./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-more-min-le-max.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_d346cb7d-794e-4df9-bd99-b908844bee40/bin/uautomizer-verify-LYvppIcaGC/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d346cb7d-794e-4df9-bd99-b908844bee40/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_d346cb7d-794e-4df9-bd99-b908844bee40/bin/uautomizer-verify-LYvppIcaGC/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d346cb7d-794e-4df9-bd99-b908844bee40/bin/uautomizer-verify-LYvppIcaGC/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-min-le-max.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d346cb7d-794e-4df9-bd99-b908844bee40/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_d346cb7d-794e-4df9-bd99-b908844bee40/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 dbd0a32f8466e9a1ac86b6dfec2b7453fe6f40d8d953742d93d3d05c5ad7b7af --- Real Ultimate output --- This is Ultimate 0.3.0-dev-6497de0 [2024-11-23 23:08:16,268 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-23 23:08:16,372 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d346cb7d-794e-4df9-bd99-b908844bee40/bin/uautomizer-verify-LYvppIcaGC/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-23 23:08:16,378 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-23 23:08:16,378 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-23 23:08:16,403 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-23 23:08:16,404 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-23 23:08:16,404 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-23 23:08:16,404 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-23 23:08:16,405 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-23 23:08:16,405 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-23 23:08:16,405 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-23 23:08:16,405 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-23 23:08:16,405 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-23 23:08:16,406 INFO L153 SettingsManager]: * Use SBE=true [2024-11-23 23:08:16,406 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-23 23:08:16,406 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-23 23:08:16,406 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-23 23:08:16,406 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-23 23:08:16,406 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-23 23:08:16,407 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-23 23:08:16,407 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-23 23:08:16,407 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-23 23:08:16,407 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-23 23:08:16,407 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-23 23:08:16,407 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-23 23:08:16,407 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-23 23:08:16,408 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-23 23:08:16,408 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-23 23:08:16,408 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-23 23:08:16,408 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-23 23:08:16,408 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-23 23:08:16,408 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-23 23:08:16,408 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 23:08:16,409 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-23 23:08:16,409 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-23 23:08:16,409 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-23 23:08:16,409 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-23 23:08:16,409 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 23:08:16,409 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-23 23:08:16,409 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-23 23:08:16,410 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-23 23:08:16,410 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-23 23:08:16,410 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-23 23:08:16,410 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-23 23:08:16,410 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-23 23:08:16,410 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-23 23:08:16,410 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_d346cb7d-794e-4df9-bd99-b908844bee40/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 -> dbd0a32f8466e9a1ac86b6dfec2b7453fe6f40d8d953742d93d3d05c5ad7b7af [2024-11-23 23:08:16,690 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-23 23:08:16,704 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-23 23:08:16,706 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-23 23:08:16,708 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-23 23:08:16,708 INFO L274 PluginConnector]: CDTParser initialized [2024-11-23 23:08:16,711 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d346cb7d-794e-4df9-bd99-b908844bee40/bin/uautomizer-verify-LYvppIcaGC/../../sv-benchmarks/c/weaver/popl20-more-min-le-max.wvr.c [2024-11-23 23:08:19,658 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d346cb7d-794e-4df9-bd99-b908844bee40/bin/uautomizer-verify-LYvppIcaGC/data/c6fc4df17/5b1b3b7e921048d2b3a957c2da27fac1/FLAG985aa34a3 [2024-11-23 23:08:19,973 INFO L384 CDTParser]: Found 1 translation units. [2024-11-23 23:08:19,974 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d346cb7d-794e-4df9-bd99-b908844bee40/sv-benchmarks/c/weaver/popl20-more-min-le-max.wvr.c [2024-11-23 23:08:19,984 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d346cb7d-794e-4df9-bd99-b908844bee40/bin/uautomizer-verify-LYvppIcaGC/data/c6fc4df17/5b1b3b7e921048d2b3a957c2da27fac1/FLAG985aa34a3 [2024-11-23 23:08:20,005 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d346cb7d-794e-4df9-bd99-b908844bee40/bin/uautomizer-verify-LYvppIcaGC/data/c6fc4df17/5b1b3b7e921048d2b3a957c2da27fac1 [2024-11-23 23:08:20,008 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-23 23:08:20,010 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-23 23:08:20,012 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-23 23:08:20,012 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-23 23:08:20,017 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-23 23:08:20,018 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:08:20" (1/1) ... [2024-11-23 23:08:20,021 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1832ac6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:08:20, skipping insertion in model container [2024-11-23 23:08:20,022 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:08:20" (1/1) ... [2024-11-23 23:08:20,046 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-23 23:08:20,238 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-23 23:08:20,241 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-23 23:08:20,252 INFO L200 MainTranslator]: Completed pre-run [2024-11-23 23:08:20,273 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-23 23:08:20,286 INFO L204 MainTranslator]: Completed translation [2024-11-23 23:08:20,286 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:08:20 WrapperNode [2024-11-23 23:08:20,286 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-23 23:08:20,287 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-23 23:08:20,287 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-23 23:08:20,287 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-23 23:08:20,293 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:08:20" (1/1) ... [2024-11-23 23:08:20,300 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:08:20" (1/1) ... [2024-11-23 23:08:20,317 INFO L138 Inliner]: procedures = 23, calls = 29, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 89 [2024-11-23 23:08:20,317 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-23 23:08:20,318 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-23 23:08:20,318 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-23 23:08:20,318 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-23 23:08:20,326 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:08:20" (1/1) ... [2024-11-23 23:08:20,326 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:08:20" (1/1) ... [2024-11-23 23:08:20,329 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:08:20" (1/1) ... [2024-11-23 23:08:20,344 INFO L175 MemorySlicer]: Split 9 memory accesses to 2 slices as follows [2, 7]. 78 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-11-23 23:08:20,344 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:08:20" (1/1) ... [2024-11-23 23:08:20,345 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:08:20" (1/1) ... [2024-11-23 23:08:20,352 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:08:20" (1/1) ... [2024-11-23 23:08:20,353 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:08:20" (1/1) ... [2024-11-23 23:08:20,361 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:08:20" (1/1) ... [2024-11-23 23:08:20,363 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:08:20" (1/1) ... [2024-11-23 23:08:20,364 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:08:20" (1/1) ... [2024-11-23 23:08:20,366 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-23 23:08:20,366 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-23 23:08:20,366 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-23 23:08:20,367 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-23 23:08:20,368 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:08:20" (1/1) ... [2024-11-23 23:08:20,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 23:08:20,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d346cb7d-794e-4df9-bd99-b908844bee40/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:08:20,402 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d346cb7d-794e-4df9-bd99-b908844bee40/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-23 23:08:20,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d346cb7d-794e-4df9-bd99-b908844bee40/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-23 23:08:20,430 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-23 23:08:20,431 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-23 23:08:20,431 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-23 23:08:20,431 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-23 23:08:20,431 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-23 23:08:20,431 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-23 23:08:20,431 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-23 23:08:20,431 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-23 23:08:20,431 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-23 23:08:20,431 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-23 23:08:20,431 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-23 23:08:20,431 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-23 23:08:20,432 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-23 23:08:20,432 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-23 23:08:20,432 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-23 23:08:20,432 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-23 23:08:20,432 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-23 23:08:20,432 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-23 23:08:20,433 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-23 23:08:20,537 INFO L234 CfgBuilder]: Building ICFG [2024-11-23 23:08:20,539 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-23 23:08:20,865 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-23 23:08:20,865 INFO L283 CfgBuilder]: Performing block encoding [2024-11-23 23:08:21,103 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-23 23:08:21,103 INFO L312 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-23 23:08:21,103 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:08:21 BoogieIcfgContainer [2024-11-23 23:08:21,103 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-23 23:08:21,131 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-23 23:08:21,131 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-23 23:08:21,137 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-23 23:08:21,138 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 11:08:20" (1/3) ... [2024-11-23 23:08:21,138 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6416ae26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:08:21, skipping insertion in model container [2024-11-23 23:08:21,138 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:08:20" (2/3) ... [2024-11-23 23:08:21,139 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6416ae26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:08:21, skipping insertion in model container [2024-11-23 23:08:21,139 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:08:21" (3/3) ... [2024-11-23 23:08:21,140 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-more-min-le-max.wvr.c [2024-11-23 23:08:21,155 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-23 23:08:21,156 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-more-min-le-max.wvr.c that has 4 procedures, 48 locations, 1 initial locations, 3 loop locations, and 16 error locations. [2024-11-23 23:08:21,157 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-23 23:08:21,235 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-23 23:08:21,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 57 places, 50 transitions, 121 flow [2024-11-23 23:08:21,335 INFO L124 PetriNetUnfolderBase]: 3/47 cut-off events. [2024-11-23 23:08:21,338 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-23 23:08:21,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 47 events. 3/47 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 99 event pairs, 0 based on Foata normal form. 0/28 useless extension candidates. Maximal degree in co-relation 38. Up to 2 conditions per place. [2024-11-23 23:08:21,342 INFO L82 GeneralOperation]: Start removeDead. Operand has 57 places, 50 transitions, 121 flow [2024-11-23 23:08:21,348 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 53 places, 46 transitions, 110 flow [2024-11-23 23:08:21,356 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-23 23:08:21,374 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;@6d1d9e60, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-23 23:08:21,374 INFO L334 AbstractCegarLoop]: Starting to check reachability of 27 error locations. [2024-11-23 23:08:21,379 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-23 23:08:21,379 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-23 23:08:21,379 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-23 23:08:21,379 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:08:21,380 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-23 23:08:21,381 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-23 23:08:21,388 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:08:21,388 INFO L85 PathProgramCache]: Analyzing trace with hash 442678, now seen corresponding path program 1 times [2024-11-23 23:08:21,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:08:21,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069569313] [2024-11-23 23:08:21,397 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:08:21,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:08:21,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:08:21,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:08:21,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:08:21,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069569313] [2024-11-23 23:08:21,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069569313] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:08:21,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:08:21,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-23 23:08:21,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418499575] [2024-11-23 23:08:21,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:08:21,699 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-23 23:08:21,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:08:21,729 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-23 23:08:21,729 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-23 23:08:21,751 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-11-23 23:08:21,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 46 transitions, 110 flow. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:08:21,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:08:21,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-11-23 23:08:21,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:08:22,120 INFO L124 PetriNetUnfolderBase]: 465/800 cut-off events. [2024-11-23 23:08:22,121 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2024-11-23 23:08:22,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1620 conditions, 800 events. 465/800 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 4112 event pairs, 388 based on Foata normal form. 1/597 useless extension candidates. Maximal degree in co-relation 1508. Up to 712 conditions per place. [2024-11-23 23:08:22,130 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 27 selfloop transitions, 2 changer transitions 0/39 dead transitions. [2024-11-23 23:08:22,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 39 transitions, 154 flow [2024-11-23 23:08:22,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-23 23:08:22,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-23 23:08:22,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 77 transitions. [2024-11-23 23:08:22,143 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5133333333333333 [2024-11-23 23:08:22,145 INFO L175 Difference]: Start difference. First operand has 53 places, 46 transitions, 110 flow. Second operand 3 states and 77 transitions. [2024-11-23 23:08:22,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 39 transitions, 154 flow [2024-11-23 23:08:22,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 39 transitions, 142 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-23 23:08:22,157 INFO L231 Difference]: Finished difference. Result has 42 places, 39 transitions, 88 flow [2024-11-23 23:08:22,160 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=42, PETRI_TRANSITIONS=39} [2024-11-23 23:08:22,163 INFO L279 CegarLoopForPetriNet]: 53 programPoint places, -11 predicate places. [2024-11-23 23:08:22,163 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 39 transitions, 88 flow [2024-11-23 23:08:22,164 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:08:22,164 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:08:22,164 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-23 23:08:22,164 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-23 23:08:22,164 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-23 23:08:22,165 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:08:22,165 INFO L85 PathProgramCache]: Analyzing trace with hash 442679, now seen corresponding path program 1 times [2024-11-23 23:08:22,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:08:22,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549853115] [2024-11-23 23:08:22,165 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:08:22,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:08:22,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:08:22,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:08:22,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:08:22,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549853115] [2024-11-23 23:08:22,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549853115] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:08:22,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:08:22,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-23 23:08:22,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884900674] [2024-11-23 23:08:22,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:08:22,605 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 23:08:22,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:08:22,606 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 23:08:22,606 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-23 23:08:22,636 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-11-23 23:08:22,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 39 transitions, 88 flow. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:08:22,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:08:22,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-11-23 23:08:22,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:08:22,934 INFO L124 PetriNetUnfolderBase]: 465/799 cut-off events. [2024-11-23 23:08:22,934 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-23 23:08:22,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1561 conditions, 799 events. 465/799 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 4070 event pairs, 388 based on Foata normal form. 0/596 useless extension candidates. Maximal degree in co-relation 1548. Up to 712 conditions per place. [2024-11-23 23:08:22,949 INFO L140 encePairwiseOnDemand]: 45/50 looper letters, 25 selfloop transitions, 4 changer transitions 0/38 dead transitions. [2024-11-23 23:08:22,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 38 transitions, 144 flow [2024-11-23 23:08:22,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-23 23:08:22,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-23 23:08:22,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 86 transitions. [2024-11-23 23:08:22,955 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.43 [2024-11-23 23:08:22,955 INFO L175 Difference]: Start difference. First operand has 42 places, 39 transitions, 88 flow. Second operand 4 states and 86 transitions. [2024-11-23 23:08:22,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 38 transitions, 144 flow [2024-11-23 23:08:22,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 38 transitions, 140 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-23 23:08:22,957 INFO L231 Difference]: Finished difference. Result has 42 places, 38 transitions, 90 flow [2024-11-23 23:08:22,958 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=90, PETRI_PLACES=42, PETRI_TRANSITIONS=38} [2024-11-23 23:08:22,959 INFO L279 CegarLoopForPetriNet]: 53 programPoint places, -11 predicate places. [2024-11-23 23:08:22,960 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 38 transitions, 90 flow [2024-11-23 23:08:22,960 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:08:22,960 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:08:22,960 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-23 23:08:22,962 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-23 23:08:22,962 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-23 23:08:22,962 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:08:22,963 INFO L85 PathProgramCache]: Analyzing trace with hash 442682, now seen corresponding path program 1 times [2024-11-23 23:08:22,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:08:22,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562512871] [2024-11-23 23:08:22,963 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:08:22,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:08:22,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:08:23,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:08:23,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:08:23,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562512871] [2024-11-23 23:08:23,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562512871] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:08:23,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:08:23,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-23 23:08:23,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186533158] [2024-11-23 23:08:23,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:08:23,095 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 23:08:23,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:08:23,096 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 23:08:23,096 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-23 23:08:23,129 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-11-23 23:08:23,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 38 transitions, 90 flow. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:08:23,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:08:23,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-11-23 23:08:23,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:08:23,291 INFO L124 PetriNetUnfolderBase]: 328/567 cut-off events. [2024-11-23 23:08:23,291 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-23 23:08:23,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1112 conditions, 567 events. 328/567 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2624 event pairs, 263 based on Foata normal form. 0/466 useless extension candidates. Maximal degree in co-relation 1097. Up to 504 conditions per place. [2024-11-23 23:08:23,297 INFO L140 encePairwiseOnDemand]: 44/50 looper letters, 25 selfloop transitions, 2 changer transitions 0/34 dead transitions. [2024-11-23 23:08:23,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 34 transitions, 136 flow [2024-11-23 23:08:23,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-23 23:08:23,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-23 23:08:23,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 79 transitions. [2024-11-23 23:08:23,301 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.395 [2024-11-23 23:08:23,301 INFO L175 Difference]: Start difference. First operand has 42 places, 38 transitions, 90 flow. Second operand 4 states and 79 transitions. [2024-11-23 23:08:23,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 34 transitions, 136 flow [2024-11-23 23:08:23,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 34 transitions, 128 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-23 23:08:23,304 INFO L231 Difference]: Finished difference. Result has 38 places, 34 transitions, 78 flow [2024-11-23 23:08:23,304 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=78, PETRI_PLACES=38, PETRI_TRANSITIONS=34} [2024-11-23 23:08:23,305 INFO L279 CegarLoopForPetriNet]: 53 programPoint places, -15 predicate places. [2024-11-23 23:08:23,305 INFO L471 AbstractCegarLoop]: Abstraction has has 38 places, 34 transitions, 78 flow [2024-11-23 23:08:23,306 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:08:23,306 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:08:23,306 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-23 23:08:23,306 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-23 23:08:23,306 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-23 23:08:23,307 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:08:23,308 INFO L85 PathProgramCache]: Analyzing trace with hash 442683, now seen corresponding path program 1 times [2024-11-23 23:08:23,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:08:23,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106187096] [2024-11-23 23:08:23,308 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:08:23,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:08:23,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:08:23,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:08:23,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:08:23,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106187096] [2024-11-23 23:08:23,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106187096] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:08:23,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:08:23,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-23 23:08:23,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973136231] [2024-11-23 23:08:23,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:08:23,391 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-23 23:08:23,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:08:23,392 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-23 23:08:23,392 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-23 23:08:23,399 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 50 [2024-11-23 23:08:23,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 34 transitions, 78 flow. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:08:23,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:08:23,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 50 [2024-11-23 23:08:23,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:08:23,540 INFO L124 PetriNetUnfolderBase]: 328/569 cut-off events. [2024-11-23 23:08:23,541 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-23 23:08:23,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1114 conditions, 569 events. 328/569 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2627 event pairs, 263 based on Foata normal form. 1/470 useless extension candidates. Maximal degree in co-relation 1097. Up to 508 conditions per place. [2024-11-23 23:08:23,545 INFO L140 encePairwiseOnDemand]: 47/50 looper letters, 27 selfloop transitions, 2 changer transitions 0/36 dead transitions. [2024-11-23 23:08:23,545 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 36 transitions, 140 flow [2024-11-23 23:08:23,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-23 23:08:23,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-23 23:08:23,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 75 transitions. [2024-11-23 23:08:23,548 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-11-23 23:08:23,548 INFO L175 Difference]: Start difference. First operand has 38 places, 34 transitions, 78 flow. Second operand 3 states and 75 transitions. [2024-11-23 23:08:23,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 36 transitions, 140 flow [2024-11-23 23:08:23,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 36 transitions, 137 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-23 23:08:23,552 INFO L231 Difference]: Finished difference. Result has 39 places, 35 transitions, 87 flow [2024-11-23 23:08:23,552 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=75, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=87, PETRI_PLACES=39, PETRI_TRANSITIONS=35} [2024-11-23 23:08:23,553 INFO L279 CegarLoopForPetriNet]: 53 programPoint places, -14 predicate places. [2024-11-23 23:08:23,553 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 35 transitions, 87 flow [2024-11-23 23:08:23,553 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:08:23,553 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:08:23,553 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-11-23 23:08:23,554 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-23 23:08:23,554 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-23 23:08:23,554 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:08:23,554 INFO L85 PathProgramCache]: Analyzing trace with hash 425428596, now seen corresponding path program 1 times [2024-11-23 23:08:23,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:08:23,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407725893] [2024-11-23 23:08:23,555 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:08:23,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:08:23,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:08:23,699 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:08:23,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:08:23,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407725893] [2024-11-23 23:08:23,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407725893] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:08:23,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448172006] [2024-11-23 23:08:23,700 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:08:23,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:08:23,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d346cb7d-794e-4df9-bd99-b908844bee40/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:08:23,704 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d346cb7d-794e-4df9-bd99-b908844bee40/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:08:23,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d346cb7d-794e-4df9-bd99-b908844bee40/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-23 23:08:23,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:08:23,785 INFO L256 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-23 23:08:23,789 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:08:23,841 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 23:08:23,880 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:08:23,880 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:08:23,949 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:08:23,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448172006] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-23 23:08:23,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-23 23:08:23,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 4 [2024-11-23 23:08:23,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128629539] [2024-11-23 23:08:23,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:08:23,950 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-23 23:08:23,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:08:23,950 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-23 23:08:23,951 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-23 23:08:23,991 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-11-23 23:08:23,992 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 35 transitions, 87 flow. Second operand has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:08:23,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:08:23,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-11-23 23:08:23,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:08:24,179 INFO L124 PetriNetUnfolderBase]: 328/567 cut-off events. [2024-11-23 23:08:24,179 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-23 23:08:24,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1117 conditions, 567 events. 328/567 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2614 event pairs, 263 based on Foata normal form. 0/467 useless extension candidates. Maximal degree in co-relation 1104. Up to 504 conditions per place. [2024-11-23 23:08:24,185 INFO L140 encePairwiseOnDemand]: 45/50 looper letters, 26 selfloop transitions, 3 changer transitions 0/34 dead transitions. [2024-11-23 23:08:24,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 34 transitions, 143 flow [2024-11-23 23:08:24,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-23 23:08:24,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-23 23:08:24,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 96 transitions. [2024-11-23 23:08:24,187 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.384 [2024-11-23 23:08:24,187 INFO L175 Difference]: Start difference. First operand has 39 places, 35 transitions, 87 flow. Second operand 5 states and 96 transitions. [2024-11-23 23:08:24,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 34 transitions, 143 flow [2024-11-23 23:08:24,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 34 transitions, 141 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-23 23:08:24,193 INFO L231 Difference]: Finished difference. Result has 40 places, 33 transitions, 87 flow [2024-11-23 23:08:24,193 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=81, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=87, PETRI_PLACES=40, PETRI_TRANSITIONS=33} [2024-11-23 23:08:24,194 INFO L279 CegarLoopForPetriNet]: 53 programPoint places, -13 predicate places. [2024-11-23 23:08:24,194 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 33 transitions, 87 flow [2024-11-23 23:08:24,194 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:08:24,194 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:08:24,194 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:08:24,206 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d346cb7d-794e-4df9-bd99-b908844bee40/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-23 23:08:24,395 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d346cb7d-794e-4df9-bd99-b908844bee40/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:08:24,395 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-23 23:08:24,396 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:08:24,396 INFO L85 PathProgramCache]: Analyzing trace with hash 264776651, now seen corresponding path program 1 times [2024-11-23 23:08:24,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:08:24,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871725863] [2024-11-23 23:08:24,396 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:08:24,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:08:24,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:08:24,537 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 23:08:24,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:08:24,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871725863] [2024-11-23 23:08:24,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871725863] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:08:24,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:08:24,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-23 23:08:24,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722783922] [2024-11-23 23:08:24,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:08:24,538 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 23:08:24,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:08:24,538 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 23:08:24,538 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-23 23:08:24,560 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-11-23 23:08:24,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 33 transitions, 87 flow. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 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 23:08:24,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:08:24,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-11-23 23:08:24,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:08:24,767 INFO L124 PetriNetUnfolderBase]: 484/808 cut-off events. [2024-11-23 23:08:24,768 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-23 23:08:24,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1592 conditions, 808 events. 484/808 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 3886 event pairs, 191 based on Foata normal form. 0/693 useless extension candidates. Maximal degree in co-relation 1568. Up to 535 conditions per place. [2024-11-23 23:08:24,772 INFO L140 encePairwiseOnDemand]: 45/50 looper letters, 38 selfloop transitions, 4 changer transitions 0/47 dead transitions. [2024-11-23 23:08:24,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 47 transitions, 201 flow [2024-11-23 23:08:24,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-23 23:08:24,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-23 23:08:24,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 94 transitions. [2024-11-23 23:08:24,774 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.47 [2024-11-23 23:08:24,774 INFO L175 Difference]: Start difference. First operand has 40 places, 33 transitions, 87 flow. Second operand 4 states and 94 transitions. [2024-11-23 23:08:24,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 47 transitions, 201 flow [2024-11-23 23:08:24,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 47 transitions, 198 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-23 23:08:24,776 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 105 flow [2024-11-23 23:08:24,776 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=105, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2024-11-23 23:08:24,776 INFO L279 CegarLoopForPetriNet]: 53 programPoint places, -11 predicate places. [2024-11-23 23:08:24,777 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 105 flow [2024-11-23 23:08:24,777 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 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 23:08:24,777 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:08:24,777 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:08:24,777 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-23 23:08:24,777 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-23 23:08:24,778 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:08:24,778 INFO L85 PathProgramCache]: Analyzing trace with hash 1023000291, now seen corresponding path program 1 times [2024-11-23 23:08:24,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:08:24,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827599813] [2024-11-23 23:08:24,778 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:08:24,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:08:24,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:08:24,893 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 23:08:24,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:08:24,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827599813] [2024-11-23 23:08:24,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827599813] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:08:24,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:08:24,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-23 23:08:24,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767614766] [2024-11-23 23:08:24,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:08:24,894 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 23:08:24,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:08:24,895 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 23:08:24,895 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-23 23:08:24,916 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-11-23 23:08:24,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 105 flow. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:08:24,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:08:24,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-11-23 23:08:24,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:08:25,139 INFO L124 PetriNetUnfolderBase]: 714/1171 cut-off events. [2024-11-23 23:08:25,139 INFO L125 PetriNetUnfolderBase]: For 328/328 co-relation queries the response was YES. [2024-11-23 23:08:25,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2640 conditions, 1171 events. 714/1171 cut-off events. For 328/328 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 5781 event pairs, 329 based on Foata normal form. 0/1074 useless extension candidates. Maximal degree in co-relation 2616. Up to 767 conditions per place. [2024-11-23 23:08:25,147 INFO L140 encePairwiseOnDemand]: 45/50 looper letters, 41 selfloop transitions, 4 changer transitions 0/50 dead transitions. [2024-11-23 23:08:25,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 50 transitions, 242 flow [2024-11-23 23:08:25,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-23 23:08:25,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-23 23:08:25,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 93 transitions. [2024-11-23 23:08:25,148 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.465 [2024-11-23 23:08:25,148 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 105 flow. Second operand 4 states and 93 transitions. [2024-11-23 23:08:25,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 50 transitions, 242 flow [2024-11-23 23:08:25,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 50 transitions, 234 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-23 23:08:25,150 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 121 flow [2024-11-23 23:08:25,150 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=121, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2024-11-23 23:08:25,151 INFO L279 CegarLoopForPetriNet]: 53 programPoint places, -9 predicate places. [2024-11-23 23:08:25,151 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 121 flow [2024-11-23 23:08:25,151 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:08:25,151 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:08:25,151 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:08:25,151 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-23 23:08:25,151 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-23 23:08:25,152 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:08:25,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1893197662, now seen corresponding path program 1 times [2024-11-23 23:08:25,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:08:25,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255683593] [2024-11-23 23:08:25,152 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:08:25,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:08:25,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:08:25,275 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:08:25,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:08:25,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255683593] [2024-11-23 23:08:25,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255683593] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:08:25,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108902728] [2024-11-23 23:08:25,276 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:08:25,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:08:25,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d346cb7d-794e-4df9-bd99-b908844bee40/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:08:25,280 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d346cb7d-794e-4df9-bd99-b908844bee40/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:08:25,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d346cb7d-794e-4df9-bd99-b908844bee40/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-23 23:08:25,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:08:25,376 INFO L256 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-23 23:08:25,377 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:08:25,481 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:08:25,481 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:08:25,572 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:08:25,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108902728] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:08:25,572 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:08:25,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-23 23:08:25,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863689022] [2024-11-23 23:08:25,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:08:25,573 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-23 23:08:25,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:08:25,574 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-23 23:08:25,574 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2024-11-23 23:08:25,633 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-11-23 23:08:25,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 121 flow. Second operand has 14 states, 14 states have (on average 16.142857142857142) internal successors, (226), 14 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:08:25,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:08:25,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-11-23 23:08:25,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:08:26,127 INFO L124 PetriNetUnfolderBase]: 1475/2355 cut-off events. [2024-11-23 23:08:26,127 INFO L125 PetriNetUnfolderBase]: For 901/901 co-relation queries the response was YES. [2024-11-23 23:08:26,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5871 conditions, 2355 events. 1475/2355 cut-off events. For 901/901 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 12390 event pairs, 868 based on Foata normal form. 44/2329 useless extension candidates. Maximal degree in co-relation 3536. Up to 1317 conditions per place. [2024-11-23 23:08:26,147 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 79 selfloop transitions, 10 changer transitions 0/93 dead transitions. [2024-11-23 23:08:26,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 93 transitions, 483 flow [2024-11-23 23:08:26,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-23 23:08:26,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-23 23:08:26,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-11-23 23:08:26,151 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.48 [2024-11-23 23:08:26,151 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 121 flow. Second operand 8 states and 192 transitions. [2024-11-23 23:08:26,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 93 transitions, 483 flow [2024-11-23 23:08:26,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 93 transitions, 467 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-23 23:08:26,157 INFO L231 Difference]: Finished difference. Result has 54 places, 44 transitions, 195 flow [2024-11-23 23:08:26,157 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=195, PETRI_PLACES=54, PETRI_TRANSITIONS=44} [2024-11-23 23:08:26,157 INFO L279 CegarLoopForPetriNet]: 53 programPoint places, 1 predicate places. [2024-11-23 23:08:26,158 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 44 transitions, 195 flow [2024-11-23 23:08:26,158 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 16.142857142857142) internal successors, (226), 14 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:08:26,158 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:08:26,158 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:08:26,167 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d346cb7d-794e-4df9-bd99-b908844bee40/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-23 23:08:26,358 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d346cb7d-794e-4df9-bd99-b908844bee40/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:08:26,359 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-23 23:08:26,359 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:08:26,359 INFO L85 PathProgramCache]: Analyzing trace with hash -885739149, now seen corresponding path program 1 times [2024-11-23 23:08:26,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:08:26,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497943568] [2024-11-23 23:08:26,359 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:08:26,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:08:26,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:08:26,532 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:08:26,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:08:26,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497943568] [2024-11-23 23:08:26,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497943568] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:08:26,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978524107] [2024-11-23 23:08:26,534 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:08:26,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:08:26,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d346cb7d-794e-4df9-bd99-b908844bee40/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:08:26,536 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d346cb7d-794e-4df9-bd99-b908844bee40/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:08:26,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d346cb7d-794e-4df9-bd99-b908844bee40/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-23 23:08:26,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:08:26,618 INFO L256 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-23 23:08:26,619 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:08:26,721 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:08:26,721 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:08:26,804 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:08:26,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978524107] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:08:26,804 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:08:26,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-23 23:08:26,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547504547] [2024-11-23 23:08:26,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:08:26,805 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-23 23:08:26,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:08:26,806 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-23 23:08:26,806 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2024-11-23 23:08:26,851 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-11-23 23:08:26,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 44 transitions, 195 flow. Second operand has 14 states, 14 states have (on average 16.285714285714285) internal successors, (228), 14 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:08:26,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:08:26,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-11-23 23:08:26,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:08:27,289 INFO L124 PetriNetUnfolderBase]: 1290/2009 cut-off events. [2024-11-23 23:08:27,289 INFO L125 PetriNetUnfolderBase]: For 1880/1930 co-relation queries the response was YES. [2024-11-23 23:08:27,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5489 conditions, 2009 events. 1290/2009 cut-off events. For 1880/1930 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 10128 event pairs, 801 based on Foata normal form. 32/1983 useless extension candidates. Maximal degree in co-relation 3604. Up to 1319 conditions per place. [2024-11-23 23:08:27,303 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 71 selfloop transitions, 10 changer transitions 0/85 dead transitions. [2024-11-23 23:08:27,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 85 transitions, 507 flow [2024-11-23 23:08:27,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-23 23:08:27,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-23 23:08:27,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-11-23 23:08:27,306 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4675 [2024-11-23 23:08:27,306 INFO L175 Difference]: Start difference. First operand has 54 places, 44 transitions, 195 flow. Second operand 8 states and 187 transitions. [2024-11-23 23:08:27,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 85 transitions, 507 flow [2024-11-23 23:08:27,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 85 transitions, 493 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-11-23 23:08:27,312 INFO L231 Difference]: Finished difference. Result has 63 places, 48 transitions, 240 flow [2024-11-23 23:08:27,312 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=185, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=240, PETRI_PLACES=63, PETRI_TRANSITIONS=48} [2024-11-23 23:08:27,315 INFO L279 CegarLoopForPetriNet]: 53 programPoint places, 10 predicate places. [2024-11-23 23:08:27,317 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 48 transitions, 240 flow [2024-11-23 23:08:27,317 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 16.285714285714285) internal successors, (228), 14 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:08:27,317 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:08:27,317 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:08:27,327 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d346cb7d-794e-4df9-bd99-b908844bee40/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-23 23:08:27,518 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d346cb7d-794e-4df9-bd99-b908844bee40/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:08:27,518 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-23 23:08:27,518 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:08:27,519 INFO L85 PathProgramCache]: Analyzing trace with hash 871787163, now seen corresponding path program 2 times [2024-11-23 23:08:27,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:08:27,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056961427] [2024-11-23 23:08:27,519 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 23:08:27,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:08:27,539 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 23:08:27,539 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:08:27,799 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 23:08:27,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:08:27,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056961427] [2024-11-23 23:08:27,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056961427] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:08:27,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781515694] [2024-11-23 23:08:27,799 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 23:08:27,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:08:27,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d346cb7d-794e-4df9-bd99-b908844bee40/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:08:27,802 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d346cb7d-794e-4df9-bd99-b908844bee40/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:08:27,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d346cb7d-794e-4df9-bd99-b908844bee40/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-23 23:08:27,884 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 23:08:27,885 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:08:27,886 INFO L256 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-23 23:08:27,888 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:08:28,122 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:08:28,122 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:08:28,308 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-11-23 23:08:28,407 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:08:28,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781515694] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:08:28,407 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:08:28,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 19 [2024-11-23 23:08:28,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034112964] [2024-11-23 23:08:28,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:08:28,408 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-23 23:08:28,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:08:28,409 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-23 23:08:28,409 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2024-11-23 23:08:28,926 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-11-23 23:08:28,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 48 transitions, 240 flow. Second operand has 21 states, 21 states have (on average 14.095238095238095) internal successors, (296), 21 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:08:28,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:08:28,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-11-23 23:08:28,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:08:30,370 INFO L124 PetriNetUnfolderBase]: 1515/2302 cut-off events. [2024-11-23 23:08:30,370 INFO L125 PetriNetUnfolderBase]: For 2269/2310 co-relation queries the response was YES. [2024-11-23 23:08:30,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6914 conditions, 2302 events. 1515/2302 cut-off events. For 2269/2310 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 11518 event pairs, 266 based on Foata normal form. 88/2350 useless extension candidates. Maximal degree in co-relation 4770. Up to 455 conditions per place. [2024-11-23 23:08:30,388 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 133 selfloop transitions, 18 changer transitions 0/155 dead transitions. [2024-11-23 23:08:30,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 155 transitions, 940 flow [2024-11-23 23:08:30,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-23 23:08:30,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-23 23:08:30,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 307 transitions. [2024-11-23 23:08:30,394 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.43857142857142856 [2024-11-23 23:08:30,394 INFO L175 Difference]: Start difference. First operand has 63 places, 48 transitions, 240 flow. Second operand 14 states and 307 transitions. [2024-11-23 23:08:30,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 155 transitions, 940 flow [2024-11-23 23:08:30,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 155 transitions, 917 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-11-23 23:08:30,403 INFO L231 Difference]: Finished difference. Result has 72 places, 51 transitions, 284 flow [2024-11-23 23:08:30,403 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=219, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=284, PETRI_PLACES=72, PETRI_TRANSITIONS=51} [2024-11-23 23:08:30,404 INFO L279 CegarLoopForPetriNet]: 53 programPoint places, 19 predicate places. [2024-11-23 23:08:30,404 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 51 transitions, 284 flow [2024-11-23 23:08:30,404 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 14.095238095238095) internal successors, (296), 21 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:08:30,404 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:08:30,404 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:08:30,414 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d346cb7d-794e-4df9-bd99-b908844bee40/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-23 23:08:30,609 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d346cb7d-794e-4df9-bd99-b908844bee40/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:08:30,609 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-23 23:08:30,610 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:08:30,610 INFO L85 PathProgramCache]: Analyzing trace with hash 1974888748, now seen corresponding path program 2 times [2024-11-23 23:08:30,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:08:30,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471937203] [2024-11-23 23:08:30,610 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 23:08:30,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:08:30,628 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 23:08:30,629 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:08:30,876 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 23:08:30,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:08:30,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471937203] [2024-11-23 23:08:30,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471937203] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:08:30,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525714411] [2024-11-23 23:08:30,877 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 23:08:30,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:08:30,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d346cb7d-794e-4df9-bd99-b908844bee40/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:08:30,880 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d346cb7d-794e-4df9-bd99-b908844bee40/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:08:30,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d346cb7d-794e-4df9-bd99-b908844bee40/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-23 23:08:30,959 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 23:08:30,959 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:08:30,960 INFO L256 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-23 23:08:30,961 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:08:31,161 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-23 23:08:31,161 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:08:31,506 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2024-11-23 23:08:31,593 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-23 23:08:31,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525714411] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:08:31,594 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:08:31,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2024-11-23 23:08:31,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616214439] [2024-11-23 23:08:31,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:08:31,597 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-23 23:08:31,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:08:31,598 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-23 23:08:31,598 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2024-11-23 23:08:31,852 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2024-11-23 23:08:31,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 51 transitions, 284 flow. Second operand has 18 states, 18 states have (on average 14.222222222222221) internal successors, (256), 18 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:08:31,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:08:31,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2024-11-23 23:08:31,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:08:32,459 INFO L124 PetriNetUnfolderBase]: 1351/2048 cut-off events. [2024-11-23 23:08:32,459 INFO L125 PetriNetUnfolderBase]: For 3968/4034 co-relation queries the response was YES. [2024-11-23 23:08:32,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6826 conditions, 2048 events. 1351/2048 cut-off events. For 3968/4034 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 10240 event pairs, 244 based on Foata normal form. 50/2061 useless extension candidates. Maximal degree in co-relation 4526. Up to 586 conditions per place. [2024-11-23 23:08:32,474 INFO L140 encePairwiseOnDemand]: 43/50 looper letters, 96 selfloop transitions, 14 changer transitions 0/116 dead transitions. [2024-11-23 23:08:32,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 116 transitions, 902 flow [2024-11-23 23:08:32,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-23 23:08:32,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-23 23:08:32,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-11-23 23:08:32,475 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4075 [2024-11-23 23:08:32,475 INFO L175 Difference]: Start difference. First operand has 72 places, 51 transitions, 284 flow. Second operand 8 states and 163 transitions. [2024-11-23 23:08:32,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 116 transitions, 902 flow [2024-11-23 23:08:32,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 116 transitions, 692 flow, removed 43 selfloop flow, removed 12 redundant places. [2024-11-23 23:08:32,484 INFO L231 Difference]: Finished difference. Result has 66 places, 51 transitions, 250 flow [2024-11-23 23:08:32,484 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=250, PETRI_PLACES=66, PETRI_TRANSITIONS=51} [2024-11-23 23:08:32,486 INFO L279 CegarLoopForPetriNet]: 53 programPoint places, 13 predicate places. [2024-11-23 23:08:32,486 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 51 transitions, 250 flow [2024-11-23 23:08:32,486 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 14.222222222222221) internal successors, (256), 18 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:08:32,486 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:08:32,486 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] [2024-11-23 23:08:32,495 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d346cb7d-794e-4df9-bd99-b908844bee40/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-23 23:08:32,690 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d346cb7d-794e-4df9-bd99-b908844bee40/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-23 23:08:32,690 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-23 23:08:32,690 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:08:32,691 INFO L85 PathProgramCache]: Analyzing trace with hash -819191852, now seen corresponding path program 1 times [2024-11-23 23:08:32,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:08:32,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221671586] [2024-11-23 23:08:32,691 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:08:32,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:08:32,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:08:32,771 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-23 23:08:32,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:08:32,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221671586] [2024-11-23 23:08:32,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221671586] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:08:32,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:08:32,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-23 23:08:32,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69774216] [2024-11-23 23:08:32,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:08:32,772 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 23:08:32,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:08:32,773 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 23:08:32,773 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-23 23:08:32,780 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 50 [2024-11-23 23:08:32,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 51 transitions, 250 flow. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:08:32,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:08:32,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 50 [2024-11-23 23:08:32,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:08:33,009 INFO L124 PetriNetUnfolderBase]: 996/1675 cut-off events. [2024-11-23 23:08:33,009 INFO L125 PetriNetUnfolderBase]: For 2629/2683 co-relation queries the response was YES. [2024-11-23 23:08:33,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5247 conditions, 1675 events. 996/1675 cut-off events. For 2629/2683 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 9097 event pairs, 539 based on Foata normal form. 70/1697 useless extension candidates. Maximal degree in co-relation 3504. Up to 1071 conditions per place. [2024-11-23 23:08:33,019 INFO L140 encePairwiseOnDemand]: 46/50 looper letters, 52 selfloop transitions, 6 changer transitions 0/66 dead transitions. [2024-11-23 23:08:33,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 66 transitions, 451 flow [2024-11-23 23:08:33,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-23 23:08:33,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-23 23:08:33,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 98 transitions. [2024-11-23 23:08:33,020 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49 [2024-11-23 23:08:33,021 INFO L175 Difference]: Start difference. First operand has 66 places, 51 transitions, 250 flow. Second operand 4 states and 98 transitions. [2024-11-23 23:08:33,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 66 transitions, 451 flow [2024-11-23 23:08:33,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 66 transitions, 379 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-11-23 23:08:33,029 INFO L231 Difference]: Finished difference. Result has 63 places, 49 transitions, 212 flow [2024-11-23 23:08:33,029 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=212, PETRI_PLACES=63, PETRI_TRANSITIONS=49} [2024-11-23 23:08:33,030 INFO L279 CegarLoopForPetriNet]: 53 programPoint places, 10 predicate places. [2024-11-23 23:08:33,030 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 49 transitions, 212 flow [2024-11-23 23:08:33,030 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:08:33,032 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:08:33,032 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, 1, 1] [2024-11-23 23:08:33,032 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-23 23:08:33,032 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-23 23:08:33,033 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:08:33,033 INFO L85 PathProgramCache]: Analyzing trace with hash -1443970269, now seen corresponding path program 1 times [2024-11-23 23:08:33,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:08:33,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272117246] [2024-11-23 23:08:33,033 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:08:33,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:08:33,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:08:33,111 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-23 23:08:33,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:08:33,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272117246] [2024-11-23 23:08:33,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272117246] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:08:33,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:08:33,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-23 23:08:33,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511651912] [2024-11-23 23:08:33,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:08:33,113 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 23:08:33,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:08:33,114 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 23:08:33,116 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-23 23:08:33,122 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 50 [2024-11-23 23:08:33,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 49 transitions, 212 flow. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 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 23:08:33,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:08:33,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 50 [2024-11-23 23:08:33,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:08:33,338 INFO L124 PetriNetUnfolderBase]: 914/1588 cut-off events. [2024-11-23 23:08:33,338 INFO L125 PetriNetUnfolderBase]: For 1356/1402 co-relation queries the response was YES. [2024-11-23 23:08:33,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4268 conditions, 1588 events. 914/1588 cut-off events. For 1356/1402 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 9006 event pairs, 487 based on Foata normal form. 82/1623 useless extension candidates. Maximal degree in co-relation 2850. Up to 925 conditions per place. [2024-11-23 23:08:33,350 INFO L140 encePairwiseOnDemand]: 46/50 looper letters, 49 selfloop transitions, 6 changer transitions 0/63 dead transitions. [2024-11-23 23:08:33,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 63 transitions, 380 flow [2024-11-23 23:08:33,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-23 23:08:33,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-23 23:08:33,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 97 transitions. [2024-11-23 23:08:33,352 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.485 [2024-11-23 23:08:33,352 INFO L175 Difference]: Start difference. First operand has 63 places, 49 transitions, 212 flow. Second operand 4 states and 97 transitions. [2024-11-23 23:08:33,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 63 transitions, 380 flow [2024-11-23 23:08:33,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 63 transitions, 360 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-23 23:08:33,358 INFO L231 Difference]: Finished difference. Result has 63 places, 47 transitions, 202 flow [2024-11-23 23:08:33,359 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=202, PETRI_PLACES=63, PETRI_TRANSITIONS=47} [2024-11-23 23:08:33,359 INFO L279 CegarLoopForPetriNet]: 53 programPoint places, 10 predicate places. [2024-11-23 23:08:33,360 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 47 transitions, 202 flow [2024-11-23 23:08:33,360 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 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 23:08:33,360 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:08:33,360 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, 1, 1, 1, 1, 1] [2024-11-23 23:08:33,360 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-23 23:08:33,361 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2024-11-23 23:08:33,361 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:08:33,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1797422691, now seen corresponding path program 1 times [2024-11-23 23:08:33,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:08:33,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848314916] [2024-11-23 23:08:33,361 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:08:33,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:08:33,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:08:33,766 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-23 23:08:33,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:08:33,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848314916] [2024-11-23 23:08:33,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848314916] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:08:33,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:08:33,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-23 23:08:33,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91594918] [2024-11-23 23:08:33,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:08:33,767 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-23 23:08:33,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:08:33,768 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-23 23:08:33,768 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-23 23:08:33,790 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-11-23 23:08:33,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 47 transitions, 202 flow. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:08:33,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:08:33,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-11-23 23:08:33,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:08:34,208 INFO L124 PetriNetUnfolderBase]: 1294/2032 cut-off events. [2024-11-23 23:08:34,209 INFO L125 PetriNetUnfolderBase]: For 2102/2177 co-relation queries the response was YES. [2024-11-23 23:08:34,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5496 conditions, 2032 events. 1294/2032 cut-off events. For 2102/2177 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9654 event pairs, 141 based on Foata normal form. 2/2022 useless extension candidates. Maximal degree in co-relation 3680. Up to 824 conditions per place. [2024-11-23 23:08:34,218 INFO L140 encePairwiseOnDemand]: 43/50 looper letters, 0 selfloop transitions, 0 changer transitions 106/106 dead transitions. [2024-11-23 23:08:34,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 106 transitions, 648 flow [2024-11-23 23:08:34,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-23 23:08:34,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-23 23:08:34,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 207 transitions. [2024-11-23 23:08:34,221 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.414 [2024-11-23 23:08:34,221 INFO L175 Difference]: Start difference. First operand has 63 places, 47 transitions, 202 flow. Second operand 10 states and 207 transitions. [2024-11-23 23:08:34,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 106 transitions, 648 flow [2024-11-23 23:08:34,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 106 transitions, 612 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-23 23:08:34,227 INFO L231 Difference]: Finished difference. Result has 67 places, 0 transitions, 0 flow [2024-11-23 23:08:34,227 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=0, PETRI_PLACES=67, PETRI_TRANSITIONS=0} [2024-11-23 23:08:34,228 INFO L279 CegarLoopForPetriNet]: 53 programPoint places, 14 predicate places. [2024-11-23 23:08:34,229 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 0 transitions, 0 flow [2024-11-23 23:08:34,229 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:08:34,232 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 27 remaining) [2024-11-23 23:08:34,232 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 27 remaining) [2024-11-23 23:08:34,233 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 27 remaining) [2024-11-23 23:08:34,233 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 27 remaining) [2024-11-23 23:08:34,233 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 27 remaining) [2024-11-23 23:08:34,233 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 27 remaining) [2024-11-23 23:08:34,233 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 27 remaining) [2024-11-23 23:08:34,234 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 27 remaining) [2024-11-23 23:08:34,234 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 27 remaining) [2024-11-23 23:08:34,234 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 27 remaining) [2024-11-23 23:08:34,234 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 27 remaining) [2024-11-23 23:08:34,234 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 27 remaining) [2024-11-23 23:08:34,234 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 27 remaining) [2024-11-23 23:08:34,234 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 27 remaining) [2024-11-23 23:08:34,234 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (12 of 27 remaining) [2024-11-23 23:08:34,234 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK (11 of 27 remaining) [2024-11-23 23:08:34,234 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (10 of 27 remaining) [2024-11-23 23:08:34,234 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (9 of 27 remaining) [2024-11-23 23:08:34,235 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 27 remaining) [2024-11-23 23:08:34,235 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 27 remaining) [2024-11-23 23:08:34,235 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 27 remaining) [2024-11-23 23:08:34,236 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 27 remaining) [2024-11-23 23:08:34,236 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 27 remaining) [2024-11-23 23:08:34,236 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 27 remaining) [2024-11-23 23:08:34,236 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 27 remaining) [2024-11-23 23:08:34,236 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 27 remaining) [2024-11-23 23:08:34,236 INFO L782 garLoopResultBuilder]: Registering result SAFE for location thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 27 remaining) [2024-11-23 23:08:34,236 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-23 23:08:34,237 INFO L422 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:08:34,244 INFO L241 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-11-23 23:08:34,244 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2024-11-23 23:08:34,255 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 11:08:34 BasicIcfg [2024-11-23 23:08:34,256 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-23 23:08:34,256 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-23 23:08:34,259 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-23 23:08:34,259 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-23 23:08:34,260 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:08:21" (3/4) ... [2024-11-23 23:08:34,262 INFO L146 WitnessPrinter]: Generating witness for correct program [2024-11-23 23:08:34,266 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2024-11-23 23:08:34,266 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2024-11-23 23:08:34,267 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread3 [2024-11-23 23:08:34,272 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 91 nodes and edges [2024-11-23 23:08:34,273 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 22 nodes and edges [2024-11-23 23:08:34,273 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2024-11-23 23:08:34,273 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2024-11-23 23:08:34,382 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d346cb7d-794e-4df9-bd99-b908844bee40/bin/uautomizer-verify-LYvppIcaGC/witness.graphml [2024-11-23 23:08:34,382 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d346cb7d-794e-4df9-bd99-b908844bee40/bin/uautomizer-verify-LYvppIcaGC/witness.yml [2024-11-23 23:08:34,382 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-23 23:08:34,384 INFO L158 Benchmark]: Toolchain (without parser) took 14373.14ms. Allocated memory was 117.4MB in the beginning and 352.3MB in the end (delta: 234.9MB). Free memory was 92.8MB in the beginning and 206.8MB in the end (delta: -114.0MB). Peak memory consumption was 116.8MB. Max. memory is 16.1GB. [2024-11-23 23:08:34,385 INFO L158 Benchmark]: CDTParser took 0.49ms. Allocated memory is still 167.8MB. Free memory is still 102.8MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-23 23:08:34,386 INFO L158 Benchmark]: CACSL2BoogieTranslator took 274.89ms. Allocated memory is still 117.4MB. Free memory was 92.8MB in the beginning and 80.9MB in the end (delta: 11.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-23 23:08:34,386 INFO L158 Benchmark]: Boogie Procedure Inliner took 30.44ms. Allocated memory is still 117.4MB. Free memory was 80.9MB in the beginning and 79.4MB in the end (delta: 1.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-23 23:08:34,386 INFO L158 Benchmark]: Boogie Preprocessor took 47.93ms. Allocated memory is still 117.4MB. Free memory was 79.4MB in the beginning and 77.5MB in the end (delta: 1.8MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-23 23:08:34,387 INFO L158 Benchmark]: RCFGBuilder took 737.05ms. Allocated memory is still 117.4MB. Free memory was 77.5MB in the beginning and 37.8MB in the end (delta: 39.8MB). Peak memory consumption was 33.6MB. Max. memory is 16.1GB. [2024-11-23 23:08:34,388 INFO L158 Benchmark]: TraceAbstraction took 13125.01ms. Allocated memory was 117.4MB in the beginning and 352.3MB in the end (delta: 234.9MB). Free memory was 91.2MB in the beginning and 214.6MB in the end (delta: -123.4MB). Peak memory consumption was 103.6MB. Max. memory is 16.1GB. [2024-11-23 23:08:34,388 INFO L158 Benchmark]: Witness Printer took 125.83ms. Allocated memory is still 352.3MB. Free memory was 210.7MB in the beginning and 206.8MB in the end (delta: 3.9MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-23 23:08:34,391 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.49ms. Allocated memory is still 167.8MB. Free memory is still 102.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 274.89ms. Allocated memory is still 117.4MB. Free memory was 92.8MB in the beginning and 80.9MB in the end (delta: 11.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 30.44ms. Allocated memory is still 117.4MB. Free memory was 80.9MB in the beginning and 79.4MB in the end (delta: 1.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Preprocessor took 47.93ms. Allocated memory is still 117.4MB. Free memory was 79.4MB in the beginning and 77.5MB in the end (delta: 1.8MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 737.05ms. Allocated memory is still 117.4MB. Free memory was 77.5MB in the beginning and 37.8MB in the end (delta: 39.8MB). Peak memory consumption was 33.6MB. Max. memory is 16.1GB. * TraceAbstraction took 13125.01ms. Allocated memory was 117.4MB in the beginning and 352.3MB in the end (delta: 234.9MB). Free memory was 91.2MB in the beginning and 214.6MB in the end (delta: -123.4MB). Peak memory consumption was 103.6MB. Max. memory is 16.1GB. * Witness Printer took 125.83ms. Allocated memory is still 352.3MB. Free memory was 210.7MB in the beginning and 206.8MB in the end (delta: 3.9MB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 21]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 78]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 73 locations, 27 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 13.0s, OverallIterations: 14, TraceHistogramMax: 2, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 6.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1017 SdHoareTripleChecker+Valid, 3.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 911 mSDsluCounter, 343 SdHoareTripleChecker+Invalid, 3.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 324 mSDsCounter, 28 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 4046 IncrementalHoareTripleChecker+Invalid, 4074 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 28 mSolverCounterUnsat, 19 mSDtfsCounter, 4046 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 195 GetRequests, 93 SyntacticMatches, 2 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 1.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=284occurred in iteration=10, InterpolantAutomatonStates: 83, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 4.1s InterpolantComputationTime, 245 NumberOfCodeBlocks, 245 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 286 ConstructedInterpolants, 0 QuantifiedInterpolants, 2295 SizeOfPredicates, 19 NumberOfNonLiveVariables, 592 ConjunctsInSsa, 64 ConjunctsInUnsatCore, 24 InterpolantComputations, 10 PerfectInterpolantSequences, 56/85 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available, ConComCheckerStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 16 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-11-23 23:08:34,420 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d346cb7d-794e-4df9-bd99-b908844bee40/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE