./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/array-eq-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_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/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_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/array-eq-symm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/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_33db0e0b-50b7-4649-8fc7-97b66a991d83/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 6897befed0dbbae24492a1e82d50fcd0be6b3857b241d882a904d02a513d7a6d --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-13 13:46:15,781 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-13 13:46:15,848 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-13 13:46:15,854 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-13 13:46:15,854 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-13 13:46:15,889 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-13 13:46:15,891 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-13 13:46:15,892 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-13 13:46:15,892 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-13 13:46:15,893 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-13 13:46:15,893 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-13 13:46:15,893 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-13 13:46:15,894 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-13 13:46:15,894 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-13 13:46:15,895 INFO L153 SettingsManager]: * Use SBE=true [2024-11-13 13:46:15,895 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-13 13:46:15,895 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-13 13:46:15,895 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-13 13:46:15,895 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-13 13:46:15,896 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-13 13:46:15,896 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-13 13:46:15,896 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-13 13:46:15,896 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-13 13:46:15,896 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-13 13:46:15,896 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-13 13:46:15,896 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-13 13:46:15,896 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-13 13:46:15,896 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-13 13:46:15,896 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-13 13:46:15,896 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-13 13:46:15,896 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-13 13:46:15,896 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-13 13:46:15,897 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-13 13:46:15,897 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 13:46:15,897 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-13 13:46:15,897 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-13 13:46:15,897 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-13 13:46:15,897 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-13 13:46:15,897 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-13 13:46:15,897 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-13 13:46:15,897 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-13 13:46:15,899 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-13 13:46:15,899 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_33db0e0b-50b7-4649-8fc7-97b66a991d83/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 -> 6897befed0dbbae24492a1e82d50fcd0be6b3857b241d882a904d02a513d7a6d [2024-11-13 13:46:16,210 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-13 13:46:16,222 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-13 13:46:16,225 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-13 13:46:16,226 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-13 13:46:16,227 INFO L274 PluginConnector]: CDTParser initialized [2024-11-13 13:46:16,228 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/../../sv-benchmarks/c/weaver/array-eq-symm.wvr.c Unable to find full path for "g++" [2024-11-13 13:46:18,096 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-13 13:46:18,383 INFO L384 CDTParser]: Found 1 translation units. [2024-11-13 13:46:18,384 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/sv-benchmarks/c/weaver/array-eq-symm.wvr.c [2024-11-13 13:46:18,407 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/data/abfcb52c4/1331c62ede994403b6dc95aa8c323fc2/FLAGae35667cd [2024-11-13 13:46:18,682 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/data/abfcb52c4/1331c62ede994403b6dc95aa8c323fc2 [2024-11-13 13:46:18,684 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-13 13:46:18,686 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-13 13:46:18,687 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-13 13:46:18,687 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-13 13:46:18,692 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-13 13:46:18,693 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 01:46:18" (1/1) ... [2024-11-13 13:46:18,694 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@794f5c5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:46:18, skipping insertion in model container [2024-11-13 13:46:18,694 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 01:46:18" (1/1) ... [2024-11-13 13:46:18,711 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-13 13:46:18,888 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 13:46:18,892 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 13:46:18,902 INFO L200 MainTranslator]: Completed pre-run [2024-11-13 13:46:18,923 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 13:46:18,941 INFO L204 MainTranslator]: Completed translation [2024-11-13 13:46:18,942 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:46:18 WrapperNode [2024-11-13 13:46:18,942 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-13 13:46:18,945 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-13 13:46:18,945 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-13 13:46:18,945 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-13 13:46:18,954 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:46:18" (1/1) ... [2024-11-13 13:46:18,961 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:46:18" (1/1) ... [2024-11-13 13:46:18,982 INFO L138 Inliner]: procedures = 22, calls = 20, calls flagged for inlining = 8, calls inlined = 10, statements flattened = 105 [2024-11-13 13:46:18,982 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-13 13:46:18,983 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-13 13:46:18,983 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-13 13:46:18,983 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-13 13:46:18,993 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:46:18" (1/1) ... [2024-11-13 13:46:18,993 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:46:18" (1/1) ... [2024-11-13 13:46:18,995 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:46:18" (1/1) ... [2024-11-13 13:46:19,010 INFO L175 MemorySlicer]: Split 8 memory accesses to 2 slices as follows [2, 6]. 75 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 13:46:19,010 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:46:18" (1/1) ... [2024-11-13 13:46:19,010 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:46:18" (1/1) ... [2024-11-13 13:46:19,017 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:46:18" (1/1) ... [2024-11-13 13:46:19,021 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:46:18" (1/1) ... [2024-11-13 13:46:19,023 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:46:18" (1/1) ... [2024-11-13 13:46:19,024 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:46:18" (1/1) ... [2024-11-13 13:46:19,027 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-13 13:46:19,027 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-13 13:46:19,027 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-13 13:46:19,028 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-13 13:46:19,029 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:46:18" (1/1) ... [2024-11-13 13:46:19,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 13:46:19,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:46:19,067 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-13 13:46:19,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-13 13:46:19,103 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-13 13:46:19,103 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-13 13:46:19,103 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-13 13:46:19,103 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-13 13:46:19,104 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-13 13:46:19,105 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-13 13:46:19,105 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-13 13:46:19,105 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-13 13:46:19,105 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-13 13:46:19,105 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-13 13:46:19,105 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-13 13:46:19,105 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-13 13:46:19,105 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-13 13:46:19,106 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-13 13:46:19,107 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 13:46:19,242 INFO L238 CfgBuilder]: Building ICFG [2024-11-13 13:46:19,245 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-13 13:46:19,765 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-13 13:46:19,769 INFO L287 CfgBuilder]: Performing block encoding [2024-11-13 13:46:20,091 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-13 13:46:20,091 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-13 13:46:20,092 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 01:46:20 BoogieIcfgContainer [2024-11-13 13:46:20,092 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-13 13:46:20,110 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-13 13:46:20,111 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-13 13:46:20,116 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-13 13:46:20,116 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 01:46:18" (1/3) ... [2024-11-13 13:46:20,117 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22178953 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 01:46:20, skipping insertion in model container [2024-11-13 13:46:20,118 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:46:18" (2/3) ... [2024-11-13 13:46:20,118 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22178953 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 01:46:20, skipping insertion in model container [2024-11-13 13:46:20,118 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 01:46:20" (3/3) ... [2024-11-13 13:46:20,121 INFO L112 eAbstractionObserver]: Analyzing ICFG array-eq-symm.wvr.c [2024-11-13 13:46:20,135 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-13 13:46:20,136 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG array-eq-symm.wvr.c that has 3 procedures, 43 locations, 1 initial locations, 4 loop locations, and 14 error locations. [2024-11-13 13:46:20,137 INFO L492 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-13 13:46:20,202 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-13 13:46:20,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 49 places, 48 transitions, 110 flow [2024-11-13 13:46:20,269 INFO L124 PetriNetUnfolderBase]: 6/46 cut-off events. [2024-11-13 13:46:20,271 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-13 13:46:20,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55 conditions, 46 events. 6/46 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 103 event pairs, 0 based on Foata normal form. 0/26 useless extension candidates. Maximal degree in co-relation 29. Up to 2 conditions per place. [2024-11-13 13:46:20,275 INFO L82 GeneralOperation]: Start removeDead. Operand has 49 places, 48 transitions, 110 flow [2024-11-13 13:46:20,279 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 46 places, 45 transitions, 102 flow [2024-11-13 13:46:20,288 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-13 13:46:20,301 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;@3a6b9ff, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-13 13:46:20,301 INFO L334 AbstractCegarLoop]: Starting to check reachability of 24 error locations. [2024-11-13 13:46:20,306 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-13 13:46:20,306 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-13 13:46:20,306 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-13 13:46:20,307 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:46:20,307 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-13 13:46:20,308 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-13 13:46:20,315 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:46:20,315 INFO L85 PathProgramCache]: Analyzing trace with hash 463469, now seen corresponding path program 1 times [2024-11-13 13:46:20,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:46:20,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112111815] [2024-11-13 13:46:20,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:46:20,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:46:20,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:46:20,588 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 13:46:20,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:46:20,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112111815] [2024-11-13 13:46:20,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112111815] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 13:46:20,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 13:46:20,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-13 13:46:20,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655859625] [2024-11-13 13:46:20,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 13:46:20,601 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 13:46:20,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:46:20,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 13:46:20,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 13:46:20,691 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2024-11-13 13:46:20,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 45 transitions, 102 flow. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states 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 13:46:20,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:46:20,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2024-11-13 13:46:20,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:46:20,826 INFO L124 PetriNetUnfolderBase]: 101/218 cut-off events. [2024-11-13 13:46:20,826 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2024-11-13 13:46:20,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 385 conditions, 218 events. 101/218 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 811 event pairs, 35 based on Foata normal form. 1/130 useless extension candidates. Maximal degree in co-relation 329. Up to 143 conditions per place. [2024-11-13 13:46:20,831 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 20 selfloop transitions, 2 changer transitions 0/41 dead transitions. [2024-11-13 13:46:20,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 41 transitions, 138 flow [2024-11-13 13:46:20,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 13:46:20,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-13 13:46:20,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 91 transitions. [2024-11-13 13:46:20,844 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6319444444444444 [2024-11-13 13:46:20,846 INFO L175 Difference]: Start difference. First operand has 46 places, 45 transitions, 102 flow. Second operand 3 states and 91 transitions. [2024-11-13 13:46:20,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 41 transitions, 138 flow [2024-11-13 13:46:20,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 41 transitions, 130 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-13 13:46:20,854 INFO L231 Difference]: Finished difference. Result has 40 places, 41 transitions, 90 flow [2024-11-13 13:46:20,857 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=40, PETRI_TRANSITIONS=41} [2024-11-13 13:46:20,861 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, -6 predicate places. [2024-11-13 13:46:20,861 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 41 transitions, 90 flow [2024-11-13 13:46:20,861 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states 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 13:46:20,861 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:46:20,861 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-13 13:46:20,862 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-13 13:46:20,862 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-13 13:46:20,862 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:46:20,863 INFO L85 PathProgramCache]: Analyzing trace with hash 463470, now seen corresponding path program 1 times [2024-11-13 13:46:20,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:46:20,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311018683] [2024-11-13 13:46:20,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:46:20,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:46:20,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:46:21,324 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 13:46:21,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:46:21,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311018683] [2024-11-13 13:46:21,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311018683] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 13:46:21,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 13:46:21,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-13 13:46:21,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529546191] [2024-11-13 13:46:21,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 13:46:21,326 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 13:46:21,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:46:21,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 13:46:21,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 13:46:21,418 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2024-11-13 13:46:21,419 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 41 transitions, 90 flow. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states 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 13:46:21,419 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:46:21,419 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2024-11-13 13:46:21,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:46:21,634 INFO L124 PetriNetUnfolderBase]: 102/221 cut-off events. [2024-11-13 13:46:21,634 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-13 13:46:21,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 384 conditions, 221 events. 102/221 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 821 event pairs, 35 based on Foata normal form. 0/130 useless extension candidates. Maximal degree in co-relation 355. Up to 152 conditions per place. [2024-11-13 13:46:21,637 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 23 selfloop transitions, 4 changer transitions 0/44 dead transitions. [2024-11-13 13:46:21,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 44 transitions, 150 flow [2024-11-13 13:46:21,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 13:46:21,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-13 13:46:21,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 116 transitions. [2024-11-13 13:46:21,642 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6041666666666666 [2024-11-13 13:46:21,642 INFO L175 Difference]: Start difference. First operand has 40 places, 41 transitions, 90 flow. Second operand 4 states and 116 transitions. [2024-11-13 13:46:21,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 44 transitions, 150 flow [2024-11-13 13:46:21,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 44 transitions, 146 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-13 13:46:21,648 INFO L231 Difference]: Finished difference. Result has 43 places, 44 transitions, 113 flow [2024-11-13 13:46:21,648 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=113, PETRI_PLACES=43, PETRI_TRANSITIONS=44} [2024-11-13 13:46:21,649 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, -3 predicate places. [2024-11-13 13:46:21,649 INFO L471 AbstractCegarLoop]: Abstraction has has 43 places, 44 transitions, 113 flow [2024-11-13 13:46:21,649 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states 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 13:46:21,649 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:46:21,649 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-13 13:46:21,650 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-13 13:46:21,650 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-13 13:46:21,650 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:46:21,650 INFO L85 PathProgramCache]: Analyzing trace with hash 14368536, now seen corresponding path program 1 times [2024-11-13 13:46:21,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:46:21,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994156630] [2024-11-13 13:46:21,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:46:21,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:46:21,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:46:22,011 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 13:46:22,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:46:22,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994156630] [2024-11-13 13:46:22,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994156630] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 13:46:22,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 13:46:22,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 13:46:22,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865908559] [2024-11-13 13:46:22,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 13:46:22,013 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 13:46:22,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:46:22,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 13:46:22,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-13 13:46:22,121 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2024-11-13 13:46:22,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 44 transitions, 113 flow. Second operand has 5 states, 5 states have (on average 22.8) internal successors, (114), 5 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 13:46:22,122 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:46:22,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2024-11-13 13:46:22,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:46:22,341 INFO L124 PetriNetUnfolderBase]: 103/224 cut-off events. [2024-11-13 13:46:22,341 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-13 13:46:22,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 401 conditions, 224 events. 103/224 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 841 event pairs, 35 based on Foata normal form. 0/132 useless extension candidates. Maximal degree in co-relation 376. Up to 151 conditions per place. [2024-11-13 13:46:22,345 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 23 selfloop transitions, 7 changer transitions 0/47 dead transitions. [2024-11-13 13:46:22,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 47 transitions, 179 flow [2024-11-13 13:46:22,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 13:46:22,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-13 13:46:22,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 141 transitions. [2024-11-13 13:46:22,347 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5875 [2024-11-13 13:46:22,347 INFO L175 Difference]: Start difference. First operand has 43 places, 44 transitions, 113 flow. Second operand 5 states and 141 transitions. [2024-11-13 13:46:22,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 47 transitions, 179 flow [2024-11-13 13:46:22,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 47 transitions, 176 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-13 13:46:22,350 INFO L231 Difference]: Finished difference. Result has 48 places, 47 transitions, 147 flow [2024-11-13 13:46:22,350 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=147, PETRI_PLACES=48, PETRI_TRANSITIONS=47} [2024-11-13 13:46:22,351 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 2 predicate places. [2024-11-13 13:46:22,351 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 47 transitions, 147 flow [2024-11-13 13:46:22,351 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.8) internal successors, (114), 5 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 13:46:22,351 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:46:22,351 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-13 13:46:22,351 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-13 13:46:22,352 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-13 13:46:22,352 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:46:22,352 INFO L85 PathProgramCache]: Analyzing trace with hash 445408392, now seen corresponding path program 1 times [2024-11-13 13:46:22,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:46:22,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727053437] [2024-11-13 13:46:22,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:46:22,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:46:22,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:46:22,691 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 13:46:22,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:46:22,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727053437] [2024-11-13 13:46:22,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727053437] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:46:22,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839472055] [2024-11-13 13:46:22,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:46:22,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:46:22,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:46:22,698 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:46:22,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-13 13:46:22,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:46:22,784 INFO L255 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-13 13:46:22,789 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:46:22,872 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 13:46:23,169 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 13:46:23,170 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:46:23,336 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 13:46:23,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839472055] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:46:23,337 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 13:46:23,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-13 13:46:23,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699078056] [2024-11-13 13:46:23,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 13:46:23,337 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-13 13:46:23,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:46:23,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-13 13:46:23,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-11-13 13:46:23,775 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2024-11-13 13:46:23,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 47 transitions, 147 flow. Second operand has 11 states, 11 states have (on average 23.363636363636363) internal successors, (257), 11 states have internal predecessors, (257), 0 states have call successors, (0), 0 states 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 13:46:23,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:46:23,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2024-11-13 13:46:23,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:46:23,998 INFO L124 PetriNetUnfolderBase]: 103/223 cut-off events. [2024-11-13 13:46:23,998 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-13 13:46:23,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 414 conditions, 223 events. 103/223 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 832 event pairs, 35 based on Foata normal form. 0/134 useless extension candidates. Maximal degree in co-relation 386. Up to 151 conditions per place. [2024-11-13 13:46:24,001 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 22 selfloop transitions, 7 changer transitions 0/46 dead transitions. [2024-11-13 13:46:24,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 46 transitions, 201 flow [2024-11-13 13:46:24,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 13:46:24,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-13 13:46:24,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 159 transitions. [2024-11-13 13:46:24,003 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5520833333333334 [2024-11-13 13:46:24,003 INFO L175 Difference]: Start difference. First operand has 48 places, 47 transitions, 147 flow. Second operand 6 states and 159 transitions. [2024-11-13 13:46:24,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 46 transitions, 201 flow [2024-11-13 13:46:24,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 46 transitions, 200 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-13 13:46:24,006 INFO L231 Difference]: Finished difference. Result has 51 places, 46 transitions, 156 flow [2024-11-13 13:46:24,006 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=156, PETRI_PLACES=51, PETRI_TRANSITIONS=46} [2024-11-13 13:46:24,007 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 5 predicate places. [2024-11-13 13:46:24,007 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 46 transitions, 156 flow [2024-11-13 13:46:24,007 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 23.363636363636363) internal successors, (257), 11 states have internal predecessors, (257), 0 states have call successors, (0), 0 states 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 13:46:24,008 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:46:24,008 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-11-13 13:46:24,029 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-13 13:46:24,211 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:46:24,212 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-13 13:46:24,212 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:46:24,212 INFO L85 PathProgramCache]: Analyzing trace with hash 923275287, now seen corresponding path program 1 times [2024-11-13 13:46:24,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:46:24,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306803887] [2024-11-13 13:46:24,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:46:24,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:46:24,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:46:24,601 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 13:46:24,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:46:24,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306803887] [2024-11-13 13:46:24,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306803887] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:46:24,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882915098] [2024-11-13 13:46:24,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:46:24,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:46:24,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:46:24,606 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:46:24,609 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-13 13:46:24,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:46:24,690 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-13 13:46:24,692 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:46:24,719 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 13:46:24,873 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 13:46:24,873 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:46:25,095 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 13:46:25,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882915098] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:46:25,095 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 13:46:25,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-13 13:46:25,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012263101] [2024-11-13 13:46:25,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 13:46:25,096 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-13 13:46:25,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:46:25,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-13 13:46:25,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2024-11-13 13:46:25,663 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2024-11-13 13:46:25,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 46 transitions, 156 flow. Second operand has 13 states, 13 states have (on average 23.307692307692307) internal successors, (303), 13 states have internal predecessors, (303), 0 states have call successors, (0), 0 states 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 13:46:25,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:46:25,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2024-11-13 13:46:25,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:46:26,087 INFO L124 PetriNetUnfolderBase]: 105/228 cut-off events. [2024-11-13 13:46:26,088 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-11-13 13:46:26,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 440 conditions, 228 events. 105/228 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 849 event pairs, 35 based on Foata normal form. 0/139 useless extension candidates. Maximal degree in co-relation 394. Up to 144 conditions per place. [2024-11-13 13:46:26,090 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 16 selfloop transitions, 18 changer transitions 0/51 dead transitions. [2024-11-13 13:46:26,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 51 transitions, 253 flow [2024-11-13 13:46:26,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-13 13:46:26,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-13 13:46:26,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 234 transitions. [2024-11-13 13:46:26,093 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-11-13 13:46:26,093 INFO L175 Difference]: Start difference. First operand has 51 places, 46 transitions, 156 flow. Second operand 9 states and 234 transitions. [2024-11-13 13:46:26,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 51 transitions, 253 flow [2024-11-13 13:46:26,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 51 transitions, 206 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-11-13 13:46:26,096 INFO L231 Difference]: Finished difference. Result has 50 places, 51 transitions, 174 flow [2024-11-13 13:46:26,096 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=174, PETRI_PLACES=50, PETRI_TRANSITIONS=51} [2024-11-13 13:46:26,097 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 4 predicate places. [2024-11-13 13:46:26,097 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 51 transitions, 174 flow [2024-11-13 13:46:26,097 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 23.307692307692307) internal successors, (303), 13 states have internal predecessors, (303), 0 states have call successors, (0), 0 states 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 13:46:26,097 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:46:26,097 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:46:26,118 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-13 13:46:26,301 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:46:26,302 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-13 13:46:26,302 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:46:26,302 INFO L85 PathProgramCache]: Analyzing trace with hash -1440645845, now seen corresponding path program 1 times [2024-11-13 13:46:26,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:46:26,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192100571] [2024-11-13 13:46:26,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:46:26,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:46:26,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:46:26,393 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 13:46:26,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:46:26,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192100571] [2024-11-13 13:46:26,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192100571] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 13:46:26,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 13:46:26,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 13:46:26,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609512463] [2024-11-13 13:46:26,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 13:46:26,394 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 13:46:26,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:46:26,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 13:46:26,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 13:46:26,417 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 48 [2024-11-13 13:46:26,418 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 51 transitions, 174 flow. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states 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 13:46:26,418 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:46:26,418 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 48 [2024-11-13 13:46:26,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:46:26,570 INFO L124 PetriNetUnfolderBase]: 165/384 cut-off events. [2024-11-13 13:46:26,570 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-13 13:46:26,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 722 conditions, 384 events. 165/384 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1814 event pairs, 71 based on Foata normal form. 0/243 useless extension candidates. Maximal degree in co-relation 421. Up to 175 conditions per place. [2024-11-13 13:46:26,575 INFO L140 encePairwiseOnDemand]: 42/48 looper letters, 52 selfloop transitions, 5 changer transitions 0/73 dead transitions. [2024-11-13 13:46:26,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 73 transitions, 374 flow [2024-11-13 13:46:26,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 13:46:26,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-13 13:46:26,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 161 transitions. [2024-11-13 13:46:26,578 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6708333333333333 [2024-11-13 13:46:26,578 INFO L175 Difference]: Start difference. First operand has 50 places, 51 transitions, 174 flow. Second operand 5 states and 161 transitions. [2024-11-13 13:46:26,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 73 transitions, 374 flow [2024-11-13 13:46:26,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 73 transitions, 321 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-11-13 13:46:26,582 INFO L231 Difference]: Finished difference. Result has 51 places, 53 transitions, 170 flow [2024-11-13 13:46:26,582 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=141, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=170, PETRI_PLACES=51, PETRI_TRANSITIONS=53} [2024-11-13 13:46:26,584 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 5 predicate places. [2024-11-13 13:46:26,584 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 53 transitions, 170 flow [2024-11-13 13:46:26,584 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states 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 13:46:26,585 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:46:26,585 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:46:26,585 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-13 13:46:26,585 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-13 13:46:26,585 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:46:26,586 INFO L85 PathProgramCache]: Analyzing trace with hash 2132554309, now seen corresponding path program 1 times [2024-11-13 13:46:26,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:46:26,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267727904] [2024-11-13 13:46:26,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:46:26,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:46:26,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:46:26,707 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 13:46:26,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:46:26,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267727904] [2024-11-13 13:46:26,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267727904] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 13:46:26,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 13:46:26,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 13:46:26,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116447052] [2024-11-13 13:46:26,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 13:46:26,709 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 13:46:26,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:46:26,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 13:46:26,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-13 13:46:26,757 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 48 [2024-11-13 13:46:26,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 53 transitions, 170 flow. Second operand has 5 states, 5 states have (on average 24.4) internal successors, (122), 5 states have internal predecessors, (122), 0 states have call successors, (0), 0 states 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 13:46:26,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:46:26,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 48 [2024-11-13 13:46:26,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:46:26,945 INFO L124 PetriNetUnfolderBase]: 263/630 cut-off events. [2024-11-13 13:46:26,945 INFO L125 PetriNetUnfolderBase]: For 31/31 co-relation queries the response was YES. [2024-11-13 13:46:26,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1144 conditions, 630 events. 263/630 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 3544 event pairs, 123 based on Foata normal form. 8/431 useless extension candidates. Maximal degree in co-relation 672. Up to 263 conditions per place. [2024-11-13 13:46:26,954 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 42 selfloop transitions, 8 changer transitions 0/66 dead transitions. [2024-11-13 13:46:26,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 66 transitions, 300 flow [2024-11-13 13:46:26,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 13:46:26,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-13 13:46:26,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 155 transitions. [2024-11-13 13:46:26,958 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6458333333333334 [2024-11-13 13:46:26,958 INFO L175 Difference]: Start difference. First operand has 51 places, 53 transitions, 170 flow. Second operand 5 states and 155 transitions. [2024-11-13 13:46:26,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 66 transitions, 300 flow [2024-11-13 13:46:26,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 66 transitions, 295 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-13 13:46:26,965 INFO L231 Difference]: Finished difference. Result has 54 places, 53 transitions, 185 flow [2024-11-13 13:46:26,966 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=185, PETRI_PLACES=54, PETRI_TRANSITIONS=53} [2024-11-13 13:46:26,966 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 8 predicate places. [2024-11-13 13:46:26,966 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 53 transitions, 185 flow [2024-11-13 13:46:26,967 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.4) internal successors, (122), 5 states have internal predecessors, (122), 0 states have call successors, (0), 0 states 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 13:46:26,967 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:46:26,967 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:46:26,967 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-13 13:46:26,967 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-13 13:46:26,967 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:46:26,967 INFO L85 PathProgramCache]: Analyzing trace with hash -1487779180, now seen corresponding path program 1 times [2024-11-13 13:46:26,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:46:26,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078629223] [2024-11-13 13:46:26,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:46:26,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:46:26,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:46:27,062 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 13:46:27,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:46:27,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078629223] [2024-11-13 13:46:27,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078629223] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 13:46:27,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 13:46:27,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 13:46:27,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105560301] [2024-11-13 13:46:27,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 13:46:27,064 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 13:46:27,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:46:27,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 13:46:27,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 13:46:27,121 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 48 [2024-11-13 13:46:27,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 53 transitions, 185 flow. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states 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 13:46:27,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:46:27,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 48 [2024-11-13 13:46:27,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:46:27,266 INFO L124 PetriNetUnfolderBase]: 289/658 cut-off events. [2024-11-13 13:46:27,267 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2024-11-13 13:46:27,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1243 conditions, 658 events. 289/658 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3733 event pairs, 162 based on Foata normal form. 0/523 useless extension candidates. Maximal degree in co-relation 519. Up to 475 conditions per place. [2024-11-13 13:46:27,271 INFO L140 encePairwiseOnDemand]: 44/48 looper letters, 33 selfloop transitions, 5 changer transitions 0/51 dead transitions. [2024-11-13 13:46:27,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 51 transitions, 257 flow [2024-11-13 13:46:27,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 13:46:27,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-13 13:46:27,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 98 transitions. [2024-11-13 13:46:27,275 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5104166666666666 [2024-11-13 13:46:27,276 INFO L175 Difference]: Start difference. First operand has 54 places, 53 transitions, 185 flow. Second operand 4 states and 98 transitions. [2024-11-13 13:46:27,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 51 transitions, 257 flow [2024-11-13 13:46:27,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 51 transitions, 250 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-13 13:46:27,278 INFO L231 Difference]: Finished difference. Result has 53 places, 51 transitions, 184 flow [2024-11-13 13:46:27,278 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=184, PETRI_PLACES=53, PETRI_TRANSITIONS=51} [2024-11-13 13:46:27,279 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 7 predicate places. [2024-11-13 13:46:27,279 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 51 transitions, 184 flow [2024-11-13 13:46:27,280 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states 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 13:46:27,280 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:46:27,280 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:46:27,280 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-13 13:46:27,280 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-13 13:46:27,280 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:46:27,281 INFO L85 PathProgramCache]: Analyzing trace with hash -1487779179, now seen corresponding path program 1 times [2024-11-13 13:46:27,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:46:27,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329451715] [2024-11-13 13:46:27,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:46:27,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:46:27,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:46:27,370 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 13:46:27,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:46:27,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329451715] [2024-11-13 13:46:27,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329451715] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 13:46:27,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 13:46:27,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 13:46:27,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793367426] [2024-11-13 13:46:27,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 13:46:27,372 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 13:46:27,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:46:27,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 13:46:27,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 13:46:27,396 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 48 [2024-11-13 13:46:27,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 51 transitions, 184 flow. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states 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 13:46:27,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:46:27,397 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 48 [2024-11-13 13:46:27,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:46:27,537 INFO L124 PetriNetUnfolderBase]: 215/441 cut-off events. [2024-11-13 13:46:27,537 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-11-13 13:46:27,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 901 conditions, 441 events. 215/441 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2114 event pairs, 124 based on Foata normal form. 0/332 useless extension candidates. Maximal degree in co-relation 482. Up to 274 conditions per place. [2024-11-13 13:46:27,540 INFO L140 encePairwiseOnDemand]: 42/48 looper letters, 50 selfloop transitions, 5 changer transitions 0/69 dead transitions. [2024-11-13 13:46:27,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 69 transitions, 352 flow [2024-11-13 13:46:27,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 13:46:27,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-13 13:46:27,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 159 transitions. [2024-11-13 13:46:27,541 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6625 [2024-11-13 13:46:27,541 INFO L175 Difference]: Start difference. First operand has 53 places, 51 transitions, 184 flow. Second operand 5 states and 159 transitions. [2024-11-13 13:46:27,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 69 transitions, 352 flow [2024-11-13 13:46:27,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 69 transitions, 344 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-13 13:46:27,544 INFO L231 Difference]: Finished difference. Result has 56 places, 51 transitions, 192 flow [2024-11-13 13:46:27,545 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=192, PETRI_PLACES=56, PETRI_TRANSITIONS=51} [2024-11-13 13:46:27,545 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 10 predicate places. [2024-11-13 13:46:27,545 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 51 transitions, 192 flow [2024-11-13 13:46:27,546 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states 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 13:46:27,546 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:46:27,546 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:46:27,546 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-13 13:46:27,546 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-13 13:46:27,546 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:46:27,547 INFO L85 PathProgramCache]: Analyzing trace with hash 678699311, now seen corresponding path program 1 times [2024-11-13 13:46:27,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:46:27,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966352937] [2024-11-13 13:46:27,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:46:27,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:46:27,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:46:27,635 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 13:46:27,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:46:27,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966352937] [2024-11-13 13:46:27,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966352937] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 13:46:27,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 13:46:27,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 13:46:27,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538116229] [2024-11-13 13:46:27,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 13:46:27,636 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 13:46:27,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:46:27,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 13:46:27,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-13 13:46:27,660 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 48 [2024-11-13 13:46:27,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 51 transitions, 192 flow. Second operand has 5 states, 5 states have (on average 24.8) internal successors, (124), 5 states have internal predecessors, (124), 0 states have call successors, (0), 0 states 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 13:46:27,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:46:27,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 48 [2024-11-13 13:46:27,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:46:27,834 INFO L124 PetriNetUnfolderBase]: 254/536 cut-off events. [2024-11-13 13:46:27,834 INFO L125 PetriNetUnfolderBase]: For 44/44 co-relation queries the response was YES. [2024-11-13 13:46:27,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1078 conditions, 536 events. 254/536 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2596 event pairs, 107 based on Foata normal form. 5/422 useless extension candidates. Maximal degree in co-relation 798. Up to 205 conditions per place. [2024-11-13 13:46:27,838 INFO L140 encePairwiseOnDemand]: 42/48 looper letters, 52 selfloop transitions, 9 changer transitions 0/75 dead transitions. [2024-11-13 13:46:27,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 75 transitions, 370 flow [2024-11-13 13:46:27,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 13:46:27,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-13 13:46:27,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 166 transitions. [2024-11-13 13:46:27,839 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6916666666666667 [2024-11-13 13:46:27,839 INFO L175 Difference]: Start difference. First operand has 56 places, 51 transitions, 192 flow. Second operand 5 states and 166 transitions. [2024-11-13 13:46:27,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 75 transitions, 370 flow [2024-11-13 13:46:27,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 75 transitions, 362 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-13 13:46:27,842 INFO L231 Difference]: Finished difference. Result has 59 places, 52 transitions, 217 flow [2024-11-13 13:46:27,842 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=217, PETRI_PLACES=59, PETRI_TRANSITIONS=52} [2024-11-13 13:46:27,843 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 13 predicate places. [2024-11-13 13:46:27,843 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 52 transitions, 217 flow [2024-11-13 13:46:27,843 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.8) internal successors, (124), 5 states have internal predecessors, (124), 0 states have call successors, (0), 0 states 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 13:46:27,843 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:46:27,843 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:46:27,843 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-13 13:46:27,843 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-13 13:46:27,844 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:46:27,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1801949594, now seen corresponding path program 1 times [2024-11-13 13:46:27,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:46:27,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453176321] [2024-11-13 13:46:27,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:46:27,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:46:27,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:46:27,970 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 13:46:27,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:46:27,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453176321] [2024-11-13 13:46:27,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453176321] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 13:46:27,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 13:46:27,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 13:46:27,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517927147] [2024-11-13 13:46:27,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 13:46:27,971 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 13:46:27,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:46:27,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 13:46:27,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-13 13:46:28,021 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 48 [2024-11-13 13:46:28,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 52 transitions, 217 flow. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states 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 13:46:28,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:46:28,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 48 [2024-11-13 13:46:28,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:46:28,155 INFO L124 PetriNetUnfolderBase]: 267/573 cut-off events. [2024-11-13 13:46:28,156 INFO L125 PetriNetUnfolderBase]: For 74/74 co-relation queries the response was YES. [2024-11-13 13:46:28,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1216 conditions, 573 events. 267/573 cut-off events. For 74/74 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 2877 event pairs, 175 based on Foata normal form. 0/512 useless extension candidates. Maximal degree in co-relation 783. Up to 455 conditions per place. [2024-11-13 13:46:28,161 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 31 selfloop transitions, 8 changer transitions 0/50 dead transitions. [2024-11-13 13:46:28,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 50 transitions, 291 flow [2024-11-13 13:46:28,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 13:46:28,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-13 13:46:28,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 116 transitions. [2024-11-13 13:46:28,163 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.48333333333333334 [2024-11-13 13:46:28,163 INFO L175 Difference]: Start difference. First operand has 59 places, 52 transitions, 217 flow. Second operand 5 states and 116 transitions. [2024-11-13 13:46:28,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 50 transitions, 291 flow [2024-11-13 13:46:28,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 50 transitions, 282 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-13 13:46:28,165 INFO L231 Difference]: Finished difference. Result has 59 places, 50 transitions, 220 flow [2024-11-13 13:46:28,165 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=220, PETRI_PLACES=59, PETRI_TRANSITIONS=50} [2024-11-13 13:46:28,167 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 13 predicate places. [2024-11-13 13:46:28,168 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 50 transitions, 220 flow [2024-11-13 13:46:28,168 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states 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 13:46:28,168 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:46:28,168 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:46:28,168 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-13 13:46:28,169 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-13 13:46:28,169 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:46:28,169 INFO L85 PathProgramCache]: Analyzing trace with hash -1801949593, now seen corresponding path program 1 times [2024-11-13 13:46:28,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:46:28,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744555813] [2024-11-13 13:46:28,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:46:28,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:46:28,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:46:28,463 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 13:46:28,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:46:28,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744555813] [2024-11-13 13:46:28,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744555813] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:46:28,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440740624] [2024-11-13 13:46:28,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:46:28,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:46:28,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:46:28,466 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:46:28,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-13 13:46:28,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:46:28,558 INFO L255 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-13 13:46:28,560 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:46:28,586 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 13:46:28,591 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 13:46:28,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 13:46:28,675 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 13:46:28,695 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-13 13:46:28,695 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 13:46:28,761 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 13:46:28,761 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:46:29,040 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 13:46:29,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440740624] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-13 13:46:29,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-13 13:46:29,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 9 [2024-11-13 13:46:29,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460183926] [2024-11-13 13:46:29,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 13:46:29,043 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 13:46:29,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:46:29,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 13:46:29,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-11-13 13:46:29,229 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2024-11-13 13:46:29,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 50 transitions, 220 flow. Second operand has 5 states, 5 states have (on average 23.8) internal successors, (119), 5 states have internal predecessors, (119), 0 states have call successors, (0), 0 states 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 13:46:29,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:46:29,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2024-11-13 13:46:29,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:46:29,455 INFO L124 PetriNetUnfolderBase]: 295/612 cut-off events. [2024-11-13 13:46:29,455 INFO L125 PetriNetUnfolderBase]: For 85/85 co-relation queries the response was YES. [2024-11-13 13:46:29,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1303 conditions, 612 events. 295/612 cut-off events. For 85/85 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2960 event pairs, 194 based on Foata normal form. 0/501 useless extension candidates. Maximal degree in co-relation 865. Up to 283 conditions per place. [2024-11-13 13:46:29,460 INFO L140 encePairwiseOnDemand]: 42/48 looper letters, 54 selfloop transitions, 7 changer transitions 0/72 dead transitions. [2024-11-13 13:46:29,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 72 transitions, 414 flow [2024-11-13 13:46:29,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 13:46:29,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-13 13:46:29,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 155 transitions. [2024-11-13 13:46:29,462 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6458333333333334 [2024-11-13 13:46:29,462 INFO L175 Difference]: Start difference. First operand has 59 places, 50 transitions, 220 flow. Second operand 5 states and 155 transitions. [2024-11-13 13:46:29,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 72 transitions, 414 flow [2024-11-13 13:46:29,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 72 transitions, 400 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-13 13:46:29,465 INFO L231 Difference]: Finished difference. Result has 62 places, 51 transitions, 236 flow [2024-11-13 13:46:29,468 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=236, PETRI_PLACES=62, PETRI_TRANSITIONS=51} [2024-11-13 13:46:29,468 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 16 predicate places. [2024-11-13 13:46:29,469 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 51 transitions, 236 flow [2024-11-13 13:46:29,469 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.8) internal successors, (119), 5 states have internal predecessors, (119), 0 states have call successors, (0), 0 states 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 13:46:29,469 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:46:29,469 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:46:29,491 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-13 13:46:29,670 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:46:29,671 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-13 13:46:29,671 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:46:29,671 INFO L85 PathProgramCache]: Analyzing trace with hash -25862149, now seen corresponding path program 1 times [2024-11-13 13:46:29,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:46:29,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339473496] [2024-11-13 13:46:29,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:46:29,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:46:29,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:46:29,911 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 13:46:29,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:46:29,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339473496] [2024-11-13 13:46:29,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339473496] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:46:29,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121118775] [2024-11-13 13:46:29,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:46:29,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:46:29,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:46:29,916 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:46:29,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-13 13:46:30,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:46:30,003 INFO L255 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-13 13:46:30,005 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:46:30,023 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 13:46:30,128 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 13:46:30,128 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:46:30,284 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 13:46:30,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121118775] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-13 13:46:30,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-13 13:46:30,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 10 [2024-11-13 13:46:30,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881067788] [2024-11-13 13:46:30,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 13:46:30,285 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-13 13:46:30,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:46:30,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-13 13:46:30,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2024-11-13 13:46:30,399 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2024-11-13 13:46:30,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 51 transitions, 236 flow. Second operand has 6 states, 6 states have (on average 23.5) internal successors, (141), 6 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:46:30,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:46:30,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2024-11-13 13:46:30,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:46:30,683 INFO L124 PetriNetUnfolderBase]: 375/764 cut-off events. [2024-11-13 13:46:30,683 INFO L125 PetriNetUnfolderBase]: For 175/175 co-relation queries the response was YES. [2024-11-13 13:46:30,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1724 conditions, 764 events. 375/764 cut-off events. For 175/175 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 3775 event pairs, 130 based on Foata normal form. 0/688 useless extension candidates. Maximal degree in co-relation 1283. Up to 226 conditions per place. [2024-11-13 13:46:30,689 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 65 selfloop transitions, 13 changer transitions 0/90 dead transitions. [2024-11-13 13:46:30,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 90 transitions, 492 flow [2024-11-13 13:46:30,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-13 13:46:30,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-13 13:46:30,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 222 transitions. [2024-11-13 13:46:30,691 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6607142857142857 [2024-11-13 13:46:30,691 INFO L175 Difference]: Start difference. First operand has 62 places, 51 transitions, 236 flow. Second operand 7 states and 222 transitions. [2024-11-13 13:46:30,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 90 transitions, 492 flow [2024-11-13 13:46:30,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 90 transitions, 481 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-13 13:46:30,694 INFO L231 Difference]: Finished difference. Result has 67 places, 53 transitions, 270 flow [2024-11-13 13:46:30,694 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=270, PETRI_PLACES=67, PETRI_TRANSITIONS=53} [2024-11-13 13:46:30,695 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 21 predicate places. [2024-11-13 13:46:30,695 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 53 transitions, 270 flow [2024-11-13 13:46:30,695 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.5) internal successors, (141), 6 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:46:30,695 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:46:30,695 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:46:30,715 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-13 13:46:30,896 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-13 13:46:30,896 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-13 13:46:30,897 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:46:30,897 INFO L85 PathProgramCache]: Analyzing trace with hash -808330992, now seen corresponding path program 1 times [2024-11-13 13:46:30,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:46:30,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368163695] [2024-11-13 13:46:30,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:46:30,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:46:30,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:46:31,131 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 13:46:31,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:46:31,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368163695] [2024-11-13 13:46:31,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368163695] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:46:31,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008395876] [2024-11-13 13:46:31,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:46:31,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:46:31,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:46:31,134 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:46:31,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-13 13:46:31,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:46:31,222 INFO L255 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-13 13:46:31,223 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:46:31,341 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 13:46:31,342 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:46:31,411 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 29 treesize of output 25 [2024-11-13 13:46:31,453 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 13:46:31,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008395876] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:46:31,453 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 13:46:31,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2024-11-13 13:46:31,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676210234] [2024-11-13 13:46:31,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 13:46:31,454 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-13 13:46:31,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:46:31,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-13 13:46:31,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2024-11-13 13:46:31,783 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2024-11-13 13:46:31,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 53 transitions, 270 flow. Second operand has 12 states, 12 states have (on average 24.25) internal successors, (291), 12 states have internal predecessors, (291), 0 states have call successors, (0), 0 states 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 13:46:31,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:46:31,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2024-11-13 13:46:31,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:46:32,150 INFO L124 PetriNetUnfolderBase]: 429/888 cut-off events. [2024-11-13 13:46:32,150 INFO L125 PetriNetUnfolderBase]: For 493/553 co-relation queries the response was YES. [2024-11-13 13:46:32,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2043 conditions, 888 events. 429/888 cut-off events. For 493/553 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 4613 event pairs, 162 based on Foata normal form. 0/803 useless extension candidates. Maximal degree in co-relation 1593. Up to 288 conditions per place. [2024-11-13 13:46:32,156 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 61 selfloop transitions, 13 changer transitions 0/87 dead transitions. [2024-11-13 13:46:32,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 87 transitions, 520 flow [2024-11-13 13:46:32,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-13 13:46:32,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-13 13:46:32,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 218 transitions. [2024-11-13 13:46:32,159 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6488095238095238 [2024-11-13 13:46:32,159 INFO L175 Difference]: Start difference. First operand has 67 places, 53 transitions, 270 flow. Second operand 7 states and 218 transitions. [2024-11-13 13:46:32,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 87 transitions, 520 flow [2024-11-13 13:46:32,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 87 transitions, 505 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-13 13:46:32,163 INFO L231 Difference]: Finished difference. Result has 73 places, 54 transitions, 294 flow [2024-11-13 13:46:32,163 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=255, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=294, PETRI_PLACES=73, PETRI_TRANSITIONS=54} [2024-11-13 13:46:32,164 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 27 predicate places. [2024-11-13 13:46:32,164 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 54 transitions, 294 flow [2024-11-13 13:46:32,164 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 24.25) internal successors, (291), 12 states have internal predecessors, (291), 0 states have call successors, (0), 0 states 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 13:46:32,164 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:46:32,164 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:46:32,184 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-13 13:46:32,365 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-13 13:46:32,365 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-13 13:46:32,365 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:46:32,365 INFO L85 PathProgramCache]: Analyzing trace with hash 711543422, now seen corresponding path program 1 times [2024-11-13 13:46:32,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:46:32,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487092370] [2024-11-13 13:46:32,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:46:32,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:46:32,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:46:32,624 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 13:46:32,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:46:32,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487092370] [2024-11-13 13:46:32,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487092370] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:46:32,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260981022] [2024-11-13 13:46:32,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:46:32,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:46:32,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:46:32,626 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:46:32,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-13 13:46:32,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:46:32,711 INFO L255 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-13 13:46:32,713 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:46:32,726 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 13:46:32,796 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-13 13:46:32,797 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 13:46:32,805 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 13:46:32,924 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 13:46:32,924 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:46:33,092 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 61 treesize of output 57 [2024-11-13 13:46:33,169 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 13:46:33,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260981022] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:46:33,169 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 13:46:33,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 3] total 10 [2024-11-13 13:46:33,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315619033] [2024-11-13 13:46:33,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 13:46:33,170 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-13 13:46:33,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:46:33,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-13 13:46:33,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-11-13 13:46:37,458 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-13 13:46:41,308 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.82s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-13 13:46:45,347 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-13 13:46:49,613 WARN L539 Checker$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 13:46:49,613 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 48 [2024-11-13 13:46:49,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 54 transitions, 294 flow. Second operand has 12 states, 12 states have (on average 21.75) internal successors, (261), 12 states have internal predecessors, (261), 0 states have call successors, (0), 0 states 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 13:46:49,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:46:49,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 48 [2024-11-13 13:46:49,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:46:50,091 INFO L124 PetriNetUnfolderBase]: 429/835 cut-off events. [2024-11-13 13:46:50,092 INFO L125 PetriNetUnfolderBase]: For 595/655 co-relation queries the response was YES. [2024-11-13 13:46:50,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2038 conditions, 835 events. 429/835 cut-off events. For 595/655 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 4167 event pairs, 230 based on Foata normal form. 0/778 useless extension candidates. Maximal degree in co-relation 1581. Up to 323 conditions per place. [2024-11-13 13:46:50,098 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 58 selfloop transitions, 15 changer transitions 0/87 dead transitions. [2024-11-13 13:46:50,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 87 transitions, 566 flow [2024-11-13 13:46:50,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-13 13:46:50,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-13 13:46:50,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 214 transitions. [2024-11-13 13:46:50,100 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5572916666666666 [2024-11-13 13:46:50,100 INFO L175 Difference]: Start difference. First operand has 73 places, 54 transitions, 294 flow. Second operand 8 states and 214 transitions. [2024-11-13 13:46:50,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 87 transitions, 566 flow [2024-11-13 13:46:50,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 87 transitions, 533 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-11-13 13:46:50,103 INFO L231 Difference]: Finished difference. Result has 78 places, 57 transitions, 330 flow [2024-11-13 13:46:50,104 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=263, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=330, PETRI_PLACES=78, PETRI_TRANSITIONS=57} [2024-11-13 13:46:50,104 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 32 predicate places. [2024-11-13 13:46:50,104 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 57 transitions, 330 flow [2024-11-13 13:46:50,104 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 21.75) internal successors, (261), 12 states have internal predecessors, (261), 0 states have call successors, (0), 0 states 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 13:46:50,104 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:46:50,104 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:46:50,124 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-13 13:46:50,305 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:46:50,305 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-13 13:46:50,305 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:46:50,305 INFO L85 PathProgramCache]: Analyzing trace with hash -1659748884, now seen corresponding path program 1 times [2024-11-13 13:46:50,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:46:50,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035632387] [2024-11-13 13:46:50,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:46:50,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:46:50,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:46:50,424 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 13:46:50,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:46:50,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035632387] [2024-11-13 13:46:50,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035632387] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:46:50,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572868711] [2024-11-13 13:46:50,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:46:50,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:46:50,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:46:50,428 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:46:50,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-13 13:46:50,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:46:50,515 INFO L255 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-13 13:46:50,516 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:46:50,624 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 13:46:50,624 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:46:50,724 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 13:46:50,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572868711] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:46:50,725 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 13:46:50,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 14 [2024-11-13 13:46:50,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002110004] [2024-11-13 13:46:50,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 13:46:50,725 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-13 13:46:50,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:46:50,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-13 13:46:50,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2024-11-13 13:46:50,930 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 48 [2024-11-13 13:46:50,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 57 transitions, 330 flow. Second operand has 15 states, 15 states have (on average 25.0) internal successors, (375), 15 states have internal predecessors, (375), 0 states have call successors, (0), 0 states 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 13:46:50,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:46:50,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 48 [2024-11-13 13:46:50,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:46:51,806 INFO L124 PetriNetUnfolderBase]: 1085/2176 cut-off events. [2024-11-13 13:46:51,807 INFO L125 PetriNetUnfolderBase]: For 2178/2403 co-relation queries the response was YES. [2024-11-13 13:46:51,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5488 conditions, 2176 events. 1085/2176 cut-off events. For 2178/2403 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 13960 event pairs, 674 based on Foata normal form. 54/2067 useless extension candidates. Maximal degree in co-relation 2905. Up to 553 conditions per place. [2024-11-13 13:46:51,820 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 158 selfloop transitions, 32 changer transitions 0/206 dead transitions. [2024-11-13 13:46:51,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 206 transitions, 1228 flow [2024-11-13 13:46:51,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-13 13:46:51,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-11-13 13:46:51,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 806 transitions. [2024-11-13 13:46:51,823 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6219135802469136 [2024-11-13 13:46:51,824 INFO L175 Difference]: Start difference. First operand has 78 places, 57 transitions, 330 flow. Second operand 27 states and 806 transitions. [2024-11-13 13:46:51,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 206 transitions, 1228 flow [2024-11-13 13:46:51,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 206 transitions, 1196 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-11-13 13:46:51,833 INFO L231 Difference]: Finished difference. Result has 104 places, 70 transitions, 482 flow [2024-11-13 13:46:51,834 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=482, PETRI_PLACES=104, PETRI_TRANSITIONS=70} [2024-11-13 13:46:51,835 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 58 predicate places. [2024-11-13 13:46:51,836 INFO L471 AbstractCegarLoop]: Abstraction has has 104 places, 70 transitions, 482 flow [2024-11-13 13:46:51,837 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 25.0) internal successors, (375), 15 states have internal predecessors, (375), 0 states have call successors, (0), 0 states 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 13:46:51,837 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:46:51,837 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:46:51,856 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-13 13:46:52,037 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:46:52,038 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-13 13:46:52,038 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:46:52,038 INFO L85 PathProgramCache]: Analyzing trace with hash 1926876949, now seen corresponding path program 1 times [2024-11-13 13:46:52,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:46:52,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811118617] [2024-11-13 13:46:52,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:46:52,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:46:52,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:46:52,163 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 13:46:52,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:46:52,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811118617] [2024-11-13 13:46:52,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811118617] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:46:52,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474676366] [2024-11-13 13:46:52,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:46:52,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:46:52,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:46:52,166 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:46:52,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-13 13:46:52,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:46:52,255 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-13 13:46:52,257 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:46:52,378 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 13:46:52,379 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:46:52,469 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 13:46:52,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474676366] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:46:52,469 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 13:46:52,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 14 [2024-11-13 13:46:52,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351911639] [2024-11-13 13:46:52,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 13:46:52,471 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-13 13:46:52,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:46:52,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-13 13:46:52,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2024-11-13 13:46:52,715 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 48 [2024-11-13 13:46:52,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 70 transitions, 482 flow. Second operand has 15 states, 15 states have (on average 25.6) internal successors, (384), 15 states have internal predecessors, (384), 0 states have call successors, (0), 0 states 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 13:46:52,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:46:52,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 48 [2024-11-13 13:46:52,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:46:53,518 INFO L124 PetriNetUnfolderBase]: 901/1846 cut-off events. [2024-11-13 13:46:53,518 INFO L125 PetriNetUnfolderBase]: For 2563/2875 co-relation queries the response was YES. [2024-11-13 13:46:53,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4734 conditions, 1846 events. 901/1846 cut-off events. For 2563/2875 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 11451 event pairs, 413 based on Foata normal form. 42/1797 useless extension candidates. Maximal degree in co-relation 2554. Up to 320 conditions per place. [2024-11-13 13:46:53,530 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 172 selfloop transitions, 29 changer transitions 0/217 dead transitions. [2024-11-13 13:46:53,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 217 transitions, 1322 flow [2024-11-13 13:46:53,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-13 13:46:53,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-11-13 13:46:53,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 800 transitions. [2024-11-13 13:46:53,533 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6410256410256411 [2024-11-13 13:46:53,534 INFO L175 Difference]: Start difference. First operand has 104 places, 70 transitions, 482 flow. Second operand 26 states and 800 transitions. [2024-11-13 13:46:53,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 217 transitions, 1322 flow [2024-11-13 13:46:53,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 217 transitions, 1299 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-13 13:46:53,541 INFO L231 Difference]: Finished difference. Result has 127 places, 76 transitions, 577 flow [2024-11-13 13:46:53,541 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=459, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=577, PETRI_PLACES=127, PETRI_TRANSITIONS=76} [2024-11-13 13:46:53,542 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 81 predicate places. [2024-11-13 13:46:53,543 INFO L471 AbstractCegarLoop]: Abstraction has has 127 places, 76 transitions, 577 flow [2024-11-13 13:46:53,543 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 25.6) internal successors, (384), 15 states have internal predecessors, (384), 0 states have call successors, (0), 0 states 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 13:46:53,543 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:46:53,543 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 13:46:53,563 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-13 13:46:53,743 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-13 13:46:53,744 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-13 13:46:53,745 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:46:53,745 INFO L85 PathProgramCache]: Analyzing trace with hash -1287670083, now seen corresponding path program 1 times [2024-11-13 13:46:53,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:46:53,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841368100] [2024-11-13 13:46:53,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:46:53,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:46:53,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:46:53,850 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 13:46:53,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:46:53,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841368100] [2024-11-13 13:46:53,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841368100] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 13:46:53,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 13:46:53,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-13 13:46:53,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184385872] [2024-11-13 13:46:53,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 13:46:53,855 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 13:46:53,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:46:53,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 13:46:53,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 13:46:53,884 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 48 [2024-11-13 13:46:53,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 76 transitions, 577 flow. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states 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 13:46:53,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:46:53,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 48 [2024-11-13 13:46:53,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:46:54,130 INFO L124 PetriNetUnfolderBase]: 783/1640 cut-off events. [2024-11-13 13:46:54,130 INFO L125 PetriNetUnfolderBase]: For 3254/3603 co-relation queries the response was YES. [2024-11-13 13:46:54,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4321 conditions, 1640 events. 783/1640 cut-off events. For 3254/3603 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 10104 event pairs, 293 based on Foata normal form. 9/1542 useless extension candidates. Maximal degree in co-relation 2223. Up to 904 conditions per place. [2024-11-13 13:46:54,140 INFO L140 encePairwiseOnDemand]: 44/48 looper letters, 56 selfloop transitions, 9 changer transitions 13/95 dead transitions. [2024-11-13 13:46:54,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 95 transitions, 856 flow [2024-11-13 13:46:54,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 13:46:54,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-13 13:46:54,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 108 transitions. [2024-11-13 13:46:54,142 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.75 [2024-11-13 13:46:54,142 INFO L175 Difference]: Start difference. First operand has 127 places, 76 transitions, 577 flow. Second operand 3 states and 108 transitions. [2024-11-13 13:46:54,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 95 transitions, 856 flow [2024-11-13 13:46:54,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 95 transitions, 823 flow, removed 1 selfloop flow, removed 10 redundant places. [2024-11-13 13:46:54,150 INFO L231 Difference]: Finished difference. Result has 120 places, 72 transitions, 553 flow [2024-11-13 13:46:54,150 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=545, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=553, PETRI_PLACES=120, PETRI_TRANSITIONS=72} [2024-11-13 13:46:54,150 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 74 predicate places. [2024-11-13 13:46:54,151 INFO L471 AbstractCegarLoop]: Abstraction has has 120 places, 72 transitions, 553 flow [2024-11-13 13:46:54,151 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states 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 13:46:54,151 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:46:54,151 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:46:54,151 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-13 13:46:54,151 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-13 13:46:54,152 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:46:54,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1556760089, now seen corresponding path program 2 times [2024-11-13 13:46:54,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:46:54,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979027575] [2024-11-13 13:46:54,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:46:54,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:46:54,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:46:54,488 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 13:46:54,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:46:54,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979027575] [2024-11-13 13:46:54,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979027575] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:46:54,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135199683] [2024-11-13 13:46:54,489 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 13:46:54,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:46:54,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:46:54,491 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:46:54,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-13 13:46:54,597 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 13:46:54,597 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 13:46:54,598 INFO L255 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-13 13:46:54,600 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:46:54,610 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 13:46:54,616 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 13:46:54,735 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-13 13:46:54,735 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2024-11-13 13:46:54,756 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-13 13:46:54,756 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 13:46:54,910 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 13:46:54,910 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:46:55,320 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-13 13:46:55,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135199683] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:46:55,320 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 13:46:55,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 5] total 16 [2024-11-13 13:46:55,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830545398] [2024-11-13 13:46:55,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 13:46:55,321 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-13 13:46:55,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:46:55,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-13 13:46:55,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2024-11-13 13:46:56,424 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 48 [2024-11-13 13:46:56,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 72 transitions, 553 flow. Second operand has 18 states, 18 states have (on average 20.166666666666668) internal successors, (363), 18 states have internal predecessors, (363), 0 states have call successors, (0), 0 states 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 13:46:56,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:46:56,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 48 [2024-11-13 13:46:56,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:46:57,491 INFO L124 PetriNetUnfolderBase]: 1066/2127 cut-off events. [2024-11-13 13:46:57,492 INFO L125 PetriNetUnfolderBase]: For 4568/4738 co-relation queries the response was YES. [2024-11-13 13:46:57,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5878 conditions, 2127 events. 1066/2127 cut-off events. For 4568/4738 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 13271 event pairs, 483 based on Foata normal form. 22/1986 useless extension candidates. Maximal degree in co-relation 3801. Up to 672 conditions per place. [2024-11-13 13:46:57,509 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 79 selfloop transitions, 25 changer transitions 0/118 dead transitions. [2024-11-13 13:46:57,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 118 transitions, 956 flow [2024-11-13 13:46:57,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-13 13:46:57,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-13 13:46:57,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 283 transitions. [2024-11-13 13:46:57,510 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5359848484848485 [2024-11-13 13:46:57,510 INFO L175 Difference]: Start difference. First operand has 120 places, 72 transitions, 553 flow. Second operand 11 states and 283 transitions. [2024-11-13 13:46:57,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 118 transitions, 956 flow [2024-11-13 13:46:57,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 118 transitions, 885 flow, removed 4 selfloop flow, removed 13 redundant places. [2024-11-13 13:46:57,519 INFO L231 Difference]: Finished difference. Result has 101 places, 76 transitions, 590 flow [2024-11-13 13:46:57,519 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=489, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=590, PETRI_PLACES=101, PETRI_TRANSITIONS=76} [2024-11-13 13:46:57,519 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 55 predicate places. [2024-11-13 13:46:57,519 INFO L471 AbstractCegarLoop]: Abstraction has has 101 places, 76 transitions, 590 flow [2024-11-13 13:46:57,520 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 20.166666666666668) internal successors, (363), 18 states have internal predecessors, (363), 0 states have call successors, (0), 0 states 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 13:46:57,520 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:46:57,520 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:46:57,539 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-13 13:46:57,720 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:46:57,721 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-13 13:46:57,721 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:46:57,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1014922117, now seen corresponding path program 1 times [2024-11-13 13:46:57,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:46:57,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096550591] [2024-11-13 13:46:57,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:46:57,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:46:57,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:46:58,008 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 13:46:58,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:46:58,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096550591] [2024-11-13 13:46:58,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096550591] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:46:58,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402661413] [2024-11-13 13:46:58,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:46:58,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:46:58,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:46:58,010 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:46:58,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-13 13:46:58,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:46:58,106 INFO L255 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-13 13:46:58,107 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:46:58,122 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 13:46:58,292 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 13:46:58,292 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:46:58,559 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-13 13:46:58,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402661413] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:46:58,560 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 13:46:58,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2024-11-13 13:46:58,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27433990] [2024-11-13 13:46:58,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 13:46:58,560 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-13 13:46:58,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:46:58,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-13 13:46:58,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2024-11-13 13:46:59,143 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2024-11-13 13:46:59,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 76 transitions, 590 flow. Second operand has 19 states, 19 states have (on average 21.894736842105264) internal successors, (416), 19 states have internal predecessors, (416), 0 states have call successors, (0), 0 states 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 13:46:59,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:46:59,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2024-11-13 13:46:59,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:46:59,777 INFO L124 PetriNetUnfolderBase]: 1098/2156 cut-off events. [2024-11-13 13:46:59,777 INFO L125 PetriNetUnfolderBase]: For 5249/5527 co-relation queries the response was YES. [2024-11-13 13:46:59,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6006 conditions, 2156 events. 1098/2156 cut-off events. For 5249/5527 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 13530 event pairs, 339 based on Foata normal form. 22/2070 useless extension candidates. Maximal degree in co-relation 3211. Up to 462 conditions per place. [2024-11-13 13:46:59,794 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 101 selfloop transitions, 25 changer transitions 0/142 dead transitions. [2024-11-13 13:46:59,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 142 transitions, 1064 flow [2024-11-13 13:46:59,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-13 13:46:59,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-13 13:46:59,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 303 transitions. [2024-11-13 13:46:59,796 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.63125 [2024-11-13 13:46:59,796 INFO L175 Difference]: Start difference. First operand has 101 places, 76 transitions, 590 flow. Second operand 10 states and 303 transitions. [2024-11-13 13:46:59,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 142 transitions, 1064 flow [2024-11-13 13:46:59,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 142 transitions, 1049 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-13 13:46:59,806 INFO L231 Difference]: Finished difference. Result has 109 places, 78 transitions, 656 flow [2024-11-13 13:46:59,806 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=575, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=656, PETRI_PLACES=109, PETRI_TRANSITIONS=78} [2024-11-13 13:46:59,806 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 63 predicate places. [2024-11-13 13:46:59,807 INFO L471 AbstractCegarLoop]: Abstraction has has 109 places, 78 transitions, 656 flow [2024-11-13 13:46:59,807 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 21.894736842105264) internal successors, (416), 19 states have internal predecessors, (416), 0 states have call successors, (0), 0 states 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 13:46:59,807 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:46:59,807 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:46:59,828 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-13 13:47:00,011 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:47:00,012 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-13 13:47:00,012 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:47:00,012 INFO L85 PathProgramCache]: Analyzing trace with hash 2114861136, now seen corresponding path program 2 times [2024-11-13 13:47:00,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:47:00,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059395365] [2024-11-13 13:47:00,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:47:00,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:47:00,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:47:00,295 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 13:47:00,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:47:00,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059395365] [2024-11-13 13:47:00,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059395365] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:47:00,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208737898] [2024-11-13 13:47:00,296 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 13:47:00,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:47:00,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:47:00,298 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:47:00,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-13 13:47:00,401 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 13:47:00,401 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 13:47:00,402 INFO L255 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-13 13:47:00,403 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:47:00,578 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 13:47:00,579 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:47:00,689 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 30 treesize of output 26 [2024-11-13 13:47:00,796 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 13:47:00,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208737898] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:47:00,797 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 13:47:00,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2024-11-13 13:47:00,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462582386] [2024-11-13 13:47:00,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 13:47:00,798 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-13 13:47:00,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:47:00,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-13 13:47:00,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2024-11-13 13:47:01,412 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2024-11-13 13:47:01,413 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 78 transitions, 656 flow. Second operand has 19 states, 19 states have (on average 24.210526315789473) internal successors, (460), 19 states have internal predecessors, (460), 0 states have call successors, (0), 0 states 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 13:47:01,413 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:47:01,413 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2024-11-13 13:47:01,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:47:02,020 INFO L124 PetriNetUnfolderBase]: 1477/3003 cut-off events. [2024-11-13 13:47:02,020 INFO L125 PetriNetUnfolderBase]: For 9950/10353 co-relation queries the response was YES. [2024-11-13 13:47:02,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8359 conditions, 3003 events. 1477/3003 cut-off events. For 9950/10353 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 20735 event pairs, 400 based on Foata normal form. 31/2901 useless extension candidates. Maximal degree in co-relation 4728. Up to 626 conditions per place. [2024-11-13 13:47:02,042 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 97 selfloop transitions, 25 changer transitions 0/140 dead transitions. [2024-11-13 13:47:02,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 140 transitions, 1203 flow [2024-11-13 13:47:02,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-13 13:47:02,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-13 13:47:02,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 315 transitions. [2024-11-13 13:47:02,044 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.65625 [2024-11-13 13:47:02,044 INFO L175 Difference]: Start difference. First operand has 109 places, 78 transitions, 656 flow. Second operand 10 states and 315 transitions. [2024-11-13 13:47:02,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 140 transitions, 1203 flow [2024-11-13 13:47:02,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 140 transitions, 1164 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-11-13 13:47:02,053 INFO L231 Difference]: Finished difference. Result has 117 places, 81 transitions, 708 flow [2024-11-13 13:47:02,055 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=621, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=708, PETRI_PLACES=117, PETRI_TRANSITIONS=81} [2024-11-13 13:47:02,056 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 71 predicate places. [2024-11-13 13:47:02,056 INFO L471 AbstractCegarLoop]: Abstraction has has 117 places, 81 transitions, 708 flow [2024-11-13 13:47:02,056 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 24.210526315789473) internal successors, (460), 19 states have internal predecessors, (460), 0 states have call successors, (0), 0 states 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 13:47:02,056 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:47:02,057 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:47:02,076 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-13 13:47:02,260 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:47:02,261 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-13 13:47:02,261 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:47:02,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1136186174, now seen corresponding path program 1 times [2024-11-13 13:47:02,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:47:02,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785862981] [2024-11-13 13:47:02,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:47:02,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:47:02,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:47:02,547 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 13:47:02,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:47:02,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785862981] [2024-11-13 13:47:02,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785862981] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:47:02,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050478533] [2024-11-13 13:47:02,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:47:02,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:47:02,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:47:02,550 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:47:02,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-13 13:47:02,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:47:02,649 INFO L255 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-13 13:47:02,651 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:47:02,661 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 13:47:02,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 13:47:02,767 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 13:47:02,779 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-13 13:47:02,779 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 13:47:02,912 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 13:47:02,912 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:47:03,104 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 61 treesize of output 57 [2024-11-13 13:47:03,272 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 13:47:03,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050478533] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:47:03,273 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 13:47:03,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2024-11-13 13:47:03,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166566724] [2024-11-13 13:47:03,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 13:47:03,273 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-13 13:47:03,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:47:03,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-13 13:47:03,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2024-11-13 13:47:04,049 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2024-11-13 13:47:04,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 81 transitions, 708 flow. Second operand has 17 states, 17 states have (on average 22.647058823529413) internal successors, (385), 17 states have internal predecessors, (385), 0 states have call successors, (0), 0 states 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 13:47:04,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:47:04,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2024-11-13 13:47:04,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:47:04,860 INFO L124 PetriNetUnfolderBase]: 1508/2932 cut-off events. [2024-11-13 13:47:04,861 INFO L125 PetriNetUnfolderBase]: For 9629/9944 co-relation queries the response was YES. [2024-11-13 13:47:04,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8446 conditions, 2932 events. 1508/2932 cut-off events. For 9629/9944 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 19872 event pairs, 712 based on Foata normal form. 31/2838 useless extension candidates. Maximal degree in co-relation 4894. Up to 924 conditions per place. [2024-11-13 13:47:04,873 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 79 selfloop transitions, 25 changer transitions 0/124 dead transitions. [2024-11-13 13:47:04,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 124 transitions, 1165 flow [2024-11-13 13:47:04,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-13 13:47:04,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-13 13:47:04,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 301 transitions. [2024-11-13 13:47:04,875 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5700757575757576 [2024-11-13 13:47:04,875 INFO L175 Difference]: Start difference. First operand has 117 places, 81 transitions, 708 flow. Second operand 11 states and 301 transitions. [2024-11-13 13:47:04,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 124 transitions, 1165 flow [2024-11-13 13:47:04,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 124 transitions, 1130 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-11-13 13:47:04,889 INFO L231 Difference]: Finished difference. Result has 125 places, 83 transitions, 754 flow [2024-11-13 13:47:04,890 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=673, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=754, PETRI_PLACES=125, PETRI_TRANSITIONS=83} [2024-11-13 13:47:04,890 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 79 predicate places. [2024-11-13 13:47:04,890 INFO L471 AbstractCegarLoop]: Abstraction has has 125 places, 83 transitions, 754 flow [2024-11-13 13:47:04,891 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 22.647058823529413) internal successors, (385), 17 states have internal predecessors, (385), 0 states have call successors, (0), 0 states 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 13:47:04,891 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:47:04,891 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-13 13:47:04,911 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-13 13:47:05,094 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-13 13:47:05,095 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-13 13:47:05,095 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:47:05,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1025362284, now seen corresponding path program 3 times [2024-11-13 13:47:05,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:47:05,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3452396] [2024-11-13 13:47:05,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:47:05,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:47:05,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:47:05,219 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-13 13:47:05,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:47:05,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3452396] [2024-11-13 13:47:05,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3452396] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:47:05,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239310308] [2024-11-13 13:47:05,219 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 13:47:05,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:47:05,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:47:05,221 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:47:05,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-13 13:47:05,325 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-13 13:47:05,325 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 13:47:05,327 INFO L255 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-13 13:47:05,328 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:47:05,336 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 13:47:05,399 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-13 13:47:05,399 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 13:47:05,404 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 13:47:05,538 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 13:47:05,539 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:47:05,825 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 13:47:05,890 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 13:47:05,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239310308] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:47:05,890 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 13:47:05,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 20 [2024-11-13 13:47:05,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265207815] [2024-11-13 13:47:05,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 13:47:05,891 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-13 13:47:05,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:47:05,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-13 13:47:05,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2024-11-13 13:47:06,756 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 48 [2024-11-13 13:47:06,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 83 transitions, 754 flow. Second operand has 21 states, 21 states have (on average 20.38095238095238) internal successors, (428), 21 states have internal predecessors, (428), 0 states have call successors, (0), 0 states 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 13:47:06,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:47:06,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 48 [2024-11-13 13:47:06,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:47:08,292 INFO L124 PetriNetUnfolderBase]: 3235/6486 cut-off events. [2024-11-13 13:47:08,293 INFO L125 PetriNetUnfolderBase]: For 19445/19449 co-relation queries the response was YES. [2024-11-13 13:47:08,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20433 conditions, 6486 events. 3235/6486 cut-off events. For 19445/19449 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 49116 event pairs, 889 based on Foata normal form. 68/6506 useless extension candidates. Maximal degree in co-relation 13263. Up to 968 conditions per place. [2024-11-13 13:47:08,326 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 204 selfloop transitions, 51 changer transitions 0/270 dead transitions. [2024-11-13 13:47:08,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 270 transitions, 2399 flow [2024-11-13 13:47:08,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-13 13:47:08,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-11-13 13:47:08,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 617 transitions. [2024-11-13 13:47:08,330 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5355902777777778 [2024-11-13 13:47:08,330 INFO L175 Difference]: Start difference. First operand has 125 places, 83 transitions, 754 flow. Second operand 24 states and 617 transitions. [2024-11-13 13:47:08,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 270 transitions, 2399 flow [2024-11-13 13:47:08,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 270 transitions, 2339 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-11-13 13:47:08,376 INFO L231 Difference]: Finished difference. Result has 143 places, 100 transitions, 1018 flow [2024-11-13 13:47:08,376 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=708, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1018, PETRI_PLACES=143, PETRI_TRANSITIONS=100} [2024-11-13 13:47:08,376 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 97 predicate places. [2024-11-13 13:47:08,377 INFO L471 AbstractCegarLoop]: Abstraction has has 143 places, 100 transitions, 1018 flow [2024-11-13 13:47:08,377 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 20.38095238095238) internal successors, (428), 21 states have internal predecessors, (428), 0 states have call successors, (0), 0 states 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 13:47:08,377 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:47:08,377 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:47:08,399 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-13 13:47:08,578 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-11-13 13:47:08,578 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-13 13:47:08,578 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:47:08,578 INFO L85 PathProgramCache]: Analyzing trace with hash -514552235, now seen corresponding path program 3 times [2024-11-13 13:47:08,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:47:08,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284352937] [2024-11-13 13:47:08,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:47:08,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:47:08,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:47:08,768 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 13:47:08,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:47:08,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284352937] [2024-11-13 13:47:08,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284352937] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:47:08,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768245869] [2024-11-13 13:47:08,769 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 13:47:08,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:47:08,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:47:08,771 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:47:08,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-13 13:47:08,883 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-13 13:47:08,883 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 13:47:08,885 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-13 13:47:08,887 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:47:08,897 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 13:47:09,016 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 13:47:09,016 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:47:09,287 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 13:47:09,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768245869] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:47:09,287 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 13:47:09,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 21 [2024-11-13 13:47:09,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398202266] [2024-11-13 13:47:09,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 13:47:09,288 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-13 13:47:09,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:47:09,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-13 13:47:09,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2024-11-13 13:47:10,041 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2024-11-13 13:47:10,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 100 transitions, 1018 flow. Second operand has 21 states, 21 states have (on average 22.523809523809526) internal successors, (473), 21 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:47:10,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:47:10,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2024-11-13 13:47:10,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:47:11,696 INFO L124 PetriNetUnfolderBase]: 5543/10969 cut-off events. [2024-11-13 13:47:11,696 INFO L125 PetriNetUnfolderBase]: For 38004/38004 co-relation queries the response was YES. [2024-11-13 13:47:11,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34117 conditions, 10969 events. 5543/10969 cut-off events. For 38004/38004 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 90499 event pairs, 1362 based on Foata normal form. 154/11081 useless extension candidates. Maximal degree in co-relation 21313. Up to 1704 conditions per place. [2024-11-13 13:47:11,763 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 219 selfloop transitions, 49 changer transitions 0/285 dead transitions. [2024-11-13 13:47:11,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 285 transitions, 3001 flow [2024-11-13 13:47:11,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-13 13:47:11,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-11-13 13:47:11,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 542 transitions. [2024-11-13 13:47:11,766 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5942982456140351 [2024-11-13 13:47:11,766 INFO L175 Difference]: Start difference. First operand has 143 places, 100 transitions, 1018 flow. Second operand 19 states and 542 transitions. [2024-11-13 13:47:11,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 285 transitions, 3001 flow [2024-11-13 13:47:11,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 285 transitions, 2751 flow, removed 9 selfloop flow, removed 13 redundant places. [2024-11-13 13:47:11,844 INFO L231 Difference]: Finished difference. Result has 151 places, 113 transitions, 1164 flow [2024-11-13 13:47:11,845 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=870, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1164, PETRI_PLACES=151, PETRI_TRANSITIONS=113} [2024-11-13 13:47:11,845 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 105 predicate places. [2024-11-13 13:47:11,846 INFO L471 AbstractCegarLoop]: Abstraction has has 151 places, 113 transitions, 1164 flow [2024-11-13 13:47:11,846 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 22.523809523809526) internal successors, (473), 21 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:47:11,846 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:47:11,846 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 13:47:11,865 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-13 13:47:12,050 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-11-13 13:47:12,051 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-13 13:47:12,051 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:47:12,051 INFO L85 PathProgramCache]: Analyzing trace with hash 574497061, now seen corresponding path program 1 times [2024-11-13 13:47:12,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:47:12,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484837359] [2024-11-13 13:47:12,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:47:12,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:47:12,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:47:12,256 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:47:12,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:47:12,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484837359] [2024-11-13 13:47:12,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484837359] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:47:12,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354899101] [2024-11-13 13:47:12,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:47:12,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:47:12,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:47:12,260 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:47:12,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-13 13:47:12,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:47:12,368 INFO L255 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-13 13:47:12,370 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:47:12,517 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:47:12,517 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:47:12,668 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:47:12,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354899101] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-13 13:47:12,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-13 13:47:12,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 5] total 15 [2024-11-13 13:47:12,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303959964] [2024-11-13 13:47:12,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 13:47:12,671 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-13 13:47:12,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:47:12,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-13 13:47:12,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2024-11-13 13:47:12,715 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 48 [2024-11-13 13:47:12,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 113 transitions, 1164 flow. Second operand has 6 states, 6 states have (on average 26.166666666666668) internal successors, (157), 6 states have internal predecessors, (157), 0 states have call successors, (0), 0 states 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 13:47:12,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:47:12,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 48 [2024-11-13 13:47:12,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:47:13,643 INFO L124 PetriNetUnfolderBase]: 3601/7540 cut-off events. [2024-11-13 13:47:13,643 INFO L125 PetriNetUnfolderBase]: For 34420/35173 co-relation queries the response was YES. [2024-11-13 13:47:13,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24402 conditions, 7540 events. 3601/7540 cut-off events. For 34420/35173 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 64765 event pairs, 1206 based on Foata normal form. 170/7267 useless extension candidates. Maximal degree in co-relation 14425. Up to 2766 conditions per place. [2024-11-13 13:47:13,686 INFO L140 encePairwiseOnDemand]: 41/48 looper letters, 87 selfloop transitions, 25 changer transitions 0/138 dead transitions. [2024-11-13 13:47:13,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 138 transitions, 1556 flow [2024-11-13 13:47:13,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-13 13:47:13,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-13 13:47:13,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 208 transitions. [2024-11-13 13:47:13,688 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-11-13 13:47:13,688 INFO L175 Difference]: Start difference. First operand has 151 places, 113 transitions, 1164 flow. Second operand 7 states and 208 transitions. [2024-11-13 13:47:13,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 138 transitions, 1556 flow [2024-11-13 13:47:13,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 138 transitions, 1453 flow, removed 10 selfloop flow, removed 12 redundant places. [2024-11-13 13:47:13,724 INFO L231 Difference]: Finished difference. Result has 146 places, 113 transitions, 1128 flow [2024-11-13 13:47:13,725 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1061, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1128, PETRI_PLACES=146, PETRI_TRANSITIONS=113} [2024-11-13 13:47:13,725 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 100 predicate places. [2024-11-13 13:47:13,725 INFO L471 AbstractCegarLoop]: Abstraction has has 146 places, 113 transitions, 1128 flow [2024-11-13 13:47:13,726 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 26.166666666666668) internal successors, (157), 6 states have internal predecessors, (157), 0 states have call successors, (0), 0 states 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 13:47:13,726 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:47:13,726 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 13:47:13,745 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-13 13:47:13,926 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:47:13,927 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-13 13:47:13,927 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:47:13,927 INFO L85 PathProgramCache]: Analyzing trace with hash 1500563337, now seen corresponding path program 1 times [2024-11-13 13:47:13,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:47:13,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328681203] [2024-11-13 13:47:13,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:47:13,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:47:13,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:47:14,097 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 13:47:14,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:47:14,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328681203] [2024-11-13 13:47:14,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328681203] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:47:14,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284219542] [2024-11-13 13:47:14,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:47:14,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:47:14,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:47:14,099 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:47:14,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-13 13:47:14,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:47:14,202 INFO L255 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-13 13:47:14,203 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:47:14,313 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 13:47:14,314 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:47:14,397 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 13:47:14,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284219542] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-13 13:47:14,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-13 13:47:14,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 5] total 13 [2024-11-13 13:47:14,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953982925] [2024-11-13 13:47:14,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 13:47:14,398 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-13 13:47:14,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:47:14,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-13 13:47:14,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2024-11-13 13:47:14,434 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 48 [2024-11-13 13:47:14,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 113 transitions, 1128 flow. Second operand has 6 states, 6 states have (on average 26.166666666666668) internal successors, (157), 6 states have internal predecessors, (157), 0 states have call successors, (0), 0 states 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 13:47:14,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:47:14,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 48 [2024-11-13 13:47:14,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:47:15,164 INFO L124 PetriNetUnfolderBase]: 2924/6123 cut-off events. [2024-11-13 13:47:15,164 INFO L125 PetriNetUnfolderBase]: For 28909/29604 co-relation queries the response was YES. [2024-11-13 13:47:15,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20417 conditions, 6123 events. 2924/6123 cut-off events. For 28909/29604 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 51500 event pairs, 1001 based on Foata normal form. 183/6003 useless extension candidates. Maximal degree in co-relation 11699. Up to 2380 conditions per place. [2024-11-13 13:47:15,196 INFO L140 encePairwiseOnDemand]: 41/48 looper letters, 91 selfloop transitions, 25 changer transitions 0/142 dead transitions. [2024-11-13 13:47:15,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 142 transitions, 1560 flow [2024-11-13 13:47:15,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-13 13:47:15,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-13 13:47:15,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 212 transitions. [2024-11-13 13:47:15,197 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6309523809523809 [2024-11-13 13:47:15,197 INFO L175 Difference]: Start difference. First operand has 146 places, 113 transitions, 1128 flow. Second operand 7 states and 212 transitions. [2024-11-13 13:47:15,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 142 transitions, 1560 flow [2024-11-13 13:47:15,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 142 transitions, 1486 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-11-13 13:47:15,213 INFO L231 Difference]: Finished difference. Result has 145 places, 113 transitions, 1137 flow [2024-11-13 13:47:15,213 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1070, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1137, PETRI_PLACES=145, PETRI_TRANSITIONS=113} [2024-11-13 13:47:15,214 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 99 predicate places. [2024-11-13 13:47:15,214 INFO L471 AbstractCegarLoop]: Abstraction has has 145 places, 113 transitions, 1137 flow [2024-11-13 13:47:15,214 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 26.166666666666668) internal successors, (157), 6 states have internal predecessors, (157), 0 states have call successors, (0), 0 states 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 13:47:15,214 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:47:15,214 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-13 13:47:15,231 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-13 13:47:15,414 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-13 13:47:15,415 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-13 13:47:15,415 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:47:15,415 INFO L85 PathProgramCache]: Analyzing trace with hash 9586620, now seen corresponding path program 2 times [2024-11-13 13:47:15,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:47:15,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547067499] [2024-11-13 13:47:15,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:47:15,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:47:15,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:47:15,546 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-13 13:47:15,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:47:15,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547067499] [2024-11-13 13:47:15,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547067499] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:47:15,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25904089] [2024-11-13 13:47:15,546 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 13:47:15,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:47:15,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:47:15,548 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:47:15,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-13 13:47:15,659 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-13 13:47:15,660 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 13:47:15,661 INFO L255 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-13 13:47:15,662 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:47:15,711 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-13 13:47:16,024 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 13:47:16,025 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:47:16,594 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 13:47:16,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25904089] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:47:16,595 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 13:47:16,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 18 [2024-11-13 13:47:16,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120394096] [2024-11-13 13:47:16,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 13:47:16,595 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-13 13:47:16,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:47:16,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-13 13:47:16,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2024-11-13 13:47:17,258 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2024-11-13 13:47:17,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 113 transitions, 1137 flow. Second operand has 19 states, 19 states have (on average 22.68421052631579) internal successors, (431), 19 states have internal predecessors, (431), 0 states have call successors, (0), 0 states 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 13:47:17,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:47:17,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2024-11-13 13:47:17,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:47:18,543 INFO L124 PetriNetUnfolderBase]: 3645/6883 cut-off events. [2024-11-13 13:47:18,543 INFO L125 PetriNetUnfolderBase]: For 26729/27337 co-relation queries the response was YES. [2024-11-13 13:47:18,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23502 conditions, 6883 events. 3645/6883 cut-off events. For 26729/27337 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 53981 event pairs, 1004 based on Foata normal form. 52/6580 useless extension candidates. Maximal degree in co-relation 14800. Up to 2077 conditions per place. [2024-11-13 13:47:18,595 INFO L140 encePairwiseOnDemand]: 41/48 looper letters, 145 selfloop transitions, 52 changer transitions 0/213 dead transitions. [2024-11-13 13:47:18,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 213 transitions, 2207 flow [2024-11-13 13:47:18,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-13 13:47:18,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-13 13:47:18,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 391 transitions. [2024-11-13 13:47:18,597 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5818452380952381 [2024-11-13 13:47:18,597 INFO L175 Difference]: Start difference. First operand has 145 places, 113 transitions, 1137 flow. Second operand 14 states and 391 transitions. [2024-11-13 13:47:18,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 213 transitions, 2207 flow [2024-11-13 13:47:18,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 213 transitions, 2094 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-11-13 13:47:18,633 INFO L231 Difference]: Finished difference. Result has 149 places, 124 transitions, 1318 flow [2024-11-13 13:47:18,633 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1052, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1318, PETRI_PLACES=149, PETRI_TRANSITIONS=124} [2024-11-13 13:47:18,633 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 103 predicate places. [2024-11-13 13:47:18,633 INFO L471 AbstractCegarLoop]: Abstraction has has 149 places, 124 transitions, 1318 flow [2024-11-13 13:47:18,634 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 22.68421052631579) internal successors, (431), 19 states have internal predecessors, (431), 0 states have call successors, (0), 0 states 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 13:47:18,634 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:47:18,634 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:47:18,655 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-13 13:47:18,834 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-13 13:47:18,835 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-13 13:47:18,835 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:47:18,835 INFO L85 PathProgramCache]: Analyzing trace with hash -1377883624, now seen corresponding path program 2 times [2024-11-13 13:47:18,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:47:18,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419949709] [2024-11-13 13:47:18,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:47:18,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:47:18,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:47:19,015 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 13:47:19,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:47:19,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419949709] [2024-11-13 13:47:19,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419949709] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:47:19,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262495872] [2024-11-13 13:47:19,016 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 13:47:19,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:47:19,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:47:19,018 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:47:19,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-13 13:47:19,132 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-13 13:47:19,133 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 13:47:19,134 INFO L255 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-13 13:47:19,136 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:47:19,150 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 13:47:19,160 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 13:47:19,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 13:47:19,271 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 13:47:19,280 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-13 13:47:19,281 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 13:47:19,766 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 13:47:19,766 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:47:20,500 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 13:47:20,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262495872] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:47:20,501 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 13:47:20,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 17 [2024-11-13 13:47:20,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75967021] [2024-11-13 13:47:20,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 13:47:20,502 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-13 13:47:20,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:47:20,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-13 13:47:20,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2024-11-13 13:47:21,453 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 48 [2024-11-13 13:47:21,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 124 transitions, 1318 flow. Second operand has 18 states, 18 states have (on average 21.166666666666668) internal successors, (381), 18 states have internal predecessors, (381), 0 states have call successors, (0), 0 states 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 13:47:21,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:47:21,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 48 [2024-11-13 13:47:21,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:47:23,009 INFO L124 PetriNetUnfolderBase]: 3564/6743 cut-off events. [2024-11-13 13:47:23,009 INFO L125 PetriNetUnfolderBase]: For 25320/26115 co-relation queries the response was YES. [2024-11-13 13:47:23,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22633 conditions, 6743 events. 3564/6743 cut-off events. For 25320/26115 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 52590 event pairs, 687 based on Foata normal form. 57/6707 useless extension candidates. Maximal degree in co-relation 13827. Up to 1563 conditions per place. [2024-11-13 13:47:23,039 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 178 selfloop transitions, 65 changer transitions 0/262 dead transitions. [2024-11-13 13:47:23,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 262 transitions, 2908 flow [2024-11-13 13:47:23,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-13 13:47:23,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-11-13 13:47:23,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 539 transitions. [2024-11-13 13:47:23,042 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5104166666666666 [2024-11-13 13:47:23,042 INFO L175 Difference]: Start difference. First operand has 149 places, 124 transitions, 1318 flow. Second operand 22 states and 539 transitions. [2024-11-13 13:47:23,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 262 transitions, 2908 flow [2024-11-13 13:47:23,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 262 transitions, 2803 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-11-13 13:47:23,071 INFO L231 Difference]: Finished difference. Result has 161 places, 139 transitions, 1543 flow [2024-11-13 13:47:23,071 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1224, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1543, PETRI_PLACES=161, PETRI_TRANSITIONS=139} [2024-11-13 13:47:23,072 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 115 predicate places. [2024-11-13 13:47:23,072 INFO L471 AbstractCegarLoop]: Abstraction has has 161 places, 139 transitions, 1543 flow [2024-11-13 13:47:23,072 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 21.166666666666668) internal successors, (381), 18 states have internal predecessors, (381), 0 states have call successors, (0), 0 states 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 13:47:23,072 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:47:23,072 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:47:23,085 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-13 13:47:23,273 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-13 13:47:23,273 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-13 13:47:23,274 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:47:23,274 INFO L85 PathProgramCache]: Analyzing trace with hash -701896236, now seen corresponding path program 1 times [2024-11-13 13:47:23,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:47:23,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80064606] [2024-11-13 13:47:23,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:47:23,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:47:23,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:47:23,654 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 13:47:23,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:47:23,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80064606] [2024-11-13 13:47:23,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80064606] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:47:23,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595813317] [2024-11-13 13:47:23,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:47:23,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:47:23,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:47:23,658 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:47:23,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-13 13:47:23,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:47:23,767 INFO L255 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-13 13:47:23,768 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:47:23,952 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-11-13 13:47:23,953 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 13:47:23,969 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 13:47:23,969 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:47:24,161 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-11-13 13:47:24,161 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 13:47:24,209 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 13:47:24,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595813317] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:47:24,210 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 13:47:24,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 20 [2024-11-13 13:47:24,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687516901] [2024-11-13 13:47:24,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 13:47:24,210 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-13 13:47:24,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:47:24,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-13 13:47:24,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2024-11-13 13:47:24,898 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2024-11-13 13:47:24,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 139 transitions, 1543 flow. Second operand has 21 states, 21 states have (on average 22.952380952380953) internal successors, (482), 21 states have internal predecessors, (482), 0 states have call successors, (0), 0 states 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 13:47:24,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:47:24,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2024-11-13 13:47:24,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:47:26,263 INFO L124 PetriNetUnfolderBase]: 4624/8765 cut-off events. [2024-11-13 13:47:26,263 INFO L125 PetriNetUnfolderBase]: For 28700/28777 co-relation queries the response was YES. [2024-11-13 13:47:26,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30892 conditions, 8765 events. 4624/8765 cut-off events. For 28700/28777 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 64654 event pairs, 448 based on Foata normal form. 213/8916 useless extension candidates. Maximal degree in co-relation 18610. Up to 4842 conditions per place. [2024-11-13 13:47:26,312 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 165 selfloop transitions, 79 changer transitions 1/262 dead transitions. [2024-11-13 13:47:26,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 262 transitions, 3145 flow [2024-11-13 13:47:26,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-13 13:47:26,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-13 13:47:26,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 293 transitions. [2024-11-13 13:47:26,314 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6104166666666667 [2024-11-13 13:47:26,314 INFO L175 Difference]: Start difference. First operand has 161 places, 139 transitions, 1543 flow. Second operand 10 states and 293 transitions. [2024-11-13 13:47:26,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 262 transitions, 3145 flow [2024-11-13 13:47:26,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 262 transitions, 3058 flow, removed 14 selfloop flow, removed 11 redundant places. [2024-11-13 13:47:26,463 INFO L231 Difference]: Finished difference. Result has 165 places, 180 transitions, 2321 flow [2024-11-13 13:47:26,463 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1462, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2321, PETRI_PLACES=165, PETRI_TRANSITIONS=180} [2024-11-13 13:47:26,463 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 119 predicate places. [2024-11-13 13:47:26,463 INFO L471 AbstractCegarLoop]: Abstraction has has 165 places, 180 transitions, 2321 flow [2024-11-13 13:47:26,464 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 22.952380952380953) internal successors, (482), 21 states have internal predecessors, (482), 0 states have call successors, (0), 0 states 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 13:47:26,464 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:47:26,464 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:47:26,478 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-13 13:47:26,664 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-13 13:47:26,664 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-13 13:47:26,665 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:47:26,665 INFO L85 PathProgramCache]: Analyzing trace with hash 799254, now seen corresponding path program 2 times [2024-11-13 13:47:26,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:47:26,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175264957] [2024-11-13 13:47:26,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:47:26,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:47:26,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:47:27,045 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 13:47:27,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:47:27,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175264957] [2024-11-13 13:47:27,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175264957] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 13:47:27,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 13:47:27,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-13 13:47:27,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387087192] [2024-11-13 13:47:27,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 13:47:27,046 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-13 13:47:27,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:47:27,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-13 13:47:27,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-11-13 13:47:27,260 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2024-11-13 13:47:27,261 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 180 transitions, 2321 flow. Second operand has 10 states, 10 states have (on average 22.3) internal successors, (223), 10 states have internal predecessors, (223), 0 states have call successors, (0), 0 states 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 13:47:27,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:47:27,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2024-11-13 13:47:27,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:47:28,457 INFO L124 PetriNetUnfolderBase]: 4696/8900 cut-off events. [2024-11-13 13:47:28,457 INFO L125 PetriNetUnfolderBase]: For 37533/37610 co-relation queries the response was YES. [2024-11-13 13:47:28,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34511 conditions, 8900 events. 4696/8900 cut-off events. For 37533/37610 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 66282 event pairs, 1460 based on Foata normal form. 113/8958 useless extension candidates. Maximal degree in co-relation 24452. Up to 7139 conditions per place. [2024-11-13 13:47:28,511 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 138 selfloop transitions, 82 changer transitions 14/251 dead transitions. [2024-11-13 13:47:28,511 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 251 transitions, 3646 flow [2024-11-13 13:47:28,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-13 13:47:28,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-13 13:47:28,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 249 transitions. [2024-11-13 13:47:28,512 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5763888888888888 [2024-11-13 13:47:28,512 INFO L175 Difference]: Start difference. First operand has 165 places, 180 transitions, 2321 flow. Second operand 9 states and 249 transitions. [2024-11-13 13:47:28,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 251 transitions, 3646 flow [2024-11-13 13:47:28,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 251 transitions, 3492 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-11-13 13:47:28,642 INFO L231 Difference]: Finished difference. Result has 174 places, 210 transitions, 3056 flow [2024-11-13 13:47:28,642 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2202, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3056, PETRI_PLACES=174, PETRI_TRANSITIONS=210} [2024-11-13 13:47:28,643 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 128 predicate places. [2024-11-13 13:47:28,643 INFO L471 AbstractCegarLoop]: Abstraction has has 174 places, 210 transitions, 3056 flow [2024-11-13 13:47:28,643 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 22.3) internal successors, (223), 10 states have internal predecessors, (223), 0 states have call successors, (0), 0 states 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 13:47:28,643 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:47:28,643 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:47:28,643 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-11-13 13:47:28,643 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-13 13:47:28,644 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:47:28,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1928106750, now seen corresponding path program 1 times [2024-11-13 13:47:28,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:47:28,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090766500] [2024-11-13 13:47:28,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:47:28,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:47:28,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:47:29,028 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 13:47:29,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:47:29,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090766500] [2024-11-13 13:47:29,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090766500] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 13:47:29,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 13:47:29,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-13 13:47:29,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628159004] [2024-11-13 13:47:29,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 13:47:29,029 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-13 13:47:29,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:47:29,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-13 13:47:29,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-11-13 13:47:29,293 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2024-11-13 13:47:29,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 210 transitions, 3056 flow. Second operand has 10 states, 10 states have (on average 22.3) internal successors, (223), 10 states have internal predecessors, (223), 0 states have call successors, (0), 0 states 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 13:47:29,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:47:29,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2024-11-13 13:47:29,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:47:30,491 INFO L124 PetriNetUnfolderBase]: 4678/8880 cut-off events. [2024-11-13 13:47:30,491 INFO L125 PetriNetUnfolderBase]: For 39807/39896 co-relation queries the response was YES. [2024-11-13 13:47:30,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35424 conditions, 8880 events. 4678/8880 cut-off events. For 39807/39896 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 66329 event pairs, 1510 based on Foata normal form. 134/8978 useless extension candidates. Maximal degree in co-relation 30267. Up to 7139 conditions per place. [2024-11-13 13:47:30,552 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 147 selfloop transitions, 88 changer transitions 22/274 dead transitions. [2024-11-13 13:47:30,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 274 transitions, 4167 flow [2024-11-13 13:47:30,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-13 13:47:30,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-13 13:47:30,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 254 transitions. [2024-11-13 13:47:30,553 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5879629629629629 [2024-11-13 13:47:30,553 INFO L175 Difference]: Start difference. First operand has 174 places, 210 transitions, 3056 flow. Second operand 9 states and 254 transitions. [2024-11-13 13:47:30,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 274 transitions, 4167 flow [2024-11-13 13:47:30,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 274 transitions, 3929 flow, removed 52 selfloop flow, removed 5 redundant places. [2024-11-13 13:47:30,726 INFO L231 Difference]: Finished difference. Result has 178 places, 219 transitions, 3298 flow [2024-11-13 13:47:30,726 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2903, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3298, PETRI_PLACES=178, PETRI_TRANSITIONS=219} [2024-11-13 13:47:30,726 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 132 predicate places. [2024-11-13 13:47:30,726 INFO L471 AbstractCegarLoop]: Abstraction has has 178 places, 219 transitions, 3298 flow [2024-11-13 13:47:30,727 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 22.3) internal successors, (223), 10 states have internal predecessors, (223), 0 states have call successors, (0), 0 states 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 13:47:30,727 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:47:30,727 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:47:30,727 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-11-13 13:47:30,727 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-13 13:47:30,727 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:47:30,727 INFO L85 PathProgramCache]: Analyzing trace with hash 297035972, now seen corresponding path program 2 times [2024-11-13 13:47:30,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:47:30,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887093177] [2024-11-13 13:47:30,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:47:30,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:47:30,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:47:31,116 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 13:47:31,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:47:31,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887093177] [2024-11-13 13:47:31,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887093177] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 13:47:31,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 13:47:31,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-13 13:47:31,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424175555] [2024-11-13 13:47:31,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 13:47:31,117 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-13 13:47:31,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:47:31,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-13 13:47:31,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-11-13 13:47:31,338 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2024-11-13 13:47:31,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 219 transitions, 3298 flow. Second operand has 10 states, 10 states have (on average 22.3) internal successors, (223), 10 states have internal predecessors, (223), 0 states have call successors, (0), 0 states 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 13:47:31,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:47:31,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2024-11-13 13:47:31,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:47:32,435 INFO L124 PetriNetUnfolderBase]: 4696/8900 cut-off events. [2024-11-13 13:47:32,436 INFO L125 PetriNetUnfolderBase]: For 42148/42210 co-relation queries the response was YES. [2024-11-13 13:47:32,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35660 conditions, 8900 events. 4696/8900 cut-off events. For 42148/42210 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 66120 event pairs, 1782 based on Foata normal form. 107/8944 useless extension candidates. Maximal degree in co-relation 31821. Up to 7193 conditions per place. [2024-11-13 13:47:32,493 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 131 selfloop transitions, 125 changer transitions 9/282 dead transitions. [2024-11-13 13:47:32,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 282 transitions, 4700 flow [2024-11-13 13:47:32,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-13 13:47:32,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-13 13:47:32,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 249 transitions. [2024-11-13 13:47:32,495 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5763888888888888 [2024-11-13 13:47:32,495 INFO L175 Difference]: Start difference. First operand has 178 places, 219 transitions, 3298 flow. Second operand 9 states and 249 transitions. [2024-11-13 13:47:32,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 282 transitions, 4700 flow [2024-11-13 13:47:32,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 282 transitions, 4428 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-11-13 13:47:32,675 INFO L231 Difference]: Finished difference. Result has 180 places, 253 transitions, 4112 flow [2024-11-13 13:47:32,675 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=3116, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4112, PETRI_PLACES=180, PETRI_TRANSITIONS=253} [2024-11-13 13:47:32,675 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 134 predicate places. [2024-11-13 13:47:32,675 INFO L471 AbstractCegarLoop]: Abstraction has has 180 places, 253 transitions, 4112 flow [2024-11-13 13:47:32,675 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 22.3) internal successors, (223), 10 states have internal predecessors, (223), 0 states have call successors, (0), 0 states 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 13:47:32,675 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:47:32,676 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:47:32,676 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-11-13 13:47:32,676 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-13 13:47:32,676 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:47:32,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1319425608, now seen corresponding path program 3 times [2024-11-13 13:47:32,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:47:32,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907450548] [2024-11-13 13:47:32,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:47:32,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:47:32,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:47:33,014 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 13:47:33,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:47:33,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907450548] [2024-11-13 13:47:33,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907450548] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 13:47:33,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 13:47:33,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-13 13:47:33,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189997992] [2024-11-13 13:47:33,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 13:47:33,016 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-13 13:47:33,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:47:33,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-13 13:47:33,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-11-13 13:47:33,242 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2024-11-13 13:47:33,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 253 transitions, 4112 flow. Second operand has 10 states, 10 states have (on average 22.3) internal successors, (223), 10 states have internal predecessors, (223), 0 states have call successors, (0), 0 states 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 13:47:33,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:47:33,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2024-11-13 13:47:33,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:47:34,712 INFO L124 PetriNetUnfolderBase]: 4957/9300 cut-off events. [2024-11-13 13:47:34,712 INFO L125 PetriNetUnfolderBase]: For 46956/47030 co-relation queries the response was YES. [2024-11-13 13:47:34,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39018 conditions, 9300 events. 4957/9300 cut-off events. For 46956/47030 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 68711 event pairs, 1768 based on Foata normal form. 110/9374 useless extension candidates. Maximal degree in co-relation 34299. Up to 7301 conditions per place. [2024-11-13 13:47:34,799 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 139 selfloop transitions, 172 changer transitions 9/337 dead transitions. [2024-11-13 13:47:34,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 337 transitions, 6145 flow [2024-11-13 13:47:34,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-13 13:47:34,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-13 13:47:34,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 249 transitions. [2024-11-13 13:47:34,800 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5763888888888888 [2024-11-13 13:47:34,800 INFO L175 Difference]: Start difference. First operand has 180 places, 253 transitions, 4112 flow. Second operand 9 states and 249 transitions. [2024-11-13 13:47:34,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 337 transitions, 6145 flow [2024-11-13 13:47:35,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 337 transitions, 5785 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-11-13 13:47:35,046 INFO L231 Difference]: Finished difference. Result has 186 places, 309 transitions, 5519 flow [2024-11-13 13:47:35,047 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=3866, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5519, PETRI_PLACES=186, PETRI_TRANSITIONS=309} [2024-11-13 13:47:35,047 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 140 predicate places. [2024-11-13 13:47:35,047 INFO L471 AbstractCegarLoop]: Abstraction has has 186 places, 309 transitions, 5519 flow [2024-11-13 13:47:35,047 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 22.3) internal successors, (223), 10 states have internal predecessors, (223), 0 states have call successors, (0), 0 states 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 13:47:35,047 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:47:35,047 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:47:35,047 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-11-13 13:47:35,048 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-13 13:47:35,048 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:47:35,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1835888292, now seen corresponding path program 3 times [2024-11-13 13:47:35,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:47:35,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38052731] [2024-11-13 13:47:35,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:47:35,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:47:35,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:47:35,397 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 13:47:35,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:47:35,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38052731] [2024-11-13 13:47:35,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38052731] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 13:47:35,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 13:47:35,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-13 13:47:35,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912730521] [2024-11-13 13:47:35,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 13:47:35,398 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-13 13:47:35,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:47:35,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-13 13:47:35,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-11-13 13:47:35,617 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2024-11-13 13:47:35,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 309 transitions, 5519 flow. Second operand has 10 states, 10 states have (on average 22.3) internal successors, (223), 10 states have internal predecessors, (223), 0 states have call successors, (0), 0 states 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 13:47:35,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:47:35,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2024-11-13 13:47:35,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:47:36,977 INFO L124 PetriNetUnfolderBase]: 5029/9467 cut-off events. [2024-11-13 13:47:36,977 INFO L125 PetriNetUnfolderBase]: For 51898/51960 co-relation queries the response was YES. [2024-11-13 13:47:37,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41005 conditions, 9467 events. 5029/9467 cut-off events. For 51898/51960 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 70222 event pairs, 1819 based on Foata normal form. 107/9511 useless extension candidates. Maximal degree in co-relation 33732. Up to 7346 conditions per place. [2024-11-13 13:47:37,041 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 134 selfloop transitions, 191 changer transitions 12/354 dead transitions. [2024-11-13 13:47:37,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 354 transitions, 6676 flow [2024-11-13 13:47:37,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-13 13:47:37,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-13 13:47:37,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 250 transitions. [2024-11-13 13:47:37,043 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5787037037037037 [2024-11-13 13:47:37,043 INFO L175 Difference]: Start difference. First operand has 186 places, 309 transitions, 5519 flow. Second operand 9 states and 250 transitions. [2024-11-13 13:47:37,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 354 transitions, 6676 flow [2024-11-13 13:47:37,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 354 transitions, 6447 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-11-13 13:47:37,319 INFO L231 Difference]: Finished difference. Result has 193 places, 324 transitions, 6108 flow [2024-11-13 13:47:37,320 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=5312, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6108, PETRI_PLACES=193, PETRI_TRANSITIONS=324} [2024-11-13 13:47:37,320 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 147 predicate places. [2024-11-13 13:47:37,320 INFO L471 AbstractCegarLoop]: Abstraction has has 193 places, 324 transitions, 6108 flow [2024-11-13 13:47:37,320 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 22.3) internal successors, (223), 10 states have internal predecessors, (223), 0 states have call successors, (0), 0 states 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 13:47:37,320 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:47:37,320 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:47:37,321 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-11-13 13:47:37,321 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-13 13:47:37,321 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:47:37,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1104183518, now seen corresponding path program 4 times [2024-11-13 13:47:37,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:47:37,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151934127] [2024-11-13 13:47:37,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:47:37,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:47:37,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:47:37,660 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 13:47:37,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:47:37,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151934127] [2024-11-13 13:47:37,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151934127] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 13:47:37,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 13:47:37,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-13 13:47:37,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543004838] [2024-11-13 13:47:37,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 13:47:37,660 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-13 13:47:37,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:47:37,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-13 13:47:37,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-11-13 13:47:37,866 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2024-11-13 13:47:37,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 324 transitions, 6108 flow. Second operand has 10 states, 10 states have (on average 22.3) internal successors, (223), 10 states have internal predecessors, (223), 0 states have call successors, (0), 0 states 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 13:47:37,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:47:37,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2024-11-13 13:47:37,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:47:39,472 INFO L124 PetriNetUnfolderBase]: 4894/9219 cut-off events. [2024-11-13 13:47:39,472 INFO L125 PetriNetUnfolderBase]: For 59021/59095 co-relation queries the response was YES. [2024-11-13 13:47:39,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42127 conditions, 9219 events. 4894/9219 cut-off events. For 59021/59095 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 68378 event pairs, 1747 based on Foata normal form. 119/9294 useless extension candidates. Maximal degree in co-relation 40027. Up to 7445 conditions per place. [2024-11-13 13:47:39,582 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 151 selfloop transitions, 225 changer transitions 7/400 dead transitions. [2024-11-13 13:47:39,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 400 transitions, 8188 flow [2024-11-13 13:47:39,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-13 13:47:39,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-13 13:47:39,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 249 transitions. [2024-11-13 13:47:39,583 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5763888888888888 [2024-11-13 13:47:39,583 INFO L175 Difference]: Start difference. First operand has 193 places, 324 transitions, 6108 flow. Second operand 9 states and 249 transitions. [2024-11-13 13:47:39,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 400 transitions, 8188 flow [2024-11-13 13:47:39,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 400 transitions, 7776 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-11-13 13:47:39,959 INFO L231 Difference]: Finished difference. Result has 197 places, 368 transitions, 7442 flow [2024-11-13 13:47:39,959 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=5778, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7442, PETRI_PLACES=197, PETRI_TRANSITIONS=368} [2024-11-13 13:47:39,959 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 151 predicate places. [2024-11-13 13:47:39,959 INFO L471 AbstractCegarLoop]: Abstraction has has 197 places, 368 transitions, 7442 flow [2024-11-13 13:47:39,960 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 22.3) internal successors, (223), 10 states have internal predecessors, (223), 0 states have call successors, (0), 0 states 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 13:47:39,960 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:47:39,960 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:47:39,960 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-11-13 13:47:39,960 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-13 13:47:39,960 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:47:39,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1017173788, now seen corresponding path program 5 times [2024-11-13 13:47:39,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:47:39,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645553146] [2024-11-13 13:47:39,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:47:39,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:47:39,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:47:40,311 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 13:47:40,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:47:40,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645553146] [2024-11-13 13:47:40,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645553146] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 13:47:40,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 13:47:40,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-13 13:47:40,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206479275] [2024-11-13 13:47:40,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 13:47:40,312 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-13 13:47:40,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:47:40,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-13 13:47:40,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-11-13 13:47:40,530 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2024-11-13 13:47:40,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 368 transitions, 7442 flow. Second operand has 10 states, 10 states have (on average 22.3) internal successors, (223), 10 states have internal predecessors, (223), 0 states have call successors, (0), 0 states 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 13:47:40,531 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:47:40,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2024-11-13 13:47:40,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:47:41,943 INFO L124 PetriNetUnfolderBase]: 4831/9105 cut-off events. [2024-11-13 13:47:41,943 INFO L125 PetriNetUnfolderBase]: For 61551/61625 co-relation queries the response was YES. [2024-11-13 13:47:41,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41734 conditions, 9105 events. 4831/9105 cut-off events. For 61551/61625 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 67648 event pairs, 1730 based on Foata normal form. 119/9180 useless extension candidates. Maximal degree in co-relation 39571. Up to 7445 conditions per place. [2024-11-13 13:47:42,003 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 143 selfloop transitions, 227 changer transitions 7/394 dead transitions. [2024-11-13 13:47:42,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 394 transitions, 8366 flow [2024-11-13 13:47:42,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-13 13:47:42,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-13 13:47:42,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 248 transitions. [2024-11-13 13:47:42,004 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5740740740740741 [2024-11-13 13:47:42,004 INFO L175 Difference]: Start difference. First operand has 197 places, 368 transitions, 7442 flow. Second operand 9 states and 248 transitions. [2024-11-13 13:47:42,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 394 transitions, 8366 flow [2024-11-13 13:47:42,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 394 transitions, 7988 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-11-13 13:47:42,317 INFO L231 Difference]: Finished difference. Result has 202 places, 369 transitions, 7617 flow [2024-11-13 13:47:42,317 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=7074, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=225, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7617, PETRI_PLACES=202, PETRI_TRANSITIONS=369} [2024-11-13 13:47:42,317 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 156 predicate places. [2024-11-13 13:47:42,317 INFO L471 AbstractCegarLoop]: Abstraction has has 202 places, 369 transitions, 7617 flow [2024-11-13 13:47:42,318 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 22.3) internal successors, (223), 10 states have internal predecessors, (223), 0 states have call successors, (0), 0 states 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 13:47:42,318 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:47:42,318 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:47:42,318 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-11-13 13:47:42,318 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-13 13:47:42,318 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:47:42,318 INFO L85 PathProgramCache]: Analyzing trace with hash 1619463296, now seen corresponding path program 4 times [2024-11-13 13:47:42,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:47:42,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604233905] [2024-11-13 13:47:42,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:47:42,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:47:42,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:47:42,647 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 13:47:42,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:47:42,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604233905] [2024-11-13 13:47:42,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604233905] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 13:47:42,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 13:47:42,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-13 13:47:42,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765073226] [2024-11-13 13:47:42,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 13:47:42,648 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-13 13:47:42,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:47:42,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-13 13:47:42,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-11-13 13:47:42,839 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2024-11-13 13:47:42,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 369 transitions, 7617 flow. Second operand has 10 states, 10 states have (on average 22.3) internal successors, (223), 10 states have internal predecessors, (223), 0 states have call successors, (0), 0 states 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 13:47:42,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:47:42,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2024-11-13 13:47:42,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:47:44,352 INFO L124 PetriNetUnfolderBase]: 4750/8935 cut-off events. [2024-11-13 13:47:44,352 INFO L125 PetriNetUnfolderBase]: For 62770/62844 co-relation queries the response was YES. [2024-11-13 13:47:44,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41093 conditions, 8935 events. 4750/8935 cut-off events. For 62770/62844 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 65604 event pairs, 1842 based on Foata normal form. 110/9007 useless extension candidates. Maximal degree in co-relation 38911. Up to 7445 conditions per place. [2024-11-13 13:47:44,404 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 147 selfloop transitions, 227 changer transitions 3/394 dead transitions. [2024-11-13 13:47:44,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 394 transitions, 8521 flow [2024-11-13 13:47:44,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-13 13:47:44,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-13 13:47:44,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 245 transitions. [2024-11-13 13:47:44,406 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5671296296296297 [2024-11-13 13:47:44,406 INFO L175 Difference]: Start difference. First operand has 202 places, 369 transitions, 7617 flow. Second operand 9 states and 245 transitions. [2024-11-13 13:47:44,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 394 transitions, 8521 flow [2024-11-13 13:47:44,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 394 transitions, 8001 flow, removed 13 selfloop flow, removed 9 redundant places. [2024-11-13 13:47:44,688 INFO L231 Difference]: Finished difference. Result has 201 places, 370 transitions, 7590 flow [2024-11-13 13:47:44,689 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=7105, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=225, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7590, PETRI_PLACES=201, PETRI_TRANSITIONS=370} [2024-11-13 13:47:44,689 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 155 predicate places. [2024-11-13 13:47:44,689 INFO L471 AbstractCegarLoop]: Abstraction has has 201 places, 370 transitions, 7590 flow [2024-11-13 13:47:44,689 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 22.3) internal successors, (223), 10 states have internal predecessors, (223), 0 states have call successors, (0), 0 states 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 13:47:44,689 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:47:44,690 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:47:44,690 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-11-13 13:47:44,690 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-13 13:47:44,690 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:47:44,690 INFO L85 PathProgramCache]: Analyzing trace with hash 1428911986, now seen corresponding path program 5 times [2024-11-13 13:47:44,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:47:44,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630539541] [2024-11-13 13:47:44,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:47:44,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:47:44,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:47:44,963 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 13:47:44,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:47:44,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630539541] [2024-11-13 13:47:44,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630539541] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:47:44,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157591608] [2024-11-13 13:47:44,963 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-13 13:47:44,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:47:44,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:47:44,965 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:47:44,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-13 13:47:45,059 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 13:47:45,060 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 13:47:45,061 INFO L255 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-13 13:47:45,062 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:47:45,293 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-13 13:47:45,305 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 13:47:45,305 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:47:45,455 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-11-13 13:47:45,455 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 13:47:45,506 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 13:47:45,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157591608] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:47:45,506 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 13:47:45,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 17 [2024-11-13 13:47:45,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096694906] [2024-11-13 13:47:45,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 13:47:45,507 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-13 13:47:45,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:47:45,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-13 13:47:45,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2024-11-13 13:47:45,927 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2024-11-13 13:47:45,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 370 transitions, 7590 flow. Second operand has 18 states, 18 states have (on average 22.61111111111111) internal successors, (407), 18 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 13:47:45,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:47:45,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2024-11-13 13:47:45,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:47:47,866 INFO L124 PetriNetUnfolderBase]: 5405/10006 cut-off events. [2024-11-13 13:47:47,866 INFO L125 PetriNetUnfolderBase]: For 66193/66267 co-relation queries the response was YES. [2024-11-13 13:47:47,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46150 conditions, 10006 events. 5405/10006 cut-off events. For 66193/66267 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 73854 event pairs, 1054 based on Foata normal form. 210/10188 useless extension candidates. Maximal degree in co-relation 44024. Up to 6629 conditions per place. [2024-11-13 13:47:47,932 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 185 selfloop transitions, 285 changer transitions 0/487 dead transitions. [2024-11-13 13:47:47,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 487 transitions, 9634 flow [2024-11-13 13:47:47,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-13 13:47:47,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-13 13:47:47,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 398 transitions. [2024-11-13 13:47:47,933 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5922619047619048 [2024-11-13 13:47:47,934 INFO L175 Difference]: Start difference. First operand has 201 places, 370 transitions, 7590 flow. Second operand 14 states and 398 transitions. [2024-11-13 13:47:47,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 487 transitions, 9634 flow [2024-11-13 13:47:48,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 487 transitions, 9184 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-13 13:47:48,264 INFO L231 Difference]: Finished difference. Result has 213 places, 417 transitions, 8582 flow [2024-11-13 13:47:48,264 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=7140, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=243, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=8582, PETRI_PLACES=213, PETRI_TRANSITIONS=417} [2024-11-13 13:47:48,264 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 167 predicate places. [2024-11-13 13:47:48,264 INFO L471 AbstractCegarLoop]: Abstraction has has 213 places, 417 transitions, 8582 flow [2024-11-13 13:47:48,264 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 22.61111111111111) internal successors, (407), 18 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 13:47:48,264 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:47:48,265 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:47:48,278 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-13 13:47:48,465 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-11-13 13:47:48,465 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-13 13:47:48,465 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:47:48,465 INFO L85 PathProgramCache]: Analyzing trace with hash -24292040, now seen corresponding path program 6 times [2024-11-13 13:47:48,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:47:48,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842833665] [2024-11-13 13:47:48,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:47:48,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:47:48,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:47:48,796 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 13:47:48,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:47:48,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842833665] [2024-11-13 13:47:48,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842833665] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 13:47:48,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 13:47:48,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-13 13:47:48,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228699679] [2024-11-13 13:47:48,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 13:47:48,797 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-13 13:47:48,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:47:48,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-13 13:47:48,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-11-13 13:47:48,986 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2024-11-13 13:47:48,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 417 transitions, 8582 flow. Second operand has 10 states, 10 states have (on average 22.3) internal successors, (223), 10 states have internal predecessors, (223), 0 states have call successors, (0), 0 states 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 13:47:48,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:47:48,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2024-11-13 13:47:48,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:47:51,125 INFO L124 PetriNetUnfolderBase]: 5269/9874 cut-off events. [2024-11-13 13:47:51,125 INFO L125 PetriNetUnfolderBase]: For 81509/81587 co-relation queries the response was YES. [2024-11-13 13:47:51,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48853 conditions, 9874 events. 5269/9874 cut-off events. For 81509/81587 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 73644 event pairs, 1669 based on Foata normal form. 210/10040 useless extension candidates. Maximal degree in co-relation 46721. Up to 8193 conditions per place. [2024-11-13 13:47:51,226 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 193 selfloop transitions, 240 changer transitions 0/450 dead transitions. [2024-11-13 13:47:51,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 450 transitions, 9674 flow [2024-11-13 13:47:51,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-13 13:47:51,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-13 13:47:51,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 251 transitions. [2024-11-13 13:47:51,227 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5810185185185185 [2024-11-13 13:47:51,227 INFO L175 Difference]: Start difference. First operand has 213 places, 417 transitions, 8582 flow. Second operand 9 states and 251 transitions. [2024-11-13 13:47:51,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 450 transitions, 9674 flow [2024-11-13 13:47:51,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 450 transitions, 9392 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-11-13 13:47:51,741 INFO L231 Difference]: Finished difference. Result has 215 places, 415 transitions, 8761 flow [2024-11-13 13:47:51,741 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=8281, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=240, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8761, PETRI_PLACES=215, PETRI_TRANSITIONS=415} [2024-11-13 13:47:51,742 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 169 predicate places. [2024-11-13 13:47:51,742 INFO L471 AbstractCegarLoop]: Abstraction has has 215 places, 415 transitions, 8761 flow [2024-11-13 13:47:51,742 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 22.3) internal successors, (223), 10 states have internal predecessors, (223), 0 states have call successors, (0), 0 states 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 13:47:51,742 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:47:51,742 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:47:51,742 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-11-13 13:47:51,743 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-13 13:47:51,743 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:47:51,743 INFO L85 PathProgramCache]: Analyzing trace with hash 195553794, now seen corresponding path program 6 times [2024-11-13 13:47:51,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:47:51,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33298330] [2024-11-13 13:47:51,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:47:51,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:47:51,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:47:52,051 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 13:47:52,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:47:52,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33298330] [2024-11-13 13:47:52,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33298330] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 13:47:52,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 13:47:52,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-13 13:47:52,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173538032] [2024-11-13 13:47:52,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 13:47:52,051 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-13 13:47:52,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:47:52,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-13 13:47:52,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-11-13 13:47:52,227 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2024-11-13 13:47:52,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 415 transitions, 8761 flow. Second operand has 10 states, 10 states have (on average 22.3) internal successors, (223), 10 states have internal predecessors, (223), 0 states have call successors, (0), 0 states 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 13:47:52,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:47:52,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2024-11-13 13:47:52,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:47:54,019 INFO L124 PetriNetUnfolderBase]: 5224/9813 cut-off events. [2024-11-13 13:47:54,019 INFO L125 PetriNetUnfolderBase]: For 79314/79392 co-relation queries the response was YES. [2024-11-13 13:47:54,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48230 conditions, 9813 events. 5224/9813 cut-off events. For 79314/79392 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 73259 event pairs, 1735 based on Foata normal form. 119/9890 useless extension candidates. Maximal degree in co-relation 46016. Up to 8345 conditions per place. [2024-11-13 13:47:54,083 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 192 selfloop transitions, 217 changer transitions 4/430 dead transitions. [2024-11-13 13:47:54,083 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 430 transitions, 9466 flow [2024-11-13 13:47:54,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-13 13:47:54,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-13 13:47:54,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 245 transitions. [2024-11-13 13:47:54,084 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5671296296296297 [2024-11-13 13:47:54,084 INFO L175 Difference]: Start difference. First operand has 215 places, 415 transitions, 8761 flow. Second operand 9 states and 245 transitions. [2024-11-13 13:47:54,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 430 transitions, 9466 flow [2024-11-13 13:47:54,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 430 transitions, 9043 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-13 13:47:54,492 INFO L231 Difference]: Finished difference. Result has 217 places, 405 transitions, 8518 flow [2024-11-13 13:47:54,492 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=8093, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=217, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8518, PETRI_PLACES=217, PETRI_TRANSITIONS=405} [2024-11-13 13:47:54,493 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 171 predicate places. [2024-11-13 13:47:54,493 INFO L471 AbstractCegarLoop]: Abstraction has has 217 places, 405 transitions, 8518 flow [2024-11-13 13:47:54,493 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 22.3) internal successors, (223), 10 states have internal predecessors, (223), 0 states have call successors, (0), 0 states 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 13:47:54,493 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:47:54,493 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:47:54,493 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-11-13 13:47:54,493 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-13 13:47:54,494 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:47:54,494 INFO L85 PathProgramCache]: Analyzing trace with hash -1601017032, now seen corresponding path program 7 times [2024-11-13 13:47:54,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:47:54,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570331345] [2024-11-13 13:47:54,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:47:54,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:47:54,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:47:54,802 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 13:47:54,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:47:54,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570331345] [2024-11-13 13:47:54,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570331345] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:47:54,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300332915] [2024-11-13 13:47:54,803 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-13 13:47:54,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:47:54,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:47:54,805 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:47:54,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-13 13:47:54,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:47:54,913 INFO L255 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-13 13:47:54,915 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:47:55,064 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 13:47:55,065 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 29 treesize of output 25 [2024-11-13 13:47:55,089 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 13:47:55,090 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:47:55,312 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-11-13 13:47:55,313 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 13:47:55,352 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 13:47:55,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300332915] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-13 13:47:55,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-13 13:47:55,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9, 7] total 19 [2024-11-13 13:47:55,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495798168] [2024-11-13 13:47:55,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 13:47:55,352 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-13 13:47:55,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:47:55,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-13 13:47:55,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2024-11-13 13:47:55,705 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2024-11-13 13:47:55,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 405 transitions, 8518 flow. Second operand has 8 states, 8 states have (on average 22.875) internal successors, (183), 8 states have internal predecessors, (183), 0 states have call successors, (0), 0 states 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 13:47:55,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:47:55,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2024-11-13 13:47:55,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:47:58,160 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.80s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-13 13:48:00,159 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-13 13:48:05,032 INFO L124 PetriNetUnfolderBase]: 5367/10042 cut-off events. [2024-11-13 13:48:05,032 INFO L125 PetriNetUnfolderBase]: For 80686/80764 co-relation queries the response was YES. [2024-11-13 13:48:05,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49806 conditions, 10042 events. 5367/10042 cut-off events. For 80686/80764 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 75086 event pairs, 1571 based on Foata normal form. 192/10188 useless extension candidates. Maximal degree in co-relation 47592. Up to 8445 conditions per place. [2024-11-13 13:48:05,096 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 216 selfloop transitions, 217 changer transitions 0/450 dead transitions. [2024-11-13 13:48:05,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 450 transitions, 9815 flow [2024-11-13 13:48:05,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-13 13:48:05,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-13 13:48:05,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 251 transitions. [2024-11-13 13:48:05,098 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5810185185185185 [2024-11-13 13:48:05,098 INFO L175 Difference]: Start difference. First operand has 217 places, 405 transitions, 8518 flow. Second operand 9 states and 251 transitions. [2024-11-13 13:48:05,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 450 transitions, 9815 flow [2024-11-13 13:48:05,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 450 transitions, 9381 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-11-13 13:48:05,539 INFO L231 Difference]: Finished difference. Result has 217 places, 414 transitions, 8724 flow [2024-11-13 13:48:05,540 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=8084, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=208, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8724, PETRI_PLACES=217, PETRI_TRANSITIONS=414} [2024-11-13 13:48:05,540 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 171 predicate places. [2024-11-13 13:48:05,540 INFO L471 AbstractCegarLoop]: Abstraction has has 217 places, 414 transitions, 8724 flow [2024-11-13 13:48:05,540 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 22.875) internal successors, (183), 8 states have internal predecessors, (183), 0 states have call successors, (0), 0 states 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 13:48:05,540 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:48:05,540 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:48:05,574 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-13 13:48:05,741 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2024-11-13 13:48:05,741 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-13 13:48:05,741 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:48:05,741 INFO L85 PathProgramCache]: Analyzing trace with hash -2039738232, now seen corresponding path program 7 times [2024-11-13 13:48:05,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:48:05,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152318416] [2024-11-13 13:48:05,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:48:05,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:48:05,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:48:06,085 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 13:48:06,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:48:06,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152318416] [2024-11-13 13:48:06,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152318416] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 13:48:06,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 13:48:06,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-13 13:48:06,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631080471] [2024-11-13 13:48:06,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 13:48:06,086 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-13 13:48:06,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:48:06,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-13 13:48:06,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-11-13 13:48:06,317 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2024-11-13 13:48:06,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 414 transitions, 8724 flow. Second operand has 10 states, 10 states have (on average 22.3) internal successors, (223), 10 states have internal predecessors, (223), 0 states have call successors, (0), 0 states 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 13:48:06,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:48:06,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2024-11-13 13:48:06,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:48:08,184 INFO L124 PetriNetUnfolderBase]: 5430/10172 cut-off events. [2024-11-13 13:48:08,184 INFO L125 PetriNetUnfolderBase]: For 88956/89034 co-relation queries the response was YES. [2024-11-13 13:48:08,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51530 conditions, 10172 events. 5430/10172 cut-off events. For 88956/89034 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 76357 event pairs, 1692 based on Foata normal form. 110/10238 useless extension candidates. Maximal degree in co-relation 49315. Up to 8660 conditions per place. [2024-11-13 13:48:08,292 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 193 selfloop transitions, 239 changer transitions 3/452 dead transitions. [2024-11-13 13:48:08,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 452 transitions, 10271 flow [2024-11-13 13:48:08,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-13 13:48:08,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-13 13:48:08,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 244 transitions. [2024-11-13 13:48:08,293 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5648148148148148 [2024-11-13 13:48:08,293 INFO L175 Difference]: Start difference. First operand has 217 places, 414 transitions, 8724 flow. Second operand 9 states and 244 transitions. [2024-11-13 13:48:08,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 452 transitions, 10271 flow [2024-11-13 13:48:09,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 452 transitions, 9795 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-11-13 13:48:09,010 INFO L231 Difference]: Finished difference. Result has 219 places, 435 transitions, 9391 flow [2024-11-13 13:48:09,010 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=8290, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=218, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9391, PETRI_PLACES=219, PETRI_TRANSITIONS=435} [2024-11-13 13:48:09,011 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 173 predicate places. [2024-11-13 13:48:09,011 INFO L471 AbstractCegarLoop]: Abstraction has has 219 places, 435 transitions, 9391 flow [2024-11-13 13:48:09,011 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 22.3) internal successors, (223), 10 states have internal predecessors, (223), 0 states have call successors, (0), 0 states 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 13:48:09,011 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:48:09,011 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:48:09,011 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-11-13 13:48:09,011 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-13 13:48:09,012 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:48:09,012 INFO L85 PathProgramCache]: Analyzing trace with hash 839346024, now seen corresponding path program 8 times [2024-11-13 13:48:09,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:48:09,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863369325] [2024-11-13 13:48:09,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:48:09,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:48:09,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:48:09,278 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 13:48:09,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:48:09,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863369325] [2024-11-13 13:48:09,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863369325] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:48:09,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724145940] [2024-11-13 13:48:09,278 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 13:48:09,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:48:09,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:48:09,280 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:48:09,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-13 13:48:09,380 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 13:48:09,380 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 13:48:09,381 INFO L255 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-13 13:48:09,383 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:48:09,452 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 1 [2024-11-13 13:48:09,696 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 13:48:09,696 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 29 treesize of output 21 [2024-11-13 13:48:09,743 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 13:48:09,743 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:48:09,994 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 13:48:09,995 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 158 treesize of output 154 [2024-11-13 13:48:10,011 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-13 13:48:10,012 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 46 treesize of output 37 [2024-11-13 13:48:10,112 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2024-11-13 13:48:10,112 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 166 treesize of output 169 [2024-11-13 13:48:10,378 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 13:48:10,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724145940] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:48:10,378 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 13:48:10,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 20 [2024-11-13 13:48:10,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128026661] [2024-11-13 13:48:10,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 13:48:10,381 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-13 13:48:10,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:48:10,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-13 13:48:10,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2024-11-13 13:48:11,093 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2024-11-13 13:48:11,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 435 transitions, 9391 flow. Second operand has 21 states, 21 states have (on average 22.333333333333332) internal successors, (469), 21 states have internal predecessors, (469), 0 states have call successors, (0), 0 states 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 13:48:11,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:48:11,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2024-11-13 13:48:11,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:48:14,174 INFO L124 PetriNetUnfolderBase]: 6373/12074 cut-off events. [2024-11-13 13:48:14,174 INFO L125 PetriNetUnfolderBase]: For 101227/101305 co-relation queries the response was YES. [2024-11-13 13:48:14,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59476 conditions, 12074 events. 6373/12074 cut-off events. For 101227/101305 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 94889 event pairs, 1670 based on Foata normal form. 210/12240 useless extension candidates. Maximal degree in co-relation 56782. Up to 8888 conditions per place. [2024-11-13 13:48:14,264 INFO L140 encePairwiseOnDemand]: 35/48 looper letters, 239 selfloop transitions, 287 changer transitions 0/543 dead transitions. [2024-11-13 13:48:14,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 543 transitions, 11472 flow [2024-11-13 13:48:14,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-13 13:48:14,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-11-13 13:48:14,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 487 transitions. [2024-11-13 13:48:14,265 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5636574074074074 [2024-11-13 13:48:14,266 INFO L175 Difference]: Start difference. First operand has 219 places, 435 transitions, 9391 flow. Second operand 18 states and 487 transitions. [2024-11-13 13:48:14,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 543 transitions, 11472 flow [2024-11-13 13:48:14,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 543 transitions, 10994 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-13 13:48:14,858 INFO L231 Difference]: Finished difference. Result has 232 places, 478 transitions, 10352 flow [2024-11-13 13:48:14,858 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=8917, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=435, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=255, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=10352, PETRI_PLACES=232, PETRI_TRANSITIONS=478} [2024-11-13 13:48:14,859 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 186 predicate places. [2024-11-13 13:48:14,859 INFO L471 AbstractCegarLoop]: Abstraction has has 232 places, 478 transitions, 10352 flow [2024-11-13 13:48:14,859 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 22.333333333333332) internal successors, (469), 21 states have internal predecessors, (469), 0 states have call successors, (0), 0 states 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 13:48:14,859 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:48:14,859 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, 1, 1, 1, 1, 1] [2024-11-13 13:48:14,897 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-13 13:48:15,060 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2024-11-13 13:48:15,060 INFO L396 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-13 13:48:15,060 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:48:15,060 INFO L85 PathProgramCache]: Analyzing trace with hash 607055226, now seen corresponding path program 8 times [2024-11-13 13:48:15,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:48:15,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145595550] [2024-11-13 13:48:15,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:48:15,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:48:15,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:48:15,386 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 13:48:15,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:48:15,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145595550] [2024-11-13 13:48:15,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145595550] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:48:15,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522780509] [2024-11-13 13:48:15,387 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 13:48:15,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:48:15,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:48:15,389 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:48:15,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-13 13:48:15,502 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 13:48:15,503 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 13:48:15,504 INFO L255 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-13 13:48:15,506 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:48:15,840 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-13 13:48:15,842 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 13:48:15,842 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:48:15,984 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-11-13 13:48:15,984 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 13:48:16,027 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 13:48:16,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522780509] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:48:16,027 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 13:48:16,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 15 [2024-11-13 13:48:16,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414449588] [2024-11-13 13:48:16,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 13:48:16,027 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-13 13:48:16,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:48:16,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-13 13:48:16,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2024-11-13 13:48:16,447 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2024-11-13 13:48:16,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 478 transitions, 10352 flow. Second operand has 16 states, 16 states have (on average 22.6875) internal successors, (363), 16 states have internal predecessors, (363), 0 states have call successors, (0), 0 states 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 13:48:16,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:48:16,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2024-11-13 13:48:16,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:48:19,684 INFO L124 PetriNetUnfolderBase]: 6974/13041 cut-off events. [2024-11-13 13:48:19,684 INFO L125 PetriNetUnfolderBase]: For 115278/115364 co-relation queries the response was YES. [2024-11-13 13:48:19,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66601 conditions, 13041 events. 6974/13041 cut-off events. For 115278/115364 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 102208 event pairs, 2021 based on Foata normal form. 192/13182 useless extension candidates. Maximal degree in co-relation 63549. Up to 10663 conditions per place. [2024-11-13 13:48:19,830 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 254 selfloop transitions, 269 changer transitions 0/540 dead transitions. [2024-11-13 13:48:19,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 540 transitions, 12135 flow [2024-11-13 13:48:19,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-13 13:48:19,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-13 13:48:19,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 255 transitions. [2024-11-13 13:48:19,832 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5902777777777778 [2024-11-13 13:48:19,832 INFO L175 Difference]: Start difference. First operand has 232 places, 478 transitions, 10352 flow. Second operand 9 states and 255 transitions. [2024-11-13 13:48:19,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 540 transitions, 12135 flow [2024-11-13 13:48:20,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 540 transitions, 11637 flow, removed 30 selfloop flow, removed 8 redundant places. [2024-11-13 13:48:20,918 INFO L231 Difference]: Finished difference. Result has 234 places, 499 transitions, 10885 flow [2024-11-13 13:48:20,918 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=9860, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=257, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10885, PETRI_PLACES=234, PETRI_TRANSITIONS=499} [2024-11-13 13:48:20,918 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 188 predicate places. [2024-11-13 13:48:20,918 INFO L471 AbstractCegarLoop]: Abstraction has has 234 places, 499 transitions, 10885 flow [2024-11-13 13:48:20,919 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 22.6875) internal successors, (363), 16 states have internal predecessors, (363), 0 states have call successors, (0), 0 states 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 13:48:20,919 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:48:20,919 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:48:20,932 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-11-13 13:48:21,119 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:48:21,119 INFO L396 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-13 13:48:21,120 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:48:21,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1186039040, now seen corresponding path program 9 times [2024-11-13 13:48:21,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:48:21,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945526979] [2024-11-13 13:48:21,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:48:21,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:48:21,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:48:21,541 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 13:48:21,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:48:21,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945526979] [2024-11-13 13:48:21,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945526979] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:48:21,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380727359] [2024-11-13 13:48:21,542 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 13:48:21,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:48:21,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:48:21,544 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:48:21,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-13 13:48:21,643 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-13 13:48:21,643 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 13:48:21,645 INFO L255 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-13 13:48:21,646 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:48:21,833 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 13:48:21,833 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 29 treesize of output 21 [2024-11-13 13:48:21,871 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 13:48:21,871 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:48:22,038 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-11-13 13:48:22,039 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 13:48:22,076 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 13:48:22,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380727359] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:48:22,076 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 13:48:22,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 17 [2024-11-13 13:48:22,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929286663] [2024-11-13 13:48:22,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 13:48:22,076 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-13 13:48:22,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:48:22,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-13 13:48:22,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2024-11-13 13:48:22,556 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2024-11-13 13:48:22,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 499 transitions, 10885 flow. Second operand has 18 states, 18 states have (on average 22.555555555555557) internal successors, (406), 18 states have internal predecessors, (406), 0 states have call successors, (0), 0 states 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 13:48:22,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:48:22,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2024-11-13 13:48:22,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:48:25,316 INFO L124 PetriNetUnfolderBase]: 6913/12904 cut-off events. [2024-11-13 13:48:25,317 INFO L125 PetriNetUnfolderBase]: For 122022/122104 co-relation queries the response was YES. [2024-11-13 13:48:25,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67679 conditions, 12904 events. 6913/12904 cut-off events. For 122022/122104 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 101008 event pairs, 2027 based on Foata normal form. 210/13056 useless extension candidates. Maximal degree in co-relation 63835. Up to 11168 conditions per place. [2024-11-13 13:48:25,433 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 263 selfloop transitions, 255 changer transitions 0/535 dead transitions. [2024-11-13 13:48:25,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 535 transitions, 12189 flow [2024-11-13 13:48:25,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-13 13:48:25,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-13 13:48:25,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 300 transitions. [2024-11-13 13:48:25,434 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5681818181818182 [2024-11-13 13:48:25,435 INFO L175 Difference]: Start difference. First operand has 234 places, 499 transitions, 10885 flow. Second operand 11 states and 300 transitions. [2024-11-13 13:48:25,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 535 transitions, 12189 flow [2024-11-13 13:48:26,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 535 transitions, 11621 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-11-13 13:48:26,258 INFO L231 Difference]: Finished difference. Result has 238 places, 502 transitions, 10939 flow [2024-11-13 13:48:26,259 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=10302, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=497, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=250, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10939, PETRI_PLACES=238, PETRI_TRANSITIONS=502} [2024-11-13 13:48:26,259 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 192 predicate places. [2024-11-13 13:48:26,259 INFO L471 AbstractCegarLoop]: Abstraction has has 238 places, 502 transitions, 10939 flow [2024-11-13 13:48:26,260 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 22.555555555555557) internal successors, (406), 18 states have internal predecessors, (406), 0 states have call successors, (0), 0 states 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 13:48:26,260 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:48:26,260 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:48:26,281 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-11-13 13:48:26,460 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:48:26,460 INFO L396 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-13 13:48:26,461 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:48:26,461 INFO L85 PathProgramCache]: Analyzing trace with hash 356590276, now seen corresponding path program 10 times [2024-11-13 13:48:26,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:48:26,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132725377] [2024-11-13 13:48:26,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:48:26,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:48:26,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:48:26,937 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 13:48:26,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:48:26,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132725377] [2024-11-13 13:48:26,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132725377] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:48:26,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986493593] [2024-11-13 13:48:26,937 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 13:48:26,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:48:26,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:48:26,940 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:48:26,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-13 13:48:27,064 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 13:48:27,065 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 13:48:27,066 INFO L255 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-13 13:48:27,068 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:48:27,326 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-13 13:48:27,338 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 13:48:27,338 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:48:27,502 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-11-13 13:48:27,502 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 13:48:27,560 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 13:48:27,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986493593] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:48:27,560 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 13:48:27,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 16 [2024-11-13 13:48:27,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262609336] [2024-11-13 13:48:27,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 13:48:27,560 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-13 13:48:27,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:48:27,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-13 13:48:27,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2024-11-13 13:48:27,929 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2024-11-13 13:48:27,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 502 transitions, 10939 flow. Second operand has 17 states, 17 states have (on average 22.705882352941178) internal successors, (386), 17 states have internal predecessors, (386), 0 states have call successors, (0), 0 states 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 13:48:27,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:48:27,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2024-11-13 13:48:27,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:48:31,180 INFO L124 PetriNetUnfolderBase]: 6951/12939 cut-off events. [2024-11-13 13:48:31,181 INFO L125 PetriNetUnfolderBase]: For 126715/126797 co-relation queries the response was YES. [2024-11-13 13:48:31,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69055 conditions, 12939 events. 6951/12939 cut-off events. For 126715/126797 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 100839 event pairs, 1888 based on Foata normal form. 214/13095 useless extension candidates. Maximal degree in co-relation 64545. Up to 10499 conditions per place. [2024-11-13 13:48:31,346 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 248 selfloop transitions, 279 changer transitions 0/544 dead transitions. [2024-11-13 13:48:31,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 544 transitions, 12383 flow [2024-11-13 13:48:31,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-13 13:48:31,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-13 13:48:31,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 257 transitions. [2024-11-13 13:48:31,347 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5949074074074074 [2024-11-13 13:48:31,348 INFO L175 Difference]: Start difference. First operand has 238 places, 502 transitions, 10939 flow. Second operand 9 states and 257 transitions. [2024-11-13 13:48:31,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 544 transitions, 12383 flow [2024-11-13 13:48:32,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 544 transitions, 12005 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-11-13 13:48:32,518 INFO L231 Difference]: Finished difference. Result has 241 places, 505 transitions, 11293 flow [2024-11-13 13:48:32,519 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=10547, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=500, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=274, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11293, PETRI_PLACES=241, PETRI_TRANSITIONS=505} [2024-11-13 13:48:32,519 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 195 predicate places. [2024-11-13 13:48:32,519 INFO L471 AbstractCegarLoop]: Abstraction has has 241 places, 505 transitions, 11293 flow [2024-11-13 13:48:32,520 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 22.705882352941178) internal successors, (386), 17 states have internal predecessors, (386), 0 states have call successors, (0), 0 states 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 13:48:32,520 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:48:32,520 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:48:32,533 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-11-13 13:48:32,720 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:48:32,720 INFO L396 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-13 13:48:32,721 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:48:32,721 INFO L85 PathProgramCache]: Analyzing trace with hash -14353168, now seen corresponding path program 11 times [2024-11-13 13:48:32,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:48:32,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360125622] [2024-11-13 13:48:32,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:48:32,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:48:32,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:48:32,992 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 13:48:32,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:48:32,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360125622] [2024-11-13 13:48:32,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360125622] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 13:48:32,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 13:48:32,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-13 13:48:32,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106924177] [2024-11-13 13:48:32,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 13:48:32,993 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-13 13:48:32,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:48:32,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-13 13:48:32,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-11-13 13:48:33,187 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2024-11-13 13:48:33,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 505 transitions, 11293 flow. Second operand has 10 states, 10 states have (on average 22.3) internal successors, (223), 10 states have internal predecessors, (223), 0 states have call successors, (0), 0 states 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 13:48:33,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:48:33,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2024-11-13 13:48:33,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:48:36,499 INFO L124 PetriNetUnfolderBase]: 6693/12351 cut-off events. [2024-11-13 13:48:36,499 INFO L125 PetriNetUnfolderBase]: For 136963/137045 co-relation queries the response was YES. [2024-11-13 13:48:36,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68397 conditions, 12351 events. 6693/12351 cut-off events. For 136963/137045 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 94563 event pairs, 1832 based on Foata normal form. 110/12411 useless extension candidates. Maximal degree in co-relation 65021. Up to 10839 conditions per place. [2024-11-13 13:48:36,616 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 262 selfloop transitions, 229 changer transitions 3/511 dead transitions. [2024-11-13 13:48:36,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 511 transitions, 12068 flow [2024-11-13 13:48:36,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-13 13:48:36,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-13 13:48:36,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 244 transitions. [2024-11-13 13:48:36,617 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5648148148148148 [2024-11-13 13:48:36,617 INFO L175 Difference]: Start difference. First operand has 241 places, 505 transitions, 11293 flow. Second operand 9 states and 244 transitions. [2024-11-13 13:48:36,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 511 transitions, 12068 flow [2024-11-13 13:48:37,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 511 transitions, 11574 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-11-13 13:48:37,936 INFO L231 Difference]: Finished difference. Result has 242 places, 494 transitions, 10977 flow [2024-11-13 13:48:37,936 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=10530, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=495, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=229, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10977, PETRI_PLACES=242, PETRI_TRANSITIONS=494} [2024-11-13 13:48:37,937 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 196 predicate places. [2024-11-13 13:48:37,937 INFO L471 AbstractCegarLoop]: Abstraction has has 242 places, 494 transitions, 10977 flow [2024-11-13 13:48:37,937 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 22.3) internal successors, (223), 10 states have internal predecessors, (223), 0 states have call successors, (0), 0 states 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 13:48:37,937 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:48:37,937 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:48:37,937 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-11-13 13:48:37,937 INFO L396 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-13 13:48:37,937 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:48:37,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1392814316, now seen corresponding path program 9 times [2024-11-13 13:48:37,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:48:37,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920846742] [2024-11-13 13:48:37,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:48:37,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:48:37,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:48:38,211 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 13:48:38,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:48:38,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920846742] [2024-11-13 13:48:38,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920846742] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 13:48:38,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 13:48:38,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-13 13:48:38,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224212927] [2024-11-13 13:48:38,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 13:48:38,212 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-13 13:48:38,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:48:38,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-13 13:48:38,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-11-13 13:48:38,407 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2024-11-13 13:48:38,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 494 transitions, 10977 flow. Second operand has 10 states, 10 states have (on average 22.3) internal successors, (223), 10 states have internal predecessors, (223), 0 states have call successors, (0), 0 states 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 13:48:38,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:48:38,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2024-11-13 13:48:38,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:48:41,238 INFO L124 PetriNetUnfolderBase]: 6675/12326 cut-off events. [2024-11-13 13:48:41,238 INFO L125 PetriNetUnfolderBase]: For 132586/132668 co-relation queries the response was YES. [2024-11-13 13:48:41,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67360 conditions, 12326 events. 6675/12326 cut-off events. For 132586/132668 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 94431 event pairs, 1903 based on Foata normal form. 119/12397 useless extension candidates. Maximal degree in co-relation 65079. Up to 10839 conditions per place. [2024-11-13 13:48:41,364 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 260 selfloop transitions, 230 changer transitions 4/511 dead transitions. [2024-11-13 13:48:41,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 511 transitions, 12024 flow [2024-11-13 13:48:41,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-13 13:48:41,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-13 13:48:41,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 243 transitions. [2024-11-13 13:48:41,365 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-11-13 13:48:41,365 INFO L175 Difference]: Start difference. First operand has 242 places, 494 transitions, 10977 flow. Second operand 9 states and 243 transitions. [2024-11-13 13:48:41,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 511 transitions, 12024 flow [2024-11-13 13:48:42,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 511 transitions, 11484 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-11-13 13:48:42,849 INFO L231 Difference]: Finished difference. Result has 241 places, 493 transitions, 10886 flow [2024-11-13 13:48:42,849 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=10437, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=230, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10886, PETRI_PLACES=241, PETRI_TRANSITIONS=493} [2024-11-13 13:48:42,850 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 195 predicate places. [2024-11-13 13:48:42,850 INFO L471 AbstractCegarLoop]: Abstraction has has 241 places, 493 transitions, 10886 flow [2024-11-13 13:48:42,850 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 22.3) internal successors, (223), 10 states have internal predecessors, (223), 0 states have call successors, (0), 0 states 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 13:48:42,850 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:48:42,850 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:48:42,850 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-11-13 13:48:42,850 INFO L396 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-13 13:48:42,850 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:48:42,850 INFO L85 PathProgramCache]: Analyzing trace with hash -403756510, now seen corresponding path program 10 times [2024-11-13 13:48:42,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:48:42,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499640248] [2024-11-13 13:48:42,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:48:42,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:48:42,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:48:43,105 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 13:48:43,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:48:43,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499640248] [2024-11-13 13:48:43,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499640248] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:48:43,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235816526] [2024-11-13 13:48:43,106 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 13:48:43,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:48:43,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:48:43,107 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:48:43,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-13 13:48:43,209 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 13:48:43,210 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 13:48:43,211 INFO L255 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-13 13:48:43,212 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:48:43,364 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 13:48:43,364 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 29 treesize of output 21 [2024-11-13 13:48:43,384 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 13:48:43,384 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:48:43,563 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-11-13 13:48:43,563 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 13:48:43,613 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 13:48:43,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235816526] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:48:43,614 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 13:48:43,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 16 [2024-11-13 13:48:43,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746600074] [2024-11-13 13:48:43,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 13:48:43,614 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-13 13:48:43,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:48:43,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-13 13:48:43,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2024-11-13 13:48:44,184 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2024-11-13 13:48:44,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 493 transitions, 10886 flow. Second operand has 17 states, 17 states have (on average 22.470588235294116) internal successors, (382), 17 states have internal predecessors, (382), 0 states have call successors, (0), 0 states 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 13:48:44,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:48:44,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2024-11-13 13:48:44,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:48:47,215 INFO L124 PetriNetUnfolderBase]: 6818/12555 cut-off events. [2024-11-13 13:48:47,215 INFO L125 PetriNetUnfolderBase]: For 132909/132991 co-relation queries the response was YES. [2024-11-13 13:48:47,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69238 conditions, 12555 events. 6818/12555 cut-off events. For 132909/132991 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 96029 event pairs, 1706 based on Foata normal form. 192/12701 useless extension candidates. Maximal degree in co-relation 66957. Up to 10579 conditions per place. [2024-11-13 13:48:47,314 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 265 selfloop transitions, 279 changer transitions 0/561 dead transitions. [2024-11-13 13:48:47,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 561 transitions, 12762 flow [2024-11-13 13:48:47,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-13 13:48:47,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-13 13:48:47,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 325 transitions. [2024-11-13 13:48:47,315 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5642361111111112 [2024-11-13 13:48:47,315 INFO L175 Difference]: Start difference. First operand has 241 places, 493 transitions, 10886 flow. Second operand 12 states and 325 transitions. [2024-11-13 13:48:47,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 561 transitions, 12762 flow [2024-11-13 13:48:48,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 561 transitions, 12318 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-11-13 13:48:48,663 INFO L231 Difference]: Finished difference. Result has 248 places, 526 transitions, 11702 flow [2024-11-13 13:48:48,663 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=10442, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=252, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=11702, PETRI_PLACES=248, PETRI_TRANSITIONS=526} [2024-11-13 13:48:48,664 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 202 predicate places. [2024-11-13 13:48:48,664 INFO L471 AbstractCegarLoop]: Abstraction has has 248 places, 526 transitions, 11702 flow [2024-11-13 13:48:48,664 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 22.470588235294116) internal successors, (382), 17 states have internal predecessors, (382), 0 states have call successors, (0), 0 states 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 13:48:48,664 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:48:48,664 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:48:48,684 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-11-13 13:48:48,865 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2024-11-13 13:48:48,865 INFO L396 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-13 13:48:48,865 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:48:48,865 INFO L85 PathProgramCache]: Analyzing trace with hash -876767916, now seen corresponding path program 11 times [2024-11-13 13:48:48,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:48:48,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128399853] [2024-11-13 13:48:48,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:48:48,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:48:48,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:48:49,135 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 13:48:49,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:48:49,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128399853] [2024-11-13 13:48:49,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128399853] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 13:48:49,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 13:48:49,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-13 13:48:49,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078028172] [2024-11-13 13:48:49,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 13:48:49,136 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-13 13:48:49,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:48:49,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-13 13:48:49,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-11-13 13:48:49,316 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2024-11-13 13:48:49,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 526 transitions, 11702 flow. Second operand has 10 states, 10 states have (on average 22.3) internal successors, (223), 10 states have internal predecessors, (223), 0 states have call successors, (0), 0 states 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 13:48:49,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:48:49,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2024-11-13 13:48:49,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:48:52,356 INFO L124 PetriNetUnfolderBase]: 6773/12507 cut-off events. [2024-11-13 13:48:52,356 INFO L125 PetriNetUnfolderBase]: For 138363/138469 co-relation queries the response was YES. [2024-11-13 13:48:52,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69952 conditions, 12507 events. 6773/12507 cut-off events. For 138363/138469 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 95906 event pairs, 1777 based on Foata normal form. 119/12590 useless extension candidates. Maximal degree in co-relation 67992. Up to 11073 conditions per place. [2024-11-13 13:48:52,489 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 295 selfloop transitions, 218 changer transitions 4/534 dead transitions. [2024-11-13 13:48:52,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 534 transitions, 12550 flow [2024-11-13 13:48:52,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-13 13:48:52,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-13 13:48:52,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 243 transitions. [2024-11-13 13:48:52,490 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-11-13 13:48:52,490 INFO L175 Difference]: Start difference. First operand has 248 places, 526 transitions, 11702 flow. Second operand 9 states and 243 transitions. [2024-11-13 13:48:52,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 534 transitions, 12550 flow [2024-11-13 13:48:53,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 534 transitions, 12219 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-11-13 13:48:53,846 INFO L231 Difference]: Finished difference. Result has 249 places, 516 transitions, 11551 flow [2024-11-13 13:48:53,846 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=11126, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=517, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=218, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11551, PETRI_PLACES=249, PETRI_TRANSITIONS=516} [2024-11-13 13:48:53,847 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 203 predicate places. [2024-11-13 13:48:53,847 INFO L471 AbstractCegarLoop]: Abstraction has has 249 places, 516 transitions, 11551 flow [2024-11-13 13:48:53,847 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 22.3) internal successors, (223), 10 states have internal predecessors, (223), 0 states have call successors, (0), 0 states 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 13:48:53,847 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:48:53,847 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:48:53,847 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-11-13 13:48:53,847 INFO L396 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-13 13:48:53,847 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:48:53,847 INFO L85 PathProgramCache]: Analyzing trace with hash -1793226392, now seen corresponding path program 12 times [2024-11-13 13:48:53,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:48:53,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610376174] [2024-11-13 13:48:53,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:48:53,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:48:53,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:48:54,089 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 13:48:54,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:48:54,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610376174] [2024-11-13 13:48:54,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610376174] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:48:54,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031643145] [2024-11-13 13:48:54,089 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-13 13:48:54,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:48:54,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:48:54,091 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:48:54,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-13 13:48:54,193 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-13 13:48:54,193 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 13:48:54,194 INFO L255 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-13 13:48:54,195 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:48:54,373 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 13:48:54,374 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 29 treesize of output 21 [2024-11-13 13:48:54,397 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 13:48:54,398 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:48:54,572 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-11-13 13:48:54,572 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 13:48:54,617 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 13:48:54,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031643145] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:48:54,617 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 13:48:54,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 16 [2024-11-13 13:48:54,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994317194] [2024-11-13 13:48:54,617 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 13:48:54,617 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-13 13:48:54,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:48:54,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-13 13:48:54,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2024-11-13 13:48:55,057 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2024-11-13 13:48:55,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 516 transitions, 11551 flow. Second operand has 17 states, 17 states have (on average 22.470588235294116) internal successors, (382), 17 states have internal predecessors, (382), 0 states have call successors, (0), 0 states 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 13:48:55,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:48:55,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2024-11-13 13:48:55,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:48:58,018 INFO L124 PetriNetUnfolderBase]: 6637/12329 cut-off events. [2024-11-13 13:48:58,018 INFO L125 PetriNetUnfolderBase]: For 134405/134499 co-relation queries the response was YES. [2024-11-13 13:48:58,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69046 conditions, 12329 events. 6637/12329 cut-off events. For 134405/134499 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 94988 event pairs, 1804 based on Foata normal form. 192/12477 useless extension candidates. Maximal degree in co-relation 67725. Up to 10776 conditions per place. [2024-11-13 13:48:58,136 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 295 selfloop transitions, 233 changer transitions 0/545 dead transitions. [2024-11-13 13:48:58,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 545 transitions, 12798 flow [2024-11-13 13:48:58,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-13 13:48:58,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-13 13:48:58,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 273 transitions. [2024-11-13 13:48:58,137 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.56875 [2024-11-13 13:48:58,137 INFO L175 Difference]: Start difference. First operand has 249 places, 516 transitions, 11551 flow. Second operand 10 states and 273 transitions. [2024-11-13 13:48:58,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 545 transitions, 12798 flow [2024-11-13 13:48:59,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 545 transitions, 12316 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-11-13 13:48:59,358 INFO L231 Difference]: Finished difference. Result has 247 places, 516 transitions, 11555 flow [2024-11-13 13:48:59,359 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=11046, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=231, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11555, PETRI_PLACES=247, PETRI_TRANSITIONS=516} [2024-11-13 13:48:59,359 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 201 predicate places. [2024-11-13 13:48:59,359 INFO L471 AbstractCegarLoop]: Abstraction has has 247 places, 516 transitions, 11555 flow [2024-11-13 13:48:59,359 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 22.470588235294116) internal successors, (382), 17 states have internal predecessors, (382), 0 states have call successors, (0), 0 states 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 13:48:59,359 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:48:59,359 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:48:59,387 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-11-13 13:48:59,560 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2024-11-13 13:48:59,560 INFO L396 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-13 13:48:59,560 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:48:59,560 INFO L85 PathProgramCache]: Analyzing trace with hash 211637694, now seen corresponding path program 12 times [2024-11-13 13:48:59,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:48:59,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018005457] [2024-11-13 13:48:59,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:48:59,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:48:59,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:48:59,932 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 13:48:59,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:48:59,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018005457] [2024-11-13 13:48:59,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018005457] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 13:48:59,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 13:48:59,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-13 13:48:59,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047630784] [2024-11-13 13:48:59,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 13:48:59,933 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-13 13:48:59,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:48:59,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-13 13:48:59,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-11-13 13:49:00,195 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2024-11-13 13:49:00,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 516 transitions, 11555 flow. Second operand has 10 states, 10 states have (on average 22.3) internal successors, (223), 10 states have internal predecessors, (223), 0 states have call successors, (0), 0 states 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 13:49:00,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:49:00,196 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2024-11-13 13:49:00,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:49:03,194 INFO L124 PetriNetUnfolderBase]: 6709/12531 cut-off events. [2024-11-13 13:49:03,194 INFO L125 PetriNetUnfolderBase]: For 141238/141500 co-relation queries the response was YES. [2024-11-13 13:49:03,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70321 conditions, 12531 events. 6709/12531 cut-off events. For 141238/141500 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 97409 event pairs, 1746 based on Foata normal form. 98/12567 useless extension candidates. Maximal degree in co-relation 68036. Up to 10991 conditions per place. [2024-11-13 13:49:03,329 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 289 selfloop transitions, 231 changer transitions 8/545 dead transitions. [2024-11-13 13:49:03,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 545 transitions, 12995 flow [2024-11-13 13:49:03,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-13 13:49:03,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-13 13:49:03,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 243 transitions. [2024-11-13 13:49:03,331 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-11-13 13:49:03,331 INFO L175 Difference]: Start difference. First operand has 247 places, 516 transitions, 11555 flow. Second operand 9 states and 243 transitions. [2024-11-13 13:49:03,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 545 transitions, 12995 flow [2024-11-13 13:49:04,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 545 transitions, 12493 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-11-13 13:49:04,624 INFO L231 Difference]: Finished difference. Result has 249 places, 524 transitions, 11800 flow [2024-11-13 13:49:04,624 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=11073, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=222, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11800, PETRI_PLACES=249, PETRI_TRANSITIONS=524} [2024-11-13 13:49:04,625 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 203 predicate places. [2024-11-13 13:49:04,625 INFO L471 AbstractCegarLoop]: Abstraction has has 249 places, 524 transitions, 11800 flow [2024-11-13 13:49:04,625 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 22.3) internal successors, (223), 10 states have internal predecessors, (223), 0 states have call successors, (0), 0 states 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 13:49:04,625 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:49:04,625 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:49:04,625 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-11-13 13:49:04,626 INFO L396 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-13 13:49:04,626 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:49:04,626 INFO L85 PathProgramCache]: Analyzing trace with hash 1916970510, now seen corresponding path program 13 times [2024-11-13 13:49:04,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:49:04,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283706091] [2024-11-13 13:49:04,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:49:04,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:49:04,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:49:04,878 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 13:49:04,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:49:04,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283706091] [2024-11-13 13:49:04,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283706091] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 13:49:04,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 13:49:04,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-13 13:49:04,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714149212] [2024-11-13 13:49:04,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 13:49:04,879 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-13 13:49:04,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:49:04,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-13 13:49:04,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-11-13 13:49:05,074 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2024-11-13 13:49:05,075 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 524 transitions, 11800 flow. Second operand has 10 states, 10 states have (on average 22.3) internal successors, (223), 10 states have internal predecessors, (223), 0 states have call successors, (0), 0 states 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 13:49:05,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:49:05,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2024-11-13 13:49:05,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:49:07,845 INFO L124 PetriNetUnfolderBase]: 6655/12434 cut-off events. [2024-11-13 13:49:07,845 INFO L125 PetriNetUnfolderBase]: For 137512/137774 co-relation queries the response was YES. [2024-11-13 13:49:07,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69666 conditions, 12434 events. 6655/12434 cut-off events. For 137512/137774 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 96632 event pairs, 1840 based on Foata normal form. 98/12472 useless extension candidates. Maximal degree in co-relation 67380. Up to 10991 conditions per place. [2024-11-13 13:49:07,964 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 293 selfloop transitions, 228 changer transitions 6/544 dead transitions. [2024-11-13 13:49:07,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 544 transitions, 12988 flow [2024-11-13 13:49:07,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-13 13:49:07,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-13 13:49:07,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 242 transitions. [2024-11-13 13:49:07,965 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5601851851851852 [2024-11-13 13:49:07,965 INFO L175 Difference]: Start difference. First operand has 249 places, 524 transitions, 11800 flow. Second operand 9 states and 242 transitions. [2024-11-13 13:49:07,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 544 transitions, 12988 flow [2024-11-13 13:49:09,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 544 transitions, 12616 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-11-13 13:49:09,136 INFO L231 Difference]: Finished difference. Result has 253 places, 525 transitions, 11972 flow [2024-11-13 13:49:09,136 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=11434, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=524, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=226, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11972, PETRI_PLACES=253, PETRI_TRANSITIONS=525} [2024-11-13 13:49:09,137 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 207 predicate places. [2024-11-13 13:49:09,137 INFO L471 AbstractCegarLoop]: Abstraction has has 253 places, 525 transitions, 11972 flow [2024-11-13 13:49:09,137 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 22.3) internal successors, (223), 10 states have internal predecessors, (223), 0 states have call successors, (0), 0 states 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 13:49:09,137 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:49:09,137 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:49:09,137 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-11-13 13:49:09,137 INFO L396 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-13 13:49:09,137 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:49:09,137 INFO L85 PathProgramCache]: Analyzing trace with hash -564580714, now seen corresponding path program 14 times [2024-11-13 13:49:09,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:49:09,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951504200] [2024-11-13 13:49:09,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:49:09,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:49:09,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:49:09,555 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 13:49:09,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:49:09,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951504200] [2024-11-13 13:49:09,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951504200] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:49:09,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777963673] [2024-11-13 13:49:09,556 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 13:49:09,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:49:09,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:49:09,557 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:49:09,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-13 13:49:09,663 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 13:49:09,663 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 13:49:09,664 INFO L255 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-13 13:49:09,665 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:49:09,841 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 13:49:09,841 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 29 treesize of output 21 [2024-11-13 13:49:09,872 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 13:49:09,872 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:49:10,026 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-11-13 13:49:10,027 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 13:49:10,074 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 13:49:10,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777963673] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-13 13:49:10,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-13 13:49:10,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9, 9] total 18 [2024-11-13 13:49:10,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251592206] [2024-11-13 13:49:10,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 13:49:10,075 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-13 13:49:10,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:49:10,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-13 13:49:10,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2024-11-13 13:49:10,235 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2024-11-13 13:49:10,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 525 transitions, 11972 flow. Second operand has 8 states, 8 states have (on average 22.875) internal successors, (183), 8 states have internal predecessors, (183), 0 states have call successors, (0), 0 states 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 13:49:10,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:49:10,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2024-11-13 13:49:10,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:49:13,566 INFO L124 PetriNetUnfolderBase]: 6984/13141 cut-off events. [2024-11-13 13:49:13,566 INFO L125 PetriNetUnfolderBase]: For 151153/151415 co-relation queries the response was YES. [2024-11-13 13:49:13,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72990 conditions, 13141 events. 6984/13141 cut-off events. For 151153/151415 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 104019 event pairs, 1753 based on Foata normal form. 198/13277 useless extension candidates. Maximal degree in co-relation 70372. Up to 11073 conditions per place. [2024-11-13 13:49:13,695 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 315 selfloop transitions, 238 changer transitions 0/570 dead transitions. [2024-11-13 13:49:13,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 570 transitions, 13575 flow [2024-11-13 13:49:13,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-13 13:49:13,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-13 13:49:13,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 273 transitions. [2024-11-13 13:49:13,696 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.56875 [2024-11-13 13:49:13,696 INFO L175 Difference]: Start difference. First operand has 253 places, 525 transitions, 11972 flow. Second operand 10 states and 273 transitions. [2024-11-13 13:49:13,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 570 transitions, 13575 flow [2024-11-13 13:49:14,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 570 transitions, 13080 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-11-13 13:49:14,819 INFO L231 Difference]: Finished difference. Result has 253 places, 538 transitions, 12308 flow [2024-11-13 13:49:14,820 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=11477, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=525, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=225, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12308, PETRI_PLACES=253, PETRI_TRANSITIONS=538} [2024-11-13 13:49:14,820 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 207 predicate places. [2024-11-13 13:49:14,820 INFO L471 AbstractCegarLoop]: Abstraction has has 253 places, 538 transitions, 12308 flow [2024-11-13 13:49:14,820 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 22.875) internal successors, (183), 8 states have internal predecessors, (183), 0 states have call successors, (0), 0 states 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 13:49:14,820 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:49:14,820 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:49:14,834 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-11-13 13:49:15,021 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2024-11-13 13:49:15,021 INFO L396 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-13 13:49:15,021 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:49:15,021 INFO L85 PathProgramCache]: Analyzing trace with hash -692772386, now seen corresponding path program 15 times [2024-11-13 13:49:15,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:49:15,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003440686] [2024-11-13 13:49:15,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:49:15,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:49:15,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:49:15,492 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 13:49:15,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:49:15,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003440686] [2024-11-13 13:49:15,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003440686] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:49:15,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395624770] [2024-11-13 13:49:15,492 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 13:49:15,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:49:15,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:49:15,494 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:49:15,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-13 13:49:15,599 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-13 13:49:15,600 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 13:49:15,601 INFO L255 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-13 13:49:15,602 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:49:15,755 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 13:49:15,755 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 29 treesize of output 21 [2024-11-13 13:49:15,785 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 13:49:15,785 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:49:15,937 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-11-13 13:49:15,937 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 13:49:15,987 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 13:49:15,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395624770] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:49:15,987 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 13:49:15,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 17 [2024-11-13 13:49:15,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205884829] [2024-11-13 13:49:15,988 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 13:49:15,988 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-13 13:49:15,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:49:15,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-13 13:49:15,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2024-11-13 13:49:16,499 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2024-11-13 13:49:16,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 538 transitions, 12308 flow. Second operand has 18 states, 18 states have (on average 22.555555555555557) internal successors, (406), 18 states have internal predecessors, (406), 0 states have call successors, (0), 0 states 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 13:49:16,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:49:16,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2024-11-13 13:49:16,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:49:20,133 INFO L124 PetriNetUnfolderBase]: 7724/14631 cut-off events. [2024-11-13 13:49:20,133 INFO L125 PetriNetUnfolderBase]: For 174668/174930 co-relation queries the response was YES. [2024-11-13 13:49:20,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81537 conditions, 14631 events. 7724/14631 cut-off events. For 174668/174930 co-relation queries the response was YES. Maximal size of possible extension queue 570. Compared 118719 event pairs, 1954 based on Foata normal form. 198/14761 useless extension candidates. Maximal degree in co-relation 78911. Up to 11744 conditions per place. [2024-11-13 13:49:20,268 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 322 selfloop transitions, 309 changer transitions 0/648 dead transitions. [2024-11-13 13:49:20,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 648 transitions, 15333 flow [2024-11-13 13:49:20,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-13 13:49:20,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-13 13:49:20,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 386 transitions. [2024-11-13 13:49:20,269 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5744047619047619 [2024-11-13 13:49:20,269 INFO L175 Difference]: Start difference. First operand has 253 places, 538 transitions, 12308 flow. Second operand 14 states and 386 transitions. [2024-11-13 13:49:20,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 648 transitions, 15333 flow [2024-11-13 13:49:21,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 648 transitions, 14824 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-11-13 13:49:21,981 INFO L231 Difference]: Finished difference. Result has 262 places, 598 transitions, 14090 flow [2024-11-13 13:49:21,981 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=11849, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=251, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=14090, PETRI_PLACES=262, PETRI_TRANSITIONS=598} [2024-11-13 13:49:21,981 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 216 predicate places. [2024-11-13 13:49:21,981 INFO L471 AbstractCegarLoop]: Abstraction has has 262 places, 598 transitions, 14090 flow [2024-11-13 13:49:21,982 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 22.555555555555557) internal successors, (406), 18 states have internal predecessors, (406), 0 states have call successors, (0), 0 states 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 13:49:21,982 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:49:21,982 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:49:21,994 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-11-13 13:49:22,182 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33db0e0b-50b7-4649-8fc7-97b66a991d83/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:49:22,182 INFO L396 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-13 13:49:22,182 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:49:22,183 INFO L85 PathProgramCache]: Analyzing trace with hash 978745118, now seen corresponding path program 16 times [2024-11-13 13:49:22,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:49:22,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183460743] [2024-11-13 13:49:22,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:49:22,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:49:22,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:49:22,449 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 13:49:22,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:49:22,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183460743] [2024-11-13 13:49:22,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183460743] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 13:49:22,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 13:49:22,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-13 13:49:22,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351839506] [2024-11-13 13:49:22,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 13:49:22,450 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-13 13:49:22,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:49:22,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-13 13:49:22,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-11-13 13:49:22,630 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2024-11-13 13:49:22,630 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 598 transitions, 14090 flow. Second operand has 10 states, 10 states have (on average 22.3) internal successors, (223), 10 states have internal predecessors, (223), 0 states have call successors, (0), 0 states 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 13:49:22,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:49:22,630 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2024-11-13 13:49:22,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand