./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 6497de01 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a560fb4-0743-4c44-95a3-b95ef674b09a/bin/uautomizer-verify-LYvppIcaGC/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a560fb4-0743-4c44-95a3-b95ef674b09a/bin/uautomizer-verify-LYvppIcaGC/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a560fb4-0743-4c44-95a3-b95ef674b09a/bin/uautomizer-verify-LYvppIcaGC/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a560fb4-0743-4c44-95a3-b95ef674b09a/bin/uautomizer-verify-LYvppIcaGC/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a560fb4-0743-4c44-95a3-b95ef674b09a/bin/uautomizer-verify-LYvppIcaGC/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a560fb4-0743-4c44-95a3-b95ef674b09a/bin/uautomizer-verify-LYvppIcaGC --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash fbe9f324c9eba6beb8c990e3f85f0b00a68548fe05ffdb4e97bc061354d1cdf2 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-6497de0 [2024-11-23 18:24:43,944 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-23 18:24:44,066 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a560fb4-0743-4c44-95a3-b95ef674b09a/bin/uautomizer-verify-LYvppIcaGC/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-23 18:24:44,077 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-23 18:24:44,081 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-23 18:24:44,107 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-23 18:24:44,108 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-23 18:24:44,108 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-23 18:24:44,108 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-23 18:24:44,109 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-23 18:24:44,109 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-23 18:24:44,109 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-23 18:24:44,109 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-23 18:24:44,110 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-23 18:24:44,110 INFO L153 SettingsManager]: * Use SBE=true [2024-11-23 18:24:44,110 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-23 18:24:44,110 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-23 18:24:44,113 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-23 18:24:44,113 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-23 18:24:44,113 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-23 18:24:44,113 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-23 18:24:44,113 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-23 18:24:44,113 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-23 18:24:44,113 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-23 18:24:44,114 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-23 18:24:44,114 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-23 18:24:44,114 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-23 18:24:44,114 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-23 18:24:44,114 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-23 18:24:44,114 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-23 18:24:44,114 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-23 18:24:44,114 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-23 18:24:44,115 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-23 18:24:44,115 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 18:24:44,115 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-23 18:24:44,115 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-23 18:24:44,115 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-23 18:24:44,115 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-23 18:24:44,115 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 18:24:44,116 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-23 18:24:44,116 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-23 18:24:44,116 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-23 18:24:44,116 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-23 18:24:44,116 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-23 18:24:44,116 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-23 18:24:44,116 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-23 18:24:44,116 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-23 18:24:44,118 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_2a560fb4-0743-4c44-95a3-b95ef674b09a/bin/uautomizer-verify-LYvppIcaGC Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fbe9f324c9eba6beb8c990e3f85f0b00a68548fe05ffdb4e97bc061354d1cdf2 [2024-11-23 18:24:44,481 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-23 18:24:44,491 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-23 18:24:44,494 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-23 18:24:44,495 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-23 18:24:44,496 INFO L274 PluginConnector]: CDTParser initialized [2024-11-23 18:24:44,497 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a560fb4-0743-4c44-95a3-b95ef674b09a/bin/uautomizer-verify-LYvppIcaGC/../../sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c [2024-11-23 18:24:48,085 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a560fb4-0743-4c44-95a3-b95ef674b09a/bin/uautomizer-verify-LYvppIcaGC/data/8a79ab590/f9e90ba22c364f1e814d0f55020b57fa/FLAG2cc5d5592 [2024-11-23 18:24:48,423 INFO L384 CDTParser]: Found 1 translation units. [2024-11-23 18:24:48,424 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a560fb4-0743-4c44-95a3-b95ef674b09a/sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c [2024-11-23 18:24:48,434 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a560fb4-0743-4c44-95a3-b95ef674b09a/bin/uautomizer-verify-LYvppIcaGC/data/8a79ab590/f9e90ba22c364f1e814d0f55020b57fa/FLAG2cc5d5592 [2024-11-23 18:24:48,453 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a560fb4-0743-4c44-95a3-b95ef674b09a/bin/uautomizer-verify-LYvppIcaGC/data/8a79ab590/f9e90ba22c364f1e814d0f55020b57fa [2024-11-23 18:24:48,457 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-23 18:24:48,458 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-23 18:24:48,460 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-23 18:24:48,460 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-23 18:24:48,466 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-23 18:24:48,467 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 06:24:48" (1/1) ... [2024-11-23 18:24:48,468 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e6d977 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:24:48, skipping insertion in model container [2024-11-23 18:24:48,469 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 06:24:48" (1/1) ... [2024-11-23 18:24:48,491 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-23 18:24:48,772 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-23 18:24:48,778 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-23 18:24:48,794 INFO L200 MainTranslator]: Completed pre-run [2024-11-23 18:24:48,845 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-23 18:24:48,877 INFO L204 MainTranslator]: Completed translation [2024-11-23 18:24:48,877 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:24:48 WrapperNode [2024-11-23 18:24:48,878 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-23 18:24:48,879 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-23 18:24:48,879 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-23 18:24:48,879 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-23 18:24:48,894 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:24:48" (1/1) ... [2024-11-23 18:24:48,904 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:24:48" (1/1) ... [2024-11-23 18:24:48,949 INFO L138 Inliner]: procedures = 23, calls = 36, calls flagged for inlining = 14, calls inlined = 16, statements flattened = 189 [2024-11-23 18:24:48,953 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-23 18:24:48,953 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-23 18:24:48,954 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-23 18:24:48,954 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-23 18:24:48,966 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:24:48" (1/1) ... [2024-11-23 18:24:48,967 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:24:48" (1/1) ... [2024-11-23 18:24:48,971 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:24:48" (1/1) ... [2024-11-23 18:24:49,010 INFO L175 MemorySlicer]: Split 14 memory accesses to 2 slices as follows [2, 12]. 86 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]. [2024-11-23 18:24:49,010 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:24:48" (1/1) ... [2024-11-23 18:24:49,010 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:24:48" (1/1) ... [2024-11-23 18:24:49,027 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:24:48" (1/1) ... [2024-11-23 18:24:49,032 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:24:48" (1/1) ... [2024-11-23 18:24:49,040 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:24:48" (1/1) ... [2024-11-23 18:24:49,041 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:24:48" (1/1) ... [2024-11-23 18:24:49,047 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:24:48" (1/1) ... [2024-11-23 18:24:49,053 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-23 18:24:49,054 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-23 18:24:49,054 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-23 18:24:49,054 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-23 18:24:49,055 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:24:48" (1/1) ... [2024-11-23 18:24:49,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 18:24:49,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a560fb4-0743-4c44-95a3-b95ef674b09a/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:24:49,112 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a560fb4-0743-4c44-95a3-b95ef674b09a/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-23 18:24:49,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a560fb4-0743-4c44-95a3-b95ef674b09a/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-23 18:24:49,161 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-23 18:24:49,161 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-23 18:24:49,161 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-23 18:24:49,162 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-23 18:24:49,162 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-23 18:24:49,162 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-23 18:24:49,162 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-23 18:24:49,162 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-23 18:24:49,162 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-23 18:24:49,162 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-23 18:24:49,163 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-23 18:24:49,163 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-23 18:24:49,163 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-23 18:24:49,163 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-23 18:24:49,163 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-23 18:24:49,163 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-23 18:24:49,167 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-23 18:24:49,292 INFO L234 CfgBuilder]: Building ICFG [2024-11-23 18:24:49,295 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-23 18:24:50,048 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-23 18:24:50,049 INFO L283 CfgBuilder]: Performing block encoding [2024-11-23 18:24:50,835 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-23 18:24:50,835 INFO L312 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-23 18:24:50,836 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 06:24:50 BoogieIcfgContainer [2024-11-23 18:24:50,836 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-23 18:24:50,839 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-23 18:24:50,840 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-23 18:24:50,849 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-23 18:24:50,850 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 06:24:48" (1/3) ... [2024-11-23 18:24:50,850 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e3c0300 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 06:24:50, skipping insertion in model container [2024-11-23 18:24:50,851 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:24:48" (2/3) ... [2024-11-23 18:24:50,851 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e3c0300 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 06:24:50, skipping insertion in model container [2024-11-23 18:24:50,851 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 06:24:50" (3/3) ... [2024-11-23 18:24:50,852 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-counter-fun.wvr.c [2024-11-23 18:24:50,872 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-23 18:24:50,874 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-counter-fun.wvr.c that has 3 procedures, 51 locations, 1 initial locations, 4 loop locations, and 26 error locations. [2024-11-23 18:24:50,875 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-23 18:24:51,011 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-23 18:24:51,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 57 places, 54 transitions, 122 flow [2024-11-23 18:24:51,130 INFO L124 PetriNetUnfolderBase]: 4/52 cut-off events. [2024-11-23 18:24:51,140 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-23 18:24:51,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61 conditions, 52 events. 4/52 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 153 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 35. Up to 2 conditions per place. [2024-11-23 18:24:51,144 INFO L82 GeneralOperation]: Start removeDead. Operand has 57 places, 54 transitions, 122 flow [2024-11-23 18:24:51,149 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 54 places, 51 transitions, 114 flow [2024-11-23 18:24:51,158 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-23 18:24:51,173 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;@115cee48, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-23 18:24:51,173 INFO L334 AbstractCegarLoop]: Starting to check reachability of 48 error locations. [2024-11-23 18:24:51,178 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-23 18:24:51,178 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-23 18:24:51,178 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-23 18:24:51,178 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:24:51,179 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-23 18:24:51,179 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2024-11-23 18:24:51,186 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:24:51,186 INFO L85 PathProgramCache]: Analyzing trace with hash 661212, now seen corresponding path program 1 times [2024-11-23 18:24:51,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:24:51,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453274552] [2024-11-23 18:24:51,196 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:24:51,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:24:51,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:24:51,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:24:51,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:24:51,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453274552] [2024-11-23 18:24:51,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453274552] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:24:51,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:24:51,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-23 18:24:51,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101843520] [2024-11-23 18:24:51,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:24:51,573 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-23 18:24:51,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:24:51,608 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-23 18:24:51,609 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-23 18:24:51,651 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 54 [2024-11-23 18:24:51,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 51 transitions, 114 flow. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:24:51,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:24:51,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 54 [2024-11-23 18:24:51,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:24:52,036 INFO L124 PetriNetUnfolderBase]: 219/390 cut-off events. [2024-11-23 18:24:52,037 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2024-11-23 18:24:52,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 799 conditions, 390 events. 219/390 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 1945 event pairs, 182 based on Foata normal form. 1/240 useless extension candidates. Maximal degree in co-relation 729. Up to 373 conditions per place. [2024-11-23 18:24:52,046 INFO L140 encePairwiseOnDemand]: 37/54 looper letters, 28 selfloop transitions, 2 changer transitions 0/35 dead transitions. [2024-11-23 18:24:52,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 35 transitions, 142 flow [2024-11-23 18:24:52,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-23 18:24:52,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-23 18:24:52,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 69 transitions. [2024-11-23 18:24:52,072 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-11-23 18:24:52,074 INFO L175 Difference]: Start difference. First operand has 54 places, 51 transitions, 114 flow. Second operand 3 states and 69 transitions. [2024-11-23 18:24:52,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 35 transitions, 142 flow [2024-11-23 18:24:52,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 35 transitions, 134 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-23 18:24:52,091 INFO L231 Difference]: Finished difference. Result has 36 places, 35 transitions, 78 flow [2024-11-23 18:24:52,095 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=78, PETRI_PLACES=36, PETRI_TRANSITIONS=35} [2024-11-23 18:24:52,103 INFO L279 CegarLoopForPetriNet]: 54 programPoint places, -18 predicate places. [2024-11-23 18:24:52,104 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 35 transitions, 78 flow [2024-11-23 18:24:52,104 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:24:52,104 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:24:52,104 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-23 18:24:52,104 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-23 18:24:52,105 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2024-11-23 18:24:52,105 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:24:52,107 INFO L85 PathProgramCache]: Analyzing trace with hash 661213, now seen corresponding path program 1 times [2024-11-23 18:24:52,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:24:52,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760574889] [2024-11-23 18:24:52,108 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:24:52,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:24:52,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:24:52,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:24:52,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:24:52,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760574889] [2024-11-23 18:24:52,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760574889] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:24:52,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:24:52,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-23 18:24:52,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59356521] [2024-11-23 18:24:52,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:24:52,609 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 18:24:52,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:24:52,610 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 18:24:52,610 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-23 18:24:52,638 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 54 [2024-11-23 18:24:52,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 35 transitions, 78 flow. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:24:52,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:24:52,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 54 [2024-11-23 18:24:52,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:24:53,008 INFO L124 PetriNetUnfolderBase]: 220/393 cut-off events. [2024-11-23 18:24:53,008 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-23 18:24:53,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 790 conditions, 393 events. 220/393 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 1955 event pairs, 182 based on Foata normal form. 0/240 useless extension candidates. Maximal degree in co-relation 761. Up to 382 conditions per place. [2024-11-23 18:24:53,014 INFO L140 encePairwiseOnDemand]: 49/54 looper letters, 31 selfloop transitions, 4 changer transitions 0/38 dead transitions. [2024-11-23 18:24:53,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 38 transitions, 154 flow [2024-11-23 18:24:53,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-23 18:24:53,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-23 18:24:53,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 68 transitions. [2024-11-23 18:24:53,018 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3148148148148148 [2024-11-23 18:24:53,018 INFO L175 Difference]: Start difference. First operand has 36 places, 35 transitions, 78 flow. Second operand 4 states and 68 transitions. [2024-11-23 18:24:53,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 38 transitions, 154 flow [2024-11-23 18:24:53,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 38 transitions, 150 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-23 18:24:53,023 INFO L231 Difference]: Finished difference. Result has 39 places, 38 transitions, 101 flow [2024-11-23 18:24:53,023 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=101, PETRI_PLACES=39, PETRI_TRANSITIONS=38} [2024-11-23 18:24:53,024 INFO L279 CegarLoopForPetriNet]: 54 programPoint places, -15 predicate places. [2024-11-23 18:24:53,025 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 38 transitions, 101 flow [2024-11-23 18:24:53,025 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:24:53,025 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:24:53,026 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-23 18:24:53,026 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-23 18:24:53,026 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2024-11-23 18:24:53,027 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:24:53,029 INFO L85 PathProgramCache]: Analyzing trace with hash 20499636, now seen corresponding path program 1 times [2024-11-23 18:24:53,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:24:53,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672746669] [2024-11-23 18:24:53,030 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:24:53,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:24:53,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:24:53,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:24:53,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:24:53,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672746669] [2024-11-23 18:24:53,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672746669] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:24:53,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:24:53,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-23 18:24:53,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325023736] [2024-11-23 18:24:53,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:24:53,462 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-23 18:24:53,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:24:53,463 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-23 18:24:53,463 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-23 18:24:53,493 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 54 [2024-11-23 18:24:53,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 38 transitions, 101 flow. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:24:53,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:24:53,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 54 [2024-11-23 18:24:53,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:24:53,830 INFO L124 PetriNetUnfolderBase]: 221/396 cut-off events. [2024-11-23 18:24:53,830 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-23 18:24:53,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 807 conditions, 396 events. 221/396 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 1982 event pairs, 182 based on Foata normal form. 0/242 useless extension candidates. Maximal degree in co-relation 782. Up to 381 conditions per place. [2024-11-23 18:24:53,839 INFO L140 encePairwiseOnDemand]: 46/54 looper letters, 31 selfloop transitions, 7 changer transitions 0/41 dead transitions. [2024-11-23 18:24:53,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 41 transitions, 183 flow [2024-11-23 18:24:53,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-23 18:24:53,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-23 18:24:53,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 79 transitions. [2024-11-23 18:24:53,843 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.29259259259259257 [2024-11-23 18:24:53,843 INFO L175 Difference]: Start difference. First operand has 39 places, 38 transitions, 101 flow. Second operand 5 states and 79 transitions. [2024-11-23 18:24:53,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 41 transitions, 183 flow [2024-11-23 18:24:53,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 41 transitions, 180 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-23 18:24:53,847 INFO L231 Difference]: Finished difference. Result has 44 places, 41 transitions, 135 flow [2024-11-23 18:24:53,847 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=135, PETRI_PLACES=44, PETRI_TRANSITIONS=41} [2024-11-23 18:24:53,849 INFO L279 CegarLoopForPetriNet]: 54 programPoint places, -10 predicate places. [2024-11-23 18:24:53,849 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 41 transitions, 135 flow [2024-11-23 18:24:53,850 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:24:53,850 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:24:53,850 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-23 18:24:53,850 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-23 18:24:53,850 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2024-11-23 18:24:53,851 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:24:53,851 INFO L85 PathProgramCache]: Analyzing trace with hash 635447841, now seen corresponding path program 1 times [2024-11-23 18:24:53,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:24:53,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661410358] [2024-11-23 18:24:53,852 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:24:53,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:24:53,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:24:54,371 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:24:54,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:24:54,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661410358] [2024-11-23 18:24:54,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661410358] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 18:24:54,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577854758] [2024-11-23 18:24:54,372 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:24:54,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:24:54,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a560fb4-0743-4c44-95a3-b95ef674b09a/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:24:54,375 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a560fb4-0743-4c44-95a3-b95ef674b09a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:24:54,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a560fb4-0743-4c44-95a3-b95ef674b09a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-23 18:24:54,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:24:54,493 INFO L256 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-23 18:24:54,500 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:24:54,614 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 [2024-11-23 18:24:54,835 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:24:54,835 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 18:24:54,989 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:24:54,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577854758] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 18:24:54,990 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 18:24:54,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-23 18:24:54,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946430079] [2024-11-23 18:24:54,990 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 18:24:54,991 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-23 18:24:54,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:24:54,991 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-23 18:24:54,994 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-11-23 18:24:55,090 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 54 [2024-11-23 18:24:55,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 41 transitions, 135 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:24:55,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:24:55,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 54 [2024-11-23 18:24:55,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:24:55,590 INFO L124 PetriNetUnfolderBase]: 222/398 cut-off events. [2024-11-23 18:24:55,591 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-11-23 18:24:55,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 830 conditions, 398 events. 222/398 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 1991 event pairs, 182 based on Foata normal form. 0/247 useless extension candidates. Maximal degree in co-relation 792. Up to 382 conditions per place. [2024-11-23 18:24:55,595 INFO L140 encePairwiseOnDemand]: 49/54 looper letters, 30 selfloop transitions, 10 changer transitions 0/43 dead transitions. [2024-11-23 18:24:55,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 43 transitions, 226 flow [2024-11-23 18:24:55,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-23 18:24:55,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-23 18:24:55,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 103 transitions. [2024-11-23 18:24:55,597 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.23842592592592593 [2024-11-23 18:24:55,598 INFO L175 Difference]: Start difference. First operand has 44 places, 41 transitions, 135 flow. Second operand 8 states and 103 transitions. [2024-11-23 18:24:55,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 43 transitions, 226 flow [2024-11-23 18:24:55,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 43 transitions, 225 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-23 18:24:55,600 INFO L231 Difference]: Finished difference. Result has 49 places, 43 transitions, 165 flow [2024-11-23 18:24:55,601 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=165, PETRI_PLACES=49, PETRI_TRANSITIONS=43} [2024-11-23 18:24:55,601 INFO L279 CegarLoopForPetriNet]: 54 programPoint places, -5 predicate places. [2024-11-23 18:24:55,602 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 43 transitions, 165 flow [2024-11-23 18:24:55,602 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:24:55,602 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:24:55,602 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-11-23 18:24:55,615 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a560fb4-0743-4c44-95a3-b95ef674b09a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-23 18:24:55,807 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a560fb4-0743-4c44-95a3-b95ef674b09a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:24:55,807 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2024-11-23 18:24:55,808 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:24:55,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1774663636, now seen corresponding path program 1 times [2024-11-23 18:24:55,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:24:55,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571084289] [2024-11-23 18:24:55,809 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:24:55,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:24:55,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:24:56,244 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:24:56,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:24:56,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571084289] [2024-11-23 18:24:56,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571084289] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 18:24:56,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748045205] [2024-11-23 18:24:56,245 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:24:56,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:24:56,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a560fb4-0743-4c44-95a3-b95ef674b09a/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:24:56,247 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a560fb4-0743-4c44-95a3-b95ef674b09a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:24:56,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a560fb4-0743-4c44-95a3-b95ef674b09a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-23 18:24:56,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:24:56,385 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-23 18:24:56,387 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:24:56,412 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-23 18:24:56,709 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:24:56,710 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 18:24:56,968 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:24:56,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748045205] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 18:24:56,968 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 18:24:56,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-23 18:24:56,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646739683] [2024-11-23 18:24:56,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 18:24:56,969 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-23 18:24:56,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:24:56,970 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-23 18:24:56,970 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-11-23 18:24:57,080 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 54 [2024-11-23 18:24:57,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 43 transitions, 165 flow. Second operand has 13 states, 13 states have (on average 9.307692307692308) internal successors, (121), 13 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:24:57,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:24:57,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 54 [2024-11-23 18:24:57,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:24:57,739 INFO L124 PetriNetUnfolderBase]: 223/400 cut-off events. [2024-11-23 18:24:57,739 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-11-23 18:24:57,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 846 conditions, 400 events. 223/400 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 2002 event pairs, 182 based on Foata normal form. 0/249 useless extension candidates. Maximal degree in co-relation 800. Up to 374 conditions per place. [2024-11-23 18:24:57,745 INFO L140 encePairwiseOnDemand]: 46/54 looper letters, 24 selfloop transitions, 18 changer transitions 0/45 dead transitions. [2024-11-23 18:24:57,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 45 transitions, 257 flow [2024-11-23 18:24:57,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-23 18:24:57,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-23 18:24:57,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 116 transitions. [2024-11-23 18:24:57,750 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.23868312757201646 [2024-11-23 18:24:57,750 INFO L175 Difference]: Start difference. First operand has 49 places, 43 transitions, 165 flow. Second operand 9 states and 116 transitions. [2024-11-23 18:24:57,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 45 transitions, 257 flow [2024-11-23 18:24:57,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 45 transitions, 210 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-11-23 18:24:57,754 INFO L231 Difference]: Finished difference. Result has 48 places, 45 transitions, 162 flow [2024-11-23 18:24:57,755 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=162, PETRI_PLACES=48, PETRI_TRANSITIONS=45} [2024-11-23 18:24:57,756 INFO L279 CegarLoopForPetriNet]: 54 programPoint places, -6 predicate places. [2024-11-23 18:24:57,756 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 45 transitions, 162 flow [2024-11-23 18:24:57,756 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.307692307692308) internal successors, (121), 13 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:24:57,756 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:24:57,757 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:24:57,768 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a560fb4-0743-4c44-95a3-b95ef674b09a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-23 18:24:57,958 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a560fb4-0743-4c44-95a3-b95ef674b09a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:24:57,958 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2024-11-23 18:24:57,959 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:24:57,959 INFO L85 PathProgramCache]: Analyzing trace with hash 822242414, now seen corresponding path program 1 times [2024-11-23 18:24:57,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:24:57,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868854614] [2024-11-23 18:24:57,959 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:24:57,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:24:57,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:24:58,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:24:58,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:24:58,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868854614] [2024-11-23 18:24:58,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868854614] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:24:58,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:24:58,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-23 18:24:58,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658652946] [2024-11-23 18:24:58,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:24:58,100 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 18:24:58,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:24:58,101 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 18:24:58,101 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-23 18:24:58,112 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 54 [2024-11-23 18:24:58,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 45 transitions, 162 flow. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:24:58,113 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:24:58,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 54 [2024-11-23 18:24:58,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:24:58,446 INFO L124 PetriNetUnfolderBase]: 286/532 cut-off events. [2024-11-23 18:24:58,446 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-11-23 18:24:58,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1120 conditions, 532 events. 286/532 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 2755 event pairs, 213 based on Foata normal form. 15/372 useless extension candidates. Maximal degree in co-relation 701. Up to 395 conditions per place. [2024-11-23 18:24:58,450 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 63 selfloop transitions, 4 changer transitions 0/70 dead transitions. [2024-11-23 18:24:58,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 70 transitions, 388 flow [2024-11-23 18:24:58,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-23 18:24:58,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-23 18:24:58,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 97 transitions. [2024-11-23 18:24:58,453 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.44907407407407407 [2024-11-23 18:24:58,453 INFO L175 Difference]: Start difference. First operand has 48 places, 45 transitions, 162 flow. Second operand 4 states and 97 transitions. [2024-11-23 18:24:58,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 70 transitions, 388 flow [2024-11-23 18:24:58,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 70 transitions, 335 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-11-23 18:24:58,459 INFO L231 Difference]: Finished difference. Result has 47 places, 46 transitions, 153 flow [2024-11-23 18:24:58,459 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=153, PETRI_PLACES=47, PETRI_TRANSITIONS=46} [2024-11-23 18:24:58,461 INFO L279 CegarLoopForPetriNet]: 54 programPoint places, -7 predicate places. [2024-11-23 18:24:58,462 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 46 transitions, 153 flow [2024-11-23 18:24:58,462 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:24:58,462 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:24:58,463 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:24:58,463 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-23 18:24:58,463 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2024-11-23 18:24:58,464 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:24:58,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1957347918, now seen corresponding path program 1 times [2024-11-23 18:24:58,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:24:58,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806696566] [2024-11-23 18:24:58,464 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:24:58,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:24:58,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:24:58,805 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 18:24:58,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:24:58,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806696566] [2024-11-23 18:24:58,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806696566] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 18:24:58,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601686381] [2024-11-23 18:24:58,807 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:24:58,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:24:58,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a560fb4-0743-4c44-95a3-b95ef674b09a/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:24:58,811 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a560fb4-0743-4c44-95a3-b95ef674b09a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:24:58,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a560fb4-0743-4c44-95a3-b95ef674b09a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-23 18:24:58,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:24:58,938 INFO L256 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-23 18:24:58,940 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:24:58,955 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-23 18:24:59,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-23 18:24:59,059 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-23 18:24:59,077 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-23 18:24:59,077 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-23 18:24:59,145 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 18:24:59,145 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 18:24:59,334 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 [2024-11-23 18:24:59,494 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 18:24:59,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601686381] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 18:24:59,495 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 18:24:59,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-23 18:24:59,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434508638] [2024-11-23 18:24:59,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 18:24:59,495 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-23 18:24:59,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:24:59,496 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-23 18:24:59,496 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-11-23 18:24:59,677 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 54 [2024-11-23 18:24:59,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 46 transitions, 153 flow. Second operand has 11 states, 11 states have (on average 10.181818181818182) internal successors, (112), 11 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:24:59,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:24:59,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 54 [2024-11-23 18:24:59,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:25:00,790 INFO L124 PetriNetUnfolderBase]: 685/1246 cut-off events. [2024-11-23 18:25:00,791 INFO L125 PetriNetUnfolderBase]: For 125/125 co-relation queries the response was YES. [2024-11-23 18:25:00,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2820 conditions, 1246 events. 685/1246 cut-off events. For 125/125 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 7266 event pairs, 308 based on Foata normal form. 1/844 useless extension candidates. Maximal degree in co-relation 1913. Up to 386 conditions per place. [2024-11-23 18:25:00,800 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 88 selfloop transitions, 20 changer transitions 1/112 dead transitions. [2024-11-23 18:25:00,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 112 transitions, 560 flow [2024-11-23 18:25:00,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-23 18:25:00,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-23 18:25:00,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-11-23 18:25:00,803 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.360082304526749 [2024-11-23 18:25:00,803 INFO L175 Difference]: Start difference. First operand has 47 places, 46 transitions, 153 flow. Second operand 9 states and 175 transitions. [2024-11-23 18:25:00,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 112 transitions, 560 flow [2024-11-23 18:25:00,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 112 transitions, 554 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-23 18:25:00,807 INFO L231 Difference]: Finished difference. Result has 57 places, 57 transitions, 272 flow [2024-11-23 18:25:00,807 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=147, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=272, PETRI_PLACES=57, PETRI_TRANSITIONS=57} [2024-11-23 18:25:00,808 INFO L279 CegarLoopForPetriNet]: 54 programPoint places, 3 predicate places. [2024-11-23 18:25:00,808 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 57 transitions, 272 flow [2024-11-23 18:25:00,808 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.181818181818182) internal successors, (112), 11 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:25:00,809 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:25:00,809 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:25:00,821 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a560fb4-0743-4c44-95a3-b95ef674b09a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-23 18:25:01,013 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a560fb4-0743-4c44-95a3-b95ef674b09a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-23 18:25:01,013 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2024-11-23 18:25:01,015 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:25:01,015 INFO L85 PathProgramCache]: Analyzing trace with hash -1957347919, now seen corresponding path program 1 times [2024-11-23 18:25:01,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:25:01,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463907156] [2024-11-23 18:25:01,016 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:25:01,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:25:01,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:25:01,140 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-23 18:25:01,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:25:01,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463907156] [2024-11-23 18:25:01,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463907156] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:25:01,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:25:01,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-23 18:25:01,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910804897] [2024-11-23 18:25:01,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:25:01,141 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 18:25:01,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:25:01,141 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 18:25:01,141 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-23 18:25:01,162 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 54 [2024-11-23 18:25:01,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 57 transitions, 272 flow. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:25:01,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:25:01,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 54 [2024-11-23 18:25:01,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:25:01,442 INFO L124 PetriNetUnfolderBase]: 517/962 cut-off events. [2024-11-23 18:25:01,442 INFO L125 PetriNetUnfolderBase]: For 1007/1007 co-relation queries the response was YES. [2024-11-23 18:25:01,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2552 conditions, 962 events. 517/962 cut-off events. For 1007/1007 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 5321 event pairs, 391 based on Foata normal form. 53/835 useless extension candidates. Maximal degree in co-relation 1839. Up to 883 conditions per place. [2024-11-23 18:25:01,451 INFO L140 encePairwiseOnDemand]: 49/54 looper letters, 42 selfloop transitions, 10 changer transitions 0/55 dead transitions. [2024-11-23 18:25:01,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 55 transitions, 370 flow [2024-11-23 18:25:01,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-23 18:25:01,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-23 18:25:01,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 70 transitions. [2024-11-23 18:25:01,453 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.25925925925925924 [2024-11-23 18:25:01,453 INFO L175 Difference]: Start difference. First operand has 57 places, 57 transitions, 272 flow. Second operand 5 states and 70 transitions. [2024-11-23 18:25:01,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 55 transitions, 370 flow [2024-11-23 18:25:01,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 55 transitions, 370 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-23 18:25:01,462 INFO L231 Difference]: Finished difference. Result has 59 places, 55 transitions, 286 flow [2024-11-23 18:25:01,463 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=286, PETRI_PLACES=59, PETRI_TRANSITIONS=55} [2024-11-23 18:25:01,464 INFO L279 CegarLoopForPetriNet]: 54 programPoint places, 5 predicate places. [2024-11-23 18:25:01,466 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 55 transitions, 286 flow [2024-11-23 18:25:01,466 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:25:01,466 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:25:01,466 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:25:01,466 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-23 18:25:01,467 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2024-11-23 18:25:01,467 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:25:01,467 INFO L85 PathProgramCache]: Analyzing trace with hash -1957347913, now seen corresponding path program 1 times [2024-11-23 18:25:01,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:25:01,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957678984] [2024-11-23 18:25:01,468 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:25:01,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:25:01,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:25:01,569 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 18:25:01,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:25:01,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957678984] [2024-11-23 18:25:01,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957678984] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:25:01,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:25:01,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-23 18:25:01,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400825784] [2024-11-23 18:25:01,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:25:01,570 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 18:25:01,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:25:01,570 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 18:25:01,570 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-23 18:25:01,586 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 54 [2024-11-23 18:25:01,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 55 transitions, 286 flow. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:25:01,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:25:01,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 54 [2024-11-23 18:25:01,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:25:01,831 INFO L124 PetriNetUnfolderBase]: 378/727 cut-off events. [2024-11-23 18:25:01,831 INFO L125 PetriNetUnfolderBase]: For 832/832 co-relation queries the response was YES. [2024-11-23 18:25:01,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1908 conditions, 727 events. 378/727 cut-off events. For 832/832 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 3714 event pairs, 280 based on Foata normal form. 0/662 useless extension candidates. Maximal degree in co-relation 1374. Up to 655 conditions per place. [2024-11-23 18:25:01,837 INFO L140 encePairwiseOnDemand]: 50/54 looper letters, 42 selfloop transitions, 7 changer transitions 0/52 dead transitions. [2024-11-23 18:25:01,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 52 transitions, 368 flow [2024-11-23 18:25:01,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-23 18:25:01,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-23 18:25:01,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 60 transitions. [2024-11-23 18:25:01,838 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.2777777777777778 [2024-11-23 18:25:01,839 INFO L175 Difference]: Start difference. First operand has 59 places, 55 transitions, 286 flow. Second operand 4 states and 60 transitions. [2024-11-23 18:25:01,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 52 transitions, 368 flow [2024-11-23 18:25:01,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 52 transitions, 354 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-23 18:25:01,843 INFO L231 Difference]: Finished difference. Result has 57 places, 52 transitions, 270 flow [2024-11-23 18:25:01,843 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=270, PETRI_PLACES=57, PETRI_TRANSITIONS=52} [2024-11-23 18:25:01,844 INFO L279 CegarLoopForPetriNet]: 54 programPoint places, 3 predicate places. [2024-11-23 18:25:01,844 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 52 transitions, 270 flow [2024-11-23 18:25:01,845 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:25:01,845 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:25:01,845 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:25:01,845 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-23 18:25:01,845 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2024-11-23 18:25:01,846 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:25:01,846 INFO L85 PathProgramCache]: Analyzing trace with hash -1957347912, now seen corresponding path program 1 times [2024-11-23 18:25:01,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:25:01,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101133481] [2024-11-23 18:25:01,846 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:25:01,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:25:01,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:25:02,034 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 18:25:02,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:25:02,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101133481] [2024-11-23 18:25:02,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101133481] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:25:02,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:25:02,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-23 18:25:02,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283936246] [2024-11-23 18:25:02,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:25:02,035 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 18:25:02,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:25:02,036 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 18:25:02,036 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-23 18:25:02,050 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 54 [2024-11-23 18:25:02,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 52 transitions, 270 flow. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:25:02,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:25:02,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 54 [2024-11-23 18:25:02,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:25:02,362 INFO L124 PetriNetUnfolderBase]: 420/837 cut-off events. [2024-11-23 18:25:02,363 INFO L125 PetriNetUnfolderBase]: For 993/993 co-relation queries the response was YES. [2024-11-23 18:25:02,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2131 conditions, 837 events. 420/837 cut-off events. For 993/993 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 4353 event pairs, 324 based on Foata normal form. 30/820 useless extension candidates. Maximal degree in co-relation 1597. Up to 671 conditions per place. [2024-11-23 18:25:02,369 INFO L140 encePairwiseOnDemand]: 46/54 looper letters, 53 selfloop transitions, 6 changer transitions 1/63 dead transitions. [2024-11-23 18:25:02,369 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 63 transitions, 418 flow [2024-11-23 18:25:02,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-23 18:25:02,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-23 18:25:02,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 85 transitions. [2024-11-23 18:25:02,370 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.39351851851851855 [2024-11-23 18:25:02,371 INFO L175 Difference]: Start difference. First operand has 57 places, 52 transitions, 270 flow. Second operand 4 states and 85 transitions. [2024-11-23 18:25:02,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 63 transitions, 418 flow [2024-11-23 18:25:02,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 63 transitions, 410 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-23 18:25:02,379 INFO L231 Difference]: Finished difference. Result has 59 places, 51 transitions, 278 flow [2024-11-23 18:25:02,379 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=278, PETRI_PLACES=59, PETRI_TRANSITIONS=51} [2024-11-23 18:25:02,380 INFO L279 CegarLoopForPetriNet]: 54 programPoint places, 5 predicate places. [2024-11-23 18:25:02,380 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 51 transitions, 278 flow [2024-11-23 18:25:02,380 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:25:02,380 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:25:02,380 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:25:02,380 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-23 18:25:02,380 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2024-11-23 18:25:02,381 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:25:02,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1965642176, now seen corresponding path program 1 times [2024-11-23 18:25:02,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:25:02,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839579845] [2024-11-23 18:25:02,381 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:25:02,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:25:02,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:25:02,802 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 18:25:02,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:25:02,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839579845] [2024-11-23 18:25:02,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839579845] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 18:25:02,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144069263] [2024-11-23 18:25:02,803 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:25:02,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:25:02,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a560fb4-0743-4c44-95a3-b95ef674b09a/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:25:02,806 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a560fb4-0743-4c44-95a3-b95ef674b09a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:25:02,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a560fb4-0743-4c44-95a3-b95ef674b09a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-23 18:25:02,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:25:02,934 INFO L256 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-23 18:25:02,937 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:25:03,046 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 18:25:03,046 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 18:25:03,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144069263] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:25:03,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-23 18:25:03,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2024-11-23 18:25:03,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237188224] [2024-11-23 18:25:03,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:25:03,047 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-23 18:25:03,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:25:03,048 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-23 18:25:03,048 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-11-23 18:25:03,071 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 54 [2024-11-23 18:25:03,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 51 transitions, 278 flow. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:25:03,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:25:03,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 54 [2024-11-23 18:25:03,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:25:03,301 INFO L124 PetriNetUnfolderBase]: 281/581 cut-off events. [2024-11-23 18:25:03,301 INFO L125 PetriNetUnfolderBase]: For 893/893 co-relation queries the response was YES. [2024-11-23 18:25:03,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1537 conditions, 581 events. 281/581 cut-off events. For 893/893 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2699 event pairs, 209 based on Foata normal form. 37/603 useless extension candidates. Maximal degree in co-relation 1136. Up to 511 conditions per place. [2024-11-23 18:25:03,305 INFO L140 encePairwiseOnDemand]: 50/54 looper letters, 37 selfloop transitions, 8 changer transitions 0/48 dead transitions. [2024-11-23 18:25:03,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 48 transitions, 348 flow [2024-11-23 18:25:03,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-23 18:25:03,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-23 18:25:03,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 66 transitions. [2024-11-23 18:25:03,307 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3055555555555556 [2024-11-23 18:25:03,307 INFO L175 Difference]: Start difference. First operand has 59 places, 51 transitions, 278 flow. Second operand 4 states and 66 transitions. [2024-11-23 18:25:03,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 48 transitions, 348 flow [2024-11-23 18:25:03,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 48 transitions, 339 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-11-23 18:25:03,311 INFO L231 Difference]: Finished difference. Result has 59 places, 48 transitions, 265 flow [2024-11-23 18:25:03,311 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=249, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=265, PETRI_PLACES=59, PETRI_TRANSITIONS=48} [2024-11-23 18:25:03,312 INFO L279 CegarLoopForPetriNet]: 54 programPoint places, 5 predicate places. [2024-11-23 18:25:03,312 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 48 transitions, 265 flow [2024-11-23 18:25:03,312 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:25:03,312 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:25:03,312 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:25:03,324 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a560fb4-0743-4c44-95a3-b95ef674b09a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-23 18:25:03,515 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a560fb4-0743-4c44-95a3-b95ef674b09a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-23 18:25:03,516 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2024-11-23 18:25:03,516 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:25:03,516 INFO L85 PathProgramCache]: Analyzing trace with hash -957223464, now seen corresponding path program 1 times [2024-11-23 18:25:03,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:25:03,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389407948] [2024-11-23 18:25:03,517 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:25:03,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:25:03,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:25:03,704 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 18:25:03,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:25:03,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389407948] [2024-11-23 18:25:03,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389407948] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:25:03,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:25:03,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-23 18:25:03,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143058012] [2024-11-23 18:25:03,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:25:03,706 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 18:25:03,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:25:03,707 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 18:25:03,707 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-23 18:25:03,717 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 54 [2024-11-23 18:25:03,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 48 transitions, 265 flow. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:25:03,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:25:03,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 54 [2024-11-23 18:25:03,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:25:03,921 INFO L124 PetriNetUnfolderBase]: 254/535 cut-off events. [2024-11-23 18:25:03,921 INFO L125 PetriNetUnfolderBase]: For 625/625 co-relation queries the response was YES. [2024-11-23 18:25:03,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1395 conditions, 535 events. 254/535 cut-off events. For 625/625 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2375 event pairs, 197 based on Foata normal form. 8/543 useless extension candidates. Maximal degree in co-relation 1047. Up to 378 conditions per place. [2024-11-23 18:25:03,926 INFO L140 encePairwiseOnDemand]: 49/54 looper letters, 57 selfloop transitions, 3 changer transitions 0/63 dead transitions. [2024-11-23 18:25:03,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 63 transitions, 423 flow [2024-11-23 18:25:03,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-23 18:25:03,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-23 18:25:03,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 83 transitions. [2024-11-23 18:25:03,928 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.38425925925925924 [2024-11-23 18:25:03,928 INFO L175 Difference]: Start difference. First operand has 59 places, 48 transitions, 265 flow. Second operand 4 states and 83 transitions. [2024-11-23 18:25:03,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 63 transitions, 423 flow [2024-11-23 18:25:03,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 63 transitions, 412 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-23 18:25:03,933 INFO L231 Difference]: Finished difference. Result has 61 places, 47 transitions, 253 flow [2024-11-23 18:25:03,934 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=253, PETRI_PLACES=61, PETRI_TRANSITIONS=47} [2024-11-23 18:25:03,938 INFO L279 CegarLoopForPetriNet]: 54 programPoint places, 7 predicate places. [2024-11-23 18:25:03,938 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 47 transitions, 253 flow [2024-11-23 18:25:03,938 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:25:03,938 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:25:03,938 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:25:03,939 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-23 18:25:03,939 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2024-11-23 18:25:03,939 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:25:03,939 INFO L85 PathProgramCache]: Analyzing trace with hash 758283548, now seen corresponding path program 1 times [2024-11-23 18:25:03,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:25:03,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670075234] [2024-11-23 18:25:03,939 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:25:03,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:25:03,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:25:04,346 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-23 18:25:04,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:25:04,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670075234] [2024-11-23 18:25:04,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670075234] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:25:04,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:25:04,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-23 18:25:04,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608334931] [2024-11-23 18:25:04,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:25:04,348 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-23 18:25:04,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:25:04,349 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-23 18:25:04,349 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-23 18:25:04,377 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 54 [2024-11-23 18:25:04,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 47 transitions, 253 flow. Second operand has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:25:04,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:25:04,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 54 [2024-11-23 18:25:04,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:25:04,544 INFO L124 PetriNetUnfolderBase]: 193/426 cut-off events. [2024-11-23 18:25:04,545 INFO L125 PetriNetUnfolderBase]: For 518/518 co-relation queries the response was YES. [2024-11-23 18:25:04,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1063 conditions, 426 events. 193/426 cut-off events. For 518/518 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1798 event pairs, 146 based on Foata normal form. 34/455 useless extension candidates. Maximal degree in co-relation 862. Up to 375 conditions per place. [2024-11-23 18:25:04,548 INFO L140 encePairwiseOnDemand]: 50/54 looper letters, 38 selfloop transitions, 4 changer transitions 0/45 dead transitions. [2024-11-23 18:25:04,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 45 transitions, 321 flow [2024-11-23 18:25:04,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-23 18:25:04,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-23 18:25:04,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 56 transitions. [2024-11-23 18:25:04,551 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.25925925925925924 [2024-11-23 18:25:04,551 INFO L175 Difference]: Start difference. First operand has 61 places, 47 transitions, 253 flow. Second operand 4 states and 56 transitions. [2024-11-23 18:25:04,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 45 transitions, 321 flow [2024-11-23 18:25:04,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 45 transitions, 306 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-11-23 18:25:04,555 INFO L231 Difference]: Finished difference. Result has 56 places, 45 transitions, 230 flow [2024-11-23 18:25:04,556 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=230, PETRI_PLACES=56, PETRI_TRANSITIONS=45} [2024-11-23 18:25:04,557 INFO L279 CegarLoopForPetriNet]: 54 programPoint places, 2 predicate places. [2024-11-23 18:25:04,558 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 45 transitions, 230 flow [2024-11-23 18:25:04,559 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:25:04,559 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:25:04,559 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:25:04,559 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-23 18:25:04,559 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2024-11-23 18:25:04,560 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:25:04,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1228728262, now seen corresponding path program 1 times [2024-11-23 18:25:04,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:25:04,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821152481] [2024-11-23 18:25:04,560 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:25:04,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:25:04,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:25:04,611 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:25:04,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:25:04,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821152481] [2024-11-23 18:25:04,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821152481] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:25:04,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:25:04,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-23 18:25:04,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450758104] [2024-11-23 18:25:04,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:25:04,613 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-23 18:25:04,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:25:04,613 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-23 18:25:04,614 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-23 18:25:04,614 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 54 [2024-11-23 18:25:04,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 45 transitions, 230 flow. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:25:04,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:25:04,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 54 [2024-11-23 18:25:04,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:25:04,746 INFO L124 PetriNetUnfolderBase]: 193/418 cut-off events. [2024-11-23 18:25:04,746 INFO L125 PetriNetUnfolderBase]: For 233/233 co-relation queries the response was YES. [2024-11-23 18:25:04,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1022 conditions, 418 events. 193/418 cut-off events. For 233/233 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1653 event pairs, 81 based on Foata normal form. 2/416 useless extension candidates. Maximal degree in co-relation 716. Up to 204 conditions per place. [2024-11-23 18:25:04,749 INFO L140 encePairwiseOnDemand]: 50/54 looper letters, 42 selfloop transitions, 3 changer transitions 6/54 dead transitions. [2024-11-23 18:25:04,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 54 transitions, 353 flow [2024-11-23 18:25:04,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-23 18:25:04,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-23 18:25:04,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 64 transitions. [2024-11-23 18:25:04,751 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3950617283950617 [2024-11-23 18:25:04,751 INFO L175 Difference]: Start difference. First operand has 56 places, 45 transitions, 230 flow. Second operand 3 states and 64 transitions. [2024-11-23 18:25:04,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 54 transitions, 353 flow [2024-11-23 18:25:04,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 54 transitions, 348 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-23 18:25:04,754 INFO L231 Difference]: Finished difference. Result has 57 places, 40 transitions, 190 flow [2024-11-23 18:25:04,754 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=225, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=190, PETRI_PLACES=57, PETRI_TRANSITIONS=40} [2024-11-23 18:25:04,755 INFO L279 CegarLoopForPetriNet]: 54 programPoint places, 3 predicate places. [2024-11-23 18:25:04,755 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 40 transitions, 190 flow [2024-11-23 18:25:04,755 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:25:04,756 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:25:04,756 INFO L206 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] [2024-11-23 18:25:04,756 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-23 18:25:04,756 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2024-11-23 18:25:04,757 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:25:04,757 INFO L85 PathProgramCache]: Analyzing trace with hash -550237207, now seen corresponding path program 1 times [2024-11-23 18:25:04,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:25:04,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069607697] [2024-11-23 18:25:04,757 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:25:04,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:25:04,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:25:04,893 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-23 18:25:04,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:25:04,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069607697] [2024-11-23 18:25:04,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069607697] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:25:04,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:25:04,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-23 18:25:04,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442801193] [2024-11-23 18:25:04,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:25:04,894 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-23 18:25:04,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:25:04,895 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-23 18:25:04,895 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-23 18:25:04,902 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 54 [2024-11-23 18:25:04,902 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 40 transitions, 190 flow. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:25:04,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:25:04,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 54 [2024-11-23 18:25:04,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:25:05,131 INFO L124 PetriNetUnfolderBase]: 315/551 cut-off events. [2024-11-23 18:25:05,131 INFO L125 PetriNetUnfolderBase]: For 274/274 co-relation queries the response was YES. [2024-11-23 18:25:05,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1433 conditions, 551 events. 315/551 cut-off events. For 274/274 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2164 event pairs, 124 based on Foata normal form. 0/465 useless extension candidates. Maximal degree in co-relation 1389. Up to 358 conditions per place. [2024-11-23 18:25:05,135 INFO L140 encePairwiseOnDemand]: 46/54 looper letters, 57 selfloop transitions, 11 changer transitions 0/69 dead transitions. [2024-11-23 18:25:05,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 69 transitions, 432 flow [2024-11-23 18:25:05,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-23 18:25:05,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-23 18:25:05,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 92 transitions. [2024-11-23 18:25:05,137 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.34074074074074073 [2024-11-23 18:25:05,137 INFO L175 Difference]: Start difference. First operand has 57 places, 40 transitions, 190 flow. Second operand 5 states and 92 transitions. [2024-11-23 18:25:05,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 69 transitions, 432 flow [2024-11-23 18:25:05,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 69 transitions, 392 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-11-23 18:25:05,142 INFO L231 Difference]: Finished difference. Result has 55 places, 50 transitions, 240 flow [2024-11-23 18:25:05,142 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=240, PETRI_PLACES=55, PETRI_TRANSITIONS=50} [2024-11-23 18:25:05,142 INFO L279 CegarLoopForPetriNet]: 54 programPoint places, 1 predicate places. [2024-11-23 18:25:05,143 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 50 transitions, 240 flow [2024-11-23 18:25:05,143 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:25:05,143 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:25:05,143 INFO L206 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] [2024-11-23 18:25:05,143 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-23 18:25:05,143 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2024-11-23 18:25:05,144 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:25:05,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1015905912, now seen corresponding path program 1 times [2024-11-23 18:25:05,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:25:05,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7093340] [2024-11-23 18:25:05,145 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:25:05,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:25:05,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:25:05,246 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-23 18:25:05,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:25:05,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7093340] [2024-11-23 18:25:05,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7093340] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:25:05,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:25:05,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-23 18:25:05,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058770933] [2024-11-23 18:25:05,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:25:05,248 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-23 18:25:05,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:25:05,248 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-23 18:25:05,249 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-23 18:25:05,259 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 54 [2024-11-23 18:25:05,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 50 transitions, 240 flow. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:25:05,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:25:05,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 54 [2024-11-23 18:25:05,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:25:05,486 INFO L124 PetriNetUnfolderBase]: 277/510 cut-off events. [2024-11-23 18:25:05,486 INFO L125 PetriNetUnfolderBase]: For 401/401 co-relation queries the response was YES. [2024-11-23 18:25:05,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1615 conditions, 510 events. 277/510 cut-off events. For 401/401 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2162 event pairs, 84 based on Foata normal form. 3/502 useless extension candidates. Maximal degree in co-relation 1574. Up to 252 conditions per place. [2024-11-23 18:25:05,491 INFO L140 encePairwiseOnDemand]: 48/54 looper letters, 59 selfloop transitions, 6 changer transitions 6/74 dead transitions. [2024-11-23 18:25:05,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 74 transitions, 480 flow [2024-11-23 18:25:05,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-23 18:25:05,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-23 18:25:05,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 94 transitions. [2024-11-23 18:25:05,492 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.34814814814814815 [2024-11-23 18:25:05,492 INFO L175 Difference]: Start difference. First operand has 55 places, 50 transitions, 240 flow. Second operand 5 states and 94 transitions. [2024-11-23 18:25:05,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 74 transitions, 480 flow [2024-11-23 18:25:05,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 74 transitions, 480 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-23 18:25:05,496 INFO L231 Difference]: Finished difference. Result has 61 places, 50 transitions, 260 flow [2024-11-23 18:25:05,497 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=260, PETRI_PLACES=61, PETRI_TRANSITIONS=50} [2024-11-23 18:25:05,497 INFO L279 CegarLoopForPetriNet]: 54 programPoint places, 7 predicate places. [2024-11-23 18:25:05,497 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 50 transitions, 260 flow [2024-11-23 18:25:05,497 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:25:05,498 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:25:05,498 INFO L206 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] [2024-11-23 18:25:05,498 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-23 18:25:05,498 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2024-11-23 18:25:05,499 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:25:05,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1276092192, now seen corresponding path program 2 times [2024-11-23 18:25:05,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:25:05,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628477882] [2024-11-23 18:25:05,500 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 18:25:05,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:25:05,528 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 18:25:05,529 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 18:25:05,616 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-23 18:25:05,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:25:05,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628477882] [2024-11-23 18:25:05,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628477882] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 18:25:05,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817422651] [2024-11-23 18:25:05,617 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 18:25:05,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:25:05,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a560fb4-0743-4c44-95a3-b95ef674b09a/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:25:05,620 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a560fb4-0743-4c44-95a3-b95ef674b09a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:25:05,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a560fb4-0743-4c44-95a3-b95ef674b09a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-23 18:25:05,755 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 18:25:05,755 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 18:25:05,757 INFO L256 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-23 18:25:05,759 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:25:05,825 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-23 18:25:05,826 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 18:25:05,867 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-23 18:25:05,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817422651] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 18:25:05,867 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 18:25:05,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2024-11-23 18:25:05,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913614832] [2024-11-23 18:25:05,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 18:25:05,868 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-23 18:25:05,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:25:05,870 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-23 18:25:05,871 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-11-23 18:25:05,884 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 54 [2024-11-23 18:25:05,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 50 transitions, 260 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:25:05,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:25:05,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 54 [2024-11-23 18:25:05,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:25:06,427 INFO L124 PetriNetUnfolderBase]: 474/823 cut-off events. [2024-11-23 18:25:06,427 INFO L125 PetriNetUnfolderBase]: For 881/881 co-relation queries the response was YES. [2024-11-23 18:25:06,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2845 conditions, 823 events. 474/823 cut-off events. For 881/881 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 3487 event pairs, 22 based on Foata normal form. 12/833 useless extension candidates. Maximal degree in co-relation 2801. Up to 207 conditions per place. [2024-11-23 18:25:06,436 INFO L140 encePairwiseOnDemand]: 46/54 looper letters, 95 selfloop transitions, 45 changer transitions 1/142 dead transitions. [2024-11-23 18:25:06,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 142 transitions, 995 flow [2024-11-23 18:25:06,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-23 18:25:06,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-23 18:25:06,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 207 transitions. [2024-11-23 18:25:06,440 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.27380952380952384 [2024-11-23 18:25:06,440 INFO L175 Difference]: Start difference. First operand has 61 places, 50 transitions, 260 flow. Second operand 14 states and 207 transitions. [2024-11-23 18:25:06,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 142 transitions, 995 flow [2024-11-23 18:25:06,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 142 transitions, 937 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-11-23 18:25:06,454 INFO L231 Difference]: Finished difference. Result has 77 places, 87 transitions, 592 flow [2024-11-23 18:25:06,454 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=592, PETRI_PLACES=77, PETRI_TRANSITIONS=87} [2024-11-23 18:25:06,455 INFO L279 CegarLoopForPetriNet]: 54 programPoint places, 23 predicate places. [2024-11-23 18:25:06,455 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 87 transitions, 592 flow [2024-11-23 18:25:06,456 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:25:06,456 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:25:06,456 INFO L206 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] [2024-11-23 18:25:06,468 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a560fb4-0743-4c44-95a3-b95ef674b09a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-23 18:25:06,657 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a560fb4-0743-4c44-95a3-b95ef674b09a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-23 18:25:06,658 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2024-11-23 18:25:06,658 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:25:06,658 INFO L85 PathProgramCache]: Analyzing trace with hash -2108727955, now seen corresponding path program 2 times [2024-11-23 18:25:06,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:25:06,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786255886] [2024-11-23 18:25:06,659 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 18:25:06,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:25:06,689 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 18:25:06,690 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 18:25:06,798 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-23 18:25:06,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:25:06,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786255886] [2024-11-23 18:25:06,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786255886] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 18:25:06,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368634536] [2024-11-23 18:25:06,799 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 18:25:06,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:25:06,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a560fb4-0743-4c44-95a3-b95ef674b09a/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:25:06,801 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a560fb4-0743-4c44-95a3-b95ef674b09a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:25:06,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a560fb4-0743-4c44-95a3-b95ef674b09a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-23 18:25:06,933 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 18:25:06,933 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 18:25:06,935 INFO L256 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-23 18:25:06,936 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:25:06,974 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-23 18:25:06,976 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 18:25:07,014 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-23 18:25:07,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368634536] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 18:25:07,015 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 18:25:07,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2024-11-23 18:25:07,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164921473] [2024-11-23 18:25:07,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 18:25:07,016 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-23 18:25:07,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:25:07,016 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-23 18:25:07,016 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-11-23 18:25:07,028 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 54 [2024-11-23 18:25:07,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 87 transitions, 592 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:25:07,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:25:07,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 54 [2024-11-23 18:25:07,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:25:07,584 INFO L124 PetriNetUnfolderBase]: 537/932 cut-off events. [2024-11-23 18:25:07,585 INFO L125 PetriNetUnfolderBase]: For 1835/1835 co-relation queries the response was YES. [2024-11-23 18:25:07,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3855 conditions, 932 events. 537/932 cut-off events. For 1835/1835 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 4116 event pairs, 14 based on Foata normal form. 13/943 useless extension candidates. Maximal degree in co-relation 3805. Up to 220 conditions per place. [2024-11-23 18:25:07,594 INFO L140 encePairwiseOnDemand]: 46/54 looper letters, 114 selfloop transitions, 72 changer transitions 0/187 dead transitions. [2024-11-23 18:25:07,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 187 transitions, 1562 flow [2024-11-23 18:25:07,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-23 18:25:07,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-23 18:25:07,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 213 transitions. [2024-11-23 18:25:07,597 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.28174603174603174 [2024-11-23 18:25:07,597 INFO L175 Difference]: Start difference. First operand has 77 places, 87 transitions, 592 flow. Second operand 14 states and 213 transitions. [2024-11-23 18:25:07,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 187 transitions, 1562 flow [2024-11-23 18:25:07,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 187 transitions, 1530 flow, removed 16 selfloop flow, removed 0 redundant places. [2024-11-23 18:25:07,613 INFO L231 Difference]: Finished difference. Result has 94 places, 126 transitions, 1084 flow [2024-11-23 18:25:07,614 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=567, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1084, PETRI_PLACES=94, PETRI_TRANSITIONS=126} [2024-11-23 18:25:07,614 INFO L279 CegarLoopForPetriNet]: 54 programPoint places, 40 predicate places. [2024-11-23 18:25:07,615 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 126 transitions, 1084 flow [2024-11-23 18:25:07,615 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:25:07,615 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:25:07,615 INFO L206 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] [2024-11-23 18:25:07,627 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a560fb4-0743-4c44-95a3-b95ef674b09a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-23 18:25:07,819 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a560fb4-0743-4c44-95a3-b95ef674b09a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-23 18:25:07,819 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2024-11-23 18:25:07,820 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:25:07,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1968947394, now seen corresponding path program 3 times [2024-11-23 18:25:07,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:25:07,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761843398] [2024-11-23 18:25:07,820 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-23 18:25:07,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:25:07,845 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-23 18:25:07,845 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 18:25:07,948 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-23 18:25:07,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:25:07,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761843398] [2024-11-23 18:25:07,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761843398] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 18:25:07,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663869630] [2024-11-23 18:25:07,949 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-23 18:25:07,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:25:07,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a560fb4-0743-4c44-95a3-b95ef674b09a/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:25:07,954 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a560fb4-0743-4c44-95a3-b95ef674b09a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:25:07,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a560fb4-0743-4c44-95a3-b95ef674b09a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-23 18:25:08,084 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-23 18:25:08,084 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 18:25:08,086 INFO L256 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-23 18:25:08,087 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:25:08,138 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-23 18:25:08,138 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 18:25:08,182 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-23 18:25:08,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663869630] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 18:25:08,182 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 18:25:08,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2024-11-23 18:25:08,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545532746] [2024-11-23 18:25:08,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 18:25:08,183 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-23 18:25:08,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:25:08,184 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-23 18:25:08,184 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2024-11-23 18:25:08,195 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 54 [2024-11-23 18:25:08,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 126 transitions, 1084 flow. Second operand has 11 states, 11 states have (on average 10.909090909090908) internal successors, (120), 11 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:25:08,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:25:08,196 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 54 [2024-11-23 18:25:08,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:25:08,660 INFO L124 PetriNetUnfolderBase]: 582/1003 cut-off events. [2024-11-23 18:25:08,660 INFO L125 PetriNetUnfolderBase]: For 3346/3346 co-relation queries the response was YES. [2024-11-23 18:25:08,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4705 conditions, 1003 events. 582/1003 cut-off events. For 3346/3346 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 4490 event pairs, 99 based on Foata normal form. 8/1009 useless extension candidates. Maximal degree in co-relation 4650. Up to 427 conditions per place. [2024-11-23 18:25:08,671 INFO L140 encePairwiseOnDemand]: 46/54 looper letters, 116 selfloop transitions, 55 changer transitions 0/172 dead transitions. [2024-11-23 18:25:08,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 172 transitions, 1728 flow [2024-11-23 18:25:08,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-23 18:25:08,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-23 18:25:08,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-11-23 18:25:08,673 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.32175925925925924 [2024-11-23 18:25:08,673 INFO L175 Difference]: Start difference. First operand has 94 places, 126 transitions, 1084 flow. Second operand 8 states and 139 transitions. [2024-11-23 18:25:08,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 172 transitions, 1728 flow [2024-11-23 18:25:08,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 172 transitions, 1624 flow, removed 39 selfloop flow, removed 1 redundant places. [2024-11-23 18:25:08,699 INFO L231 Difference]: Finished difference. Result has 102 places, 134 transitions, 1209 flow [2024-11-23 18:25:08,701 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=996, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1209, PETRI_PLACES=102, PETRI_TRANSITIONS=134} [2024-11-23 18:25:08,702 INFO L279 CegarLoopForPetriNet]: 54 programPoint places, 48 predicate places. [2024-11-23 18:25:08,702 INFO L471 AbstractCegarLoop]: Abstraction has has 102 places, 134 transitions, 1209 flow [2024-11-23 18:25:08,702 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.909090909090908) internal successors, (120), 11 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:25:08,702 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:25:08,703 INFO L206 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] [2024-11-23 18:25:08,715 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a560fb4-0743-4c44-95a3-b95ef674b09a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-23 18:25:08,903 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a560fb4-0743-4c44-95a3-b95ef674b09a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:25:08,904 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2024-11-23 18:25:08,904 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:25:08,906 INFO L85 PathProgramCache]: Analyzing trace with hash 1483190573, now seen corresponding path program 3 times [2024-11-23 18:25:08,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:25:08,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507168082] [2024-11-23 18:25:08,907 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-23 18:25:08,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:25:08,937 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-23 18:25:08,938 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 18:25:09,042 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-23 18:25:09,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:25:09,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507168082] [2024-11-23 18:25:09,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507168082] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:25:09,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:25:09,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-23 18:25:09,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066737646] [2024-11-23 18:25:09,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:25:09,044 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-23 18:25:09,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:25:09,044 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-23 18:25:09,044 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-23 18:25:09,055 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 54 [2024-11-23 18:25:09,055 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 134 transitions, 1209 flow. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:25:09,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:25:09,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 54 [2024-11-23 18:25:09,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:25:09,382 INFO L124 PetriNetUnfolderBase]: 526/941 cut-off events. [2024-11-23 18:25:09,383 INFO L125 PetriNetUnfolderBase]: For 3669/3670 co-relation queries the response was YES. [2024-11-23 18:25:09,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4542 conditions, 941 events. 526/941 cut-off events. For 3669/3670 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 4397 event pairs, 112 based on Foata normal form. 2/921 useless extension candidates. Maximal degree in co-relation 4485. Up to 540 conditions per place. [2024-11-23 18:25:09,394 INFO L140 encePairwiseOnDemand]: 48/54 looper letters, 116 selfloop transitions, 23 changer transitions 4/160 dead transitions. [2024-11-23 18:25:09,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 160 transitions, 1683 flow [2024-11-23 18:25:09,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-23 18:25:09,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-23 18:25:09,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 90 transitions. [2024-11-23 18:25:09,396 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2024-11-23 18:25:09,396 INFO L175 Difference]: Start difference. First operand has 102 places, 134 transitions, 1209 flow. Second operand 5 states and 90 transitions. [2024-11-23 18:25:09,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 160 transitions, 1683 flow [2024-11-23 18:25:09,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 160 transitions, 1571 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-11-23 18:25:09,419 INFO L231 Difference]: Finished difference. Result has 104 places, 134 transitions, 1168 flow [2024-11-23 18:25:09,419 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1113, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1168, PETRI_PLACES=104, PETRI_TRANSITIONS=134} [2024-11-23 18:25:09,420 INFO L279 CegarLoopForPetriNet]: 54 programPoint places, 50 predicate places. [2024-11-23 18:25:09,420 INFO L471 AbstractCegarLoop]: Abstraction has has 104 places, 134 transitions, 1168 flow [2024-11-23 18:25:09,420 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:25:09,420 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:25:09,420 INFO L206 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] [2024-11-23 18:25:09,421 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-11-23 18:25:09,421 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2024-11-23 18:25:09,421 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:25:09,422 INFO L85 PathProgramCache]: Analyzing trace with hash 917803996, now seen corresponding path program 4 times [2024-11-23 18:25:09,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:25:09,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225650309] [2024-11-23 18:25:09,422 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-23 18:25:09,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:25:09,438 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-23 18:25:09,439 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 18:25:09,483 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-23 18:25:09,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:25:09,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225650309] [2024-11-23 18:25:09,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225650309] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:25:09,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:25:09,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-23 18:25:09,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297070911] [2024-11-23 18:25:09,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:25:09,486 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-23 18:25:09,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:25:09,487 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-23 18:25:09,487 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-23 18:25:09,495 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 54 [2024-11-23 18:25:09,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 134 transitions, 1168 flow. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:25:09,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:25:09,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 54 [2024-11-23 18:25:09,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:25:09,856 INFO L124 PetriNetUnfolderBase]: 582/1006 cut-off events. [2024-11-23 18:25:09,856 INFO L125 PetriNetUnfolderBase]: For 3260/3260 co-relation queries the response was YES. [2024-11-23 18:25:09,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4719 conditions, 1006 events. 582/1006 cut-off events. For 3260/3260 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 4502 event pairs, 147 based on Foata normal form. 3/1007 useless extension candidates. Maximal degree in co-relation 4661. Up to 616 conditions per place. [2024-11-23 18:25:09,869 INFO L140 encePairwiseOnDemand]: 48/54 looper letters, 124 selfloop transitions, 29 changer transitions 4/158 dead transitions. [2024-11-23 18:25:09,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 158 transitions, 1650 flow [2024-11-23 18:25:09,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-23 18:25:09,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-23 18:25:09,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 89 transitions. [2024-11-23 18:25:09,873 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3296296296296296 [2024-11-23 18:25:09,874 INFO L175 Difference]: Start difference. First operand has 104 places, 134 transitions, 1168 flow. Second operand 5 states and 89 transitions. [2024-11-23 18:25:09,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 158 transitions, 1650 flow [2024-11-23 18:25:09,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 158 transitions, 1569 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-11-23 18:25:09,901 INFO L231 Difference]: Finished difference. Result has 104 places, 133 transitions, 1142 flow [2024-11-23 18:25:09,901 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1090, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1142, PETRI_PLACES=104, PETRI_TRANSITIONS=133} [2024-11-23 18:25:09,902 INFO L279 CegarLoopForPetriNet]: 54 programPoint places, 50 predicate places. [2024-11-23 18:25:09,902 INFO L471 AbstractCegarLoop]: Abstraction has has 104 places, 133 transitions, 1142 flow [2024-11-23 18:25:09,902 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:25:09,903 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:25:09,903 INFO L206 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] [2024-11-23 18:25:09,903 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-11-23 18:25:09,903 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2024-11-23 18:25:09,903 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:25:09,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1050001391, now seen corresponding path program 4 times [2024-11-23 18:25:09,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:25:09,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637638615] [2024-11-23 18:25:09,904 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-23 18:25:09,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:25:09,923 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-23 18:25:09,924 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 18:25:09,967 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-23 18:25:09,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:25:09,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637638615] [2024-11-23 18:25:09,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637638615] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:25:09,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:25:09,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-23 18:25:09,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025099293] [2024-11-23 18:25:09,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:25:09,968 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-23 18:25:09,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:25:09,969 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-23 18:25:09,969 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-23 18:25:09,971 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 54 [2024-11-23 18:25:09,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 133 transitions, 1142 flow. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:25:09,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:25:09,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 54 [2024-11-23 18:25:09,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:25:10,343 INFO L124 PetriNetUnfolderBase]: 632/1085 cut-off events. [2024-11-23 18:25:10,344 INFO L125 PetriNetUnfolderBase]: For 3201/3201 co-relation queries the response was YES. [2024-11-23 18:25:10,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4953 conditions, 1085 events. 632/1085 cut-off events. For 3201/3201 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 4960 event pairs, 76 based on Foata normal form. 4/1087 useless extension candidates. Maximal degree in co-relation 4896. Up to 624 conditions per place. [2024-11-23 18:25:10,354 INFO L140 encePairwiseOnDemand]: 48/54 looper letters, 136 selfloop transitions, 27 changer transitions 2/166 dead transitions. [2024-11-23 18:25:10,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 166 transitions, 1700 flow [2024-11-23 18:25:10,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-23 18:25:10,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-23 18:25:10,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 86 transitions. [2024-11-23 18:25:10,356 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.31851851851851853 [2024-11-23 18:25:10,356 INFO L175 Difference]: Start difference. First operand has 104 places, 133 transitions, 1142 flow. Second operand 5 states and 86 transitions. [2024-11-23 18:25:10,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 166 transitions, 1700 flow [2024-11-23 18:25:10,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 166 transitions, 1632 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-11-23 18:25:10,379 INFO L231 Difference]: Finished difference. Result has 105 places, 139 transitions, 1205 flow [2024-11-23 18:25:10,380 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1080, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1205, PETRI_PLACES=105, PETRI_TRANSITIONS=139} [2024-11-23 18:25:10,380 INFO L279 CegarLoopForPetriNet]: 54 programPoint places, 51 predicate places. [2024-11-23 18:25:10,380 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 139 transitions, 1205 flow [2024-11-23 18:25:10,381 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:25:10,381 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:25:10,381 INFO L206 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] [2024-11-23 18:25:10,381 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-11-23 18:25:10,381 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2024-11-23 18:25:10,382 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:25:10,382 INFO L85 PathProgramCache]: Analyzing trace with hash 1576151183, now seen corresponding path program 5 times [2024-11-23 18:25:10,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:25:10,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274465450] [2024-11-23 18:25:10,382 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-23 18:25:10,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:25:10,404 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-23 18:25:10,404 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 18:25:10,613 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 18:25:10,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:25:10,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274465450] [2024-11-23 18:25:10,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274465450] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 18:25:10,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942354274] [2024-11-23 18:25:10,613 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-23 18:25:10,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:25:10,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a560fb4-0743-4c44-95a3-b95ef674b09a/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:25:10,616 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a560fb4-0743-4c44-95a3-b95ef674b09a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:25:10,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a560fb4-0743-4c44-95a3-b95ef674b09a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-23 18:25:10,754 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-23 18:25:10,754 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 18:25:10,756 INFO L256 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-23 18:25:10,757 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:25:10,827 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-23 18:25:10,827 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 18:25:10,881 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-23 18:25:10,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942354274] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 18:25:10,881 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 18:25:10,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2024-11-23 18:25:10,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550959804] [2024-11-23 18:25:10,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 18:25:10,886 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-23 18:25:10,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:25:10,887 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-23 18:25:10,887 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-11-23 18:25:10,987 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 54 [2024-11-23 18:25:10,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 139 transitions, 1205 flow. Second operand has 11 states, 11 states have (on average 12.181818181818182) internal successors, (134), 11 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:25:10,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:25:10,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 54 [2024-11-23 18:25:10,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:25:12,907 INFO L124 PetriNetUnfolderBase]: 1275/2191 cut-off events. [2024-11-23 18:25:12,907 INFO L125 PetriNetUnfolderBase]: For 6481/6481 co-relation queries the response was YES. [2024-11-23 18:25:12,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10056 conditions, 2191 events. 1275/2191 cut-off events. For 6481/6481 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 11677 event pairs, 38 based on Foata normal form. 20/2209 useless extension candidates. Maximal degree in co-relation 9998. Up to 395 conditions per place. [2024-11-23 18:25:12,927 INFO L140 encePairwiseOnDemand]: 40/54 looper letters, 277 selfloop transitions, 211 changer transitions 11/500 dead transitions. [2024-11-23 18:25:12,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 500 transitions, 4929 flow [2024-11-23 18:25:12,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-11-23 18:25:12,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2024-11-23 18:25:12,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 589 transitions. [2024-11-23 18:25:12,932 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.2660343270099368 [2024-11-23 18:25:12,932 INFO L175 Difference]: Start difference. First operand has 105 places, 139 transitions, 1205 flow. Second operand 41 states and 589 transitions. [2024-11-23 18:25:12,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 500 transitions, 4929 flow [2024-11-23 18:25:12,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 500 transitions, 4820 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-11-23 18:25:12,991 INFO L231 Difference]: Finished difference. Result has 162 places, 295 transitions, 3260 flow [2024-11-23 18:25:12,993 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1136, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=3260, PETRI_PLACES=162, PETRI_TRANSITIONS=295} [2024-11-23 18:25:12,993 INFO L279 CegarLoopForPetriNet]: 54 programPoint places, 108 predicate places. [2024-11-23 18:25:12,993 INFO L471 AbstractCegarLoop]: Abstraction has has 162 places, 295 transitions, 3260 flow [2024-11-23 18:25:12,994 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.181818181818182) internal successors, (134), 11 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:25:12,994 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:25:12,994 INFO L206 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] [2024-11-23 18:25:13,006 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a560fb4-0743-4c44-95a3-b95ef674b09a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-23 18:25:13,194 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a560fb4-0743-4c44-95a3-b95ef674b09a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:25:13,195 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2024-11-23 18:25:13,195 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:25:13,195 INFO L85 PathProgramCache]: Analyzing trace with hash 1679957920, now seen corresponding path program 5 times [2024-11-23 18:25:13,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:25:13,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161900264] [2024-11-23 18:25:13,196 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-23 18:25:13,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:25:13,226 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-23 18:25:13,226 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 18:25:13,301 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-23 18:25:13,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:25:13,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161900264] [2024-11-23 18:25:13,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161900264] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:25:13,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:25:13,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-23 18:25:13,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578114934] [2024-11-23 18:25:13,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:25:13,302 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-23 18:25:13,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:25:13,303 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-23 18:25:13,303 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-23 18:25:13,314 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 54 [2024-11-23 18:25:13,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 295 transitions, 3260 flow. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:25:13,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:25:13,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 54 [2024-11-23 18:25:13,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:25:13,996 INFO L124 PetriNetUnfolderBase]: 1182/2090 cut-off events. [2024-11-23 18:25:13,996 INFO L125 PetriNetUnfolderBase]: For 10793/10805 co-relation queries the response was YES. [2024-11-23 18:25:14,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11368 conditions, 2090 events. 1182/2090 cut-off events. For 10793/10805 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 11566 event pairs, 114 based on Foata normal form. 14/2103 useless extension candidates. Maximal degree in co-relation 11286. Up to 1198 conditions per place. [2024-11-23 18:25:14,023 INFO L140 encePairwiseOnDemand]: 48/54 looper letters, 263 selfloop transitions, 46 changer transitions 6/345 dead transitions. [2024-11-23 18:25:14,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 345 transitions, 4391 flow [2024-11-23 18:25:14,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-23 18:25:14,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-23 18:25:14,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 88 transitions. [2024-11-23 18:25:14,024 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.32592592592592595 [2024-11-23 18:25:14,025 INFO L175 Difference]: Start difference. First operand has 162 places, 295 transitions, 3260 flow. Second operand 5 states and 88 transitions. [2024-11-23 18:25:14,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 345 transitions, 4391 flow [2024-11-23 18:25:14,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 345 transitions, 4185 flow, removed 40 selfloop flow, removed 3 redundant places. [2024-11-23 18:25:14,145 INFO L231 Difference]: Finished difference. Result has 165 places, 300 transitions, 3286 flow [2024-11-23 18:25:14,146 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=3084, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3286, PETRI_PLACES=165, PETRI_TRANSITIONS=300} [2024-11-23 18:25:14,147 INFO L279 CegarLoopForPetriNet]: 54 programPoint places, 111 predicate places. [2024-11-23 18:25:14,147 INFO L471 AbstractCegarLoop]: Abstraction has has 165 places, 300 transitions, 3286 flow [2024-11-23 18:25:14,148 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:25:14,148 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:25:14,148 INFO L206 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] [2024-11-23 18:25:14,148 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-11-23 18:25:14,148 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2024-11-23 18:25:14,149 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:25:14,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1278195422, now seen corresponding path program 6 times [2024-11-23 18:25:14,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:25:14,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278731589] [2024-11-23 18:25:14,149 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-23 18:25:14,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:25:14,177 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-23 18:25:14,177 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 18:25:14,274 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-23 18:25:14,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:25:14,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278731589] [2024-11-23 18:25:14,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278731589] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 18:25:14,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752728915] [2024-11-23 18:25:14,275 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-23 18:25:14,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:25:14,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a560fb4-0743-4c44-95a3-b95ef674b09a/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:25:14,278 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a560fb4-0743-4c44-95a3-b95ef674b09a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:25:14,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a560fb4-0743-4c44-95a3-b95ef674b09a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-23 18:25:14,412 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-23 18:25:14,412 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 18:25:14,414 INFO L256 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-23 18:25:14,415 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:25:14,466 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-23 18:25:14,466 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 18:25:14,511 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-23 18:25:14,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752728915] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 18:25:14,511 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 18:25:14,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2024-11-23 18:25:14,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451164302] [2024-11-23 18:25:14,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 18:25:14,512 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-23 18:25:14,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:25:14,513 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-23 18:25:14,513 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2024-11-23 18:25:14,536 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 54 [2024-11-23 18:25:14,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 300 transitions, 3286 flow. Second operand has 11 states, 11 states have (on average 10.909090909090908) internal successors, (120), 11 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:25:14,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:25:14,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 54 [2024-11-23 18:25:14,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:25:15,506 INFO L124 PetriNetUnfolderBase]: 1340/2294 cut-off events. [2024-11-23 18:25:15,506 INFO L125 PetriNetUnfolderBase]: For 10668/10668 co-relation queries the response was YES. [2024-11-23 18:25:15,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12476 conditions, 2294 events. 1340/2294 cut-off events. For 10668/10668 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 12386 event pairs, 62 based on Foata normal form. 28/2322 useless extension candidates. Maximal degree in co-relation 12393. Up to 421 conditions per place. [2024-11-23 18:25:15,533 INFO L140 encePairwiseOnDemand]: 46/54 looper letters, 267 selfloop transitions, 146 changer transitions 1/415 dead transitions. [2024-11-23 18:25:15,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 415 transitions, 4971 flow [2024-11-23 18:25:15,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-23 18:25:15,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-23 18:25:15,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 230 transitions. [2024-11-23 18:25:15,535 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.2839506172839506 [2024-11-23 18:25:15,535 INFO L175 Difference]: Start difference. First operand has 165 places, 300 transitions, 3286 flow. Second operand 15 states and 230 transitions. [2024-11-23 18:25:15,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 415 transitions, 4971 flow [2024-11-23 18:25:15,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 415 transitions, 4821 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-11-23 18:25:15,679 INFO L231 Difference]: Finished difference. Result has 173 places, 308 transitions, 3504 flow [2024-11-23 18:25:15,680 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2986, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=3504, PETRI_PLACES=173, PETRI_TRANSITIONS=308} [2024-11-23 18:25:15,680 INFO L279 CegarLoopForPetriNet]: 54 programPoint places, 119 predicate places. [2024-11-23 18:25:15,681 INFO L471 AbstractCegarLoop]: Abstraction has has 173 places, 308 transitions, 3504 flow [2024-11-23 18:25:15,681 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.909090909090908) internal successors, (120), 11 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:25:15,681 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:25:15,681 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:25:15,693 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a560fb4-0743-4c44-95a3-b95ef674b09a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-23 18:25:15,882 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a560fb4-0743-4c44-95a3-b95ef674b09a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-11-23 18:25:15,882 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2024-11-23 18:25:15,883 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:25:15,883 INFO L85 PathProgramCache]: Analyzing trace with hash 2073306059, now seen corresponding path program 6 times [2024-11-23 18:25:15,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:25:15,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486699783] [2024-11-23 18:25:15,884 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-23 18:25:15,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:25:15,920 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-23 18:25:15,920 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 18:25:16,008 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-23 18:25:16,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:25:16,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486699783] [2024-11-23 18:25:16,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486699783] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:25:16,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:25:16,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-23 18:25:16,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946829221] [2024-11-23 18:25:16,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:25:16,009 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-23 18:25:16,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:25:16,010 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-23 18:25:16,010 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-23 18:25:16,018 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 54 [2024-11-23 18:25:16,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 308 transitions, 3504 flow. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:25:16,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:25:16,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 54 [2024-11-23 18:25:16,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:25:16,723 INFO L124 PetriNetUnfolderBase]: 1221/2145 cut-off events. [2024-11-23 18:25:16,724 INFO L125 PetriNetUnfolderBase]: For 12240/12258 co-relation queries the response was YES. [2024-11-23 18:25:16,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12058 conditions, 2145 events. 1221/2145 cut-off events. For 12240/12258 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 11933 event pairs, 250 based on Foata normal form. 4/2119 useless extension candidates. Maximal degree in co-relation 11979. Up to 1252 conditions per place. [2024-11-23 18:25:16,748 INFO L140 encePairwiseOnDemand]: 48/54 looper letters, 200 selfloop transitions, 74 changer transitions 2/328 dead transitions. [2024-11-23 18:25:16,748 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 328 transitions, 4199 flow [2024-11-23 18:25:16,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-23 18:25:16,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-23 18:25:16,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 87 transitions. [2024-11-23 18:25:16,749 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.32222222222222224 [2024-11-23 18:25:16,749 INFO L175 Difference]: Start difference. First operand has 173 places, 308 transitions, 3504 flow. Second operand 5 states and 87 transitions. [2024-11-23 18:25:16,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 328 transitions, 4199 flow [2024-11-23 18:25:16,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 328 transitions, 4076 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-11-23 18:25:16,862 INFO L231 Difference]: Finished difference. Result has 175 places, 307 transitions, 3521 flow [2024-11-23 18:25:16,863 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=3381, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3521, PETRI_PLACES=175, PETRI_TRANSITIONS=307} [2024-11-23 18:25:16,864 INFO L279 CegarLoopForPetriNet]: 54 programPoint places, 121 predicate places. [2024-11-23 18:25:16,864 INFO L471 AbstractCegarLoop]: Abstraction has has 175 places, 307 transitions, 3521 flow [2024-11-23 18:25:16,864 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:25:16,864 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:25:16,864 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:25:16,865 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-11-23 18:25:16,865 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2024-11-23 18:25:16,865 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:25:16,865 INFO L85 PathProgramCache]: Analyzing trace with hash 818291849, now seen corresponding path program 7 times [2024-11-23 18:25:16,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:25:16,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559541168] [2024-11-23 18:25:16,866 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-23 18:25:16,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:25:16,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:25:16,976 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-23 18:25:16,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:25:16,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559541168] [2024-11-23 18:25:16,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559541168] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 18:25:16,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512823149] [2024-11-23 18:25:16,977 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-23 18:25:16,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:25:16,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a560fb4-0743-4c44-95a3-b95ef674b09a/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:25:16,981 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a560fb4-0743-4c44-95a3-b95ef674b09a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:25:16,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a560fb4-0743-4c44-95a3-b95ef674b09a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-23 18:25:17,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:25:17,126 INFO L256 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-23 18:25:17,127 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:25:17,181 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-23 18:25:17,182 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 18:25:17,219 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-23 18:25:17,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512823149] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 18:25:17,219 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 18:25:17,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2024-11-23 18:25:17,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718431439] [2024-11-23 18:25:17,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 18:25:17,220 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-23 18:25:17,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:25:17,220 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-23 18:25:17,220 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2024-11-23 18:25:17,227 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 54 [2024-11-23 18:25:17,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 307 transitions, 3521 flow. Second operand has 11 states, 11 states have (on average 10.909090909090908) internal successors, (120), 11 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:25:17,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:25:17,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 54 [2024-11-23 18:25:17,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:25:18,009 INFO L124 PetriNetUnfolderBase]: 1304/2224 cut-off events. [2024-11-23 18:25:18,009 INFO L125 PetriNetUnfolderBase]: For 11868/11868 co-relation queries the response was YES. [2024-11-23 18:25:18,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12438 conditions, 2224 events. 1304/2224 cut-off events. For 11868/11868 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 11807 event pairs, 188 based on Foata normal form. 18/2242 useless extension candidates. Maximal degree in co-relation 12358. Up to 849 conditions per place. [2024-11-23 18:25:18,032 INFO L140 encePairwiseOnDemand]: 46/54 looper letters, 214 selfloop transitions, 130 changer transitions 1/346 dead transitions. [2024-11-23 18:25:18,033 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 346 transitions, 4514 flow [2024-11-23 18:25:18,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-23 18:25:18,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-23 18:25:18,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-11-23 18:25:18,034 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3101851851851852 [2024-11-23 18:25:18,034 INFO L175 Difference]: Start difference. First operand has 175 places, 307 transitions, 3521 flow. Second operand 8 states and 134 transitions. [2024-11-23 18:25:18,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 346 transitions, 4514 flow [2024-11-23 18:25:18,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 346 transitions, 4360 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-11-23 18:25:18,149 INFO L231 Difference]: Finished difference. Result has 178 places, 310 transitions, 3654 flow [2024-11-23 18:25:18,149 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=3352, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3654, PETRI_PLACES=178, PETRI_TRANSITIONS=310} [2024-11-23 18:25:18,150 INFO L279 CegarLoopForPetriNet]: 54 programPoint places, 124 predicate places. [2024-11-23 18:25:18,150 INFO L471 AbstractCegarLoop]: Abstraction has has 178 places, 310 transitions, 3654 flow [2024-11-23 18:25:18,150 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.909090909090908) internal successors, (120), 11 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:25:18,150 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:25:18,150 INFO L206 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] [2024-11-23 18:25:18,162 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a560fb4-0743-4c44-95a3-b95ef674b09a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-23 18:25:18,351 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a560fb4-0743-4c44-95a3-b95ef674b09a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:25:18,351 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2024-11-23 18:25:18,352 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:25:18,352 INFO L85 PathProgramCache]: Analyzing trace with hash -867461159, now seen corresponding path program 1 times [2024-11-23 18:25:18,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:25:18,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466266448] [2024-11-23 18:25:18,352 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:25:18,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:25:18,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:25:18,615 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-23 18:25:18,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:25:18,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466266448] [2024-11-23 18:25:18,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466266448] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 18:25:18,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134197126] [2024-11-23 18:25:18,616 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:25:18,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:25:18,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a560fb4-0743-4c44-95a3-b95ef674b09a/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:25:18,618 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a560fb4-0743-4c44-95a3-b95ef674b09a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:25:18,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a560fb4-0743-4c44-95a3-b95ef674b09a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-23 18:25:18,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:25:18,746 INFO L256 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-23 18:25:18,749 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:25:18,904 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-23 18:25:18,904 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 18:25:18,936 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 51 treesize of output 19 [2024-11-23 18:25:19,102 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-23 18:25:19,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134197126] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 18:25:19,102 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 18:25:19,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 12 [2024-11-23 18:25:19,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080860980] [2024-11-23 18:25:19,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 18:25:19,104 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-23 18:25:19,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:25:19,105 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-23 18:25:19,105 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2024-11-23 18:25:19,153 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 54 [2024-11-23 18:25:19,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 310 transitions, 3654 flow. Second operand has 13 states, 13 states have (on average 14.307692307692308) internal successors, (186), 13 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:25:19,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:25:19,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 54 [2024-11-23 18:25:19,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:25:20,352 INFO L124 PetriNetUnfolderBase]: 2703/4863 cut-off events. [2024-11-23 18:25:20,353 INFO L125 PetriNetUnfolderBase]: For 29266/29373 co-relation queries the response was YES. [2024-11-23 18:25:20,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27774 conditions, 4863 events. 2703/4863 cut-off events. For 29266/29373 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 31838 event pairs, 291 based on Foata normal form. 32/4866 useless extension candidates. Maximal degree in co-relation 27424. Up to 1528 conditions per place. [2024-11-23 18:25:20,407 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 520 selfloop transitions, 82 changer transitions 53/739 dead transitions. [2024-11-23 18:25:20,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 739 transitions, 9786 flow [2024-11-23 18:25:20,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-23 18:25:20,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-23 18:25:20,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-11-23 18:25:20,410 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.360082304526749 [2024-11-23 18:25:20,410 INFO L175 Difference]: Start difference. First operand has 178 places, 310 transitions, 3654 flow. Second operand 9 states and 175 transitions. [2024-11-23 18:25:20,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 739 transitions, 9786 flow [2024-11-23 18:25:20,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 739 transitions, 8878 flow, removed 71 selfloop flow, removed 14 redundant places. [2024-11-23 18:25:20,782 INFO L231 Difference]: Finished difference. Result has 176 places, 376 transitions, 4196 flow [2024-11-23 18:25:20,783 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=3256, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4196, PETRI_PLACES=176, PETRI_TRANSITIONS=376} [2024-11-23 18:25:20,783 INFO L279 CegarLoopForPetriNet]: 54 programPoint places, 122 predicate places. [2024-11-23 18:25:20,783 INFO L471 AbstractCegarLoop]: Abstraction has has 176 places, 376 transitions, 4196 flow [2024-11-23 18:25:20,783 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 14.307692307692308) internal successors, (186), 13 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:25:20,784 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:25:20,784 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:25:20,796 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a560fb4-0743-4c44-95a3-b95ef674b09a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-23 18:25:20,984 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a560fb4-0743-4c44-95a3-b95ef674b09a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-23 18:25:20,984 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2024-11-23 18:25:20,985 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:25:20,985 INFO L85 PathProgramCache]: Analyzing trace with hash 1884139512, now seen corresponding path program 2 times [2024-11-23 18:25:20,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:25:20,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78656675] [2024-11-23 18:25:20,985 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 18:25:20,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:25:21,012 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 18:25:21,012 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 18:25:21,121 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-23 18:25:21,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:25:21,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78656675] [2024-11-23 18:25:21,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78656675] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 18:25:21,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294587492] [2024-11-23 18:25:21,121 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 18:25:21,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:25:21,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a560fb4-0743-4c44-95a3-b95ef674b09a/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:25:21,124 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a560fb4-0743-4c44-95a3-b95ef674b09a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:25:21,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a560fb4-0743-4c44-95a3-b95ef674b09a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-23 18:25:21,261 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 18:25:21,262 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 18:25:21,263 INFO L256 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-23 18:25:21,265 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:25:21,376 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-23 18:25:21,376 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 18:25:21,456 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-23 18:25:21,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294587492] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 18:25:21,456 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 18:25:21,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-11-23 18:25:21,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939208672] [2024-11-23 18:25:21,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 18:25:21,457 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-23 18:25:21,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:25:21,458 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-23 18:25:21,459 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2024-11-23 18:25:21,468 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 54 [2024-11-23 18:25:21,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 376 transitions, 4196 flow. Second operand has 15 states, 15 states have (on average 11.533333333333333) internal successors, (173), 15 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:25:21,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:25:21,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 54 [2024-11-23 18:25:21,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:25:23,905 INFO L124 PetriNetUnfolderBase]: 5441/9097 cut-off events. [2024-11-23 18:25:23,906 INFO L125 PetriNetUnfolderBase]: For 46011/46011 co-relation queries the response was YES. [2024-11-23 18:25:23,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49751 conditions, 9097 events. 5441/9097 cut-off events. For 46011/46011 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 58500 event pairs, 217 based on Foata normal form. 324/9421 useless extension candidates. Maximal degree in co-relation 48525. Up to 1650 conditions per place. [2024-11-23 18:25:23,979 INFO L140 encePairwiseOnDemand]: 46/54 looper letters, 478 selfloop transitions, 335 changer transitions 0/814 dead transitions. [2024-11-23 18:25:23,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 814 transitions, 10328 flow [2024-11-23 18:25:23,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-23 18:25:23,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-11-23 18:25:23,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 434 transitions. [2024-11-23 18:25:23,982 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.2771392081736909 [2024-11-23 18:25:23,982 INFO L175 Difference]: Start difference. First operand has 176 places, 376 transitions, 4196 flow. Second operand 29 states and 434 transitions. [2024-11-23 18:25:23,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 814 transitions, 10328 flow [2024-11-23 18:25:24,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 814 transitions, 10269 flow, removed 27 selfloop flow, removed 2 redundant places. [2024-11-23 18:25:24,553 INFO L231 Difference]: Finished difference. Result has 219 places, 531 transitions, 6902 flow [2024-11-23 18:25:24,554 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=4181, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=6902, PETRI_PLACES=219, PETRI_TRANSITIONS=531} [2024-11-23 18:25:24,554 INFO L279 CegarLoopForPetriNet]: 54 programPoint places, 165 predicate places. [2024-11-23 18:25:24,554 INFO L471 AbstractCegarLoop]: Abstraction has has 219 places, 531 transitions, 6902 flow [2024-11-23 18:25:24,554 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 11.533333333333333) internal successors, (173), 15 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:25:24,554 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:25:24,555 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:25:24,562 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a560fb4-0743-4c44-95a3-b95ef674b09a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-23 18:25:24,755 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a560fb4-0743-4c44-95a3-b95ef674b09a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:25:24,755 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2024-11-23 18:25:24,756 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:25:24,756 INFO L85 PathProgramCache]: Analyzing trace with hash -2011002157, now seen corresponding path program 3 times [2024-11-23 18:25:24,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:25:24,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361468817] [2024-11-23 18:25:24,756 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-23 18:25:24,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:25:24,788 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-23 18:25:24,788 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 18:25:24,919 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-23 18:25:24,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:25:24,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361468817] [2024-11-23 18:25:24,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361468817] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 18:25:24,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536651651] [2024-11-23 18:25:24,920 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-23 18:25:24,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:25:24,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a560fb4-0743-4c44-95a3-b95ef674b09a/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:25:24,922 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a560fb4-0743-4c44-95a3-b95ef674b09a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:25:24,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a560fb4-0743-4c44-95a3-b95ef674b09a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-23 18:25:25,074 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-23 18:25:25,075 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 18:25:25,077 INFO L256 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-23 18:25:25,078 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:25:25,193 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-23 18:25:25,194 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 18:25:25,270 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-23 18:25:25,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536651651] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 18:25:25,271 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 18:25:25,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-11-23 18:25:25,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405238799] [2024-11-23 18:25:25,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 18:25:25,271 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-23 18:25:25,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:25:25,272 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-23 18:25:25,272 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2024-11-23 18:25:25,283 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 54 [2024-11-23 18:25:25,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 531 transitions, 6902 flow. Second operand has 15 states, 15 states have (on average 11.2) internal successors, (168), 15 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:25:25,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:25:25,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 54 [2024-11-23 18:25:25,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:25:28,432 INFO L124 PetriNetUnfolderBase]: 6561/10865 cut-off events. [2024-11-23 18:25:28,432 INFO L125 PetriNetUnfolderBase]: For 103461/103461 co-relation queries the response was YES. [2024-11-23 18:25:28,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70721 conditions, 10865 events. 6561/10865 cut-off events. For 103461/103461 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 71636 event pairs, 903 based on Foata normal form. 184/11049 useless extension candidates. Maximal degree in co-relation 69251. Up to 4391 conditions per place. [2024-11-23 18:25:28,541 INFO L140 encePairwiseOnDemand]: 46/54 looper letters, 654 selfloop transitions, 156 changer transitions 0/811 dead transitions. [2024-11-23 18:25:28,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 811 transitions, 11865 flow [2024-11-23 18:25:28,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-23 18:25:28,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-11-23 18:25:28,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 312 transitions. [2024-11-23 18:25:28,543 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.28888888888888886 [2024-11-23 18:25:28,543 INFO L175 Difference]: Start difference. First operand has 219 places, 531 transitions, 6902 flow. Second operand 20 states and 312 transitions. [2024-11-23 18:25:28,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 811 transitions, 11865 flow [2024-11-23 18:25:29,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 811 transitions, 11722 flow, removed 55 selfloop flow, removed 2 redundant places. [2024-11-23 18:25:29,908 INFO L231 Difference]: Finished difference. Result has 249 places, 582 transitions, 8220 flow [2024-11-23 18:25:29,909 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=6759, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=8220, PETRI_PLACES=249, PETRI_TRANSITIONS=582} [2024-11-23 18:25:29,910 INFO L279 CegarLoopForPetriNet]: 54 programPoint places, 195 predicate places. [2024-11-23 18:25:29,910 INFO L471 AbstractCegarLoop]: Abstraction has has 249 places, 582 transitions, 8220 flow [2024-11-23 18:25:29,910 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 11.2) internal successors, (168), 15 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:25:29,910 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:25:29,910 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:25:29,922 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a560fb4-0743-4c44-95a3-b95ef674b09a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-23 18:25:30,110 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a560fb4-0743-4c44-95a3-b95ef674b09a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:25:30,111 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2024-11-23 18:25:30,111 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:25:30,111 INFO L85 PathProgramCache]: Analyzing trace with hash 335855488, now seen corresponding path program 4 times [2024-11-23 18:25:30,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:25:30,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6230379] [2024-11-23 18:25:30,112 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-23 18:25:30,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:25:30,130 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-23 18:25:30,130 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 18:25:30,202 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-23 18:25:30,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:25:30,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6230379] [2024-11-23 18:25:30,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6230379] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 18:25:30,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421156243] [2024-11-23 18:25:30,203 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-23 18:25:30,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:25:30,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a560fb4-0743-4c44-95a3-b95ef674b09a/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:25:30,206 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a560fb4-0743-4c44-95a3-b95ef674b09a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:25:30,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a560fb4-0743-4c44-95a3-b95ef674b09a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-23 18:25:30,346 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-23 18:25:30,347 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 18:25:30,348 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-23 18:25:30,350 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:25:30,448 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-23 18:25:30,448 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 18:25:30,506 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-23 18:25:30,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421156243] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 18:25:30,506 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 18:25:30,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 10 [2024-11-23 18:25:30,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202208325] [2024-11-23 18:25:30,507 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 18:25:30,507 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-23 18:25:30,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:25:30,508 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-23 18:25:30,508 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-11-23 18:25:30,512 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 54 [2024-11-23 18:25:30,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 582 transitions, 8220 flow. Second operand has 10 states, 10 states have (on average 11.8) internal successors, (118), 10 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:25:30,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:25:30,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 54 [2024-11-23 18:25:30,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:25:36,217 INFO L124 PetriNetUnfolderBase]: 9468/15391 cut-off events. [2024-11-23 18:25:36,217 INFO L125 PetriNetUnfolderBase]: For 223668/223668 co-relation queries the response was YES. [2024-11-23 18:25:36,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112597 conditions, 15391 events. 9468/15391 cut-off events. For 223668/223668 co-relation queries the response was YES. Maximal size of possible extension queue 548. Compared 102199 event pairs, 364 based on Foata normal form. 174/15565 useless extension candidates. Maximal degree in co-relation 111105. Up to 3366 conditions per place. [2024-11-23 18:25:36,405 INFO L140 encePairwiseOnDemand]: 46/54 looper letters, 482 selfloop transitions, 494 changer transitions 0/977 dead transitions. [2024-11-23 18:25:36,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 977 transitions, 15857 flow [2024-11-23 18:25:36,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-23 18:25:36,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-11-23 18:25:36,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 301 transitions. [2024-11-23 18:25:36,407 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.27870370370370373 [2024-11-23 18:25:36,408 INFO L175 Difference]: Start difference. First operand has 249 places, 582 transitions, 8220 flow. Second operand 20 states and 301 transitions. [2024-11-23 18:25:36,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 977 transitions, 15857 flow [2024-11-23 18:25:40,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 977 transitions, 15293 flow, removed 221 selfloop flow, removed 6 redundant places. [2024-11-23 18:25:40,322 INFO L231 Difference]: Finished difference. Result has 272 places, 749 transitions, 12253 flow [2024-11-23 18:25:40,323 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=7854, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=582, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=339, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=12253, PETRI_PLACES=272, PETRI_TRANSITIONS=749} [2024-11-23 18:25:40,323 INFO L279 CegarLoopForPetriNet]: 54 programPoint places, 218 predicate places. [2024-11-23 18:25:40,324 INFO L471 AbstractCegarLoop]: Abstraction has has 272 places, 749 transitions, 12253 flow [2024-11-23 18:25:40,324 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.8) internal successors, (118), 10 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:25:40,324 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:25:40,324 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:25:40,336 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a560fb4-0743-4c44-95a3-b95ef674b09a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-23 18:25:40,524 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a560fb4-0743-4c44-95a3-b95ef674b09a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:25:40,525 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2024-11-23 18:25:40,525 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:25:40,525 INFO L85 PathProgramCache]: Analyzing trace with hash -702044130, now seen corresponding path program 5 times [2024-11-23 18:25:40,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:25:40,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837838075] [2024-11-23 18:25:40,525 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-23 18:25:40,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:25:40,556 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-23 18:25:40,557 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 18:25:40,875 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 18:25:40,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:25:40,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837838075] [2024-11-23 18:25:40,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837838075] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 18:25:40,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307297672] [2024-11-23 18:25:40,875 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-23 18:25:40,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:25:40,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a560fb4-0743-4c44-95a3-b95ef674b09a/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:25:40,878 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a560fb4-0743-4c44-95a3-b95ef674b09a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:25:40,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a560fb4-0743-4c44-95a3-b95ef674b09a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-23 18:25:41,060 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-23 18:25:41,060 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 18:25:41,062 INFO L256 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-23 18:25:41,064 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:25:41,188 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-23 18:25:41,190 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 18:25:41,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307297672] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:25:41,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-23 18:25:41,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2024-11-23 18:25:41,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866639314] [2024-11-23 18:25:41,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:25:41,191 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-23 18:25:41,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:25:41,192 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-23 18:25:41,192 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-11-23 18:25:41,215 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 54 [2024-11-23 18:25:41,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 749 transitions, 12253 flow. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:25:41,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:25:41,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 54 [2024-11-23 18:25:41,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:25:47,932 INFO L124 PetriNetUnfolderBase]: 9480/15427 cut-off events. [2024-11-23 18:25:47,932 INFO L125 PetriNetUnfolderBase]: For 251404/251404 co-relation queries the response was YES. [2024-11-23 18:25:48,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121777 conditions, 15427 events. 9480/15427 cut-off events. For 251404/251404 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 103124 event pairs, 963 based on Foata normal form. 24/15451 useless extension candidates. Maximal degree in co-relation 120053. Up to 9080 conditions per place. [2024-11-23 18:25:48,136 INFO L140 encePairwiseOnDemand]: 47/54 looper letters, 581 selfloop transitions, 240 changer transitions 1/823 dead transitions. [2024-11-23 18:25:48,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 823 transitions, 14860 flow [2024-11-23 18:25:48,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-23 18:25:48,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-23 18:25:48,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-11-23 18:25:48,137 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.30687830687830686 [2024-11-23 18:25:48,138 INFO L175 Difference]: Start difference. First operand has 272 places, 749 transitions, 12253 flow. Second operand 7 states and 116 transitions. [2024-11-23 18:25:48,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 823 transitions, 14860 flow [2024-11-23 18:25:53,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 823 transitions, 14045 flow, removed 288 selfloop flow, removed 10 redundant places. [2024-11-23 18:25:53,035 INFO L231 Difference]: Finished difference. Result has 269 places, 751 transitions, 11998 flow [2024-11-23 18:25:53,036 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=11447, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=749, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=238, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=511, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11998, PETRI_PLACES=269, PETRI_TRANSITIONS=751} [2024-11-23 18:25:53,036 INFO L279 CegarLoopForPetriNet]: 54 programPoint places, 215 predicate places. [2024-11-23 18:25:53,036 INFO L471 AbstractCegarLoop]: Abstraction has has 269 places, 751 transitions, 11998 flow [2024-11-23 18:25:53,037 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:25:53,037 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:25:53,037 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:25:53,048 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a560fb4-0743-4c44-95a3-b95ef674b09a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-23 18:25:53,237 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a560fb4-0743-4c44-95a3-b95ef674b09a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:25:53,237 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2024-11-23 18:25:53,238 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:25:53,238 INFO L85 PathProgramCache]: Analyzing trace with hash 1912316998, now seen corresponding path program 6 times [2024-11-23 18:25:53,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:25:53,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795989319] [2024-11-23 18:25:53,238 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-23 18:25:53,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:25:53,291 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-23 18:25:53,295 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 18:25:53,450 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-23 18:25:53,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:25:53,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795989319] [2024-11-23 18:25:53,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795989319] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:25:53,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:25:53,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-23 18:25:53,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763405381] [2024-11-23 18:25:53,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:25:53,452 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-23 18:25:53,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:25:53,452 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-23 18:25:53,453 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-23 18:25:53,468 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 54 [2024-11-23 18:25:53,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 751 transitions, 11998 flow. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:25:53,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:25:53,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 54 [2024-11-23 18:25:53,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:25:59,138 INFO L124 PetriNetUnfolderBase]: 9480/15439 cut-off events. [2024-11-23 18:25:59,138 INFO L125 PetriNetUnfolderBase]: For 225188/225188 co-relation queries the response was YES. [2024-11-23 18:25:59,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118363 conditions, 15439 events. 9480/15439 cut-off events. For 225188/225188 co-relation queries the response was YES. Maximal size of possible extension queue 553. Compared 103048 event pairs, 2991 based on Foata normal form. 12/15451 useless extension candidates. Maximal degree in co-relation 117250. Up to 13675 conditions per place. [2024-11-23 18:25:59,548 INFO L140 encePairwiseOnDemand]: 47/54 looper letters, 731 selfloop transitions, 54 changer transitions 11/797 dead transitions. [2024-11-23 18:25:59,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 797 transitions, 14088 flow [2024-11-23 18:25:59,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-23 18:25:59,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-23 18:25:59,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-11-23 18:25:59,549 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.29894179894179895 [2024-11-23 18:25:59,549 INFO L175 Difference]: Start difference. First operand has 269 places, 751 transitions, 11998 flow. Second operand 7 states and 113 transitions. [2024-11-23 18:25:59,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 797 transitions, 14088 flow [2024-11-23 18:26:03,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 797 transitions, 13768 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-11-23 18:26:03,252 INFO L231 Difference]: Finished difference. Result has 273 places, 748 transitions, 11754 flow [2024-11-23 18:26:03,253 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=11681, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=751, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=697, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11754, PETRI_PLACES=273, PETRI_TRANSITIONS=748} [2024-11-23 18:26:03,253 INFO L279 CegarLoopForPetriNet]: 54 programPoint places, 219 predicate places. [2024-11-23 18:26:03,253 INFO L471 AbstractCegarLoop]: Abstraction has has 273 places, 748 transitions, 11754 flow [2024-11-23 18:26:03,253 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:26:03,253 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:26:03,254 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:26:03,254 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-11-23 18:26:03,254 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2024-11-23 18:26:03,254 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:26:03,254 INFO L85 PathProgramCache]: Analyzing trace with hash 361563556, now seen corresponding path program 7 times [2024-11-23 18:26:03,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:26:03,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926508922] [2024-11-23 18:26:03,255 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-23 18:26:03,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:26:03,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:26:03,385 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-23 18:26:03,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:26:03,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926508922] [2024-11-23 18:26:03,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926508922] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 18:26:03,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548093929] [2024-11-23 18:26:03,386 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-23 18:26:03,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:26:03,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a560fb4-0743-4c44-95a3-b95ef674b09a/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:26:03,389 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a560fb4-0743-4c44-95a3-b95ef674b09a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:26:03,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a560fb4-0743-4c44-95a3-b95ef674b09a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-23 18:26:03,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:26:03,558 INFO L256 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-23 18:26:03,559 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:26:03,665 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-23 18:26:03,665 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 18:26:03,721 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-23 18:26:03,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548093929] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 18:26:03,721 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 18:26:03,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2024-11-23 18:26:03,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330857000] [2024-11-23 18:26:03,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 18:26:03,721 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-23 18:26:03,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:26:03,722 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-23 18:26:03,722 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2024-11-23 18:26:03,744 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 54 [2024-11-23 18:26:03,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 748 transitions, 11754 flow. Second operand has 13 states, 13 states have (on average 11.384615384615385) internal successors, (148), 13 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:26:03,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:26:03,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 54 [2024-11-23 18:26:03,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:26:09,212 INFO L124 PetriNetUnfolderBase]: 9468/15443 cut-off events. [2024-11-23 18:26:09,213 INFO L125 PetriNetUnfolderBase]: For 227191/227191 co-relation queries the response was YES. [2024-11-23 18:26:09,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117610 conditions, 15443 events. 9468/15443 cut-off events. For 227191/227191 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 103531 event pairs, 768 based on Foata normal form. 48/15491 useless extension candidates. Maximal degree in co-relation 116830. Up to 3168 conditions per place. [2024-11-23 18:26:09,405 INFO L140 encePairwiseOnDemand]: 47/54 looper letters, 615 selfloop transitions, 325 changer transitions 3/944 dead transitions. [2024-11-23 18:26:09,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 944 transitions, 16040 flow [2024-11-23 18:26:09,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-23 18:26:09,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-23 18:26:09,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 227 transitions. [2024-11-23 18:26:09,407 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3002645502645503 [2024-11-23 18:26:09,407 INFO L175 Difference]: Start difference. First operand has 273 places, 748 transitions, 11754 flow. Second operand 14 states and 227 transitions. [2024-11-23 18:26:09,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 944 transitions, 16040 flow [2024-11-23 18:26:13,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 944 transitions, 15963 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-11-23 18:26:13,284 INFO L231 Difference]: Finished difference. Result has 283 places, 751 transitions, 12475 flow [2024-11-23 18:26:13,285 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=11689, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=748, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=321, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=12475, PETRI_PLACES=283, PETRI_TRANSITIONS=751} [2024-11-23 18:26:13,285 INFO L279 CegarLoopForPetriNet]: 54 programPoint places, 229 predicate places. [2024-11-23 18:26:13,285 INFO L471 AbstractCegarLoop]: Abstraction has has 283 places, 751 transitions, 12475 flow [2024-11-23 18:26:13,286 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 11.384615384615385) internal successors, (148), 13 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:26:13,286 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:26:13,286 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:26:13,297 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a560fb4-0743-4c44-95a3-b95ef674b09a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-23 18:26:13,486 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a560fb4-0743-4c44-95a3-b95ef674b09a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2024-11-23 18:26:13,487 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2024-11-23 18:26:13,488 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:26:13,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1589049750, now seen corresponding path program 8 times [2024-11-23 18:26:13,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:26:13,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985172809] [2024-11-23 18:26:13,488 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 18:26:13,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:26:13,519 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 18:26:13,519 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 18:26:13,658 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-23 18:26:13,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:26:13,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985172809] [2024-11-23 18:26:13,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985172809] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 18:26:13,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747954577] [2024-11-23 18:26:13,660 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 18:26:13,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:26:13,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a560fb4-0743-4c44-95a3-b95ef674b09a/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:26:13,663 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a560fb4-0743-4c44-95a3-b95ef674b09a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:26:13,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a560fb4-0743-4c44-95a3-b95ef674b09a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-23 18:26:13,840 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 18:26:13,840 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 18:26:13,844 INFO L256 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-23 18:26:13,845 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:26:13,953 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-23 18:26:13,953 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 18:26:14,015 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-23 18:26:14,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747954577] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 18:26:14,015 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 18:26:14,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-11-23 18:26:14,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321225258] [2024-11-23 18:26:14,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 18:26:14,016 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-23 18:26:14,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:26:14,017 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-23 18:26:14,017 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2024-11-23 18:26:14,027 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 54 [2024-11-23 18:26:14,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 751 transitions, 12475 flow. Second operand has 15 states, 15 states have (on average 11.266666666666667) internal successors, (169), 15 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:26:14,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:26:14,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 54 [2024-11-23 18:26:14,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:26:21,061 INFO L124 PetriNetUnfolderBase]: 11156/18181 cut-off events. [2024-11-23 18:26:21,061 INFO L125 PetriNetUnfolderBase]: For 327560/327560 co-relation queries the response was YES. [2024-11-23 18:26:21,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145453 conditions, 18181 events. 11156/18181 cut-off events. For 327560/327560 co-relation queries the response was YES. Maximal size of possible extension queue 657. Compared 125115 event pairs, 1306 based on Foata normal form. 324/18505 useless extension candidates. Maximal degree in co-relation 144500. Up to 6897 conditions per place. [2024-11-23 18:26:21,327 INFO L140 encePairwiseOnDemand]: 46/54 looper letters, 697 selfloop transitions, 391 changer transitions 0/1089 dead transitions. [2024-11-23 18:26:21,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 1089 transitions, 19747 flow [2024-11-23 18:26:21,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-23 18:26:21,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-11-23 18:26:21,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 313 transitions. [2024-11-23 18:26:21,329 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.2898148148148148 [2024-11-23 18:26:21,329 INFO L175 Difference]: Start difference. First operand has 283 places, 751 transitions, 12475 flow. Second operand 20 states and 313 transitions. [2024-11-23 18:26:21,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 1089 transitions, 19747 flow [2024-11-23 18:26:26,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 1089 transitions, 19044 flow, removed 39 selfloop flow, removed 10 redundant places. [2024-11-23 18:26:26,805 INFO L231 Difference]: Finished difference. Result has 305 places, 844 transitions, 15325 flow [2024-11-23 18:26:26,805 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=11827, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=751, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=304, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=436, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=15325, PETRI_PLACES=305, PETRI_TRANSITIONS=844} [2024-11-23 18:26:26,806 INFO L279 CegarLoopForPetriNet]: 54 programPoint places, 251 predicate places. [2024-11-23 18:26:26,806 INFO L471 AbstractCegarLoop]: Abstraction has has 305 places, 844 transitions, 15325 flow [2024-11-23 18:26:26,806 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 11.266666666666667) internal successors, (169), 15 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:26:26,807 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:26:26,807 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:26:26,819 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a560fb4-0743-4c44-95a3-b95ef674b09a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-23 18:26:27,011 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a560fb4-0743-4c44-95a3-b95ef674b09a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:26:27,011 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2024-11-23 18:26:27,012 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:26:27,012 INFO L85 PathProgramCache]: Analyzing trace with hash -22165792, now seen corresponding path program 9 times [2024-11-23 18:26:27,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:26:27,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63854454] [2024-11-23 18:26:27,012 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-23 18:26:27,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:26:27,037 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-23 18:26:27,038 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 18:26:27,414 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-23 18:26:27,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:26:27,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63854454] [2024-11-23 18:26:27,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63854454] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 18:26:27,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887114778] [2024-11-23 18:26:27,415 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-23 18:26:27,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:26:27,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a560fb4-0743-4c44-95a3-b95ef674b09a/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:26:27,418 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a560fb4-0743-4c44-95a3-b95ef674b09a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:26:27,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a560fb4-0743-4c44-95a3-b95ef674b09a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-23 18:26:27,603 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-23 18:26:27,603 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 18:26:27,605 INFO L256 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-23 18:26:27,609 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:26:27,749 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-23 18:26:27,749 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 18:26:27,846 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-23 18:26:27,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887114778] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 18:26:27,847 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 18:26:27,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 15 [2024-11-23 18:26:27,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626567479] [2024-11-23 18:26:27,847 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 18:26:27,848 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-23 18:26:27,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:26:27,849 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-23 18:26:27,849 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2024-11-23 18:26:27,925 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 54 [2024-11-23 18:26:27,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 844 transitions, 15325 flow. Second operand has 15 states, 15 states have (on average 12.266666666666667) internal successors, (184), 15 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:26:27,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:26:27,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 54 [2024-11-23 18:26:27,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:26:42,468 INFO L124 PetriNetUnfolderBase]: 19267/31087 cut-off events. [2024-11-23 18:26:42,468 INFO L125 PetriNetUnfolderBase]: For 781736/781736 co-relation queries the response was YES. [2024-11-23 18:26:42,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 272366 conditions, 31087 events. 19267/31087 cut-off events. For 781736/781736 co-relation queries the response was YES. Maximal size of possible extension queue 1071. Compared 228747 event pairs, 856 based on Foata normal form. 171/31258 useless extension candidates. Maximal degree in co-relation 270892. Up to 6085 conditions per place. [2024-11-23 18:26:43,298 INFO L140 encePairwiseOnDemand]: 39/54 looper letters, 988 selfloop transitions, 1022 changer transitions 141/2152 dead transitions. [2024-11-23 18:26:43,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 2152 transitions, 43412 flow [2024-11-23 18:26:43,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2024-11-23 18:26:43,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2024-11-23 18:26:43,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 910 transitions. [2024-11-23 18:26:43,302 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.27180406212664276 [2024-11-23 18:26:43,302 INFO L175 Difference]: Start difference. First operand has 305 places, 844 transitions, 15325 flow. Second operand 62 states and 910 transitions. [2024-11-23 18:26:43,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 2152 transitions, 43412 flow