./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/chl-word-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 826ab2ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-word-symm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd --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 bf81f7b3bd1ceac2bf46c7c37f69effc0af9de17b18c7565156301fb49a6164e --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-13 16:28:06,364 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-13 16:28:06,424 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-13 16:28:06,429 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-13 16:28:06,429 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-13 16:28:06,454 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-13 16:28:06,455 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-13 16:28:06,455 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-13 16:28:06,455 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-13 16:28:06,455 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-13 16:28:06,456 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-13 16:28:06,456 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-13 16:28:06,456 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-13 16:28:06,456 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-13 16:28:06,456 INFO L153 SettingsManager]: * Use SBE=true [2024-11-13 16:28:06,456 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-13 16:28:06,456 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-13 16:28:06,457 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-13 16:28:06,457 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-13 16:28:06,457 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-13 16:28:06,457 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-13 16:28:06,457 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-13 16:28:06,457 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-13 16:28:06,457 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-13 16:28:06,457 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-13 16:28:06,458 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-13 16:28:06,458 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-13 16:28:06,458 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-13 16:28:06,458 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-13 16:28:06,458 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-13 16:28:06,458 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-13 16:28:06,458 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-13 16:28:06,458 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-13 16:28:06,458 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 16:28:06,458 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-13 16:28:06,459 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-13 16:28:06,459 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-13 16:28:06,459 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-13 16:28:06,459 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-13 16:28:06,459 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-13 16:28:06,459 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-13 16:28:06,459 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-13 16:28:06,459 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd 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 -> bf81f7b3bd1ceac2bf46c7c37f69effc0af9de17b18c7565156301fb49a6164e [2024-11-13 16:28:06,745 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-13 16:28:06,757 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-13 16:28:06,759 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-13 16:28:06,761 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-13 16:28:06,761 INFO L274 PluginConnector]: CDTParser initialized [2024-11-13 16:28:06,763 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/../../sv-benchmarks/c/weaver/chl-word-symm.wvr.c Unable to find full path for "g++" [2024-11-13 16:28:08,551 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-13 16:28:08,834 INFO L384 CDTParser]: Found 1 translation units. [2024-11-13 16:28:08,834 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/sv-benchmarks/c/weaver/chl-word-symm.wvr.c [2024-11-13 16:28:08,843 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/data/9f44998cb/15ba9c7d86e64876a8752e36cc64ebff/FLAGa8d9d74ab [2024-11-13 16:28:08,866 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/data/9f44998cb/15ba9c7d86e64876a8752e36cc64ebff [2024-11-13 16:28:08,869 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-13 16:28:08,871 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-13 16:28:08,873 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-13 16:28:08,874 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-13 16:28:08,901 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-13 16:28:08,903 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 04:28:08" (1/1) ... [2024-11-13 16:28:08,904 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f86b21d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:28:08, skipping insertion in model container [2024-11-13 16:28:08,905 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 04:28:08" (1/1) ... [2024-11-13 16:28:08,931 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-13 16:28:09,121 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-13 16:28:09,123 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 16:28:09,133 INFO L200 MainTranslator]: Completed pre-run [2024-11-13 16:28:09,166 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 16:28:09,182 INFO L204 MainTranslator]: Completed translation [2024-11-13 16:28:09,182 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:28:09 WrapperNode [2024-11-13 16:28:09,182 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-13 16:28:09,183 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-13 16:28:09,183 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-13 16:28:09,183 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-13 16:28:09,188 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:28:09" (1/1) ... [2024-11-13 16:28:09,196 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:28:09" (1/1) ... [2024-11-13 16:28:09,214 INFO L138 Inliner]: procedures = 23, calls = 26, calls flagged for inlining = 10, calls inlined = 12, statements flattened = 123 [2024-11-13 16:28:09,214 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-13 16:28:09,214 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-13 16:28:09,215 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-13 16:28:09,215 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-13 16:28:09,223 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:28:09" (1/1) ... [2024-11-13 16:28:09,224 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:28:09" (1/1) ... [2024-11-13 16:28:09,232 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:28:09" (1/1) ... [2024-11-13 16:28:09,262 INFO L175 MemorySlicer]: Split 12 memory accesses to 2 slices as follows [2, 10]. 83 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-11-13 16:28:09,262 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:28:09" (1/1) ... [2024-11-13 16:28:09,263 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:28:09" (1/1) ... [2024-11-13 16:28:09,278 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:28:09" (1/1) ... [2024-11-13 16:28:09,285 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:28:09" (1/1) ... [2024-11-13 16:28:09,289 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:28:09" (1/1) ... [2024-11-13 16:28:09,291 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:28:09" (1/1) ... [2024-11-13 16:28:09,295 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-13 16:28:09,296 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-13 16:28:09,296 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-13 16:28:09,296 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-13 16:28:09,297 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:28:09" (1/1) ... [2024-11-13 16:28:09,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 16:28:09,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:28:09,324 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-13 16:28:09,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-13 16:28:09,354 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-13 16:28:09,354 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-13 16:28:09,354 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-13 16:28:09,354 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-13 16:28:09,354 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-13 16:28:09,354 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-13 16:28:09,354 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-13 16:28:09,354 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-13 16:28:09,355 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-13 16:28:09,355 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-13 16:28:09,355 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-13 16:28:09,355 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-13 16:28:09,355 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-13 16:28:09,355 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-13 16:28:09,358 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-13 16:28:09,487 INFO L238 CfgBuilder]: Building ICFG [2024-11-13 16:28:09,489 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-13 16:28:09,991 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-13 16:28:09,991 INFO L287 CfgBuilder]: Performing block encoding [2024-11-13 16:28:10,298 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-13 16:28:10,298 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-13 16:28:10,298 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 04:28:10 BoogieIcfgContainer [2024-11-13 16:28:10,298 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-13 16:28:10,301 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-13 16:28:10,301 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-13 16:28:10,309 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-13 16:28:10,310 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 04:28:08" (1/3) ... [2024-11-13 16:28:10,310 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15398351 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 04:28:10, skipping insertion in model container [2024-11-13 16:28:10,310 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:28:09" (2/3) ... [2024-11-13 16:28:10,311 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15398351 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 04:28:10, skipping insertion in model container [2024-11-13 16:28:10,311 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 04:28:10" (3/3) ... [2024-11-13 16:28:10,313 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-word-symm.wvr.c [2024-11-13 16:28:10,329 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-13 16:28:10,331 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG chl-word-symm.wvr.c that has 3 procedures, 59 locations, 1 initial locations, 4 loop locations, and 22 error locations. [2024-11-13 16:28:10,331 INFO L492 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-13 16:28:10,445 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-13 16:28:10,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 65 places, 66 transitions, 146 flow [2024-11-13 16:28:10,541 INFO L124 PetriNetUnfolderBase]: 8/64 cut-off events. [2024-11-13 16:28:10,545 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-13 16:28:10,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73 conditions, 64 events. 8/64 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 174 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 47. Up to 2 conditions per place. [2024-11-13 16:28:10,551 INFO L82 GeneralOperation]: Start removeDead. Operand has 65 places, 66 transitions, 146 flow [2024-11-13 16:28:10,556 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 62 places, 63 transitions, 138 flow [2024-11-13 16:28:10,566 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-13 16:28:10,582 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;@31869fea, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-13 16:28:10,583 INFO L334 AbstractCegarLoop]: Starting to check reachability of 40 error locations. [2024-11-13 16:28:10,587 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-13 16:28:10,590 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-13 16:28:10,590 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-13 16:28:10,591 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 16:28:10,591 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-13 16:28:10,592 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-13 16:28:10,599 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:28:10,599 INFO L85 PathProgramCache]: Analyzing trace with hash 576359, now seen corresponding path program 1 times [2024-11-13 16:28:10,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:28:10,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810951996] [2024-11-13 16:28:10,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:28:10,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:28:10,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:28:10,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 16:28:10,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:28:10,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810951996] [2024-11-13 16:28:10,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810951996] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 16:28:10,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 16:28:10,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-13 16:28:10,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758342916] [2024-11-13 16:28:10,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 16:28:10,917 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 16:28:10,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:28:10,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 16:28:10,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 16:28:11,010 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 66 [2024-11-13 16:28:11,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 63 transitions, 138 flow. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:28:11,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 16:28:11,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 66 [2024-11-13 16:28:11,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 16:28:11,291 INFO L124 PetriNetUnfolderBase]: 233/554 cut-off events. [2024-11-13 16:28:11,291 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2024-11-13 16:28:11,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 941 conditions, 554 events. 233/554 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 2985 event pairs, 138 based on Foata normal form. 1/370 useless extension candidates. Maximal degree in co-relation 872. Up to 354 conditions per place. [2024-11-13 16:28:11,303 INFO L140 encePairwiseOnDemand]: 61/66 looper letters, 30 selfloop transitions, 2 changer transitions 0/59 dead transitions. [2024-11-13 16:28:11,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 59 transitions, 194 flow [2024-11-13 16:28:11,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 16:28:11,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-13 16:28:11,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 125 transitions. [2024-11-13 16:28:11,318 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6313131313131313 [2024-11-13 16:28:11,320 INFO L175 Difference]: Start difference. First operand has 62 places, 63 transitions, 138 flow. Second operand 3 states and 125 transitions. [2024-11-13 16:28:11,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 59 transitions, 194 flow [2024-11-13 16:28:11,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 59 transitions, 186 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-13 16:28:11,338 INFO L231 Difference]: Finished difference. Result has 56 places, 59 transitions, 126 flow [2024-11-13 16:28:11,341 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=126, PETRI_PLACES=56, PETRI_TRANSITIONS=59} [2024-11-13 16:28:11,345 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, -6 predicate places. [2024-11-13 16:28:11,345 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 59 transitions, 126 flow [2024-11-13 16:28:11,345 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:28:11,345 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 16:28:11,345 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-13 16:28:11,346 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-13 16:28:11,346 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-13 16:28:11,349 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:28:11,349 INFO L85 PathProgramCache]: Analyzing trace with hash 576360, now seen corresponding path program 1 times [2024-11-13 16:28:11,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:28:11,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040027255] [2024-11-13 16:28:11,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:28:11,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:28:11,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:28:11,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 16:28:11,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:28:11,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040027255] [2024-11-13 16:28:11,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040027255] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 16:28:11,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 16:28:11,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-13 16:28:11,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275239456] [2024-11-13 16:28:11,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 16:28:11,770 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 16:28:11,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:28:11,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 16:28:11,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 16:28:11,870 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 66 [2024-11-13 16:28:11,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 59 transitions, 126 flow. Second operand has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 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) [2024-11-13 16:28:11,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 16:28:11,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 66 [2024-11-13 16:28:11,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 16:28:12,075 INFO L124 PetriNetUnfolderBase]: 234/557 cut-off events. [2024-11-13 16:28:12,075 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-11-13 16:28:12,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 934 conditions, 557 events. 234/557 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3000 event pairs, 138 based on Foata normal form. 0/370 useless extension candidates. Maximal degree in co-relation 905. Up to 363 conditions per place. [2024-11-13 16:28:12,080 INFO L140 encePairwiseOnDemand]: 61/66 looper letters, 33 selfloop transitions, 4 changer transitions 0/62 dead transitions. [2024-11-13 16:28:12,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 62 transitions, 206 flow [2024-11-13 16:28:12,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 16:28:12,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-13 16:28:12,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 158 transitions. [2024-11-13 16:28:12,083 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5984848484848485 [2024-11-13 16:28:12,083 INFO L175 Difference]: Start difference. First operand has 56 places, 59 transitions, 126 flow. Second operand 4 states and 158 transitions. [2024-11-13 16:28:12,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 62 transitions, 206 flow [2024-11-13 16:28:12,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 62 transitions, 202 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-13 16:28:12,085 INFO L231 Difference]: Finished difference. Result has 59 places, 62 transitions, 149 flow [2024-11-13 16:28:12,086 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=149, PETRI_PLACES=59, PETRI_TRANSITIONS=62} [2024-11-13 16:28:12,086 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, -3 predicate places. [2024-11-13 16:28:12,087 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 62 transitions, 149 flow [2024-11-13 16:28:12,087 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 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) [2024-11-13 16:28:12,087 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 16:28:12,087 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-13 16:28:12,087 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-13 16:28:12,087 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-13 16:28:12,088 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:28:12,088 INFO L85 PathProgramCache]: Analyzing trace with hash 17868803, now seen corresponding path program 1 times [2024-11-13 16:28:12,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:28:12,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951158721] [2024-11-13 16:28:12,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:28:12,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:28:12,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:28:12,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 16:28:12,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:28:12,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951158721] [2024-11-13 16:28:12,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951158721] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 16:28:12,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 16:28:12,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 16:28:12,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340264536] [2024-11-13 16:28:12,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 16:28:12,415 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 16:28:12,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:28:12,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 16:28:12,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-13 16:28:12,594 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 66 [2024-11-13 16:28:12,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 62 transitions, 149 flow. Second operand has 5 states, 5 states have (on average 30.8) internal successors, (154), 5 states have internal predecessors, (154), 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) [2024-11-13 16:28:12,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 16:28:12,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 66 [2024-11-13 16:28:12,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 16:28:12,831 INFO L124 PetriNetUnfolderBase]: 235/560 cut-off events. [2024-11-13 16:28:12,831 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-11-13 16:28:12,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 951 conditions, 560 events. 235/560 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 3026 event pairs, 138 based on Foata normal form. 0/372 useless extension candidates. Maximal degree in co-relation 926. Up to 362 conditions per place. [2024-11-13 16:28:12,836 INFO L140 encePairwiseOnDemand]: 58/66 looper letters, 33 selfloop transitions, 7 changer transitions 0/65 dead transitions. [2024-11-13 16:28:12,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 65 transitions, 235 flow [2024-11-13 16:28:12,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 16:28:12,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-13 16:28:12,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 191 transitions. [2024-11-13 16:28:12,839 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5787878787878787 [2024-11-13 16:28:12,839 INFO L175 Difference]: Start difference. First operand has 59 places, 62 transitions, 149 flow. Second operand 5 states and 191 transitions. [2024-11-13 16:28:12,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 65 transitions, 235 flow [2024-11-13 16:28:12,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 65 transitions, 232 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-13 16:28:12,841 INFO L231 Difference]: Finished difference. Result has 64 places, 65 transitions, 183 flow [2024-11-13 16:28:12,842 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=183, PETRI_PLACES=64, PETRI_TRANSITIONS=65} [2024-11-13 16:28:12,842 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 2 predicate places. [2024-11-13 16:28:12,843 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 65 transitions, 183 flow [2024-11-13 16:28:12,843 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.8) internal successors, (154), 5 states have internal predecessors, (154), 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) [2024-11-13 16:28:12,843 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 16:28:12,843 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-13 16:28:12,843 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-13 16:28:12,844 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-13 16:28:12,844 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:28:12,844 INFO L85 PathProgramCache]: Analyzing trace with hash 553900940, now seen corresponding path program 1 times [2024-11-13 16:28:12,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:28:12,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601798807] [2024-11-13 16:28:12,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:28:12,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:28:12,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:28:13,165 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 16:28:13,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:28:13,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601798807] [2024-11-13 16:28:13,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601798807] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:28:13,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020020962] [2024-11-13 16:28:13,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:28:13,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:28:13,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:28:13,171 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:28:13,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-13 16:28:13,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:28:13,260 INFO L255 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-13 16:28:13,264 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:28:13,346 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-13 16:28:13,627 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 16:28:13,627 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:28:13,776 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 16:28:13,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020020962] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:28:13,777 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:28:13,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-13 16:28:13,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921330010] [2024-11-13 16:28:13,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:28:13,777 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-13 16:28:13,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:28:13,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-13 16:28:13,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-11-13 16:28:14,325 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 66 [2024-11-13 16:28:14,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 65 transitions, 183 flow. Second operand has 11 states, 11 states have (on average 31.363636363636363) internal successors, (345), 11 states have internal predecessors, (345), 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) [2024-11-13 16:28:14,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 16:28:14,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 66 [2024-11-13 16:28:14,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 16:28:14,777 INFO L124 PetriNetUnfolderBase]: 236/562 cut-off events. [2024-11-13 16:28:14,777 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2024-11-13 16:28:14,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 974 conditions, 562 events. 236/562 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 3043 event pairs, 138 based on Foata normal form. 0/377 useless extension candidates. Maximal degree in co-relation 936. Up to 363 conditions per place. [2024-11-13 16:28:14,781 INFO L140 encePairwiseOnDemand]: 61/66 looper letters, 32 selfloop transitions, 10 changer transitions 0/67 dead transitions. [2024-11-13 16:28:14,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 67 transitions, 278 flow [2024-11-13 16:28:14,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-13 16:28:14,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-13 16:28:14,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 281 transitions. [2024-11-13 16:28:14,787 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5321969696969697 [2024-11-13 16:28:14,787 INFO L175 Difference]: Start difference. First operand has 64 places, 65 transitions, 183 flow. Second operand 8 states and 281 transitions. [2024-11-13 16:28:14,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 67 transitions, 278 flow [2024-11-13 16:28:14,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 67 transitions, 277 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-13 16:28:14,791 INFO L231 Difference]: Finished difference. Result has 69 places, 67 transitions, 213 flow [2024-11-13 16:28:14,791 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=213, PETRI_PLACES=69, PETRI_TRANSITIONS=67} [2024-11-13 16:28:14,792 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 7 predicate places. [2024-11-13 16:28:14,793 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 67 transitions, 213 flow [2024-11-13 16:28:14,793 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 31.363636363636363) internal successors, (345), 11 states have internal predecessors, (345), 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) [2024-11-13 16:28:14,793 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 16:28:14,794 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-11-13 16:28:14,814 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-13 16:28:14,994 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:28:14,994 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-13 16:28:14,995 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:28:14,995 INFO L85 PathProgramCache]: Analyzing trace with hash -7930312, now seen corresponding path program 1 times [2024-11-13 16:28:14,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:28:14,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210491462] [2024-11-13 16:28:14,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:28:14,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:28:15,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:28:15,362 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 16:28:15,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:28:15,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210491462] [2024-11-13 16:28:15,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210491462] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:28:15,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560936147] [2024-11-13 16:28:15,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:28:15,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:28:15,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:28:15,364 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:28:15,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-13 16:28:15,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:28:15,445 INFO L255 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-13 16:28:15,447 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:28:15,474 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-13 16:28:15,708 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 16:28:15,708 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:28:16,000 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 16:28:16,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560936147] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:28:16,001 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:28:16,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-13 16:28:16,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648971462] [2024-11-13 16:28:16,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:28:16,001 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-13 16:28:16,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:28:16,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-13 16:28:16,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-11-13 16:28:16,725 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 66 [2024-11-13 16:28:16,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 67 transitions, 213 flow. Second operand has 13 states, 13 states have (on average 31.307692307692307) internal successors, (407), 13 states have internal predecessors, (407), 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) [2024-11-13 16:28:16,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 16:28:16,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 66 [2024-11-13 16:28:16,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 16:28:17,140 INFO L124 PetriNetUnfolderBase]: 236/561 cut-off events. [2024-11-13 16:28:17,141 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2024-11-13 16:28:17,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 981 conditions, 561 events. 236/561 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 3046 event pairs, 138 based on Foata normal form. 0/377 useless extension candidates. Maximal degree in co-relation 935. Up to 354 conditions per place. [2024-11-13 16:28:17,145 INFO L140 encePairwiseOnDemand]: 58/66 looper letters, 26 selfloop transitions, 15 changer transitions 0/66 dead transitions. [2024-11-13 16:28:17,145 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 66 transitions, 291 flow [2024-11-13 16:28:17,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-13 16:28:17,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-13 16:28:17,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 249 transitions. [2024-11-13 16:28:17,147 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.538961038961039 [2024-11-13 16:28:17,147 INFO L175 Difference]: Start difference. First operand has 69 places, 67 transitions, 213 flow. Second operand 7 states and 249 transitions. [2024-11-13 16:28:17,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 66 transitions, 291 flow [2024-11-13 16:28:17,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 66 transitions, 244 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-11-13 16:28:17,150 INFO L231 Difference]: Finished difference. Result has 66 places, 66 transitions, 192 flow [2024-11-13 16:28:17,150 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=192, PETRI_PLACES=66, PETRI_TRANSITIONS=66} [2024-11-13 16:28:17,150 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 4 predicate places. [2024-11-13 16:28:17,151 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 66 transitions, 192 flow [2024-11-13 16:28:17,151 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 31.307692307692307) internal successors, (407), 13 states have internal predecessors, (407), 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) [2024-11-13 16:28:17,151 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 16:28:17,151 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:28:17,172 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-13 16:28:17,356 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:28:17,357 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-13 16:28:17,357 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:28:17,358 INFO L85 PathProgramCache]: Analyzing trace with hash 1065567665, now seen corresponding path program 1 times [2024-11-13 16:28:17,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:28:17,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404216207] [2024-11-13 16:28:17,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:28:17,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:28:17,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:28:17,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 16:28:17,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:28:17,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404216207] [2024-11-13 16:28:17,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404216207] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 16:28:17,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 16:28:17,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 16:28:17,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586615393] [2024-11-13 16:28:17,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 16:28:17,455 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 16:28:17,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:28:17,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 16:28:17,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-13 16:28:17,496 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 66 [2024-11-13 16:28:17,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 66 transitions, 192 flow. Second operand has 5 states, 5 states have (on average 32.4) internal successors, (162), 5 states have internal predecessors, (162), 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) [2024-11-13 16:28:17,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 16:28:17,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 66 [2024-11-13 16:28:17,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 16:28:17,760 INFO L124 PetriNetUnfolderBase]: 436/1017 cut-off events. [2024-11-13 16:28:17,760 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2024-11-13 16:28:17,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1773 conditions, 1017 events. 436/1017 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 6237 event pairs, 234 based on Foata normal form. 0/690 useless extension candidates. Maximal degree in co-relation 1049. Up to 409 conditions per place. [2024-11-13 16:28:17,766 INFO L140 encePairwiseOnDemand]: 58/66 looper letters, 75 selfloop transitions, 7 changer transitions 0/106 dead transitions. [2024-11-13 16:28:17,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 106 transitions, 467 flow [2024-11-13 16:28:17,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 16:28:17,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-13 16:28:17,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 263 transitions. [2024-11-13 16:28:17,768 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6641414141414141 [2024-11-13 16:28:17,768 INFO L175 Difference]: Start difference. First operand has 66 places, 66 transitions, 192 flow. Second operand 6 states and 263 transitions. [2024-11-13 16:28:17,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 106 transitions, 467 flow [2024-11-13 16:28:17,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 106 transitions, 426 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-11-13 16:28:17,771 INFO L231 Difference]: Finished difference. Result has 69 places, 70 transitions, 210 flow [2024-11-13 16:28:17,771 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=210, PETRI_PLACES=69, PETRI_TRANSITIONS=70} [2024-11-13 16:28:17,772 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 7 predicate places. [2024-11-13 16:28:17,772 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 70 transitions, 210 flow [2024-11-13 16:28:17,772 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.4) internal successors, (162), 5 states have internal predecessors, (162), 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) [2024-11-13 16:28:17,772 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 16:28:17,772 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:28:17,772 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-13 16:28:17,773 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-13 16:28:17,773 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:28:17,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1819932351, now seen corresponding path program 1 times [2024-11-13 16:28:17,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:28:17,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514700410] [2024-11-13 16:28:17,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:28:17,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:28:17,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:28:17,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 16:28:17,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:28:17,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514700410] [2024-11-13 16:28:17,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514700410] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 16:28:17,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 16:28:17,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 16:28:17,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138082662] [2024-11-13 16:28:17,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 16:28:17,838 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 16:28:17,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:28:17,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 16:28:17,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 16:28:17,891 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 66 [2024-11-13 16:28:17,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 70 transitions, 210 flow. Second operand has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 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) [2024-11-13 16:28:17,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 16:28:17,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 66 [2024-11-13 16:28:17,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 16:28:18,101 INFO L124 PetriNetUnfolderBase]: 532/1174 cut-off events. [2024-11-13 16:28:18,101 INFO L125 PetriNetUnfolderBase]: For 153/153 co-relation queries the response was YES. [2024-11-13 16:28:18,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2210 conditions, 1174 events. 532/1174 cut-off events. For 153/153 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 6996 event pairs, 356 based on Foata normal form. 0/942 useless extension candidates. Maximal degree in co-relation 1320. Up to 832 conditions per place. [2024-11-13 16:28:18,111 INFO L140 encePairwiseOnDemand]: 60/66 looper letters, 44 selfloop transitions, 4 changer transitions 0/66 dead transitions. [2024-11-13 16:28:18,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 66 transitions, 298 flow [2024-11-13 16:28:18,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 16:28:18,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-13 16:28:18,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 131 transitions. [2024-11-13 16:28:18,114 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4962121212121212 [2024-11-13 16:28:18,114 INFO L175 Difference]: Start difference. First operand has 69 places, 70 transitions, 210 flow. Second operand 4 states and 131 transitions. [2024-11-13 16:28:18,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 66 transitions, 298 flow [2024-11-13 16:28:18,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 66 transitions, 293 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-13 16:28:18,118 INFO L231 Difference]: Finished difference. Result has 66 places, 66 transitions, 205 flow [2024-11-13 16:28:18,119 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=197, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=205, PETRI_PLACES=66, PETRI_TRANSITIONS=66} [2024-11-13 16:28:18,119 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 4 predicate places. [2024-11-13 16:28:18,119 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 66 transitions, 205 flow [2024-11-13 16:28:18,120 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 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) [2024-11-13 16:28:18,120 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 16:28:18,120 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:28:18,120 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-13 16:28:18,120 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-13 16:28:18,120 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:28:18,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1819932352, now seen corresponding path program 1 times [2024-11-13 16:28:18,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:28:18,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446070549] [2024-11-13 16:28:18,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:28:18,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:28:18,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:28:18,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 16:28:18,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:28:18,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446070549] [2024-11-13 16:28:18,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446070549] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 16:28:18,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 16:28:18,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 16:28:18,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546948820] [2024-11-13 16:28:18,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 16:28:18,243 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 16:28:18,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:28:18,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 16:28:18,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-13 16:28:18,287 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 66 [2024-11-13 16:28:18,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 66 transitions, 205 flow. Second operand has 5 states, 5 states have (on average 32.8) internal successors, (164), 5 states have internal predecessors, (164), 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) [2024-11-13 16:28:18,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 16:28:18,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 66 [2024-11-13 16:28:18,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 16:28:18,522 INFO L124 PetriNetUnfolderBase]: 390/782 cut-off events. [2024-11-13 16:28:18,522 INFO L125 PetriNetUnfolderBase]: For 123/123 co-relation queries the response was YES. [2024-11-13 16:28:18,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1564 conditions, 782 events. 390/782 cut-off events. For 123/123 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 3772 event pairs, 224 based on Foata normal form. 0/615 useless extension candidates. Maximal degree in co-relation 1073. Up to 407 conditions per place. [2024-11-13 16:28:18,527 INFO L140 encePairwiseOnDemand]: 58/66 looper letters, 68 selfloop transitions, 7 changer transitions 0/95 dead transitions. [2024-11-13 16:28:18,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 95 transitions, 436 flow [2024-11-13 16:28:18,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 16:28:18,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-13 16:28:18,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 256 transitions. [2024-11-13 16:28:18,529 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6464646464646465 [2024-11-13 16:28:18,529 INFO L175 Difference]: Start difference. First operand has 66 places, 66 transitions, 205 flow. Second operand 6 states and 256 transitions. [2024-11-13 16:28:18,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 95 transitions, 436 flow [2024-11-13 16:28:18,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 95 transitions, 430 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-13 16:28:18,532 INFO L231 Difference]: Finished difference. Result has 71 places, 68 transitions, 230 flow [2024-11-13 16:28:18,532 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=230, PETRI_PLACES=71, PETRI_TRANSITIONS=68} [2024-11-13 16:28:18,533 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 9 predicate places. [2024-11-13 16:28:18,533 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 68 transitions, 230 flow [2024-11-13 16:28:18,533 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.8) internal successors, (164), 5 states have internal predecessors, (164), 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) [2024-11-13 16:28:18,533 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 16:28:18,533 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:28:18,533 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-13 16:28:18,534 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-13 16:28:18,534 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:28:18,534 INFO L85 PathProgramCache]: Analyzing trace with hash 241216525, now seen corresponding path program 1 times [2024-11-13 16:28:18,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:28:18,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689424648] [2024-11-13 16:28:18,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:28:18,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:28:18,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:28:18,622 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 16:28:18,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:28:18,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689424648] [2024-11-13 16:28:18,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689424648] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 16:28:18,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 16:28:18,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-13 16:28:18,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488610814] [2024-11-13 16:28:18,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 16:28:18,623 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 16:28:18,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:28:18,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 16:28:18,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-13 16:28:18,658 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 66 [2024-11-13 16:28:18,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 68 transitions, 230 flow. Second operand has 5 states, 5 states have (on average 32.8) internal successors, (164), 5 states have internal predecessors, (164), 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) [2024-11-13 16:28:18,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 16:28:18,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 66 [2024-11-13 16:28:18,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 16:28:18,949 INFO L124 PetriNetUnfolderBase]: 688/1466 cut-off events. [2024-11-13 16:28:18,949 INFO L125 PetriNetUnfolderBase]: For 327/327 co-relation queries the response was YES. [2024-11-13 16:28:18,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3053 conditions, 1466 events. 688/1466 cut-off events. For 327/327 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 8753 event pairs, 398 based on Foata normal form. 16/1250 useless extension candidates. Maximal degree in co-relation 2077. Up to 630 conditions per place. [2024-11-13 16:28:18,958 INFO L140 encePairwiseOnDemand]: 60/66 looper letters, 77 selfloop transitions, 11 changer transitions 0/108 dead transitions. [2024-11-13 16:28:18,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 108 transitions, 527 flow [2024-11-13 16:28:18,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 16:28:18,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-13 16:28:18,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 226 transitions. [2024-11-13 16:28:18,961 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6848484848484848 [2024-11-13 16:28:18,962 INFO L175 Difference]: Start difference. First operand has 71 places, 68 transitions, 230 flow. Second operand 5 states and 226 transitions. [2024-11-13 16:28:18,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 108 transitions, 527 flow [2024-11-13 16:28:18,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 108 transitions, 519 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-13 16:28:18,968 INFO L231 Difference]: Finished difference. Result has 74 places, 72 transitions, 284 flow [2024-11-13 16:28:18,968 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=284, PETRI_PLACES=74, PETRI_TRANSITIONS=72} [2024-11-13 16:28:18,969 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 12 predicate places. [2024-11-13 16:28:18,969 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 72 transitions, 284 flow [2024-11-13 16:28:18,969 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.8) internal successors, (164), 5 states have internal predecessors, (164), 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) [2024-11-13 16:28:18,969 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 16:28:18,969 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:28:18,970 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-13 16:28:18,970 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-13 16:28:18,971 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:28:18,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1592178882, now seen corresponding path program 1 times [2024-11-13 16:28:18,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:28:18,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102023991] [2024-11-13 16:28:18,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:28:18,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:28:18,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:28:19,101 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 16:28:19,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:28:19,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102023991] [2024-11-13 16:28:19,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102023991] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 16:28:19,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 16:28:19,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 16:28:19,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958250853] [2024-11-13 16:28:19,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 16:28:19,103 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 16:28:19,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:28:19,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 16:28:19,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-13 16:28:19,178 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 66 [2024-11-13 16:28:19,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 72 transitions, 284 flow. Second operand has 5 states, 5 states have (on average 25.2) internal successors, (126), 5 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:28:19,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 16:28:19,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 66 [2024-11-13 16:28:19,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 16:28:19,443 INFO L124 PetriNetUnfolderBase]: 766/1532 cut-off events. [2024-11-13 16:28:19,444 INFO L125 PetriNetUnfolderBase]: For 835/835 co-relation queries the response was YES. [2024-11-13 16:28:19,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3464 conditions, 1532 events. 766/1532 cut-off events. For 835/835 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 8561 event pairs, 540 based on Foata normal form. 0/1402 useless extension candidates. Maximal degree in co-relation 2237. Up to 1240 conditions per place. [2024-11-13 16:28:19,456 INFO L140 encePairwiseOnDemand]: 59/66 looper letters, 47 selfloop transitions, 7 changer transitions 0/68 dead transitions. [2024-11-13 16:28:19,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 68 transitions, 384 flow [2024-11-13 16:28:19,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 16:28:19,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-13 16:28:19,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 154 transitions. [2024-11-13 16:28:19,458 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2024-11-13 16:28:19,458 INFO L175 Difference]: Start difference. First operand has 74 places, 72 transitions, 284 flow. Second operand 5 states and 154 transitions. [2024-11-13 16:28:19,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 68 transitions, 384 flow [2024-11-13 16:28:19,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 68 transitions, 379 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-13 16:28:19,463 INFO L231 Difference]: Finished difference. Result has 73 places, 68 transitions, 285 flow [2024-11-13 16:28:19,464 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=271, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=285, PETRI_PLACES=73, PETRI_TRANSITIONS=68} [2024-11-13 16:28:19,466 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 11 predicate places. [2024-11-13 16:28:19,467 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 68 transitions, 285 flow [2024-11-13 16:28:19,467 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.2) internal successors, (126), 5 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:28:19,467 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 16:28:19,467 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:28:19,467 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-13 16:28:19,468 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-13 16:28:19,468 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:28:19,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1592178883, now seen corresponding path program 1 times [2024-11-13 16:28:19,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:28:19,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107482876] [2024-11-13 16:28:19,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:28:19,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:28:19,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:28:19,760 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 16:28:19,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:28:19,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107482876] [2024-11-13 16:28:19,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107482876] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:28:19,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318889631] [2024-11-13 16:28:19,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:28:19,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:28:19,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:28:19,765 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:28:19,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-13 16:28:19,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:28:19,849 INFO L255 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-13 16:28:19,850 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:28:19,859 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 [2024-11-13 16:28:19,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 16:28:19,929 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 [2024-11-13 16:28:19,953 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-13 16:28:19,955 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 [2024-11-13 16:28:20,037 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 16:28:20,038 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:28:20,213 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 [2024-11-13 16:28:20,304 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 16:28:20,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318889631] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:28:20,304 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:28:20,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-13 16:28:20,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184499548] [2024-11-13 16:28:20,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:28:20,305 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-13 16:28:20,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:28:20,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-13 16:28:20,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-11-13 16:28:21,225 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 66 [2024-11-13 16:28:21,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 68 transitions, 285 flow. Second operand has 13 states, 13 states have (on average 28.153846153846153) internal successors, (366), 13 states have internal predecessors, (366), 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) [2024-11-13 16:28:21,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 16:28:21,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 66 [2024-11-13 16:28:21,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 16:28:21,994 INFO L124 PetriNetUnfolderBase]: 936/1764 cut-off events. [2024-11-13 16:28:21,995 INFO L125 PetriNetUnfolderBase]: For 846/846 co-relation queries the response was YES. [2024-11-13 16:28:21,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4055 conditions, 1764 events. 936/1764 cut-off events. For 846/846 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 9345 event pairs, 413 based on Foata normal form. 0/1576 useless extension candidates. Maximal degree in co-relation 2815. Up to 561 conditions per place. [2024-11-13 16:28:22,007 INFO L140 encePairwiseOnDemand]: 55/66 looper letters, 87 selfloop transitions, 18 changer transitions 0/118 dead transitions. [2024-11-13 16:28:22,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 118 transitions, 628 flow [2024-11-13 16:28:22,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-13 16:28:22,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-13 16:28:22,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 335 transitions. [2024-11-13 16:28:22,012 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.563973063973064 [2024-11-13 16:28:22,013 INFO L175 Difference]: Start difference. First operand has 73 places, 68 transitions, 285 flow. Second operand 9 states and 335 transitions. [2024-11-13 16:28:22,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 118 transitions, 628 flow [2024-11-13 16:28:22,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 118 transitions, 616 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-13 16:28:22,019 INFO L231 Difference]: Finished difference. Result has 79 places, 72 transitions, 351 flow [2024-11-13 16:28:22,019 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=351, PETRI_PLACES=79, PETRI_TRANSITIONS=72} [2024-11-13 16:28:22,021 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 17 predicate places. [2024-11-13 16:28:22,021 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 72 transitions, 351 flow [2024-11-13 16:28:22,022 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 28.153846153846153) internal successors, (366), 13 states have internal predecessors, (366), 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) [2024-11-13 16:28:22,022 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 16:28:22,022 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:28:22,041 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-13 16:28:22,222 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:28:22,223 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-13 16:28:22,223 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:28:22,223 INFO L85 PathProgramCache]: Analyzing trace with hash -107530724, now seen corresponding path program 1 times [2024-11-13 16:28:22,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:28:22,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689581837] [2024-11-13 16:28:22,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:28:22,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:28:22,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:28:22,322 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 16:28:22,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:28:22,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689581837] [2024-11-13 16:28:22,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689581837] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 16:28:22,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 16:28:22,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-13 16:28:22,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375007043] [2024-11-13 16:28:22,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 16:28:22,323 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 16:28:22,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:28:22,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 16:28:22,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-13 16:28:22,369 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 66 [2024-11-13 16:28:22,370 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 72 transitions, 351 flow. Second operand has 5 states, 5 states have (on average 33.2) internal successors, (166), 5 states have internal predecessors, (166), 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) [2024-11-13 16:28:22,370 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 16:28:22,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 66 [2024-11-13 16:28:22,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 16:28:22,688 INFO L124 PetriNetUnfolderBase]: 798/1569 cut-off events. [2024-11-13 16:28:22,688 INFO L125 PetriNetUnfolderBase]: For 1635/1637 co-relation queries the response was YES. [2024-11-13 16:28:22,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3872 conditions, 1569 events. 798/1569 cut-off events. For 1635/1637 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 8328 event pairs, 486 based on Foata normal form. 13/1434 useless extension candidates. Maximal degree in co-relation 2680. Up to 856 conditions per place. [2024-11-13 16:28:22,697 INFO L140 encePairwiseOnDemand]: 60/66 looper letters, 74 selfloop transitions, 11 changer transitions 0/101 dead transitions. [2024-11-13 16:28:22,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 101 transitions, 632 flow [2024-11-13 16:28:22,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 16:28:22,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-13 16:28:22,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 219 transitions. [2024-11-13 16:28:22,699 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6636363636363637 [2024-11-13 16:28:22,699 INFO L175 Difference]: Start difference. First operand has 79 places, 72 transitions, 351 flow. Second operand 5 states and 219 transitions. [2024-11-13 16:28:22,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 101 transitions, 632 flow [2024-11-13 16:28:22,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 101 transitions, 593 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-11-13 16:28:22,704 INFO L231 Difference]: Finished difference. Result has 80 places, 76 transitions, 378 flow [2024-11-13 16:28:22,705 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=378, PETRI_PLACES=80, PETRI_TRANSITIONS=76} [2024-11-13 16:28:22,705 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 18 predicate places. [2024-11-13 16:28:22,705 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 76 transitions, 378 flow [2024-11-13 16:28:22,705 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.2) internal successors, (166), 5 states have internal predecessors, (166), 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) [2024-11-13 16:28:22,706 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 16:28:22,706 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:28:22,706 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-13 16:28:22,706 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-13 16:28:22,706 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:28:22,706 INFO L85 PathProgramCache]: Analyzing trace with hash 2112905656, now seen corresponding path program 1 times [2024-11-13 16:28:22,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:28:22,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691804520] [2024-11-13 16:28:22,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:28:22,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:28:22,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:28:22,915 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 16:28:22,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:28:22,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691804520] [2024-11-13 16:28:22,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691804520] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:28:22,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96975835] [2024-11-13 16:28:22,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:28:22,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:28:22,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:28:22,918 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:28:22,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-13 16:28:23,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:28:23,010 INFO L255 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-13 16:28:23,011 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:28:23,104 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 16:28:23,105 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:28:23,168 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 [2024-11-13 16:28:23,177 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 16:28:23,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96975835] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:28:23,177 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:28:23,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2024-11-13 16:28:23,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089889434] [2024-11-13 16:28:23,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:28:23,179 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-13 16:28:23,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:28:23,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-13 16:28:23,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-13 16:28:23,536 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 66 [2024-11-13 16:28:23,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 76 transitions, 378 flow. Second operand has 11 states, 11 states have (on average 30.90909090909091) internal successors, (340), 11 states have internal predecessors, (340), 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) [2024-11-13 16:28:23,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 16:28:23,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 66 [2024-11-13 16:28:23,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 16:28:24,119 INFO L124 PetriNetUnfolderBase]: 837/1552 cut-off events. [2024-11-13 16:28:24,120 INFO L125 PetriNetUnfolderBase]: For 1522/1522 co-relation queries the response was YES. [2024-11-13 16:28:24,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4020 conditions, 1552 events. 837/1552 cut-off events. For 1522/1522 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 7804 event pairs, 402 based on Foata normal form. 0/1457 useless extension candidates. Maximal degree in co-relation 2851. Up to 521 conditions per place. [2024-11-13 16:28:24,130 INFO L140 encePairwiseOnDemand]: 55/66 looper letters, 88 selfloop transitions, 18 changer transitions 0/120 dead transitions. [2024-11-13 16:28:24,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 120 transitions, 712 flow [2024-11-13 16:28:24,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-13 16:28:24,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-13 16:28:24,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 296 transitions. [2024-11-13 16:28:24,132 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6406926406926406 [2024-11-13 16:28:24,132 INFO L175 Difference]: Start difference. First operand has 80 places, 76 transitions, 378 flow. Second operand 7 states and 296 transitions. [2024-11-13 16:28:24,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 120 transitions, 712 flow [2024-11-13 16:28:24,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 120 transitions, 700 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-13 16:28:24,143 INFO L231 Difference]: Finished difference. Result has 85 places, 76 transitions, 421 flow [2024-11-13 16:28:24,143 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=364, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=421, PETRI_PLACES=85, PETRI_TRANSITIONS=76} [2024-11-13 16:28:24,144 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 23 predicate places. [2024-11-13 16:28:24,145 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 76 transitions, 421 flow [2024-11-13 16:28:24,145 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 30.90909090909091) internal successors, (340), 11 states have internal predecessors, (340), 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) [2024-11-13 16:28:24,145 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 16:28:24,145 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:28:24,165 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-13 16:28:24,345 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:28:24,346 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-13 16:28:24,346 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:28:24,347 INFO L85 PathProgramCache]: Analyzing trace with hash 1087170961, now seen corresponding path program 1 times [2024-11-13 16:28:24,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:28:24,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512838989] [2024-11-13 16:28:24,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:28:24,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:28:24,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:28:24,614 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 16:28:24,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:28:24,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512838989] [2024-11-13 16:28:24,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512838989] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:28:24,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253587930] [2024-11-13 16:28:24,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:28:24,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:28:24,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:28:24,617 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:28:24,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-13 16:28:24,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:28:24,704 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-13 16:28:24,705 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:28:24,808 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 16:28:24,809 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:28:24,877 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 [2024-11-13 16:28:24,888 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 16:28:24,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253587930] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:28:24,889 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:28:24,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2024-11-13 16:28:24,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852979136] [2024-11-13 16:28:24,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:28:24,889 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-13 16:28:24,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:28:24,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-13 16:28:24,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-13 16:28:25,357 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 66 [2024-11-13 16:28:25,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 76 transitions, 421 flow. Second operand has 11 states, 11 states have (on average 30.272727272727273) internal successors, (333), 11 states have internal predecessors, (333), 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) [2024-11-13 16:28:25,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 16:28:25,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 66 [2024-11-13 16:28:25,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 16:28:25,913 INFO L124 PetriNetUnfolderBase]: 1180/2133 cut-off events. [2024-11-13 16:28:25,913 INFO L125 PetriNetUnfolderBase]: For 3826/3886 co-relation queries the response was YES. [2024-11-13 16:28:25,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5829 conditions, 2133 events. 1180/2133 cut-off events. For 3826/3886 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 11102 event pairs, 488 based on Foata normal form. 0/1997 useless extension candidates. Maximal degree in co-relation 3768. Up to 736 conditions per place. [2024-11-13 16:28:25,926 INFO L140 encePairwiseOnDemand]: 55/66 looper letters, 97 selfloop transitions, 18 changer transitions 0/128 dead transitions. [2024-11-13 16:28:25,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 128 transitions, 883 flow [2024-11-13 16:28:25,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-13 16:28:25,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-13 16:28:25,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 289 transitions. [2024-11-13 16:28:25,932 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6255411255411255 [2024-11-13 16:28:25,932 INFO L175 Difference]: Start difference. First operand has 85 places, 76 transitions, 421 flow. Second operand 7 states and 289 transitions. [2024-11-13 16:28:25,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 128 transitions, 883 flow [2024-11-13 16:28:25,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 128 transitions, 842 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-11-13 16:28:25,941 INFO L231 Difference]: Finished difference. Result has 87 places, 79 transitions, 461 flow [2024-11-13 16:28:25,942 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=388, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=461, PETRI_PLACES=87, PETRI_TRANSITIONS=79} [2024-11-13 16:28:25,943 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 25 predicate places. [2024-11-13 16:28:25,943 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 79 transitions, 461 flow [2024-11-13 16:28:25,943 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 30.272727272727273) internal successors, (333), 11 states have internal predecessors, (333), 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) [2024-11-13 16:28:25,944 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 16:28:25,944 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:28:25,963 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-13 16:28:26,144 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-13 16:28:26,145 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-13 16:28:26,145 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:28:26,145 INFO L85 PathProgramCache]: Analyzing trace with hash -657438017, now seen corresponding path program 1 times [2024-11-13 16:28:26,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:28:26,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147270611] [2024-11-13 16:28:26,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:28:26,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:28:26,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:28:26,398 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 16:28:26,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:28:26,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147270611] [2024-11-13 16:28:26,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147270611] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:28:26,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533556469] [2024-11-13 16:28:26,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:28:26,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:28:26,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:28:26,401 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:28:26,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-13 16:28:26,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:28:26,492 INFO L255 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-13 16:28:26,494 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:28:26,502 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-13 16:28:26,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 16:28:26,555 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 [2024-11-13 16:28:26,565 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-13 16:28:26,566 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 [2024-11-13 16:28:26,653 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 16:28:26,653 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:28:26,799 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 [2024-11-13 16:28:26,883 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 16:28:26,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533556469] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:28:26,883 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:28:26,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-13 16:28:26,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828991451] [2024-11-13 16:28:26,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:28:26,884 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-13 16:28:26,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:28:26,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-13 16:28:26,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-11-13 16:28:30,906 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-13 16:28:35,111 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-13 16:28:39,123 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-13 16:28:43,181 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-13 16:28:47,291 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-13 16:28:51,304 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-13 16:28:55,313 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-13 16:28:59,324 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-13 16:29:03,383 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-13 16:29:07,439 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-13 16:29:11,502 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-13 16:29:15,514 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-13 16:29:19,527 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-13 16:29:19,547 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 66 [2024-11-13 16:29:19,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 79 transitions, 461 flow. Second operand has 13 states, 13 states have (on average 17.46153846153846) internal successors, (227), 13 states have internal predecessors, (227), 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) [2024-11-13 16:29:19,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 16:29:19,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 66 [2024-11-13 16:29:19,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 16:29:20,385 INFO L124 PetriNetUnfolderBase]: 1148/2066 cut-off events. [2024-11-13 16:29:20,385 INFO L125 PetriNetUnfolderBase]: For 3743/3791 co-relation queries the response was YES. [2024-11-13 16:29:20,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5970 conditions, 2066 events. 1148/2066 cut-off events. For 3743/3791 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 10542 event pairs, 509 based on Foata normal form. 0/2018 useless extension candidates. Maximal degree in co-relation 3896. Up to 781 conditions per place. [2024-11-13 16:29:20,401 INFO L140 encePairwiseOnDemand]: 55/66 looper letters, 101 selfloop transitions, 18 changer transitions 0/132 dead transitions. [2024-11-13 16:29:20,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 132 transitions, 925 flow [2024-11-13 16:29:20,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-13 16:29:20,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-13 16:29:20,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 235 transitions. [2024-11-13 16:29:20,403 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3956228956228956 [2024-11-13 16:29:20,403 INFO L175 Difference]: Start difference. First operand has 87 places, 79 transitions, 461 flow. Second operand 9 states and 235 transitions. [2024-11-13 16:29:20,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 132 transitions, 925 flow [2024-11-13 16:29:20,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 132 transitions, 893 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-11-13 16:29:20,412 INFO L231 Difference]: Finished difference. Result has 92 places, 79 transitions, 484 flow [2024-11-13 16:29:20,413 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=427, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=484, PETRI_PLACES=92, PETRI_TRANSITIONS=79} [2024-11-13 16:29:20,413 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 30 predicate places. [2024-11-13 16:29:20,413 INFO L471 AbstractCegarLoop]: Abstraction has has 92 places, 79 transitions, 484 flow [2024-11-13 16:29:20,414 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 17.46153846153846) internal successors, (227), 13 states have internal predecessors, (227), 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) [2024-11-13 16:29:20,414 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 16:29:20,414 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:29:20,433 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-13 16:29:20,618 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:29:20,619 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-13 16:29:20,619 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:29:20,619 INFO L85 PathProgramCache]: Analyzing trace with hash -1467753399, now seen corresponding path program 1 times [2024-11-13 16:29:20,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:29:20,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322024425] [2024-11-13 16:29:20,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:29:20,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:29:20,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:29:20,758 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 16:29:20,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:29:20,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322024425] [2024-11-13 16:29:20,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322024425] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:29:20,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869924927] [2024-11-13 16:29:20,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:29:20,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:29:20,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:29:20,761 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:29:20,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-13 16:29:20,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:29:20,850 INFO L255 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-13 16:29:20,851 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:29:20,940 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 16:29:20,940 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:29:21,036 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 16:29:21,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869924927] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:29:21,038 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:29:21,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 16 [2024-11-13 16:29:21,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942106408] [2024-11-13 16:29:21,038 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:29:21,039 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-13 16:29:21,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:29:21,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-13 16:29:21,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2024-11-13 16:29:21,355 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 66 [2024-11-13 16:29:21,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 79 transitions, 484 flow. Second operand has 16 states, 16 states have (on average 33.125) internal successors, (530), 16 states have internal predecessors, (530), 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) [2024-11-13 16:29:21,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 16:29:21,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 66 [2024-11-13 16:29:21,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 16:29:22,462 INFO L124 PetriNetUnfolderBase]: 2792/5128 cut-off events. [2024-11-13 16:29:22,462 INFO L125 PetriNetUnfolderBase]: For 11852/11963 co-relation queries the response was YES. [2024-11-13 16:29:22,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15516 conditions, 5128 events. 2792/5128 cut-off events. For 11852/11963 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 33079 event pairs, 1093 based on Foata normal form. 72/5122 useless extension candidates. Maximal degree in co-relation 8028. Up to 1002 conditions per place. [2024-11-13 16:29:22,498 INFO L140 encePairwiseOnDemand]: 55/66 looper letters, 231 selfloop transitions, 48 changer transitions 0/295 dead transitions. [2024-11-13 16:29:22,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 295 transitions, 2281 flow [2024-11-13 16:29:22,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-13 16:29:22,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-11-13 16:29:22,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 931 transitions. [2024-11-13 16:29:22,502 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6133069828722003 [2024-11-13 16:29:22,502 INFO L175 Difference]: Start difference. First operand has 92 places, 79 transitions, 484 flow. Second operand 23 states and 931 transitions. [2024-11-13 16:29:22,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 295 transitions, 2281 flow [2024-11-13 16:29:22,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 295 transitions, 2192 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-11-13 16:29:22,521 INFO L231 Difference]: Finished difference. Result has 113 places, 107 transitions, 843 flow [2024-11-13 16:29:22,521 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=453, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=843, PETRI_PLACES=113, PETRI_TRANSITIONS=107} [2024-11-13 16:29:22,521 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 51 predicate places. [2024-11-13 16:29:22,522 INFO L471 AbstractCegarLoop]: Abstraction has has 113 places, 107 transitions, 843 flow [2024-11-13 16:29:22,522 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 33.125) internal successors, (530), 16 states have internal predecessors, (530), 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) [2024-11-13 16:29:22,522 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 16:29:22,522 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:29:22,540 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-13 16:29:22,722 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:29:22,723 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-13 16:29:22,724 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:29:22,724 INFO L85 PathProgramCache]: Analyzing trace with hash -862757581, now seen corresponding path program 1 times [2024-11-13 16:29:22,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:29:22,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381410002] [2024-11-13 16:29:22,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:29:22,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:29:22,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:29:22,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 16:29:22,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:29:22,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381410002] [2024-11-13 16:29:22,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381410002] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 16:29:22,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 16:29:22,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 16:29:22,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197333466] [2024-11-13 16:29:22,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 16:29:22,925 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 16:29:22,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:29:22,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 16:29:22,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 16:29:22,926 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 66 [2024-11-13 16:29:22,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 107 transitions, 843 flow. Second operand has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 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) [2024-11-13 16:29:22,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 16:29:22,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 66 [2024-11-13 16:29:22,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 16:29:23,557 INFO L124 PetriNetUnfolderBase]: 3045/5859 cut-off events. [2024-11-13 16:29:23,558 INFO L125 PetriNetUnfolderBase]: For 15824/16010 co-relation queries the response was YES. [2024-11-13 16:29:23,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17784 conditions, 5859 events. 3045/5859 cut-off events. For 15824/16010 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 42099 event pairs, 1702 based on Foata normal form. 54/5759 useless extension candidates. Maximal degree in co-relation 12853. Up to 3869 conditions per place. [2024-11-13 16:29:23,588 INFO L140 encePairwiseOnDemand]: 62/66 looper letters, 106 selfloop transitions, 1 changer transitions 9/133 dead transitions. [2024-11-13 16:29:23,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 133 transitions, 1192 flow [2024-11-13 16:29:23,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 16:29:23,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-13 16:29:23,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 182 transitions. [2024-11-13 16:29:23,590 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6893939393939394 [2024-11-13 16:29:23,590 INFO L175 Difference]: Start difference. First operand has 113 places, 107 transitions, 843 flow. Second operand 4 states and 182 transitions. [2024-11-13 16:29:23,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 133 transitions, 1192 flow [2024-11-13 16:29:23,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 133 transitions, 1155 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-11-13 16:29:23,616 INFO L231 Difference]: Finished difference. Result has 112 places, 107 transitions, 821 flow [2024-11-13 16:29:23,616 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=806, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=821, PETRI_PLACES=112, PETRI_TRANSITIONS=107} [2024-11-13 16:29:23,616 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 50 predicate places. [2024-11-13 16:29:23,616 INFO L471 AbstractCegarLoop]: Abstraction has has 112 places, 107 transitions, 821 flow [2024-11-13 16:29:23,617 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 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) [2024-11-13 16:29:23,617 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 16:29:23,617 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:29:23,617 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-13 16:29:23,617 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-13 16:29:23,617 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:29:23,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1431771125, now seen corresponding path program 2 times [2024-11-13 16:29:23,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:29:23,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247423247] [2024-11-13 16:29:23,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:29:23,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:29:23,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:29:23,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 16:29:23,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:29:23,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247423247] [2024-11-13 16:29:23,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247423247] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 16:29:23,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 16:29:23,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 16:29:23,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109065922] [2024-11-13 16:29:23,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 16:29:23,761 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 16:29:23,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:29:23,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 16:29:23,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 16:29:23,762 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 66 [2024-11-13 16:29:23,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 107 transitions, 821 flow. Second operand has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 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) [2024-11-13 16:29:23,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 16:29:23,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 66 [2024-11-13 16:29:23,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 16:29:24,517 INFO L124 PetriNetUnfolderBase]: 3285/6382 cut-off events. [2024-11-13 16:29:24,517 INFO L125 PetriNetUnfolderBase]: For 17855/18110 co-relation queries the response was YES. [2024-11-13 16:29:24,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19389 conditions, 6382 events. 3285/6382 cut-off events. For 17855/18110 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 47223 event pairs, 2166 based on Foata normal form. 45/6173 useless extension candidates. Maximal degree in co-relation 19257. Up to 4692 conditions per place. [2024-11-13 16:29:24,567 INFO L140 encePairwiseOnDemand]: 62/66 looper letters, 117 selfloop transitions, 1 changer transitions 7/142 dead transitions. [2024-11-13 16:29:24,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 142 transitions, 1328 flow [2024-11-13 16:29:24,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 16:29:24,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-13 16:29:24,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 180 transitions. [2024-11-13 16:29:24,568 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6818181818181818 [2024-11-13 16:29:24,568 INFO L175 Difference]: Start difference. First operand has 112 places, 107 transitions, 821 flow. Second operand 4 states and 180 transitions. [2024-11-13 16:29:24,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 142 transitions, 1328 flow [2024-11-13 16:29:24,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 142 transitions, 1322 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-11-13 16:29:24,681 INFO L231 Difference]: Finished difference. Result has 114 places, 107 transitions, 843 flow [2024-11-13 16:29:24,681 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=818, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=843, PETRI_PLACES=114, PETRI_TRANSITIONS=107} [2024-11-13 16:29:24,681 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 52 predicate places. [2024-11-13 16:29:24,682 INFO L471 AbstractCegarLoop]: Abstraction has has 114 places, 107 transitions, 843 flow [2024-11-13 16:29:24,682 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 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) [2024-11-13 16:29:24,682 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 16:29:24,682 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:29:24,682 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-13 16:29:24,683 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-13 16:29:24,683 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:29:24,683 INFO L85 PathProgramCache]: Analyzing trace with hash -684534984, now seen corresponding path program 1 times [2024-11-13 16:29:24,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:29:24,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318088739] [2024-11-13 16:29:24,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:29:24,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:29:24,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:29:24,812 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 16:29:24,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:29:24,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318088739] [2024-11-13 16:29:24,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318088739] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:29:24,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274491470] [2024-11-13 16:29:24,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:29:24,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:29:24,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:29:24,816 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:29:24,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-13 16:29:24,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:29:24,916 INFO L255 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-13 16:29:24,918 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:29:25,026 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 16:29:25,026 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:29:25,142 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 16:29:25,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274491470] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:29:25,142 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:29:25,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 16 [2024-11-13 16:29:25,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405402168] [2024-11-13 16:29:25,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:29:25,144 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-13 16:29:25,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:29:25,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-13 16:29:25,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2024-11-13 16:29:25,483 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 66 [2024-11-13 16:29:25,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 107 transitions, 843 flow. Second operand has 16 states, 16 states have (on average 33.375) internal successors, (534), 16 states have internal predecessors, (534), 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) [2024-11-13 16:29:25,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 16:29:25,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 66 [2024-11-13 16:29:25,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 16:29:26,590 INFO L124 PetriNetUnfolderBase]: 3043/5753 cut-off events. [2024-11-13 16:29:26,590 INFO L125 PetriNetUnfolderBase]: For 18205/18454 co-relation queries the response was YES. [2024-11-13 16:29:26,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18248 conditions, 5753 events. 3043/5753 cut-off events. For 18205/18454 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 39881 event pairs, 1735 based on Foata normal form. 72/5740 useless extension candidates. Maximal degree in co-relation 18115. Up to 1247 conditions per place. [2024-11-13 16:29:26,636 INFO L140 encePairwiseOnDemand]: 55/66 looper letters, 209 selfloop transitions, 46 changer transitions 0/271 dead transitions. [2024-11-13 16:29:26,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 271 transitions, 2279 flow [2024-11-13 16:29:26,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-13 16:29:26,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-11-13 16:29:26,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 860 transitions. [2024-11-13 16:29:26,639 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6204906204906205 [2024-11-13 16:29:26,639 INFO L175 Difference]: Start difference. First operand has 114 places, 107 transitions, 843 flow. Second operand 21 states and 860 transitions. [2024-11-13 16:29:26,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 271 transitions, 2279 flow [2024-11-13 16:29:26,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 271 transitions, 2267 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-11-13 16:29:26,679 INFO L231 Difference]: Finished difference. Result has 134 places, 125 transitions, 1138 flow [2024-11-13 16:29:26,679 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=840, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1138, PETRI_PLACES=134, PETRI_TRANSITIONS=125} [2024-11-13 16:29:26,679 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 72 predicate places. [2024-11-13 16:29:26,679 INFO L471 AbstractCegarLoop]: Abstraction has has 134 places, 125 transitions, 1138 flow [2024-11-13 16:29:26,680 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 33.375) internal successors, (534), 16 states have internal predecessors, (534), 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) [2024-11-13 16:29:26,680 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 16:29:26,680 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:29:26,700 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-13 16:29:26,880 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:29:26,881 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-13 16:29:26,881 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:29:26,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1982778608, now seen corresponding path program 1 times [2024-11-13 16:29:26,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:29:26,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262592316] [2024-11-13 16:29:26,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:29:26,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:29:26,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:29:26,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 16:29:26,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:29:26,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262592316] [2024-11-13 16:29:26,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262592316] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 16:29:26,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 16:29:26,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 16:29:26,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033804309] [2024-11-13 16:29:26,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 16:29:26,910 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 16:29:26,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:29:26,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 16:29:26,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 16:29:26,911 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 66 [2024-11-13 16:29:26,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 125 transitions, 1138 flow. Second operand has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:29:26,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 16:29:26,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 66 [2024-11-13 16:29:26,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 16:29:27,290 INFO L124 PetriNetUnfolderBase]: 2161/4301 cut-off events. [2024-11-13 16:29:27,291 INFO L125 PetriNetUnfolderBase]: For 17968/18148 co-relation queries the response was YES. [2024-11-13 16:29:27,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14644 conditions, 4301 events. 2161/4301 cut-off events. For 17968/18148 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 29335 event pairs, 818 based on Foata normal form. 209/4448 useless extension candidates. Maximal degree in co-relation 10716. Up to 3107 conditions per place. [2024-11-13 16:29:27,310 INFO L140 encePairwiseOnDemand]: 62/66 looper letters, 111 selfloop transitions, 18 changer transitions 5/151 dead transitions. [2024-11-13 16:29:27,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 151 transitions, 1664 flow [2024-11-13 16:29:27,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 16:29:27,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-13 16:29:27,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 140 transitions. [2024-11-13 16:29:27,311 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7070707070707071 [2024-11-13 16:29:27,311 INFO L175 Difference]: Start difference. First operand has 134 places, 125 transitions, 1138 flow. Second operand 3 states and 140 transitions. [2024-11-13 16:29:27,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 151 transitions, 1664 flow [2024-11-13 16:29:27,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 151 transitions, 1623 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-11-13 16:29:27,340 INFO L231 Difference]: Finished difference. Result has 131 places, 141 transitions, 1415 flow [2024-11-13 16:29:27,341 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=1097, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1415, PETRI_PLACES=131, PETRI_TRANSITIONS=141} [2024-11-13 16:29:27,341 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 69 predicate places. [2024-11-13 16:29:27,341 INFO L471 AbstractCegarLoop]: Abstraction has has 131 places, 141 transitions, 1415 flow [2024-11-13 16:29:27,341 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:29:27,341 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 16:29:27,342 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:29:27,342 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-11-13 16:29:27,342 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-13 16:29:27,342 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:29:27,342 INFO L85 PathProgramCache]: Analyzing trace with hash 1847521434, now seen corresponding path program 2 times [2024-11-13 16:29:27,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:29:27,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228311731] [2024-11-13 16:29:27,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:29:27,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:29:27,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:29:27,600 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-13 16:29:27,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:29:27,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228311731] [2024-11-13 16:29:27,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228311731] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:29:27,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107626411] [2024-11-13 16:29:27,601 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 16:29:27,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:29:27,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:29:27,603 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:29:27,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-13 16:29:27,699 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 16:29:27,699 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 16:29:27,701 INFO L255 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-13 16:29:27,703 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:29:27,714 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 [2024-11-13 16:29:27,800 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-13 16:29:27,801 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 [2024-11-13 16:29:27,809 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 [2024-11-13 16:29:27,962 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-13 16:29:27,962 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:29:28,147 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 [2024-11-13 16:29:28,287 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-13 16:29:28,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107626411] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:29:28,287 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:29:28,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 19 [2024-11-13 16:29:28,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198627517] [2024-11-13 16:29:28,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:29:28,288 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-13 16:29:28,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:29:28,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-13 16:29:28,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2024-11-13 16:29:29,652 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 66 [2024-11-13 16:29:29,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 141 transitions, 1415 flow. Second operand has 21 states, 21 states have (on average 28.142857142857142) internal successors, (591), 21 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:29:29,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 16:29:29,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 66 [2024-11-13 16:29:29,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 16:29:31,079 INFO L124 PetriNetUnfolderBase]: 2719/5083 cut-off events. [2024-11-13 16:29:31,079 INFO L125 PetriNetUnfolderBase]: For 23508/23679 co-relation queries the response was YES. [2024-11-13 16:29:31,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17925 conditions, 5083 events. 2719/5083 cut-off events. For 23508/23679 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 32837 event pairs, 1162 based on Foata normal form. 24/5067 useless extension candidates. Maximal degree in co-relation 13672. Up to 1675 conditions per place. [2024-11-13 16:29:31,109 INFO L140 encePairwiseOnDemand]: 56/66 looper letters, 188 selfloop transitions, 42 changer transitions 0/243 dead transitions. [2024-11-13 16:29:31,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 243 transitions, 2514 flow [2024-11-13 16:29:31,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-13 16:29:31,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-13 16:29:31,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 478 transitions. [2024-11-13 16:29:31,111 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5571095571095571 [2024-11-13 16:29:31,111 INFO L175 Difference]: Start difference. First operand has 131 places, 141 transitions, 1415 flow. Second operand 13 states and 478 transitions. [2024-11-13 16:29:31,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 243 transitions, 2514 flow [2024-11-13 16:29:31,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 243 transitions, 2426 flow, removed 44 selfloop flow, removed 2 redundant places. [2024-11-13 16:29:31,147 INFO L231 Difference]: Finished difference. Result has 143 places, 149 transitions, 1564 flow [2024-11-13 16:29:31,147 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=1343, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1564, PETRI_PLACES=143, PETRI_TRANSITIONS=149} [2024-11-13 16:29:31,147 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 81 predicate places. [2024-11-13 16:29:31,148 INFO L471 AbstractCegarLoop]: Abstraction has has 143 places, 149 transitions, 1564 flow [2024-11-13 16:29:31,148 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 28.142857142857142) internal successors, (591), 21 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:29:31,148 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 16:29:31,148 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:29:31,168 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-13 16:29:31,352 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:29:31,353 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-13 16:29:31,353 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:29:31,353 INFO L85 PathProgramCache]: Analyzing trace with hash -326426452, now seen corresponding path program 1 times [2024-11-13 16:29:31,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:29:31,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148330727] [2024-11-13 16:29:31,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:29:31,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:29:31,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:29:31,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 16:29:31,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:29:31,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148330727] [2024-11-13 16:29:31,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148330727] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 16:29:31,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 16:29:31,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-13 16:29:31,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981519080] [2024-11-13 16:29:31,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 16:29:31,687 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-13 16:29:31,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:29:31,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-13 16:29:31,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-11-13 16:29:31,739 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 66 [2024-11-13 16:29:31,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 149 transitions, 1564 flow. Second operand has 8 states, 8 states have (on average 34.5) internal successors, (276), 8 states have internal predecessors, (276), 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) [2024-11-13 16:29:31,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 16:29:31,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 66 [2024-11-13 16:29:31,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 16:29:32,577 INFO L124 PetriNetUnfolderBase]: 2421/4551 cut-off events. [2024-11-13 16:29:32,577 INFO L125 PetriNetUnfolderBase]: For 27025/27241 co-relation queries the response was YES. [2024-11-13 16:29:32,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17327 conditions, 4551 events. 2421/4551 cut-off events. For 27025/27241 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 29943 event pairs, 829 based on Foata normal form. 1/4472 useless extension candidates. Maximal degree in co-relation 13803. Up to 2233 conditions per place. [2024-11-13 16:29:32,606 INFO L140 encePairwiseOnDemand]: 55/66 looper letters, 155 selfloop transitions, 31 changer transitions 27/232 dead transitions. [2024-11-13 16:29:32,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 232 transitions, 2761 flow [2024-11-13 16:29:32,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-13 16:29:32,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-13 16:29:32,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 302 transitions. [2024-11-13 16:29:32,607 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6536796536796536 [2024-11-13 16:29:32,607 INFO L175 Difference]: Start difference. First operand has 143 places, 149 transitions, 1564 flow. Second operand 7 states and 302 transitions. [2024-11-13 16:29:32,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 232 transitions, 2761 flow [2024-11-13 16:29:32,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 232 transitions, 2712 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-11-13 16:29:32,651 INFO L231 Difference]: Finished difference. Result has 145 places, 169 transitions, 1897 flow [2024-11-13 16:29:32,652 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=1515, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1897, PETRI_PLACES=145, PETRI_TRANSITIONS=169} [2024-11-13 16:29:32,652 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 83 predicate places. [2024-11-13 16:29:32,652 INFO L471 AbstractCegarLoop]: Abstraction has has 145 places, 169 transitions, 1897 flow [2024-11-13 16:29:32,653 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 34.5) internal successors, (276), 8 states have internal predecessors, (276), 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) [2024-11-13 16:29:32,653 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 16:29:32,653 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:29:32,653 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-11-13 16:29:32,653 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-13 16:29:32,654 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:29:32,654 INFO L85 PathProgramCache]: Analyzing trace with hash 1438590145, now seen corresponding path program 1 times [2024-11-13 16:29:32,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:29:32,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503377507] [2024-11-13 16:29:32,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:29:32,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:29:32,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:29:32,873 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-13 16:29:32,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:29:32,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503377507] [2024-11-13 16:29:32,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503377507] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:29:32,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179741996] [2024-11-13 16:29:32,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:29:32,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:29:32,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:29:32,876 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:29:32,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-13 16:29:32,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:29:32,973 INFO L255 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-13 16:29:32,974 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:29:33,128 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-13 16:29:33,129 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:29:33,249 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 [2024-11-13 16:29:33,308 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-13 16:29:33,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179741996] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:29:33,309 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:29:33,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2024-11-13 16:29:33,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966601140] [2024-11-13 16:29:33,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:29:33,310 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-13 16:29:33,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:29:33,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-13 16:29:33,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2024-11-13 16:29:34,146 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 66 [2024-11-13 16:29:34,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 169 transitions, 1897 flow. Second operand has 20 states, 20 states have (on average 30.95) internal successors, (619), 20 states have internal predecessors, (619), 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) [2024-11-13 16:29:34,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 16:29:34,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 66 [2024-11-13 16:29:34,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 16:29:35,040 INFO L124 PetriNetUnfolderBase]: 2606/4894 cut-off events. [2024-11-13 16:29:35,040 INFO L125 PetriNetUnfolderBase]: For 30103/30226 co-relation queries the response was YES. [2024-11-13 16:29:35,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20068 conditions, 4894 events. 2606/4894 cut-off events. For 30103/30226 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 31982 event pairs, 1099 based on Foata normal form. 26/4859 useless extension candidates. Maximal degree in co-relation 20005. Up to 1546 conditions per place. [2024-11-13 16:29:35,069 INFO L140 encePairwiseOnDemand]: 56/66 looper letters, 221 selfloop transitions, 47 changer transitions 0/284 dead transitions. [2024-11-13 16:29:35,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 284 transitions, 3285 flow [2024-11-13 16:29:35,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-13 16:29:35,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-13 16:29:35,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 417 transitions. [2024-11-13 16:29:35,070 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6318181818181818 [2024-11-13 16:29:35,070 INFO L175 Difference]: Start difference. First operand has 145 places, 169 transitions, 1897 flow. Second operand 10 states and 417 transitions. [2024-11-13 16:29:35,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 284 transitions, 3285 flow [2024-11-13 16:29:35,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 284 transitions, 3187 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-11-13 16:29:35,108 INFO L231 Difference]: Finished difference. Result has 151 places, 172 transitions, 2009 flow [2024-11-13 16:29:35,108 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=1828, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2009, PETRI_PLACES=151, PETRI_TRANSITIONS=172} [2024-11-13 16:29:35,109 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 89 predicate places. [2024-11-13 16:29:35,109 INFO L471 AbstractCegarLoop]: Abstraction has has 151 places, 172 transitions, 2009 flow [2024-11-13 16:29:35,109 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 30.95) internal successors, (619), 20 states have internal predecessors, (619), 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) [2024-11-13 16:29:35,109 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 16:29:35,109 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:29:35,123 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-13 16:29:35,310 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-11-13 16:29:35,310 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-13 16:29:35,310 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:29:35,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1571154103, now seen corresponding path program 2 times [2024-11-13 16:29:35,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:29:35,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799498558] [2024-11-13 16:29:35,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:29:35,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:29:35,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:29:35,577 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-13 16:29:35,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:29:35,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799498558] [2024-11-13 16:29:35,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799498558] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:29:35,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187249686] [2024-11-13 16:29:35,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 16:29:35,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:29:35,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:29:35,580 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:29:35,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-13 16:29:35,679 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 16:29:35,679 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 16:29:35,681 INFO L255 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-13 16:29:35,682 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:29:35,887 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-13 16:29:35,887 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:29:36,167 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 35 treesize of output 31 [2024-11-13 16:29:36,239 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-13 16:29:36,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187249686] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:29:36,240 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:29:36,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2024-11-13 16:29:36,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985616160] [2024-11-13 16:29:36,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:29:36,241 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-13 16:29:36,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:29:36,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-13 16:29:36,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2024-11-13 16:29:37,486 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 66 [2024-11-13 16:29:37,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 172 transitions, 2009 flow. Second operand has 20 states, 20 states have (on average 29.45) internal successors, (589), 20 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:29:37,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 16:29:37,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 66 [2024-11-13 16:29:37,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 16:29:39,372 INFO L124 PetriNetUnfolderBase]: 3146/5425 cut-off events. [2024-11-13 16:29:39,372 INFO L125 PetriNetUnfolderBase]: For 46861/47205 co-relation queries the response was YES. [2024-11-13 16:29:39,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23238 conditions, 5425 events. 3146/5425 cut-off events. For 46861/47205 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 33662 event pairs, 712 based on Foata normal form. 33/5410 useless extension candidates. Maximal degree in co-relation 19766. Up to 1103 conditions per place. [2024-11-13 16:29:39,408 INFO L140 encePairwiseOnDemand]: 55/66 looper letters, 266 selfloop transitions, 75 changer transitions 0/357 dead transitions. [2024-11-13 16:29:39,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 357 transitions, 4527 flow [2024-11-13 16:29:39,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-13 16:29:39,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-11-13 16:29:39,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 737 transitions. [2024-11-13 16:29:39,411 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5317460317460317 [2024-11-13 16:29:39,411 INFO L175 Difference]: Start difference. First operand has 151 places, 172 transitions, 2009 flow. Second operand 21 states and 737 transitions. [2024-11-13 16:29:39,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 357 transitions, 4527 flow [2024-11-13 16:29:39,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 357 transitions, 4445 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-11-13 16:29:39,536 INFO L231 Difference]: Finished difference. Result has 167 places, 177 transitions, 2196 flow [2024-11-13 16:29:39,536 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=1943, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2196, PETRI_PLACES=167, PETRI_TRANSITIONS=177} [2024-11-13 16:29:39,540 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 105 predicate places. [2024-11-13 16:29:39,540 INFO L471 AbstractCegarLoop]: Abstraction has has 167 places, 177 transitions, 2196 flow [2024-11-13 16:29:39,541 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 29.45) internal successors, (589), 20 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:29:39,541 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 16:29:39,541 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:29:39,562 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-13 16:29:39,741 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-11-13 16:29:39,741 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-13 16:29:39,742 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:29:39,742 INFO L85 PathProgramCache]: Analyzing trace with hash -1660986601, now seen corresponding path program 1 times [2024-11-13 16:29:39,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:29:39,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921046912] [2024-11-13 16:29:39,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:29:39,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:29:39,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:29:39,984 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 16:29:39,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:29:39,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921046912] [2024-11-13 16:29:39,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921046912] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:29:39,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703109036] [2024-11-13 16:29:39,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:29:39,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:29:39,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:29:39,987 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:29:39,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-13 16:29:40,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:29:40,089 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-13 16:29:40,091 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:29:40,429 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 16:29:40,430 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:29:41,105 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 16:29:41,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703109036] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-13 16:29:41,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-13 16:29:41,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 8] total 23 [2024-11-13 16:29:41,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740942689] [2024-11-13 16:29:41,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 16:29:41,106 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-13 16:29:41,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:29:41,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-13 16:29:41,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2024-11-13 16:29:41,193 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 66 [2024-11-13 16:29:41,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 177 transitions, 2196 flow. Second operand has 9 states, 9 states have (on average 34.44444444444444) internal successors, (310), 9 states have internal predecessors, (310), 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) [2024-11-13 16:29:41,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 16:29:41,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 66 [2024-11-13 16:29:41,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 16:29:42,434 INFO L124 PetriNetUnfolderBase]: 2652/4942 cut-off events. [2024-11-13 16:29:42,434 INFO L125 PetriNetUnfolderBase]: For 41693/41931 co-relation queries the response was YES. [2024-11-13 16:29:42,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21344 conditions, 4942 events. 2652/4942 cut-off events. For 41693/41931 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 33253 event pairs, 804 based on Foata normal form. 22/4884 useless extension candidates. Maximal degree in co-relation 18408. Up to 2146 conditions per place. [2024-11-13 16:29:42,468 INFO L140 encePairwiseOnDemand]: 53/66 looper letters, 197 selfloop transitions, 63 changer transitions 12/294 dead transitions. [2024-11-13 16:29:42,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 294 transitions, 3723 flow [2024-11-13 16:29:42,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-13 16:29:42,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-13 16:29:42,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 572 transitions. [2024-11-13 16:29:42,470 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-11-13 16:29:42,470 INFO L175 Difference]: Start difference. First operand has 167 places, 177 transitions, 2196 flow. Second operand 14 states and 572 transitions. [2024-11-13 16:29:42,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 294 transitions, 3723 flow [2024-11-13 16:29:42,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 294 transitions, 3551 flow, removed 25 selfloop flow, removed 13 redundant places. [2024-11-13 16:29:42,513 INFO L231 Difference]: Finished difference. Result has 174 places, 190 transitions, 2345 flow [2024-11-13 16:29:42,514 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=2059, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2345, PETRI_PLACES=174, PETRI_TRANSITIONS=190} [2024-11-13 16:29:42,514 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 112 predicate places. [2024-11-13 16:29:42,514 INFO L471 AbstractCegarLoop]: Abstraction has has 174 places, 190 transitions, 2345 flow [2024-11-13 16:29:42,514 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 34.44444444444444) internal successors, (310), 9 states have internal predecessors, (310), 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) [2024-11-13 16:29:42,514 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 16:29:42,514 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:29:42,532 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-13 16:29:42,715 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-11-13 16:29:42,715 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-13 16:29:42,715 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:29:42,715 INFO L85 PathProgramCache]: Analyzing trace with hash -1461136377, now seen corresponding path program 1 times [2024-11-13 16:29:42,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:29:42,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103285527] [2024-11-13 16:29:42,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:29:42,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:29:42,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:29:42,937 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-13 16:29:42,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:29:42,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103285527] [2024-11-13 16:29:42,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103285527] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:29:42,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944245254] [2024-11-13 16:29:42,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:29:42,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:29:42,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:29:42,940 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:29:42,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-13 16:29:43,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:29:43,044 INFO L255 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-13 16:29:43,045 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:29:43,055 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 [2024-11-13 16:29:43,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 16:29:43,133 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 [2024-11-13 16:29:43,144 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-13 16:29:43,144 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 [2024-11-13 16:29:43,249 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-13 16:29:43,249 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:29:43,426 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 [2024-11-13 16:29:43,557 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-13 16:29:43,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944245254] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:29:43,557 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:29:43,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2024-11-13 16:29:43,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748687735] [2024-11-13 16:29:43,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:29:43,558 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-13 16:29:43,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:29:43,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-13 16:29:43,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2024-11-13 16:29:44,675 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 66 [2024-11-13 16:29:44,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 190 transitions, 2345 flow. Second operand has 20 states, 20 states have (on average 29.55) internal successors, (591), 20 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:29:44,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 16:29:44,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 66 [2024-11-13 16:29:44,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 16:29:46,037 INFO L124 PetriNetUnfolderBase]: 3102/5724 cut-off events. [2024-11-13 16:29:46,037 INFO L125 PetriNetUnfolderBase]: For 49861/50191 co-relation queries the response was YES. [2024-11-13 16:29:46,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25215 conditions, 5724 events. 3102/5724 cut-off events. For 49861/50191 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 37667 event pairs, 1241 based on Foata normal form. 33/5714 useless extension candidates. Maximal degree in co-relation 25126. Up to 1832 conditions per place. [2024-11-13 16:29:46,069 INFO L140 encePairwiseOnDemand]: 56/66 looper letters, 251 selfloop transitions, 48 changer transitions 0/318 dead transitions. [2024-11-13 16:29:46,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 318 transitions, 4328 flow [2024-11-13 16:29:46,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-13 16:29:46,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-13 16:29:46,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 483 transitions. [2024-11-13 16:29:46,070 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5629370629370629 [2024-11-13 16:29:46,070 INFO L175 Difference]: Start difference. First operand has 174 places, 190 transitions, 2345 flow. Second operand 13 states and 483 transitions. [2024-11-13 16:29:46,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 318 transitions, 4328 flow [2024-11-13 16:29:46,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 318 transitions, 4196 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-11-13 16:29:46,116 INFO L231 Difference]: Finished difference. Result has 184 places, 195 transitions, 2466 flow [2024-11-13 16:29:46,116 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=2267, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2466, PETRI_PLACES=184, PETRI_TRANSITIONS=195} [2024-11-13 16:29:46,117 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 122 predicate places. [2024-11-13 16:29:46,117 INFO L471 AbstractCegarLoop]: Abstraction has has 184 places, 195 transitions, 2466 flow [2024-11-13 16:29:46,117 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 29.55) internal successors, (591), 20 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:29:46,117 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 16:29:46,117 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:29:46,135 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-13 16:29:46,318 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-13 16:29:46,318 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-13 16:29:46,318 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:29:46,318 INFO L85 PathProgramCache]: Analyzing trace with hash 825545337, now seen corresponding path program 2 times [2024-11-13 16:29:46,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:29:46,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757807552] [2024-11-13 16:29:46,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:29:46,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:29:46,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:29:46,535 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 16:29:46,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:29:46,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757807552] [2024-11-13 16:29:46,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757807552] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:29:46,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151991159] [2024-11-13 16:29:46,535 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 16:29:46,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:29:46,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:29:46,537 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:29:46,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-13 16:29:46,630 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-13 16:29:46,630 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 16:29:46,631 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-13 16:29:46,633 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:29:46,933 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 16:29:46,933 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 16:29:46,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151991159] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 16:29:46,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-13 16:29:46,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 15 [2024-11-13 16:29:46,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356183916] [2024-11-13 16:29:46,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 16:29:46,934 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-13 16:29:46,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:29:46,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-13 16:29:46,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2024-11-13 16:29:46,966 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 66 [2024-11-13 16:29:46,967 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 195 transitions, 2466 flow. Second operand has 8 states, 8 states have (on average 34.75) internal successors, (278), 8 states have internal predecessors, (278), 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) [2024-11-13 16:29:46,967 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 16:29:46,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 66 [2024-11-13 16:29:46,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 16:29:47,986 INFO L124 PetriNetUnfolderBase]: 2777/5196 cut-off events. [2024-11-13 16:29:47,986 INFO L125 PetriNetUnfolderBase]: For 45139/45439 co-relation queries the response was YES. [2024-11-13 16:29:48,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23209 conditions, 5196 events. 2777/5196 cut-off events. For 45139/45439 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 34493 event pairs, 879 based on Foata normal form. 26/5136 useless extension candidates. Maximal degree in co-relation 22280. Up to 2671 conditions per place. [2024-11-13 16:29:48,017 INFO L140 encePairwiseOnDemand]: 55/66 looper letters, 192 selfloop transitions, 39 changer transitions 14/269 dead transitions. [2024-11-13 16:29:48,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 269 transitions, 3716 flow [2024-11-13 16:29:48,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-13 16:29:48,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-13 16:29:48,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 377 transitions. [2024-11-13 16:29:48,019 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6346801346801347 [2024-11-13 16:29:48,019 INFO L175 Difference]: Start difference. First operand has 184 places, 195 transitions, 2466 flow. Second operand 9 states and 377 transitions. [2024-11-13 16:29:48,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 269 transitions, 3716 flow [2024-11-13 16:29:48,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 269 transitions, 3683 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-11-13 16:29:48,064 INFO L231 Difference]: Finished difference. Result has 190 places, 197 transitions, 2570 flow [2024-11-13 16:29:48,064 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=2433, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2570, PETRI_PLACES=190, PETRI_TRANSITIONS=197} [2024-11-13 16:29:48,065 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 128 predicate places. [2024-11-13 16:29:48,065 INFO L471 AbstractCegarLoop]: Abstraction has has 190 places, 197 transitions, 2570 flow [2024-11-13 16:29:48,065 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 34.75) internal successors, (278), 8 states have internal predecessors, (278), 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) [2024-11-13 16:29:48,065 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 16:29:48,065 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:29:48,077 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-13 16:29:48,265 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-13 16:29:48,266 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-13 16:29:48,266 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:29:48,266 INFO L85 PathProgramCache]: Analyzing trace with hash -173610933, now seen corresponding path program 3 times [2024-11-13 16:29:48,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:29:48,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808843736] [2024-11-13 16:29:48,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:29:48,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:29:48,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:29:48,491 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 16:29:48,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:29:48,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808843736] [2024-11-13 16:29:48,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808843736] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:29:48,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639841571] [2024-11-13 16:29:48,492 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 16:29:48,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:29:48,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:29:48,494 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:29:48,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-13 16:29:48,589 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-11-13 16:29:48,589 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 16:29:48,590 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-13 16:29:48,591 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:29:48,889 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 16:29:48,889 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 16:29:48,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639841571] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 16:29:48,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-13 16:29:48,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 15 [2024-11-13 16:29:48,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624785717] [2024-11-13 16:29:48,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 16:29:48,890 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-13 16:29:48,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:29:48,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-13 16:29:48,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2024-11-13 16:29:48,923 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 66 [2024-11-13 16:29:48,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 197 transitions, 2570 flow. Second operand has 8 states, 8 states have (on average 34.75) internal successors, (278), 8 states have internal predecessors, (278), 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) [2024-11-13 16:29:48,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 16:29:48,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 66 [2024-11-13 16:29:48,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 16:29:49,916 INFO L124 PetriNetUnfolderBase]: 2725/5088 cut-off events. [2024-11-13 16:29:49,917 INFO L125 PetriNetUnfolderBase]: For 47908/48208 co-relation queries the response was YES. [2024-11-13 16:29:49,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24164 conditions, 5088 events. 2725/5088 cut-off events. For 47908/48208 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 33496 event pairs, 865 based on Foata normal form. 26/5028 useless extension candidates. Maximal degree in co-relation 23950. Up to 2577 conditions per place. [2024-11-13 16:29:49,982 INFO L140 encePairwiseOnDemand]: 55/66 looper letters, 181 selfloop transitions, 36 changer transitions 25/266 dead transitions. [2024-11-13 16:29:49,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 266 transitions, 3744 flow [2024-11-13 16:29:49,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-13 16:29:49,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-13 16:29:49,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 378 transitions. [2024-11-13 16:29:49,984 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6363636363636364 [2024-11-13 16:29:49,984 INFO L175 Difference]: Start difference. First operand has 190 places, 197 transitions, 2570 flow. Second operand 9 states and 378 transitions. [2024-11-13 16:29:49,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 266 transitions, 3744 flow [2024-11-13 16:29:50,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 266 transitions, 3648 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-11-13 16:29:50,069 INFO L231 Difference]: Finished difference. Result has 192 places, 192 transitions, 2494 flow [2024-11-13 16:29:50,069 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=2474, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2494, PETRI_PLACES=192, PETRI_TRANSITIONS=192} [2024-11-13 16:29:50,073 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 130 predicate places. [2024-11-13 16:29:50,073 INFO L471 AbstractCegarLoop]: Abstraction has has 192 places, 192 transitions, 2494 flow [2024-11-13 16:29:50,074 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 34.75) internal successors, (278), 8 states have internal predecessors, (278), 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) [2024-11-13 16:29:50,074 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 16:29:50,074 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:29:50,094 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-13 16:29:50,274 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-13 16:29:50,275 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-13 16:29:50,275 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:29:50,275 INFO L85 PathProgramCache]: Analyzing trace with hash -673886413, now seen corresponding path program 4 times [2024-11-13 16:29:50,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:29:50,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122279650] [2024-11-13 16:29:50,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:29:50,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:29:50,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:29:50,486 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 16:29:50,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:29:50,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122279650] [2024-11-13 16:29:50,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122279650] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:29:50,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119949053] [2024-11-13 16:29:50,486 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 16:29:50,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:29:50,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:29:50,489 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:29:50,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-13 16:29:50,589 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 16:29:50,589 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 16:29:50,590 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-13 16:29:50,591 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:29:50,923 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 16:29:50,923 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:29:51,395 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 16:29:51,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119949053] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-13 16:29:51,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-13 16:29:51,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [9, 10] total 27 [2024-11-13 16:29:51,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466770739] [2024-11-13 16:29:51,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 16:29:51,395 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-13 16:29:51,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:29:51,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-13 16:29:51,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2024-11-13 16:29:51,501 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 66 [2024-11-13 16:29:51,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 192 transitions, 2494 flow. Second operand has 10 states, 10 states have (on average 33.2) internal successors, (332), 10 states have internal predecessors, (332), 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) [2024-11-13 16:29:51,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 16:29:51,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 66 [2024-11-13 16:29:51,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 16:29:52,980 INFO L124 PetriNetUnfolderBase]: 3698/7008 cut-off events. [2024-11-13 16:29:52,981 INFO L125 PetriNetUnfolderBase]: For 60557/60894 co-relation queries the response was YES. [2024-11-13 16:29:53,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31684 conditions, 7008 events. 3698/7008 cut-off events. For 60557/60894 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 49792 event pairs, 390 based on Foata normal form. 6/6906 useless extension candidates. Maximal degree in co-relation 31151. Up to 1346 conditions per place. [2024-11-13 16:29:53,022 INFO L140 encePairwiseOnDemand]: 51/66 looper letters, 292 selfloop transitions, 118 changer transitions 26/459 dead transitions. [2024-11-13 16:29:53,022 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 459 transitions, 6438 flow [2024-11-13 16:29:53,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-13 16:29:53,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-13 16:29:53,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 632 transitions. [2024-11-13 16:29:53,024 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6383838383838384 [2024-11-13 16:29:53,024 INFO L175 Difference]: Start difference. First operand has 192 places, 192 transitions, 2494 flow. Second operand 15 states and 632 transitions. [2024-11-13 16:29:53,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 459 transitions, 6438 flow [2024-11-13 16:29:53,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 459 transitions, 6230 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-11-13 16:29:53,087 INFO L231 Difference]: Finished difference. Result has 204 places, 241 transitions, 3532 flow [2024-11-13 16:29:53,088 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=2390, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=3532, PETRI_PLACES=204, PETRI_TRANSITIONS=241} [2024-11-13 16:29:53,088 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 142 predicate places. [2024-11-13 16:29:53,088 INFO L471 AbstractCegarLoop]: Abstraction has has 204 places, 241 transitions, 3532 flow [2024-11-13 16:29:53,089 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 33.2) internal successors, (332), 10 states have internal predecessors, (332), 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) [2024-11-13 16:29:53,089 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 16:29:53,089 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:29:53,102 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-13 16:29:53,289 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-13 16:29:53,289 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-13 16:29:53,289 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:29:53,290 INFO L85 PathProgramCache]: Analyzing trace with hash -1260547765, now seen corresponding path program 5 times [2024-11-13 16:29:53,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:29:53,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659768281] [2024-11-13 16:29:53,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:29:53,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:29:53,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:29:53,509 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 16:29:53,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:29:53,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659768281] [2024-11-13 16:29:53,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659768281] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:29:53,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68237355] [2024-11-13 16:29:53,509 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-13 16:29:53,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:29:53,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:29:53,512 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:29:53,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-13 16:29:53,599 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 16:29:53,599 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 16:29:53,601 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-13 16:29:53,602 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:29:53,880 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 16:29:53,880 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:29:54,570 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 16:29:54,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68237355] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-13 16:29:54,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-13 16:29:54,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 8] total 23 [2024-11-13 16:29:54,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953560560] [2024-11-13 16:29:54,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 16:29:54,570 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-13 16:29:54,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:29:54,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-13 16:29:54,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2024-11-13 16:29:54,644 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 66 [2024-11-13 16:29:54,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 241 transitions, 3532 flow. Second operand has 9 states, 9 states have (on average 34.44444444444444) internal successors, (310), 9 states have internal predecessors, (310), 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) [2024-11-13 16:29:54,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 16:29:54,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 66 [2024-11-13 16:29:54,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 16:29:55,962 INFO L124 PetriNetUnfolderBase]: 3329/6403 cut-off events. [2024-11-13 16:29:55,962 INFO L125 PetriNetUnfolderBase]: For 68815/69307 co-relation queries the response was YES. [2024-11-13 16:29:56,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30981 conditions, 6403 events. 3329/6403 cut-off events. For 68815/69307 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 45909 event pairs, 984 based on Foata normal form. 78/6347 useless extension candidates. Maximal degree in co-relation 30863. Up to 3715 conditions per place. [2024-11-13 16:29:56,016 INFO L140 encePairwiseOnDemand]: 53/66 looper letters, 157 selfloop transitions, 83 changer transitions 30/296 dead transitions. [2024-11-13 16:29:56,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 296 transitions, 4497 flow [2024-11-13 16:29:56,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-13 16:29:56,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-13 16:29:56,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 508 transitions. [2024-11-13 16:29:56,017 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5920745920745921 [2024-11-13 16:29:56,018 INFO L175 Difference]: Start difference. First operand has 204 places, 241 transitions, 3532 flow. Second operand 13 states and 508 transitions. [2024-11-13 16:29:56,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 296 transitions, 4497 flow [2024-11-13 16:29:56,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 296 transitions, 4337 flow, removed 32 selfloop flow, removed 10 redundant places. [2024-11-13 16:29:56,140 INFO L231 Difference]: Finished difference. Result has 206 places, 228 transitions, 3336 flow [2024-11-13 16:29:56,140 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=3382, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3336, PETRI_PLACES=206, PETRI_TRANSITIONS=228} [2024-11-13 16:29:56,141 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 144 predicate places. [2024-11-13 16:29:56,141 INFO L471 AbstractCegarLoop]: Abstraction has has 206 places, 228 transitions, 3336 flow [2024-11-13 16:29:56,141 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 34.44444444444444) internal successors, (310), 9 states have internal predecessors, (310), 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) [2024-11-13 16:29:56,141 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 16:29:56,141 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:29:56,153 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-13 16:29:56,341 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:29:56,342 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-13 16:29:56,342 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:29:56,342 INFO L85 PathProgramCache]: Analyzing trace with hash -1777021726, now seen corresponding path program 1 times [2024-11-13 16:29:56,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:29:56,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898337441] [2024-11-13 16:29:56,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:29:56,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:29:56,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:29:56,580 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 16:29:56,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:29:56,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898337441] [2024-11-13 16:29:56,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898337441] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:29:56,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859366129] [2024-11-13 16:29:56,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:29:56,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:29:56,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:29:56,582 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:29:56,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-13 16:29:56,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:29:56,675 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-13 16:29:56,676 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:29:56,971 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 16:29:56,971 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:29:57,702 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 16:29:57,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859366129] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-13 16:29:57,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-13 16:29:57,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 9] total 26 [2024-11-13 16:29:57,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562252089] [2024-11-13 16:29:57,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 16:29:57,703 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-13 16:29:57,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:29:57,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-13 16:29:57,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=564, Unknown=0, NotChecked=0, Total=702 [2024-11-13 16:29:57,776 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 66 [2024-11-13 16:29:57,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 228 transitions, 3336 flow. Second operand has 10 states, 10 states have (on average 34.2) internal successors, (342), 10 states have internal predecessors, (342), 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) [2024-11-13 16:29:57,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 16:29:57,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 66 [2024-11-13 16:29:57,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 16:29:59,109 INFO L124 PetriNetUnfolderBase]: 3409/6575 cut-off events. [2024-11-13 16:29:59,109 INFO L125 PetriNetUnfolderBase]: For 66252/66718 co-relation queries the response was YES. [2024-11-13 16:29:59,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31066 conditions, 6575 events. 3409/6575 cut-off events. For 66252/66718 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 47727 event pairs, 956 based on Foata normal form. 58/6492 useless extension candidates. Maximal degree in co-relation 30936. Up to 3590 conditions per place. [2024-11-13 16:29:59,159 INFO L140 encePairwiseOnDemand]: 52/66 looper letters, 196 selfloop transitions, 93 changer transitions 12/327 dead transitions. [2024-11-13 16:29:59,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 327 transitions, 4757 flow [2024-11-13 16:29:59,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-13 16:29:59,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-13 16:29:59,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 536 transitions. [2024-11-13 16:29:59,160 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6247086247086248 [2024-11-13 16:29:59,161 INFO L175 Difference]: Start difference. First operand has 206 places, 228 transitions, 3336 flow. Second operand 13 states and 536 transitions. [2024-11-13 16:29:59,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 327 transitions, 4757 flow [2024-11-13 16:29:59,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 327 transitions, 4538 flow, removed 18 selfloop flow, removed 12 redundant places. [2024-11-13 16:29:59,268 INFO L231 Difference]: Finished difference. Result has 207 places, 237 transitions, 3467 flow [2024-11-13 16:29:59,268 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=3139, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3467, PETRI_PLACES=207, PETRI_TRANSITIONS=237} [2024-11-13 16:29:59,268 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 145 predicate places. [2024-11-13 16:29:59,268 INFO L471 AbstractCegarLoop]: Abstraction has has 207 places, 237 transitions, 3467 flow [2024-11-13 16:29:59,268 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 34.2) internal successors, (342), 10 states have internal predecessors, (342), 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) [2024-11-13 16:29:59,268 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 16:29:59,268 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:29:59,281 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-13 16:29:59,469 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2024-11-13 16:29:59,469 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-13 16:29:59,469 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:29:59,469 INFO L85 PathProgramCache]: Analyzing trace with hash -2051055512, now seen corresponding path program 2 times [2024-11-13 16:29:59,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:29:59,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211596759] [2024-11-13 16:29:59,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:29:59,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:29:59,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:29:59,735 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 16:29:59,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:29:59,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211596759] [2024-11-13 16:29:59,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211596759] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:29:59,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436678526] [2024-11-13 16:29:59,736 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 16:29:59,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:29:59,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:29:59,738 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:29:59,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-13 16:29:59,821 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-13 16:29:59,821 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 16:29:59,822 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-13 16:29:59,823 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:30:00,129 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 16:30:00,129 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 16:30:00,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436678526] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 16:30:00,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-13 16:30:00,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 17 [2024-11-13 16:30:00,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816983094] [2024-11-13 16:30:00,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 16:30:00,130 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-13 16:30:00,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:30:00,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-13 16:30:00,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2024-11-13 16:30:00,153 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 66 [2024-11-13 16:30:00,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 237 transitions, 3467 flow. Second operand has 9 states, 9 states have (on average 34.44444444444444) internal successors, (310), 9 states have internal predecessors, (310), 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) [2024-11-13 16:30:00,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 16:30:00,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 66 [2024-11-13 16:30:00,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 16:30:01,054 INFO L124 PetriNetUnfolderBase]: 3367/6507 cut-off events. [2024-11-13 16:30:01,054 INFO L125 PetriNetUnfolderBase]: For 65383/65839 co-relation queries the response was YES. [2024-11-13 16:30:01,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30910 conditions, 6507 events. 3367/6507 cut-off events. For 65383/65839 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 47373 event pairs, 998 based on Foata normal form. 58/6419 useless extension candidates. Maximal degree in co-relation 30777. Up to 3933 conditions per place. [2024-11-13 16:30:01,103 INFO L140 encePairwiseOnDemand]: 55/66 looper letters, 184 selfloop transitions, 72 changer transitions 15/297 dead transitions. [2024-11-13 16:30:01,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 297 transitions, 4578 flow [2024-11-13 16:30:01,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-13 16:30:01,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-13 16:30:01,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 373 transitions. [2024-11-13 16:30:01,104 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6279461279461279 [2024-11-13 16:30:01,104 INFO L175 Difference]: Start difference. First operand has 207 places, 237 transitions, 3467 flow. Second operand 9 states and 373 transitions. [2024-11-13 16:30:01,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 297 transitions, 4578 flow [2024-11-13 16:30:01,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 297 transitions, 4471 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-11-13 16:30:01,222 INFO L231 Difference]: Finished difference. Result has 211 places, 239 transitions, 3552 flow [2024-11-13 16:30:01,222 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=3370, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3552, PETRI_PLACES=211, PETRI_TRANSITIONS=239} [2024-11-13 16:30:01,223 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 149 predicate places. [2024-11-13 16:30:01,223 INFO L471 AbstractCegarLoop]: Abstraction has has 211 places, 239 transitions, 3552 flow [2024-11-13 16:30:01,223 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 34.44444444444444) internal successors, (310), 9 states have internal predecessors, (310), 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) [2024-11-13 16:30:01,223 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 16:30:01,223 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:30:01,236 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-13 16:30:01,424 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:30:01,424 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-13 16:30:01,424 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:30:01,424 INFO L85 PathProgramCache]: Analyzing trace with hash -813728508, now seen corresponding path program 3 times [2024-11-13 16:30:01,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:30:01,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459632185] [2024-11-13 16:30:01,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:30:01,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:30:01,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:30:01,654 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 16:30:01,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:30:01,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459632185] [2024-11-13 16:30:01,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459632185] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:30:01,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503213510] [2024-11-13 16:30:01,654 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 16:30:01,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:30:01,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:30:01,658 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:30:01,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-13 16:30:01,760 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-11-13 16:30:01,760 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 16:30:01,762 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-13 16:30:01,763 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:30:02,068 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 16:30:02,068 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 16:30:02,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503213510] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 16:30:02,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-13 16:30:02,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 17 [2024-11-13 16:30:02,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909705608] [2024-11-13 16:30:02,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 16:30:02,069 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-13 16:30:02,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:30:02,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-13 16:30:02,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2024-11-13 16:30:02,107 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 66 [2024-11-13 16:30:02,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 239 transitions, 3552 flow. Second operand has 9 states, 9 states have (on average 34.44444444444444) internal successors, (310), 9 states have internal predecessors, (310), 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) [2024-11-13 16:30:02,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 16:30:02,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 66 [2024-11-13 16:30:02,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 16:30:03,036 INFO L124 PetriNetUnfolderBase]: 3315/6399 cut-off events. [2024-11-13 16:30:03,036 INFO L125 PetriNetUnfolderBase]: For 68286/68742 co-relation queries the response was YES. [2024-11-13 16:30:03,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31023 conditions, 6399 events. 3315/6399 cut-off events. For 68286/68742 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 46483 event pairs, 985 based on Foata normal form. 58/6311 useless extension candidates. Maximal degree in co-relation 30898. Up to 3839 conditions per place. [2024-11-13 16:30:03,088 INFO L140 encePairwiseOnDemand]: 55/66 looper letters, 173 selfloop transitions, 69 changer transitions 26/294 dead transitions. [2024-11-13 16:30:03,088 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 294 transitions, 4570 flow [2024-11-13 16:30:03,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-13 16:30:03,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-13 16:30:03,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 374 transitions. [2024-11-13 16:30:03,089 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6296296296296297 [2024-11-13 16:30:03,089 INFO L175 Difference]: Start difference. First operand has 211 places, 239 transitions, 3552 flow. Second operand 9 states and 374 transitions. [2024-11-13 16:30:03,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 294 transitions, 4570 flow [2024-11-13 16:30:03,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 294 transitions, 4430 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-11-13 16:30:03,209 INFO L231 Difference]: Finished difference. Result has 213 places, 234 transitions, 3469 flow [2024-11-13 16:30:03,210 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=3412, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3469, PETRI_PLACES=213, PETRI_TRANSITIONS=234} [2024-11-13 16:30:03,210 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 151 predicate places. [2024-11-13 16:30:03,210 INFO L471 AbstractCegarLoop]: Abstraction has has 213 places, 234 transitions, 3469 flow [2024-11-13 16:30:03,210 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 34.44444444444444) internal successors, (310), 9 states have internal predecessors, (310), 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) [2024-11-13 16:30:03,210 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 16:30:03,210 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:30:03,224 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-11-13 16:30:03,410 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2024-11-13 16:30:03,411 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-13 16:30:03,411 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:30:03,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1314003988, now seen corresponding path program 4 times [2024-11-13 16:30:03,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:30:03,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800285077] [2024-11-13 16:30:03,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:30:03,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:30:03,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:30:03,632 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 16:30:03,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:30:03,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800285077] [2024-11-13 16:30:03,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800285077] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:30:03,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410170130] [2024-11-13 16:30:03,633 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 16:30:03,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:30:03,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:30:03,634 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:30:03,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-13 16:30:03,720 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 16:30:03,720 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 16:30:03,721 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-13 16:30:03,722 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:30:04,000 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 16:30:04,000 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:30:04,381 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 16:30:04,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410170130] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-13 16:30:04,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-13 16:30:04,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 9] total 26 [2024-11-13 16:30:04,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195294154] [2024-11-13 16:30:04,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 16:30:04,382 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-13 16:30:04,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:30:04,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-13 16:30:04,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=564, Unknown=0, NotChecked=0, Total=702 [2024-11-13 16:30:04,434 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 66 [2024-11-13 16:30:04,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 234 transitions, 3469 flow. Second operand has 10 states, 10 states have (on average 34.2) internal successors, (342), 10 states have internal predecessors, (342), 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) [2024-11-13 16:30:04,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 16:30:04,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 66 [2024-11-13 16:30:04,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 16:30:05,577 INFO L124 PetriNetUnfolderBase]: 3227/6221 cut-off events. [2024-11-13 16:30:05,578 INFO L125 PetriNetUnfolderBase]: For 66824/67290 co-relation queries the response was YES. [2024-11-13 16:30:05,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30193 conditions, 6221 events. 3227/6221 cut-off events. For 66824/67290 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 44782 event pairs, 944 based on Foata normal form. 58/6138 useless extension candidates. Maximal degree in co-relation 30077. Up to 3590 conditions per place. [2024-11-13 16:30:05,615 INFO L140 encePairwiseOnDemand]: 52/66 looper letters, 156 selfloop transitions, 87 changer transitions 21/290 dead transitions. [2024-11-13 16:30:05,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 290 transitions, 4354 flow [2024-11-13 16:30:05,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-13 16:30:05,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-13 16:30:05,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 480 transitions. [2024-11-13 16:30:05,617 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6060606060606061 [2024-11-13 16:30:05,617 INFO L175 Difference]: Start difference. First operand has 213 places, 234 transitions, 3469 flow. Second operand 12 states and 480 transitions. [2024-11-13 16:30:05,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 290 transitions, 4354 flow [2024-11-13 16:30:05,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 290 transitions, 4207 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-11-13 16:30:05,718 INFO L231 Difference]: Finished difference. Result has 213 places, 228 transitions, 3418 flow [2024-11-13 16:30:05,718 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=3324, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3418, PETRI_PLACES=213, PETRI_TRANSITIONS=228} [2024-11-13 16:30:05,719 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 151 predicate places. [2024-11-13 16:30:05,719 INFO L471 AbstractCegarLoop]: Abstraction has has 213 places, 228 transitions, 3418 flow [2024-11-13 16:30:05,719 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 34.2) internal successors, (342), 10 states have internal predecessors, (342), 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) [2024-11-13 16:30:05,719 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 16:30:05,719 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:30:05,732 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-13 16:30:05,919 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:30:05,919 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-13 16:30:05,920 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:30:05,920 INFO L85 PathProgramCache]: Analyzing trace with hash -1957646496, now seen corresponding path program 5 times [2024-11-13 16:30:05,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:30:05,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297040086] [2024-11-13 16:30:05,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:30:05,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:30:05,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:30:06,141 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 16:30:06,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:30:06,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297040086] [2024-11-13 16:30:06,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297040086] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:30:06,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424287791] [2024-11-13 16:30:06,141 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-13 16:30:06,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:30:06,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:30:06,143 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:30:06,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-13 16:30:06,228 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 16:30:06,229 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 16:30:06,230 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-13 16:30:06,231 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:30:06,522 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 16:30:06,522 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:30:07,207 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 16:30:07,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424287791] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-13 16:30:07,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-13 16:30:07,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 9] total 26 [2024-11-13 16:30:07,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22900784] [2024-11-13 16:30:07,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 16:30:07,208 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-13 16:30:07,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:30:07,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-13 16:30:07,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=564, Unknown=0, NotChecked=0, Total=702 [2024-11-13 16:30:07,285 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 66 [2024-11-13 16:30:07,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 228 transitions, 3418 flow. Second operand has 10 states, 10 states have (on average 34.2) internal successors, (342), 10 states have internal predecessors, (342), 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) [2024-11-13 16:30:07,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 16:30:07,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 66 [2024-11-13 16:30:07,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 16:30:08,685 INFO L124 PetriNetUnfolderBase]: 3199/6109 cut-off events. [2024-11-13 16:30:08,685 INFO L125 PetriNetUnfolderBase]: For 66587/67073 co-relation queries the response was YES. [2024-11-13 16:30:08,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29805 conditions, 6109 events. 3199/6109 cut-off events. For 66587/67073 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 44060 event pairs, 930 based on Foata normal form. 70/6042 useless extension candidates. Maximal degree in co-relation 29690. Up to 3608 conditions per place. [2024-11-13 16:30:08,740 INFO L140 encePairwiseOnDemand]: 52/66 looper letters, 145 selfloop transitions, 83 changer transitions 26/280 dead transitions. [2024-11-13 16:30:08,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 280 transitions, 4305 flow [2024-11-13 16:30:08,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-13 16:30:08,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-13 16:30:08,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 472 transitions. [2024-11-13 16:30:08,741 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5959595959595959 [2024-11-13 16:30:08,741 INFO L175 Difference]: Start difference. First operand has 213 places, 228 transitions, 3418 flow. Second operand 12 states and 472 transitions. [2024-11-13 16:30:08,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 280 transitions, 4305 flow [2024-11-13 16:30:08,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 280 transitions, 4227 flow, removed 11 selfloop flow, removed 11 redundant places. [2024-11-13 16:30:08,858 INFO L231 Difference]: Finished difference. Result has 212 places, 221 transitions, 3423 flow [2024-11-13 16:30:08,859 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=3350, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3423, PETRI_PLACES=212, PETRI_TRANSITIONS=221} [2024-11-13 16:30:08,859 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 150 predicate places. [2024-11-13 16:30:08,859 INFO L471 AbstractCegarLoop]: Abstraction has has 212 places, 221 transitions, 3423 flow [2024-11-13 16:30:08,859 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 34.2) internal successors, (342), 10 states have internal predecessors, (342), 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) [2024-11-13 16:30:08,859 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 16:30:08,859 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:30:08,872 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-13 16:30:09,059 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:30:09,060 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-13 16:30:09,060 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:30:09,060 INFO L85 PathProgramCache]: Analyzing trace with hash 251208393, now seen corresponding path program 6 times [2024-11-13 16:30:09,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:30:09,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125477371] [2024-11-13 16:30:09,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:30:09,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:30:09,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:30:09,265 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 16:30:09,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:30:09,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125477371] [2024-11-13 16:30:09,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125477371] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:30:09,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381871458] [2024-11-13 16:30:09,266 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-13 16:30:09,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:30:09,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:30:09,268 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:30:09,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-13 16:30:09,369 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2024-11-13 16:30:09,369 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 16:30:09,371 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-13 16:30:09,372 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:30:09,636 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 16:30:09,636 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 16:30:09,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381871458] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 16:30:09,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-13 16:30:09,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 15 [2024-11-13 16:30:09,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230091266] [2024-11-13 16:30:09,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 16:30:09,636 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-13 16:30:09,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:30:09,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-13 16:30:09,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2024-11-13 16:30:09,670 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 66 [2024-11-13 16:30:09,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 221 transitions, 3423 flow. Second operand has 8 states, 8 states have (on average 34.75) internal successors, (278), 8 states have internal predecessors, (278), 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) [2024-11-13 16:30:09,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 16:30:09,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 66 [2024-11-13 16:30:09,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 16:30:10,530 INFO L124 PetriNetUnfolderBase]: 3093/5953 cut-off events. [2024-11-13 16:30:10,530 INFO L125 PetriNetUnfolderBase]: For 68455/68923 co-relation queries the response was YES. [2024-11-13 16:30:10,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29364 conditions, 5953 events. 3093/5953 cut-off events. For 68455/68923 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 42827 event pairs, 935 based on Foata normal form. 70/5886 useless extension candidates. Maximal degree in co-relation 29259. Up to 3591 conditions per place. [2024-11-13 16:30:10,584 INFO L140 encePairwiseOnDemand]: 55/66 looper letters, 140 selfloop transitions, 54 changer transitions 34/254 dead transitions. [2024-11-13 16:30:10,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 254 transitions, 4098 flow [2024-11-13 16:30:10,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-13 16:30:10,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-13 16:30:10,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 365 transitions. [2024-11-13 16:30:10,586 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6144781144781145 [2024-11-13 16:30:10,586 INFO L175 Difference]: Start difference. First operand has 212 places, 221 transitions, 3423 flow. Second operand 9 states and 365 transitions. [2024-11-13 16:30:10,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 254 transitions, 4098 flow [2024-11-13 16:30:10,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 254 transitions, 3973 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-11-13 16:30:10,703 INFO L231 Difference]: Finished difference. Result has 207 places, 202 transitions, 3189 flow [2024-11-13 16:30:10,703 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=3298, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3189, PETRI_PLACES=207, PETRI_TRANSITIONS=202} [2024-11-13 16:30:10,704 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 145 predicate places. [2024-11-13 16:30:10,704 INFO L471 AbstractCegarLoop]: Abstraction has has 207 places, 202 transitions, 3189 flow [2024-11-13 16:30:10,704 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 34.75) internal successors, (278), 8 states have internal predecessors, (278), 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) [2024-11-13 16:30:10,704 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 16:30:10,705 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:30:10,726 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-11-13 16:30:10,909 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:30:10,910 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-13 16:30:10,910 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:30:10,910 INFO L85 PathProgramCache]: Analyzing trace with hash -388909182, now seen corresponding path program 6 times [2024-11-13 16:30:10,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:30:10,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522583784] [2024-11-13 16:30:10,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:30:10,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:30:10,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:30:11,116 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 16:30:11,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:30:11,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522583784] [2024-11-13 16:30:11,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522583784] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:30:11,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791483580] [2024-11-13 16:30:11,117 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-13 16:30:11,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:30:11,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:30:11,119 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:30:11,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-13 16:30:11,210 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2024-11-13 16:30:11,210 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 16:30:11,211 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-13 16:30:11,212 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:30:11,458 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 16:30:11,458 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 16:30:11,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791483580] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 16:30:11,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-13 16:30:11,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 17 [2024-11-13 16:30:11,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956499912] [2024-11-13 16:30:11,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 16:30:11,459 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-13 16:30:11,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:30:11,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-13 16:30:11,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2024-11-13 16:30:11,490 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 66 [2024-11-13 16:30:11,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 202 transitions, 3189 flow. Second operand has 9 states, 9 states have (on average 34.44444444444444) internal successors, (310), 9 states have internal predecessors, (310), 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) [2024-11-13 16:30:11,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 16:30:11,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 66 [2024-11-13 16:30:11,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 16:30:12,269 INFO L124 PetriNetUnfolderBase]: 3058/5792 cut-off events. [2024-11-13 16:30:12,269 INFO L125 PetriNetUnfolderBase]: For 68081/68569 co-relation queries the response was YES. [2024-11-13 16:30:12,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29848 conditions, 5792 events. 3058/5792 cut-off events. For 68081/68569 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 41419 event pairs, 902 based on Foata normal form. 58/5709 useless extension candidates. Maximal degree in co-relation 29688. Up to 3507 conditions per place. [2024-11-13 16:30:12,309 INFO L140 encePairwiseOnDemand]: 55/66 looper letters, 127 selfloop transitions, 55 changer transitions 28/236 dead transitions. [2024-11-13 16:30:12,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 236 transitions, 3830 flow [2024-11-13 16:30:12,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-13 16:30:12,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-13 16:30:12,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 361 transitions. [2024-11-13 16:30:12,310 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6077441077441077 [2024-11-13 16:30:12,310 INFO L175 Difference]: Start difference. First operand has 207 places, 202 transitions, 3189 flow. Second operand 9 states and 361 transitions. [2024-11-13 16:30:12,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 236 transitions, 3830 flow [2024-11-13 16:30:12,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 236 transitions, 3456 flow, removed 41 selfloop flow, removed 17 redundant places. [2024-11-13 16:30:12,425 INFO L231 Difference]: Finished difference. Result has 183 places, 190 transitions, 2774 flow [2024-11-13 16:30:12,425 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=2825, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2774, PETRI_PLACES=183, PETRI_TRANSITIONS=190} [2024-11-13 16:30:12,425 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 121 predicate places. [2024-11-13 16:30:12,425 INFO L471 AbstractCegarLoop]: Abstraction has has 183 places, 190 transitions, 2774 flow [2024-11-13 16:30:12,426 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 34.44444444444444) internal successors, (310), 9 states have internal predecessors, (310), 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) [2024-11-13 16:30:12,426 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 16:30:12,426 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:30:12,438 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-11-13 16:30:12,626 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:30:12,626 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-13 16:30:12,626 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:30:12,626 INFO L85 PathProgramCache]: Analyzing trace with hash 1855869088, now seen corresponding path program 3 times [2024-11-13 16:30:12,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:30:12,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668188] [2024-11-13 16:30:12,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:30:12,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:30:12,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:30:12,745 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-13 16:30:12,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:30:12,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668188] [2024-11-13 16:30:12,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668188] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:30:12,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336370091] [2024-11-13 16:30:12,745 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 16:30:12,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:30:12,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:30:12,748 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:30:12,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-13 16:30:12,851 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-13 16:30:12,851 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 16:30:12,852 INFO L255 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-13 16:30:12,855 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:30:12,864 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 [2024-11-13 16:30:12,919 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-13 16:30:12,919 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 18 treesize of output 17 [2024-11-13 16:30:12,935 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-13 16:30:12,935 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 [2024-11-13 16:30:13,048 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-13 16:30:13,048 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:30:13,262 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 42 treesize of output 38 [2024-11-13 16:30:13,311 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-13 16:30:13,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336370091] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:30:13,312 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:30:13,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 21 [2024-11-13 16:30:13,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006972763] [2024-11-13 16:30:13,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:30:13,312 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-13 16:30:13,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:30:13,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-13 16:30:13,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2024-11-13 16:30:14,631 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 66 [2024-11-13 16:30:14,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 190 transitions, 2774 flow. Second operand has 22 states, 22 states have (on average 26.545454545454547) internal successors, (584), 22 states have internal predecessors, (584), 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) [2024-11-13 16:30:14,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 16:30:14,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 66 [2024-11-13 16:30:14,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 16:30:17,090 INFO L124 PetriNetUnfolderBase]: 6790/12213 cut-off events. [2024-11-13 16:30:17,090 INFO L125 PetriNetUnfolderBase]: For 112532/112552 co-relation queries the response was YES. [2024-11-13 16:30:17,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59755 conditions, 12213 events. 6790/12213 cut-off events. For 112532/112552 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 88664 event pairs, 2308 based on Foata normal form. 80/12265 useless extension candidates. Maximal degree in co-relation 59640. Up to 2993 conditions per place. [2024-11-13 16:30:17,166 INFO L140 encePairwiseOnDemand]: 54/66 looper letters, 429 selfloop transitions, 100 changer transitions 0/542 dead transitions. [2024-11-13 16:30:17,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 542 transitions, 8407 flow [2024-11-13 16:30:17,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-13 16:30:17,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-11-13 16:30:17,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 673 transitions. [2024-11-13 16:30:17,168 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5098484848484849 [2024-11-13 16:30:17,168 INFO L175 Difference]: Start difference. First operand has 183 places, 190 transitions, 2774 flow. Second operand 20 states and 673 transitions. [2024-11-13 16:30:17,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 542 transitions, 8407 flow [2024-11-13 16:30:17,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 542 transitions, 7863 flow, removed 77 selfloop flow, removed 9 redundant places. [2024-11-13 16:30:17,396 INFO L231 Difference]: Finished difference. Result has 181 places, 227 transitions, 3452 flow [2024-11-13 16:30:17,396 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=2552, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=3452, PETRI_PLACES=181, PETRI_TRANSITIONS=227} [2024-11-13 16:30:17,397 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 119 predicate places. [2024-11-13 16:30:17,397 INFO L471 AbstractCegarLoop]: Abstraction has has 181 places, 227 transitions, 3452 flow [2024-11-13 16:30:17,397 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 26.545454545454547) internal successors, (584), 22 states have internal predecessors, (584), 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) [2024-11-13 16:30:17,397 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 16:30:17,397 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:30:17,415 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-11-13 16:30:17,597 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:30:17,598 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-13 16:30:17,598 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:30:17,598 INFO L85 PathProgramCache]: Analyzing trace with hash 1950153403, now seen corresponding path program 1 times [2024-11-13 16:30:17,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:30:17,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721680854] [2024-11-13 16:30:17,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:30:17,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:30:17,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:30:17,695 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 16:30:17,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:30:17,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721680854] [2024-11-13 16:30:17,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721680854] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:30:17,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742990163] [2024-11-13 16:30:17,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:30:17,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:30:17,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:30:17,697 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:30:17,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-13 16:30:17,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:30:17,788 INFO L255 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-13 16:30:17,788 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:30:17,870 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 16:30:17,870 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:30:17,953 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 16:30:17,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742990163] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-13 16:30:17,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-13 16:30:17,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 6] total 14 [2024-11-13 16:30:17,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316760676] [2024-11-13 16:30:17,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 16:30:17,954 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-13 16:30:17,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:30:17,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-13 16:30:17,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2024-11-13 16:30:18,006 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 66 [2024-11-13 16:30:18,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 227 transitions, 3452 flow. Second operand has 7 states, 7 states have (on average 34.42857142857143) internal successors, (241), 7 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:30:18,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 16:30:18,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 66 [2024-11-13 16:30:18,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 16:30:19,361 INFO L124 PetriNetUnfolderBase]: 4865/9807 cut-off events. [2024-11-13 16:30:19,361 INFO L125 PetriNetUnfolderBase]: For 91225/91827 co-relation queries the response was YES. [2024-11-13 16:30:19,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45580 conditions, 9807 events. 4865/9807 cut-off events. For 91225/91827 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 78958 event pairs, 1794 based on Foata normal form. 276/10020 useless extension candidates. Maximal degree in co-relation 41697. Up to 4456 conditions per place. [2024-11-13 16:30:19,441 INFO L140 encePairwiseOnDemand]: 57/66 looper letters, 232 selfloop transitions, 30 changer transitions 0/287 dead transitions. [2024-11-13 16:30:19,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 287 transitions, 5014 flow [2024-11-13 16:30:19,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-13 16:30:19,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-13 16:30:19,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 263 transitions. [2024-11-13 16:30:19,442 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5692640692640693 [2024-11-13 16:30:19,442 INFO L175 Difference]: Start difference. First operand has 181 places, 227 transitions, 3452 flow. Second operand 7 states and 263 transitions. [2024-11-13 16:30:19,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 287 transitions, 5014 flow [2024-11-13 16:30:19,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 287 transitions, 4822 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-11-13 16:30:19,666 INFO L231 Difference]: Finished difference. Result has 182 places, 209 transitions, 3011 flow [2024-11-13 16:30:19,666 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=2888, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3011, PETRI_PLACES=182, PETRI_TRANSITIONS=209} [2024-11-13 16:30:19,666 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 120 predicate places. [2024-11-13 16:30:19,667 INFO L471 AbstractCegarLoop]: Abstraction has has 182 places, 209 transitions, 3011 flow [2024-11-13 16:30:19,667 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 34.42857142857143) internal successors, (241), 7 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:30:19,668 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 16:30:19,668 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:30:19,680 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-11-13 16:30:19,868 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:30:19,868 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-13 16:30:19,868 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:30:19,869 INFO L85 PathProgramCache]: Analyzing trace with hash -1580582080, now seen corresponding path program 2 times [2024-11-13 16:30:19,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:30:19,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973281505] [2024-11-13 16:30:19,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:30:19,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:30:19,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:30:19,962 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-13 16:30:19,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:30:19,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973281505] [2024-11-13 16:30:19,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973281505] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:30:19,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132676690] [2024-11-13 16:30:19,962 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 16:30:19,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:30:19,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:30:19,964 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:30:19,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-13 16:30:20,051 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-13 16:30:20,051 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 16:30:20,052 INFO L255 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-13 16:30:20,054 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:30:20,068 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 [2024-11-13 16:30:20,073 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 [2024-11-13 16:30:20,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 16:30:20,157 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-13 16:30:20,170 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-13 16:30:20,170 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 [2024-11-13 16:30:20,533 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-13 16:30:20,533 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:30:21,149 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-13 16:30:21,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132676690] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:30:21,150 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:30:21,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 19 [2024-11-13 16:30:21,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683217891] [2024-11-13 16:30:21,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:30:21,150 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-13 16:30:21,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:30:21,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-13 16:30:21,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2024-11-13 16:30:22,639 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 66 [2024-11-13 16:30:22,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 209 transitions, 3011 flow. Second operand has 19 states, 19 states have (on average 27.31578947368421) internal successors, (519), 19 states have internal predecessors, (519), 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) [2024-11-13 16:30:22,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 16:30:22,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 66 [2024-11-13 16:30:22,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 16:30:26,240 INFO L124 PetriNetUnfolderBase]: 10479/17847 cut-off events. [2024-11-13 16:30:26,240 INFO L125 PetriNetUnfolderBase]: For 196127/197728 co-relation queries the response was YES. [2024-11-13 16:30:26,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90510 conditions, 17847 events. 10479/17847 cut-off events. For 196127/197728 co-relation queries the response was YES. Maximal size of possible extension queue 607. Compared 135116 event pairs, 2220 based on Foata normal form. 384/18183 useless extension candidates. Maximal degree in co-relation 76531. Up to 3862 conditions per place. [2024-11-13 16:30:26,360 INFO L140 encePairwiseOnDemand]: 56/66 looper letters, 570 selfloop transitions, 82 changer transitions 0/669 dead transitions. [2024-11-13 16:30:26,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 669 transitions, 11818 flow [2024-11-13 16:30:26,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-13 16:30:26,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-13 16:30:26,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 571 transitions. [2024-11-13 16:30:26,609 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5089126559714795 [2024-11-13 16:30:26,609 INFO L175 Difference]: Start difference. First operand has 182 places, 209 transitions, 3011 flow. Second operand 17 states and 571 transitions. [2024-11-13 16:30:26,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 669 transitions, 11818 flow [2024-11-13 16:30:26,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 669 transitions, 11706 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-11-13 16:30:26,895 INFO L231 Difference]: Finished difference. Result has 195 places, 243 transitions, 3760 flow [2024-11-13 16:30:26,895 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=2930, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=3760, PETRI_PLACES=195, PETRI_TRANSITIONS=243} [2024-11-13 16:30:26,896 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 133 predicate places. [2024-11-13 16:30:26,896 INFO L471 AbstractCegarLoop]: Abstraction has has 195 places, 243 transitions, 3760 flow [2024-11-13 16:30:26,896 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 27.31578947368421) internal successors, (519), 19 states have internal predecessors, (519), 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) [2024-11-13 16:30:26,896 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 16:30:26,896 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:30:26,912 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-11-13 16:30:27,097 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:30:27,097 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-13 16:30:27,097 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:30:27,097 INFO L85 PathProgramCache]: Analyzing trace with hash 1349804703, now seen corresponding path program 2 times [2024-11-13 16:30:27,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:30:27,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799413179] [2024-11-13 16:30:27,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:30:27,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:30:27,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:30:27,190 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-13 16:30:27,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:30:27,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799413179] [2024-11-13 16:30:27,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799413179] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:30:27,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067261200] [2024-11-13 16:30:27,191 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 16:30:27,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:30:27,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:30:27,192 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:30:27,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-13 16:30:27,284 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-13 16:30:27,284 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 16:30:27,285 INFO L255 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-13 16:30:27,286 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:30:27,327 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 [2024-11-13 16:30:27,597 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-13 16:30:27,597 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:30:28,024 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-13 16:30:28,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067261200] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:30:28,024 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:30:28,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 19 [2024-11-13 16:30:28,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485762662] [2024-11-13 16:30:28,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:30:28,024 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-13 16:30:28,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:30:28,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-13 16:30:28,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2024-11-13 16:30:29,179 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 66 [2024-11-13 16:30:29,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 243 transitions, 3760 flow. Second operand has 19 states, 19 states have (on average 29.0) internal successors, (551), 19 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:30:29,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 16:30:29,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 66 [2024-11-13 16:30:29,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 16:30:32,091 INFO L124 PetriNetUnfolderBase]: 8911/16003 cut-off events. [2024-11-13 16:30:32,091 INFO L125 PetriNetUnfolderBase]: For 177964/178825 co-relation queries the response was YES. [2024-11-13 16:30:32,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82744 conditions, 16003 events. 8911/16003 cut-off events. For 177964/178825 co-relation queries the response was YES. Maximal size of possible extension queue 611. Compared 127824 event pairs, 3108 based on Foata normal form. 60/15746 useless extension candidates. Maximal degree in co-relation 77298. Up to 3674 conditions per place. [2024-11-13 16:30:32,511 INFO L140 encePairwiseOnDemand]: 56/66 looper letters, 362 selfloop transitions, 126 changer transitions 0/504 dead transitions. [2024-11-13 16:30:32,511 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 504 transitions, 8211 flow [2024-11-13 16:30:32,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-13 16:30:32,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-13 16:30:32,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 615 transitions. [2024-11-13 16:30:32,514 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5481283422459893 [2024-11-13 16:30:32,514 INFO L175 Difference]: Start difference. First operand has 195 places, 243 transitions, 3760 flow. Second operand 17 states and 615 transitions. [2024-11-13 16:30:32,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 504 transitions, 8211 flow [2024-11-13 16:30:33,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 504 transitions, 8040 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-11-13 16:30:33,081 INFO L231 Difference]: Finished difference. Result has 208 places, 291 transitions, 4960 flow [2024-11-13 16:30:33,081 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=3639, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=4960, PETRI_PLACES=208, PETRI_TRANSITIONS=291} [2024-11-13 16:30:33,081 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 146 predicate places. [2024-11-13 16:30:33,081 INFO L471 AbstractCegarLoop]: Abstraction has has 208 places, 291 transitions, 4960 flow [2024-11-13 16:30:33,082 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 29.0) internal successors, (551), 19 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 16:30:33,082 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 16:30:33,082 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:30:33,094 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-11-13 16:30:33,282 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:30:33,282 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-13 16:30:33,282 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:30:33,282 INFO L85 PathProgramCache]: Analyzing trace with hash 934831346, now seen corresponding path program 1 times [2024-11-13 16:30:33,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:30:33,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308734901] [2024-11-13 16:30:33,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:30:33,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:30:33,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:30:33,418 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 16:30:33,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:30:33,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308734901] [2024-11-13 16:30:33,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308734901] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:30:33,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046178299] [2024-11-13 16:30:33,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:30:33,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:30:33,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:30:33,421 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:30:33,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-13 16:30:33,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:30:33,533 INFO L255 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-13 16:30:33,534 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:30:33,609 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 16:30:33,609 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:30:33,709 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 16:30:33,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046178299] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-13 16:30:33,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-13 16:30:33,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 6] total 14 [2024-11-13 16:30:33,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17351091] [2024-11-13 16:30:33,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 16:30:33,709 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-13 16:30:33,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:30:33,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-13 16:30:33,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2024-11-13 16:30:33,778 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 66 [2024-11-13 16:30:33,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 291 transitions, 4960 flow. Second operand has 7 states, 7 states have (on average 34.57142857142857) internal successors, (242), 7 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) [2024-11-13 16:30:33,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 16:30:33,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 66 [2024-11-13 16:30:33,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 16:30:35,666 INFO L124 PetriNetUnfolderBase]: 5628/10867 cut-off events. [2024-11-13 16:30:35,667 INFO L125 PetriNetUnfolderBase]: For 143680/144166 co-relation queries the response was YES. [2024-11-13 16:30:35,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58610 conditions, 10867 events. 5628/10867 cut-off events. For 143680/144166 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 87273 event pairs, 2467 based on Foata normal form. 220/10769 useless extension candidates. Maximal degree in co-relation 55475. Up to 5750 conditions per place. [2024-11-13 16:30:35,792 INFO L140 encePairwiseOnDemand]: 57/66 looper letters, 185 selfloop transitions, 85 changer transitions 0/300 dead transitions. [2024-11-13 16:30:35,792 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 300 transitions, 5458 flow [2024-11-13 16:30:35,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-13 16:30:35,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-13 16:30:35,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 264 transitions. [2024-11-13 16:30:35,793 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-11-13 16:30:35,794 INFO L175 Difference]: Start difference. First operand has 208 places, 291 transitions, 4960 flow. Second operand 7 states and 264 transitions. [2024-11-13 16:30:35,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 300 transitions, 5458 flow [2024-11-13 16:30:36,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 300 transitions, 5298 flow, removed 42 selfloop flow, removed 10 redundant places. [2024-11-13 16:30:36,143 INFO L231 Difference]: Finished difference. Result has 200 places, 260 transitions, 4353 flow [2024-11-13 16:30:36,143 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=4183, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4353, PETRI_PLACES=200, PETRI_TRANSITIONS=260} [2024-11-13 16:30:36,144 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 138 predicate places. [2024-11-13 16:30:36,144 INFO L471 AbstractCegarLoop]: Abstraction has has 200 places, 260 transitions, 4353 flow [2024-11-13 16:30:36,144 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 34.57142857142857) internal successors, (242), 7 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) [2024-11-13 16:30:36,144 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 16:30:36,144 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:30:36,162 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-11-13 16:30:36,345 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2024-11-13 16:30:36,345 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-13 16:30:36,345 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:30:36,345 INFO L85 PathProgramCache]: Analyzing trace with hash -1079515314, now seen corresponding path program 1 times [2024-11-13 16:30:36,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:30:36,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652563229] [2024-11-13 16:30:36,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:30:36,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:30:36,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:30:36,790 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 16:30:36,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:30:36,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652563229] [2024-11-13 16:30:36,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652563229] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:30:36,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956717621] [2024-11-13 16:30:36,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:30:36,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:30:36,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:30:36,792 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:30:36,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-11-13 16:30:36,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:30:36,901 INFO L255 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-13 16:30:36,902 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:30:37,409 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 16:30:37,409 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:30:38,116 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 16:30:38,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956717621] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:30:38,116 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:30:38,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 31 [2024-11-13 16:30:38,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753809256] [2024-11-13 16:30:38,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:30:38,117 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-13 16:30:38,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:30:38,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-13 16:30:38,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=767, Unknown=0, NotChecked=0, Total=992 [2024-11-13 16:30:38,424 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 66 [2024-11-13 16:30:38,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 260 transitions, 4353 flow. Second operand has 32 states, 32 states have (on average 33.3125) internal successors, (1066), 32 states have internal predecessors, (1066), 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) [2024-11-13 16:30:38,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 16:30:38,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 66 [2024-11-13 16:30:38,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 16:30:40,663 INFO L124 PetriNetUnfolderBase]: 6012/11352 cut-off events. [2024-11-13 16:30:40,663 INFO L125 PetriNetUnfolderBase]: For 154360/155038 co-relation queries the response was YES. [2024-11-13 16:30:40,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60476 conditions, 11352 events. 6012/11352 cut-off events. For 154360/155038 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 91227 event pairs, 1951 based on Foata normal form. 37/11175 useless extension candidates. Maximal degree in co-relation 57425. Up to 5076 conditions per place. [2024-11-13 16:30:40,774 INFO L140 encePairwiseOnDemand]: 50/66 looper letters, 289 selfloop transitions, 98 changer transitions 4/421 dead transitions. [2024-11-13 16:30:40,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 421 transitions, 6497 flow [2024-11-13 16:30:40,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-13 16:30:40,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-11-13 16:30:40,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 909 transitions. [2024-11-13 16:30:40,776 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5988142292490118 [2024-11-13 16:30:40,776 INFO L175 Difference]: Start difference. First operand has 200 places, 260 transitions, 4353 flow. Second operand 23 states and 909 transitions. [2024-11-13 16:30:40,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 421 transitions, 6497 flow [2024-11-13 16:30:41,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 421 transitions, 6307 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-13 16:30:41,065 INFO L231 Difference]: Finished difference. Result has 224 places, 288 transitions, 4771 flow [2024-11-13 16:30:41,066 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=4183, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=4771, PETRI_PLACES=224, PETRI_TRANSITIONS=288} [2024-11-13 16:30:41,066 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 162 predicate places. [2024-11-13 16:30:41,066 INFO L471 AbstractCegarLoop]: Abstraction has has 224 places, 288 transitions, 4771 flow [2024-11-13 16:30:41,066 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 33.3125) internal successors, (1066), 32 states have internal predecessors, (1066), 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) [2024-11-13 16:30:41,066 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 16:30:41,066 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:30:41,080 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-11-13 16:30:41,267 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2024-11-13 16:30:41,267 INFO L396 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-13 16:30:41,267 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:30:41,267 INFO L85 PathProgramCache]: Analyzing trace with hash 1647408562, now seen corresponding path program 1 times [2024-11-13 16:30:41,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:30:41,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085551465] [2024-11-13 16:30:41,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:30:41,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:30:41,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:30:41,657 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-13 16:30:41,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:30:41,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085551465] [2024-11-13 16:30:41,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085551465] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:30:41,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291830552] [2024-11-13 16:30:41,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:30:41,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:30:41,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:30:41,659 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:30:41,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-11-13 16:30:41,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:30:41,769 INFO L255 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-13 16:30:41,770 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:30:41,900 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-11-13 16:30:41,900 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2024-11-13 16:30:41,912 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-13 16:30:41,912 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:30:42,091 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-11-13 16:30:42,091 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2024-11-13 16:30:42,111 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-13 16:30:42,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291830552] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:30:42,111 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:30:42,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2024-11-13 16:30:42,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450753125] [2024-11-13 16:30:42,111 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:30:42,112 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-13 16:30:42,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:30:42,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-13 16:30:42,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2024-11-13 16:30:43,253 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 66 [2024-11-13 16:30:43,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 288 transitions, 4771 flow. Second operand has 23 states, 23 states have (on average 30.652173913043477) internal successors, (705), 23 states have internal predecessors, (705), 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) [2024-11-13 16:30:43,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 16:30:43,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 66 [2024-11-13 16:30:43,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 16:30:46,925 INFO L124 PetriNetUnfolderBase]: 9655/17237 cut-off events. [2024-11-13 16:30:46,925 INFO L125 PetriNetUnfolderBase]: For 198618/198808 co-relation queries the response was YES. [2024-11-13 16:30:47,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92202 conditions, 17237 events. 9655/17237 cut-off events. For 198618/198808 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 132147 event pairs, 1775 based on Foata normal form. 352/17589 useless extension candidates. Maximal degree in co-relation 89987. Up to 7776 conditions per place. [2024-11-13 16:30:47,356 INFO L140 encePairwiseOnDemand]: 52/66 looper letters, 508 selfloop transitions, 91 changer transitions 10/628 dead transitions. [2024-11-13 16:30:47,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 628 transitions, 11207 flow [2024-11-13 16:30:47,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-13 16:30:47,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-13 16:30:47,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 468 transitions. [2024-11-13 16:30:47,358 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5909090909090909 [2024-11-13 16:30:47,358 INFO L175 Difference]: Start difference. First operand has 224 places, 288 transitions, 4771 flow. Second operand 12 states and 468 transitions. [2024-11-13 16:30:47,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 628 transitions, 11207 flow [2024-11-13 16:30:47,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 628 transitions, 11094 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-11-13 16:30:47,890 INFO L231 Difference]: Finished difference. Result has 232 places, 302 transitions, 5195 flow [2024-11-13 16:30:47,891 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=4721, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5195, PETRI_PLACES=232, PETRI_TRANSITIONS=302} [2024-11-13 16:30:47,891 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 170 predicate places. [2024-11-13 16:30:47,891 INFO L471 AbstractCegarLoop]: Abstraction has has 232 places, 302 transitions, 5195 flow [2024-11-13 16:30:47,892 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 30.652173913043477) internal successors, (705), 23 states have internal predecessors, (705), 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) [2024-11-13 16:30:47,892 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 16:30:47,892 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:30:47,908 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2024-11-13 16:30:48,092 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:30:48,092 INFO L396 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-13 16:30:48,092 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:30:48,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1756819578, now seen corresponding path program 1 times [2024-11-13 16:30:48,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:30:48,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145684879] [2024-11-13 16:30:48,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:30:48,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:30:48,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:30:48,461 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-13 16:30:48,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:30:48,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145684879] [2024-11-13 16:30:48,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145684879] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 16:30:48,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 16:30:48,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-11-13 16:30:48,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206136373] [2024-11-13 16:30:48,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 16:30:48,462 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-13 16:30:48,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:30:48,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-13 16:30:48,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2024-11-13 16:30:48,945 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 66 [2024-11-13 16:30:48,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 302 transitions, 5195 flow. Second operand has 13 states, 13 states have (on average 30.307692307692307) internal successors, (394), 13 states have internal predecessors, (394), 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) [2024-11-13 16:30:48,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 16:30:48,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 66 [2024-11-13 16:30:48,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 16:30:52,868 INFO L124 PetriNetUnfolderBase]: 10130/18303 cut-off events. [2024-11-13 16:30:52,868 INFO L125 PetriNetUnfolderBase]: For 239965/240221 co-relation queries the response was YES. [2024-11-13 16:30:52,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100872 conditions, 18303 events. 10130/18303 cut-off events. For 239965/240221 co-relation queries the response was YES. Maximal size of possible extension queue 612. Compared 145168 event pairs, 4449 based on Foata normal form. 334/18617 useless extension candidates. Maximal degree in co-relation 98219. Up to 10139 conditions per place. [2024-11-13 16:30:53,036 INFO L140 encePairwiseOnDemand]: 52/66 looper letters, 479 selfloop transitions, 137 changer transitions 1/636 dead transitions. [2024-11-13 16:30:53,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 636 transitions, 11351 flow [2024-11-13 16:30:53,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-13 16:30:53,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-13 16:30:53,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 559 transitions. [2024-11-13 16:30:53,037 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5646464646464646 [2024-11-13 16:30:53,037 INFO L175 Difference]: Start difference. First operand has 232 places, 302 transitions, 5195 flow. Second operand 15 states and 559 transitions. [2024-11-13 16:30:53,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 636 transitions, 11351 flow [2024-11-13 16:30:53,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 636 transitions, 11015 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-11-13 16:30:53,692 INFO L231 Difference]: Finished difference. Result has 248 places, 363 transitions, 6552 flow [2024-11-13 16:30:53,692 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=4940, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=6552, PETRI_PLACES=248, PETRI_TRANSITIONS=363} [2024-11-13 16:30:53,692 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 186 predicate places. [2024-11-13 16:30:53,692 INFO L471 AbstractCegarLoop]: Abstraction has has 248 places, 363 transitions, 6552 flow [2024-11-13 16:30:53,693 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 30.307692307692307) internal successors, (394), 13 states have internal predecessors, (394), 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) [2024-11-13 16:30:53,693 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 16:30:53,693 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:30:53,693 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-11-13 16:30:53,693 INFO L396 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-13 16:30:53,693 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:30:53,693 INFO L85 PathProgramCache]: Analyzing trace with hash -465478032, now seen corresponding path program 2 times [2024-11-13 16:30:53,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:30:53,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447893205] [2024-11-13 16:30:53,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:30:53,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:30:53,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:30:54,129 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-13 16:30:54,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:30:54,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447893205] [2024-11-13 16:30:54,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447893205] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:30:54,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415676412] [2024-11-13 16:30:54,130 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 16:30:54,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:30:54,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:30:54,132 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:30:54,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-11-13 16:30:54,261 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 16:30:54,261 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 16:30:54,263 INFO L255 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-13 16:30:54,264 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:30:54,595 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-13 16:30:54,595 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2024-11-13 16:30:54,608 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-13 16:30:54,608 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:30:54,766 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-11-13 16:30:54,766 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-11-13 16:30:54,867 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-13 16:30:54,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415676412] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:30:54,867 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:30:54,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2024-11-13 16:30:54,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74733460] [2024-11-13 16:30:54,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:30:54,871 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-13 16:30:54,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:30:54,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-13 16:30:54,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2024-11-13 16:30:56,276 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 66 [2024-11-13 16:30:56,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 363 transitions, 6552 flow. Second operand has 21 states, 21 states have (on average 30.666666666666668) internal successors, (644), 21 states have internal predecessors, (644), 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) [2024-11-13 16:30:56,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 16:30:56,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 66 [2024-11-13 16:30:56,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 16:31:01,499 INFO L124 PetriNetUnfolderBase]: 12756/22790 cut-off events. [2024-11-13 16:31:01,500 INFO L125 PetriNetUnfolderBase]: For 333703/334058 co-relation queries the response was YES. [2024-11-13 16:31:01,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135611 conditions, 22790 events. 12756/22790 cut-off events. For 333703/334058 co-relation queries the response was YES. Maximal size of possible extension queue 805. Compared 185866 event pairs, 5657 based on Foata normal form. 487/23255 useless extension candidates. Maximal degree in co-relation 132136. Up to 13227 conditions per place. [2024-11-13 16:31:01,740 INFO L140 encePairwiseOnDemand]: 51/66 looper letters, 407 selfloop transitions, 247 changer transitions 4/677 dead transitions. [2024-11-13 16:31:01,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 677 transitions, 13528 flow [2024-11-13 16:31:01,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-13 16:31:01,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-13 16:31:01,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 454 transitions. [2024-11-13 16:31:01,930 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5732323232323232 [2024-11-13 16:31:01,930 INFO L175 Difference]: Start difference. First operand has 248 places, 363 transitions, 6552 flow. Second operand 12 states and 454 transitions. [2024-11-13 16:31:01,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 677 transitions, 13528 flow [2024-11-13 16:31:03,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 677 transitions, 13002 flow, removed 52 selfloop flow, removed 6 redundant places. [2024-11-13 16:31:03,401 INFO L231 Difference]: Finished difference. Result has 259 places, 492 transitions, 9948 flow [2024-11-13 16:31:03,402 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=6278, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=9948, PETRI_PLACES=259, PETRI_TRANSITIONS=492} [2024-11-13 16:31:03,402 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 197 predicate places. [2024-11-13 16:31:03,402 INFO L471 AbstractCegarLoop]: Abstraction has has 259 places, 492 transitions, 9948 flow [2024-11-13 16:31:03,403 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 30.666666666666668) internal successors, (644), 21 states have internal predecessors, (644), 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) [2024-11-13 16:31:03,403 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 16:31:03,403 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:31:03,425 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2024-11-13 16:31:03,607 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_491c01fb-3b5d-4b7b-98e9-0203d13c8a4d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2024-11-13 16:31:03,608 INFO L396 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-13 16:31:03,608 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:31:03,608 INFO L85 PathProgramCache]: Analyzing trace with hash 1253471068, now seen corresponding path program 3 times [2024-11-13 16:31:03,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:31:03,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100362559] [2024-11-13 16:31:03,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:31:03,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:31:03,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:31:04,073 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-13 16:31:04,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:31:04,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100362559] [2024-11-13 16:31:04,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100362559] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 16:31:04,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 16:31:04,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-11-13 16:31:04,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999889404] [2024-11-13 16:31:04,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 16:31:04,074 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-13 16:31:04,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:31:04,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-13 16:31:04,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2024-11-13 16:31:04,527 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 66 [2024-11-13 16:31:04,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 492 transitions, 9948 flow. Second operand has 13 states, 13 states have (on average 30.307692307692307) internal successors, (394), 13 states have internal predecessors, (394), 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) [2024-11-13 16:31:04,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 16:31:04,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 66 [2024-11-13 16:31:04,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 16:31:10,489 INFO L124 PetriNetUnfolderBase]: 13878/24700 cut-off events. [2024-11-13 16:31:10,489 INFO L125 PetriNetUnfolderBase]: For 399309/399720 co-relation queries the response was YES. [2024-11-13 16:31:10,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153924 conditions, 24700 events. 13878/24700 cut-off events. For 399309/399720 co-relation queries the response was YES. Maximal size of possible extension queue 924. Compared 204231 event pairs, 5725 based on Foata normal form. 485/25163 useless extension candidates. Maximal degree in co-relation 150110. Up to 13419 conditions per place. [2024-11-13 16:31:10,767 INFO L140 encePairwiseOnDemand]: 52/66 looper letters, 482 selfloop transitions, 349 changer transitions 0/850 dead transitions. [2024-11-13 16:31:10,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 850 transitions, 18835 flow [2024-11-13 16:31:10,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-13 16:31:10,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-13 16:31:10,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 516 transitions. [2024-11-13 16:31:10,769 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5584415584415584 [2024-11-13 16:31:10,769 INFO L175 Difference]: Start difference. First operand has 259 places, 492 transitions, 9948 flow. Second operand 14 states and 516 transitions. [2024-11-13 16:31:10,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 850 transitions, 18835 flow [2024-11-13 16:31:13,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 850 transitions, 17689 flow, removed 310 selfloop flow, removed 6 redundant places. [2024-11-13 16:31:13,178 INFO L231 Difference]: Finished difference. Result has 274 places, 626 transitions, 13714 flow [2024-11-13 16:31:13,178 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=9450, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=215, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=13714, PETRI_PLACES=274, PETRI_TRANSITIONS=626} [2024-11-13 16:31:13,179 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 212 predicate places. [2024-11-13 16:31:13,179 INFO L471 AbstractCegarLoop]: Abstraction has has 274 places, 626 transitions, 13714 flow [2024-11-13 16:31:13,180 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 30.307692307692307) internal successors, (394), 13 states have internal predecessors, (394), 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) [2024-11-13 16:31:13,180 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 16:31:13,181 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:31:13,181 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-11-13 16:31:13,181 INFO L396 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-13 16:31:13,181 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:31:13,181 INFO L85 PathProgramCache]: Analyzing trace with hash -2018284656, now seen corresponding path program 4 times [2024-11-13 16:31:13,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:31:13,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069714592] [2024-11-13 16:31:13,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:31:13,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:31:13,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:31:13,646 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-13 16:31:13,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:31:13,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069714592] [2024-11-13 16:31:13,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069714592] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 16:31:13,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 16:31:13,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-11-13 16:31:13,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100053887] [2024-11-13 16:31:13,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 16:31:13,648 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-13 16:31:13,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:31:13,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-13 16:31:13,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2024-11-13 16:31:14,204 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 66 [2024-11-13 16:31:14,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 626 transitions, 13714 flow. Second operand has 13 states, 13 states have (on average 30.307692307692307) internal successors, (394), 13 states have internal predecessors, (394), 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) [2024-11-13 16:31:14,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 16:31:14,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 66 [2024-11-13 16:31:14,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 16:31:21,137 INFO L124 PetriNetUnfolderBase]: 15187/27045 cut-off events. [2024-11-13 16:31:21,137 INFO L125 PetriNetUnfolderBase]: For 463461/463912 co-relation queries the response was YES. [2024-11-13 16:31:21,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 173672 conditions, 27045 events. 15187/27045 cut-off events. For 463461/463912 co-relation queries the response was YES. Maximal size of possible extension queue 1058. Compared 227226 event pairs, 6754 based on Foata normal form. 529/27545 useless extension candidates. Maximal degree in co-relation 169742. Up to 14418 conditions per place. [2024-11-13 16:31:21,509 INFO L140 encePairwiseOnDemand]: 52/66 looper letters, 382 selfloop transitions, 487 changer transitions 0/888 dead transitions. [2024-11-13 16:31:21,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 888 transitions, 20735 flow [2024-11-13 16:31:21,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-13 16:31:21,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-13 16:31:21,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 511 transitions. [2024-11-13 16:31:21,510 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.553030303030303 [2024-11-13 16:31:21,510 INFO L175 Difference]: Start difference. First operand has 274 places, 626 transitions, 13714 flow. Second operand 14 states and 511 transitions. [2024-11-13 16:31:21,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 888 transitions, 20735 flow [2024-11-13 16:31:24,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 888 transitions, 20103 flow, removed 49 selfloop flow, removed 5 redundant places. [2024-11-13 16:31:24,307 INFO L231 Difference]: Finished difference. Result has 291 places, 774 transitions, 18430 flow [2024-11-13 16:31:24,307 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=13215, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=626, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=339, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=18430, PETRI_PLACES=291, PETRI_TRANSITIONS=774} [2024-11-13 16:31:24,307 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 229 predicate places. [2024-11-13 16:31:24,307 INFO L471 AbstractCegarLoop]: Abstraction has has 291 places, 774 transitions, 18430 flow [2024-11-13 16:31:24,308 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 30.307692307692307) internal successors, (394), 13 states have internal predecessors, (394), 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) [2024-11-13 16:31:24,308 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 16:31:24,308 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:31:24,308 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-11-13 16:31:24,308 INFO L396 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-13 16:31:24,308 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:31:24,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1431797196, now seen corresponding path program 5 times [2024-11-13 16:31:24,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:31:24,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229002618] [2024-11-13 16:31:24,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:31:24,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:31:24,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:31:24,668 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-13 16:31:24,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:31:24,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229002618] [2024-11-13 16:31:24,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229002618] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 16:31:24,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 16:31:24,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-11-13 16:31:24,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848993539] [2024-11-13 16:31:24,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 16:31:24,669 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-13 16:31:24,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:31:24,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-13 16:31:24,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-11-13 16:31:25,081 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 66 [2024-11-13 16:31:25,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 774 transitions, 18430 flow. Second operand has 12 states, 12 states have (on average 30.5) internal successors, (366), 12 states have internal predecessors, (366), 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) [2024-11-13 16:31:25,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 16:31:25,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 66 [2024-11-13 16:31:25,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 16:31:33,488 INFO L124 PetriNetUnfolderBase]: 15966/28218 cut-off events. [2024-11-13 16:31:33,488 INFO L125 PetriNetUnfolderBase]: For 529280/529735 co-relation queries the response was YES. [2024-11-13 16:31:33,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 189581 conditions, 28218 events. 15966/28218 cut-off events. For 529280/529735 co-relation queries the response was YES. Maximal size of possible extension queue 1102. Compared 236526 event pairs, 6482 based on Foata normal form. 583/28766 useless extension candidates. Maximal degree in co-relation 185229. Up to 15471 conditions per place. [2024-11-13 16:31:33,916 INFO L140 encePairwiseOnDemand]: 52/66 looper letters, 515 selfloop transitions, 462 changer transitions 1/997 dead transitions. [2024-11-13 16:31:33,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 997 transitions, 24593 flow [2024-11-13 16:31:33,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-13 16:31:33,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-13 16:31:33,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 415 transitions. [2024-11-13 16:31:33,918 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.571625344352617 [2024-11-13 16:31:33,918 INFO L175 Difference]: Start difference. First operand has 291 places, 774 transitions, 18430 flow. Second operand 11 states and 415 transitions. [2024-11-13 16:31:33,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 997 transitions, 24593 flow [2024-11-13 16:31:37,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 997 transitions, 23738 flow, removed 121 selfloop flow, removed 4 redundant places. [2024-11-13 16:31:37,648 INFO L231 Difference]: Finished difference. Result has 302 places, 837 transitions, 20461 flow [2024-11-13 16:31:37,649 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=17657, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=774, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=399, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=20461, PETRI_PLACES=302, PETRI_TRANSITIONS=837} [2024-11-13 16:31:37,649 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 240 predicate places. [2024-11-13 16:31:37,649 INFO L471 AbstractCegarLoop]: Abstraction has has 302 places, 837 transitions, 20461 flow [2024-11-13 16:31:37,649 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 30.5) internal successors, (366), 12 states have internal predecessors, (366), 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) [2024-11-13 16:31:37,649 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 16:31:37,650 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:31:37,650 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-11-13 16:31:37,650 INFO L396 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-13 16:31:37,650 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:31:37,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1972515500, now seen corresponding path program 2 times [2024-11-13 16:31:37,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:31:37,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638539106] [2024-11-13 16:31:37,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:31:37,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:31:37,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:31:38,213 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-13 16:31:38,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:31:38,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638539106] [2024-11-13 16:31:38,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638539106] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 16:31:38,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 16:31:38,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-11-13 16:31:38,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963824109] [2024-11-13 16:31:38,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 16:31:38,214 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-13 16:31:38,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:31:38,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-13 16:31:38,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-11-13 16:31:38,589 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 66 [2024-11-13 16:31:38,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 837 transitions, 20461 flow. Second operand has 13 states, 13 states have (on average 30.307692307692307) internal successors, (394), 13 states have internal predecessors, (394), 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) [2024-11-13 16:31:38,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 16:31:38,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 66 [2024-11-13 16:31:38,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand