41,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 114 transitions. [2024-10-31 22:08:41,826 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3838383838383838 [2024-10-31 22:08:41,826 INFO L175 Difference]: Start difference. First operand has 116 places, 104 transitions, 1114 flow. Second operand 9 states and 114 transitions. [2024-10-31 22:08:41,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 136 transitions, 1661 flow [2024-10-31 22:08:41,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 136 transitions, 1496 flow, removed 45 selfloop flow, removed 13 redundant places. [2024-10-31 22:08:41,847 INFO L231 Difference]: Finished difference. Result has 102 places, 104 transitions, 1019 flow [2024-10-31 22:08:41,847 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=966, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1019, PETRI_PLACES=102, PETRI_TRANSITIONS=104} [2024-10-31 22:08:41,847 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 68 predicate places. [2024-10-31 22:08:41,848 INFO L471 AbstractCegarLoop]: Abstraction has has 102 places, 104 transitions, 1019 flow [2024-10-31 22:08:41,848 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 9.785714285714286) internal successors, (137), 14 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:08:41,848 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:08:41,848 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:08:41,863 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a19248b-78d3-4afb-b44f-c79f9ff1391d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-10-31 22:08:42,052 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a19248b-78d3-4afb-b44f-c79f9ff1391d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:08:42,053 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-10-31 22:08:42,053 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:08:42,053 INFO L85 PathProgramCache]: Analyzing trace with hash 2108441823, now seen corresponding path program 7 times [2024-10-31 22:08:42,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:08:42,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981476485] [2024-10-31 22:08:42,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:08:42,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:08:42,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:08:42,211 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-31 22:08:42,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:08:42,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981476485] [2024-10-31 22:08:42,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981476485] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:08:42,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857886057] [2024-10-31 22:08:42,212 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-31 22:08:42,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:08:42,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a19248b-78d3-4afb-b44f-c79f9ff1391d/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:08:42,214 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a19248b-78d3-4afb-b44f-c79f9ff1391d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:08:42,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a19248b-78d3-4afb-b44f-c79f9ff1391d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-10-31 22:08:42,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:08:42,306 INFO L255 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-31 22:08:42,308 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:08:42,409 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-31 22:08:42,409 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:08:42,510 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-31 22:08:42,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857886057] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:08:42,511 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:08:42,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2024-10-31 22:08:42,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441302824] [2024-10-31 22:08:42,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:08:42,512 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-31 22:08:42,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:08:42,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-31 22:08:42,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2024-10-31 22:08:42,562 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-10-31 22:08:42,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 104 transitions, 1019 flow. Second operand has 15 states, 15 states have (on average 9.933333333333334) internal successors, (149), 15 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:08:42,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:08:42,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-10-31 22:08:42,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:08:42,860 INFO L124 PetriNetUnfolderBase]: 410/741 cut-off events. [2024-10-31 22:08:42,860 INFO L125 PetriNetUnfolderBase]: For 4985/4985 co-relation queries the response was YES. [2024-10-31 22:08:42,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3924 conditions, 741 events. 410/741 cut-off events. For 4985/4985 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 3266 event pairs, 67 based on Foata normal form. 39/779 useless extension candidates. Maximal degree in co-relation 3868. Up to 258 conditions per place. [2024-10-31 22:08:42,874 INFO L140 encePairwiseOnDemand]: 25/33 looper letters, 105 selfloop transitions, 24 changer transitions 0/133 dead transitions. [2024-10-31 22:08:42,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 133 transitions, 1564 flow [2024-10-31 22:08:42,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-31 22:08:42,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-31 22:08:42,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 111 transitions. [2024-10-31 22:08:42,877 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.37373737373737376 [2024-10-31 22:08:42,877 INFO L175 Difference]: Start difference. First operand has 102 places, 104 transitions, 1019 flow. Second operand 9 states and 111 transitions. [2024-10-31 22:08:42,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 133 transitions, 1564 flow [2024-10-31 22:08:42,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 133 transitions, 1505 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-10-31 22:08:42,893 INFO L231 Difference]: Finished difference. Result has 102 places, 104 transitions, 1027 flow [2024-10-31 22:08:42,893 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=970, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1027, PETRI_PLACES=102, PETRI_TRANSITIONS=104} [2024-10-31 22:08:42,894 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 68 predicate places. [2024-10-31 22:08:42,894 INFO L471 AbstractCegarLoop]: Abstraction has has 102 places, 104 transitions, 1027 flow [2024-10-31 22:08:42,894 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 9.933333333333334) internal successors, (149), 15 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:08:42,895 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:08:42,895 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:08:42,915 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a19248b-78d3-4afb-b44f-c79f9ff1391d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-10-31 22:08:43,095 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a19248b-78d3-4afb-b44f-c79f9ff1391d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:08:43,095 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-10-31 22:08:43,096 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:08:43,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1311431665, now seen corresponding path program 8 times [2024-10-31 22:08:43,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:08:43,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409741044] [2024-10-31 22:08:43,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:08:43,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:08:43,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat