./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/chl-chromosome-trans.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a0165632 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069e0625-e16d-4a2a-979a-19604cfaf054/bin/uautomizer-verify-jihMAELWvX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069e0625-e16d-4a2a-979a-19604cfaf054/bin/uautomizer-verify-jihMAELWvX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069e0625-e16d-4a2a-979a-19604cfaf054/bin/uautomizer-verify-jihMAELWvX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069e0625-e16d-4a2a-979a-19604cfaf054/bin/uautomizer-verify-jihMAELWvX/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-chromosome-trans.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069e0625-e16d-4a2a-979a-19604cfaf054/bin/uautomizer-verify-jihMAELWvX/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069e0625-e16d-4a2a-979a-19604cfaf054/bin/uautomizer-verify-jihMAELWvX --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f36f5593156fc25b34b4c706b0d898a2d66ee8bab5f6d91cd69ff9cf3c129193 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-08 18:00:47,404 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-08 18:00:47,478 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069e0625-e16d-4a2a-979a-19604cfaf054/bin/uautomizer-verify-jihMAELWvX/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-08 18:00:47,482 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-08 18:00:47,483 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-08 18:00:47,510 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-08 18:00:47,510 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-08 18:00:47,511 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-08 18:00:47,512 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-08 18:00:47,513 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-08 18:00:47,513 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-08 18:00:47,514 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-08 18:00:47,515 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-08 18:00:47,515 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-08 18:00:47,518 INFO L153 SettingsManager]: * Use SBE=true [2024-11-08 18:00:47,518 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-08 18:00:47,518 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-08 18:00:47,519 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-08 18:00:47,519 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-08 18:00:47,519 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-08 18:00:47,523 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-08 18:00:47,523 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-08 18:00:47,524 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-08 18:00:47,524 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-08 18:00:47,524 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-08 18:00:47,525 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-08 18:00:47,525 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-08 18:00:47,525 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-08 18:00:47,534 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-08 18:00:47,535 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-08 18:00:47,535 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-08 18:00:47,535 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-08 18:00:47,536 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-08 18:00:47,536 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 18:00:47,536 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-08 18:00:47,537 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-08 18:00:47,537 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-08 18:00:47,537 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-08 18:00:47,537 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-08 18:00:47,538 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-08 18:00:47,538 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-08 18:00:47,539 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-08 18:00:47,539 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069e0625-e16d-4a2a-979a-19604cfaf054/bin/uautomizer-verify-jihMAELWvX/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069e0625-e16d-4a2a-979a-19604cfaf054/bin/uautomizer-verify-jihMAELWvX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f36f5593156fc25b34b4c706b0d898a2d66ee8bab5f6d91cd69ff9cf3c129193 [2024-11-08 18:00:47,826 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-08 18:00:47,850 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-08 18:00:47,855 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-08 18:00:47,856 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-08 18:00:47,857 INFO L274 PluginConnector]: CDTParser initialized [2024-11-08 18:00:47,858 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069e0625-e16d-4a2a-979a-19604cfaf054/bin/uautomizer-verify-jihMAELWvX/../../sv-benchmarks/c/weaver/chl-chromosome-trans.wvr.c Unable to find full path for "g++" [2024-11-08 18:00:49,984 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-08 18:00:50,247 INFO L384 CDTParser]: Found 1 translation units. [2024-11-08 18:00:50,249 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069e0625-e16d-4a2a-979a-19604cfaf054/sv-benchmarks/c/weaver/chl-chromosome-trans.wvr.c [2024-11-08 18:00:50,262 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069e0625-e16d-4a2a-979a-19604cfaf054/bin/uautomizer-verify-jihMAELWvX/data/3653d07f7/6fccd25f62124f93a7a8696aba43c46e/FLAG628b63051 [2024-11-08 18:00:50,289 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069e0625-e16d-4a2a-979a-19604cfaf054/bin/uautomizer-verify-jihMAELWvX/data/3653d07f7/6fccd25f62124f93a7a8696aba43c46e [2024-11-08 18:00:50,292 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-08 18:00:50,295 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-08 18:00:50,298 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-08 18:00:50,299 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-08 18:00:50,304 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-08 18:00:50,305 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 06:00:50" (1/1) ... [2024-11-08 18:00:50,309 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3cd7430d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:00:50, skipping insertion in model container [2024-11-08 18:00:50,309 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 06:00:50" (1/1) ... [2024-11-08 18:00:50,342 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-08 18:00:50,620 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-08 18:00:50,626 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 18:00:50,638 INFO L200 MainTranslator]: Completed pre-run [2024-11-08 18:00:50,676 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 18:00:50,701 INFO L204 MainTranslator]: Completed translation [2024-11-08 18:00:50,701 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:00:50 WrapperNode [2024-11-08 18:00:50,701 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-08 18:00:50,703 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-08 18:00:50,703 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-08 18:00:50,703 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-08 18:00:50,712 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:00:50" (1/1) ... [2024-11-08 18:00:50,721 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:00:50" (1/1) ... [2024-11-08 18:00:50,757 INFO L138 Inliner]: procedures = 25, calls = 32, calls flagged for inlining = 17, calls inlined = 25, statements flattened = 263 [2024-11-08 18:00:50,757 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-08 18:00:50,758 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-08 18:00:50,759 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-08 18:00:50,759 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-08 18:00:50,776 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:00:50" (1/1) ... [2024-11-08 18:00:50,780 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:00:50" (1/1) ... [2024-11-08 18:00:50,785 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:00:50" (1/1) ... [2024-11-08 18:00:50,810 INFO L175 MemorySlicer]: Split 11 memory accesses to 2 slices as follows [2, 9]. 82 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]. [2024-11-08 18:00:50,811 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:00:50" (1/1) ... [2024-11-08 18:00:50,811 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:00:50" (1/1) ... [2024-11-08 18:00:50,821 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:00:50" (1/1) ... [2024-11-08 18:00:50,827 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:00:50" (1/1) ... [2024-11-08 18:00:50,829 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:00:50" (1/1) ... [2024-11-08 18:00:50,831 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:00:50" (1/1) ... [2024-11-08 18:00:50,835 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-08 18:00:50,837 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-08 18:00:50,837 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-08 18:00:50,837 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-08 18:00:50,838 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:00:50" (1/1) ... [2024-11-08 18:00:50,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 18:00:50,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069e0625-e16d-4a2a-979a-19604cfaf054/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:00:50,884 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069e0625-e16d-4a2a-979a-19604cfaf054/bin/uautomizer-verify-jihMAELWvX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-08 18:00:50,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069e0625-e16d-4a2a-979a-19604cfaf054/bin/uautomizer-verify-jihMAELWvX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-08 18:00:50,922 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-08 18:00:50,922 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-08 18:00:50,922 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-08 18:00:50,922 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-08 18:00:50,922 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-08 18:00:50,922 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-08 18:00:50,923 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-08 18:00:50,923 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-08 18:00:50,923 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-08 18:00:50,923 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-08 18:00:50,923 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-08 18:00:50,924 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-08 18:00:50,924 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-08 18:00:50,924 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-08 18:00:50,924 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-08 18:00:50,924 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-08 18:00:50,926 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-08 18:00:51,065 INFO L238 CfgBuilder]: Building ICFG [2024-11-08 18:00:51,067 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-08 18:00:51,685 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-08 18:00:51,685 INFO L287 CfgBuilder]: Performing block encoding [2024-11-08 18:00:52,231 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-08 18:00:52,231 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-08 18:00:52,233 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 06:00:52 BoogieIcfgContainer [2024-11-08 18:00:52,233 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-08 18:00:52,235 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-08 18:00:52,236 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-08 18:00:52,240 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-08 18:00:52,240 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.11 06:00:50" (1/3) ... [2024-11-08 18:00:52,243 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47290fe3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 06:00:52, skipping insertion in model container [2024-11-08 18:00:52,243 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:00:50" (2/3) ... [2024-11-08 18:00:52,243 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47290fe3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 06:00:52, skipping insertion in model container [2024-11-08 18:00:52,244 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 06:00:52" (3/3) ... [2024-11-08 18:00:52,245 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-chromosome-trans.wvr.c [2024-11-08 18:00:52,265 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-08 18:00:52,265 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2024-11-08 18:00:52,265 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-08 18:00:52,364 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-08 18:00:52,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 76 places, 78 transitions, 177 flow [2024-11-08 18:00:52,465 INFO L124 PetriNetUnfolderBase]: 12/75 cut-off events. [2024-11-08 18:00:52,465 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-08 18:00:52,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88 conditions, 75 events. 12/75 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 181 event pairs, 0 based on Foata normal form. 0/43 useless extension candidates. Maximal degree in co-relation 57. Up to 2 conditions per place. [2024-11-08 18:00:52,472 INFO L82 GeneralOperation]: Start removeDead. Operand has 76 places, 78 transitions, 177 flow [2024-11-08 18:00:52,477 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 72 places, 74 transitions, 166 flow [2024-11-08 18:00:52,490 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-08 18:00:52,499 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;@67bf5d7c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-08 18:00:52,500 INFO L334 AbstractCegarLoop]: Starting to check reachability of 35 error locations. [2024-11-08 18:00:52,506 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-08 18:00:52,506 INFO L124 PetriNetUnfolderBase]: 3/10 cut-off events. [2024-11-08 18:00:52,506 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-08 18:00:52,506 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:00:52,507 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-08 18:00:52,508 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-08 18:00:52,514 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:00:52,515 INFO L85 PathProgramCache]: Analyzing trace with hash 26633462, now seen corresponding path program 1 times [2024-11-08 18:00:52,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:00:52,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248801859] [2024-11-08 18:00:52,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:00:52,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:00:52,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:00:52,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:00:52,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:00:52,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248801859] [2024-11-08 18:00:52,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248801859] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:00:52,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:00:52,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-08 18:00:52,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111117063] [2024-11-08 18:00:52,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:00:52,921 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 18:00:52,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:00:52,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 18:00:52,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 18:00:53,060 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 78 [2024-11-08 18:00:53,063 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 74 transitions, 166 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) [2024-11-08 18:00:53,063 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:00:53,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 78 [2024-11-08 18:00:53,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:00:53,318 INFO L124 PetriNetUnfolderBase]: 222/467 cut-off events. [2024-11-08 18:00:53,319 INFO L125 PetriNetUnfolderBase]: For 21/21 co-relation queries the response was YES. [2024-11-08 18:00:53,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 812 conditions, 467 events. 222/467 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2179 event pairs, 124 based on Foata normal form. 1/336 useless extension candidates. Maximal degree in co-relation 687. Up to 293 conditions per place. [2024-11-08 18:00:53,328 INFO L140 encePairwiseOnDemand]: 72/78 looper letters, 27 selfloop transitions, 2 changer transitions 0/69 dead transitions. [2024-11-08 18:00:53,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 69 transitions, 214 flow [2024-11-08 18:00:53,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 18:00:53,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-08 18:00:53,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 165 transitions. [2024-11-08 18:00:53,343 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7051282051282052 [2024-11-08 18:00:53,345 INFO L175 Difference]: Start difference. First operand has 72 places, 74 transitions, 166 flow. Second operand 3 states and 165 transitions. [2024-11-08 18:00:53,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 69 transitions, 214 flow [2024-11-08 18:00:53,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 69 transitions, 202 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-08 18:00:53,358 INFO L231 Difference]: Finished difference. Result has 63 places, 69 transitions, 148 flow [2024-11-08 18:00:53,363 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=148, PETRI_PLACES=63, PETRI_TRANSITIONS=69} [2024-11-08 18:00:53,368 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, -9 predicate places. [2024-11-08 18:00:53,368 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 69 transitions, 148 flow [2024-11-08 18:00:53,369 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) [2024-11-08 18:00:53,369 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:00:53,369 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-08 18:00:53,370 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-08 18:00:53,370 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-08 18:00:53,373 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:00:53,373 INFO L85 PathProgramCache]: Analyzing trace with hash 26633463, now seen corresponding path program 1 times [2024-11-08 18:00:53,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:00:53,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705762296] [2024-11-08 18:00:53,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:00:53,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:00:53,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:00:53,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:00:53,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:00:53,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705762296] [2024-11-08 18:00:53,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705762296] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:00:53,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:00:53,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-08 18:00:53,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034415160] [2024-11-08 18:00:53,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:00:53,697 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 18:00:53,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:00:53,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 18:00:53,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-08 18:00:53,820 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 78 [2024-11-08 18:00:53,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 69 transitions, 148 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) [2024-11-08 18:00:53,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:00:53,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 78 [2024-11-08 18:00:53,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:00:54,013 INFO L124 PetriNetUnfolderBase]: 228/485 cut-off events. [2024-11-08 18:00:54,013 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-08 18:00:54,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 817 conditions, 485 events. 228/485 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2250 event pairs, 124 based on Foata normal form. 0/347 useless extension candidates. Maximal degree in co-relation 749. Up to 306 conditions per place. [2024-11-08 18:00:54,019 INFO L140 encePairwiseOnDemand]: 68/78 looper letters, 34 selfloop transitions, 7 changer transitions 0/78 dead transitions. [2024-11-08 18:00:54,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 78 transitions, 250 flow [2024-11-08 18:00:54,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 18:00:54,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-08 18:00:54,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 176 transitions. [2024-11-08 18:00:54,022 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7521367521367521 [2024-11-08 18:00:54,023 INFO L175 Difference]: Start difference. First operand has 63 places, 69 transitions, 148 flow. Second operand 3 states and 176 transitions. [2024-11-08 18:00:54,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 78 transitions, 250 flow [2024-11-08 18:00:54,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 78 transitions, 244 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-08 18:00:54,026 INFO L231 Difference]: Finished difference. Result has 65 places, 75 transitions, 202 flow [2024-11-08 18:00:54,027 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=202, PETRI_PLACES=65, PETRI_TRANSITIONS=75} [2024-11-08 18:00:54,028 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, -7 predicate places. [2024-11-08 18:00:54,028 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 75 transitions, 202 flow [2024-11-08 18:00:54,028 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) [2024-11-08 18:00:54,029 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:00:54,029 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1] [2024-11-08 18:00:54,029 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-08 18:00:54,029 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-08 18:00:54,030 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:00:54,030 INFO L85 PathProgramCache]: Analyzing trace with hash -1130559488, now seen corresponding path program 1 times [2024-11-08 18:00:54,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:00:54,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25867544] [2024-11-08 18:00:54,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:00:54,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:00:54,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:00:54,361 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:00:54,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:00:54,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25867544] [2024-11-08 18:00:54,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25867544] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:00:54,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498767882] [2024-11-08 18:00:54,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:00:54,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:00:54,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069e0625-e16d-4a2a-979a-19604cfaf054/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:00:54,366 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069e0625-e16d-4a2a-979a-19604cfaf054/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:00:54,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069e0625-e16d-4a2a-979a-19604cfaf054/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-08 18:00:54,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:00:54,479 INFO L255 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-08 18:00:54,483 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:00:54,556 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-08 18:00:54,659 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:00:54,659 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:00:54,797 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:00:54,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498767882] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:00:54,798 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:00:54,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2024-11-08 18:00:54,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286100189] [2024-11-08 18:00:54,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:00:54,799 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-08 18:00:54,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:00:54,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-08 18:00:54,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-11-08 18:00:55,154 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 78 [2024-11-08 18:00:55,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 75 transitions, 202 flow. Second operand has 9 states, 9 states have (on average 39.666666666666664) internal successors, (357), 9 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:00:55,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:00:55,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 78 [2024-11-08 18:00:55,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:00:55,653 INFO L124 PetriNetUnfolderBase]: 246/539 cut-off events. [2024-11-08 18:00:55,653 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2024-11-08 18:00:55,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 973 conditions, 539 events. 246/539 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2630 event pairs, 124 based on Foata normal form. 0/392 useless extension candidates. Maximal degree in co-relation 749. Up to 315 conditions per place. [2024-11-08 18:00:55,659 INFO L140 encePairwiseOnDemand]: 68/78 looper letters, 73 selfloop transitions, 25 changer transitions 0/129 dead transitions. [2024-11-08 18:00:55,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 129 transitions, 554 flow [2024-11-08 18:00:55,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-08 18:00:55,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-08 18:00:55,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 335 transitions. [2024-11-08 18:00:55,662 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7158119658119658 [2024-11-08 18:00:55,662 INFO L175 Difference]: Start difference. First operand has 65 places, 75 transitions, 202 flow. Second operand 6 states and 335 transitions. [2024-11-08 18:00:55,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 129 transitions, 554 flow [2024-11-08 18:00:55,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 129 transitions, 528 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-08 18:00:55,667 INFO L231 Difference]: Finished difference. Result has 71 places, 93 transitions, 363 flow [2024-11-08 18:00:55,667 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=363, PETRI_PLACES=71, PETRI_TRANSITIONS=93} [2024-11-08 18:00:55,668 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, -1 predicate places. [2024-11-08 18:00:55,668 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 93 transitions, 363 flow [2024-11-08 18:00:55,669 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 39.666666666666664) internal successors, (357), 9 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:00:55,669 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:00:55,669 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:00:55,691 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069e0625-e16d-4a2a-979a-19604cfaf054/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-08 18:00:55,873 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069e0625-e16d-4a2a-979a-19604cfaf054/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:00:55,874 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-08 18:00:55,875 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:00:55,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1152070175, now seen corresponding path program 1 times [2024-11-08 18:00:55,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:00:55,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29590751] [2024-11-08 18:00:55,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:00:55,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:00:55,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:00:56,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:00:56,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:00:56,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29590751] [2024-11-08 18:00:56,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29590751] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:00:56,008 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:00:56,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 18:00:56,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770684009] [2024-11-08 18:00:56,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:00:56,009 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 18:00:56,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:00:56,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 18:00:56,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 18:00:56,042 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 78 [2024-11-08 18:00:56,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 93 transitions, 363 flow. Second operand has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:00:56,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:00:56,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 78 [2024-11-08 18:00:56,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:00:56,221 INFO L124 PetriNetUnfolderBase]: 240/530 cut-off events. [2024-11-08 18:00:56,221 INFO L125 PetriNetUnfolderBase]: For 63/63 co-relation queries the response was YES. [2024-11-08 18:00:56,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 994 conditions, 530 events. 240/530 cut-off events. For 63/63 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2397 event pairs, 124 based on Foata normal form. 3/392 useless extension candidates. Maximal degree in co-relation 861. Up to 347 conditions per place. [2024-11-08 18:00:56,228 INFO L140 encePairwiseOnDemand]: 66/78 looper letters, 47 selfloop transitions, 12 changer transitions 0/93 dead transitions. [2024-11-08 18:00:56,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 93 transitions, 473 flow [2024-11-08 18:00:56,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 18:00:56,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-08 18:00:56,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 170 transitions. [2024-11-08 18:00:56,229 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7264957264957265 [2024-11-08 18:00:56,229 INFO L175 Difference]: Start difference. First operand has 71 places, 93 transitions, 363 flow. Second operand 3 states and 170 transitions. [2024-11-08 18:00:56,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 93 transitions, 473 flow [2024-11-08 18:00:56,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 93 transitions, 435 flow, removed 13 selfloop flow, removed 1 redundant places. [2024-11-08 18:00:56,236 INFO L231 Difference]: Finished difference. Result has 73 places, 90 transitions, 359 flow [2024-11-08 18:00:56,236 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=311, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=359, PETRI_PLACES=73, PETRI_TRANSITIONS=90} [2024-11-08 18:00:56,238 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 1 predicate places. [2024-11-08 18:00:56,238 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 90 transitions, 359 flow [2024-11-08 18:00:56,238 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:00:56,238 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:00:56,239 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 1, 1] [2024-11-08 18:00:56,239 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-08 18:00:56,239 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-08 18:00:56,240 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:00:56,240 INFO L85 PathProgramCache]: Analyzing trace with hash 497142711, now seen corresponding path program 2 times [2024-11-08 18:00:56,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:00:56,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896324002] [2024-11-08 18:00:56,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:00:56,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:00:56,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:00:56,922 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:00:56,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:00:56,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896324002] [2024-11-08 18:00:56,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896324002] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:00:56,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491975748] [2024-11-08 18:00:56,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 18:00:56,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:00:56,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069e0625-e16d-4a2a-979a-19604cfaf054/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:00:56,927 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069e0625-e16d-4a2a-979a-19604cfaf054/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:00:56,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069e0625-e16d-4a2a-979a-19604cfaf054/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-08 18:00:57,029 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 18:00:57,030 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 18:00:57,031 INFO L255 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-08 18:00:57,033 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:00:57,048 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-08 18:00:57,384 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 22 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:00:57,384 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:00:57,885 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:00:57,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491975748] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:00:57,886 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:00:57,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2024-11-08 18:00:57,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840508418] [2024-11-08 18:00:57,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:00:57,890 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-08 18:00:57,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:00:57,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-08 18:00:57,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2024-11-08 18:00:58,801 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 78 [2024-11-08 18:00:58,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 90 transitions, 359 flow. Second operand has 20 states, 20 states have (on average 37.4) internal successors, (748), 20 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:00:58,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:00:58,804 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 78 [2024-11-08 18:00:58,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:00:59,545 INFO L124 PetriNetUnfolderBase]: 219/500 cut-off events. [2024-11-08 18:00:59,546 INFO L125 PetriNetUnfolderBase]: For 42/42 co-relation queries the response was YES. [2024-11-08 18:00:59,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 914 conditions, 500 events. 219/500 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2160 event pairs, 124 based on Foata normal form. 27/398 useless extension candidates. Maximal degree in co-relation 789. Up to 293 conditions per place. [2024-11-08 18:00:59,551 INFO L140 encePairwiseOnDemand]: 59/78 looper letters, 52 selfloop transitions, 22 changer transitions 0/102 dead transitions. [2024-11-08 18:00:59,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 102 transitions, 450 flow [2024-11-08 18:00:59,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-08 18:00:59,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-08 18:00:59,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 381 transitions. [2024-11-08 18:00:59,553 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6105769230769231 [2024-11-08 18:00:59,553 INFO L175 Difference]: Start difference. First operand has 73 places, 90 transitions, 359 flow. Second operand 8 states and 381 transitions. [2024-11-08 18:00:59,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 102 transitions, 450 flow [2024-11-08 18:00:59,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 102 transitions, 406 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-11-08 18:00:59,558 INFO L231 Difference]: Finished difference. Result has 76 places, 78 transitions, 320 flow [2024-11-08 18:00:59,558 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=320, PETRI_PLACES=76, PETRI_TRANSITIONS=78} [2024-11-08 18:00:59,559 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 4 predicate places. [2024-11-08 18:00:59,559 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 78 transitions, 320 flow [2024-11-08 18:00:59,560 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 37.4) internal successors, (748), 20 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:00:59,560 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:00:59,560 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:00:59,581 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069e0625-e16d-4a2a-979a-19604cfaf054/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-08 18:00:59,764 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069e0625-e16d-4a2a-979a-19604cfaf054/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:00:59,765 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-08 18:00:59,765 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:00:59,766 INFO L85 PathProgramCache]: Analyzing trace with hash -1189844367, now seen corresponding path program 1 times [2024-11-08 18:00:59,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:00:59,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286292023] [2024-11-08 18:00:59,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:00:59,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:00:59,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:01:00,283 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2024-11-08 18:01:00,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:01:00,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286292023] [2024-11-08 18:01:00,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286292023] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:01:00,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:01:00,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 18:01:00,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378435093] [2024-11-08 18:01:00,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:01:00,285 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 18:01:00,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:01:00,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 18:01:00,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-08 18:01:00,371 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 78 [2024-11-08 18:01:00,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 78 transitions, 320 flow. Second operand has 5 states, 5 states have (on average 43.0) internal successors, (215), 5 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:01:00,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:01:00,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 78 [2024-11-08 18:01:00,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:01:00,609 INFO L124 PetriNetUnfolderBase]: 350/697 cut-off events. [2024-11-08 18:01:00,609 INFO L125 PetriNetUnfolderBase]: For 70/70 co-relation queries the response was YES. [2024-11-08 18:01:00,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1320 conditions, 697 events. 350/697 cut-off events. For 70/70 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3250 event pairs, 221 based on Foata normal form. 0/563 useless extension candidates. Maximal degree in co-relation 1143. Up to 472 conditions per place. [2024-11-08 18:01:00,615 INFO L140 encePairwiseOnDemand]: 73/78 looper letters, 40 selfloop transitions, 3 changer transitions 0/76 dead transitions. [2024-11-08 18:01:00,615 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 76 transitions, 402 flow [2024-11-08 18:01:00,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 18:01:00,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-08 18:01:00,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 233 transitions. [2024-11-08 18:01:00,616 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5974358974358974 [2024-11-08 18:01:00,616 INFO L175 Difference]: Start difference. First operand has 76 places, 78 transitions, 320 flow. Second operand 5 states and 233 transitions. [2024-11-08 18:01:00,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 76 transitions, 402 flow [2024-11-08 18:01:00,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 76 transitions, 364 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-11-08 18:01:00,623 INFO L231 Difference]: Finished difference. Result has 72 places, 76 transitions, 284 flow [2024-11-08 18:01:00,625 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=278, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=284, PETRI_PLACES=72, PETRI_TRANSITIONS=76} [2024-11-08 18:01:00,626 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 0 predicate places. [2024-11-08 18:01:00,626 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 76 transitions, 284 flow [2024-11-08 18:01:00,626 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 43.0) internal successors, (215), 5 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:01:00,626 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:01:00,627 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:01:00,627 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-08 18:01:00,627 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-08 18:01:00,629 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:01:00,629 INFO L85 PathProgramCache]: Analyzing trace with hash -1189844366, now seen corresponding path program 1 times [2024-11-08 18:01:00,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:01:00,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853349527] [2024-11-08 18:01:00,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:01:00,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:01:00,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:01:01,746 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2024-11-08 18:01:01,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:01:01,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853349527] [2024-11-08 18:01:01,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853349527] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:01:01,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296610834] [2024-11-08 18:01:01,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:01:01,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:01:01,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069e0625-e16d-4a2a-979a-19604cfaf054/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:01:01,750 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069e0625-e16d-4a2a-979a-19604cfaf054/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:01:01,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069e0625-e16d-4a2a-979a-19604cfaf054/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-08 18:01:01,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:01:01,921 INFO L255 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-11-08 18:01:01,927 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:01:01,939 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-08 18:01:01,952 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-08 18:01:02,098 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-08 18:01:02,099 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-08 18:01:02,110 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-08 18:01:02,639 INFO L349 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2024-11-08 18:01:02,640 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 25 [2024-11-08 18:01:03,063 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 30 proven. 5 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-08 18:01:03,063 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:01:04,265 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-08 18:01:04,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296610834] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-08 18:01:04,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-08 18:01:04,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9, 9] total 26 [2024-11-08 18:01:04,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907605858] [2024-11-08 18:01:04,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:01:04,267 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-08 18:01:04,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:01:04,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-08 18:01:04,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=581, Unknown=0, NotChecked=0, Total=756 [2024-11-08 18:01:05,214 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 78 [2024-11-08 18:01:05,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 76 transitions, 284 flow. Second operand has 11 states, 11 states have (on average 46.90909090909091) internal successors, (516), 11 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:01:05,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:01:05,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 78 [2024-11-08 18:01:05,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:01:05,825 INFO L124 PetriNetUnfolderBase]: 507/1055 cut-off events. [2024-11-08 18:01:05,826 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2024-11-08 18:01:05,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1868 conditions, 1055 events. 507/1055 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 5692 event pairs, 169 based on Foata normal form. 0/795 useless extension candidates. Maximal degree in co-relation 1699. Up to 351 conditions per place. [2024-11-08 18:01:05,836 INFO L140 encePairwiseOnDemand]: 71/78 looper letters, 54 selfloop transitions, 6 changer transitions 0/93 dead transitions. [2024-11-08 18:01:05,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 93 transitions, 443 flow [2024-11-08 18:01:05,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-08 18:01:05,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-08 18:01:05,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 319 transitions. [2024-11-08 18:01:05,838 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6816239316239316 [2024-11-08 18:01:05,838 INFO L175 Difference]: Start difference. First operand has 72 places, 76 transitions, 284 flow. Second operand 6 states and 319 transitions. [2024-11-08 18:01:05,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 93 transitions, 443 flow [2024-11-08 18:01:05,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 93 transitions, 438 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-08 18:01:05,842 INFO L231 Difference]: Finished difference. Result has 76 places, 77 transitions, 304 flow [2024-11-08 18:01:05,842 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=279, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=304, PETRI_PLACES=76, PETRI_TRANSITIONS=77} [2024-11-08 18:01:05,843 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 4 predicate places. [2024-11-08 18:01:05,843 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 77 transitions, 304 flow [2024-11-08 18:01:05,844 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 46.90909090909091) internal successors, (516), 11 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:01:05,844 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:01:05,844 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:01:05,866 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069e0625-e16d-4a2a-979a-19604cfaf054/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-08 18:01:06,048 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069e0625-e16d-4a2a-979a-19604cfaf054/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-08 18:01:06,049 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-08 18:01:06,049 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:01:06,050 INFO L85 PathProgramCache]: Analyzing trace with hash 1769531152, now seen corresponding path program 1 times [2024-11-08 18:01:06,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:01:06,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284719661] [2024-11-08 18:01:06,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:01:06,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:01:06,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:01:06,276 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2024-11-08 18:01:06,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:01:06,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284719661] [2024-11-08 18:01:06,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284719661] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:01:06,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:01:06,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 18:01:06,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035536390] [2024-11-08 18:01:06,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:01:06,277 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 18:01:06,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:01:06,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 18:01:06,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 18:01:06,348 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 78 [2024-11-08 18:01:06,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 77 transitions, 304 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) [2024-11-08 18:01:06,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:01:06,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 78 [2024-11-08 18:01:06,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:01:06,598 INFO L124 PetriNetUnfolderBase]: 450/926 cut-off events. [2024-11-08 18:01:06,598 INFO L125 PetriNetUnfolderBase]: For 260/287 co-relation queries the response was YES. [2024-11-08 18:01:06,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1832 conditions, 926 events. 450/926 cut-off events. For 260/287 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 4980 event pairs, 315 based on Foata normal form. 29/760 useless extension candidates. Maximal degree in co-relation 1661. Up to 616 conditions per place. [2024-11-08 18:01:06,606 INFO L140 encePairwiseOnDemand]: 73/78 looper letters, 39 selfloop transitions, 3 changer transitions 0/75 dead transitions. [2024-11-08 18:01:06,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 75 transitions, 384 flow [2024-11-08 18:01:06,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 18:01:06,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-08 18:01:06,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 237 transitions. [2024-11-08 18:01:06,608 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6076923076923076 [2024-11-08 18:01:06,608 INFO L175 Difference]: Start difference. First operand has 76 places, 77 transitions, 304 flow. Second operand 5 states and 237 transitions. [2024-11-08 18:01:06,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 75 transitions, 384 flow [2024-11-08 18:01:06,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 75 transitions, 376 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-08 18:01:06,613 INFO L231 Difference]: Finished difference. Result has 74 places, 75 transitions, 298 flow [2024-11-08 18:01:06,613 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=298, PETRI_PLACES=74, PETRI_TRANSITIONS=75} [2024-11-08 18:01:06,614 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 2 predicate places. [2024-11-08 18:01:06,615 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 75 transitions, 298 flow [2024-11-08 18:01:06,616 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) [2024-11-08 18:01:06,616 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:01:06,616 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:01:06,616 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-08 18:01:06,617 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-08 18:01:06,617 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:01:06,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1769531153, now seen corresponding path program 1 times [2024-11-08 18:01:06,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:01:06,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164993134] [2024-11-08 18:01:06,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:01:06,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:01:06,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:01:07,354 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 18 proven. 17 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-08 18:01:07,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:01:07,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164993134] [2024-11-08 18:01:07,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164993134] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:01:07,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603962660] [2024-11-08 18:01:07,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:01:07,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:01:07,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069e0625-e16d-4a2a-979a-19604cfaf054/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:01:07,357 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069e0625-e16d-4a2a-979a-19604cfaf054/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:01:07,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069e0625-e16d-4a2a-979a-19604cfaf054/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-08 18:01:07,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:01:07,516 INFO L255 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-08 18:01:07,519 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:01:07,528 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-08 18:01:07,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 18:01:07,763 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 [2024-11-08 18:01:07,772 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-08 18:01:07,773 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-08 18:01:07,927 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 30 proven. 5 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-08 18:01:07,928 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:01:08,159 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 [2024-11-08 18:01:08,610 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 30 proven. 5 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-08 18:01:08,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603962660] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:01:08,611 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:01:08,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 26 [2024-11-08 18:01:08,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614078323] [2024-11-08 18:01:08,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:01:08,611 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-08 18:01:08,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:01:08,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-08 18:01:08,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=549, Unknown=0, NotChecked=0, Total=702 [2024-11-08 18:01:10,810 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 78 [2024-11-08 18:01:10,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 75 transitions, 298 flow. Second operand has 27 states, 27 states have (on average 45.148148148148145) internal successors, (1219), 27 states have internal predecessors, (1219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:01:10,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:01:10,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 78 [2024-11-08 18:01:10,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:01:11,761 INFO L124 PetriNetUnfolderBase]: 606/1272 cut-off events. [2024-11-08 18:01:11,762 INFO L125 PetriNetUnfolderBase]: For 167/169 co-relation queries the response was YES. [2024-11-08 18:01:11,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2475 conditions, 1272 events. 606/1272 cut-off events. For 167/169 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 6819 event pairs, 143 based on Foata normal form. 42/1048 useless extension candidates. Maximal degree in co-relation 2304. Up to 377 conditions per place. [2024-11-08 18:01:11,775 INFO L140 encePairwiseOnDemand]: 68/78 looper letters, 69 selfloop transitions, 19 changer transitions 0/121 dead transitions. [2024-11-08 18:01:11,776 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 121 transitions, 582 flow [2024-11-08 18:01:11,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-08 18:01:11,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-08 18:01:11,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 735 transitions. [2024-11-08 18:01:11,779 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6282051282051282 [2024-11-08 18:01:11,779 INFO L175 Difference]: Start difference. First operand has 74 places, 75 transitions, 298 flow. Second operand 15 states and 735 transitions. [2024-11-08 18:01:11,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 121 transitions, 582 flow [2024-11-08 18:01:11,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 121 transitions, 577 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-08 18:01:11,783 INFO L231 Difference]: Finished difference. Result has 87 places, 77 transitions, 351 flow [2024-11-08 18:01:11,783 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=293, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=351, PETRI_PLACES=87, PETRI_TRANSITIONS=77} [2024-11-08 18:01:11,785 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 15 predicate places. [2024-11-08 18:01:11,785 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 77 transitions, 351 flow [2024-11-08 18:01:11,786 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 45.148148148148145) internal successors, (1219), 27 states have internal predecessors, (1219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:01:11,786 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:01:11,787 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:01:11,809 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069e0625-e16d-4a2a-979a-19604cfaf054/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-08 18:01:11,990 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069e0625-e16d-4a2a-979a-19604cfaf054/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-11-08 18:01:11,990 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-08 18:01:11,991 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:01:11,991 INFO L85 PathProgramCache]: Analyzing trace with hash 1315729054, now seen corresponding path program 1 times [2024-11-08 18:01:11,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:01:11,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255085849] [2024-11-08 18:01:11,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:01:11,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:01:12,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:01:12,614 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 18 proven. 17 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-08 18:01:12,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:01:12,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255085849] [2024-11-08 18:01:12,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255085849] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:01:12,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13889870] [2024-11-08 18:01:12,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:01:12,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:01:12,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069e0625-e16d-4a2a-979a-19604cfaf054/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:01:12,617 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069e0625-e16d-4a2a-979a-19604cfaf054/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:01:12,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069e0625-e16d-4a2a-979a-19604cfaf054/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-08 18:01:12,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:01:12,780 INFO L255 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-08 18:01:12,783 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:01:12,794 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-08 18:01:12,803 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-08 18:01:12,935 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-08 18:01:12,936 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-11-08 18:01:12,954 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-08 18:01:12,955 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 [2024-11-08 18:01:13,453 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 30 proven. 5 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-08 18:01:13,453 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:01:14,123 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-08 18:01:14,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13889870] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-08 18:01:14,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-08 18:01:14,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9, 9] total 24 [2024-11-08 18:01:14,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086687799] [2024-11-08 18:01:14,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:01:14,127 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-08 18:01:14,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:01:14,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-08 18:01:14,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2024-11-08 18:01:14,833 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 78 [2024-11-08 18:01:14,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 77 transitions, 351 flow. Second operand has 10 states, 10 states have (on average 47.3) internal successors, (473), 10 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:01:14,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:01:14,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 78 [2024-11-08 18:01:14,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:01:15,455 INFO L124 PetriNetUnfolderBase]: 1196/2282 cut-off events. [2024-11-08 18:01:15,455 INFO L125 PetriNetUnfolderBase]: For 1532/1583 co-relation queries the response was YES. [2024-11-08 18:01:15,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4834 conditions, 2282 events. 1196/2282 cut-off events. For 1532/1583 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 14196 event pairs, 441 based on Foata normal form. 0/1769 useless extension candidates. Maximal degree in co-relation 4648. Up to 853 conditions per place. [2024-11-08 18:01:15,477 INFO L140 encePairwiseOnDemand]: 71/78 looper letters, 56 selfloop transitions, 6 changer transitions 0/94 dead transitions. [2024-11-08 18:01:15,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 94 transitions, 537 flow [2024-11-08 18:01:15,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-08 18:01:15,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-08 18:01:15,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 317 transitions. [2024-11-08 18:01:15,479 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6773504273504274 [2024-11-08 18:01:15,479 INFO L175 Difference]: Start difference. First operand has 87 places, 77 transitions, 351 flow. Second operand 6 states and 317 transitions. [2024-11-08 18:01:15,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 94 transitions, 537 flow [2024-11-08 18:01:15,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 94 transitions, 506 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-11-08 18:01:15,483 INFO L231 Difference]: Finished difference. Result has 87 places, 78 transitions, 345 flow [2024-11-08 18:01:15,483 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=320, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=345, PETRI_PLACES=87, PETRI_TRANSITIONS=78} [2024-11-08 18:01:15,484 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 15 predicate places. [2024-11-08 18:01:15,484 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 78 transitions, 345 flow [2024-11-08 18:01:15,484 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 47.3) internal successors, (473), 10 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:01:15,484 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:01:15,484 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:01:15,505 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069e0625-e16d-4a2a-979a-19604cfaf054/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-08 18:01:15,685 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069e0625-e16d-4a2a-979a-19604cfaf054/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-08 18:01:15,685 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-08 18:01:15,686 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:01:15,686 INFO L85 PathProgramCache]: Analyzing trace with hash 2132895857, now seen corresponding path program 1 times [2024-11-08 18:01:15,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:01:15,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995930074] [2024-11-08 18:01:15,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:01:15,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:01:15,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:01:16,052 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-11-08 18:01:16,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:01:16,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995930074] [2024-11-08 18:01:16,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995930074] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:01:16,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172974232] [2024-11-08 18:01:16,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:01:16,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:01:16,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069e0625-e16d-4a2a-979a-19604cfaf054/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:01:16,058 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069e0625-e16d-4a2a-979a-19604cfaf054/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:01:16,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069e0625-e16d-4a2a-979a-19604cfaf054/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-08 18:01:16,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:01:16,246 INFO L255 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-08 18:01:16,249 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:01:16,474 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 30 proven. 5 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-08 18:01:16,474 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:01:16,586 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 [2024-11-08 18:01:16,727 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 30 proven. 5 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-08 18:01:16,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172974232] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:01:16,728 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:01:16,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 21 [2024-11-08 18:01:16,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037453844] [2024-11-08 18:01:16,729 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:01:16,729 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-08 18:01:16,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:01:16,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-08 18:01:16,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2024-11-08 18:01:17,747 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 78 [2024-11-08 18:01:17,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 78 transitions, 345 flow. Second operand has 22 states, 22 states have (on average 40.0) internal successors, (880), 22 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:01:17,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:01:17,749 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 78 [2024-11-08 18:01:17,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:01:18,798 INFO L124 PetriNetUnfolderBase]: 1431/3096 cut-off events. [2024-11-08 18:01:18,799 INFO L125 PetriNetUnfolderBase]: For 2102/2161 co-relation queries the response was YES. [2024-11-08 18:01:18,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6832 conditions, 3096 events. 1431/3096 cut-off events. For 2102/2161 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 22315 event pairs, 458 based on Foata normal form. 130/2642 useless extension candidates. Maximal degree in co-relation 6636. Up to 918 conditions per place. [2024-11-08 18:01:18,841 INFO L140 encePairwiseOnDemand]: 68/78 looper letters, 92 selfloop transitions, 19 changer transitions 0/136 dead transitions. [2024-11-08 18:01:18,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 136 transitions, 771 flow [2024-11-08 18:01:18,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-08 18:01:18,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-08 18:01:18,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 474 transitions. [2024-11-08 18:01:18,845 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6076923076923076 [2024-11-08 18:01:18,845 INFO L175 Difference]: Start difference. First operand has 87 places, 78 transitions, 345 flow. Second operand 10 states and 474 transitions. [2024-11-08 18:01:18,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 136 transitions, 771 flow [2024-11-08 18:01:18,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 136 transitions, 761 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-08 18:01:18,852 INFO L231 Difference]: Finished difference. Result has 94 places, 80 transitions, 395 flow [2024-11-08 18:01:18,852 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=337, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=395, PETRI_PLACES=94, PETRI_TRANSITIONS=80} [2024-11-08 18:01:18,853 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 22 predicate places. [2024-11-08 18:01:18,853 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 80 transitions, 395 flow [2024-11-08 18:01:18,854 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 40.0) internal successors, (880), 22 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:01:18,854 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:01:18,854 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:01:18,874 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069e0625-e16d-4a2a-979a-19604cfaf054/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-08 18:01:19,055 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069e0625-e16d-4a2a-979a-19604cfaf054/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:01:19,055 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-08 18:01:19,055 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:01:19,055 INFO L85 PathProgramCache]: Analyzing trace with hash 2132895856, now seen corresponding path program 1 times [2024-11-08 18:01:19,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:01:19,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31756449] [2024-11-08 18:01:19,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:01:19,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:01:19,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:01:19,198 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2024-11-08 18:01:19,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:01:19,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31756449] [2024-11-08 18:01:19,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31756449] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:01:19,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:01:19,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 18:01:19,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157196437] [2024-11-08 18:01:19,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:01:19,200 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 18:01:19,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:01:19,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 18:01:19,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 18:01:19,253 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 78 [2024-11-08 18:01:19,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 80 transitions, 395 flow. Second operand has 4 states, 4 states have (on average 46.25) internal successors, (185), 4 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:01:19,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:01:19,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 78 [2024-11-08 18:01:19,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:01:19,742 INFO L124 PetriNetUnfolderBase]: 1178/2182 cut-off events. [2024-11-08 18:01:19,743 INFO L125 PetriNetUnfolderBase]: For 2714/2795 co-relation queries the response was YES. [2024-11-08 18:01:19,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5658 conditions, 2182 events. 1178/2182 cut-off events. For 2714/2795 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 13280 event pairs, 848 based on Foata normal form. 111/1841 useless extension candidates. Maximal degree in co-relation 5468. Up to 1614 conditions per place. [2024-11-08 18:01:19,773 INFO L140 encePairwiseOnDemand]: 74/78 looper letters, 43 selfloop transitions, 2 changer transitions 0/78 dead transitions. [2024-11-08 18:01:19,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 78 transitions, 481 flow [2024-11-08 18:01:19,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 18:01:19,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-08 18:01:19,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 199 transitions. [2024-11-08 18:01:19,774 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6378205128205128 [2024-11-08 18:01:19,774 INFO L175 Difference]: Start difference. First operand has 94 places, 80 transitions, 395 flow. Second operand 4 states and 199 transitions. [2024-11-08 18:01:19,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 78 transitions, 481 flow [2024-11-08 18:01:19,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 78 transitions, 450 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-08 18:01:19,780 INFO L231 Difference]: Finished difference. Result has 89 places, 78 transitions, 364 flow [2024-11-08 18:01:19,780 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=360, PETRI_DIFFERENCE_MINUEND_PLACES=86, 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=4, PETRI_FLOW=364, PETRI_PLACES=89, PETRI_TRANSITIONS=78} [2024-11-08 18:01:19,783 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 17 predicate places. [2024-11-08 18:01:19,783 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 78 transitions, 364 flow [2024-11-08 18:01:19,784 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 46.25) internal successors, (185), 4 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:01:19,784 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:01:19,784 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:01:19,784 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-08 18:01:19,784 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-08 18:01:19,785 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:01:19,785 INFO L85 PathProgramCache]: Analyzing trace with hash 143964208, now seen corresponding path program 1 times [2024-11-08 18:01:19,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:01:19,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245475255] [2024-11-08 18:01:19,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:01:19,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:01:19,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:01:20,649 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2024-11-08 18:01:20,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:01:20,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245475255] [2024-11-08 18:01:20,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245475255] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:01:20,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861363559] [2024-11-08 18:01:20,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:01:20,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:01:20,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069e0625-e16d-4a2a-979a-19604cfaf054/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:01:20,653 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069e0625-e16d-4a2a-979a-19604cfaf054/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:01:20,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069e0625-e16d-4a2a-979a-19604cfaf054/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-08 18:01:20,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:01:20,826 INFO L255 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-08 18:01:20,830 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:01:20,844 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-08 18:01:20,849 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-08 18:01:20,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 18:01:20,974 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-08 18:01:20,994 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-08 18:01:20,995 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-08 18:01:21,097 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-08 18:01:21,097 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-11-08 18:01:21,671 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 30 proven. 5 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-08 18:01:21,671 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:01:22,494 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-08 18:01:22,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861363559] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-08 18:01:22,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-08 18:01:22,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 9] total 26 [2024-11-08 18:01:22,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826653969] [2024-11-08 18:01:22,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:01:22,495 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-08 18:01:22,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:01:22,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-08 18:01:22,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=583, Unknown=0, NotChecked=0, Total=756 [2024-11-08 18:01:23,187 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 78 [2024-11-08 18:01:23,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 78 transitions, 364 flow. Second operand has 11 states, 11 states have (on average 47.27272727272727) internal successors, (520), 11 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:01:23,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:01:23,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 78 [2024-11-08 18:01:23,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:01:24,278 INFO L124 PetriNetUnfolderBase]: 2544/4856 cut-off events. [2024-11-08 18:01:24,279 INFO L125 PetriNetUnfolderBase]: For 5729/5934 co-relation queries the response was YES. [2024-11-08 18:01:24,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11979 conditions, 4856 events. 2544/4856 cut-off events. For 5729/5934 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 35493 event pairs, 1073 based on Foata normal form. 0/4011 useless extension candidates. Maximal degree in co-relation 11803. Up to 1910 conditions per place. [2024-11-08 18:01:24,342 INFO L140 encePairwiseOnDemand]: 71/78 looper letters, 58 selfloop transitions, 6 changer transitions 0/95 dead transitions. [2024-11-08 18:01:24,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 95 transitions, 577 flow [2024-11-08 18:01:24,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-08 18:01:24,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-08 18:01:24,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 315 transitions. [2024-11-08 18:01:24,344 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6730769230769231 [2024-11-08 18:01:24,344 INFO L175 Difference]: Start difference. First operand has 89 places, 78 transitions, 364 flow. Second operand 6 states and 315 transitions. [2024-11-08 18:01:24,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 95 transitions, 577 flow [2024-11-08 18:01:24,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 95 transitions, 574 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-08 18:01:24,354 INFO L231 Difference]: Finished difference. Result has 94 places, 79 transitions, 386 flow [2024-11-08 18:01:24,354 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=361, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=386, PETRI_PLACES=94, PETRI_TRANSITIONS=79} [2024-11-08 18:01:24,355 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 22 predicate places. [2024-11-08 18:01:24,355 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 79 transitions, 386 flow [2024-11-08 18:01:24,356 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 47.27272727272727) internal successors, (520), 11 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:01:24,357 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:01:24,357 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:01:24,379 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069e0625-e16d-4a2a-979a-19604cfaf054/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-08 18:01:24,561 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069e0625-e16d-4a2a-979a-19604cfaf054/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-08 18:01:24,562 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-08 18:01:24,562 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:01:24,562 INFO L85 PathProgramCache]: Analyzing trace with hash -325099414, now seen corresponding path program 1 times [2024-11-08 18:01:24,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:01:24,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358615300] [2024-11-08 18:01:24,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:01:24,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:01:24,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:01:25,472 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2024-11-08 18:01:25,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:01:25,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358615300] [2024-11-08 18:01:25,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358615300] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:01:25,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820274812] [2024-11-08 18:01:25,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:01:25,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:01:25,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069e0625-e16d-4a2a-979a-19604cfaf054/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:01:25,473 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069e0625-e16d-4a2a-979a-19604cfaf054/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:01:25,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069e0625-e16d-4a2a-979a-19604cfaf054/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-08 18:01:25,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:01:25,666 INFO L255 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-11-08 18:01:25,670 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:01:25,679 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-08 18:01:25,684 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-08 18:01:25,816 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-08 18:01:25,817 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-08 18:01:25,829 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-08 18:01:26,237 INFO L349 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2024-11-08 18:01:26,238 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 25 [2024-11-08 18:01:27,461 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 30 proven. 8 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-08 18:01:27,461 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:01:28,486 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 35 proven. 3 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-08 18:01:28,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820274812] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:01:28,486 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:01:28,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 28 [2024-11-08 18:01:28,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577365370] [2024-11-08 18:01:28,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:01:28,487 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-08 18:01:28,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:01:28,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-08 18:01:28,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=653, Unknown=0, NotChecked=0, Total=870 [2024-11-08 18:01:30,982 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 78 [2024-11-08 18:01:30,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 79 transitions, 386 flow. Second operand has 30 states, 30 states have (on average 36.06666666666667) internal successors, (1082), 30 states have internal predecessors, (1082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:01:30,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:01:30,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 78 [2024-11-08 18:01:30,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:01:33,140 INFO L124 PetriNetUnfolderBase]: 3961/7503 cut-off events. [2024-11-08 18:01:33,140 INFO L125 PetriNetUnfolderBase]: For 9079/9452 co-relation queries the response was YES. [2024-11-08 18:01:33,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19311 conditions, 7503 events. 3961/7503 cut-off events. For 9079/9452 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 57196 event pairs, 701 based on Foata normal form. 258/6721 useless extension candidates. Maximal degree in co-relation 19111. Up to 1161 conditions per place. [2024-11-08 18:01:33,225 INFO L140 encePairwiseOnDemand]: 69/78 looper letters, 127 selfloop transitions, 14 changer transitions 0/163 dead transitions. [2024-11-08 18:01:33,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 163 transitions, 1006 flow [2024-11-08 18:01:33,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-08 18:01:33,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-08 18:01:33,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 585 transitions. [2024-11-08 18:01:33,228 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2024-11-08 18:01:33,228 INFO L175 Difference]: Start difference. First operand has 94 places, 79 transitions, 386 flow. Second operand 14 states and 585 transitions. [2024-11-08 18:01:33,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 163 transitions, 1006 flow [2024-11-08 18:01:33,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 163 transitions, 990 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-08 18:01:33,244 INFO L231 Difference]: Finished difference. Result has 107 places, 81 transitions, 437 flow [2024-11-08 18:01:33,244 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=378, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=437, PETRI_PLACES=107, PETRI_TRANSITIONS=81} [2024-11-08 18:01:33,245 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 35 predicate places. [2024-11-08 18:01:33,245 INFO L471 AbstractCegarLoop]: Abstraction has has 107 places, 81 transitions, 437 flow [2024-11-08 18:01:33,245 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 36.06666666666667) internal successors, (1082), 30 states have internal predecessors, (1082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:01:33,246 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:01:33,246 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:01:33,267 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069e0625-e16d-4a2a-979a-19604cfaf054/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-08 18:01:33,446 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069e0625-e16d-4a2a-979a-19604cfaf054/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-08 18:01:33,447 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-08 18:01:33,447 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:01:33,447 INFO L85 PathProgramCache]: Analyzing trace with hash 167924011, now seen corresponding path program 1 times [2024-11-08 18:01:33,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:01:33,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585853699] [2024-11-08 18:01:33,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:01:33,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:01:33,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:01:33,740 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2024-11-08 18:01:33,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:01:33,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585853699] [2024-11-08 18:01:33,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585853699] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:01:33,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932843741] [2024-11-08 18:01:33,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:01:33,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:01:33,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069e0625-e16d-4a2a-979a-19604cfaf054/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:01:33,744 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069e0625-e16d-4a2a-979a-19604cfaf054/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:01:33,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069e0625-e16d-4a2a-979a-19604cfaf054/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-08 18:01:33,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:01:33,922 INFO L255 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-08 18:01:33,925 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:01:33,942 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-08 18:01:34,137 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-08 18:01:34,137 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-11-08 18:01:34,296 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 30 proven. 5 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-08 18:01:34,297 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:01:34,465 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2024-11-08 18:01:34,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932843741] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-08 18:01:34,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-08 18:01:34,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 10] total 17 [2024-11-08 18:01:34,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180188493] [2024-11-08 18:01:34,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:01:34,466 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 18:01:34,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:01:34,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 18:01:34,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2024-11-08 18:01:34,589 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 78 [2024-11-08 18:01:34,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 81 transitions, 437 flow. Second operand has 5 states, 5 states have (on average 49.4) internal successors, (247), 5 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:01:34,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:01:34,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 78 [2024-11-08 18:01:34,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:01:35,670 INFO L124 PetriNetUnfolderBase]: 3526/7397 cut-off events. [2024-11-08 18:01:35,670 INFO L125 PetriNetUnfolderBase]: For 11725/12094 co-relation queries the response was YES. [2024-11-08 18:01:35,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19141 conditions, 7397 events. 3526/7397 cut-off events. For 11725/12094 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 60679 event pairs, 1687 based on Foata normal form. 204/6400 useless extension candidates. Maximal degree in co-relation 18953. Up to 3162 conditions per place. [2024-11-08 18:01:35,753 INFO L140 encePairwiseOnDemand]: 73/78 looper letters, 61 selfloop transitions, 4 changer transitions 0/99 dead transitions. [2024-11-08 18:01:35,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 99 transitions, 680 flow [2024-11-08 18:01:35,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 18:01:35,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-08 18:01:35,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 274 transitions. [2024-11-08 18:01:35,755 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7025641025641025 [2024-11-08 18:01:35,755 INFO L175 Difference]: Start difference. First operand has 107 places, 81 transitions, 437 flow. Second operand 5 states and 274 transitions. [2024-11-08 18:01:35,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 99 transitions, 680 flow [2024-11-08 18:01:35,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 99 transitions, 652 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-11-08 18:01:35,777 INFO L231 Difference]: Finished difference. Result has 105 places, 82 transitions, 438 flow [2024-11-08 18:01:35,778 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=419, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=438, PETRI_PLACES=105, PETRI_TRANSITIONS=82} [2024-11-08 18:01:35,778 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 33 predicate places. [2024-11-08 18:01:35,778 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 82 transitions, 438 flow [2024-11-08 18:01:35,779 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 49.4) internal successors, (247), 5 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:01:35,779 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:01:35,779 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:01:35,800 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069e0625-e16d-4a2a-979a-19604cfaf054/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-08 18:01:35,983 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069e0625-e16d-4a2a-979a-19604cfaf054/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-08 18:01:35,984 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-08 18:01:35,984 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:01:35,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1355223446, now seen corresponding path program 1 times [2024-11-08 18:01:35,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:01:35,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43337438] [2024-11-08 18:01:35,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:01:35,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:01:36,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:01:36,788 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 18 proven. 20 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-08 18:01:36,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:01:36,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43337438] [2024-11-08 18:01:36,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43337438] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:01:36,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549610754] [2024-11-08 18:01:36,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:01:36,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:01:36,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069e0625-e16d-4a2a-979a-19604cfaf054/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:01:36,790 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069e0625-e16d-4a2a-979a-19604cfaf054/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:01:36,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069e0625-e16d-4a2a-979a-19604cfaf054/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-08 18:01:36,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:01:36,967 INFO L255 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-08 18:01:36,969 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:01:36,975 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-08 18:01:37,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 18:01:37,160 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 [2024-11-08 18:01:37,168 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-08 18:01:37,168 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-08 18:01:37,332 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 30 proven. 8 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-08 18:01:37,332 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:01:37,564 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 [2024-11-08 18:01:37,937 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 30 proven. 8 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-08 18:01:37,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549610754] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:01:37,937 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:01:37,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 29 [2024-11-08 18:01:37,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219293896] [2024-11-08 18:01:37,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:01:37,938 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-08 18:01:37,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:01:37,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-08 18:01:37,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=701, Unknown=0, NotChecked=0, Total=870 [2024-11-08 18:01:40,639 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 78 [2024-11-08 18:01:40,641 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 82 transitions, 438 flow. Second operand has 30 states, 30 states have (on average 44.333333333333336) internal successors, (1330), 30 states have internal predecessors, (1330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:01:40,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:01:40,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 78 [2024-11-08 18:01:40,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:01:43,458 INFO L124 PetriNetUnfolderBase]: 6666/12595 cut-off events. [2024-11-08 18:01:43,458 INFO L125 PetriNetUnfolderBase]: For 21705/22632 co-relation queries the response was YES. [2024-11-08 18:01:43,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33986 conditions, 12595 events. 6666/12595 cut-off events. For 21705/22632 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 102522 event pairs, 1123 based on Foata normal form. 471/11243 useless extension candidates. Maximal degree in co-relation 33799. Up to 2013 conditions per place. [2024-11-08 18:01:43,592 INFO L140 encePairwiseOnDemand]: 67/78 looper letters, 116 selfloop transitions, 22 changer transitions 0/170 dead transitions. [2024-11-08 18:01:43,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 170 transitions, 1136 flow [2024-11-08 18:01:43,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-08 18:01:43,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-08 18:01:43,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 835 transitions. [2024-11-08 18:01:43,596 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6297134238310709 [2024-11-08 18:01:43,596 INFO L175 Difference]: Start difference. First operand has 105 places, 82 transitions, 438 flow. Second operand 17 states and 835 transitions. [2024-11-08 18:01:43,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 170 transitions, 1136 flow [2024-11-08 18:01:43,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 170 transitions, 1122 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-08 18:01:43,643 INFO L231 Difference]: Finished difference. Result has 122 places, 84 transitions, 507 flow [2024-11-08 18:01:43,643 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=432, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=507, PETRI_PLACES=122, PETRI_TRANSITIONS=84} [2024-11-08 18:01:43,644 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 50 predicate places. [2024-11-08 18:01:43,644 INFO L471 AbstractCegarLoop]: Abstraction has has 122 places, 84 transitions, 507 flow [2024-11-08 18:01:43,644 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 44.333333333333336) internal successors, (1330), 30 states have internal predecessors, (1330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:01:43,645 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:01:43,645 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:01:43,669 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069e0625-e16d-4a2a-979a-19604cfaf054/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-08 18:01:43,845 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069e0625-e16d-4a2a-979a-19604cfaf054/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-08 18:01:43,846 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-08 18:01:43,846 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:01:43,846 INFO L85 PathProgramCache]: Analyzing trace with hash -1011751640, now seen corresponding path program 1 times [2024-11-08 18:01:43,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:01:43,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388365072] [2024-11-08 18:01:43,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:01:43,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:01:43,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:01:44,969 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2024-11-08 18:01:44,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:01:44,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388365072] [2024-11-08 18:01:44,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388365072] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:01:44,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694443521] [2024-11-08 18:01:44,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:01:44,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:01:44,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069e0625-e16d-4a2a-979a-19604cfaf054/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:01:44,973 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069e0625-e16d-4a2a-979a-19604cfaf054/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:01:44,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069e0625-e16d-4a2a-979a-19604cfaf054/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-08 18:01:45,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:01:45,203 INFO L255 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-11-08 18:01:45,208 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:01:45,212 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-08 18:01:45,299 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-11-08 18:01:45,300 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2024-11-08 18:01:45,450 INFO L349 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2024-11-08 18:01:45,450 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 22 [2024-11-08 18:01:46,088 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-08 18:01:46,089 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:01:46,731 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 35 proven. 3 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-08 18:01:46,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694443521] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:01:46,731 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:01:46,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 29 [2024-11-08 18:01:46,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322716803] [2024-11-08 18:01:46,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:01:46,732 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-08 18:01:46,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:01:46,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-08 18:01:46,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2024-11-08 18:01:48,898 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 78 [2024-11-08 18:01:48,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 84 transitions, 507 flow. Second operand has 31 states, 31 states have (on average 33.354838709677416) internal successors, (1034), 31 states have internal predecessors, (1034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:01:48,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:01:48,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 78 [2024-11-08 18:01:48,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:01:54,082 INFO L124 PetriNetUnfolderBase]: 13195/25132 cut-off events. [2024-11-08 18:01:54,083 INFO L125 PetriNetUnfolderBase]: For 54017/55521 co-relation queries the response was YES. [2024-11-08 18:01:54,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69369 conditions, 25132 events. 13195/25132 cut-off events. For 54017/55521 co-relation queries the response was YES. Maximal size of possible extension queue 795. Compared 229804 event pairs, 2903 based on Foata normal form. 966/22456 useless extension candidates. Maximal degree in co-relation 69102. Up to 4506 conditions per place. [2024-11-08 18:01:54,575 INFO L140 encePairwiseOnDemand]: 67/78 looper letters, 145 selfloop transitions, 27 changer transitions 0/196 dead transitions. [2024-11-08 18:01:54,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 196 transitions, 1503 flow [2024-11-08 18:01:54,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-08 18:01:54,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-11-08 18:01:54,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 745 transitions. [2024-11-08 18:01:54,579 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4775641025641026 [2024-11-08 18:01:54,580 INFO L175 Difference]: Start difference. First operand has 122 places, 84 transitions, 507 flow. Second operand 20 states and 745 transitions. [2024-11-08 18:01:54,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 196 transitions, 1503 flow [2024-11-08 18:01:54,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 196 transitions, 1419 flow, removed 10 selfloop flow, removed 14 redundant places. [2024-11-08 18:01:54,661 INFO L231 Difference]: Finished difference. Result has 132 places, 92 transitions, 598 flow [2024-11-08 18:01:54,661 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=465, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=598, PETRI_PLACES=132, PETRI_TRANSITIONS=92} [2024-11-08 18:01:54,662 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 60 predicate places. [2024-11-08 18:01:54,663 INFO L471 AbstractCegarLoop]: Abstraction has has 132 places, 92 transitions, 598 flow [2024-11-08 18:01:54,663 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 33.354838709677416) internal successors, (1034), 31 states have internal predecessors, (1034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:01:54,664 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:01:54,664 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:01:54,687 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069e0625-e16d-4a2a-979a-19604cfaf054/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-08 18:01:54,864 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069e0625-e16d-4a2a-979a-19604cfaf054/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-08 18:01:54,865 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-08 18:01:54,865 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:01:54,865 INFO L85 PathProgramCache]: Analyzing trace with hash -1299528909, now seen corresponding path program 1 times [2024-11-08 18:01:54,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:01:54,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922307863] [2024-11-08 18:01:54,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:01:54,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:01:54,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:01:55,424 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-11-08 18:01:55,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:01:55,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922307863] [2024-11-08 18:01:55,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922307863] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:01:55,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342931930] [2024-11-08 18:01:55,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:01:55,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:01:55,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069e0625-e16d-4a2a-979a-19604cfaf054/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:01:55,427 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069e0625-e16d-4a2a-979a-19604cfaf054/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:01:55,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069e0625-e16d-4a2a-979a-19604cfaf054/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-08 18:01:55,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:01:55,627 INFO L255 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-11-08 18:01:55,630 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:01:55,641 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-08 18:01:55,824 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-08 18:01:55,824 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-11-08 18:01:55,977 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 30 proven. 9 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-08 18:01:55,978 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:01:56,174 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2024-11-08 18:01:56,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342931930] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:01:56,174 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:01:56,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11, 5] total 18 [2024-11-08 18:01:56,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095172086] [2024-11-08 18:01:56,175 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:01:56,175 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-08 18:01:56,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:01:56,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-08 18:01:56,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2024-11-08 18:01:57,401 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 78 [2024-11-08 18:01:57,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 92 transitions, 598 flow. Second operand has 19 states, 19 states have (on average 40.31578947368421) internal successors, (766), 19 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:01:57,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:01:57,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 78 [2024-11-08 18:01:57,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:02:01,855 INFO L124 PetriNetUnfolderBase]: 10310/21160 cut-off events. [2024-11-08 18:02:01,855 INFO L125 PetriNetUnfolderBase]: For 42453/43565 co-relation queries the response was YES. [2024-11-08 18:02:02,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60202 conditions, 21160 events. 10310/21160 cut-off events. For 42453/43565 co-relation queries the response was YES. Maximal size of possible extension queue 658. Compared 199467 event pairs, 2903 based on Foata normal form. 966/18313 useless extension candidates. Maximal degree in co-relation 59934. Up to 4828 conditions per place. [2024-11-08 18:02:02,074 INFO L140 encePairwiseOnDemand]: 68/78 looper letters, 140 selfloop transitions, 22 changer transitions 0/189 dead transitions. [2024-11-08 18:02:02,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 189 transitions, 1457 flow [2024-11-08 18:02:02,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-08 18:02:02,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-08 18:02:02,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 571 transitions. [2024-11-08 18:02:02,076 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6100427350427351 [2024-11-08 18:02:02,076 INFO L175 Difference]: Start difference. First operand has 132 places, 92 transitions, 598 flow. Second operand 12 states and 571 transitions. [2024-11-08 18:02:02,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 189 transitions, 1457 flow [2024-11-08 18:02:02,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 189 transitions, 1412 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-11-08 18:02:02,226 INFO L231 Difference]: Finished difference. Result has 135 places, 93 transitions, 622 flow [2024-11-08 18:02:02,226 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=553, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=622, PETRI_PLACES=135, PETRI_TRANSITIONS=93} [2024-11-08 18:02:02,226 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 63 predicate places. [2024-11-08 18:02:02,226 INFO L471 AbstractCegarLoop]: Abstraction has has 135 places, 93 transitions, 622 flow [2024-11-08 18:02:02,227 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 40.31578947368421) internal successors, (766), 19 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:02:02,227 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:02:02,227 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:02:02,240 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069e0625-e16d-4a2a-979a-19604cfaf054/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-08 18:02:02,427 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069e0625-e16d-4a2a-979a-19604cfaf054/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-08 18:02:02,427 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-08 18:02:02,428 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:02:02,428 INFO L85 PathProgramCache]: Analyzing trace with hash -729500383, now seen corresponding path program 1 times [2024-11-08 18:02:02,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:02:02,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785698388] [2024-11-08 18:02:02,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:02:02,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:02:02,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:02:03,200 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 18 proven. 29 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-08 18:02:03,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:02:03,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785698388] [2024-11-08 18:02:03,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785698388] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:02:03,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700856365] [2024-11-08 18:02:03,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:02:03,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:02:03,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069e0625-e16d-4a2a-979a-19604cfaf054/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:02:03,204 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069e0625-e16d-4a2a-979a-19604cfaf054/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:02:03,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069e0625-e16d-4a2a-979a-19604cfaf054/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-08 18:02:03,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:02:03,387 INFO L255 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-08 18:02:03,389 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:02:03,395 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-08 18:02:03,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 18:02:03,577 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 [2024-11-08 18:02:03,590 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-08 18:02:03,591 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-08 18:02:03,785 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 30 proven. 17 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-08 18:02:03,785 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:02:04,173 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 [2024-11-08 18:02:04,539 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 30 proven. 17 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-08 18:02:04,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700856365] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:02:04,539 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:02:04,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 32 [2024-11-08 18:02:04,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191947557] [2024-11-08 18:02:04,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:02:04,540 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-08 18:02:04,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:02:04,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-08 18:02:04,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=869, Unknown=0, NotChecked=0, Total=1056 [2024-11-08 18:02:07,835 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 78 [2024-11-08 18:02:07,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 93 transitions, 622 flow. Second operand has 33 states, 33 states have (on average 44.93939393939394) internal successors, (1483), 33 states have internal predecessors, (1483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:02:07,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:02:07,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 78 [2024-11-08 18:02:07,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:02:13,909 INFO L124 PetriNetUnfolderBase]: 12099/24131 cut-off events. [2024-11-08 18:02:13,909 INFO L125 PetriNetUnfolderBase]: For 70706/72748 co-relation queries the response was YES. [2024-11-08 18:02:14,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74509 conditions, 24131 events. 12099/24131 cut-off events. For 70706/72748 co-relation queries the response was YES. Maximal size of possible extension queue 718. Compared 225277 event pairs, 2425 based on Foata normal form. 798/20996 useless extension candidates. Maximal degree in co-relation 74263. Up to 4086 conditions per place. [2024-11-08 18:02:14,192 INFO L140 encePairwiseOnDemand]: 68/78 looper letters, 163 selfloop transitions, 23 changer transitions 0/222 dead transitions. [2024-11-08 18:02:14,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 222 transitions, 1796 flow [2024-11-08 18:02:14,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-08 18:02:14,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-11-08 18:02:14,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 916 transitions. [2024-11-08 18:02:14,194 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6524216524216524 [2024-11-08 18:02:14,194 INFO L175 Difference]: Start difference. First operand has 135 places, 93 transitions, 622 flow. Second operand 18 states and 916 transitions. [2024-11-08 18:02:14,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 222 transitions, 1796 flow [2024-11-08 18:02:14,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 222 transitions, 1702 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-11-08 18:02:14,307 INFO L231 Difference]: Finished difference. Result has 145 places, 95 transitions, 656 flow [2024-11-08 18:02:14,307 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=578, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=656, PETRI_PLACES=145, PETRI_TRANSITIONS=95} [2024-11-08 18:02:14,307 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 73 predicate places. [2024-11-08 18:02:14,307 INFO L471 AbstractCegarLoop]: Abstraction has has 145 places, 95 transitions, 656 flow [2024-11-08 18:02:14,308 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 44.93939393939394) internal successors, (1483), 33 states have internal predecessors, (1483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:02:14,308 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:02:14,308 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:02:14,326 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069e0625-e16d-4a2a-979a-19604cfaf054/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-08 18:02:14,508 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069e0625-e16d-4a2a-979a-19604cfaf054/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:02:14,508 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-08 18:02:14,509 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:02:14,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1179098241, now seen corresponding path program 1 times [2024-11-08 18:02:14,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:02:14,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250992549] [2024-11-08 18:02:14,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:02:14,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:02:14,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:02:15,079 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-11-08 18:02:15,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:02:15,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250992549] [2024-11-08 18:02:15,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250992549] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:02:15,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295420124] [2024-11-08 18:02:15,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:02:15,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:02:15,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069e0625-e16d-4a2a-979a-19604cfaf054/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:02:15,083 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069e0625-e16d-4a2a-979a-19604cfaf054/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:02:15,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069e0625-e16d-4a2a-979a-19604cfaf054/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-08 18:02:15,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:02:15,326 INFO L255 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-08 18:02:15,329 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:02:15,685 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 30 proven. 17 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-08 18:02:15,686 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:02:15,908 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-11-08 18:02:16,076 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 30 proven. 17 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-08 18:02:16,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295420124] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:02:16,076 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:02:16,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 11] total 28 [2024-11-08 18:02:16,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508712976] [2024-11-08 18:02:16,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:02:16,077 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-08 18:02:16,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:02:16,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-08 18:02:16,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=675, Unknown=0, NotChecked=0, Total=812 [2024-11-08 18:02:18,189 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 78 [2024-11-08 18:02:18,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 95 transitions, 656 flow. Second operand has 29 states, 29 states have (on average 39.55172413793103) internal successors, (1147), 29 states have internal predecessors, (1147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:02:18,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:02:18,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 78 [2024-11-08 18:02:18,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:02:24,893 INFO L124 PetriNetUnfolderBase]: 15327/31707 cut-off events. [2024-11-08 18:02:24,893 INFO L125 PetriNetUnfolderBase]: For 96548/98795 co-relation queries the response was YES. [2024-11-08 18:02:25,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97800 conditions, 31707 events. 15327/31707 cut-off events. For 96548/98795 co-relation queries the response was YES. Maximal size of possible extension queue 826. Compared 308451 event pairs, 2713 based on Foata normal form. 1134/27406 useless extension candidates. Maximal degree in co-relation 97530. Up to 5354 conditions per place. [2024-11-08 18:02:25,442 INFO L140 encePairwiseOnDemand]: 68/78 looper letters, 186 selfloop transitions, 23 changer transitions 0/236 dead transitions. [2024-11-08 18:02:25,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 236 transitions, 2039 flow [2024-11-08 18:02:25,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-08 18:02:25,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-08 18:02:25,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 631 transitions. [2024-11-08 18:02:25,444 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6222879684418146 [2024-11-08 18:02:25,444 INFO L175 Difference]: Start difference. First operand has 145 places, 95 transitions, 656 flow. Second operand 13 states and 631 transitions. [2024-11-08 18:02:25,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 236 transitions, 2039 flow [2024-11-08 18:02:25,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 236 transitions, 1970 flow, removed 0 selfloop flow, removed 14 redundant places. [2024-11-08 18:02:25,614 INFO L231 Difference]: Finished difference. Result has 146 places, 97 transitions, 695 flow [2024-11-08 18:02:25,614 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=617, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=695, PETRI_PLACES=146, PETRI_TRANSITIONS=97} [2024-11-08 18:02:25,614 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 74 predicate places. [2024-11-08 18:02:25,615 INFO L471 AbstractCegarLoop]: Abstraction has has 146 places, 97 transitions, 695 flow [2024-11-08 18:02:25,615 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 39.55172413793103) internal successors, (1147), 29 states have internal predecessors, (1147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:02:25,615 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:02:25,616 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:02:25,633 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069e0625-e16d-4a2a-979a-19604cfaf054/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-08 18:02:25,820 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069e0625-e16d-4a2a-979a-19604cfaf054/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:02:25,820 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-08 18:02:25,821 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:02:25,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1591885252, now seen corresponding path program 1 times [2024-11-08 18:02:25,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:02:25,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977433178] [2024-11-08 18:02:25,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:02:25,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:02:25,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:02:26,034 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2024-11-08 18:02:26,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:02:26,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977433178] [2024-11-08 18:02:26,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977433178] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:02:26,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:02:26,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-08 18:02:26,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543417733] [2024-11-08 18:02:26,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:02:26,036 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 18:02:26,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:02:26,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 18:02:26,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-08 18:02:26,060 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 78 [2024-11-08 18:02:26,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 97 transitions, 695 flow. Second operand has 5 states, 5 states have (on average 48.4) internal successors, (242), 5 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:02:26,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:02:26,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 78 [2024-11-08 18:02:26,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:02:35,853 INFO L124 PetriNetUnfolderBase]: 30019/46018 cut-off events. [2024-11-08 18:02:35,853 INFO L125 PetriNetUnfolderBase]: For 175387/178403 co-relation queries the response was YES. [2024-11-08 18:02:36,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 167043 conditions, 46018 events. 30019/46018 cut-off events. For 175387/178403 co-relation queries the response was YES. Maximal size of possible extension queue 1266. Compared 360573 event pairs, 20756 based on Foata normal form. 36/40970 useless extension candidates. Maximal degree in co-relation 166791. Up to 34476 conditions per place. [2024-11-08 18:02:36,743 INFO L140 encePairwiseOnDemand]: 73/78 looper letters, 102 selfloop transitions, 4 changer transitions 2/141 dead transitions. [2024-11-08 18:02:36,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 141 transitions, 1276 flow [2024-11-08 18:02:36,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 18:02:36,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-08 18:02:36,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 231 transitions. [2024-11-08 18:02:36,744 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7403846153846154 [2024-11-08 18:02:36,744 INFO L175 Difference]: Start difference. First operand has 146 places, 97 transitions, 695 flow. Second operand 4 states and 231 transitions. [2024-11-08 18:02:36,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 141 transitions, 1276 flow [2024-11-08 18:02:37,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 141 transitions, 1225 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-11-08 18:02:37,096 INFO L231 Difference]: Finished difference. Result has 142 places, 99 transitions, 680 flow [2024-11-08 18:02:37,097 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=656, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=680, PETRI_PLACES=142, PETRI_TRANSITIONS=99} [2024-11-08 18:02:37,097 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 70 predicate places. [2024-11-08 18:02:37,097 INFO L471 AbstractCegarLoop]: Abstraction has has 142 places, 99 transitions, 680 flow [2024-11-08 18:02:37,097 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 48.4) internal successors, (242), 5 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:02:37,098 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:02:37,098 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:02:37,098 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-11-08 18:02:37,098 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-08 18:02:37,098 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:02:37,098 INFO L85 PathProgramCache]: Analyzing trace with hash -1475225006, now seen corresponding path program 2 times [2024-11-08 18:02:37,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:02:37,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764479261] [2024-11-08 18:02:37,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:02:37,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:02:37,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:02:38,443 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 12 proven. 46 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2024-11-08 18:02:38,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:02:38,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764479261] [2024-11-08 18:02:38,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764479261] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:02:38,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711521377] [2024-11-08 18:02:38,444 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 18:02:38,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:02:38,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069e0625-e16d-4a2a-979a-19604cfaf054/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:02:38,446 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069e0625-e16d-4a2a-979a-19604cfaf054/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:02:38,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_069e0625-e16d-4a2a-979a-19604cfaf054/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-08 18:02:38,695 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 18:02:38,695 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 18:02:38,698 INFO L255 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-11-08 18:02:38,702 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:02:38,711 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-08 18:02:38,714 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-08 18:02:38,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 18:02:38,850 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-08 18:02:38,874 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-08 18:02:38,875 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2024-11-08 18:02:39,166 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-08 18:02:39,166 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-08 18:02:39,172 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-08 18:02:40,024 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 30 proven. 41 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-08 18:02:40,024 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:02:41,270 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 35 proven. 36 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-08 18:02:41,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711521377] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:02:41,270 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:02:41,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 37 [2024-11-08 18:02:41,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92913332] [2024-11-08 18:02:41,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:02:41,271 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-11-08 18:02:41,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:02:41,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-11-08 18:02:41,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=1161, Unknown=0, NotChecked=0, Total=1482 [2024-11-08 18:02:45,645 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 78 [2024-11-08 18:02:45,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 99 transitions, 680 flow. Second operand has 39 states, 39 states have (on average 32.82051282051282) internal successors, (1280), 39 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:02:45,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:02:45,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 78 [2024-11-08 18:02:45,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand