./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/chl-array-int-trans.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 6497de01 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0055ad1-84ac-4722-8f5f-b023e919c762/bin/uautomizer-verify-LYvppIcaGC/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0055ad1-84ac-4722-8f5f-b023e919c762/bin/uautomizer-verify-LYvppIcaGC/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0055ad1-84ac-4722-8f5f-b023e919c762/bin/uautomizer-verify-LYvppIcaGC/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0055ad1-84ac-4722-8f5f-b023e919c762/bin/uautomizer-verify-LYvppIcaGC/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-array-int-trans.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0055ad1-84ac-4722-8f5f-b023e919c762/bin/uautomizer-verify-LYvppIcaGC/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0055ad1-84ac-4722-8f5f-b023e919c762/bin/uautomizer-verify-LYvppIcaGC --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 5bb11505151393f96d52a572beff0352326876d897656a8082ae272a8f39e0b4 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-6497de0 [2024-11-23 23:29:31,677 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-23 23:29:31,777 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0055ad1-84ac-4722-8f5f-b023e919c762/bin/uautomizer-verify-LYvppIcaGC/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-23 23:29:31,788 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-23 23:29:31,788 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-23 23:29:31,825 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-23 23:29:31,826 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-23 23:29:31,826 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-23 23:29:31,826 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-23 23:29:31,827 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-23 23:29:31,828 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-23 23:29:31,828 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-23 23:29:31,828 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-23 23:29:31,828 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-23 23:29:31,829 INFO L153 SettingsManager]: * Use SBE=true [2024-11-23 23:29:31,829 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-23 23:29:31,829 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-23 23:29:31,829 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-23 23:29:31,829 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-23 23:29:31,829 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-23 23:29:31,829 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-23 23:29:31,829 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-23 23:29:31,829 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-23 23:29:31,830 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-23 23:29:31,830 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-23 23:29:31,830 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-23 23:29:31,830 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-23 23:29:31,830 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-23 23:29:31,830 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-23 23:29:31,831 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-23 23:29:31,831 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-23 23:29:31,831 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-23 23:29:31,831 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-23 23:29:31,831 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 23:29:31,832 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-23 23:29:31,832 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-23 23:29:31,832 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-23 23:29:31,832 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-23 23:29:31,832 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 23:29:31,832 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-23 23:29:31,832 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-23 23:29:31,832 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-23 23:29:31,832 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-23 23:29:31,832 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-23 23:29:31,833 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-23 23:29:31,833 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-23 23:29:31,833 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-23 23:29:31,833 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0055ad1-84ac-4722-8f5f-b023e919c762/bin/uautomizer-verify-LYvppIcaGC 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 -> 5bb11505151393f96d52a572beff0352326876d897656a8082ae272a8f39e0b4 [2024-11-23 23:29:32,204 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-23 23:29:32,220 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-23 23:29:32,223 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-23 23:29:32,224 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-23 23:29:32,226 INFO L274 PluginConnector]: CDTParser initialized [2024-11-23 23:29:32,228 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0055ad1-84ac-4722-8f5f-b023e919c762/bin/uautomizer-verify-LYvppIcaGC/../../sv-benchmarks/c/weaver/chl-array-int-trans.wvr.c [2024-11-23 23:29:35,118 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0055ad1-84ac-4722-8f5f-b023e919c762/bin/uautomizer-verify-LYvppIcaGC/data/c1bd581f5/0de2ec507e5447c69acc6f4b1e2d21d5/FLAG891aa5a80 [2024-11-23 23:29:35,473 INFO L384 CDTParser]: Found 1 translation units. [2024-11-23 23:29:35,478 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0055ad1-84ac-4722-8f5f-b023e919c762/sv-benchmarks/c/weaver/chl-array-int-trans.wvr.c [2024-11-23 23:29:35,498 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0055ad1-84ac-4722-8f5f-b023e919c762/bin/uautomizer-verify-LYvppIcaGC/data/c1bd581f5/0de2ec507e5447c69acc6f4b1e2d21d5/FLAG891aa5a80 [2024-11-23 23:29:35,543 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0055ad1-84ac-4722-8f5f-b023e919c762/bin/uautomizer-verify-LYvppIcaGC/data/c1bd581f5/0de2ec507e5447c69acc6f4b1e2d21d5 [2024-11-23 23:29:35,545 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-23 23:29:35,547 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-23 23:29:35,549 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-23 23:29:35,549 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-23 23:29:35,555 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-23 23:29:35,556 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:29:35" (1/1) ... [2024-11-23 23:29:35,559 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21491120 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:29:35, skipping insertion in model container [2024-11-23 23:29:35,559 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:29:35" (1/1) ... [2024-11-23 23:29:35,581 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-23 23:29:35,809 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-23 23:29:35,816 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-23 23:29:35,835 INFO L200 MainTranslator]: Completed pre-run [2024-11-23 23:29:35,878 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-23 23:29:35,900 INFO L204 MainTranslator]: Completed translation [2024-11-23 23:29:35,901 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:29:35 WrapperNode [2024-11-23 23:29:35,901 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-23 23:29:35,902 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-23 23:29:35,902 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-23 23:29:35,902 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-23 23:29:35,911 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:29:35" (1/1) ... [2024-11-23 23:29:35,922 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:29:35" (1/1) ... [2024-11-23 23:29:35,964 INFO L138 Inliner]: procedures = 25, calls = 35, calls flagged for inlining = 14, calls inlined = 22, statements flattened = 266 [2024-11-23 23:29:35,964 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-23 23:29:35,965 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-23 23:29:35,965 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-23 23:29:35,965 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-23 23:29:35,976 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:29:35" (1/1) ... [2024-11-23 23:29:35,976 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:29:35" (1/1) ... [2024-11-23 23:29:35,980 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:29:35" (1/1) ... [2024-11-23 23:29:36,015 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 3 writes are split as follows [0, 3]. [2024-11-23 23:29:36,015 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:29:35" (1/1) ... [2024-11-23 23:29:36,015 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:29:35" (1/1) ... [2024-11-23 23:29:36,028 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:29:35" (1/1) ... [2024-11-23 23:29:36,029 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:29:35" (1/1) ... [2024-11-23 23:29:36,033 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:29:35" (1/1) ... [2024-11-23 23:29:36,035 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:29:35" (1/1) ... [2024-11-23 23:29:36,036 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:29:35" (1/1) ... [2024-11-23 23:29:36,039 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-23 23:29:36,040 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-23 23:29:36,040 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-23 23:29:36,040 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-23 23:29:36,041 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:29:35" (1/1) ... [2024-11-23 23:29:36,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 23:29:36,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0055ad1-84ac-4722-8f5f-b023e919c762/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:29:36,078 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0055ad1-84ac-4722-8f5f-b023e919c762/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-23 23:29:36,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0055ad1-84ac-4722-8f5f-b023e919c762/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-23 23:29:36,105 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-23 23:29:36,105 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-23 23:29:36,105 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-23 23:29:36,105 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-23 23:29:36,106 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-23 23:29:36,106 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-23 23:29:36,106 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-23 23:29:36,106 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-23 23:29:36,106 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-23 23:29:36,106 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-23 23:29:36,106 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-23 23:29:36,106 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-23 23:29:36,106 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-23 23:29:36,106 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-23 23:29:36,106 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-23 23:29:36,107 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-23 23:29:36,108 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-23 23:29:36,264 INFO L234 CfgBuilder]: Building ICFG [2024-11-23 23:29:36,266 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-23 23:29:36,980 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-23 23:29:36,981 INFO L283 CfgBuilder]: Performing block encoding [2024-11-23 23:29:37,496 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-23 23:29:37,496 INFO L312 CfgBuilder]: Removed 6 assume(true) statements. [2024-11-23 23:29:37,496 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:29:37 BoogieIcfgContainer [2024-11-23 23:29:37,496 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-23 23:29:37,502 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-23 23:29:37,502 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-23 23:29:37,508 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-23 23:29:37,508 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 11:29:35" (1/3) ... [2024-11-23 23:29:37,509 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ec3706f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:29:37, skipping insertion in model container [2024-11-23 23:29:37,509 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:29:35" (2/3) ... [2024-11-23 23:29:37,509 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ec3706f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:29:37, skipping insertion in model container [2024-11-23 23:29:37,509 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:29:37" (3/3) ... [2024-11-23 23:29:37,511 INFO L128 eAbstractionObserver]: Analyzing ICFG chl-array-int-trans.wvr.c [2024-11-23 23:29:37,525 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-23 23:29:37,526 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG chl-array-int-trans.wvr.c that has 4 procedures, 79 locations, 1 initial locations, 6 loop locations, and 32 error locations. [2024-11-23 23:29:37,526 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-23 23:29:37,620 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-23 23:29:37,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 88 places, 87 transitions, 195 flow [2024-11-23 23:29:37,720 INFO L124 PetriNetUnfolderBase]: 9/84 cut-off events. [2024-11-23 23:29:37,726 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-23 23:29:37,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97 conditions, 84 events. 9/84 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 275 event pairs, 0 based on Foata normal form. 0/43 useless extension candidates. Maximal degree in co-relation 63. Up to 2 conditions per place. [2024-11-23 23:29:37,731 INFO L82 GeneralOperation]: Start removeDead. Operand has 88 places, 87 transitions, 195 flow [2024-11-23 23:29:37,735 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 84 places, 83 transitions, 184 flow [2024-11-23 23:29:37,742 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-23 23:29:37,760 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;@361d3750, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-23 23:29:37,760 INFO L334 AbstractCegarLoop]: Starting to check reachability of 59 error locations. [2024-11-23 23:29:37,765 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-23 23:29:37,765 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-23 23:29:37,765 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-23 23:29:37,765 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:29:37,766 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-23 23:29:37,766 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-23 23:29:37,775 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:29:37,775 INFO L85 PathProgramCache]: Analyzing trace with hash 870673, now seen corresponding path program 1 times [2024-11-23 23:29:37,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:29:37,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197349261] [2024-11-23 23:29:37,784 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:29:37,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:29:37,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:29:38,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:29:38,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:29:38,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197349261] [2024-11-23 23:29:38,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197349261] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:29:38,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:29:38,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-23 23:29:38,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241857095] [2024-11-23 23:29:38,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:29:38,096 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-23 23:29:38,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:29:38,127 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-23 23:29:38,127 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-23 23:29:38,234 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 87 [2024-11-23 23:29:38,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 83 transitions, 184 flow. Second operand has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:29:38,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:29:38,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 87 [2024-11-23 23:29:38,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:29:38,702 INFO L124 PetriNetUnfolderBase]: 977/1702 cut-off events. [2024-11-23 23:29:38,703 INFO L125 PetriNetUnfolderBase]: For 63/63 co-relation queries the response was YES. [2024-11-23 23:29:38,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3126 conditions, 1702 events. 977/1702 cut-off events. For 63/63 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 9516 event pairs, 608 based on Foata normal form. 1/1214 useless extension candidates. Maximal degree in co-relation 2866. Up to 1318 conditions per place. [2024-11-23 23:29:38,735 INFO L140 encePairwiseOnDemand]: 81/87 looper letters, 36 selfloop transitions, 2 changer transitions 0/78 dead transitions. [2024-11-23 23:29:38,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 78 transitions, 250 flow [2024-11-23 23:29:38,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-23 23:29:38,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-23 23:29:38,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 174 transitions. [2024-11-23 23:29:38,752 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-11-23 23:29:38,754 INFO L175 Difference]: Start difference. First operand has 84 places, 83 transitions, 184 flow. Second operand 3 states and 174 transitions. [2024-11-23 23:29:38,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 78 transitions, 250 flow [2024-11-23 23:29:38,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 78 transitions, 238 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-23 23:29:38,774 INFO L231 Difference]: Finished difference. Result has 75 places, 78 transitions, 166 flow [2024-11-23 23:29:38,777 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=166, PETRI_PLACES=75, PETRI_TRANSITIONS=78} [2024-11-23 23:29:38,781 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, -9 predicate places. [2024-11-23 23:29:38,784 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 78 transitions, 166 flow [2024-11-23 23:29:38,784 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:29:38,784 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:29:38,784 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-23 23:29:38,785 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-23 23:29:38,785 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-23 23:29:38,785 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:29:38,785 INFO L85 PathProgramCache]: Analyzing trace with hash 870674, now seen corresponding path program 1 times [2024-11-23 23:29:38,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:29:38,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80788424] [2024-11-23 23:29:38,785 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:29:38,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:29:38,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:29:39,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:29:39,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:29:39,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80788424] [2024-11-23 23:29:39,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80788424] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:29:39,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:29:39,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-23 23:29:39,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532968053] [2024-11-23 23:29:39,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:29:39,180 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 23:29:39,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:29:39,181 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 23:29:39,181 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-23 23:29:39,282 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 87 [2024-11-23 23:29:39,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 78 transitions, 166 flow. Second operand has 4 states, 4 states have (on average 44.75) internal successors, (179), 4 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:29:39,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:29:39,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 87 [2024-11-23 23:29:39,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:29:39,801 INFO L124 PetriNetUnfolderBase]: 978/1705 cut-off events. [2024-11-23 23:29:39,802 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2024-11-23 23:29:39,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3073 conditions, 1705 events. 978/1705 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 9546 event pairs, 608 based on Foata normal form. 0/1213 useless extension candidates. Maximal degree in co-relation 3036. Up to 1331 conditions per place. [2024-11-23 23:29:39,819 INFO L140 encePairwiseOnDemand]: 82/87 looper letters, 40 selfloop transitions, 4 changer transitions 0/81 dead transitions. [2024-11-23 23:29:39,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 81 transitions, 260 flow [2024-11-23 23:29:39,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-23 23:29:39,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-23 23:29:39,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 221 transitions. [2024-11-23 23:29:39,822 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6350574712643678 [2024-11-23 23:29:39,822 INFO L175 Difference]: Start difference. First operand has 75 places, 78 transitions, 166 flow. Second operand 4 states and 221 transitions. [2024-11-23 23:29:39,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 81 transitions, 260 flow [2024-11-23 23:29:39,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 81 transitions, 256 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-23 23:29:39,828 INFO L231 Difference]: Finished difference. Result has 78 places, 81 transitions, 189 flow [2024-11-23 23:29:39,828 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=189, PETRI_PLACES=78, PETRI_TRANSITIONS=81} [2024-11-23 23:29:39,829 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, -6 predicate places. [2024-11-23 23:29:39,830 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 81 transitions, 189 flow [2024-11-23 23:29:39,830 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 44.75) internal successors, (179), 4 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:29:39,830 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:29:39,830 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-23 23:29:39,830 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-23 23:29:39,831 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-23 23:29:39,833 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:29:39,833 INFO L85 PathProgramCache]: Analyzing trace with hash 26991385, now seen corresponding path program 1 times [2024-11-23 23:29:39,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:29:39,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481506160] [2024-11-23 23:29:39,834 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:29:39,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:29:39,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:29:40,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:29:40,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:29:40,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481506160] [2024-11-23 23:29:40,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481506160] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:29:40,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:29:40,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-23 23:29:40,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788572826] [2024-11-23 23:29:40,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:29:40,232 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-23 23:29:40,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:29:40,233 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-23 23:29:40,233 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-23 23:29:40,432 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 87 [2024-11-23 23:29:40,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 81 transitions, 189 flow. Second operand has 5 states, 5 states have (on average 44.8) internal successors, (224), 5 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:29:40,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:29:40,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 87 [2024-11-23 23:29:40,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:29:40,868 INFO L124 PetriNetUnfolderBase]: 979/1708 cut-off events. [2024-11-23 23:29:40,868 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2024-11-23 23:29:40,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3090 conditions, 1708 events. 979/1708 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 9526 event pairs, 608 based on Foata normal form. 0/1215 useless extension candidates. Maximal degree in co-relation 3065. Up to 1330 conditions per place. [2024-11-23 23:29:40,883 INFO L140 encePairwiseOnDemand]: 79/87 looper letters, 40 selfloop transitions, 7 changer transitions 0/84 dead transitions. [2024-11-23 23:29:40,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 84 transitions, 289 flow [2024-11-23 23:29:40,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-23 23:29:40,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-23 23:29:40,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 268 transitions. [2024-11-23 23:29:40,886 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6160919540229886 [2024-11-23 23:29:40,886 INFO L175 Difference]: Start difference. First operand has 78 places, 81 transitions, 189 flow. Second operand 5 states and 268 transitions. [2024-11-23 23:29:40,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 84 transitions, 289 flow [2024-11-23 23:29:40,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 84 transitions, 286 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-23 23:29:40,889 INFO L231 Difference]: Finished difference. Result has 83 places, 84 transitions, 223 flow [2024-11-23 23:29:40,889 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=223, PETRI_PLACES=83, PETRI_TRANSITIONS=84} [2024-11-23 23:29:40,890 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, -1 predicate places. [2024-11-23 23:29:40,890 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 84 transitions, 223 flow [2024-11-23 23:29:40,890 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 44.8) internal successors, (224), 5 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:29:40,890 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:29:40,890 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-23 23:29:40,890 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-23 23:29:40,891 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-23 23:29:40,891 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:29:40,891 INFO L85 PathProgramCache]: Analyzing trace with hash 836745591, now seen corresponding path program 1 times [2024-11-23 23:29:40,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:29:40,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707946466] [2024-11-23 23:29:40,891 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:29:40,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:29:40,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:29:41,296 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:29:41,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:29:41,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707946466] [2024-11-23 23:29:41,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707946466] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:29:41,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734869927] [2024-11-23 23:29:41,296 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:29:41,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:29:41,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0055ad1-84ac-4722-8f5f-b023e919c762/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:29:41,302 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0055ad1-84ac-4722-8f5f-b023e919c762/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:29:41,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0055ad1-84ac-4722-8f5f-b023e919c762/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-23 23:29:41,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:29:41,402 INFO L256 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-23 23:29:41,407 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:29:41,500 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 [2024-11-23 23:29:41,829 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:29:41,829 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:29:41,979 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:29:41,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734869927] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:29:41,979 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:29:41,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-23 23:29:41,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338521633] [2024-11-23 23:29:41,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:29:41,980 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-23 23:29:41,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:29:41,981 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-23 23:29:41,981 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-11-23 23:29:42,817 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 87 [2024-11-23 23:29:42,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 84 transitions, 223 flow. Second operand has 11 states, 11 states have (on average 45.36363636363637) internal successors, (499), 11 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:29:42,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:29:42,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 87 [2024-11-23 23:29:42,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:29:43,339 INFO L124 PetriNetUnfolderBase]: 979/1707 cut-off events. [2024-11-23 23:29:43,339 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2024-11-23 23:29:43,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3103 conditions, 1707 events. 979/1707 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 9530 event pairs, 608 based on Foata normal form. 0/1217 useless extension candidates. Maximal degree in co-relation 3075. Up to 1330 conditions per place. [2024-11-23 23:29:43,355 INFO L140 encePairwiseOnDemand]: 82/87 looper letters, 39 selfloop transitions, 7 changer transitions 0/83 dead transitions. [2024-11-23 23:29:43,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 83 transitions, 311 flow [2024-11-23 23:29:43,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-23 23:29:43,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-23 23:29:43,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 308 transitions. [2024-11-23 23:29:43,359 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5900383141762452 [2024-11-23 23:29:43,359 INFO L175 Difference]: Start difference. First operand has 83 places, 84 transitions, 223 flow. Second operand 6 states and 308 transitions. [2024-11-23 23:29:43,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 83 transitions, 311 flow [2024-11-23 23:29:43,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 83 transitions, 310 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-23 23:29:43,364 INFO L231 Difference]: Finished difference. Result has 86 places, 83 transitions, 232 flow [2024-11-23 23:29:43,364 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=232, PETRI_PLACES=86, PETRI_TRANSITIONS=83} [2024-11-23 23:29:43,366 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 2 predicate places. [2024-11-23 23:29:43,366 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 83 transitions, 232 flow [2024-11-23 23:29:43,366 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 45.36363636363637) internal successors, (499), 11 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:29:43,367 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:29:43,367 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-11-23 23:29:43,377 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0055ad1-84ac-4722-8f5f-b023e919c762/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-23 23:29:43,572 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0055ad1-84ac-4722-8f5f-b023e919c762/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:29:43,572 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-23 23:29:43,573 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:29:43,573 INFO L85 PathProgramCache]: Analyzing trace with hash 836735387, now seen corresponding path program 1 times [2024-11-23 23:29:43,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:29:43,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260926539] [2024-11-23 23:29:43,573 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:29:43,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:29:43,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:29:43,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:29:43,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:29:43,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260926539] [2024-11-23 23:29:43,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260926539] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:29:43,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:29:43,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-23 23:29:43,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680872830] [2024-11-23 23:29:43,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:29:43,842 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-23 23:29:43,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:29:43,843 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-23 23:29:43,843 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-23 23:29:44,019 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 87 [2024-11-23 23:29:44,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 83 transitions, 232 flow. Second operand has 5 states, 5 states have (on average 45.0) internal successors, (225), 5 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:29:44,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:29:44,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 87 [2024-11-23 23:29:44,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:29:44,357 INFO L124 PetriNetUnfolderBase]: 980/1710 cut-off events. [2024-11-23 23:29:44,357 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2024-11-23 23:29:44,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3116 conditions, 1710 events. 980/1710 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 9520 event pairs, 608 based on Foata normal form. 0/1219 useless extension candidates. Maximal degree in co-relation 3083. Up to 1332 conditions per place. [2024-11-23 23:29:44,372 INFO L140 encePairwiseOnDemand]: 78/87 looper letters, 40 selfloop transitions, 9 changer transitions 0/86 dead transitions. [2024-11-23 23:29:44,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 86 transitions, 336 flow [2024-11-23 23:29:44,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-23 23:29:44,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-23 23:29:44,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 267 transitions. [2024-11-23 23:29:44,377 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6137931034482759 [2024-11-23 23:29:44,377 INFO L175 Difference]: Start difference. First operand has 86 places, 83 transitions, 232 flow. Second operand 5 states and 267 transitions. [2024-11-23 23:29:44,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 86 transitions, 336 flow [2024-11-23 23:29:44,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 86 transitions, 302 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-11-23 23:29:44,382 INFO L231 Difference]: Finished difference. Result has 84 places, 86 transitions, 241 flow [2024-11-23 23:29:44,382 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=241, PETRI_PLACES=84, PETRI_TRANSITIONS=86} [2024-11-23 23:29:44,383 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 0 predicate places. [2024-11-23 23:29:44,383 INFO L471 AbstractCegarLoop]: Abstraction has has 84 places, 86 transitions, 241 flow [2024-11-23 23:29:44,383 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 45.0) internal successors, (225), 5 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:29:44,384 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:29:44,384 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-11-23 23:29:44,384 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-23 23:29:44,384 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-23 23:29:44,385 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:29:44,385 INFO L85 PathProgramCache]: Analyzing trace with hash 168943895, now seen corresponding path program 1 times [2024-11-23 23:29:44,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:29:44,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744811200] [2024-11-23 23:29:44,386 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:29:44,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:29:44,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:29:44,647 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:29:44,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:29:44,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744811200] [2024-11-23 23:29:44,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744811200] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:29:44,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261787941] [2024-11-23 23:29:44,647 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:29:44,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:29:44,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0055ad1-84ac-4722-8f5f-b023e919c762/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:29:44,650 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0055ad1-84ac-4722-8f5f-b023e919c762/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:29:44,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0055ad1-84ac-4722-8f5f-b023e919c762/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-23 23:29:44,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:29:44,735 INFO L256 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-23 23:29:44,736 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:29:44,756 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 [2024-11-23 23:29:44,993 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:29:44,997 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:29:45,179 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:29:45,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261787941] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:29:45,180 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:29:45,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-23 23:29:45,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257021313] [2024-11-23 23:29:45,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:29:45,180 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-23 23:29:45,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:29:45,181 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-23 23:29:45,181 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-11-23 23:29:46,098 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 87 [2024-11-23 23:29:46,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 86 transitions, 241 flow. Second operand has 13 states, 13 states have (on average 45.30769230769231) internal successors, (589), 13 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:29:46,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:29:46,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 87 [2024-11-23 23:29:46,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:29:46,678 INFO L124 PetriNetUnfolderBase]: 982/1715 cut-off events. [2024-11-23 23:29:46,678 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2024-11-23 23:29:46,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3131 conditions, 1715 events. 982/1715 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 9544 event pairs, 608 based on Foata normal form. 0/1227 useless extension candidates. Maximal degree in co-relation 3079. Up to 1326 conditions per place. [2024-11-23 23:29:46,692 INFO L140 encePairwiseOnDemand]: 79/87 looper letters, 36 selfloop transitions, 18 changer transitions 0/91 dead transitions. [2024-11-23 23:29:46,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 91 transitions, 368 flow [2024-11-23 23:29:46,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-23 23:29:46,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-23 23:29:46,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 449 transitions. [2024-11-23 23:29:46,695 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5734355044699873 [2024-11-23 23:29:46,695 INFO L175 Difference]: Start difference. First operand has 84 places, 86 transitions, 241 flow. Second operand 9 states and 449 transitions. [2024-11-23 23:29:46,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 91 transitions, 368 flow [2024-11-23 23:29:46,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 91 transitions, 360 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-23 23:29:46,698 INFO L231 Difference]: Finished difference. Result has 89 places, 91 transitions, 288 flow [2024-11-23 23:29:46,698 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=288, PETRI_PLACES=89, PETRI_TRANSITIONS=91} [2024-11-23 23:29:46,699 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 5 predicate places. [2024-11-23 23:29:46,699 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 91 transitions, 288 flow [2024-11-23 23:29:46,699 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 45.30769230769231) internal successors, (589), 13 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:29:46,699 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:29:46,699 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-11-23 23:29:46,709 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0055ad1-84ac-4722-8f5f-b023e919c762/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-23 23:29:46,904 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0055ad1-84ac-4722-8f5f-b023e919c762/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-23 23:29:46,904 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-23 23:29:46,905 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:29:46,905 INFO L85 PathProgramCache]: Analyzing trace with hash 943849838, now seen corresponding path program 1 times [2024-11-23 23:29:46,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:29:46,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533400615] [2024-11-23 23:29:46,905 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:29:46,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:29:46,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:29:47,163 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:29:47,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:29:47,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533400615] [2024-11-23 23:29:47,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533400615] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:29:47,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638141607] [2024-11-23 23:29:47,164 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:29:47,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:29:47,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0055ad1-84ac-4722-8f5f-b023e919c762/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:29:47,166 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0055ad1-84ac-4722-8f5f-b023e919c762/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:29:47,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0055ad1-84ac-4722-8f5f-b023e919c762/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-23 23:29:47,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:29:47,249 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-23 23:29:47,251 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:29:47,273 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 [2024-11-23 23:29:47,478 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:29:47,478 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:29:47,714 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:29:47,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638141607] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:29:47,715 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:29:47,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-23 23:29:47,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268459609] [2024-11-23 23:29:47,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:29:47,715 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-23 23:29:47,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:29:47,716 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-23 23:29:47,716 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-11-23 23:29:48,652 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 87 [2024-11-23 23:29:48,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 91 transitions, 288 flow. Second operand has 13 states, 13 states have (on average 45.46153846153846) internal successors, (591), 13 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:29:48,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:29:48,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 87 [2024-11-23 23:29:48,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:29:49,249 INFO L124 PetriNetUnfolderBase]: 982/1714 cut-off events. [2024-11-23 23:29:49,249 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2024-11-23 23:29:49,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3142 conditions, 1714 events. 982/1714 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 9549 event pairs, 608 based on Foata normal form. 0/1227 useless extension candidates. Maximal degree in co-relation 3087. Up to 1327 conditions per place. [2024-11-23 23:29:49,261 INFO L140 encePairwiseOnDemand]: 78/87 looper letters, 34 selfloop transitions, 19 changer transitions 0/90 dead transitions. [2024-11-23 23:29:49,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 90 transitions, 390 flow [2024-11-23 23:29:49,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-23 23:29:49,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-23 23:29:49,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 353 transitions. [2024-11-23 23:29:49,263 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5796387520525451 [2024-11-23 23:29:49,263 INFO L175 Difference]: Start difference. First operand has 89 places, 91 transitions, 288 flow. Second operand 7 states and 353 transitions. [2024-11-23 23:29:49,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 90 transitions, 390 flow [2024-11-23 23:29:49,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 90 transitions, 357 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-11-23 23:29:49,266 INFO L231 Difference]: Finished difference. Result has 89 places, 90 transitions, 289 flow [2024-11-23 23:29:49,267 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=251, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=289, PETRI_PLACES=89, PETRI_TRANSITIONS=90} [2024-11-23 23:29:49,267 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 5 predicate places. [2024-11-23 23:29:49,267 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 90 transitions, 289 flow [2024-11-23 23:29:49,268 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 45.46153846153846) internal successors, (591), 13 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:29:49,268 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:29:49,268 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:29:49,277 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0055ad1-84ac-4722-8f5f-b023e919c762/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-23 23:29:49,472 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0055ad1-84ac-4722-8f5f-b023e919c762/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-23 23:29:49,473 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-23 23:29:49,473 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:29:49,473 INFO L85 PathProgramCache]: Analyzing trace with hash -802325547, now seen corresponding path program 1 times [2024-11-23 23:29:49,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:29:49,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424864765] [2024-11-23 23:29:49,474 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:29:49,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:29:49,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:29:49,562 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:29:49,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:29:49,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424864765] [2024-11-23 23:29:49,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424864765] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:29:49,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:29:49,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-23 23:29:49,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958334849] [2024-11-23 23:29:49,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:29:49,563 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-23 23:29:49,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:29:49,564 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-23 23:29:49,564 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-23 23:29:49,595 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 87 [2024-11-23 23:29:49,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 90 transitions, 289 flow. Second operand has 5 states, 5 states have (on average 47.4) internal successors, (237), 5 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:29:49,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:29:49,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 87 [2024-11-23 23:29:49,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:29:50,027 INFO L124 PetriNetUnfolderBase]: 1836/3076 cut-off events. [2024-11-23 23:29:50,027 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2024-11-23 23:29:50,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5771 conditions, 3076 events. 1836/3076 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 18238 event pairs, 797 based on Foata normal form. 0/2271 useless extension candidates. Maximal degree in co-relation 3647. Up to 1570 conditions per place. [2024-11-23 23:29:50,047 INFO L140 encePairwiseOnDemand]: 78/87 looper letters, 102 selfloop transitions, 9 changer transitions 0/147 dead transitions. [2024-11-23 23:29:50,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 147 transitions, 689 flow [2024-11-23 23:29:50,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-23 23:29:50,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-23 23:29:50,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 373 transitions. [2024-11-23 23:29:50,049 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7145593869731801 [2024-11-23 23:29:50,049 INFO L175 Difference]: Start difference. First operand has 89 places, 90 transitions, 289 flow. Second operand 6 states and 373 transitions. [2024-11-23 23:29:50,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 147 transitions, 689 flow [2024-11-23 23:29:50,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 147 transitions, 625 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-11-23 23:29:50,052 INFO L231 Difference]: Finished difference. Result has 91 places, 96 transitions, 318 flow [2024-11-23 23:29:50,053 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=318, PETRI_PLACES=91, PETRI_TRANSITIONS=96} [2024-11-23 23:29:50,054 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 7 predicate places. [2024-11-23 23:29:50,054 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 96 transitions, 318 flow [2024-11-23 23:29:50,056 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 47.4) internal successors, (237), 5 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:29:50,056 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:29:50,056 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:29:50,056 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-23 23:29:50,057 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-23 23:29:50,057 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:29:50,057 INFO L85 PathProgramCache]: Analyzing trace with hash 1997190732, now seen corresponding path program 1 times [2024-11-23 23:29:50,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:29:50,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719545083] [2024-11-23 23:29:50,057 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:29:50,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:29:50,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:29:50,169 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 23:29:50,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:29:50,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719545083] [2024-11-23 23:29:50,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719545083] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:29:50,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:29:50,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-23 23:29:50,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246723626] [2024-11-23 23:29:50,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:29:50,170 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-23 23:29:50,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:29:50,171 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-23 23:29:50,171 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-23 23:29:50,216 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 87 [2024-11-23 23:29:50,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 96 transitions, 318 flow. Second operand has 5 states, 5 states have (on average 47.8) internal successors, (239), 5 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:29:50,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:29:50,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 87 [2024-11-23 23:29:50,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:29:50,839 INFO L124 PetriNetUnfolderBase]: 3088/5520 cut-off events. [2024-11-23 23:29:50,839 INFO L125 PetriNetUnfolderBase]: For 555/555 co-relation queries the response was YES. [2024-11-23 23:29:50,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10466 conditions, 5520 events. 3088/5520 cut-off events. For 555/555 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 38959 event pairs, 1505 based on Foata normal form. 0/4017 useless extension candidates. Maximal degree in co-relation 5956. Up to 2730 conditions per place. [2024-11-23 23:29:50,875 INFO L140 encePairwiseOnDemand]: 80/87 looper letters, 100 selfloop transitions, 11 changer transitions 0/147 dead transitions. [2024-11-23 23:29:50,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 147 transitions, 687 flow [2024-11-23 23:29:50,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-23 23:29:50,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-23 23:29:50,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 366 transitions. [2024-11-23 23:29:50,877 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7011494252873564 [2024-11-23 23:29:50,877 INFO L175 Difference]: Start difference. First operand has 91 places, 96 transitions, 318 flow. Second operand 6 states and 366 transitions. [2024-11-23 23:29:50,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 147 transitions, 687 flow [2024-11-23 23:29:50,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 147 transitions, 682 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-23 23:29:50,884 INFO L231 Difference]: Finished difference. Result has 97 places, 101 transitions, 386 flow [2024-11-23 23:29:50,886 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=313, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=386, PETRI_PLACES=97, PETRI_TRANSITIONS=101} [2024-11-23 23:29:50,887 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 13 predicate places. [2024-11-23 23:29:50,887 INFO L471 AbstractCegarLoop]: Abstraction has has 97 places, 101 transitions, 386 flow [2024-11-23 23:29:50,888 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 47.8) internal successors, (239), 5 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:29:50,888 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:29:50,888 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:29:50,889 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-23 23:29:50,889 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-23 23:29:50,889 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:29:50,889 INFO L85 PathProgramCache]: Analyzing trace with hash -1128627568, now seen corresponding path program 1 times [2024-11-23 23:29:50,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:29:50,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717703434] [2024-11-23 23:29:50,889 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:29:50,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:29:50,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:29:50,989 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 23:29:50,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:29:50,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717703434] [2024-11-23 23:29:50,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717703434] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:29:50,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:29:50,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-23 23:29:50,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653962274] [2024-11-23 23:29:50,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:29:50,990 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-23 23:29:50,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:29:50,990 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-23 23:29:50,991 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-23 23:29:51,022 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 87 [2024-11-23 23:29:51,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 101 transitions, 386 flow. Second operand has 5 states, 5 states have (on average 47.8) internal successors, (239), 5 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:29:51,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:29:51,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 87 [2024-11-23 23:29:51,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:29:51,607 INFO L124 PetriNetUnfolderBase]: 2742/4882 cut-off events. [2024-11-23 23:29:51,607 INFO L125 PetriNetUnfolderBase]: For 994/994 co-relation queries the response was YES. [2024-11-23 23:29:51,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9758 conditions, 4882 events. 2742/4882 cut-off events. For 994/994 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 33432 event pairs, 1356 based on Foata normal form. 50/3747 useless extension candidates. Maximal degree in co-relation 5359. Up to 2542 conditions per place. [2024-11-23 23:29:51,639 INFO L140 encePairwiseOnDemand]: 80/87 looper letters, 93 selfloop transitions, 12 changer transitions 0/141 dead transitions. [2024-11-23 23:29:51,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 141 transitions, 701 flow [2024-11-23 23:29:51,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-23 23:29:51,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-23 23:29:51,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 361 transitions. [2024-11-23 23:29:51,641 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6915708812260536 [2024-11-23 23:29:51,642 INFO L175 Difference]: Start difference. First operand has 97 places, 101 transitions, 386 flow. Second operand 6 states and 361 transitions. [2024-11-23 23:29:51,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 141 transitions, 701 flow [2024-11-23 23:29:51,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 141 transitions, 696 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-23 23:29:51,647 INFO L231 Difference]: Finished difference. Result has 103 places, 103 transitions, 429 flow [2024-11-23 23:29:51,648 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=381, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=429, PETRI_PLACES=103, PETRI_TRANSITIONS=103} [2024-11-23 23:29:51,649 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 19 predicate places. [2024-11-23 23:29:51,649 INFO L471 AbstractCegarLoop]: Abstraction has has 103 places, 103 transitions, 429 flow [2024-11-23 23:29:51,649 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 47.8) internal successors, (239), 5 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:29:51,650 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:29:51,650 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:29:51,650 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-23 23:29:51,650 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-23 23:29:51,650 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:29:51,650 INFO L85 PathProgramCache]: Analyzing trace with hash -8743217, now seen corresponding path program 1 times [2024-11-23 23:29:51,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:29:51,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446014711] [2024-11-23 23:29:51,650 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:29:51,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:29:51,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:29:52,144 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 23:29:52,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:29:52,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446014711] [2024-11-23 23:29:52,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446014711] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:29:52,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470649919] [2024-11-23 23:29:52,144 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:29:52,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:29:52,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0055ad1-84ac-4722-8f5f-b023e919c762/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:29:52,147 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0055ad1-84ac-4722-8f5f-b023e919c762/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:29:52,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0055ad1-84ac-4722-8f5f-b023e919c762/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-23 23:29:52,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:29:52,239 INFO L256 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-23 23:29:52,241 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:29:52,247 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 [2024-11-23 23:29:52,329 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-23 23:29:52,329 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 [2024-11-23 23:29:52,334 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 16 treesize of output 11 [2024-11-23 23:29:52,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-23 23:29:52,366 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 16 treesize of output 11 [2024-11-23 23:29:52,377 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-23 23:29:52,378 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 [2024-11-23 23:29:52,402 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-23 23:29:52,402 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:29:52,650 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 100 treesize of output 96 [2024-11-23 23:29:52,878 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-23 23:29:52,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470649919] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:29:52,878 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:29:52,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 12 [2024-11-23 23:29:52,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407724350] [2024-11-23 23:29:52,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:29:52,879 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-23 23:29:52,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:29:52,879 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-23 23:29:52,879 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2024-11-23 23:29:57,198 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 87 [2024-11-23 23:29:57,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 103 transitions, 429 flow. Second operand has 14 states, 14 states have (on average 34.857142857142854) internal successors, (488), 14 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:29:57,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:29:57,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 87 [2024-11-23 23:29:57,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:29:59,111 INFO L124 PetriNetUnfolderBase]: 6392/11319 cut-off events. [2024-11-23 23:29:59,111 INFO L125 PetriNetUnfolderBase]: For 3084/3084 co-relation queries the response was YES. [2024-11-23 23:29:59,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22423 conditions, 11319 events. 6392/11319 cut-off events. For 3084/3084 co-relation queries the response was YES. Maximal size of possible extension queue 506. Compared 85313 event pairs, 2611 based on Foata normal form. 0/8912 useless extension candidates. Maximal degree in co-relation 13269. Up to 2792 conditions per place. [2024-11-23 23:29:59,224 INFO L140 encePairwiseOnDemand]: 71/87 looper letters, 140 selfloop transitions, 25 changer transitions 0/192 dead transitions. [2024-11-23 23:29:59,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 192 transitions, 992 flow [2024-11-23 23:29:59,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-23 23:29:59,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-23 23:29:59,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 457 transitions. [2024-11-23 23:29:59,228 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5836526181353767 [2024-11-23 23:29:59,228 INFO L175 Difference]: Start difference. First operand has 103 places, 103 transitions, 429 flow. Second operand 9 states and 457 transitions. [2024-11-23 23:29:59,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 192 transitions, 992 flow [2024-11-23 23:29:59,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 192 transitions, 974 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-23 23:29:59,238 INFO L231 Difference]: Finished difference. Result has 108 places, 103 transitions, 493 flow [2024-11-23 23:29:59,239 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=407, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=493, PETRI_PLACES=108, PETRI_TRANSITIONS=103} [2024-11-23 23:29:59,240 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 24 predicate places. [2024-11-23 23:29:59,240 INFO L471 AbstractCegarLoop]: Abstraction has has 108 places, 103 transitions, 493 flow [2024-11-23 23:29:59,241 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 34.857142857142854) internal successors, (488), 14 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:29:59,241 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:29:59,241 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:29:59,250 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0055ad1-84ac-4722-8f5f-b023e919c762/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-23 23:29:59,445 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0055ad1-84ac-4722-8f5f-b023e919c762/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-23 23:29:59,445 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-23 23:29:59,447 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:29:59,447 INFO L85 PathProgramCache]: Analyzing trace with hash -896023095, now seen corresponding path program 1 times [2024-11-23 23:29:59,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:29:59,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679698290] [2024-11-23 23:29:59,447 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:29:59,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:29:59,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:29:59,572 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-23 23:29:59,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:29:59,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679698290] [2024-11-23 23:29:59,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679698290] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:29:59,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:29:59,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-23 23:29:59,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629565917] [2024-11-23 23:29:59,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:29:59,575 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-23 23:29:59,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:29:59,576 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-23 23:29:59,576 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-23 23:29:59,622 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 87 [2024-11-23 23:29:59,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 103 transitions, 493 flow. Second operand has 5 states, 5 states have (on average 48.2) internal successors, (241), 5 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:29:59,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:29:59,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 87 [2024-11-23 23:29:59,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:30:00,691 INFO L124 PetriNetUnfolderBase]: 7020/12674 cut-off events. [2024-11-23 23:30:00,691 INFO L125 PetriNetUnfolderBase]: For 6787/6868 co-relation queries the response was YES. [2024-11-23 23:30:00,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26699 conditions, 12674 events. 7020/12674 cut-off events. For 6787/6868 co-relation queries the response was YES. Maximal size of possible extension queue 611. Compared 99231 event pairs, 3465 based on Foata normal form. 203/10148 useless extension candidates. Maximal degree in co-relation 22324. Up to 5965 conditions per place. [2024-11-23 23:30:00,769 INFO L140 encePairwiseOnDemand]: 82/87 looper letters, 104 selfloop transitions, 15 changer transitions 0/153 dead transitions. [2024-11-23 23:30:00,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 153 transitions, 925 flow [2024-11-23 23:30:00,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-23 23:30:00,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-23 23:30:00,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 314 transitions. [2024-11-23 23:30:00,771 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7218390804597701 [2024-11-23 23:30:00,771 INFO L175 Difference]: Start difference. First operand has 108 places, 103 transitions, 493 flow. Second operand 5 states and 314 transitions. [2024-11-23 23:30:00,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 153 transitions, 925 flow [2024-11-23 23:30:00,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 153 transitions, 865 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-11-23 23:30:00,782 INFO L231 Difference]: Finished difference. Result has 110 places, 105 transitions, 499 flow [2024-11-23 23:30:00,782 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=445, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=499, PETRI_PLACES=110, PETRI_TRANSITIONS=105} [2024-11-23 23:30:00,783 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 26 predicate places. [2024-11-23 23:30:00,783 INFO L471 AbstractCegarLoop]: Abstraction has has 110 places, 105 transitions, 499 flow [2024-11-23 23:30:00,783 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 48.2) internal successors, (241), 5 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:30:00,783 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:30:00,784 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:30:00,784 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-23 23:30:00,784 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-23 23:30:00,784 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:30:00,784 INFO L85 PathProgramCache]: Analyzing trace with hash -640342412, now seen corresponding path program 1 times [2024-11-23 23:30:00,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:30:00,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554483179] [2024-11-23 23:30:00,785 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:30:00,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:30:00,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:30:00,877 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:30:00,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:30:00,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554483179] [2024-11-23 23:30:00,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554483179] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:30:00,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:30:00,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-23 23:30:00,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802795377] [2024-11-23 23:30:00,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:30:00,878 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-23 23:30:00,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:30:00,878 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-23 23:30:00,878 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-23 23:30:00,913 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 87 [2024-11-23 23:30:00,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 105 transitions, 499 flow. Second operand has 5 states, 5 states have (on average 48.2) internal successors, (241), 5 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:30:00,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:30:00,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 87 [2024-11-23 23:30:00,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:30:02,051 INFO L124 PetriNetUnfolderBase]: 6588/13356 cut-off events. [2024-11-23 23:30:02,051 INFO L125 PetriNetUnfolderBase]: For 8195/8305 co-relation queries the response was YES. [2024-11-23 23:30:02,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27379 conditions, 13356 events. 6588/13356 cut-off events. For 8195/8305 co-relation queries the response was YES. Maximal size of possible extension queue 597. Compared 116206 event pairs, 4352 based on Foata normal form. 20/10134 useless extension candidates. Maximal degree in co-relation 22490. Up to 7378 conditions per place. [2024-11-23 23:30:02,112 INFO L140 encePairwiseOnDemand]: 78/87 looper letters, 109 selfloop transitions, 11 changer transitions 0/152 dead transitions. [2024-11-23 23:30:02,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 152 transitions, 913 flow [2024-11-23 23:30:02,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-23 23:30:02,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-23 23:30:02,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 365 transitions. [2024-11-23 23:30:02,114 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6992337164750958 [2024-11-23 23:30:02,114 INFO L175 Difference]: Start difference. First operand has 110 places, 105 transitions, 499 flow. Second operand 6 states and 365 transitions. [2024-11-23 23:30:02,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 152 transitions, 913 flow [2024-11-23 23:30:02,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 152 transitions, 901 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-23 23:30:02,125 INFO L231 Difference]: Finished difference. Result has 113 places, 104 transitions, 509 flow [2024-11-23 23:30:02,126 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=472, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=509, PETRI_PLACES=113, PETRI_TRANSITIONS=104} [2024-11-23 23:30:02,126 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 29 predicate places. [2024-11-23 23:30:02,126 INFO L471 AbstractCegarLoop]: Abstraction has has 113 places, 104 transitions, 509 flow [2024-11-23 23:30:02,127 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 48.2) internal successors, (241), 5 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:30:02,127 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:30:02,127 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:30:02,127 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-23 23:30:02,127 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-23 23:30:02,128 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:30:02,128 INFO L85 PathProgramCache]: Analyzing trace with hash -271038896, now seen corresponding path program 1 times [2024-11-23 23:30:02,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:30:02,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707446778] [2024-11-23 23:30:02,128 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:30:02,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:30:02,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:30:02,427 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 23:30:02,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:30:02,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707446778] [2024-11-23 23:30:02,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707446778] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:30:02,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893157437] [2024-11-23 23:30:02,429 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:30:02,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:30:02,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0055ad1-84ac-4722-8f5f-b023e919c762/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:30:02,432 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0055ad1-84ac-4722-8f5f-b023e919c762/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:30:02,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0055ad1-84ac-4722-8f5f-b023e919c762/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-23 23:30:02,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:30:02,524 INFO L256 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-23 23:30:02,526 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:30:02,534 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 [2024-11-23 23:30:02,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-23 23:30:02,591 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 16 treesize of output 11 [2024-11-23 23:30:02,600 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-23 23:30:02,600 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 [2024-11-23 23:30:02,662 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 23:30:02,662 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:30:02,778 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 52 treesize of output 48 [2024-11-23 23:30:02,851 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 23:30:02,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893157437] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:30:02,851 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:30:02,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-11-23 23:30:02,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296002818] [2024-11-23 23:30:02,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:30:02,852 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-23 23:30:02,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:30:02,853 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-23 23:30:02,853 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-11-23 23:30:04,159 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 87 [2024-11-23 23:30:04,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 104 transitions, 509 flow. Second operand has 13 states, 13 states have (on average 42.92307692307692) internal successors, (558), 13 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:30:04,161 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:30:04,161 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 87 [2024-11-23 23:30:04,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:30:05,756 INFO L124 PetriNetUnfolderBase]: 6720/11981 cut-off events. [2024-11-23 23:30:05,756 INFO L125 PetriNetUnfolderBase]: For 7868/7868 co-relation queries the response was YES. [2024-11-23 23:30:05,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26688 conditions, 11981 events. 6720/11981 cut-off events. For 7868/7868 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 90914 event pairs, 2542 based on Foata normal form. 0/10372 useless extension candidates. Maximal degree in co-relation 20698. Up to 3262 conditions per place. [2024-11-23 23:30:05,829 INFO L140 encePairwiseOnDemand]: 75/87 looper letters, 123 selfloop transitions, 27 changer transitions 0/180 dead transitions. [2024-11-23 23:30:05,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 180 transitions, 1023 flow [2024-11-23 23:30:05,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-23 23:30:05,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-23 23:30:05,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 498 transitions. [2024-11-23 23:30:05,831 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6360153256704981 [2024-11-23 23:30:05,832 INFO L175 Difference]: Start difference. First operand has 113 places, 104 transitions, 509 flow. Second operand 9 states and 498 transitions. [2024-11-23 23:30:05,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 180 transitions, 1023 flow [2024-11-23 23:30:05,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 180 transitions, 1010 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-23 23:30:05,850 INFO L231 Difference]: Finished difference. Result has 119 places, 106 transitions, 576 flow [2024-11-23 23:30:05,851 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=494, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=576, PETRI_PLACES=119, PETRI_TRANSITIONS=106} [2024-11-23 23:30:05,851 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 35 predicate places. [2024-11-23 23:30:05,851 INFO L471 AbstractCegarLoop]: Abstraction has has 119 places, 106 transitions, 576 flow [2024-11-23 23:30:05,852 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 42.92307692307692) internal successors, (558), 13 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:30:05,852 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:30:05,852 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:30:05,863 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0055ad1-84ac-4722-8f5f-b023e919c762/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-23 23:30:06,052 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0055ad1-84ac-4722-8f5f-b023e919c762/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-23 23:30:06,053 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-23 23:30:06,053 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:30:06,053 INFO L85 PathProgramCache]: Analyzing trace with hash -271038897, now seen corresponding path program 1 times [2024-11-23 23:30:06,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:30:06,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725647796] [2024-11-23 23:30:06,053 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:30:06,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:30:06,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:30:06,184 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-23 23:30:06,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:30:06,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725647796] [2024-11-23 23:30:06,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725647796] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:30:06,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:30:06,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-23 23:30:06,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051452982] [2024-11-23 23:30:06,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:30:06,185 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 23:30:06,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:30:06,186 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 23:30:06,186 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-23 23:30:06,295 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 87 [2024-11-23 23:30:06,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 106 transitions, 576 flow. Second operand has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:30:06,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:30:06,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 87 [2024-11-23 23:30:06,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:30:07,475 INFO L124 PetriNetUnfolderBase]: 7503/13812 cut-off events. [2024-11-23 23:30:07,475 INFO L125 PetriNetUnfolderBase]: For 12171/12171 co-relation queries the response was YES. [2024-11-23 23:30:07,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31746 conditions, 13812 events. 7503/13812 cut-off events. For 12171/12171 co-relation queries the response was YES. Maximal size of possible extension queue 569. Compared 109789 event pairs, 5993 based on Foata normal form. 239/12235 useless extension candidates. Maximal degree in co-relation 20623. Up to 10822 conditions per place. [2024-11-23 23:30:07,541 INFO L140 encePairwiseOnDemand]: 80/87 looper letters, 63 selfloop transitions, 14 changer transitions 0/102 dead transitions. [2024-11-23 23:30:07,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 102 transitions, 722 flow [2024-11-23 23:30:07,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-23 23:30:07,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-23 23:30:07,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 230 transitions. [2024-11-23 23:30:07,542 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5287356321839081 [2024-11-23 23:30:07,542 INFO L175 Difference]: Start difference. First operand has 119 places, 106 transitions, 576 flow. Second operand 5 states and 230 transitions. [2024-11-23 23:30:07,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 102 transitions, 722 flow [2024-11-23 23:30:07,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 102 transitions, 669 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-11-23 23:30:07,560 INFO L231 Difference]: Finished difference. Result has 113 places, 102 transitions, 543 flow [2024-11-23 23:30:07,560 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=515, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=543, PETRI_PLACES=113, PETRI_TRANSITIONS=102} [2024-11-23 23:30:07,561 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 29 predicate places. [2024-11-23 23:30:07,561 INFO L471 AbstractCegarLoop]: Abstraction has has 113 places, 102 transitions, 543 flow [2024-11-23 23:30:07,561 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:30:07,561 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:30:07,561 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:30:07,561 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-23 23:30:07,561 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-23 23:30:07,562 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:30:07,562 INFO L85 PathProgramCache]: Analyzing trace with hash 381310895, now seen corresponding path program 1 times [2024-11-23 23:30:07,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:30:07,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263912795] [2024-11-23 23:30:07,562 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:30:07,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:30:07,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:30:07,651 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 23:30:07,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:30:07,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263912795] [2024-11-23 23:30:07,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263912795] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:30:07,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:30:07,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-23 23:30:07,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771401644] [2024-11-23 23:30:07,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:30:07,652 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-23 23:30:07,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:30:07,653 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-23 23:30:07,653 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-23 23:30:07,701 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 87 [2024-11-23 23:30:07,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 102 transitions, 543 flow. Second operand has 5 states, 5 states have (on average 48.6) internal successors, (243), 5 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:30:07,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:30:07,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 87 [2024-11-23 23:30:07,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:30:08,546 INFO L124 PetriNetUnfolderBase]: 5704/10508 cut-off events. [2024-11-23 23:30:08,546 INFO L125 PetriNetUnfolderBase]: For 9674/9887 co-relation queries the response was YES. [2024-11-23 23:30:08,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23867 conditions, 10508 events. 5704/10508 cut-off events. For 9674/9887 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 78948 event pairs, 3414 based on Foata normal form. 140/8881 useless extension candidates. Maximal degree in co-relation 15117. Up to 5405 conditions per place. [2024-11-23 23:30:08,588 INFO L140 encePairwiseOnDemand]: 82/87 looper letters, 102 selfloop transitions, 15 changer transitions 0/145 dead transitions. [2024-11-23 23:30:08,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 145 transitions, 973 flow [2024-11-23 23:30:08,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-23 23:30:08,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-23 23:30:08,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 307 transitions. [2024-11-23 23:30:08,590 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7057471264367816 [2024-11-23 23:30:08,590 INFO L175 Difference]: Start difference. First operand has 113 places, 102 transitions, 543 flow. Second operand 5 states and 307 transitions. [2024-11-23 23:30:08,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 145 transitions, 973 flow [2024-11-23 23:30:08,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 145 transitions, 953 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-23 23:30:08,599 INFO L231 Difference]: Finished difference. Result has 116 places, 104 transitions, 577 flow [2024-11-23 23:30:08,599 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=523, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=577, PETRI_PLACES=116, PETRI_TRANSITIONS=104} [2024-11-23 23:30:08,600 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 32 predicate places. [2024-11-23 23:30:08,600 INFO L471 AbstractCegarLoop]: Abstraction has has 116 places, 104 transitions, 577 flow [2024-11-23 23:30:08,600 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 48.6) internal successors, (243), 5 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:30:08,600 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:30:08,600 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:30:08,600 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-23 23:30:08,600 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-23 23:30:08,601 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:30:08,601 INFO L85 PathProgramCache]: Analyzing trace with hash -1804903849, now seen corresponding path program 1 times [2024-11-23 23:30:08,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:30:08,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470406596] [2024-11-23 23:30:08,601 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:30:08,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:30:08,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:30:08,804 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-23 23:30:08,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:30:08,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470406596] [2024-11-23 23:30:08,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470406596] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:30:08,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077466191] [2024-11-23 23:30:08,805 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:30:08,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:30:08,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0055ad1-84ac-4722-8f5f-b023e919c762/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:30:08,807 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0055ad1-84ac-4722-8f5f-b023e919c762/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:30:08,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0055ad1-84ac-4722-8f5f-b023e919c762/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-23 23:30:08,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:30:08,903 INFO L256 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-23 23:30:08,905 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:30:08,911 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 [2024-11-23 23:30:08,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-23 23:30:08,964 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 16 treesize of output 11 [2024-11-23 23:30:08,974 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-23 23:30:08,975 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 [2024-11-23 23:30:09,036 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-23 23:30:09,037 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:30:09,145 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 52 treesize of output 48 [2024-11-23 23:30:09,216 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-23 23:30:09,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077466191] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:30:09,216 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:30:09,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-11-23 23:30:09,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549710014] [2024-11-23 23:30:09,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:30:09,217 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-23 23:30:09,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:30:09,217 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-23 23:30:09,218 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-11-23 23:30:10,279 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 87 [2024-11-23 23:30:10,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 104 transitions, 577 flow. Second operand has 13 states, 13 states have (on average 42.38461538461539) internal successors, (551), 13 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:30:10,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:30:10,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 87 [2024-11-23 23:30:10,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:30:12,080 INFO L124 PetriNetUnfolderBase]: 10512/18442 cut-off events. [2024-11-23 23:30:12,080 INFO L125 PetriNetUnfolderBase]: For 17744/18377 co-relation queries the response was YES. [2024-11-23 23:30:12,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42086 conditions, 18442 events. 10512/18442 cut-off events. For 17744/18377 co-relation queries the response was YES. Maximal size of possible extension queue 660. Compared 144396 event pairs, 3333 based on Foata normal form. 0/15529 useless extension candidates. Maximal degree in co-relation 29583. Up to 5819 conditions per place. [2024-11-23 23:30:12,177 INFO L140 encePairwiseOnDemand]: 75/87 looper letters, 131 selfloop transitions, 27 changer transitions 0/183 dead transitions. [2024-11-23 23:30:12,177 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 183 transitions, 1185 flow [2024-11-23 23:30:12,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-23 23:30:12,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-23 23:30:12,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 487 transitions. [2024-11-23 23:30:12,179 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6219667943805874 [2024-11-23 23:30:12,179 INFO L175 Difference]: Start difference. First operand has 116 places, 104 transitions, 577 flow. Second operand 9 states and 487 transitions. [2024-11-23 23:30:12,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 183 transitions, 1185 flow [2024-11-23 23:30:12,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 183 transitions, 1163 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-23 23:30:12,198 INFO L231 Difference]: Finished difference. Result has 123 places, 105 transitions, 627 flow [2024-11-23 23:30:12,199 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=553, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=627, PETRI_PLACES=123, PETRI_TRANSITIONS=105} [2024-11-23 23:30:12,199 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 39 predicate places. [2024-11-23 23:30:12,199 INFO L471 AbstractCegarLoop]: Abstraction has has 123 places, 105 transitions, 627 flow [2024-11-23 23:30:12,200 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 42.38461538461539) internal successors, (551), 13 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:30:12,200 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:30:12,200 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:30:12,210 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0055ad1-84ac-4722-8f5f-b023e919c762/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-23 23:30:12,404 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0055ad1-84ac-4722-8f5f-b023e919c762/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-23 23:30:12,404 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-23 23:30:12,404 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:30:12,404 INFO L85 PathProgramCache]: Analyzing trace with hash -117443623, now seen corresponding path program 1 times [2024-11-23 23:30:12,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:30:12,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173246870] [2024-11-23 23:30:12,405 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:30:12,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:30:12,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:30:12,464 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-23 23:30:12,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:30:12,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173246870] [2024-11-23 23:30:12,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173246870] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:30:12,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:30:12,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-23 23:30:12,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160435756] [2024-11-23 23:30:12,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:30:12,465 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 23:30:12,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:30:12,465 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 23:30:12,465 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-23 23:30:12,544 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 87 [2024-11-23 23:30:12,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 105 transitions, 627 flow. Second operand has 4 states, 4 states have (on average 41.25) internal successors, (165), 4 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:30:12,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:30:12,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 87 [2024-11-23 23:30:12,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:30:13,944 INFO L124 PetriNetUnfolderBase]: 10024/18025 cut-off events. [2024-11-23 23:30:13,944 INFO L125 PetriNetUnfolderBase]: For 20656/21187 co-relation queries the response was YES. [2024-11-23 23:30:13,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42835 conditions, 18025 events. 10024/18025 cut-off events. For 20656/21187 co-relation queries the response was YES. Maximal size of possible extension queue 625. Compared 142225 event pairs, 8388 based on Foata normal form. 0/16780 useless extension candidates. Maximal degree in co-relation 29241. Up to 14502 conditions per place. [2024-11-23 23:30:14,038 INFO L140 encePairwiseOnDemand]: 81/87 looper letters, 69 selfloop transitions, 9 changer transitions 0/101 dead transitions. [2024-11-23 23:30:14,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 101 transitions, 775 flow [2024-11-23 23:30:14,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-23 23:30:14,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-23 23:30:14,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 196 transitions. [2024-11-23 23:30:14,039 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5632183908045977 [2024-11-23 23:30:14,039 INFO L175 Difference]: Start difference. First operand has 123 places, 105 transitions, 627 flow. Second operand 4 states and 196 transitions. [2024-11-23 23:30:14,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 101 transitions, 775 flow [2024-11-23 23:30:14,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 101 transitions, 725 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-11-23 23:30:14,059 INFO L231 Difference]: Finished difference. Result has 116 places, 101 transitions, 587 flow [2024-11-23 23:30:14,059 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=569, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=587, PETRI_PLACES=116, PETRI_TRANSITIONS=101} [2024-11-23 23:30:14,060 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 32 predicate places. [2024-11-23 23:30:14,060 INFO L471 AbstractCegarLoop]: Abstraction has has 116 places, 101 transitions, 587 flow [2024-11-23 23:30:14,060 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.25) internal successors, (165), 4 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:30:14,060 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:30:14,060 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:30:14,060 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-23 23:30:14,060 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-23 23:30:14,061 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:30:14,061 INFO L85 PathProgramCache]: Analyzing trace with hash -117443622, now seen corresponding path program 1 times [2024-11-23 23:30:14,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:30:14,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558766898] [2024-11-23 23:30:14,061 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:30:14,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:30:14,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:30:14,261 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-23 23:30:14,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:30:14,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558766898] [2024-11-23 23:30:14,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558766898] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:30:14,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663380110] [2024-11-23 23:30:14,262 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:30:14,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:30:14,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0055ad1-84ac-4722-8f5f-b023e919c762/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:30:14,264 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0055ad1-84ac-4722-8f5f-b023e919c762/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:30:14,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0055ad1-84ac-4722-8f5f-b023e919c762/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-23 23:30:14,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:30:14,364 INFO L256 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-23 23:30:14,365 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:30:14,466 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-23 23:30:14,467 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:30:14,530 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-11-23 23:30:14,539 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-23 23:30:14,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663380110] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:30:14,539 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:30:14,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2024-11-23 23:30:14,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607156984] [2024-11-23 23:30:14,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:30:14,540 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-23 23:30:14,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:30:14,541 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-23 23:30:14,542 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-23 23:30:15,137 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 87 [2024-11-23 23:30:15,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 101 transitions, 587 flow. Second operand has 11 states, 11 states have (on average 46.18181818181818) internal successors, (508), 11 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:30:15,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:30:15,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 87 [2024-11-23 23:30:15,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:30:16,436 INFO L124 PetriNetUnfolderBase]: 9570/15634 cut-off events. [2024-11-23 23:30:16,436 INFO L125 PetriNetUnfolderBase]: For 18081/18591 co-relation queries the response was YES. [2024-11-23 23:30:16,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38576 conditions, 15634 events. 9570/15634 cut-off events. For 18081/18591 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 107980 event pairs, 3801 based on Foata normal form. 0/14436 useless extension candidates. Maximal degree in co-relation 26965. Up to 4486 conditions per place. [2024-11-23 23:30:16,526 INFO L140 encePairwiseOnDemand]: 75/87 looper letters, 127 selfloop transitions, 27 changer transitions 0/176 dead transitions. [2024-11-23 23:30:16,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 176 transitions, 1189 flow [2024-11-23 23:30:16,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-23 23:30:16,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-23 23:30:16,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 427 transitions. [2024-11-23 23:30:16,528 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7011494252873564 [2024-11-23 23:30:16,528 INFO L175 Difference]: Start difference. First operand has 116 places, 101 transitions, 587 flow. Second operand 7 states and 427 transitions. [2024-11-23 23:30:16,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 176 transitions, 1189 flow [2024-11-23 23:30:16,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 176 transitions, 1179 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-23 23:30:16,588 INFO L231 Difference]: Finished difference. Result has 121 places, 101 transitions, 647 flow [2024-11-23 23:30:16,589 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=575, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=647, PETRI_PLACES=121, PETRI_TRANSITIONS=101} [2024-11-23 23:30:16,589 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 37 predicate places. [2024-11-23 23:30:16,589 INFO L471 AbstractCegarLoop]: Abstraction has has 121 places, 101 transitions, 647 flow [2024-11-23 23:30:16,589 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 46.18181818181818) internal successors, (508), 11 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:30:16,594 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:30:16,594 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:30:16,610 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0055ad1-84ac-4722-8f5f-b023e919c762/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-23 23:30:16,794 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0055ad1-84ac-4722-8f5f-b023e919c762/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:30:16,794 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-23 23:30:16,795 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:30:16,795 INFO L85 PathProgramCache]: Analyzing trace with hash 19594581, now seen corresponding path program 1 times [2024-11-23 23:30:16,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:30:16,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377024981] [2024-11-23 23:30:16,795 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:30:16,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:30:16,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:30:16,907 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 23:30:16,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:30:16,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377024981] [2024-11-23 23:30:16,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377024981] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:30:16,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815779008] [2024-11-23 23:30:16,908 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:30:16,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:30:16,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0055ad1-84ac-4722-8f5f-b023e919c762/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:30:16,910 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0055ad1-84ac-4722-8f5f-b023e919c762/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:30:16,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0055ad1-84ac-4722-8f5f-b023e919c762/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-23 23:30:17,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:30:17,009 INFO L256 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-23 23:30:17,010 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:30:17,109 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-23 23:30:17,110 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:30:17,203 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-23 23:30:17,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815779008] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:30:17,204 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:30:17,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 16 [2024-11-23 23:30:17,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907565276] [2024-11-23 23:30:17,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:30:17,204 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-23 23:30:17,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:30:17,205 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-23 23:30:17,205 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2024-11-23 23:30:17,613 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 87 [2024-11-23 23:30:17,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 101 transitions, 647 flow. Second operand has 16 states, 16 states have (on average 48.125) internal successors, (770), 16 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:30:17,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:30:17,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 87 [2024-11-23 23:30:17,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:30:21,732 INFO L124 PetriNetUnfolderBase]: 23869/40217 cut-off events. [2024-11-23 23:30:21,732 INFO L125 PetriNetUnfolderBase]: For 57772/59044 co-relation queries the response was YES. [2024-11-23 23:30:21,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102977 conditions, 40217 events. 23869/40217 cut-off events. For 57772/59044 co-relation queries the response was YES. Maximal size of possible extension queue 1386. Compared 336515 event pairs, 6571 based on Foata normal form. 528/37511 useless extension candidates. Maximal degree in co-relation 75157. Up to 8938 conditions per place. [2024-11-23 23:30:21,950 INFO L140 encePairwiseOnDemand]: 74/87 looper letters, 306 selfloop transitions, 63 changer transitions 0/393 dead transitions. [2024-11-23 23:30:21,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 393 transitions, 2849 flow [2024-11-23 23:30:21,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-23 23:30:21,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-11-23 23:30:21,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1630 transitions. [2024-11-23 23:30:21,954 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6460562822037257 [2024-11-23 23:30:21,954 INFO L175 Difference]: Start difference. First operand has 121 places, 101 transitions, 647 flow. Second operand 29 states and 1630 transitions. [2024-11-23 23:30:21,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 393 transitions, 2849 flow [2024-11-23 23:30:22,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 393 transitions, 2713 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-11-23 23:30:22,050 INFO L231 Difference]: Finished difference. Result has 153 places, 146 transitions, 1144 flow [2024-11-23 23:30:22,050 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=595, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=1144, PETRI_PLACES=153, PETRI_TRANSITIONS=146} [2024-11-23 23:30:22,050 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 69 predicate places. [2024-11-23 23:30:22,050 INFO L471 AbstractCegarLoop]: Abstraction has has 153 places, 146 transitions, 1144 flow [2024-11-23 23:30:22,051 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 48.125) internal successors, (770), 16 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:30:22,051 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:30:22,051 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:30:22,057 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0055ad1-84ac-4722-8f5f-b023e919c762/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-23 23:30:22,252 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0055ad1-84ac-4722-8f5f-b023e919c762/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:30:22,252 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-23 23:30:22,253 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:30:22,253 INFO L85 PathProgramCache]: Analyzing trace with hash 446538172, now seen corresponding path program 1 times [2024-11-23 23:30:22,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:30:22,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034537366] [2024-11-23 23:30:22,253 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:30:22,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:30:22,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:30:22,720 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 23:30:22,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:30:22,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034537366] [2024-11-23 23:30:22,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034537366] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:30:22,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035006000] [2024-11-23 23:30:22,721 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:30:22,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:30:22,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0055ad1-84ac-4722-8f5f-b023e919c762/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:30:22,725 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0055ad1-84ac-4722-8f5f-b023e919c762/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:30:22,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0055ad1-84ac-4722-8f5f-b023e919c762/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-23 23:30:22,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:30:22,842 INFO L256 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-23 23:30:22,844 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:30:22,856 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 [2024-11-23 23:30:22,951 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-23 23:30:22,952 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 [2024-11-23 23:30:22,956 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 16 treesize of output 11 [2024-11-23 23:30:22,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-23 23:30:22,987 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 16 treesize of output 11 [2024-11-23 23:30:22,996 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-23 23:30:22,996 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 [2024-11-23 23:30:23,052 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-23 23:30:23,053 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:30:23,321 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 162 treesize of output 156 [2024-11-23 23:30:23,546 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-23 23:30:23,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035006000] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:30:23,547 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:30:23,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 13 [2024-11-23 23:30:23,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250403005] [2024-11-23 23:30:23,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:30:23,548 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-23 23:30:23,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:30:23,548 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-23 23:30:23,549 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2024-11-23 23:30:28,863 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 87 [2024-11-23 23:30:28,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 146 transitions, 1144 flow. Second operand has 15 states, 15 states have (on average 34.93333333333333) internal successors, (524), 15 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:30:28,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:30:28,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 87 [2024-11-23 23:30:28,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:30:39,076 INFO L124 PetriNetUnfolderBase]: 58659/95986 cut-off events. [2024-11-23 23:30:39,076 INFO L125 PetriNetUnfolderBase]: For 142427/145581 co-relation queries the response was YES. [2024-11-23 23:30:39,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 236442 conditions, 95986 events. 58659/95986 cut-off events. For 142427/145581 co-relation queries the response was YES. Maximal size of possible extension queue 3053. Compared 857822 event pairs, 18440 based on Foata normal form. 0/87996 useless extension candidates. Maximal degree in co-relation 229642. Up to 30739 conditions per place. [2024-11-23 23:30:39,605 INFO L140 encePairwiseOnDemand]: 75/87 looper letters, 194 selfloop transitions, 41 changer transitions 0/253 dead transitions. [2024-11-23 23:30:39,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 253 transitions, 2221 flow [2024-11-23 23:30:39,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-23 23:30:39,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-23 23:30:39,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 432 transitions. [2024-11-23 23:30:39,607 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5517241379310345 [2024-11-23 23:30:39,607 INFO L175 Difference]: Start difference. First operand has 153 places, 146 transitions, 1144 flow. Second operand 9 states and 432 transitions. [2024-11-23 23:30:39,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 253 transitions, 2221 flow [2024-11-23 23:30:39,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 253 transitions, 2200 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-23 23:30:39,780 INFO L231 Difference]: Finished difference. Result has 159 places, 147 transitions, 1228 flow [2024-11-23 23:30:39,780 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=1121, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1228, PETRI_PLACES=159, PETRI_TRANSITIONS=147} [2024-11-23 23:30:39,780 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 75 predicate places. [2024-11-23 23:30:39,780 INFO L471 AbstractCegarLoop]: Abstraction has has 159 places, 147 transitions, 1228 flow [2024-11-23 23:30:39,781 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 34.93333333333333) internal successors, (524), 15 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:30:39,781 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:30:39,781 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:30:39,787 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0055ad1-84ac-4722-8f5f-b023e919c762/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-23 23:30:39,981 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0055ad1-84ac-4722-8f5f-b023e919c762/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:30:39,981 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-23 23:30:39,982 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:30:39,982 INFO L85 PathProgramCache]: Analyzing trace with hash 957782311, now seen corresponding path program 1 times [2024-11-23 23:30:39,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:30:39,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659969807] [2024-11-23 23:30:39,982 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:30:39,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:30:39,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:30:40,329 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 23:30:40,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:30:40,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659969807] [2024-11-23 23:30:40,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659969807] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:30:40,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068416801] [2024-11-23 23:30:40,330 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:30:40,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:30:40,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0055ad1-84ac-4722-8f5f-b023e919c762/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:30:40,332 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0055ad1-84ac-4722-8f5f-b023e919c762/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:30:40,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0055ad1-84ac-4722-8f5f-b023e919c762/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-23 23:30:40,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:30:40,443 INFO L256 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-23 23:30:40,450 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:30:40,565 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 23:30:40,565 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:30:40,637 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-11-23 23:30:40,648 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 23:30:40,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068416801] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:30:40,649 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:30:40,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2024-11-23 23:30:40,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537846907] [2024-11-23 23:30:40,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:30:40,650 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-23 23:30:40,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:30:40,650 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-23 23:30:40,651 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-23 23:30:41,200 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 87 [2024-11-23 23:30:41,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 147 transitions, 1228 flow. Second operand has 11 states, 11 states have (on average 46.54545454545455) internal successors, (512), 11 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:30:41,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:30:41,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 87 [2024-11-23 23:30:41,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:30:49,016 INFO L124 PetriNetUnfolderBase]: 43249/69852 cut-off events. [2024-11-23 23:30:49,016 INFO L125 PetriNetUnfolderBase]: For 140527/146845 co-relation queries the response was YES. [2024-11-23 23:30:49,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 186063 conditions, 69852 events. 43249/69852 cut-off events. For 140527/146845 co-relation queries the response was YES. Maximal size of possible extension queue 2398. Compared 594657 event pairs, 16252 based on Foata normal form. 0/67470 useless extension candidates. Maximal degree in co-relation 179536. Up to 20794 conditions per place. [2024-11-23 23:30:49,429 INFO L140 encePairwiseOnDemand]: 75/87 looper letters, 180 selfloop transitions, 41 changer transitions 0/243 dead transitions. [2024-11-23 23:30:49,429 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 243 transitions, 2300 flow [2024-11-23 23:30:49,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-23 23:30:49,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-23 23:30:49,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 423 transitions. [2024-11-23 23:30:49,430 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6945812807881774 [2024-11-23 23:30:49,431 INFO L175 Difference]: Start difference. First operand has 159 places, 147 transitions, 1228 flow. Second operand 7 states and 423 transitions. [2024-11-23 23:30:49,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 243 transitions, 2300 flow [2024-11-23 23:30:49,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 243 transitions, 2222 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-11-23 23:30:49,622 INFO L231 Difference]: Finished difference. Result has 160 places, 147 transitions, 1251 flow [2024-11-23 23:30:49,622 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=1148, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1251, PETRI_PLACES=160, PETRI_TRANSITIONS=147} [2024-11-23 23:30:49,622 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 76 predicate places. [2024-11-23 23:30:49,622 INFO L471 AbstractCegarLoop]: Abstraction has has 160 places, 147 transitions, 1251 flow [2024-11-23 23:30:49,622 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 46.54545454545455) internal successors, (512), 11 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:30:49,623 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:30:49,623 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:30:49,628 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0055ad1-84ac-4722-8f5f-b023e919c762/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-23 23:30:49,823 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0055ad1-84ac-4722-8f5f-b023e919c762/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:30:49,823 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-23 23:30:49,823 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:30:49,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1636249949, now seen corresponding path program 1 times [2024-11-23 23:30:49,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:30:49,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849118637] [2024-11-23 23:30:49,824 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:30:49,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:30:49,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:30:49,923 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-23 23:30:49,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:30:49,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849118637] [2024-11-23 23:30:49,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849118637] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:30:49,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888278031] [2024-11-23 23:30:49,924 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:30:49,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:30:49,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0055ad1-84ac-4722-8f5f-b023e919c762/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:30:49,926 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0055ad1-84ac-4722-8f5f-b023e919c762/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:30:49,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0055ad1-84ac-4722-8f5f-b023e919c762/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-23 23:30:50,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:30:50,035 INFO L256 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-23 23:30:50,037 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:30:50,133 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-23 23:30:50,133 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:30:50,229 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-23 23:30:50,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888278031] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:30:50,231 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:30:50,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2024-11-23 23:30:50,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031728848] [2024-11-23 23:30:50,232 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:30:50,232 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-23 23:30:50,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:30:50,232 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-23 23:30:50,233 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2024-11-23 23:30:50,482 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 87 [2024-11-23 23:30:50,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 147 transitions, 1251 flow. Second operand has 16 states, 16 states have (on average 48.3125) internal successors, (773), 16 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:30:50,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:30:50,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 87 [2024-11-23 23:30:50,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:31:01,758 INFO L124 PetriNetUnfolderBase]: 61214/100274 cut-off events. [2024-11-23 23:31:01,758 INFO L125 PetriNetUnfolderBase]: For 237113/249052 co-relation queries the response was YES. [2024-11-23 23:31:02,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 278294 conditions, 100274 events. 61214/100274 cut-off events. For 237113/249052 co-relation queries the response was YES. Maximal size of possible extension queue 3477. Compared 915209 event pairs, 20242 based on Foata normal form. 1499/98571 useless extension candidates. Maximal degree in co-relation 263205. Up to 26326 conditions per place. [2024-11-23 23:31:02,731 INFO L140 encePairwiseOnDemand]: 75/87 looper letters, 319 selfloop transitions, 76 changer transitions 0/419 dead transitions. [2024-11-23 23:31:02,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 419 transitions, 3669 flow [2024-11-23 23:31:02,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-23 23:31:02,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-11-23 23:31:02,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1229 transitions. [2024-11-23 23:31:02,734 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6726874657909141 [2024-11-23 23:31:02,734 INFO L175 Difference]: Start difference. First operand has 160 places, 147 transitions, 1251 flow. Second operand 21 states and 1229 transitions. [2024-11-23 23:31:02,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 419 transitions, 3669 flow [2024-11-23 23:31:03,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 419 transitions, 3531 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-11-23 23:31:03,004 INFO L231 Difference]: Finished difference. Result has 180 places, 165 transitions, 1555 flow [2024-11-23 23:31:03,004 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=1170, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1555, PETRI_PLACES=180, PETRI_TRANSITIONS=165} [2024-11-23 23:31:03,004 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 96 predicate places. [2024-11-23 23:31:03,004 INFO L471 AbstractCegarLoop]: Abstraction has has 180 places, 165 transitions, 1555 flow [2024-11-23 23:31:03,005 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 48.3125) internal successors, (773), 16 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:31:03,005 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:31:03,005 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:31:03,010 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0055ad1-84ac-4722-8f5f-b023e919c762/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-23 23:31:03,205 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0055ad1-84ac-4722-8f5f-b023e919c762/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-11-23 23:31:03,205 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-23 23:31:03,206 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:31:03,206 INFO L85 PathProgramCache]: Analyzing trace with hash 2145027086, now seen corresponding path program 2 times [2024-11-23 23:31:03,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:31:03,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189996378] [2024-11-23 23:31:03,206 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 23:31:03,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:31:03,228 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 23:31:03,228 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:31:03,654 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-23 23:31:03,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:31:03,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189996378] [2024-11-23 23:31:03,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189996378] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:31:03,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610232478] [2024-11-23 23:31:03,655 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 23:31:03,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:31:03,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0055ad1-84ac-4722-8f5f-b023e919c762/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:31:03,657 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0055ad1-84ac-4722-8f5f-b023e919c762/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:31:03,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0055ad1-84ac-4722-8f5f-b023e919c762/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-23 23:31:03,768 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 23:31:03,768 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:31:03,769 INFO L256 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-23 23:31:03,770 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:31:03,775 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 [2024-11-23 23:31:03,876 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-23 23:31:03,876 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 [2024-11-23 23:31:03,881 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 16 treesize of output 11 [2024-11-23 23:31:03,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-23 23:31:03,945 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 16 treesize of output 11 [2024-11-23 23:31:03,954 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-23 23:31:03,955 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 [2024-11-23 23:31:04,073 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 23:31:04,073 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:31:04,436 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 162 treesize of output 156 [2024-11-23 23:31:04,755 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 23:31:04,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610232478] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:31:04,756 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:31:04,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 23 [2024-11-23 23:31:04,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030226645] [2024-11-23 23:31:04,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:31:04,756 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-23 23:31:04,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:31:04,757 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-23 23:31:04,757 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600