./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-more-vector-add.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a0165632 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_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-vector-add.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX --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 63e73d2abe89b782ca9e5c579baa72b5461ffc3c60c322f6f03d18cdd5548702 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-08 16:06:23,828 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-08 16:06:23,908 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-08 16:06:23,913 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-08 16:06:23,913 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-08 16:06:23,951 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-08 16:06:23,956 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-08 16:06:23,956 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-08 16:06:23,957 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-08 16:06:23,957 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-08 16:06:23,957 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-08 16:06:23,958 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-08 16:06:23,958 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-08 16:06:23,963 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-08 16:06:23,963 INFO L153 SettingsManager]: * Use SBE=true [2024-11-08 16:06:23,964 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-08 16:06:23,964 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-08 16:06:23,964 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-08 16:06:23,965 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-08 16:06:23,965 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-08 16:06:23,965 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-08 16:06:23,969 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-08 16:06:23,969 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-08 16:06:23,969 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-08 16:06:23,970 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-08 16:06:23,970 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-08 16:06:23,970 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-08 16:06:23,971 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-08 16:06:23,971 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-08 16:06:23,971 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-08 16:06:23,971 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-08 16:06:23,972 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-08 16:06:23,972 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-08 16:06:23,972 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 16:06:23,972 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-08 16:06:23,975 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-08 16:06:23,976 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-08 16:06:23,976 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-08 16:06:23,976 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-08 16:06:23,976 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-08 16:06:23,976 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-08 16:06:23,977 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-08 16:06:23,977 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_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 63e73d2abe89b782ca9e5c579baa72b5461ffc3c60c322f6f03d18cdd5548702 [2024-11-08 16:06:24,276 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-08 16:06:24,306 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-08 16:06:24,309 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-08 16:06:24,310 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-08 16:06:24,311 INFO L274 PluginConnector]: CDTParser initialized [2024-11-08 16:06:24,312 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/../../sv-benchmarks/c/weaver/popl20-more-vector-add.wvr.c Unable to find full path for "g++" [2024-11-08 16:06:26,356 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-08 16:06:26,565 INFO L384 CDTParser]: Found 1 translation units. [2024-11-08 16:06:26,566 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/sv-benchmarks/c/weaver/popl20-more-vector-add.wvr.c [2024-11-08 16:06:26,574 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/data/d26acba75/c20aac865ecf4e1f870f034ef30aa0d1/FLAG94d2dd104 [2024-11-08 16:06:26,590 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/data/d26acba75/c20aac865ecf4e1f870f034ef30aa0d1 [2024-11-08 16:06:26,592 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-08 16:06:26,594 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-08 16:06:26,595 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-08 16:06:26,596 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-08 16:06:26,602 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-08 16:06:26,603 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 04:06:26" (1/1) ... [2024-11-08 16:06:26,604 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f5797bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:06:26, skipping insertion in model container [2024-11-08 16:06:26,604 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 04:06:26" (1/1) ... [2024-11-08 16:06:26,630 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-08 16:06:26,898 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-08 16:06:26,900 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 16:06:26,909 INFO L200 MainTranslator]: Completed pre-run [2024-11-08 16:06:26,936 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 16:06:26,954 INFO L204 MainTranslator]: Completed translation [2024-11-08 16:06:26,955 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:06:26 WrapperNode [2024-11-08 16:06:26,955 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-08 16:06:26,956 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-08 16:06:26,956 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-08 16:06:26,956 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-08 16:06:26,964 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:06:26" (1/1) ... [2024-11-08 16:06:26,972 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:06:26" (1/1) ... [2024-11-08 16:06:27,002 INFO L138 Inliner]: procedures = 24, calls = 32, calls flagged for inlining = 12, calls inlined = 18, statements flattened = 183 [2024-11-08 16:06:27,003 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-08 16:06:27,003 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-08 16:06:27,004 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-08 16:06:27,004 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-08 16:06:27,015 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:06:26" (1/1) ... [2024-11-08 16:06:27,015 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:06:26" (1/1) ... [2024-11-08 16:06:27,019 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:06:26" (1/1) ... [2024-11-08 16:06:27,034 INFO L175 MemorySlicer]: Split 17 memory accesses to 2 slices as follows [2, 15]. 88 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 7 writes are split as follows [0, 7]. [2024-11-08 16:06:27,034 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:06:26" (1/1) ... [2024-11-08 16:06:27,035 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:06:26" (1/1) ... [2024-11-08 16:06:27,043 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:06:26" (1/1) ... [2024-11-08 16:06:27,048 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:06:26" (1/1) ... [2024-11-08 16:06:27,050 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:06:26" (1/1) ... [2024-11-08 16:06:27,051 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:06:26" (1/1) ... [2024-11-08 16:06:27,055 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-08 16:06:27,056 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-08 16:06:27,056 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-08 16:06:27,056 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-08 16:06:27,057 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:06:26" (1/1) ... [2024-11-08 16:06:27,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 16:06:27,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:06:27,093 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-08 16:06:27,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-08 16:06:27,122 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-08 16:06:27,122 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-08 16:06:27,122 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-08 16:06:27,122 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-08 16:06:27,122 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-08 16:06:27,122 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-08 16:06:27,123 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-08 16:06:27,123 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-08 16:06:27,123 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-08 16:06:27,123 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-08 16:06:27,123 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-08 16:06:27,123 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-08 16:06:27,123 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-08 16:06:27,124 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-08 16:06:27,124 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-08 16:06:27,124 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-08 16:06:27,125 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-08 16:06:27,240 INFO L238 CfgBuilder]: Building ICFG [2024-11-08 16:06:27,243 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-08 16:06:27,837 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-08 16:06:27,838 INFO L287 CfgBuilder]: Performing block encoding [2024-11-08 16:06:28,136 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-08 16:06:28,136 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-08 16:06:28,137 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 04:06:28 BoogieIcfgContainer [2024-11-08 16:06:28,137 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-08 16:06:28,140 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-08 16:06:28,141 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-08 16:06:28,144 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-08 16:06:28,145 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.11 04:06:26" (1/3) ... [2024-11-08 16:06:28,147 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7236e088 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 04:06:28, skipping insertion in model container [2024-11-08 16:06:28,148 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:06:26" (2/3) ... [2024-11-08 16:06:28,148 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7236e088 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 04:06:28, skipping insertion in model container [2024-11-08 16:06:28,149 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 04:06:28" (3/3) ... [2024-11-08 16:06:28,150 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-vector-add.wvr.c [2024-11-08 16:06:28,171 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-08 16:06:28,171 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 32 error locations. [2024-11-08 16:06:28,171 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-08 16:06:28,372 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-08 16:06:28,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 97 places, 101 transitions, 223 flow [2024-11-08 16:06:28,476 INFO L124 PetriNetUnfolderBase]: 14/98 cut-off events. [2024-11-08 16:06:28,476 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-08 16:06:28,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111 conditions, 98 events. 14/98 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 258 event pairs, 0 based on Foata normal form. 0/52 useless extension candidates. Maximal degree in co-relation 71. Up to 2 conditions per place. [2024-11-08 16:06:28,484 INFO L82 GeneralOperation]: Start removeDead. Operand has 97 places, 101 transitions, 223 flow [2024-11-08 16:06:28,490 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 93 places, 97 transitions, 212 flow [2024-11-08 16:06:28,504 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-08 16:06:28,519 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;@4639832d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-08 16:06:28,519 INFO L334 AbstractCegarLoop]: Starting to check reachability of 53 error locations. [2024-11-08 16:06:28,523 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-08 16:06:28,523 INFO L124 PetriNetUnfolderBase]: 3/10 cut-off events. [2024-11-08 16:06:28,524 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-08 16:06:28,524 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:06:28,525 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-08 16:06:28,525 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2024-11-08 16:06:28,530 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:06:28,532 INFO L85 PathProgramCache]: Analyzing trace with hash 23203177, now seen corresponding path program 1 times [2024-11-08 16:06:28,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:06:28,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749593439] [2024-11-08 16:06:28,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:06:28,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:06:28,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:06:28,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:06:28,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:06:28,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749593439] [2024-11-08 16:06:28,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749593439] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:06:28,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:06:28,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-08 16:06:28,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986413117] [2024-11-08 16:06:28,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:06:28,875 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 16:06:28,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:06:28,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 16:06:28,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 16:06:28,997 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 101 [2024-11-08 16:06:29,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 97 transitions, 212 flow. Second operand has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:06:29,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:06:29,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 101 [2024-11-08 16:06:29,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:06:29,217 INFO L124 PetriNetUnfolderBase]: 230/603 cut-off events. [2024-11-08 16:06:29,217 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2024-11-08 16:06:29,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 952 conditions, 603 events. 230/603 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 3441 event pairs, 124 based on Foata normal form. 1/403 useless extension candidates. Maximal degree in co-relation 810. Up to 294 conditions per place. [2024-11-08 16:06:29,229 INFO L140 encePairwiseOnDemand]: 94/101 looper letters, 31 selfloop transitions, 2 changer transitions 0/91 dead transitions. [2024-11-08 16:06:29,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 91 transitions, 266 flow [2024-11-08 16:06:29,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 16:06:29,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-08 16:06:29,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 224 transitions. [2024-11-08 16:06:29,243 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7392739273927392 [2024-11-08 16:06:29,245 INFO L175 Difference]: Start difference. First operand has 93 places, 97 transitions, 212 flow. Second operand 3 states and 224 transitions. [2024-11-08 16:06:29,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 91 transitions, 266 flow [2024-11-08 16:06:29,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 91 transitions, 254 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-08 16:06:29,253 INFO L231 Difference]: Finished difference. Result has 83 places, 91 transitions, 192 flow [2024-11-08 16:06:29,255 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=192, PETRI_PLACES=83, PETRI_TRANSITIONS=91} [2024-11-08 16:06:29,259 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, -10 predicate places. [2024-11-08 16:06:29,259 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 91 transitions, 192 flow [2024-11-08 16:06:29,260 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:06:29,260 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:06:29,260 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-08 16:06:29,260 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-08 16:06:29,260 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2024-11-08 16:06:29,261 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:06:29,261 INFO L85 PathProgramCache]: Analyzing trace with hash 23203178, now seen corresponding path program 1 times [2024-11-08 16:06:29,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:06:29,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163486177] [2024-11-08 16:06:29,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:06:29,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:06:29,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:06:29,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:06:29,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:06:29,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163486177] [2024-11-08 16:06:29,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163486177] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:06:29,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:06:29,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 16:06:29,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937093740] [2024-11-08 16:06:29,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:06:29,698 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 16:06:29,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:06:29,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 16:06:29,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-08 16:06:29,969 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 101 [2024-11-08 16:06:29,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 91 transitions, 192 flow. Second operand has 5 states, 5 states have (on average 50.8) internal successors, (254), 5 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:06:29,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:06:29,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 101 [2024-11-08 16:06:29,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:06:30,332 INFO L124 PetriNetUnfolderBase]: 232/610 cut-off events. [2024-11-08 16:06:30,333 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-08 16:06:30,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 956 conditions, 610 events. 232/610 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 3469 event pairs, 124 based on Foata normal form. 0/399 useless extension candidates. Maximal degree in co-relation 879. Up to 324 conditions per place. [2024-11-08 16:06:30,341 INFO L140 encePairwiseOnDemand]: 96/101 looper letters, 51 selfloop transitions, 5 changer transitions 0/98 dead transitions. [2024-11-08 16:06:30,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 98 transitions, 318 flow [2024-11-08 16:06:30,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 16:06:30,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-08 16:06:30,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 257 transitions. [2024-11-08 16:06:30,345 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6361386138613861 [2024-11-08 16:06:30,345 INFO L175 Difference]: Start difference. First operand has 83 places, 91 transitions, 192 flow. Second operand 4 states and 257 transitions. [2024-11-08 16:06:30,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 98 transitions, 318 flow [2024-11-08 16:06:30,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 98 transitions, 314 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-08 16:06:30,350 INFO L231 Difference]: Finished difference. Result has 86 places, 95 transitions, 220 flow [2024-11-08 16:06:30,350 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=220, PETRI_PLACES=86, PETRI_TRANSITIONS=95} [2024-11-08 16:06:30,351 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, -7 predicate places. [2024-11-08 16:06:30,351 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 95 transitions, 220 flow [2024-11-08 16:06:30,352 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 50.8) internal successors, (254), 5 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:06:30,352 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:06:30,352 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-08 16:06:30,352 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-08 16:06:30,353 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2024-11-08 16:06:30,353 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:06:30,353 INFO L85 PathProgramCache]: Analyzing trace with hash 821375102, now seen corresponding path program 1 times [2024-11-08 16:06:30,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:06:30,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633844486] [2024-11-08 16:06:30,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:06:30,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:06:30,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:06:30,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:06:30,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:06:30,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633844486] [2024-11-08 16:06:30,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633844486] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:06:30,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:06:30,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-08 16:06:30,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556678888] [2024-11-08 16:06:30,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:06:30,492 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 16:06:30,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:06:30,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 16:06:30,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-08 16:06:30,609 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 101 [2024-11-08 16:06:30,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 95 transitions, 220 flow. Second operand has 5 states, 5 states have (on average 55.0) internal successors, (275), 5 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:06:30,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:06:30,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 101 [2024-11-08 16:06:30,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:06:31,003 INFO L124 PetriNetUnfolderBase]: 459/1200 cut-off events. [2024-11-08 16:06:31,003 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2024-11-08 16:06:31,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1879 conditions, 1200 events. 459/1200 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 7128 event pairs, 248 based on Foata normal form. 1/808 useless extension candidates. Maximal degree in co-relation 968. Up to 318 conditions per place. [2024-11-08 16:06:31,016 INFO L140 encePairwiseOnDemand]: 80/101 looper letters, 73 selfloop transitions, 17 changer transitions 1/137 dead transitions. [2024-11-08 16:06:31,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 137 transitions, 492 flow [2024-11-08 16:06:31,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 16:06:31,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-08 16:06:31,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 364 transitions. [2024-11-08 16:06:31,022 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7207920792079208 [2024-11-08 16:06:31,022 INFO L175 Difference]: Start difference. First operand has 86 places, 95 transitions, 220 flow. Second operand 5 states and 364 transitions. [2024-11-08 16:06:31,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 137 transitions, 492 flow [2024-11-08 16:06:31,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 137 transitions, 492 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-08 16:06:31,027 INFO L231 Difference]: Finished difference. Result has 94 places, 109 transitions, 352 flow [2024-11-08 16:06:31,029 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=352, PETRI_PLACES=94, PETRI_TRANSITIONS=109} [2024-11-08 16:06:31,030 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, 1 predicate places. [2024-11-08 16:06:31,031 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 109 transitions, 352 flow [2024-11-08 16:06:31,031 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 55.0) internal successors, (275), 5 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:06:31,031 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:06:31,032 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1] [2024-11-08 16:06:31,032 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-08 16:06:31,032 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2024-11-08 16:06:31,033 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:06:31,033 INFO L85 PathProgramCache]: Analyzing trace with hash -243118094, now seen corresponding path program 1 times [2024-11-08 16:06:31,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:06:31,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733170240] [2024-11-08 16:06:31,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:06:31,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:06:31,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:06:31,415 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:06:31,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:06:31,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733170240] [2024-11-08 16:06:31,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733170240] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:06:31,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281835185] [2024-11-08 16:06:31,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:06:31,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:06:31,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:06:31,422 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:06:31,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-08 16:06:31,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:06:31,508 INFO L255 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-08 16:06:31,513 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:06:31,587 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-08 16:06:31,902 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:06:31,902 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:06:32,116 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:06:32,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281835185] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:06:32,117 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:06:32,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 10 [2024-11-08 16:06:32,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851815832] [2024-11-08 16:06:32,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:06:32,118 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-08 16:06:32,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:06:32,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-08 16:06:32,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2024-11-08 16:06:33,219 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 101 [2024-11-08 16:06:33,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 109 transitions, 352 flow. Second operand has 12 states, 12 states have (on average 51.75) internal successors, (621), 12 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:06:33,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:06:33,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 101 [2024-11-08 16:06:33,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:06:33,893 INFO L124 PetriNetUnfolderBase]: 458/1198 cut-off events. [2024-11-08 16:06:33,893 INFO L125 PetriNetUnfolderBase]: For 21/21 co-relation queries the response was YES. [2024-11-08 16:06:33,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1942 conditions, 1198 events. 458/1198 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 7217 event pairs, 248 based on Foata normal form. 1/808 useless extension candidates. Maximal degree in co-relation 1049. Up to 616 conditions per place. [2024-11-08 16:06:33,926 INFO L140 encePairwiseOnDemand]: 86/101 looper letters, 40 selfloop transitions, 26 changer transitions 0/108 dead transitions. [2024-11-08 16:06:33,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 108 transitions, 478 flow [2024-11-08 16:06:33,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-08 16:06:33,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-08 16:06:33,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 406 transitions. [2024-11-08 16:06:33,929 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5742574257425742 [2024-11-08 16:06:33,929 INFO L175 Difference]: Start difference. First operand has 94 places, 109 transitions, 352 flow. Second operand 7 states and 406 transitions. [2024-11-08 16:06:33,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 108 transitions, 478 flow [2024-11-08 16:06:33,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 108 transitions, 472 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-08 16:06:33,936 INFO L231 Difference]: Finished difference. Result has 98 places, 107 transitions, 390 flow [2024-11-08 16:06:33,936 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=338, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=390, PETRI_PLACES=98, PETRI_TRANSITIONS=107} [2024-11-08 16:06:33,938 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, 5 predicate places. [2024-11-08 16:06:33,939 INFO L471 AbstractCegarLoop]: Abstraction has has 98 places, 107 transitions, 390 flow [2024-11-08 16:06:33,939 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 51.75) internal successors, (621), 12 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:06:33,940 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:06:33,940 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:06:33,963 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-08 16:06:34,140 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2024-11-08 16:06:34,141 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2024-11-08 16:06:34,141 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:06:34,142 INFO L85 PathProgramCache]: Analyzing trace with hash -1710296826, now seen corresponding path program 1 times [2024-11-08 16:06:34,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:06:34,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775125374] [2024-11-08 16:06:34,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:06:34,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:06:34,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:06:34,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:06:34,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:06:34,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775125374] [2024-11-08 16:06:34,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775125374] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:06:34,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282612400] [2024-11-08 16:06:34,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:06:34,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:06:34,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:06:34,402 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:06:34,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-08 16:06:34,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:06:34,482 INFO L255 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-08 16:06:34,485 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:06:34,502 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-08 16:06:34,666 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-08 16:06:34,667 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 27 [2024-11-08 16:06:34,710 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:06:34,711 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:06:34,831 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:06:34,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282612400] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-08 16:06:34,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-08 16:06:34,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6, 3] total 11 [2024-11-08 16:06:34,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554775046] [2024-11-08 16:06:34,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:06:34,836 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 16:06:34,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:06:34,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 16:06:34,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-11-08 16:06:35,190 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 101 [2024-11-08 16:06:35,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 107 transitions, 390 flow. Second operand has 5 states, 5 states have (on average 63.2) internal successors, (316), 5 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:06:35,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:06:35,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 101 [2024-11-08 16:06:35,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:06:35,689 INFO L124 PetriNetUnfolderBase]: 679/1766 cut-off events. [2024-11-08 16:06:35,689 INFO L125 PetriNetUnfolderBase]: For 57/57 co-relation queries the response was YES. [2024-11-08 16:06:35,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2823 conditions, 1766 events. 679/1766 cut-off events. For 57/57 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 11930 event pairs, 372 based on Foata normal form. 3/1208 useless extension candidates. Maximal degree in co-relation 1897. Up to 599 conditions per place. [2024-11-08 16:06:35,708 INFO L140 encePairwiseOnDemand]: 89/101 looper letters, 59 selfloop transitions, 10 changer transitions 1/132 dead transitions. [2024-11-08 16:06:35,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 132 transitions, 600 flow [2024-11-08 16:06:35,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 16:06:35,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-08 16:06:35,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 382 transitions. [2024-11-08 16:06:35,711 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7564356435643564 [2024-11-08 16:06:35,711 INFO L175 Difference]: Start difference. First operand has 98 places, 107 transitions, 390 flow. Second operand 5 states and 382 transitions. [2024-11-08 16:06:35,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 132 transitions, 600 flow [2024-11-08 16:06:35,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 132 transitions, 538 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-11-08 16:06:35,717 INFO L231 Difference]: Finished difference. Result has 97 places, 108 transitions, 373 flow [2024-11-08 16:06:35,718 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=334, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=373, PETRI_PLACES=97, PETRI_TRANSITIONS=108} [2024-11-08 16:06:35,719 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, 4 predicate places. [2024-11-08 16:06:35,719 INFO L471 AbstractCegarLoop]: Abstraction has has 97 places, 108 transitions, 373 flow [2024-11-08 16:06:35,719 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 63.2) internal successors, (316), 5 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:06:35,720 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:06:35,720 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:06:35,742 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-08 16:06:35,920 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:06:35,921 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2024-11-08 16:06:35,921 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:06:35,921 INFO L85 PathProgramCache]: Analyzing trace with hash -254934781, now seen corresponding path program 1 times [2024-11-08 16:06:35,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:06:35,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879866972] [2024-11-08 16:06:35,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:06:35,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:06:35,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:06:36,085 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:06:36,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:06:36,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879866972] [2024-11-08 16:06:36,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879866972] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:06:36,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60545322] [2024-11-08 16:06:36,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:06:36,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:06:36,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:06:36,091 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:06:36,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-08 16:06:36,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:06:36,177 INFO L255 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-08 16:06:36,178 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:06:36,286 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:06:36,287 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:06:36,383 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:06:36,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60545322] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:06:36,384 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:06:36,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-08 16:06:36,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804148956] [2024-11-08 16:06:36,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:06:36,385 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-08 16:06:36,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:06:36,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-08 16:06:36,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2024-11-08 16:06:36,697 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 101 [2024-11-08 16:06:36,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 108 transitions, 373 flow. Second operand has 14 states, 14 states have (on average 56.142857142857146) internal successors, (786), 14 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:06:36,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:06:36,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 101 [2024-11-08 16:06:36,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:06:37,554 INFO L124 PetriNetUnfolderBase]: 913/2390 cut-off events. [2024-11-08 16:06:37,555 INFO L125 PetriNetUnfolderBase]: For 91/91 co-relation queries the response was YES. [2024-11-08 16:06:37,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3876 conditions, 2390 events. 913/2390 cut-off events. For 91/91 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 16017 event pairs, 496 based on Foata normal form. 3/1623 useless extension candidates. Maximal degree in co-relation 2097. Up to 877 conditions per place. [2024-11-08 16:06:37,582 INFO L140 encePairwiseOnDemand]: 80/101 looper letters, 76 selfloop transitions, 64 changer transitions 0/185 dead transitions. [2024-11-08 16:06:37,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 185 transitions, 970 flow [2024-11-08 16:06:37,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-08 16:06:37,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-08 16:06:37,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 789 transitions. [2024-11-08 16:06:37,585 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.650990099009901 [2024-11-08 16:06:37,585 INFO L175 Difference]: Start difference. First operand has 97 places, 108 transitions, 373 flow. Second operand 12 states and 789 transitions. [2024-11-08 16:06:37,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 185 transitions, 970 flow [2024-11-08 16:06:37,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 185 transitions, 968 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-08 16:06:37,592 INFO L231 Difference]: Finished difference. Result has 110 places, 145 transitions, 775 flow [2024-11-08 16:06:37,595 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=371, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=775, PETRI_PLACES=110, PETRI_TRANSITIONS=145} [2024-11-08 16:06:37,596 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, 17 predicate places. [2024-11-08 16:06:37,596 INFO L471 AbstractCegarLoop]: Abstraction has has 110 places, 145 transitions, 775 flow [2024-11-08 16:06:37,597 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 56.142857142857146) internal successors, (786), 14 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:06:37,597 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:06:37,597 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:06:37,618 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-08 16:06:37,798 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:06:37,798 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2024-11-08 16:06:37,799 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:06:37,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1711528890, now seen corresponding path program 1 times [2024-11-08 16:06:37,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:06:37,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662169565] [2024-11-08 16:06:37,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:06:37,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:06:37,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:06:37,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:06:37,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:06:37,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662169565] [2024-11-08 16:06:37,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662169565] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:06:37,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:06:37,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-08 16:06:37,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402288583] [2024-11-08 16:06:37,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:06:37,894 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 16:06:37,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:06:37,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 16:06:37,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-08 16:06:38,027 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 101 [2024-11-08 16:06:38,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 145 transitions, 775 flow. Second operand has 5 states, 5 states have (on average 58.6) internal successors, (293), 5 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:06:38,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:06:38,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 101 [2024-11-08 16:06:38,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:06:38,574 INFO L124 PetriNetUnfolderBase]: 1153/2964 cut-off events. [2024-11-08 16:06:38,574 INFO L125 PetriNetUnfolderBase]: For 255/255 co-relation queries the response was YES. [2024-11-08 16:06:38,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4910 conditions, 2964 events. 1153/2964 cut-off events. For 255/255 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 20386 event pairs, 586 based on Foata normal form. 52/2148 useless extension candidates. Maximal degree in co-relation 3396. Up to 1017 conditions per place. [2024-11-08 16:06:38,599 INFO L140 encePairwiseOnDemand]: 81/101 looper letters, 91 selfloop transitions, 36 changer transitions 1/180 dead transitions. [2024-11-08 16:06:38,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 180 transitions, 1127 flow [2024-11-08 16:06:38,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-08 16:06:38,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-08 16:06:38,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 430 transitions. [2024-11-08 16:06:38,602 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7095709570957096 [2024-11-08 16:06:38,602 INFO L175 Difference]: Start difference. First operand has 110 places, 145 transitions, 775 flow. Second operand 6 states and 430 transitions. [2024-11-08 16:06:38,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 180 transitions, 1127 flow [2024-11-08 16:06:38,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 180 transitions, 989 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-11-08 16:06:38,609 INFO L231 Difference]: Finished difference. Result has 113 places, 147 transitions, 725 flow [2024-11-08 16:06:38,609 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=637, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=725, PETRI_PLACES=113, PETRI_TRANSITIONS=147} [2024-11-08 16:06:38,610 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, 20 predicate places. [2024-11-08 16:06:38,610 INFO L471 AbstractCegarLoop]: Abstraction has has 113 places, 147 transitions, 725 flow [2024-11-08 16:06:38,611 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 58.6) internal successors, (293), 5 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:06:38,611 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:06:38,611 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2024-11-08 16:06:38,611 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-08 16:06:38,611 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2024-11-08 16:06:38,612 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:06:38,612 INFO L85 PathProgramCache]: Analyzing trace with hash 703019915, now seen corresponding path program 2 times [2024-11-08 16:06:38,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:06:38,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39449681] [2024-11-08 16:06:38,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:06:38,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:06:38,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:06:38,931 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:06:38,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:06:38,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39449681] [2024-11-08 16:06:38,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39449681] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:06:38,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947111929] [2024-11-08 16:06:38,932 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 16:06:38,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:06:38,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:06:38,934 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:06:38,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-08 16:06:39,021 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 16:06:39,021 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:06:39,023 INFO L255 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-08 16:06:39,025 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:06:39,047 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-08 16:06:39,253 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-08 16:06:39,254 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 27 [2024-11-08 16:06:39,367 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:06:39,367 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:06:39,659 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:06:39,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947111929] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:06:39,660 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:06:39,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 18 [2024-11-08 16:06:39,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644992601] [2024-11-08 16:06:39,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:06:39,661 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-08 16:06:39,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:06:39,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-08 16:06:39,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2024-11-08 16:06:43,107 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 101 [2024-11-08 16:06:43,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 147 transitions, 725 flow. Second operand has 20 states, 20 states have (on average 52.25) internal successors, (1045), 20 states have internal predecessors, (1045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:06:43,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:06:43,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 101 [2024-11-08 16:06:43,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:06:45,460 INFO L124 PetriNetUnfolderBase]: 1331/3674 cut-off events. [2024-11-08 16:06:45,461 INFO L125 PetriNetUnfolderBase]: For 767/863 co-relation queries the response was YES. [2024-11-08 16:06:45,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6391 conditions, 3674 events. 1331/3674 cut-off events. For 767/863 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 26460 event pairs, 744 based on Foata normal form. 45/2567 useless extension candidates. Maximal degree in co-relation 5412. Up to 612 conditions per place. [2024-11-08 16:06:45,497 INFO L140 encePairwiseOnDemand]: 78/101 looper letters, 156 selfloop transitions, 48 changer transitions 12/258 dead transitions. [2024-11-08 16:06:45,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 258 transitions, 1627 flow [2024-11-08 16:06:45,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-08 16:06:45,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-08 16:06:45,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 932 transitions. [2024-11-08 16:06:45,501 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6591230551626591 [2024-11-08 16:06:45,502 INFO L175 Difference]: Start difference. First operand has 113 places, 147 transitions, 725 flow. Second operand 14 states and 932 transitions. [2024-11-08 16:06:45,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 258 transitions, 1627 flow [2024-11-08 16:06:45,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 258 transitions, 1553 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-08 16:06:45,520 INFO L231 Difference]: Finished difference. Result has 130 places, 154 transitions, 928 flow [2024-11-08 16:06:45,522 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=573, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=928, PETRI_PLACES=130, PETRI_TRANSITIONS=154} [2024-11-08 16:06:45,523 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, 37 predicate places. [2024-11-08 16:06:45,525 INFO L471 AbstractCegarLoop]: Abstraction has has 130 places, 154 transitions, 928 flow [2024-11-08 16:06:45,526 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 52.25) internal successors, (1045), 20 states have internal predecessors, (1045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:06:45,527 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:06:45,527 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:06:45,552 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-08 16:06:45,731 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:06:45,731 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2024-11-08 16:06:45,732 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:06:45,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1308100978, now seen corresponding path program 1 times [2024-11-08 16:06:45,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:06:45,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95142592] [2024-11-08 16:06:45,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:06:45,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:06:45,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:06:45,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:06:45,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:06:45,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95142592] [2024-11-08 16:06:45,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95142592] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:06:45,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:06:45,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-08 16:06:45,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805894639] [2024-11-08 16:06:45,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:06:45,912 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-08 16:06:45,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:06:45,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-08 16:06:45,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-08 16:06:46,079 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 101 [2024-11-08 16:06:46,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 154 transitions, 928 flow. Second operand has 6 states, 6 states have (on average 58.5) internal successors, (351), 6 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:06:46,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:06:46,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 101 [2024-11-08 16:06:46,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:06:46,995 INFO L124 PetriNetUnfolderBase]: 2095/5384 cut-off events. [2024-11-08 16:06:46,995 INFO L125 PetriNetUnfolderBase]: For 1078/1273 co-relation queries the response was YES. [2024-11-08 16:06:47,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9273 conditions, 5384 events. 2095/5384 cut-off events. For 1078/1273 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 42089 event pairs, 1168 based on Foata normal form. 27/3817 useless extension candidates. Maximal degree in co-relation 8427. Up to 2549 conditions per place. [2024-11-08 16:06:47,042 INFO L140 encePairwiseOnDemand]: 81/101 looper letters, 94 selfloop transitions, 32 changer transitions 3/184 dead transitions. [2024-11-08 16:06:47,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 184 transitions, 1288 flow [2024-11-08 16:06:47,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-08 16:06:47,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-08 16:06:47,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 425 transitions. [2024-11-08 16:06:47,044 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7013201320132013 [2024-11-08 16:06:47,044 INFO L175 Difference]: Start difference. First operand has 130 places, 154 transitions, 928 flow. Second operand 6 states and 425 transitions. [2024-11-08 16:06:47,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 184 transitions, 1288 flow [2024-11-08 16:06:47,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 184 transitions, 1246 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-11-08 16:06:47,057 INFO L231 Difference]: Finished difference. Result has 133 places, 156 transitions, 966 flow [2024-11-08 16:06:47,057 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=886, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=966, PETRI_PLACES=133, PETRI_TRANSITIONS=156} [2024-11-08 16:06:47,058 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, 40 predicate places. [2024-11-08 16:06:47,058 INFO L471 AbstractCegarLoop]: Abstraction has has 133 places, 156 transitions, 966 flow [2024-11-08 16:06:47,059 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 58.5) internal successors, (351), 6 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:06:47,059 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:06:47,059 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2024-11-08 16:06:47,059 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-08 16:06:47,059 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2024-11-08 16:06:47,060 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:06:47,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1406528606, now seen corresponding path program 3 times [2024-11-08 16:06:47,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:06:47,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091324488] [2024-11-08 16:06:47,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:06:47,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:06:47,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:06:47,234 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:06:47,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:06:47,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091324488] [2024-11-08 16:06:47,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091324488] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:06:47,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627572280] [2024-11-08 16:06:47,235 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-08 16:06:47,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:06:47,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:06:47,237 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:06:47,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-08 16:06:47,327 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-08 16:06:47,328 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:06:47,329 INFO L255 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-08 16:06:47,333 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:06:47,348 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-08 16:06:47,561 INFO L349 Elim1Store]: treesize reduction 15, result has 37.5 percent of original size [2024-11-08 16:06:47,561 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 33 [2024-11-08 16:06:47,787 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-08 16:06:47,787 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:06:48,088 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-08 16:06:48,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627572280] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:06:48,092 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:06:48,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 20 [2024-11-08 16:06:48,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200704331] [2024-11-08 16:06:48,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:06:48,092 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-08 16:06:48,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:06:48,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-08 16:06:48,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2024-11-08 16:06:50,091 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 101 [2024-11-08 16:06:50,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 156 transitions, 966 flow. Second operand has 21 states, 21 states have (on average 52.19047619047619) internal successors, (1096), 21 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:06:50,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:06:50,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 101 [2024-11-08 16:06:50,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:06:53,258 INFO L124 PetriNetUnfolderBase]: 872/2689 cut-off events. [2024-11-08 16:06:53,258 INFO L125 PetriNetUnfolderBase]: For 1112/1192 co-relation queries the response was YES. [2024-11-08 16:06:53,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4963 conditions, 2689 events. 872/2689 cut-off events. For 1112/1192 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 18954 event pairs, 496 based on Foata normal form. 15/1849 useless extension candidates. Maximal degree in co-relation 4939. Up to 825 conditions per place. [2024-11-08 16:06:53,283 INFO L140 encePairwiseOnDemand]: 77/101 looper letters, 81 selfloop transitions, 78 changer transitions 6/207 dead transitions. [2024-11-08 16:06:53,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 207 transitions, 1477 flow [2024-11-08 16:06:53,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-08 16:06:53,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-11-08 16:06:53,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1425 transitions. [2024-11-08 16:06:53,289 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5643564356435643 [2024-11-08 16:06:53,289 INFO L175 Difference]: Start difference. First operand has 133 places, 156 transitions, 966 flow. Second operand 25 states and 1425 transitions. [2024-11-08 16:06:53,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 207 transitions, 1477 flow [2024-11-08 16:06:53,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 207 transitions, 1370 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-11-08 16:06:53,306 INFO L231 Difference]: Finished difference. Result has 148 places, 157 transitions, 1062 flow [2024-11-08 16:06:53,306 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=773, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=1062, PETRI_PLACES=148, PETRI_TRANSITIONS=157} [2024-11-08 16:06:53,307 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, 55 predicate places. [2024-11-08 16:06:53,307 INFO L471 AbstractCegarLoop]: Abstraction has has 148 places, 157 transitions, 1062 flow [2024-11-08 16:06:53,308 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 52.19047619047619) internal successors, (1096), 21 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:06:53,308 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:06:53,308 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:06:53,332 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-08 16:06:53,513 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-08 16:06:53,513 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2024-11-08 16:06:53,514 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:06:53,514 INFO L85 PathProgramCache]: Analyzing trace with hash 737652227, now seen corresponding path program 1 times [2024-11-08 16:06:53,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:06:53,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98578032] [2024-11-08 16:06:53,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:06:53,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:06:53,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:06:53,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:06:53,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:06:53,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98578032] [2024-11-08 16:06:53,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98578032] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:06:53,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:06:53,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-08 16:06:53,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617629967] [2024-11-08 16:06:53,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:06:53,629 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-08 16:06:53,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:06:53,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-08 16:06:53,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-08 16:06:53,778 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 101 [2024-11-08 16:06:53,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 157 transitions, 1062 flow. Second operand has 6 states, 6 states have (on average 56.833333333333336) internal successors, (341), 6 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:06:53,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:06:53,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 101 [2024-11-08 16:06:53,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:06:54,236 INFO L124 PetriNetUnfolderBase]: 1328/2746 cut-off events. [2024-11-08 16:06:54,236 INFO L125 PetriNetUnfolderBase]: For 1408/1648 co-relation queries the response was YES. [2024-11-08 16:06:54,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6012 conditions, 2746 events. 1328/2746 cut-off events. For 1408/1648 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 15082 event pairs, 691 based on Foata normal form. 0/2064 useless extension candidates. Maximal degree in co-relation 5112. Up to 1379 conditions per place. [2024-11-08 16:06:54,258 INFO L140 encePairwiseOnDemand]: 83/101 looper letters, 71 selfloop transitions, 23 changer transitions 35/192 dead transitions. [2024-11-08 16:06:54,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 192 transitions, 1442 flow [2024-11-08 16:06:54,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-08 16:06:54,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-08 16:06:54,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 471 transitions. [2024-11-08 16:06:54,261 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6661951909476662 [2024-11-08 16:06:54,261 INFO L175 Difference]: Start difference. First operand has 148 places, 157 transitions, 1062 flow. Second operand 7 states and 471 transitions. [2024-11-08 16:06:54,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 192 transitions, 1442 flow [2024-11-08 16:06:54,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 192 transitions, 1181 flow, removed 63 selfloop flow, removed 16 redundant places. [2024-11-08 16:06:54,271 INFO L231 Difference]: Finished difference. Result has 136 places, 144 transitions, 772 flow [2024-11-08 16:06:54,272 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=801, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=772, PETRI_PLACES=136, PETRI_TRANSITIONS=144} [2024-11-08 16:06:54,272 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, 43 predicate places. [2024-11-08 16:06:54,273 INFO L471 AbstractCegarLoop]: Abstraction has has 136 places, 144 transitions, 772 flow [2024-11-08 16:06:54,273 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 56.833333333333336) internal successors, (341), 6 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:06:54,273 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:06:54,273 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, 1, 1, 1, 1] [2024-11-08 16:06:54,273 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-08 16:06:54,274 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2024-11-08 16:06:54,274 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:06:54,274 INFO L85 PathProgramCache]: Analyzing trace with hash 804525231, now seen corresponding path program 1 times [2024-11-08 16:06:54,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:06:54,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991262379] [2024-11-08 16:06:54,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:06:54,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:06:54,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:06:54,569 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-08 16:06:54,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:06:54,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991262379] [2024-11-08 16:06:54,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991262379] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:06:54,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:06:54,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 16:06:54,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581721982] [2024-11-08 16:06:54,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:06:54,571 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 16:06:54,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:06:54,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 16:06:54,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-08 16:06:54,663 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 101 [2024-11-08 16:06:54,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 144 transitions, 772 flow. Second operand has 5 states, 5 states have (on average 59.2) internal successors, (296), 5 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:06:54,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:06:54,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 101 [2024-11-08 16:06:54,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:06:55,027 INFO L124 PetriNetUnfolderBase]: 1420/3241 cut-off events. [2024-11-08 16:06:55,027 INFO L125 PetriNetUnfolderBase]: For 846/1059 co-relation queries the response was YES. [2024-11-08 16:06:55,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6532 conditions, 3241 events. 1420/3241 cut-off events. For 846/1059 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 21859 event pairs, 918 based on Foata normal form. 0/2719 useless extension candidates. Maximal degree in co-relation 6484. Up to 1863 conditions per place. [2024-11-08 16:06:55,052 INFO L140 encePairwiseOnDemand]: 95/101 looper letters, 58 selfloop transitions, 7 changer transitions 0/141 dead transitions. [2024-11-08 16:06:55,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 141 transitions, 896 flow [2024-11-08 16:06:55,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 16:06:55,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-08 16:06:55,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 319 transitions. [2024-11-08 16:06:55,054 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6316831683168317 [2024-11-08 16:06:55,054 INFO L175 Difference]: Start difference. First operand has 136 places, 144 transitions, 772 flow. Second operand 5 states and 319 transitions. [2024-11-08 16:06:55,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 141 transitions, 896 flow [2024-11-08 16:06:55,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 141 transitions, 792 flow, removed 9 selfloop flow, removed 13 redundant places. [2024-11-08 16:06:55,075 INFO L231 Difference]: Finished difference. Result has 115 places, 141 transitions, 676 flow [2024-11-08 16:06:55,076 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=662, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=676, PETRI_PLACES=115, PETRI_TRANSITIONS=141} [2024-11-08 16:06:55,076 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, 22 predicate places. [2024-11-08 16:06:55,076 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 141 transitions, 676 flow [2024-11-08 16:06:55,077 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 59.2) internal successors, (296), 5 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:06:55,077 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:06:55,077 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, 1, 1, 1, 1] [2024-11-08 16:06:55,077 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-08 16:06:55,077 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2024-11-08 16:06:55,078 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:06:55,078 INFO L85 PathProgramCache]: Analyzing trace with hash 804525232, now seen corresponding path program 1 times [2024-11-08 16:06:55,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:06:55,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506709928] [2024-11-08 16:06:55,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:06:55,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:06:55,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:06:55,662 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-08 16:06:55,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:06:55,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506709928] [2024-11-08 16:06:55,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506709928] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:06:55,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545101283] [2024-11-08 16:06:55,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:06:55,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:06:55,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:06:55,666 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:06:55,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-08 16:06:55,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:06:55,785 INFO L255 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-11-08 16:06:55,788 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:06:55,798 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-08 16:06:55,873 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-11-08 16:06:55,874 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 22 [2024-11-08 16:06:56,039 INFO L349 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2024-11-08 16:06:56,039 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 37 [2024-11-08 16:06:56,163 INFO L349 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2024-11-08 16:06:56,163 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 31 [2024-11-08 16:06:56,517 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-08 16:06:56,518 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:06:56,930 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-08 16:06:56,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545101283] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-08 16:06:56,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-08 16:06:56,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 5] total 16 [2024-11-08 16:06:56,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107227164] [2024-11-08 16:06:56,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:06:56,931 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-08 16:06:56,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:06:56,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-08 16:06:56,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2024-11-08 16:06:57,742 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 101 [2024-11-08 16:06:57,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 141 transitions, 676 flow. Second operand has 7 states, 7 states have (on average 66.28571428571429) internal successors, (464), 7 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:06:57,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:06:57,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 101 [2024-11-08 16:06:57,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:06:59,145 INFO L124 PetriNetUnfolderBase]: 1381/3490 cut-off events. [2024-11-08 16:06:59,145 INFO L125 PetriNetUnfolderBase]: For 146/146 co-relation queries the response was YES. [2024-11-08 16:06:59,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5553 conditions, 3490 events. 1381/3490 cut-off events. For 146/146 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 24605 event pairs, 507 based on Foata normal form. 0/2359 useless extension candidates. Maximal degree in co-relation 1845. Up to 1134 conditions per place. [2024-11-08 16:06:59,171 INFO L140 encePairwiseOnDemand]: 92/101 looper letters, 64 selfloop transitions, 14 changer transitions 0/155 dead transitions. [2024-11-08 16:06:59,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 155 transitions, 862 flow [2024-11-08 16:06:59,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-08 16:06:59,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-08 16:06:59,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 499 transitions. [2024-11-08 16:06:59,174 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7057991513437057 [2024-11-08 16:06:59,174 INFO L175 Difference]: Start difference. First operand has 115 places, 141 transitions, 676 flow. Second operand 7 states and 499 transitions. [2024-11-08 16:06:59,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 155 transitions, 862 flow [2024-11-08 16:06:59,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 155 transitions, 851 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-08 16:06:59,179 INFO L231 Difference]: Finished difference. Result has 120 places, 143 transitions, 714 flow [2024-11-08 16:06:59,179 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=665, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=714, PETRI_PLACES=120, PETRI_TRANSITIONS=143} [2024-11-08 16:06:59,180 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, 27 predicate places. [2024-11-08 16:06:59,180 INFO L471 AbstractCegarLoop]: Abstraction has has 120 places, 143 transitions, 714 flow [2024-11-08 16:06:59,180 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 66.28571428571429) internal successors, (464), 7 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:06:59,181 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:06:59,181 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, 1, 1, 1, 1, 1] [2024-11-08 16:06:59,202 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-08 16:06:59,381 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:06:59,382 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2024-11-08 16:06:59,382 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:06:59,382 INFO L85 PathProgramCache]: Analyzing trace with hash -829520856, now seen corresponding path program 1 times [2024-11-08 16:06:59,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:06:59,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709274466] [2024-11-08 16:06:59,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:06:59,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:06:59,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:06:59,872 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-08 16:06:59,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:06:59,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709274466] [2024-11-08 16:06:59,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709274466] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:06:59,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144190285] [2024-11-08 16:06:59,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:06:59,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:06:59,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:06:59,875 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:06:59,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-08 16:06:59,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:06:59,980 INFO L255 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-08 16:06:59,982 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:06:59,989 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-08 16:07:00,074 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-11-08 16:07:00,074 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2024-11-08 16:07:00,206 INFO L349 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2024-11-08 16:07:00,206 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 28 [2024-11-08 16:07:00,524 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-08 16:07:00,525 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:07:00,822 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-08 16:07:00,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144190285] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-08 16:07:00,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-08 16:07:00,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 17 [2024-11-08 16:07:00,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994190153] [2024-11-08 16:07:00,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:07:00,823 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-08 16:07:00,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:07:00,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-08 16:07:00,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2024-11-08 16:07:01,600 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 101 [2024-11-08 16:07:01,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 143 transitions, 714 flow. Second operand has 7 states, 7 states have (on average 66.28571428571429) internal successors, (464), 7 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:07:01,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:07:01,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 101 [2024-11-08 16:07:01,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:07:02,283 INFO L124 PetriNetUnfolderBase]: 1366/3289 cut-off events. [2024-11-08 16:07:02,283 INFO L125 PetriNetUnfolderBase]: For 869/935 co-relation queries the response was YES. [2024-11-08 16:07:02,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6029 conditions, 3289 events. 1366/3289 cut-off events. For 869/935 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 21898 event pairs, 408 based on Foata normal form. 30/2383 useless extension candidates. Maximal degree in co-relation 2004. Up to 1134 conditions per place. [2024-11-08 16:07:02,308 INFO L140 encePairwiseOnDemand]: 92/101 looper letters, 66 selfloop transitions, 12 changer transitions 0/156 dead transitions. [2024-11-08 16:07:02,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 156 transitions, 898 flow [2024-11-08 16:07:02,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-08 16:07:02,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-08 16:07:02,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 499 transitions. [2024-11-08 16:07:02,311 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7057991513437057 [2024-11-08 16:07:02,311 INFO L175 Difference]: Start difference. First operand has 120 places, 143 transitions, 714 flow. Second operand 7 states and 499 transitions. [2024-11-08 16:07:02,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 156 transitions, 898 flow [2024-11-08 16:07:02,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 156 transitions, 887 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-08 16:07:02,316 INFO L231 Difference]: Finished difference. Result has 125 places, 144 transitions, 744 flow [2024-11-08 16:07:02,317 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=703, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=744, PETRI_PLACES=125, PETRI_TRANSITIONS=144} [2024-11-08 16:07:02,317 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, 32 predicate places. [2024-11-08 16:07:02,317 INFO L471 AbstractCegarLoop]: Abstraction has has 125 places, 144 transitions, 744 flow [2024-11-08 16:07:02,318 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 66.28571428571429) internal successors, (464), 7 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:07:02,318 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:07:02,318 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, 1, 1, 1, 1, 1] [2024-11-08 16:07:02,339 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-08 16:07:02,518 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-08 16:07:02,519 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2024-11-08 16:07:02,519 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:07:02,519 INFO L85 PathProgramCache]: Analyzing trace with hash -829520857, now seen corresponding path program 1 times [2024-11-08 16:07:02,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:07:02,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976068249] [2024-11-08 16:07:02,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:07:02,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:07:02,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:07:02,759 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-08 16:07:02,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:07:02,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976068249] [2024-11-08 16:07:02,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976068249] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:07:02,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:07:02,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-08 16:07:02,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413061045] [2024-11-08 16:07:02,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:07:02,760 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 16:07:02,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:07:02,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 16:07:02,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-08 16:07:02,859 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 101 [2024-11-08 16:07:02,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 144 transitions, 744 flow. Second operand has 5 states, 5 states have (on average 59.2) internal successors, (296), 5 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:07:02,859 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:07:02,859 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 101 [2024-11-08 16:07:02,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:07:03,329 INFO L124 PetriNetUnfolderBase]: 1954/4423 cut-off events. [2024-11-08 16:07:03,329 INFO L125 PetriNetUnfolderBase]: For 4674/4779 co-relation queries the response was YES. [2024-11-08 16:07:03,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9716 conditions, 4423 events. 1954/4423 cut-off events. For 4674/4779 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 31951 event pairs, 1158 based on Foata normal form. 237/3817 useless extension candidates. Maximal degree in co-relation 3232. Up to 2409 conditions per place. [2024-11-08 16:07:03,368 INFO L140 encePairwiseOnDemand]: 95/101 looper letters, 60 selfloop transitions, 7 changer transitions 0/141 dead transitions. [2024-11-08 16:07:03,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 141 transitions, 872 flow [2024-11-08 16:07:03,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 16:07:03,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-08 16:07:03,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 319 transitions. [2024-11-08 16:07:03,370 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6316831683168317 [2024-11-08 16:07:03,370 INFO L175 Difference]: Start difference. First operand has 125 places, 144 transitions, 744 flow. Second operand 5 states and 319 transitions. [2024-11-08 16:07:03,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 141 transitions, 872 flow [2024-11-08 16:07:03,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 141 transitions, 855 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-08 16:07:03,376 INFO L231 Difference]: Finished difference. Result has 121 places, 141 transitions, 735 flow [2024-11-08 16:07:03,377 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=721, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=735, PETRI_PLACES=121, PETRI_TRANSITIONS=141} [2024-11-08 16:07:03,377 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, 28 predicate places. [2024-11-08 16:07:03,377 INFO L471 AbstractCegarLoop]: Abstraction has has 121 places, 141 transitions, 735 flow [2024-11-08 16:07:03,378 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 59.2) internal successors, (296), 5 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:07:03,378 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:07:03,378 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, 1, 1, 1, 1, 1, 1] [2024-11-08 16:07:03,378 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-08 16:07:03,378 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2024-11-08 16:07:03,378 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:07:03,378 INFO L85 PathProgramCache]: Analyzing trace with hash -1446678344, now seen corresponding path program 1 times [2024-11-08 16:07:03,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:07:03,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129005299] [2024-11-08 16:07:03,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:07:03,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:07:03,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:07:03,991 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-08 16:07:03,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:07:03,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129005299] [2024-11-08 16:07:03,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129005299] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:07:03,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104749011] [2024-11-08 16:07:03,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:07:03,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:07:03,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:07:03,994 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:07:03,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-08 16:07:04,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:07:04,112 INFO L255 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-11-08 16:07:04,115 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:07:04,121 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-08 16:07:04,188 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-11-08 16:07:04,189 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 22 [2024-11-08 16:07:04,348 INFO L349 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2024-11-08 16:07:04,348 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 37 [2024-11-08 16:07:04,495 INFO L349 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2024-11-08 16:07:04,495 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 31 [2024-11-08 16:07:04,832 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-08 16:07:04,832 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:07:05,184 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-08 16:07:05,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104749011] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-08 16:07:05,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-08 16:07:05,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 5] total 17 [2024-11-08 16:07:05,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933642322] [2024-11-08 16:07:05,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:07:05,186 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-08 16:07:05,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:07:05,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-08 16:07:05,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2024-11-08 16:07:05,883 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 101 [2024-11-08 16:07:05,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 141 transitions, 735 flow. Second operand has 7 states, 7 states have (on average 66.57142857142857) internal successors, (466), 7 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:07:05,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:07:05,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 101 [2024-11-08 16:07:05,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:07:06,596 INFO L124 PetriNetUnfolderBase]: 1855/4354 cut-off events. [2024-11-08 16:07:06,596 INFO L125 PetriNetUnfolderBase]: For 4131/4857 co-relation queries the response was YES. [2024-11-08 16:07:06,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8857 conditions, 4354 events. 1855/4354 cut-off events. For 4131/4857 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 31888 event pairs, 702 based on Foata normal form. 0/3172 useless extension candidates. Maximal degree in co-relation 2945. Up to 1485 conditions per place. [2024-11-08 16:07:06,624 INFO L140 encePairwiseOnDemand]: 92/101 looper letters, 65 selfloop transitions, 14 changer transitions 0/155 dead transitions. [2024-11-08 16:07:06,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 155 transitions, 946 flow [2024-11-08 16:07:06,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-08 16:07:06,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-08 16:07:06,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 498 transitions. [2024-11-08 16:07:06,626 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7043847241867044 [2024-11-08 16:07:06,626 INFO L175 Difference]: Start difference. First operand has 121 places, 141 transitions, 735 flow. Second operand 7 states and 498 transitions. [2024-11-08 16:07:06,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 155 transitions, 946 flow [2024-11-08 16:07:06,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 155 transitions, 935 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-08 16:07:06,632 INFO L231 Difference]: Finished difference. Result has 126 places, 143 transitions, 773 flow [2024-11-08 16:07:06,632 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=724, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=773, PETRI_PLACES=126, PETRI_TRANSITIONS=143} [2024-11-08 16:07:06,633 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, 33 predicate places. [2024-11-08 16:07:06,633 INFO L471 AbstractCegarLoop]: Abstraction has has 126 places, 143 transitions, 773 flow [2024-11-08 16:07:06,633 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 66.57142857142857) internal successors, (466), 7 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:07:06,633 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:07:06,634 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, 1, 1, 1, 1, 1, 1] [2024-11-08 16:07:06,655 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-08 16:07:06,834 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-08 16:07:06,834 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2024-11-08 16:07:06,834 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:07:06,835 INFO L85 PathProgramCache]: Analyzing trace with hash 54657969, now seen corresponding path program 1 times [2024-11-08 16:07:06,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:07:06,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284297458] [2024-11-08 16:07:06,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:07:06,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:07:06,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:07:06,979 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-08 16:07:06,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:07:06,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284297458] [2024-11-08 16:07:06,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284297458] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:07:06,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:07:06,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-08 16:07:06,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238707027] [2024-11-08 16:07:06,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:07:06,980 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 16:07:06,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:07:06,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 16:07:06,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-08 16:07:07,084 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 101 [2024-11-08 16:07:07,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 143 transitions, 773 flow. Second operand has 5 states, 5 states have (on average 62.2) internal successors, (311), 5 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:07:07,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:07:07,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 101 [2024-11-08 16:07:07,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:07:07,527 INFO L124 PetriNetUnfolderBase]: 1177/2830 cut-off events. [2024-11-08 16:07:07,528 INFO L125 PetriNetUnfolderBase]: For 3908/4466 co-relation queries the response was YES. [2024-11-08 16:07:07,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6720 conditions, 2830 events. 1177/2830 cut-off events. For 3908/4466 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 19400 event pairs, 702 based on Foata normal form. 75/2185 useless extension candidates. Maximal degree in co-relation 2234. Up to 1488 conditions per place. [2024-11-08 16:07:07,553 INFO L140 encePairwiseOnDemand]: 96/101 looper letters, 58 selfloop transitions, 7 changer transitions 0/141 dead transitions. [2024-11-08 16:07:07,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 141 transitions, 899 flow [2024-11-08 16:07:07,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 16:07:07,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-08 16:07:07,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 331 transitions. [2024-11-08 16:07:07,555 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6554455445544555 [2024-11-08 16:07:07,555 INFO L175 Difference]: Start difference. First operand has 126 places, 143 transitions, 773 flow. Second operand 5 states and 331 transitions. [2024-11-08 16:07:07,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 141 transitions, 899 flow [2024-11-08 16:07:07,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 141 transitions, 882 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-08 16:07:07,562 INFO L231 Difference]: Finished difference. Result has 124 places, 141 transitions, 766 flow [2024-11-08 16:07:07,562 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=752, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=766, PETRI_PLACES=124, PETRI_TRANSITIONS=141} [2024-11-08 16:07:07,563 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, 31 predicate places. [2024-11-08 16:07:07,563 INFO L471 AbstractCegarLoop]: Abstraction has has 124 places, 141 transitions, 766 flow [2024-11-08 16:07:07,564 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 62.2) internal successors, (311), 5 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:07:07,564 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:07:07,564 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, 1, 1, 1, 1, 1, 1] [2024-11-08 16:07:07,564 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-08 16:07:07,564 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2024-11-08 16:07:07,565 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:07:07,565 INFO L85 PathProgramCache]: Analyzing trace with hash 54657970, now seen corresponding path program 1 times [2024-11-08 16:07:07,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:07:07,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793157014] [2024-11-08 16:07:07,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:07:07,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:07:07,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:07:07,830 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-08 16:07:07,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:07:07,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793157014] [2024-11-08 16:07:07,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793157014] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:07:07,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434863029] [2024-11-08 16:07:07,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:07:07,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:07:07,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:07:07,833 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:07:07,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-08 16:07:07,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:07:07,946 INFO L255 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-11-08 16:07:07,949 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:07:07,964 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-08 16:07:08,034 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-11-08 16:07:08,034 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2024-11-08 16:07:08,132 INFO L349 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2024-11-08 16:07:08,132 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 28 [2024-11-08 16:07:08,413 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-08 16:07:08,413 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:07:08,662 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-08 16:07:08,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434863029] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-08 16:07:08,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-08 16:07:08,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 6] total 15 [2024-11-08 16:07:08,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801591087] [2024-11-08 16:07:08,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:07:08,663 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-08 16:07:08,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:07:08,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-08 16:07:08,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2024-11-08 16:07:09,111 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 101 [2024-11-08 16:07:09,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 141 transitions, 766 flow. Second operand has 7 states, 7 states have (on average 67.28571428571429) internal successors, (471), 7 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:07:09,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:07:09,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 101 [2024-11-08 16:07:09,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:07:09,664 INFO L124 PetriNetUnfolderBase]: 1684/4009 cut-off events. [2024-11-08 16:07:09,664 INFO L125 PetriNetUnfolderBase]: For 4419/4866 co-relation queries the response was YES. [2024-11-08 16:07:09,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9507 conditions, 4009 events. 1684/4009 cut-off events. For 4419/4866 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 28345 event pairs, 465 based on Foata normal form. 156/3118 useless extension candidates. Maximal degree in co-relation 3161. Up to 1668 conditions per place. [2024-11-08 16:07:09,687 INFO L140 encePairwiseOnDemand]: 92/101 looper letters, 65 selfloop transitions, 14 changer transitions 0/155 dead transitions. [2024-11-08 16:07:09,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 155 transitions, 975 flow [2024-11-08 16:07:09,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-08 16:07:09,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-08 16:07:09,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 570 transitions. [2024-11-08 16:07:09,689 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7054455445544554 [2024-11-08 16:07:09,689 INFO L175 Difference]: Start difference. First operand has 124 places, 141 transitions, 766 flow. Second operand 8 states and 570 transitions. [2024-11-08 16:07:09,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 155 transitions, 975 flow [2024-11-08 16:07:09,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 155 transitions, 964 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-08 16:07:09,697 INFO L231 Difference]: Finished difference. Result has 129 places, 142 transitions, 799 flow [2024-11-08 16:07:09,697 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=755, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=799, PETRI_PLACES=129, PETRI_TRANSITIONS=142} [2024-11-08 16:07:09,697 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, 36 predicate places. [2024-11-08 16:07:09,697 INFO L471 AbstractCegarLoop]: Abstraction has has 129 places, 142 transitions, 799 flow [2024-11-08 16:07:09,698 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 67.28571428571429) internal successors, (471), 7 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:07:09,698 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:07:09,698 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, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:07:09,711 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-08 16:07:09,898 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-08 16:07:09,898 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2024-11-08 16:07:09,899 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:07:09,899 INFO L85 PathProgramCache]: Analyzing trace with hash -1897354961, now seen corresponding path program 1 times [2024-11-08 16:07:09,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:07:09,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591938864] [2024-11-08 16:07:09,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:07:09,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:07:09,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:07:10,386 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-08 16:07:10,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:07:10,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591938864] [2024-11-08 16:07:10,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591938864] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:07:10,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601701284] [2024-11-08 16:07:10,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:07:10,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:07:10,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:07:10,388 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:07:10,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-08 16:07:10,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:07:10,501 INFO L255 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-08 16:07:10,504 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:07:10,513 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-08 16:07:10,609 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-11-08 16:07:10,609 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2024-11-08 16:07:10,742 INFO L349 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2024-11-08 16:07:10,742 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 31 [2024-11-08 16:07:11,061 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-08 16:07:11,062 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:07:11,375 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-08 16:07:11,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601701284] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-08 16:07:11,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-08 16:07:11,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 6] total 18 [2024-11-08 16:07:11,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550289504] [2024-11-08 16:07:11,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:07:11,376 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-08 16:07:11,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:07:11,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-08 16:07:11,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2024-11-08 16:07:12,255 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 101 [2024-11-08 16:07:12,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 142 transitions, 799 flow. Second operand has 7 states, 7 states have (on average 66.57142857142857) internal successors, (466), 7 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:07:12,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:07:12,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 101 [2024-11-08 16:07:12,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:07:12,987 INFO L124 PetriNetUnfolderBase]: 1996/4369 cut-off events. [2024-11-08 16:07:12,987 INFO L125 PetriNetUnfolderBase]: For 9775/10642 co-relation queries the response was YES. [2024-11-08 16:07:12,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11465 conditions, 4369 events. 1996/4369 cut-off events. For 9775/10642 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 30147 event pairs, 645 based on Foata normal form. 18/3298 useless extension candidates. Maximal degree in co-relation 3815. Up to 1587 conditions per place. [2024-11-08 16:07:13,014 INFO L140 encePairwiseOnDemand]: 92/101 looper letters, 69 selfloop transitions, 12 changer transitions 0/156 dead transitions. [2024-11-08 16:07:13,014 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 156 transitions, 1032 flow [2024-11-08 16:07:13,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-08 16:07:13,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-08 16:07:13,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 498 transitions. [2024-11-08 16:07:13,016 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7043847241867044 [2024-11-08 16:07:13,016 INFO L175 Difference]: Start difference. First operand has 129 places, 142 transitions, 799 flow. Second operand 7 states and 498 transitions. [2024-11-08 16:07:13,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 156 transitions, 1032 flow [2024-11-08 16:07:13,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 156 transitions, 995 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-11-08 16:07:13,025 INFO L231 Difference]: Finished difference. Result has 130 places, 143 transitions, 810 flow [2024-11-08 16:07:13,026 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=769, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=810, PETRI_PLACES=130, PETRI_TRANSITIONS=143} [2024-11-08 16:07:13,026 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, 37 predicate places. [2024-11-08 16:07:13,026 INFO L471 AbstractCegarLoop]: Abstraction has has 130 places, 143 transitions, 810 flow [2024-11-08 16:07:13,027 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 66.57142857142857) internal successors, (466), 7 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:07:13,027 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:07:13,027 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, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:07:13,049 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-08 16:07:13,231 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:07:13,235 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2024-11-08 16:07:13,235 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:07:13,239 INFO L85 PathProgramCache]: Analyzing trace with hash 1311539097, now seen corresponding path program 1 times [2024-11-08 16:07:13,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:07:13,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665570667] [2024-11-08 16:07:13,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:07:13,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:07:13,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:07:13,341 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-08 16:07:13,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:07:13,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665570667] [2024-11-08 16:07:13,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665570667] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:07:13,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:07:13,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 16:07:13,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210260844] [2024-11-08 16:07:13,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:07:13,342 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 16:07:13,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:07:13,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 16:07:13,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 16:07:13,400 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 101 [2024-11-08 16:07:13,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 143 transitions, 810 flow. Second operand has 4 states, 4 states have (on average 63.5) internal successors, (254), 4 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:07:13,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:07:13,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 101 [2024-11-08 16:07:13,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:07:13,730 INFO L124 PetriNetUnfolderBase]: 1273/2833 cut-off events. [2024-11-08 16:07:13,730 INFO L125 PetriNetUnfolderBase]: For 6912/7587 co-relation queries the response was YES. [2024-11-08 16:07:13,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8221 conditions, 2833 events. 1273/2833 cut-off events. For 6912/7587 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 18270 event pairs, 702 based on Foata normal form. 42/2248 useless extension candidates. Maximal degree in co-relation 2732. Up to 1587 conditions per place. [2024-11-08 16:07:13,748 INFO L140 encePairwiseOnDemand]: 96/101 looper letters, 61 selfloop transitions, 4 changer transitions 0/140 dead transitions. [2024-11-08 16:07:13,748 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 140 transitions, 934 flow [2024-11-08 16:07:13,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 16:07:13,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-08 16:07:13,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 272 transitions. [2024-11-08 16:07:13,749 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6732673267326733 [2024-11-08 16:07:13,749 INFO L175 Difference]: Start difference. First operand has 130 places, 143 transitions, 810 flow. Second operand 4 states and 272 transitions. [2024-11-08 16:07:13,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 140 transitions, 934 flow [2024-11-08 16:07:13,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 140 transitions, 917 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-08 16:07:13,758 INFO L231 Difference]: Finished difference. Result has 125 places, 140 transitions, 795 flow [2024-11-08 16:07:13,759 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=787, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=795, PETRI_PLACES=125, PETRI_TRANSITIONS=140} [2024-11-08 16:07:13,759 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, 32 predicate places. [2024-11-08 16:07:13,759 INFO L471 AbstractCegarLoop]: Abstraction has has 125 places, 140 transitions, 795 flow [2024-11-08 16:07:13,760 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 63.5) internal successors, (254), 4 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:07:13,760 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:07:13,760 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, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:07:13,760 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-11-08 16:07:13,760 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2024-11-08 16:07:13,761 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:07:13,761 INFO L85 PathProgramCache]: Analyzing trace with hash 1311539098, now seen corresponding path program 1 times [2024-11-08 16:07:13,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:07:13,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374075974] [2024-11-08 16:07:13,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:07:13,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:07:13,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:07:13,935 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-08 16:07:13,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:07:13,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374075974] [2024-11-08 16:07:13,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374075974] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:07:13,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677492193] [2024-11-08 16:07:13,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:07:13,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:07:13,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:07:13,938 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:07:13,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-08 16:07:14,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:07:14,057 INFO L255 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-08 16:07:14,059 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:07:14,071 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-08 16:07:14,113 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 15 treesize of output 11 [2024-11-08 16:07:14,147 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-08 16:07:14,212 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-08 16:07:14,212 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:07:14,385 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-08 16:07:14,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677492193] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-08 16:07:14,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-08 16:07:14,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 6] total 11 [2024-11-08 16:07:14,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244029998] [2024-11-08 16:07:14,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:07:14,386 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-08 16:07:14,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:07:14,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-08 16:07:14,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-11-08 16:07:14,904 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 101 [2024-11-08 16:07:14,905 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 140 transitions, 795 flow. Second operand has 7 states, 7 states have (on average 67.57142857142857) internal successors, (473), 7 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:07:14,905 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:07:14,905 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 101 [2024-11-08 16:07:14,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:07:15,537 INFO L124 PetriNetUnfolderBase]: 1726/3889 cut-off events. [2024-11-08 16:07:15,537 INFO L125 PetriNetUnfolderBase]: For 7048/7732 co-relation queries the response was YES. [2024-11-08 16:07:15,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10779 conditions, 3889 events. 1726/3889 cut-off events. For 7048/7732 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 26424 event pairs, 618 based on Foata normal form. 81/3082 useless extension candidates. Maximal degree in co-relation 3584. Up to 1692 conditions per place. [2024-11-08 16:07:15,566 INFO L140 encePairwiseOnDemand]: 93/101 looper letters, 69 selfloop transitions, 11 changer transitions 0/154 dead transitions. [2024-11-08 16:07:15,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 154 transitions, 1026 flow [2024-11-08 16:07:15,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-08 16:07:15,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-08 16:07:15,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 504 transitions. [2024-11-08 16:07:15,568 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7128712871287128 [2024-11-08 16:07:15,568 INFO L175 Difference]: Start difference. First operand has 125 places, 140 transitions, 795 flow. Second operand 7 states and 504 transitions. [2024-11-08 16:07:15,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 154 transitions, 1026 flow [2024-11-08 16:07:15,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 154 transitions, 1021 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-08 16:07:15,579 INFO L231 Difference]: Finished difference. Result has 130 places, 141 transitions, 828 flow [2024-11-08 16:07:15,579 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=790, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=828, PETRI_PLACES=130, PETRI_TRANSITIONS=141} [2024-11-08 16:07:15,580 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, 37 predicate places. [2024-11-08 16:07:15,580 INFO L471 AbstractCegarLoop]: Abstraction has has 130 places, 141 transitions, 828 flow [2024-11-08 16:07:15,580 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 67.57142857142857) internal successors, (473), 7 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:07:15,580 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:07:15,581 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, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:07:15,602 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-08 16:07:15,785 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:07:15,785 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2024-11-08 16:07:15,785 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:07:15,785 INFO L85 PathProgramCache]: Analyzing trace with hash 708788717, now seen corresponding path program 1 times [2024-11-08 16:07:15,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:07:15,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749841095] [2024-11-08 16:07:15,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:07:15,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:07:15,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:07:16,463 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-08 16:07:16,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:07:16,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749841095] [2024-11-08 16:07:16,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749841095] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:07:16,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137858772] [2024-11-08 16:07:16,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:07:16,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:07:16,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:07:16,466 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:07:16,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-08 16:07:16,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:07:16,600 INFO L255 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-11-08 16:07:16,604 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:07:16,615 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-08 16:07:16,797 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-11-08 16:07:16,798 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 22 [2024-11-08 16:07:16,998 INFO L349 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2024-11-08 16:07:16,998 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 37 [2024-11-08 16:07:17,134 INFO L349 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2024-11-08 16:07:17,135 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 37 [2024-11-08 16:07:17,534 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-08 16:07:17,535 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:07:18,390 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-08 16:07:18,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137858772] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:07:18,391 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:07:18,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 9] total 26 [2024-11-08 16:07:18,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117173395] [2024-11-08 16:07:18,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:07:18,391 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-08 16:07:18,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:07:18,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-08 16:07:18,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=631, Unknown=0, NotChecked=0, Total=756 [2024-11-08 16:07:22,203 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 101 [2024-11-08 16:07:22,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 141 transitions, 828 flow. Second operand has 28 states, 28 states have (on average 38.142857142857146) internal successors, (1068), 28 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:07:22,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:07:22,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 101 [2024-11-08 16:07:22,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:07:25,176 INFO L124 PetriNetUnfolderBase]: 5776/8937 cut-off events. [2024-11-08 16:07:25,176 INFO L125 PetriNetUnfolderBase]: For 33139/35501 co-relation queries the response was YES. [2024-11-08 16:07:25,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32068 conditions, 8937 events. 5776/8937 cut-off events. For 33139/35501 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 52551 event pairs, 1164 based on Foata normal form. 0/8114 useless extension candidates. Maximal degree in co-relation 11035. Up to 2376 conditions per place. [2024-11-08 16:07:25,232 INFO L140 encePairwiseOnDemand]: 82/101 looper letters, 182 selfloop transitions, 45 changer transitions 0/252 dead transitions. [2024-11-08 16:07:25,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 252 transitions, 1943 flow [2024-11-08 16:07:25,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-08 16:07:25,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-11-08 16:07:25,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 933 transitions. [2024-11-08 16:07:25,235 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4198919891989199 [2024-11-08 16:07:25,235 INFO L175 Difference]: Start difference. First operand has 130 places, 141 transitions, 828 flow. Second operand 22 states and 933 transitions. [2024-11-08 16:07:25,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 252 transitions, 1943 flow [2024-11-08 16:07:25,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 252 transitions, 1884 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-08 16:07:25,254 INFO L231 Difference]: Finished difference. Result has 145 places, 145 transitions, 906 flow [2024-11-08 16:07:25,255 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=802, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=906, PETRI_PLACES=145, PETRI_TRANSITIONS=145} [2024-11-08 16:07:25,255 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, 52 predicate places. [2024-11-08 16:07:25,255 INFO L471 AbstractCegarLoop]: Abstraction has has 145 places, 145 transitions, 906 flow [2024-11-08 16:07:25,256 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 38.142857142857146) internal successors, (1068), 28 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:07:25,256 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:07:25,256 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:07:25,275 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-08 16:07:25,461 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-08 16:07:25,461 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2024-11-08 16:07:25,461 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:07:25,461 INFO L85 PathProgramCache]: Analyzing trace with hash 497614505, now seen corresponding path program 1 times [2024-11-08 16:07:25,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:07:25,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706900412] [2024-11-08 16:07:25,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:07:25,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:07:25,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:07:26,022 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-08 16:07:26,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:07:26,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706900412] [2024-11-08 16:07:26,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706900412] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:07:26,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686417107] [2024-11-08 16:07:26,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:07:26,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:07:26,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:07:26,025 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:07:26,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-08 16:07:26,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:07:26,154 INFO L255 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-11-08 16:07:26,156 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:07:26,206 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-08 16:07:26,313 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-11-08 16:07:26,313 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2024-11-08 16:07:26,453 INFO L349 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2024-11-08 16:07:26,453 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 34 [2024-11-08 16:07:26,761 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-08 16:07:26,761 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:07:27,524 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-08 16:07:27,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686417107] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:07:27,525 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:07:27,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 28 [2024-11-08 16:07:27,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247597041] [2024-11-08 16:07:27,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:07:27,525 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-08 16:07:27,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:07:27,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-08 16:07:27,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=727, Unknown=0, NotChecked=0, Total=870 [2024-11-08 16:07:30,217 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 101 [2024-11-08 16:07:30,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 145 transitions, 906 flow. Second operand has 30 states, 30 states have (on average 41.0) internal successors, (1230), 30 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:07:30,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:07:30,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 101 [2024-11-08 16:07:30,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:07:33,154 INFO L124 PetriNetUnfolderBase]: 5944/10026 cut-off events. [2024-11-08 16:07:33,154 INFO L125 PetriNetUnfolderBase]: For 25513/26894 co-relation queries the response was YES. [2024-11-08 16:07:33,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34160 conditions, 10026 events. 5944/10026 cut-off events. For 25513/26894 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 65920 event pairs, 1164 based on Foata normal form. 0/9432 useless extension candidates. Maximal degree in co-relation 27361. Up to 2376 conditions per place. [2024-11-08 16:07:33,231 INFO L140 encePairwiseOnDemand]: 85/101 looper letters, 186 selfloop transitions, 41 changer transitions 0/251 dead transitions. [2024-11-08 16:07:33,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 251 transitions, 1976 flow [2024-11-08 16:07:33,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-08 16:07:33,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-11-08 16:07:33,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 922 transitions. [2024-11-08 16:07:33,233 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45643564356435645 [2024-11-08 16:07:33,234 INFO L175 Difference]: Start difference. First operand has 145 places, 145 transitions, 906 flow. Second operand 20 states and 922 transitions. [2024-11-08 16:07:33,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 251 transitions, 1976 flow [2024-11-08 16:07:33,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 251 transitions, 1959 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-08 16:07:33,260 INFO L231 Difference]: Finished difference. Result has 158 places, 144 transitions, 969 flow [2024-11-08 16:07:33,260 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=887, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=969, PETRI_PLACES=158, PETRI_TRANSITIONS=144} [2024-11-08 16:07:33,261 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, 65 predicate places. [2024-11-08 16:07:33,261 INFO L471 AbstractCegarLoop]: Abstraction has has 158 places, 144 transitions, 969 flow [2024-11-08 16:07:33,262 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 41.0) internal successors, (1230), 30 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:07:33,262 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:07:33,262 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:07:33,278 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-08 16:07:33,466 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-11-08 16:07:33,466 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2024-11-08 16:07:33,466 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:07:33,466 INFO L85 PathProgramCache]: Analyzing trace with hash 523784509, now seen corresponding path program 1 times [2024-11-08 16:07:33,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:07:33,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695311919] [2024-11-08 16:07:33,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:07:33,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:07:33,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:07:33,589 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-08 16:07:33,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:07:33,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695311919] [2024-11-08 16:07:33,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695311919] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:07:33,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334273447] [2024-11-08 16:07:33,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:07:33,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:07:33,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:07:33,592 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:07:33,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-08 16:07:33,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:07:33,710 INFO L255 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-08 16:07:33,711 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:07:33,813 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-08 16:07:33,813 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:07:33,891 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-08 16:07:33,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334273447] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:07:33,892 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:07:33,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-08 16:07:33,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305029286] [2024-11-08 16:07:33,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:07:33,893 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-08 16:07:33,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:07:33,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-08 16:07:33,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2024-11-08 16:07:34,191 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 101 [2024-11-08 16:07:34,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 144 transitions, 969 flow. Second operand has 14 states, 14 states have (on average 53.357142857142854) internal successors, (747), 14 states have internal predecessors, (747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:07:34,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:07:34,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 101 [2024-11-08 16:07:34,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:07:35,122 INFO L124 PetriNetUnfolderBase]: 2956/5530 cut-off events. [2024-11-08 16:07:35,122 INFO L125 PetriNetUnfolderBase]: For 12842/13787 co-relation queries the response was YES. [2024-11-08 16:07:35,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18790 conditions, 5530 events. 2956/5530 cut-off events. For 12842/13787 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 34518 event pairs, 1074 based on Foata normal form. 8/4880 useless extension candidates. Maximal degree in co-relation 17378. Up to 2253 conditions per place. [2024-11-08 16:07:35,163 INFO L140 encePairwiseOnDemand]: 81/101 looper letters, 148 selfloop transitions, 55 changer transitions 0/233 dead transitions. [2024-11-08 16:07:35,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 233 transitions, 1818 flow [2024-11-08 16:07:35,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-08 16:07:35,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-08 16:07:35,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 757 transitions. [2024-11-08 16:07:35,165 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6245874587458746 [2024-11-08 16:07:35,165 INFO L175 Difference]: Start difference. First operand has 158 places, 144 transitions, 969 flow. Second operand 12 states and 757 transitions. [2024-11-08 16:07:35,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 233 transitions, 1818 flow [2024-11-08 16:07:35,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 233 transitions, 1710 flow, removed 0 selfloop flow, removed 17 redundant places. [2024-11-08 16:07:35,286 INFO L231 Difference]: Finished difference. Result has 155 places, 151 transitions, 1055 flow [2024-11-08 16:07:35,287 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=887, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1055, PETRI_PLACES=155, PETRI_TRANSITIONS=151} [2024-11-08 16:07:35,287 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, 62 predicate places. [2024-11-08 16:07:35,287 INFO L471 AbstractCegarLoop]: Abstraction has has 155 places, 151 transitions, 1055 flow [2024-11-08 16:07:35,288 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 53.357142857142854) internal successors, (747), 14 states have internal predecessors, (747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:07:35,288 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:07:35,289 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:07:35,309 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-08 16:07:35,489 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-11-08 16:07:35,489 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting thread3Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2024-11-08 16:07:35,489 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:07:35,490 INFO L85 PathProgramCache]: Analyzing trace with hash -1753818769, now seen corresponding path program 1 times [2024-11-08 16:07:35,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:07:35,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058729468] [2024-11-08 16:07:35,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:07:35,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:07:35,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:07:35,881 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-08 16:07:35,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:07:35,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058729468] [2024-11-08 16:07:35,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058729468] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:07:35,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293282455] [2024-11-08 16:07:35,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:07:35,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:07:35,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:07:35,884 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:07:35,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-08 16:07:36,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:07:36,011 INFO L255 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-08 16:07:36,013 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:07:36,069 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-08 16:07:36,127 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 15 treesize of output 11 [2024-11-08 16:07:36,187 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-08 16:07:36,438 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-08 16:07:36,438 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:07:36,902 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-08 16:07:36,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293282455] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:07:36,903 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:07:36,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 26 [2024-11-08 16:07:36,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052911211] [2024-11-08 16:07:36,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:07:36,903 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-08 16:07:36,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:07:36,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-08 16:07:36,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=617, Unknown=0, NotChecked=0, Total=756 [2024-11-08 16:07:40,311 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 101 [2024-11-08 16:07:40,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 151 transitions, 1055 flow. Second operand has 28 states, 28 states have (on average 48.214285714285715) internal successors, (1350), 28 states have internal predecessors, (1350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:07:40,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:07:40,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 101 [2024-11-08 16:07:40,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:07:41,700 INFO L124 PetriNetUnfolderBase]: 2474/4049 cut-off events. [2024-11-08 16:07:41,701 INFO L125 PetriNetUnfolderBase]: For 19078/21042 co-relation queries the response was YES. [2024-11-08 16:07:41,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16801 conditions, 4049 events. 2474/4049 cut-off events. For 19078/21042 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 21708 event pairs, 486 based on Foata normal form. 158/3930 useless extension candidates. Maximal degree in co-relation 13724. Up to 858 conditions per place. [2024-11-08 16:07:41,752 INFO L140 encePairwiseOnDemand]: 85/101 looper letters, 157 selfloop transitions, 41 changer transitions 0/229 dead transitions. [2024-11-08 16:07:41,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 229 transitions, 1957 flow [2024-11-08 16:07:41,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-08 16:07:41,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-08 16:07:41,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 823 transitions. [2024-11-08 16:07:41,755 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5432343234323432 [2024-11-08 16:07:41,756 INFO L175 Difference]: Start difference. First operand has 155 places, 151 transitions, 1055 flow. Second operand 15 states and 823 transitions. [2024-11-08 16:07:41,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 229 transitions, 1957 flow [2024-11-08 16:07:41,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 229 transitions, 1892 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-11-08 16:07:41,779 INFO L231 Difference]: Finished difference. Result has 163 places, 150 transitions, 1074 flow [2024-11-08 16:07:41,779 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=992, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1074, PETRI_PLACES=163, PETRI_TRANSITIONS=150} [2024-11-08 16:07:41,780 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, 70 predicate places. [2024-11-08 16:07:41,780 INFO L471 AbstractCegarLoop]: Abstraction has has 163 places, 150 transitions, 1074 flow [2024-11-08 16:07:41,781 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 48.214285714285715) internal successors, (1350), 28 states have internal predecessors, (1350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:07:41,781 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:07:41,781 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:07:41,802 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-08 16:07:41,986 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-11-08 16:07:41,986 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2024-11-08 16:07:41,986 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:07:41,986 INFO L85 PathProgramCache]: Analyzing trace with hash 744597124, now seen corresponding path program 1 times [2024-11-08 16:07:41,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:07:41,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392988974] [2024-11-08 16:07:41,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:07:41,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:07:42,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:07:42,196 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-08 16:07:42,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:07:42,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392988974] [2024-11-08 16:07:42,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392988974] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:07:42,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435861882] [2024-11-08 16:07:42,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:07:42,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:07:42,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:07:42,200 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:07:42,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-08 16:07:42,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:07:42,351 INFO L255 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-08 16:07:42,353 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:07:42,517 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-08 16:07:42,517 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:07:42,634 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-08 16:07:42,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435861882] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:07:42,635 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:07:42,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-11-08 16:07:42,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673150379] [2024-11-08 16:07:42,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:07:42,636 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-08 16:07:42,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:07:42,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-08 16:07:42,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2024-11-08 16:07:43,041 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 101 [2024-11-08 16:07:43,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 150 transitions, 1074 flow. Second operand has 16 states, 16 states have (on average 53.3125) internal successors, (853), 16 states have internal predecessors, (853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:07:43,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:07:43,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 101 [2024-11-08 16:07:43,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:07:43,996 INFO L124 PetriNetUnfolderBase]: 2940/5116 cut-off events. [2024-11-08 16:07:43,997 INFO L125 PetriNetUnfolderBase]: For 20130/21934 co-relation queries the response was YES. [2024-11-08 16:07:44,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19297 conditions, 5116 events. 2940/5116 cut-off events. For 20130/21934 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 29785 event pairs, 1092 based on Foata normal form. 62/4674 useless extension candidates. Maximal degree in co-relation 17957. Up to 2301 conditions per place. [2024-11-08 16:07:44,034 INFO L140 encePairwiseOnDemand]: 81/101 looper letters, 140 selfloop transitions, 55 changer transitions 0/227 dead transitions. [2024-11-08 16:07:44,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 227 transitions, 1872 flow [2024-11-08 16:07:44,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-08 16:07:44,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-08 16:07:44,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 753 transitions. [2024-11-08 16:07:44,036 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6212871287128713 [2024-11-08 16:07:44,036 INFO L175 Difference]: Start difference. First operand has 163 places, 150 transitions, 1074 flow. Second operand 12 states and 753 transitions. [2024-11-08 16:07:44,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 227 transitions, 1872 flow [2024-11-08 16:07:44,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 227 transitions, 1764 flow, removed 0 selfloop flow, removed 14 redundant places. [2024-11-08 16:07:44,054 INFO L231 Difference]: Finished difference. Result has 163 places, 157 transitions, 1160 flow [2024-11-08 16:07:44,054 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=992, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1160, PETRI_PLACES=163, PETRI_TRANSITIONS=157} [2024-11-08 16:07:44,055 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, 70 predicate places. [2024-11-08 16:07:44,055 INFO L471 AbstractCegarLoop]: Abstraction has has 163 places, 157 transitions, 1160 flow [2024-11-08 16:07:44,055 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 53.3125) internal successors, (853), 16 states have internal predecessors, (853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:07:44,055 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:07:44,055 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:07:44,071 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-08 16:07:44,256 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-08 16:07:44,256 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2024-11-08 16:07:44,256 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:07:44,256 INFO L85 PathProgramCache]: Analyzing trace with hash 754713882, now seen corresponding path program 1 times [2024-11-08 16:07:44,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:07:44,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811945442] [2024-11-08 16:07:44,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:07:44,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:07:44,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:07:44,371 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-08 16:07:44,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:07:44,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811945442] [2024-11-08 16:07:44,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811945442] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:07:44,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225067187] [2024-11-08 16:07:44,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:07:44,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:07:44,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:07:44,375 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:07:44,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-08 16:07:44,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:07:44,516 INFO L255 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-08 16:07:44,517 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:07:44,573 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-08 16:07:44,573 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:07:44,624 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-08 16:07:44,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225067187] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-08 16:07:44,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-08 16:07:44,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2024-11-08 16:07:44,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884203485] [2024-11-08 16:07:44,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:07:44,625 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 16:07:44,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:07:44,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 16:07:44,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-11-08 16:07:44,687 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 101 [2024-11-08 16:07:44,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 157 transitions, 1160 flow. Second operand has 5 states, 5 states have (on average 57.6) internal successors, (288), 5 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:07:44,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:07:44,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 101 [2024-11-08 16:07:44,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:07:45,294 INFO L124 PetriNetUnfolderBase]: 2381/4560 cut-off events. [2024-11-08 16:07:45,294 INFO L125 PetriNetUnfolderBase]: For 15352/16106 co-relation queries the response was YES. [2024-11-08 16:07:45,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16764 conditions, 4560 events. 2381/4560 cut-off events. For 15352/16106 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 28040 event pairs, 691 based on Foata normal form. 341/4545 useless extension candidates. Maximal degree in co-relation 15888. Up to 1694 conditions per place. [2024-11-08 16:07:45,322 INFO L140 encePairwiseOnDemand]: 94/101 looper letters, 134 selfloop transitions, 8 changer transitions 0/174 dead transitions. [2024-11-08 16:07:45,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 174 transitions, 1551 flow [2024-11-08 16:07:45,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 16:07:45,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-08 16:07:45,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 309 transitions. [2024-11-08 16:07:45,323 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6118811881188119 [2024-11-08 16:07:45,323 INFO L175 Difference]: Start difference. First operand has 163 places, 157 transitions, 1160 flow. Second operand 5 states and 309 transitions. [2024-11-08 16:07:45,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 174 transitions, 1551 flow [2024-11-08 16:07:45,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 174 transitions, 1486 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-11-08 16:07:45,338 INFO L231 Difference]: Finished difference. Result has 163 places, 153 transitions, 1095 flow [2024-11-08 16:07:45,339 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=1058, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1095, PETRI_PLACES=163, PETRI_TRANSITIONS=153} [2024-11-08 16:07:45,339 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, 70 predicate places. [2024-11-08 16:07:45,339 INFO L471 AbstractCegarLoop]: Abstraction has has 163 places, 153 transitions, 1095 flow [2024-11-08 16:07:45,339 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 57.6) internal successors, (288), 5 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:07:45,339 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:07:45,339 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:07:45,358 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-08 16:07:45,540 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-08 16:07:45,540 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2024-11-08 16:07:45,540 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:07:45,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1753639334, now seen corresponding path program 2 times [2024-11-08 16:07:45,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:07:45,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809267382] [2024-11-08 16:07:45,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:07:45,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:07:45,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:07:46,386 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-08 16:07:46,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:07:46,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809267382] [2024-11-08 16:07:46,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809267382] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:07:46,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489778033] [2024-11-08 16:07:46,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 16:07:46,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:07:46,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:07:46,387 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:07:46,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-08 16:07:46,516 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 16:07:46,516 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:07:46,518 INFO L255 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-11-08 16:07:46,520 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:07:46,523 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-08 16:07:46,642 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-11-08 16:07:46,642 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 22 [2024-11-08 16:07:46,759 INFO L349 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2024-11-08 16:07:46,759 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 34 [2024-11-08 16:07:46,879 INFO L349 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2024-11-08 16:07:46,879 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 28 [2024-11-08 16:07:47,516 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-08 16:07:47,516 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:07:48,172 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-08 16:07:48,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489778033] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:07:48,172 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:07:48,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 7] total 26 [2024-11-08 16:07:48,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430232109] [2024-11-08 16:07:48,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:07:48,173 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-08 16:07:48,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:07:48,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-08 16:07:48,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2024-11-08 16:07:54,179 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 101 [2024-11-08 16:07:54,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 153 transitions, 1095 flow. Second operand has 28 states, 28 states have (on average 40.67857142857143) internal successors, (1139), 28 states have internal predecessors, (1139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:07:54,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:07:54,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 101 [2024-11-08 16:07:54,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:07:57,597 INFO L124 PetriNetUnfolderBase]: 6173/10406 cut-off events. [2024-11-08 16:07:57,597 INFO L125 PetriNetUnfolderBase]: For 37135/38982 co-relation queries the response was YES. [2024-11-08 16:07:57,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38429 conditions, 10406 events. 6173/10406 cut-off events. For 37135/38982 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 67219 event pairs, 2043 based on Foata normal form. 184/10416 useless extension candidates. Maximal degree in co-relation 35541. Up to 3076 conditions per place. [2024-11-08 16:07:57,667 INFO L140 encePairwiseOnDemand]: 86/101 looper letters, 184 selfloop transitions, 39 changer transitions 0/251 dead transitions. [2024-11-08 16:07:57,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 251 transitions, 1995 flow [2024-11-08 16:07:57,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-08 16:07:57,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-08 16:07:57,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 804 transitions. [2024-11-08 16:07:57,669 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.46825859056493885 [2024-11-08 16:07:57,669 INFO L175 Difference]: Start difference. First operand has 163 places, 153 transitions, 1095 flow. Second operand 17 states and 804 transitions. [2024-11-08 16:07:57,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 251 transitions, 1995 flow [2024-11-08 16:07:57,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 251 transitions, 1980 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-11-08 16:07:57,709 INFO L231 Difference]: Finished difference. Result has 179 places, 157 transitions, 1209 flow [2024-11-08 16:07:57,709 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=1084, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1209, PETRI_PLACES=179, PETRI_TRANSITIONS=157} [2024-11-08 16:07:57,709 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, 86 predicate places. [2024-11-08 16:07:57,709 INFO L471 AbstractCegarLoop]: Abstraction has has 179 places, 157 transitions, 1209 flow [2024-11-08 16:07:57,710 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 40.67857142857143) internal successors, (1139), 28 states have internal predecessors, (1139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:07:57,710 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:07:57,710 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:07:57,727 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-08 16:07:57,911 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-08 16:07:57,911 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2024-11-08 16:07:57,915 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:07:57,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1471754766, now seen corresponding path program 1 times [2024-11-08 16:07:57,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:07:57,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538220044] [2024-11-08 16:07:57,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:07:57,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:07:58,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:07:58,807 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-08 16:07:58,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:07:58,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538220044] [2024-11-08 16:07:58,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538220044] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:07:58,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059488571] [2024-11-08 16:07:58,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:07:58,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:07:58,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:07:58,810 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:07:58,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-08 16:07:58,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:07:58,959 INFO L255 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-08 16:07:58,962 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:07:58,985 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-08 16:07:58,990 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-08 16:07:59,088 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-08 16:07:59,089 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-08 16:07:59,095 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-08 16:07:59,202 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2024-11-08 16:07:59,203 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2024-11-08 16:07:59,783 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-08 16:07:59,784 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:08:00,387 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-08 16:08:00,389 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-08 16:08:00,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059488571] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:08:00,390 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:08:00,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 8] total 29 [2024-11-08 16:08:00,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849023717] [2024-11-08 16:08:00,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:08:00,390 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-08 16:08:00,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:08:00,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-08 16:08:00,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=736, Unknown=0, NotChecked=0, Total=870 [2024-11-08 16:08:06,133 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 101 [2024-11-08 16:08:06,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 157 transitions, 1209 flow. Second operand has 30 states, 30 states have (on average 45.4) internal successors, (1362), 30 states have internal predecessors, (1362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:08:06,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:08:06,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 101 [2024-11-08 16:08:06,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:08:09,136 INFO L124 PetriNetUnfolderBase]: 3534/6154 cut-off events. [2024-11-08 16:08:09,136 INFO L125 PetriNetUnfolderBase]: For 26492/28215 co-relation queries the response was YES. [2024-11-08 16:08:09,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24809 conditions, 6154 events. 3534/6154 cut-off events. For 26492/28215 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 37008 event pairs, 1074 based on Foata normal form. 141/6005 useless extension candidates. Maximal degree in co-relation 23447. Up to 1714 conditions per place. [2024-11-08 16:08:09,188 INFO L140 encePairwiseOnDemand]: 86/101 looper letters, 168 selfloop transitions, 38 changer transitions 0/239 dead transitions. [2024-11-08 16:08:09,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 239 transitions, 2007 flow [2024-11-08 16:08:09,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-08 16:08:09,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-11-08 16:08:09,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1169 transitions. [2024-11-08 16:08:09,191 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4822607260726073 [2024-11-08 16:08:09,191 INFO L175 Difference]: Start difference. First operand has 179 places, 157 transitions, 1209 flow. Second operand 24 states and 1169 transitions. [2024-11-08 16:08:09,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 239 transitions, 2007 flow [2024-11-08 16:08:09,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 239 transitions, 1927 flow, removed 2 selfloop flow, removed 14 redundant places. [2024-11-08 16:08:09,237 INFO L231 Difference]: Finished difference. Result has 191 places, 159 transitions, 1233 flow [2024-11-08 16:08:09,238 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=1129, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1233, PETRI_PLACES=191, PETRI_TRANSITIONS=159} [2024-11-08 16:08:09,238 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, 98 predicate places. [2024-11-08 16:08:09,239 INFO L471 AbstractCegarLoop]: Abstraction has has 191 places, 159 transitions, 1233 flow [2024-11-08 16:08:09,239 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 45.4) internal successors, (1362), 30 states have internal predecessors, (1362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:08:09,240 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:08:09,240 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:08:09,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-11-08 16:08:09,440 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-08 16:08:09,440 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2024-11-08 16:08:09,441 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:08:09,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1519077549, now seen corresponding path program 2 times [2024-11-08 16:08:09,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:08:09,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002074046] [2024-11-08 16:08:09,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:08:09,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:08:09,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:08:10,005 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-08 16:08:10,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:08:10,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002074046] [2024-11-08 16:08:10,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002074046] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:08:10,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792300502] [2024-11-08 16:08:10,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 16:08:10,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:08:10,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:08:10,009 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:08:10,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-08 16:08:10,208 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 16:08:10,208 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:08:10,210 INFO L255 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-08 16:08:10,213 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:08:10,217 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-08 16:08:10,222 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-08 16:08:10,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 16:08:10,330 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-08 16:08:10,349 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-08 16:08:10,349 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2024-11-08 16:08:10,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 16:08:10,423 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-08 16:08:10,433 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-08 16:08:10,433 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-08 16:08:10,493 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-08 16:08:10,494 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-11-08 16:08:10,733 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-08 16:08:10,733 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:08:12,065 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-08 16:08:12,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792300502] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:08:12,066 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:08:12,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 10] total 27 [2024-11-08 16:08:12,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148239643] [2024-11-08 16:08:12,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:08:12,067 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-08 16:08:12,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:08:12,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-08 16:08:12,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=691, Unknown=0, NotChecked=0, Total=812 [2024-11-08 16:08:17,510 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 101 [2024-11-08 16:08:17,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 159 transitions, 1233 flow. Second operand has 29 states, 29 states have (on average 53.44827586206897) internal successors, (1550), 29 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:08:17,512 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:08:17,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 101 [2024-11-08 16:08:17,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:08:20,224 INFO L124 PetriNetUnfolderBase]: 5453/10624 cut-off events. [2024-11-08 16:08:20,224 INFO L125 PetriNetUnfolderBase]: For 59659/61141 co-relation queries the response was YES. [2024-11-08 16:08:20,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39331 conditions, 10624 events. 5453/10624 cut-off events. For 59659/61141 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 79357 event pairs, 1638 based on Foata normal form. 178/10689 useless extension candidates. Maximal degree in co-relation 36937. Up to 2920 conditions per place. [2024-11-08 16:08:20,327 INFO L140 encePairwiseOnDemand]: 87/101 looper letters, 140 selfloop transitions, 39 changer transitions 0/252 dead transitions. [2024-11-08 16:08:20,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 252 transitions, 2167 flow [2024-11-08 16:08:20,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-08 16:08:20,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-08 16:08:20,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 804 transitions. [2024-11-08 16:08:20,329 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6123381568926123 [2024-11-08 16:08:20,329 INFO L175 Difference]: Start difference. First operand has 191 places, 159 transitions, 1233 flow. Second operand 13 states and 804 transitions. [2024-11-08 16:08:20,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 252 transitions, 2167 flow [2024-11-08 16:08:20,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 252 transitions, 2086 flow, removed 0 selfloop flow, removed 15 redundant places. [2024-11-08 16:08:20,371 INFO L231 Difference]: Finished difference. Result has 191 places, 163 transitions, 1301 flow [2024-11-08 16:08:20,372 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=1175, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1301, PETRI_PLACES=191, PETRI_TRANSITIONS=163} [2024-11-08 16:08:20,372 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, 98 predicate places. [2024-11-08 16:08:20,373 INFO L471 AbstractCegarLoop]: Abstraction has has 191 places, 163 transitions, 1301 flow [2024-11-08 16:08:20,374 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 53.44827586206897) internal successors, (1550), 29 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:08:20,374 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:08:20,374 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:08:20,389 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-08 16:08:20,576 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:08:20,576 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2024-11-08 16:08:20,576 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:08:20,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1620243240, now seen corresponding path program 1 times [2024-11-08 16:08:20,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:08:20,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90400757] [2024-11-08 16:08:20,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:08:20,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:08:20,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:08:21,332 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-08 16:08:21,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:08:21,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90400757] [2024-11-08 16:08:21,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90400757] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:08:21,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995800261] [2024-11-08 16:08:21,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:08:21,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:08:21,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:08:21,335 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:08:21,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-08 16:08:21,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:08:21,496 INFO L255 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-11-08 16:08:21,498 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:08:21,523 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-08 16:08:21,703 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2024-11-08 16:08:21,703 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2024-11-08 16:08:22,219 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-08 16:08:22,219 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:08:22,656 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-08 16:08:22,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995800261] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:08:22,657 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:08:22,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 7] total 24 [2024-11-08 16:08:22,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862670136] [2024-11-08 16:08:22,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:08:22,657 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-08 16:08:22,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:08:22,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-08 16:08:22,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2024-11-08 16:08:27,219 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 101 [2024-11-08 16:08:27,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 163 transitions, 1301 flow. Second operand has 25 states, 25 states have (on average 46.72) internal successors, (1168), 25 states have internal predecessors, (1168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:08:27,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:08:27,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 101 [2024-11-08 16:08:27,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:08:29,852 INFO L124 PetriNetUnfolderBase]: 3733/7386 cut-off events. [2024-11-08 16:08:29,853 INFO L125 PetriNetUnfolderBase]: For 40374/42260 co-relation queries the response was YES. [2024-11-08 16:08:29,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30567 conditions, 7386 events. 3733/7386 cut-off events. For 40374/42260 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 51720 event pairs, 1164 based on Foata normal form. 116/7201 useless extension candidates. Maximal degree in co-relation 29220. Up to 2200 conditions per place. [2024-11-08 16:08:29,927 INFO L140 encePairwiseOnDemand]: 87/101 looper letters, 148 selfloop transitions, 35 changer transitions 0/222 dead transitions. [2024-11-08 16:08:29,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 222 transitions, 1970 flow [2024-11-08 16:08:29,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-08 16:08:29,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-08 16:08:29,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 782 transitions. [2024-11-08 16:08:29,931 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5161716171617162 [2024-11-08 16:08:29,931 INFO L175 Difference]: Start difference. First operand has 191 places, 163 transitions, 1301 flow. Second operand 15 states and 782 transitions. [2024-11-08 16:08:29,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 222 transitions, 1970 flow [2024-11-08 16:08:29,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 222 transitions, 1880 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-11-08 16:08:29,974 INFO L231 Difference]: Finished difference. Result has 197 places, 163 transitions, 1300 flow [2024-11-08 16:08:29,974 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=1225, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1300, PETRI_PLACES=197, PETRI_TRANSITIONS=163} [2024-11-08 16:08:29,975 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, 104 predicate places. [2024-11-08 16:08:29,975 INFO L471 AbstractCegarLoop]: Abstraction has has 197 places, 163 transitions, 1300 flow [2024-11-08 16:08:29,975 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 46.72) internal successors, (1168), 25 states have internal predecessors, (1168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:08:29,975 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:08:29,976 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:08:29,990 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-11-08 16:08:30,176 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:08:30,177 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2024-11-08 16:08:30,177 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:08:30,177 INFO L85 PathProgramCache]: Analyzing trace with hash -153235494, now seen corresponding path program 1 times [2024-11-08 16:08:30,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:08:30,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565258006] [2024-11-08 16:08:30,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:08:30,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:08:30,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:08:31,108 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-08 16:08:31,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:08:31,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565258006] [2024-11-08 16:08:31,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565258006] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:08:31,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879534439] [2024-11-08 16:08:31,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:08:31,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:08:31,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:08:31,110 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:08:31,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-08 16:08:31,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:08:31,257 INFO L255 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-11-08 16:08:31,259 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:08:31,277 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-08 16:08:31,355 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-11-08 16:08:31,355 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 22 [2024-11-08 16:08:31,580 INFO L349 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2024-11-08 16:08:31,580 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 31 [2024-11-08 16:08:32,136 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-08 16:08:32,136 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:08:32,703 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-08 16:08:32,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879534439] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:08:32,704 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:08:32,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 8] total 28 [2024-11-08 16:08:32,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591316888] [2024-11-08 16:08:32,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:08:32,704 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-08 16:08:32,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:08:32,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-08 16:08:32,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=716, Unknown=0, NotChecked=0, Total=812 [2024-11-08 16:08:39,503 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 101 [2024-11-08 16:08:39,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 163 transitions, 1300 flow. Second operand has 29 states, 29 states have (on average 42.827586206896555) internal successors, (1242), 29 states have internal predecessors, (1242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:08:39,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:08:39,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 101 [2024-11-08 16:08:39,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:08:43,430 INFO L124 PetriNetUnfolderBase]: 6370/10358 cut-off events. [2024-11-08 16:08:43,430 INFO L125 PetriNetUnfolderBase]: For 90236/94526 co-relation queries the response was YES. [2024-11-08 16:08:43,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47267 conditions, 10358 events. 6370/10358 cut-off events. For 90236/94526 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 64451 event pairs, 1102 based on Foata normal form. 214/10200 useless extension candidates. Maximal degree in co-relation 45184. Up to 2042 conditions per place. [2024-11-08 16:08:43,519 INFO L140 encePairwiseOnDemand]: 86/101 looper letters, 201 selfloop transitions, 40 changer transitions 0/270 dead transitions. [2024-11-08 16:08:43,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 270 transitions, 2494 flow [2024-11-08 16:08:43,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-08 16:08:43,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-08 16:08:43,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 841 transitions. [2024-11-08 16:08:43,521 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4898078043098428 [2024-11-08 16:08:43,521 INFO L175 Difference]: Start difference. First operand has 197 places, 163 transitions, 1300 flow. Second operand 17 states and 841 transitions. [2024-11-08 16:08:43,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 270 transitions, 2494 flow [2024-11-08 16:08:43,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 270 transitions, 2381 flow, removed 0 selfloop flow, removed 15 redundant places. [2024-11-08 16:08:43,569 INFO L231 Difference]: Finished difference. Result has 201 places, 166 transitions, 1350 flow [2024-11-08 16:08:43,570 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=1217, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1350, PETRI_PLACES=201, PETRI_TRANSITIONS=166} [2024-11-08 16:08:43,570 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, 108 predicate places. [2024-11-08 16:08:43,570 INFO L471 AbstractCegarLoop]: Abstraction has has 201 places, 166 transitions, 1350 flow [2024-11-08 16:08:43,571 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 42.827586206896555) internal successors, (1242), 29 states have internal predecessors, (1242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:08:43,571 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:08:43,572 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:08:43,599 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-08 16:08:43,772 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:08:43,772 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2024-11-08 16:08:43,773 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:08:43,773 INFO L85 PathProgramCache]: Analyzing trace with hash -667571845, now seen corresponding path program 1 times [2024-11-08 16:08:43,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:08:43,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092255302] [2024-11-08 16:08:43,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:08:43,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:08:43,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:08:43,947 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 16:08:43,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:08:43,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092255302] [2024-11-08 16:08:43,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092255302] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:08:43,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396321294] [2024-11-08 16:08:43,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:08:43,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:08:43,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:08:43,953 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:08:43,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-08 16:08:44,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:08:44,144 INFO L255 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-08 16:08:44,146 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:08:44,294 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 16:08:44,295 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:08:44,429 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 16:08:44,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396321294] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-08 16:08:44,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-08 16:08:44,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2024-11-08 16:08:44,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277588703] [2024-11-08 16:08:44,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:08:44,430 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-08 16:08:44,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:08:44,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-08 16:08:44,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2024-11-08 16:08:44,606 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 101 [2024-11-08 16:08:44,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 166 transitions, 1350 flow. Second operand has 7 states, 7 states have (on average 51.714285714285715) internal successors, (362), 7 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:08:44,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:08:44,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 101 [2024-11-08 16:08:44,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:08:47,587 INFO L124 PetriNetUnfolderBase]: 8444/13757 cut-off events. [2024-11-08 16:08:47,588 INFO L125 PetriNetUnfolderBase]: For 121032/126216 co-relation queries the response was YES. [2024-11-08 16:08:47,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63375 conditions, 13757 events. 8444/13757 cut-off events. For 121032/126216 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 91443 event pairs, 2576 based on Foata normal form. 430/13978 useless extension candidates. Maximal degree in co-relation 60275. Up to 5252 conditions per place. [2024-11-08 16:08:47,694 INFO L140 encePairwiseOnDemand]: 89/101 looper letters, 243 selfloop transitions, 44 changer transitions 0/317 dead transitions. [2024-11-08 16:08:47,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 317 transitions, 3245 flow [2024-11-08 16:08:47,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-08 16:08:47,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-08 16:08:47,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 647 transitions. [2024-11-08 16:08:47,696 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5823582358235824 [2024-11-08 16:08:47,696 INFO L175 Difference]: Start difference. First operand has 201 places, 166 transitions, 1350 flow. Second operand 11 states and 647 transitions. [2024-11-08 16:08:47,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 317 transitions, 3245 flow [2024-11-08 16:08:47,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 317 transitions, 3142 flow, removed 3 selfloop flow, removed 15 redundant places. [2024-11-08 16:08:47,789 INFO L231 Difference]: Finished difference. Result has 202 places, 197 transitions, 1639 flow [2024-11-08 16:08:47,789 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=1263, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1639, PETRI_PLACES=202, PETRI_TRANSITIONS=197} [2024-11-08 16:08:47,789 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, 109 predicate places. [2024-11-08 16:08:47,789 INFO L471 AbstractCegarLoop]: Abstraction has has 202 places, 197 transitions, 1639 flow [2024-11-08 16:08:47,790 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 51.714285714285715) internal successors, (362), 7 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:08:47,790 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:08:47,790 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:08:47,805 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-11-08 16:08:47,990 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:08:47,990 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2024-11-08 16:08:47,991 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:08:47,991 INFO L85 PathProgramCache]: Analyzing trace with hash -1374067691, now seen corresponding path program 2 times [2024-11-08 16:08:47,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:08:47,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270184176] [2024-11-08 16:08:47,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:08:47,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:08:48,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:08:48,160 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 16:08:48,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:08:48,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270184176] [2024-11-08 16:08:48,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270184176] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:08:48,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862970403] [2024-11-08 16:08:48,161 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 16:08:48,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:08:48,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:08:48,163 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:08:48,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-08 16:08:48,301 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-08 16:08:48,301 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:08:48,302 INFO L255 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-08 16:08:48,303 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:08:48,355 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-08 16:08:48,355 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 16:08:48,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862970403] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:08:48,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-08 16:08:48,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 12 [2024-11-08 16:08:48,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117724095] [2024-11-08 16:08:48,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:08:48,356 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-08 16:08:48,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:08:48,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-08 16:08:48,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2024-11-08 16:08:48,452 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 101 [2024-11-08 16:08:48,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 197 transitions, 1639 flow. Second operand has 6 states, 6 states have (on average 65.33333333333333) internal successors, (392), 6 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:08:48,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:08:48,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 101 [2024-11-08 16:08:48,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:08:51,737 INFO L124 PetriNetUnfolderBase]: 10465/16913 cut-off events. [2024-11-08 16:08:51,737 INFO L125 PetriNetUnfolderBase]: For 176681/183773 co-relation queries the response was YES. [2024-11-08 16:08:51,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86828 conditions, 16913 events. 10465/16913 cut-off events. For 176681/183773 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 116769 event pairs, 3602 based on Foata normal form. 77/16577 useless extension candidates. Maximal degree in co-relation 75712. Up to 7831 conditions per place. [2024-11-08 16:08:51,906 INFO L140 encePairwiseOnDemand]: 91/101 looper letters, 274 selfloop transitions, 35 changer transitions 37/420 dead transitions. [2024-11-08 16:08:51,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 420 transitions, 4758 flow [2024-11-08 16:08:51,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-08 16:08:51,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-08 16:08:51,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 784 transitions. [2024-11-08 16:08:51,908 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7056705670567057 [2024-11-08 16:08:51,908 INFO L175 Difference]: Start difference. First operand has 202 places, 197 transitions, 1639 flow. Second operand 11 states and 784 transitions. [2024-11-08 16:08:51,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 420 transitions, 4758 flow [2024-11-08 16:08:52,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 420 transitions, 4753 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-11-08 16:08:52,171 INFO L231 Difference]: Finished difference. Result has 218 places, 226 transitions, 2104 flow [2024-11-08 16:08:52,171 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=1634, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2104, PETRI_PLACES=218, PETRI_TRANSITIONS=226} [2024-11-08 16:08:52,172 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, 125 predicate places. [2024-11-08 16:08:52,172 INFO L471 AbstractCegarLoop]: Abstraction has has 218 places, 226 transitions, 2104 flow [2024-11-08 16:08:52,172 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 65.33333333333333) internal successors, (392), 6 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:08:52,172 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:08:52,172 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:08:52,189 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-11-08 16:08:52,373 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:08:52,373 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2024-11-08 16:08:52,373 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:08:52,373 INFO L85 PathProgramCache]: Analyzing trace with hash 1938327399, now seen corresponding path program 3 times [2024-11-08 16:08:52,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:08:52,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698842165] [2024-11-08 16:08:52,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:08:52,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:08:52,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:08:52,550 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 16:08:52,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:08:52,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698842165] [2024-11-08 16:08:52,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698842165] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:08:52,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829818974] [2024-11-08 16:08:52,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-08 16:08:52,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:08:52,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:08:52,553 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:08:52,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-08 16:08:52,699 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-11-08 16:08:52,700 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:08:52,701 INFO L255 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-08 16:08:52,703 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:08:52,775 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-08 16:08:52,775 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 16:08:52,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829818974] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:08:52,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-08 16:08:52,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 12 [2024-11-08 16:08:52,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276111015] [2024-11-08 16:08:52,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:08:52,776 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-08 16:08:52,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:08:52,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-08 16:08:52,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-11-08 16:08:52,899 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 101 [2024-11-08 16:08:52,900 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 226 transitions, 2104 flow. Second operand has 6 states, 6 states have (on average 65.33333333333333) internal successors, (392), 6 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:08:52,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:08:52,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 101 [2024-11-08 16:08:52,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:08:56,950 INFO L124 PetriNetUnfolderBase]: 12028/19228 cut-off events. [2024-11-08 16:08:56,950 INFO L125 PetriNetUnfolderBase]: For 228368/236595 co-relation queries the response was YES. [2024-11-08 16:08:57,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108068 conditions, 19228 events. 12028/19228 cut-off events. For 228368/236595 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 132068 event pairs, 5091 based on Foata normal form. 206/18687 useless extension candidates. Maximal degree in co-relation 107302. Up to 10940 conditions per place. [2024-11-08 16:08:57,155 INFO L140 encePairwiseOnDemand]: 91/101 looper letters, 210 selfloop transitions, 69 changer transitions 33/386 dead transitions. [2024-11-08 16:08:57,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 386 transitions, 4563 flow [2024-11-08 16:08:57,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-08 16:08:57,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-08 16:08:57,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 719 transitions. [2024-11-08 16:08:57,159 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7118811881188118 [2024-11-08 16:08:57,159 INFO L175 Difference]: Start difference. First operand has 218 places, 226 transitions, 2104 flow. Second operand 10 states and 719 transitions. [2024-11-08 16:08:57,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 386 transitions, 4563 flow [2024-11-08 16:08:58,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 386 transitions, 4531 flow, removed 16 selfloop flow, removed 0 redundant places. [2024-11-08 16:08:58,055 INFO L231 Difference]: Finished difference. Result has 232 places, 271 transitions, 2941 flow [2024-11-08 16:08:58,055 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=2096, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2941, PETRI_PLACES=232, PETRI_TRANSITIONS=271} [2024-11-08 16:08:58,056 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, 139 predicate places. [2024-11-08 16:08:58,056 INFO L471 AbstractCegarLoop]: Abstraction has has 232 places, 271 transitions, 2941 flow [2024-11-08 16:08:58,056 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 65.33333333333333) internal successors, (392), 6 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:08:58,056 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:08:58,056 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:08:58,070 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-11-08 16:08:58,257 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:08:58,257 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2024-11-08 16:08:58,257 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:08:58,258 INFO L85 PathProgramCache]: Analyzing trace with hash -1708701547, now seen corresponding path program 4 times [2024-11-08 16:08:58,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:08:58,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135934022] [2024-11-08 16:08:58,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:08:58,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:08:58,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:08:58,461 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 16:08:58,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:08:58,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135934022] [2024-11-08 16:08:58,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135934022] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:08:58,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6357081] [2024-11-08 16:08:58,462 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-08 16:08:58,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:08:58,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:08:58,465 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:08:58,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-08 16:08:58,632 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-08 16:08:58,633 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:08:58,634 INFO L255 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-08 16:08:58,636 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:08:58,735 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 16:08:58,736 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:08:58,827 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 16:08:58,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6357081] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:08:58,828 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:08:58,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-11-08 16:08:58,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241253827] [2024-11-08 16:08:58,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:08:58,829 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-08 16:08:58,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:08:58,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-08 16:08:58,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2024-11-08 16:08:59,427 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 101 [2024-11-08 16:08:59,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 271 transitions, 2941 flow. Second operand has 14 states, 14 states have (on average 47.357142857142854) internal successors, (663), 14 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:08:59,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:08:59,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 101 [2024-11-08 16:08:59,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:09:18,064 INFO L124 PetriNetUnfolderBase]: 51757/84186 cut-off events. [2024-11-08 16:09:18,064 INFO L125 PetriNetUnfolderBase]: For 682818/689314 co-relation queries the response was YES. [2024-11-08 16:09:18,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 409391 conditions, 84186 events. 51757/84186 cut-off events. For 682818/689314 co-relation queries the response was YES. Maximal size of possible extension queue 1528. Compared 675533 event pairs, 1935 based on Foata normal form. 1392/84781 useless extension candidates. Maximal degree in co-relation 407585. Up to 19285 conditions per place. [2024-11-08 16:09:19,001 INFO L140 encePairwiseOnDemand]: 77/101 looper letters, 489 selfloop transitions, 387 changer transitions 0/901 dead transitions. [2024-11-08 16:09:19,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 901 transitions, 11584 flow [2024-11-08 16:09:19,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-08 16:09:19,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-11-08 16:09:19,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1329 transitions. [2024-11-08 16:09:19,003 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5482673267326733 [2024-11-08 16:09:19,004 INFO L175 Difference]: Start difference. First operand has 232 places, 271 transitions, 2941 flow. Second operand 24 states and 1329 transitions. [2024-11-08 16:09:19,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 901 transitions, 11584 flow [2024-11-08 16:09:31,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 901 transitions, 11448 flow, removed 68 selfloop flow, removed 0 redundant places. [2024-11-08 16:09:31,776 INFO L231 Difference]: Finished difference. Result has 275 places, 580 transitions, 8268 flow [2024-11-08 16:09:31,777 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=2897, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=8268, PETRI_PLACES=275, PETRI_TRANSITIONS=580} [2024-11-08 16:09:31,777 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, 182 predicate places. [2024-11-08 16:09:31,777 INFO L471 AbstractCegarLoop]: Abstraction has has 275 places, 580 transitions, 8268 flow [2024-11-08 16:09:31,778 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 47.357142857142854) internal successors, (663), 14 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:09:31,778 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:09:31,778 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:09:31,791 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-11-08 16:09:31,978 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:09:31,978 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2024-11-08 16:09:31,979 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:09:31,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1091299117, now seen corresponding path program 5 times [2024-11-08 16:09:31,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:09:31,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859323316] [2024-11-08 16:09:31,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:09:31,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:09:31,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:09:32,139 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 16:09:32,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:09:32,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859323316] [2024-11-08 16:09:32,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859323316] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:09:32,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192339884] [2024-11-08 16:09:32,139 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-08 16:09:32,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:09:32,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:09:32,142 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:09:32,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c64a4be-5c5b-4843-9b16-268eb6eda98d/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-08 16:09:32,302 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 16:09:32,302 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:09:32,304 INFO L255 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-08 16:09:32,306 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:09:32,393 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 16:09:32,393 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:09:32,471 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 16:09:32,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192339884] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:09:32,472 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:09:32,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-11-08 16:09:32,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259315769] [2024-11-08 16:09:32,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:09:32,474 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-08 16:09:32,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:09:32,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-08 16:09:32,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2024-11-08 16:09:33,028 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 101 [2024-11-08 16:09:33,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 580 transitions, 8268 flow. Second operand has 15 states, 15 states have (on average 47.53333333333333) internal successors, (713), 15 states have internal predecessors, (713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:09:33,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:09:33,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 101 [2024-11-08 16:09:33,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand