./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version d790fecc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b83a3f0-6a4c-469f-8152-51649e8f0a29/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b83a3f0-6a4c-469f-8152-51649e8f0a29/bin/uautomizer-verify-aQ6SnzHsRB/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b83a3f0-6a4c-469f-8152-51649e8f0a29/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b83a3f0-6a4c-469f-8152-51649e8f0a29/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b83a3f0-6a4c-469f-8152-51649e8f0a29/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b83a3f0-6a4c-469f-8152-51649e8f0a29/bin/uautomizer-verify-aQ6SnzHsRB --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 8d3b4a56bf20a7e5cb147a14169234a27b247cfdef3db9f4b8a4f4a17cd6fe47 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 04:55:46,052 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 04:55:46,172 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b83a3f0-6a4c-469f-8152-51649e8f0a29/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-28 04:55:46,179 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 04:55:46,180 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 04:55:46,220 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 04:55:46,224 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 04:55:46,225 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 04:55:46,225 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 04:55:46,225 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 04:55:46,225 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 04:55:46,225 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 04:55:46,226 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 04:55:46,226 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 04:55:46,226 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 04:55:46,226 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 04:55:46,227 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-28 04:55:46,227 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 04:55:46,227 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-28 04:55:46,229 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 04:55:46,229 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-28 04:55:46,230 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-28 04:55:46,230 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-28 04:55:46,230 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 04:55:46,230 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-28 04:55:46,230 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-28 04:55:46,230 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-28 04:55:46,231 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 04:55:46,231 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 04:55:46,231 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 04:55:46,231 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 04:55:46,231 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 04:55:46,232 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 04:55:46,232 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:55:46,232 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 04:55:46,232 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 04:55:46,232 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 04:55:46,232 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 04:55:46,233 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:55:46,233 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 04:55:46,233 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 04:55:46,233 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-28 04:55:46,233 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-28 04:55:46,233 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 04:55:46,234 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 04:55:46,234 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 04:55:46,234 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 04:55:46,234 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_2b83a3f0-6a4c-469f-8152-51649e8f0a29/bin/uautomizer-verify-aQ6SnzHsRB 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 -> 8d3b4a56bf20a7e5cb147a14169234a27b247cfdef3db9f4b8a4f4a17cd6fe47 [2024-11-28 04:55:46,592 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 04:55:46,609 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 04:55:46,612 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 04:55:46,616 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 04:55:46,617 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 04:55:46,619 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b83a3f0-6a4c-469f-8152-51649e8f0a29/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c [2024-11-28 04:55:50,273 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b83a3f0-6a4c-469f-8152-51649e8f0a29/bin/uautomizer-verify-aQ6SnzHsRB/data/b4f98df15/be53af5969dd49b88657e38407f2d489/FLAGca7ae00c2 [2024-11-28 04:55:50,525 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 04:55:50,526 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b83a3f0-6a4c-469f-8152-51649e8f0a29/sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c [2024-11-28 04:55:50,534 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b83a3f0-6a4c-469f-8152-51649e8f0a29/bin/uautomizer-verify-aQ6SnzHsRB/data/b4f98df15/be53af5969dd49b88657e38407f2d489/FLAGca7ae00c2 [2024-11-28 04:55:50,550 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b83a3f0-6a4c-469f-8152-51649e8f0a29/bin/uautomizer-verify-aQ6SnzHsRB/data/b4f98df15/be53af5969dd49b88657e38407f2d489 [2024-11-28 04:55:50,553 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 04:55:50,555 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 04:55:50,556 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 04:55:50,557 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 04:55:50,563 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 04:55:50,564 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:55:50" (1/1) ... [2024-11-28 04:55:50,565 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@508b877f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:55:50, skipping insertion in model container [2024-11-28 04:55:50,566 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:55:50" (1/1) ... [2024-11-28 04:55:50,590 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 04:55:50,823 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-28 04:55:50,827 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 04:55:50,839 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 04:55:50,870 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 04:55:50,886 INFO L204 MainTranslator]: Completed translation [2024-11-28 04:55:50,887 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:55:50 WrapperNode [2024-11-28 04:55:50,887 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 04:55:50,888 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 04:55:50,888 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 04:55:50,888 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 04:55:50,895 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:55:50" (1/1) ... [2024-11-28 04:55:50,903 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:55:50" (1/1) ... [2024-11-28 04:55:50,935 INFO L138 Inliner]: procedures = 26, calls = 64, calls flagged for inlining = 23, calls inlined = 29, statements flattened = 331 [2024-11-28 04:55:50,936 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 04:55:50,936 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 04:55:50,936 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 04:55:50,936 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 04:55:50,946 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:55:50" (1/1) ... [2024-11-28 04:55:50,946 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:55:50" (1/1) ... [2024-11-28 04:55:50,950 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:55:50" (1/1) ... [2024-11-28 04:55:50,980 INFO L175 MemorySlicer]: Split 12 memory accesses to 2 slices as follows [2, 10]. 83 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2024-11-28 04:55:50,981 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:55:50" (1/1) ... [2024-11-28 04:55:50,981 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:55:50" (1/1) ... [2024-11-28 04:55:50,991 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:55:50" (1/1) ... [2024-11-28 04:55:50,998 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:55:50" (1/1) ... [2024-11-28 04:55:51,004 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:55:50" (1/1) ... [2024-11-28 04:55:51,006 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:55:50" (1/1) ... [2024-11-28 04:55:51,008 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:55:50" (1/1) ... [2024-11-28 04:55:51,012 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 04:55:51,013 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 04:55:51,013 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 04:55:51,013 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 04:55:51,014 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:55:50" (1/1) ... [2024-11-28 04:55:51,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:55:51,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b83a3f0-6a4c-469f-8152-51649e8f0a29/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:55:51,052 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b83a3f0-6a4c-469f-8152-51649e8f0a29/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 04:55:51,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b83a3f0-6a4c-469f-8152-51649e8f0a29/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 04:55:51,091 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-28 04:55:51,092 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-28 04:55:51,092 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-28 04:55:51,092 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-28 04:55:51,092 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-28 04:55:51,092 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-28 04:55:51,092 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-28 04:55:51,092 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-28 04:55:51,092 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-28 04:55:51,092 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-28 04:55:51,092 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-28 04:55:51,092 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2024-11-28 04:55:51,092 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2024-11-28 04:55:51,093 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-28 04:55:51,093 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-28 04:55:51,093 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-28 04:55:51,093 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-28 04:55:51,093 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-28 04:55:51,093 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 04:55:51,093 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 04:55:51,095 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-28 04:55:51,238 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 04:55:51,240 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 04:55:52,112 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-28 04:55:52,112 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 04:55:52,978 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 04:55:52,978 INFO L312 CfgBuilder]: Removed 7 assume(true) statements. [2024-11-28 04:55:52,979 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:55:52 BoogieIcfgContainer [2024-11-28 04:55:52,979 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 04:55:52,982 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 04:55:52,982 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 04:55:52,989 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 04:55:52,989 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 04:55:50" (1/3) ... [2024-11-28 04:55:52,990 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@184ec3ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 04:55:52, skipping insertion in model container [2024-11-28 04:55:52,990 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:55:50" (2/3) ... [2024-11-28 04:55:52,991 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@184ec3ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 04:55:52, skipping insertion in model container [2024-11-28 04:55:52,991 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:55:52" (3/3) ... [2024-11-28 04:55:52,993 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-more-buffer-series2.wvr.c [2024-11-28 04:55:53,015 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 04:55:53,017 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-more-buffer-series2.wvr.c that has 5 procedures, 69 locations, 1 initial locations, 7 loop locations, and 22 error locations. [2024-11-28 04:55:53,018 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-28 04:55:53,167 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-11-28 04:55:53,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 81 places, 75 transitions, 178 flow [2024-11-28 04:55:53,312 INFO L124 PetriNetUnfolderBase]: 7/71 cut-off events. [2024-11-28 04:55:53,318 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-28 04:55:53,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88 conditions, 71 events. 7/71 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 185 event pairs, 0 based on Foata normal form. 0/42 useless extension candidates. Maximal degree in co-relation 58. Up to 2 conditions per place. [2024-11-28 04:55:53,328 INFO L82 GeneralOperation]: Start removeDead. Operand has 81 places, 75 transitions, 178 flow [2024-11-28 04:55:53,334 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 76 places, 70 transitions, 164 flow [2024-11-28 04:55:53,350 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 04:55:53,367 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;@64700810, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 04:55:53,367 INFO L334 AbstractCegarLoop]: Starting to check reachability of 40 error locations. [2024-11-28 04:55:53,374 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-28 04:55:53,375 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-28 04:55:53,375 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-28 04:55:53,375 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:55:53,376 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-28 04:55:53,376 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-28 04:55:53,383 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:55:53,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1043750, now seen corresponding path program 1 times [2024-11-28 04:55:53,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:55:53,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819506791] [2024-11-28 04:55:53,394 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:55:53,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:55:53,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:55:53,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:55:53,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:55:53,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819506791] [2024-11-28 04:55:53,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819506791] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:55:53,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:55:53,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-28 04:55:53,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005803871] [2024-11-28 04:55:53,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:55:53,792 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 04:55:53,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:55:53,834 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 04:55:53,834 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 04:55:53,869 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 75 [2024-11-28 04:55:53,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 70 transitions, 164 flow. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:55:53,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:55:53,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 75 [2024-11-28 04:55:53,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:55:57,232 INFO L124 PetriNetUnfolderBase]: 9087/13263 cut-off events. [2024-11-28 04:55:57,233 INFO L125 PetriNetUnfolderBase]: For 206/206 co-relation queries the response was YES. [2024-11-28 04:55:57,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26130 conditions, 13263 events. 9087/13263 cut-off events. For 206/206 co-relation queries the response was YES. Maximal size of possible extension queue 1497. Compared 104300 event pairs, 8782 based on Foata normal form. 1/6667 useless extension candidates. Maximal degree in co-relation 24528. Up to 12043 conditions per place. [2024-11-28 04:55:57,485 INFO L140 encePairwiseOnDemand]: 67/75 looper letters, 41 selfloop transitions, 2 changer transitions 0/63 dead transitions. [2024-11-28 04:55:57,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 63 transitions, 236 flow [2024-11-28 04:55:57,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 04:55:57,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-28 04:55:57,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 124 transitions. [2024-11-28 04:55:57,508 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5511111111111111 [2024-11-28 04:55:57,511 INFO L175 Difference]: Start difference. First operand has 76 places, 70 transitions, 164 flow. Second operand 3 states and 124 transitions. [2024-11-28 04:55:57,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 63 transitions, 236 flow [2024-11-28 04:55:57,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 63 transitions, 220 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-11-28 04:55:57,655 INFO L231 Difference]: Finished difference. Result has 63 places, 63 transitions, 138 flow [2024-11-28 04:55:57,660 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=138, PETRI_PLACES=63, PETRI_TRANSITIONS=63} [2024-11-28 04:55:57,666 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, -13 predicate places. [2024-11-28 04:55:57,667 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 63 transitions, 138 flow [2024-11-28 04:55:57,667 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:55:57,667 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:55:57,667 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-28 04:55:57,668 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-28 04:55:57,668 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-28 04:55:57,669 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:55:57,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1043751, now seen corresponding path program 1 times [2024-11-28 04:55:57,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:55:57,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757449] [2024-11-28 04:55:57,671 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:55:57,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:55:57,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:55:58,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:55:58,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:55:58,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757449] [2024-11-28 04:55:58,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757449] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:55:58,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:55:58,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 04:55:58,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343477979] [2024-11-28 04:55:58,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:55:58,271 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 04:55:58,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:55:58,272 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 04:55:58,273 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 04:55:58,300 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 75 [2024-11-28 04:55:58,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 63 transitions, 138 flow. Second operand has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:55:58,302 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:55:58,302 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 75 [2024-11-28 04:55:58,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:56:00,829 INFO L124 PetriNetUnfolderBase]: 9088/13266 cut-off events. [2024-11-28 04:56:00,829 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-28 04:56:00,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25630 conditions, 13266 events. 9088/13266 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 1497. Compared 104144 event pairs, 8782 based on Foata normal form. 0/6666 useless extension candidates. Maximal degree in co-relation 25593. Up to 12056 conditions per place. [2024-11-28 04:56:00,955 INFO L140 encePairwiseOnDemand]: 70/75 looper letters, 45 selfloop transitions, 4 changer transitions 0/66 dead transitions. [2024-11-28 04:56:00,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 66 transitions, 242 flow [2024-11-28 04:56:00,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 04:56:00,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 04:56:00,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 150 transitions. [2024-11-28 04:56:00,959 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-11-28 04:56:00,959 INFO L175 Difference]: Start difference. First operand has 63 places, 63 transitions, 138 flow. Second operand 4 states and 150 transitions. [2024-11-28 04:56:00,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 66 transitions, 242 flow [2024-11-28 04:56:00,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 66 transitions, 238 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-28 04:56:00,964 INFO L231 Difference]: Finished difference. Result has 66 places, 66 transitions, 161 flow [2024-11-28 04:56:00,965 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=161, PETRI_PLACES=66, PETRI_TRANSITIONS=66} [2024-11-28 04:56:00,966 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, -10 predicate places. [2024-11-28 04:56:00,966 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 66 transitions, 161 flow [2024-11-28 04:56:00,967 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:56:00,969 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:56:00,969 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-28 04:56:00,969 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-28 04:56:00,969 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-28 04:56:00,970 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:56:00,970 INFO L85 PathProgramCache]: Analyzing trace with hash 32357576, now seen corresponding path program 1 times [2024-11-28 04:56:00,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:56:00,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510534597] [2024-11-28 04:56:00,970 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:56:00,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:56:01,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:56:01,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:56:01,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:56:01,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510534597] [2024-11-28 04:56:01,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510534597] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:56:01,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:56:01,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 04:56:01,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063219392] [2024-11-28 04:56:01,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:56:01,405 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 04:56:01,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:56:01,406 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 04:56:01,406 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 04:56:01,439 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 75 [2024-11-28 04:56:01,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 66 transitions, 161 flow. Second operand has 5 states, 5 states have (on average 25.8) internal successors, (129), 5 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:56:01,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:56:01,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 75 [2024-11-28 04:56:01,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:56:03,378 INFO L124 PetriNetUnfolderBase]: 9089/13269 cut-off events. [2024-11-28 04:56:03,378 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-28 04:56:03,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25647 conditions, 13269 events. 9089/13269 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 1497. Compared 104251 event pairs, 8782 based on Foata normal form. 0/6668 useless extension candidates. Maximal degree in co-relation 25622. Up to 12055 conditions per place. [2024-11-28 04:56:03,488 INFO L140 encePairwiseOnDemand]: 67/75 looper letters, 45 selfloop transitions, 7 changer transitions 0/69 dead transitions. [2024-11-28 04:56:03,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 69 transitions, 271 flow [2024-11-28 04:56:03,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 04:56:03,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 04:56:03,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 178 transitions. [2024-11-28 04:56:03,491 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4746666666666667 [2024-11-28 04:56:03,491 INFO L175 Difference]: Start difference. First operand has 66 places, 66 transitions, 161 flow. Second operand 5 states and 178 transitions. [2024-11-28 04:56:03,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 69 transitions, 271 flow [2024-11-28 04:56:03,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 69 transitions, 268 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-28 04:56:03,494 INFO L231 Difference]: Finished difference. Result has 71 places, 69 transitions, 195 flow [2024-11-28 04:56:03,494 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=195, PETRI_PLACES=71, PETRI_TRANSITIONS=69} [2024-11-28 04:56:03,495 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, -5 predicate places. [2024-11-28 04:56:03,495 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 69 transitions, 195 flow [2024-11-28 04:56:03,496 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.8) internal successors, (129), 5 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:56:03,496 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:56:03,496 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-28 04:56:03,496 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-28 04:56:03,496 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-28 04:56:03,497 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:56:03,497 INFO L85 PathProgramCache]: Analyzing trace with hash 1003078451, now seen corresponding path program 1 times [2024-11-28 04:56:03,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:56:03,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879042076] [2024-11-28 04:56:03,498 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:56:03,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:56:03,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:56:03,986 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:56:03,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:56:03,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879042076] [2024-11-28 04:56:03,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879042076] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:56:03,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223917987] [2024-11-28 04:56:03,987 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:56:03,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:56:03,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b83a3f0-6a4c-469f-8152-51649e8f0a29/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:56:03,991 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b83a3f0-6a4c-469f-8152-51649e8f0a29/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:56:03,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b83a3f0-6a4c-469f-8152-51649e8f0a29/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-28 04:56:04,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:56:04,112 INFO L256 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-28 04:56:04,117 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:56:04,206 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-28 04:56:04,539 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:56:04,539 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:56:04,725 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:56:04,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223917987] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:56:04,726 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:56:04,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-28 04:56:04,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796447322] [2024-11-28 04:56:04,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:56:04,727 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-28 04:56:04,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:56:04,728 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-28 04:56:04,728 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-11-28 04:56:04,870 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 75 [2024-11-28 04:56:04,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 69 transitions, 195 flow. Second operand has 11 states, 11 states have (on average 26.363636363636363) internal successors, (290), 11 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:56:04,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:56:04,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 75 [2024-11-28 04:56:04,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:56:06,957 INFO L124 PetriNetUnfolderBase]: 9089/13268 cut-off events. [2024-11-28 04:56:06,957 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-28 04:56:06,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25660 conditions, 13268 events. 9089/13268 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 1497. Compared 104319 event pairs, 8782 based on Foata normal form. 0/6670 useless extension candidates. Maximal degree in co-relation 25632. Up to 12055 conditions per place. [2024-11-28 04:56:07,061 INFO L140 encePairwiseOnDemand]: 70/75 looper letters, 44 selfloop transitions, 7 changer transitions 0/68 dead transitions. [2024-11-28 04:56:07,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 68 transitions, 293 flow [2024-11-28 04:56:07,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 04:56:07,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-28 04:56:07,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 199 transitions. [2024-11-28 04:56:07,064 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.44222222222222224 [2024-11-28 04:56:07,064 INFO L175 Difference]: Start difference. First operand has 71 places, 69 transitions, 195 flow. Second operand 6 states and 199 transitions. [2024-11-28 04:56:07,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 68 transitions, 293 flow [2024-11-28 04:56:07,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 68 transitions, 292 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-28 04:56:07,067 INFO L231 Difference]: Finished difference. Result has 74 places, 68 transitions, 204 flow [2024-11-28 04:56:07,067 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=204, PETRI_PLACES=74, PETRI_TRANSITIONS=68} [2024-11-28 04:56:07,068 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, -2 predicate places. [2024-11-28 04:56:07,068 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 68 transitions, 204 flow [2024-11-28 04:56:07,068 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 26.363636363636363) internal successors, (290), 11 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:56:07,069 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:56:07,069 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-11-28 04:56:07,080 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b83a3f0-6a4c-469f-8152-51649e8f0a29/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-28 04:56:07,269 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b83a3f0-6a4c-469f-8152-51649e8f0a29/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:56:07,270 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-28 04:56:07,271 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:56:07,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1003088656, now seen corresponding path program 1 times [2024-11-28 04:56:07,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:56:07,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465550949] [2024-11-28 04:56:07,271 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:56:07,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:56:07,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:56:07,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:56:07,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:56:07,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465550949] [2024-11-28 04:56:07,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465550949] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:56:07,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:56:07,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 04:56:07,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413988548] [2024-11-28 04:56:07,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:56:07,609 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 04:56:07,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:56:07,610 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 04:56:07,610 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 04:56:07,715 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 75 [2024-11-28 04:56:07,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 68 transitions, 204 flow. Second operand has 5 states, 5 states have (on average 26.0) internal successors, (130), 5 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:56:07,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:56:07,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 75 [2024-11-28 04:56:07,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:56:09,014 INFO L124 PetriNetUnfolderBase]: 9090/13271 cut-off events. [2024-11-28 04:56:09,014 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-28 04:56:09,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25673 conditions, 13271 events. 9090/13271 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 1497. Compared 104438 event pairs, 8782 based on Foata normal form. 0/6672 useless extension candidates. Maximal degree in co-relation 25640. Up to 12057 conditions per place. [2024-11-28 04:56:09,240 INFO L140 encePairwiseOnDemand]: 66/75 looper letters, 45 selfloop transitions, 9 changer transitions 0/71 dead transitions. [2024-11-28 04:56:09,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 71 transitions, 318 flow [2024-11-28 04:56:09,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 04:56:09,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 04:56:09,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 177 transitions. [2024-11-28 04:56:09,247 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.472 [2024-11-28 04:56:09,247 INFO L175 Difference]: Start difference. First operand has 74 places, 68 transitions, 204 flow. Second operand 5 states and 177 transitions. [2024-11-28 04:56:09,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 71 transitions, 318 flow [2024-11-28 04:56:09,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 71 transitions, 284 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-11-28 04:56:09,249 INFO L231 Difference]: Finished difference. Result has 72 places, 71 transitions, 213 flow [2024-11-28 04:56:09,250 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=213, PETRI_PLACES=72, PETRI_TRANSITIONS=71} [2024-11-28 04:56:09,250 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, -4 predicate places. [2024-11-28 04:56:09,251 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 71 transitions, 213 flow [2024-11-28 04:56:09,251 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.0) internal successors, (130), 5 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:56:09,251 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:56:09,251 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-11-28 04:56:09,251 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-28 04:56:09,252 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-28 04:56:09,252 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:56:09,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1030892844, now seen corresponding path program 1 times [2024-11-28 04:56:09,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:56:09,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919170457] [2024-11-28 04:56:09,253 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:56:09,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:56:09,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:56:09,555 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:56:09,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:56:09,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919170457] [2024-11-28 04:56:09,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919170457] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:56:09,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197068990] [2024-11-28 04:56:09,556 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:56:09,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:56:09,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b83a3f0-6a4c-469f-8152-51649e8f0a29/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:56:09,559 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b83a3f0-6a4c-469f-8152-51649e8f0a29/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:56:09,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b83a3f0-6a4c-469f-8152-51649e8f0a29/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-28 04:56:09,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:56:09,662 INFO L256 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-28 04:56:09,664 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:56:09,696 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 [2024-11-28 04:56:09,892 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:56:09,892 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:56:10,104 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:56:10,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197068990] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:56:10,104 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:56:10,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-28 04:56:10,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790963332] [2024-11-28 04:56:10,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:56:10,105 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-28 04:56:10,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:56:10,106 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-28 04:56:10,106 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2024-11-28 04:56:10,261 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 75 [2024-11-28 04:56:10,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 71 transitions, 213 flow. Second operand has 13 states, 13 states have (on average 26.307692307692307) internal successors, (342), 13 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:56:10,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:56:10,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 75 [2024-11-28 04:56:10,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:56:11,735 INFO L124 PetriNetUnfolderBase]: 9092/13276 cut-off events. [2024-11-28 04:56:11,735 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-11-28 04:56:11,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25688 conditions, 13276 events. 9092/13276 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 1497. Compared 104202 event pairs, 8782 based on Foata normal form. 0/6680 useless extension candidates. Maximal degree in co-relation 25636. Up to 12051 conditions per place. [2024-11-28 04:56:11,786 INFO L140 encePairwiseOnDemand]: 67/75 looper letters, 41 selfloop transitions, 18 changer transitions 0/76 dead transitions. [2024-11-28 04:56:11,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 76 transitions, 350 flow [2024-11-28 04:56:11,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 04:56:11,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-28 04:56:11,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 283 transitions. [2024-11-28 04:56:11,788 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4192592592592593 [2024-11-28 04:56:11,788 INFO L175 Difference]: Start difference. First operand has 72 places, 71 transitions, 213 flow. Second operand 9 states and 283 transitions. [2024-11-28 04:56:11,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 76 transitions, 350 flow [2024-11-28 04:56:11,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 76 transitions, 342 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-28 04:56:11,790 INFO L231 Difference]: Finished difference. Result has 77 places, 76 transitions, 260 flow [2024-11-28 04:56:11,791 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=260, PETRI_PLACES=77, PETRI_TRANSITIONS=76} [2024-11-28 04:56:11,791 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 1 predicate places. [2024-11-28 04:56:11,791 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 76 transitions, 260 flow [2024-11-28 04:56:11,792 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 26.307692307692307) internal successors, (342), 13 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:56:11,792 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:56:11,792 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-11-28 04:56:11,801 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b83a3f0-6a4c-469f-8152-51649e8f0a29/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-28 04:56:11,992 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b83a3f0-6a4c-469f-8152-51649e8f0a29/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:56:11,993 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-28 04:56:11,993 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:56:11,993 INFO L85 PathProgramCache]: Analyzing trace with hash 1895558447, now seen corresponding path program 1 times [2024-11-28 04:56:11,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:56:11,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874669656] [2024-11-28 04:56:11,993 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:56:11,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:56:12,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:56:12,358 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:56:12,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:56:12,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874669656] [2024-11-28 04:56:12,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874669656] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:56:12,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595550106] [2024-11-28 04:56:12,359 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:56:12,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:56:12,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b83a3f0-6a4c-469f-8152-51649e8f0a29/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:56:12,361 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b83a3f0-6a4c-469f-8152-51649e8f0a29/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:56:12,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b83a3f0-6a4c-469f-8152-51649e8f0a29/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-28 04:56:12,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:56:12,449 INFO L256 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-28 04:56:12,451 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:56:12,469 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-28 04:56:12,662 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:56:12,663 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:56:12,987 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:56:12,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595550106] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:56:12,987 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:56:12,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-28 04:56:12,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674599182] [2024-11-28 04:56:12,988 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:56:12,988 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-28 04:56:12,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:56:12,989 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-28 04:56:12,989 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-11-28 04:56:13,259 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 75 [2024-11-28 04:56:13,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 76 transitions, 260 flow. Second operand has 13 states, 13 states have (on average 26.46153846153846) internal successors, (344), 13 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:56:13,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:56:13,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 75 [2024-11-28 04:56:13,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:56:14,562 INFO L124 PetriNetUnfolderBase]: 9092/13275 cut-off events. [2024-11-28 04:56:14,562 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-11-28 04:56:14,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25699 conditions, 13275 events. 9092/13275 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 1497. Compared 104394 event pairs, 8782 based on Foata normal form. 0/6680 useless extension candidates. Maximal degree in co-relation 25644. Up to 12052 conditions per place. [2024-11-28 04:56:14,628 INFO L140 encePairwiseOnDemand]: 66/75 looper letters, 39 selfloop transitions, 19 changer transitions 0/75 dead transitions. [2024-11-28 04:56:14,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 75 transitions, 372 flow [2024-11-28 04:56:14,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 04:56:14,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-28 04:56:14,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 225 transitions. [2024-11-28 04:56:14,634 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-11-28 04:56:14,634 INFO L175 Difference]: Start difference. First operand has 77 places, 76 transitions, 260 flow. Second operand 7 states and 225 transitions. [2024-11-28 04:56:14,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 75 transitions, 372 flow [2024-11-28 04:56:14,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 75 transitions, 339 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-11-28 04:56:14,637 INFO L231 Difference]: Finished difference. Result has 77 places, 75 transitions, 261 flow [2024-11-28 04:56:14,637 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=223, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=261, PETRI_PLACES=77, PETRI_TRANSITIONS=75} [2024-11-28 04:56:14,638 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 1 predicate places. [2024-11-28 04:56:14,638 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 75 transitions, 261 flow [2024-11-28 04:56:14,638 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 26.46153846153846) internal successors, (344), 13 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:56:14,639 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:56:14,639 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:56:14,649 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b83a3f0-6a4c-469f-8152-51649e8f0a29/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-28 04:56:14,843 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b83a3f0-6a4c-469f-8152-51649e8f0a29/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:56:14,843 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-28 04:56:14,844 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:56:14,844 INFO L85 PathProgramCache]: Analyzing trace with hash 648133166, now seen corresponding path program 1 times [2024-11-28 04:56:14,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:56:14,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628005097] [2024-11-28 04:56:14,844 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:56:14,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:56:14,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:56:14,940 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:56:14,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:56:14,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628005097] [2024-11-28 04:56:14,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628005097] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:56:14,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:56:14,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 04:56:14,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148487856] [2024-11-28 04:56:14,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:56:14,941 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 04:56:14,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:56:14,942 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 04:56:14,942 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 04:56:14,951 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 75 [2024-11-28 04:56:14,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 75 transitions, 261 flow. Second operand has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:56:14,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:56:14,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 75 [2024-11-28 04:56:14,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:56:16,471 INFO L124 PetriNetUnfolderBase]: 10043/14828 cut-off events. [2024-11-28 04:56:16,471 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-28 04:56:16,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28713 conditions, 14828 events. 10043/14828 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 1567. Compared 119524 event pairs, 9699 based on Foata normal form. 362/8107 useless extension candidates. Maximal degree in co-relation 25654. Up to 12064 conditions per place. [2024-11-28 04:56:16,602 INFO L140 encePairwiseOnDemand]: 60/75 looper letters, 90 selfloop transitions, 8 changer transitions 0/115 dead transitions. [2024-11-28 04:56:16,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 115 transitions, 601 flow [2024-11-28 04:56:16,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 04:56:16,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 04:56:16,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 231 transitions. [2024-11-28 04:56:16,604 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.616 [2024-11-28 04:56:16,604 INFO L175 Difference]: Start difference. First operand has 77 places, 75 transitions, 261 flow. Second operand 5 states and 231 transitions. [2024-11-28 04:56:16,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 115 transitions, 601 flow [2024-11-28 04:56:16,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 115 transitions, 537 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-11-28 04:56:16,609 INFO L231 Difference]: Finished difference. Result has 77 places, 80 transitions, 296 flow [2024-11-28 04:56:16,609 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=296, PETRI_PLACES=77, PETRI_TRANSITIONS=80} [2024-11-28 04:56:16,610 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 1 predicate places. [2024-11-28 04:56:16,610 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 80 transitions, 296 flow [2024-11-28 04:56:16,610 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:56:16,610 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:56:16,610 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:56:16,611 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-28 04:56:16,611 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-28 04:56:16,611 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:56:16,611 INFO L85 PathProgramCache]: Analyzing trace with hash -470952134, now seen corresponding path program 1 times [2024-11-28 04:56:16,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:56:16,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94419872] [2024-11-28 04:56:16,612 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:56:16,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:56:16,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:56:16,859 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 04:56:16,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:56:16,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94419872] [2024-11-28 04:56:16,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94419872] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:56:16,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:56:16,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 04:56:16,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214228338] [2024-11-28 04:56:16,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:56:16,860 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 04:56:16,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:56:16,861 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 04:56:16,861 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-28 04:56:16,949 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 75 [2024-11-28 04:56:16,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 80 transitions, 296 flow. Second operand has 6 states, 6 states have (on average 26.666666666666668) internal successors, (160), 6 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:56:16,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:56:16,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 75 [2024-11-28 04:56:16,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:56:20,081 INFO L124 PetriNetUnfolderBase]: 28387/40176 cut-off events. [2024-11-28 04:56:20,081 INFO L125 PetriNetUnfolderBase]: For 1720/2700 co-relation queries the response was YES. [2024-11-28 04:56:20,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89088 conditions, 40176 events. 28387/40176 cut-off events. For 1720/2700 co-relation queries the response was YES. Maximal size of possible extension queue 3668. Compared 327581 event pairs, 12977 based on Foata normal form. 0/21731 useless extension candidates. Maximal degree in co-relation 79065. Up to 16428 conditions per place. [2024-11-28 04:56:20,266 INFO L140 encePairwiseOnDemand]: 68/75 looper letters, 137 selfloop transitions, 12 changer transitions 0/163 dead transitions. [2024-11-28 04:56:20,266 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 163 transitions, 806 flow [2024-11-28 04:56:20,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 04:56:20,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-28 04:56:20,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 283 transitions. [2024-11-28 04:56:20,269 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6288888888888889 [2024-11-28 04:56:20,269 INFO L175 Difference]: Start difference. First operand has 77 places, 80 transitions, 296 flow. Second operand 6 states and 283 transitions. [2024-11-28 04:56:20,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 163 transitions, 806 flow [2024-11-28 04:56:20,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 163 transitions, 801 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-28 04:56:20,284 INFO L231 Difference]: Finished difference. Result has 83 places, 82 transitions, 340 flow [2024-11-28 04:56:20,285 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=291, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=340, PETRI_PLACES=83, PETRI_TRANSITIONS=82} [2024-11-28 04:56:20,285 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 7 predicate places. [2024-11-28 04:56:20,286 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 82 transitions, 340 flow [2024-11-28 04:56:20,286 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 26.666666666666668) internal successors, (160), 6 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:56:20,286 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:56:20,286 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:56:20,286 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-28 04:56:20,287 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-28 04:56:20,287 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:56:20,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1365782164, now seen corresponding path program 1 times [2024-11-28 04:56:20,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:56:20,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897472139] [2024-11-28 04:56:20,287 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:56:20,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:56:20,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:56:20,405 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:56:20,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:56:20,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897472139] [2024-11-28 04:56:20,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897472139] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:56:20,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:56:20,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 04:56:20,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752143237] [2024-11-28 04:56:20,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:56:20,407 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 04:56:20,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:56:20,408 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 04:56:20,408 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 04:56:20,421 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 75 [2024-11-28 04:56:20,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 82 transitions, 340 flow. Second operand has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:56:20,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:56:20,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 75 [2024-11-28 04:56:20,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:56:23,786 INFO L124 PetriNetUnfolderBase]: 23338/34927 cut-off events. [2024-11-28 04:56:23,787 INFO L125 PetriNetUnfolderBase]: For 5370/5370 co-relation queries the response was YES. [2024-11-28 04:56:23,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78435 conditions, 34927 events. 23338/34927 cut-off events. For 5370/5370 co-relation queries the response was YES. Maximal size of possible extension queue 2916. Compared 304644 event pairs, 22136 based on Foata normal form. 686/20972 useless extension candidates. Maximal degree in co-relation 63001. Up to 27977 conditions per place. [2024-11-28 04:56:24,018 INFO L140 encePairwiseOnDemand]: 62/75 looper letters, 88 selfloop transitions, 10 changer transitions 0/116 dead transitions. [2024-11-28 04:56:24,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 116 transitions, 672 flow [2024-11-28 04:56:24,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 04:56:24,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 04:56:24,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 225 transitions. [2024-11-28 04:56:24,020 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-11-28 04:56:24,020 INFO L175 Difference]: Start difference. First operand has 83 places, 82 transitions, 340 flow. Second operand 5 states and 225 transitions. [2024-11-28 04:56:24,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 116 transitions, 672 flow [2024-11-28 04:56:24,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 116 transitions, 669 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-28 04:56:24,026 INFO L231 Difference]: Finished difference. Result has 88 places, 86 transitions, 429 flow [2024-11-28 04:56:24,026 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=338, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=429, PETRI_PLACES=88, PETRI_TRANSITIONS=86} [2024-11-28 04:56:24,027 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 12 predicate places. [2024-11-28 04:56:24,027 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 86 transitions, 429 flow [2024-11-28 04:56:24,027 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:56:24,027 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:56:24,028 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:56:24,028 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-28 04:56:24,028 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-28 04:56:24,028 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:56:24,029 INFO L85 PathProgramCache]: Analyzing trace with hash 1311434886, now seen corresponding path program 1 times [2024-11-28 04:56:24,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:56:24,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860056105] [2024-11-28 04:56:24,029 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:56:24,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:56:24,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:56:24,212 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 04:56:24,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:56:24,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860056105] [2024-11-28 04:56:24,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860056105] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:56:24,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:56:24,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 04:56:24,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255054367] [2024-11-28 04:56:24,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:56:24,213 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 04:56:24,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:56:24,214 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 04:56:24,214 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 04:56:24,242 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 75 [2024-11-28 04:56:24,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 86 transitions, 429 flow. Second operand has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 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) [2024-11-28 04:56:24,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:56:24,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 75 [2024-11-28 04:56:24,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:56:27,020 INFO L124 PetriNetUnfolderBase]: 17727/26781 cut-off events. [2024-11-28 04:56:27,020 INFO L125 PetriNetUnfolderBase]: For 6272/6272 co-relation queries the response was YES. [2024-11-28 04:56:27,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66181 conditions, 26781 events. 17727/26781 cut-off events. For 6272/6272 co-relation queries the response was YES. Maximal size of possible extension queue 2158. Compared 228727 event pairs, 16757 based on Foata normal form. 0/16542 useless extension candidates. Maximal degree in co-relation 51958. Up to 24071 conditions per place. [2024-11-28 04:56:27,379 INFO L140 encePairwiseOnDemand]: 71/75 looper letters, 60 selfloop transitions, 6 changer transitions 0/84 dead transitions. [2024-11-28 04:56:27,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 84 transitions, 553 flow [2024-11-28 04:56:27,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 04:56:27,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 04:56:27,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 143 transitions. [2024-11-28 04:56:27,381 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4766666666666667 [2024-11-28 04:56:27,381 INFO L175 Difference]: Start difference. First operand has 88 places, 86 transitions, 429 flow. Second operand 4 states and 143 transitions. [2024-11-28 04:56:27,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 84 transitions, 553 flow [2024-11-28 04:56:27,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 84 transitions, 548 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-28 04:56:27,394 INFO L231 Difference]: Finished difference. Result has 88 places, 84 transitions, 428 flow [2024-11-28 04:56:27,395 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=416, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=428, PETRI_PLACES=88, PETRI_TRANSITIONS=84} [2024-11-28 04:56:27,396 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 12 predicate places. [2024-11-28 04:56:27,396 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 84 transitions, 428 flow [2024-11-28 04:56:27,396 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 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) [2024-11-28 04:56:27,396 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:56:27,396 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:56:27,396 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-28 04:56:27,396 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-28 04:56:27,397 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:56:27,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1311434887, now seen corresponding path program 1 times [2024-11-28 04:56:27,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:56:27,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063267762] [2024-11-28 04:56:27,398 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:56:27,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:56:27,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:56:27,657 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:56:27,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:56:27,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063267762] [2024-11-28 04:56:27,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063267762] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:56:27,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:56:27,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 04:56:27,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403561424] [2024-11-28 04:56:27,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:56:27,659 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 04:56:27,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:56:27,660 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 04:56:27,660 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-28 04:56:27,753 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 75 [2024-11-28 04:56:27,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 84 transitions, 428 flow. Second operand has 6 states, 6 states have (on average 27.0) internal successors, (162), 6 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:56:27,754 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:56:27,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 75 [2024-11-28 04:56:27,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:56:33,479 INFO L124 PetriNetUnfolderBase]: 36711/51254 cut-off events. [2024-11-28 04:56:33,479 INFO L125 PetriNetUnfolderBase]: For 13190/18038 co-relation queries the response was YES. [2024-11-28 04:56:33,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130848 conditions, 51254 events. 36711/51254 cut-off events. For 13190/18038 co-relation queries the response was YES. Maximal size of possible extension queue 3735. Compared 398887 event pairs, 15291 based on Foata normal form. 0/30864 useless extension candidates. Maximal degree in co-relation 106369. Up to 20324 conditions per place. [2024-11-28 04:56:33,723 INFO L140 encePairwiseOnDemand]: 67/75 looper letters, 160 selfloop transitions, 18 changer transitions 0/193 dead transitions. [2024-11-28 04:56:33,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 193 transitions, 1135 flow [2024-11-28 04:56:33,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 04:56:33,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-28 04:56:33,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 354 transitions. [2024-11-28 04:56:33,725 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.59 [2024-11-28 04:56:33,725 INFO L175 Difference]: Start difference. First operand has 88 places, 84 transitions, 428 flow. Second operand 8 states and 354 transitions. [2024-11-28 04:56:33,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 193 transitions, 1135 flow [2024-11-28 04:56:33,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 193 transitions, 1128 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-28 04:56:33,738 INFO L231 Difference]: Finished difference. Result has 96 places, 88 transitions, 493 flow [2024-11-28 04:56:33,738 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=421, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=493, PETRI_PLACES=96, PETRI_TRANSITIONS=88} [2024-11-28 04:56:33,738 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 20 predicate places. [2024-11-28 04:56:33,739 INFO L471 AbstractCegarLoop]: Abstraction has has 96 places, 88 transitions, 493 flow [2024-11-28 04:56:33,739 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 27.0) internal successors, (162), 6 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:56:33,739 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:56:33,739 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:56:33,739 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-28 04:56:33,739 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-28 04:56:33,739 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:56:33,739 INFO L85 PathProgramCache]: Analyzing trace with hash 728800984, now seen corresponding path program 1 times [2024-11-28 04:56:33,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:56:33,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631047372] [2024-11-28 04:56:33,740 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:56:33,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:56:33,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:56:33,914 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 04:56:33,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:56:33,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631047372] [2024-11-28 04:56:33,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631047372] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:56:33,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:56:33,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 04:56:33,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45058106] [2024-11-28 04:56:33,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:56:33,915 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 04:56:33,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:56:33,916 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 04:56:33,916 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-28 04:56:33,944 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 75 [2024-11-28 04:56:33,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 88 transitions, 493 flow. Second operand has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:56:33,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:56:33,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 75 [2024-11-28 04:56:33,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:56:36,687 INFO L124 PetriNetUnfolderBase]: 17091/25488 cut-off events. [2024-11-28 04:56:36,687 INFO L125 PetriNetUnfolderBase]: For 11533/11533 co-relation queries the response was YES. [2024-11-28 04:56:36,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66967 conditions, 25488 events. 17091/25488 cut-off events. For 11533/11533 co-relation queries the response was YES. Maximal size of possible extension queue 1827. Compared 208298 event pairs, 15535 based on Foata normal form. 0/17789 useless extension candidates. Maximal degree in co-relation 53812. Up to 22975 conditions per place. [2024-11-28 04:56:37,001 INFO L140 encePairwiseOnDemand]: 70/75 looper letters, 58 selfloop transitions, 9 changer transitions 0/86 dead transitions. [2024-11-28 04:56:37,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 86 transitions, 619 flow [2024-11-28 04:56:37,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 04:56:37,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 04:56:37,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 166 transitions. [2024-11-28 04:56:37,002 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.44266666666666665 [2024-11-28 04:56:37,002 INFO L175 Difference]: Start difference. First operand has 96 places, 88 transitions, 493 flow. Second operand 5 states and 166 transitions. [2024-11-28 04:56:37,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 86 transitions, 619 flow [2024-11-28 04:56:37,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 86 transitions, 606 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-28 04:56:37,012 INFO L231 Difference]: Finished difference. Result has 97 places, 86 transitions, 490 flow [2024-11-28 04:56:37,012 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=472, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=490, PETRI_PLACES=97, PETRI_TRANSITIONS=86} [2024-11-28 04:56:37,013 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 21 predicate places. [2024-11-28 04:56:37,013 INFO L471 AbstractCegarLoop]: Abstraction has has 97 places, 86 transitions, 490 flow [2024-11-28 04:56:37,013 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:56:37,013 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:56:37,013 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:56:37,013 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-28 04:56:37,013 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-28 04:56:37,014 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:56:37,014 INFO L85 PathProgramCache]: Analyzing trace with hash 728800985, now seen corresponding path program 1 times [2024-11-28 04:56:37,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:56:37,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666025742] [2024-11-28 04:56:37,014 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:56:37,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:56:37,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:56:37,592 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:56:37,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:56:37,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666025742] [2024-11-28 04:56:37,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666025742] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:56:37,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775746007] [2024-11-28 04:56:37,593 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:56:37,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:56:37,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b83a3f0-6a4c-469f-8152-51649e8f0a29/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:56:37,596 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b83a3f0-6a4c-469f-8152-51649e8f0a29/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:56:37,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b83a3f0-6a4c-469f-8152-51649e8f0a29/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-28 04:56:37,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:56:37,718 INFO L256 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-28 04:56:37,720 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:56:37,733 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-28 04:56:37,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 04:56:37,832 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-28 04:56:37,868 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-28 04:56:37,868 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2024-11-28 04:56:37,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 04:56:37,922 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-28 04:56:37,937 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-28 04:56:37,938 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-28 04:56:37,989 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 04:56:37,990 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:56:37,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775746007] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:56:37,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 04:56:37,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2024-11-28 04:56:37,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296441877] [2024-11-28 04:56:37,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:56:37,991 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 04:56:37,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:56:37,991 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 04:56:37,991 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-11-28 04:56:38,047 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 75 [2024-11-28 04:56:38,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 86 transitions, 490 flow. Second operand has 6 states, 6 states have (on average 26.666666666666668) internal successors, (160), 6 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:56:38,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:56:38,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 75 [2024-11-28 04:56:38,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:56:40,121 INFO L124 PetriNetUnfolderBase]: 10670/16322 cut-off events. [2024-11-28 04:56:40,121 INFO L125 PetriNetUnfolderBase]: For 8259/8259 co-relation queries the response was YES. [2024-11-28 04:56:40,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42043 conditions, 16322 events. 10670/16322 cut-off events. For 8259/8259 co-relation queries the response was YES. Maximal size of possible extension queue 1121. Compared 130492 event pairs, 9596 based on Foata normal form. 0/12816 useless extension candidates. Maximal degree in co-relation 31013. Up to 14630 conditions per place. [2024-11-28 04:56:40,255 INFO L140 encePairwiseOnDemand]: 71/75 looper letters, 61 selfloop transitions, 4 changer transitions 0/84 dead transitions. [2024-11-28 04:56:40,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 84 transitions, 612 flow [2024-11-28 04:56:40,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 04:56:40,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 04:56:40,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 139 transitions. [2024-11-28 04:56:40,257 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4633333333333333 [2024-11-28 04:56:40,257 INFO L175 Difference]: Start difference. First operand has 97 places, 86 transitions, 490 flow. Second operand 4 states and 139 transitions. [2024-11-28 04:56:40,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 84 transitions, 612 flow [2024-11-28 04:56:40,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 84 transitions, 599 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-28 04:56:40,265 INFO L231 Difference]: Finished difference. Result has 95 places, 84 transitions, 477 flow [2024-11-28 04:56:40,266 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=469, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=477, PETRI_PLACES=95, PETRI_TRANSITIONS=84} [2024-11-28 04:56:40,266 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 19 predicate places. [2024-11-28 04:56:40,266 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 84 transitions, 477 flow [2024-11-28 04:56:40,266 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 26.666666666666668) internal successors, (160), 6 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:56:40,267 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:56:40,267 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:56:40,277 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b83a3f0-6a4c-469f-8152-51649e8f0a29/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-28 04:56:40,467 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b83a3f0-6a4c-469f-8152-51649e8f0a29/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-28 04:56:40,467 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-28 04:56:40,468 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:56:40,468 INFO L85 PathProgramCache]: Analyzing trace with hash 728800987, now seen corresponding path program 1 times [2024-11-28 04:56:40,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:56:40,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046664490] [2024-11-28 04:56:40,468 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:56:40,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:56:40,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:56:40,696 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 04:56:40,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:56:40,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046664490] [2024-11-28 04:56:40,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046664490] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:56:40,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350386330] [2024-11-28 04:56:40,697 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:56:40,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:56:40,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b83a3f0-6a4c-469f-8152-51649e8f0a29/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:56:40,700 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b83a3f0-6a4c-469f-8152-51649e8f0a29/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:56:40,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b83a3f0-6a4c-469f-8152-51649e8f0a29/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-28 04:56:40,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:56:40,824 INFO L256 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-28 04:56:40,825 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:56:40,966 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 04:56:40,967 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:56:41,047 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2024-11-28 04:56:41,103 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 04:56:41,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350386330] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:56:41,104 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:56:41,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2024-11-28 04:56:41,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724598913] [2024-11-28 04:56:41,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:56:41,105 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-28 04:56:41,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:56:41,105 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-28 04:56:41,106 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2024-11-28 04:56:41,363 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 75 [2024-11-28 04:56:41,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 84 transitions, 477 flow. Second operand has 12 states, 12 states have (on average 29.833333333333332) internal successors, (358), 12 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:56:41,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:56:41,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 75 [2024-11-28 04:56:41,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:56:43,116 INFO L124 PetriNetUnfolderBase]: 9324/14788 cut-off events. [2024-11-28 04:56:43,117 INFO L125 PetriNetUnfolderBase]: For 7639/7639 co-relation queries the response was YES. [2024-11-28 04:56:43,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37951 conditions, 14788 events. 9324/14788 cut-off events. For 7639/7639 co-relation queries the response was YES. Maximal size of possible extension queue 1003. Compared 117863 event pairs, 4601 based on Foata normal form. 420/12466 useless extension candidates. Maximal degree in co-relation 30273. Up to 5897 conditions per place. [2024-11-28 04:56:43,245 INFO L140 encePairwiseOnDemand]: 66/75 looper letters, 91 selfloop transitions, 20 changer transitions 0/130 dead transitions. [2024-11-28 04:56:43,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 130 transitions, 842 flow [2024-11-28 04:56:43,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 04:56:43,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-28 04:56:43,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 261 transitions. [2024-11-28 04:56:43,247 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.58 [2024-11-28 04:56:43,248 INFO L175 Difference]: Start difference. First operand has 95 places, 84 transitions, 477 flow. Second operand 6 states and 261 transitions. [2024-11-28 04:56:43,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 130 transitions, 842 flow [2024-11-28 04:56:43,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 130 transitions, 837 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-28 04:56:43,265 INFO L231 Difference]: Finished difference. Result has 99 places, 84 transitions, 516 flow [2024-11-28 04:56:43,265 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=472, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=516, PETRI_PLACES=99, PETRI_TRANSITIONS=84} [2024-11-28 04:56:43,266 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 23 predicate places. [2024-11-28 04:56:43,266 INFO L471 AbstractCegarLoop]: Abstraction has has 99 places, 84 transitions, 516 flow [2024-11-28 04:56:43,266 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 29.833333333333332) internal successors, (358), 12 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:56:43,266 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:56:43,267 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:56:43,276 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b83a3f0-6a4c-469f-8152-51649e8f0a29/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-28 04:56:43,469 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b83a3f0-6a4c-469f-8152-51649e8f0a29/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-28 04:56:43,469 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-28 04:56:43,470 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:56:43,470 INFO L85 PathProgramCache]: Analyzing trace with hash -238337946, now seen corresponding path program 1 times [2024-11-28 04:56:43,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:56:43,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739314645] [2024-11-28 04:56:43,470 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:56:43,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:56:43,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:56:43,787 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:56:43,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:56:43,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739314645] [2024-11-28 04:56:43,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739314645] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:56:43,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150907929] [2024-11-28 04:56:43,788 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:56:43,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:56:43,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b83a3f0-6a4c-469f-8152-51649e8f0a29/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:56:43,791 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b83a3f0-6a4c-469f-8152-51649e8f0a29/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:56:43,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b83a3f0-6a4c-469f-8152-51649e8f0a29/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-28 04:56:43,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:56:43,928 INFO L256 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-28 04:56:43,930 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:56:44,077 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:56:44,077 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:56:44,185 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2024-11-28 04:56:44,246 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:56:44,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150907929] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:56:44,247 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:56:44,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2024-11-28 04:56:44,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451370235] [2024-11-28 04:56:44,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:56:44,248 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-28 04:56:44,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:56:44,248 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-28 04:56:44,249 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2024-11-28 04:56:44,551 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 75 [2024-11-28 04:56:44,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 84 transitions, 516 flow. Second operand has 12 states, 12 states have (on average 30.333333333333332) internal successors, (364), 12 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:56:44,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:56:44,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 75 [2024-11-28 04:56:44,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:56:46,812 INFO L124 PetriNetUnfolderBase]: 8550/13426 cut-off events. [2024-11-28 04:56:46,812 INFO L125 PetriNetUnfolderBase]: For 9091/9091 co-relation queries the response was YES. [2024-11-28 04:56:46,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35893 conditions, 13426 events. 8550/13426 cut-off events. For 9091/9091 co-relation queries the response was YES. Maximal size of possible extension queue 925. Compared 104527 event pairs, 4079 based on Foata normal form. 0/11096 useless extension candidates. Maximal degree in co-relation 28650. Up to 4949 conditions per place. [2024-11-28 04:56:46,899 INFO L140 encePairwiseOnDemand]: 64/75 looper letters, 101 selfloop transitions, 22 changer transitions 0/142 dead transitions. [2024-11-28 04:56:46,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 142 transitions, 953 flow [2024-11-28 04:56:46,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 04:56:46,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-28 04:56:46,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 302 transitions. [2024-11-28 04:56:46,901 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5752380952380952 [2024-11-28 04:56:46,901 INFO L175 Difference]: Start difference. First operand has 99 places, 84 transitions, 516 flow. Second operand 7 states and 302 transitions. [2024-11-28 04:56:46,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 142 transitions, 953 flow [2024-11-28 04:56:46,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 142 transitions, 904 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-28 04:56:46,907 INFO L231 Difference]: Finished difference. Result has 103 places, 86 transitions, 535 flow [2024-11-28 04:56:46,907 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=471, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=535, PETRI_PLACES=103, PETRI_TRANSITIONS=86} [2024-11-28 04:56:46,907 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 27 predicate places. [2024-11-28 04:56:46,907 INFO L471 AbstractCegarLoop]: Abstraction has has 103 places, 86 transitions, 535 flow [2024-11-28 04:56:46,908 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 30.333333333333332) internal successors, (364), 12 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:56:46,908 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:56:46,908 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:56:46,914 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b83a3f0-6a4c-469f-8152-51649e8f0a29/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-28 04:56:47,108 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b83a3f0-6a4c-469f-8152-51649e8f0a29/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-28 04:56:47,108 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-28 04:56:47,109 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:56:47,109 INFO L85 PathProgramCache]: Analyzing trace with hash -238337945, now seen corresponding path program 1 times [2024-11-28 04:56:47,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:56:47,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985700474] [2024-11-28 04:56:47,109 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:56:47,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:56:47,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:56:47,241 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 04:56:47,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:56:47,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985700474] [2024-11-28 04:56:47,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985700474] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:56:47,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:56:47,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 04:56:47,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136005602] [2024-11-28 04:56:47,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:56:47,242 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 04:56:47,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:56:47,243 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 04:56:47,243 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 04:56:47,269 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 75 [2024-11-28 04:56:47,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 86 transitions, 535 flow. Second operand has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:56:47,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:56:47,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 75 [2024-11-28 04:56:47,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:56:48,646 INFO L124 PetriNetUnfolderBase]: 7110/11106 cut-off events. [2024-11-28 04:56:48,646 INFO L125 PetriNetUnfolderBase]: For 10413/10413 co-relation queries the response was YES. [2024-11-28 04:56:48,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30969 conditions, 11106 events. 7110/11106 cut-off events. For 10413/10413 co-relation queries the response was YES. Maximal size of possible extension queue 672. Compared 85447 event pairs, 6302 based on Foata normal form. 0/9568 useless extension candidates. Maximal degree in co-relation 24457. Up to 9877 conditions per place. [2024-11-28 04:56:48,706 INFO L140 encePairwiseOnDemand]: 71/75 looper letters, 54 selfloop transitions, 11 changer transitions 0/84 dead transitions. [2024-11-28 04:56:48,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 84 transitions, 652 flow [2024-11-28 04:56:48,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 04:56:48,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 04:56:48,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 162 transitions. [2024-11-28 04:56:48,708 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.432 [2024-11-28 04:56:48,708 INFO L175 Difference]: Start difference. First operand has 103 places, 86 transitions, 535 flow. Second operand 5 states and 162 transitions. [2024-11-28 04:56:48,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 84 transitions, 652 flow [2024-11-28 04:56:48,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 84 transitions, 620 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-28 04:56:48,712 INFO L231 Difference]: Finished difference. Result has 104 places, 84 transitions, 512 flow [2024-11-28 04:56:48,713 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=490, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=512, PETRI_PLACES=104, PETRI_TRANSITIONS=84} [2024-11-28 04:56:48,713 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 28 predicate places. [2024-11-28 04:56:48,713 INFO L471 AbstractCegarLoop]: Abstraction has has 104 places, 84 transitions, 512 flow [2024-11-28 04:56:48,713 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:56:48,713 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:56:48,713 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:56:48,713 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-28 04:56:48,713 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-28 04:56:48,714 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:56:48,714 INFO L85 PathProgramCache]: Analyzing trace with hash -238337944, now seen corresponding path program 1 times [2024-11-28 04:56:48,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:56:48,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54076976] [2024-11-28 04:56:48,714 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:56:48,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:56:48,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:56:48,941 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 04:56:48,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:56:48,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54076976] [2024-11-28 04:56:48,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54076976] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:56:48,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067843314] [2024-11-28 04:56:48,941 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:56:48,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:56:48,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b83a3f0-6a4c-469f-8152-51649e8f0a29/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:56:48,943 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b83a3f0-6a4c-469f-8152-51649e8f0a29/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:56:48,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b83a3f0-6a4c-469f-8152-51649e8f0a29/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-28 04:56:49,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:56:49,055 INFO L256 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-28 04:56:49,056 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:56:49,066 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-28 04:56:49,134 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-28 04:56:49,134 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-28 04:56:49,143 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-28 04:56:49,232 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 04:56:49,232 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:56:49,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067843314] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:56:49,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 04:56:49,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 8 [2024-11-28 04:56:49,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959064562] [2024-11-28 04:56:49,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:56:49,233 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 04:56:49,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:56:49,233 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 04:56:49,233 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-11-28 04:56:49,269 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 75 [2024-11-28 04:56:49,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 84 transitions, 512 flow. Second operand has 6 states, 6 states have (on average 27.0) internal successors, (162), 6 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:56:49,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:56:49,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 75 [2024-11-28 04:56:49,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:56:49,948 INFO L124 PetriNetUnfolderBase]: 4723/7690 cut-off events. [2024-11-28 04:56:49,948 INFO L125 PetriNetUnfolderBase]: For 8241/8241 co-relation queries the response was YES. [2024-11-28 04:56:49,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20762 conditions, 7690 events. 4723/7690 cut-off events. For 8241/8241 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 58309 event pairs, 4115 based on Foata normal form. 444/7241 useless extension candidates. Maximal degree in co-relation 16193. Up to 6665 conditions per place. [2024-11-28 04:56:49,993 INFO L140 encePairwiseOnDemand]: 70/75 looper letters, 49 selfloop transitions, 13 changer transitions 0/81 dead transitions. [2024-11-28 04:56:49,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 81 transitions, 619 flow [2024-11-28 04:56:49,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 04:56:49,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 04:56:49,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 161 transitions. [2024-11-28 04:56:49,995 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.42933333333333334 [2024-11-28 04:56:49,995 INFO L175 Difference]: Start difference. First operand has 104 places, 84 transitions, 512 flow. Second operand 5 states and 161 transitions. [2024-11-28 04:56:49,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 81 transitions, 619 flow [2024-11-28 04:56:50,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 81 transitions, 598 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-28 04:56:50,001 INFO L231 Difference]: Finished difference. Result has 100 places, 81 transitions, 500 flow [2024-11-28 04:56:50,001 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=474, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=500, PETRI_PLACES=100, PETRI_TRANSITIONS=81} [2024-11-28 04:56:50,002 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 24 predicate places. [2024-11-28 04:56:50,002 INFO L471 AbstractCegarLoop]: Abstraction has has 100 places, 81 transitions, 500 flow [2024-11-28 04:56:50,002 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 27.0) internal successors, (162), 6 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:56:50,002 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:56:50,002 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:56:50,012 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b83a3f0-6a4c-469f-8152-51649e8f0a29/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-28 04:56:50,206 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b83a3f0-6a4c-469f-8152-51649e8f0a29/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-28 04:56:50,206 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-28 04:56:50,207 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:56:50,207 INFO L85 PathProgramCache]: Analyzing trace with hash 651608561, now seen corresponding path program 1 times [2024-11-28 04:56:50,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:56:50,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313235902] [2024-11-28 04:56:50,207 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:56:50,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:56:50,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:56:50,335 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 04:56:50,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:56:50,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313235902] [2024-11-28 04:56:50,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313235902] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:56:50,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357774412] [2024-11-28 04:56:50,335 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:56:50,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:56:50,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b83a3f0-6a4c-469f-8152-51649e8f0a29/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:56:50,338 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b83a3f0-6a4c-469f-8152-51649e8f0a29/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:56:50,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b83a3f0-6a4c-469f-8152-51649e8f0a29/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-28 04:56:50,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:56:50,446 INFO L256 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 04:56:50,448 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:56:50,529 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 04:56:50,529 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:56:50,618 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 04:56:50,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357774412] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:56:50,618 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:56:50,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2024-11-28 04:56:50,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620791557] [2024-11-28 04:56:50,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:56:50,619 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-28 04:56:50,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:56:50,619 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-28 04:56:50,619 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2024-11-28 04:56:50,697 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 75 [2024-11-28 04:56:50,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 81 transitions, 500 flow. Second operand has 12 states, 12 states have (on average 29.916666666666668) internal successors, (359), 12 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:56:50,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:56:50,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 75 [2024-11-28 04:56:50,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:56:52,351 INFO L124 PetriNetUnfolderBase]: 8666/14494 cut-off events. [2024-11-28 04:56:52,351 INFO L125 PetriNetUnfolderBase]: For 11546/11546 co-relation queries the response was YES. [2024-11-28 04:56:52,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37317 conditions, 14494 events. 8666/14494 cut-off events. For 11546/11546 co-relation queries the response was YES. Maximal size of possible extension queue 850. Compared 120374 event pairs, 5136 based on Foata normal form. 532/13688 useless extension candidates. Maximal degree in co-relation 17444. Up to 5132 conditions per place. [2024-11-28 04:56:52,463 INFO L140 encePairwiseOnDemand]: 62/75 looper letters, 120 selfloop transitions, 47 changer transitions 0/186 dead transitions. [2024-11-28 04:56:52,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 186 transitions, 1331 flow [2024-11-28 04:56:52,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-28 04:56:52,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-28 04:56:52,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 473 transitions. [2024-11-28 04:56:52,466 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5255555555555556 [2024-11-28 04:56:52,466 INFO L175 Difference]: Start difference. First operand has 100 places, 81 transitions, 500 flow. Second operand 12 states and 473 transitions. [2024-11-28 04:56:52,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 186 transitions, 1331 flow [2024-11-28 04:56:52,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 186 transitions, 1297 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-28 04:56:52,479 INFO L231 Difference]: Finished difference. Result has 113 places, 107 transitions, 832 flow [2024-11-28 04:56:52,479 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=479, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=832, PETRI_PLACES=113, PETRI_TRANSITIONS=107} [2024-11-28 04:56:52,480 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 37 predicate places. [2024-11-28 04:56:52,480 INFO L471 AbstractCegarLoop]: Abstraction has has 113 places, 107 transitions, 832 flow [2024-11-28 04:56:52,480 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 29.916666666666668) internal successors, (359), 12 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:56:52,480 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:56:52,481 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:56:52,491 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b83a3f0-6a4c-469f-8152-51649e8f0a29/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-28 04:56:52,684 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b83a3f0-6a4c-469f-8152-51649e8f0a29/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:56:52,684 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting thread4Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-28 04:56:52,685 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:56:52,685 INFO L85 PathProgramCache]: Analyzing trace with hash 966127100, now seen corresponding path program 1 times [2024-11-28 04:56:52,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:56:52,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029612861] [2024-11-28 04:56:52,685 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:56:52,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:56:52,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:56:52,740 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:56:52,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:56:52,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029612861] [2024-11-28 04:56:52,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029612861] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:56:52,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:56:52,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-28 04:56:52,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242672566] [2024-11-28 04:56:52,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:56:52,742 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 04:56:52,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:56:52,743 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 04:56:52,743 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 04:56:52,747 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 75 [2024-11-28 04:56:52,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 107 transitions, 832 flow. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:56:52,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:56:52,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 75 [2024-11-28 04:56:52,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:56:54,177 INFO L124 PetriNetUnfolderBase]: 7518/12630 cut-off events. [2024-11-28 04:56:54,177 INFO L125 PetriNetUnfolderBase]: For 14108/14108 co-relation queries the response was YES. [2024-11-28 04:56:54,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34500 conditions, 12630 events. 7518/12630 cut-off events. For 14108/14108 co-relation queries the response was YES. Maximal size of possible extension queue 658. Compared 98801 event pairs, 3226 based on Foata normal form. 136/11711 useless extension candidates. Maximal degree in co-relation 18280. Up to 5737 conditions per place. [2024-11-28 04:56:54,277 INFO L140 encePairwiseOnDemand]: 71/75 looper letters, 105 selfloop transitions, 2 changer transitions 0/126 dead transitions. [2024-11-28 04:56:54,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 126 transitions, 1130 flow [2024-11-28 04:56:54,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 04:56:54,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-28 04:56:54,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 138 transitions. [2024-11-28 04:56:54,278 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6133333333333333 [2024-11-28 04:56:54,278 INFO L175 Difference]: Start difference. First operand has 113 places, 107 transitions, 832 flow. Second operand 3 states and 138 transitions. [2024-11-28 04:56:54,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 126 transitions, 1130 flow [2024-11-28 04:56:54,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 126 transitions, 1088 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-11-28 04:56:54,291 INFO L231 Difference]: Finished difference. Result has 114 places, 107 transitions, 804 flow [2024-11-28 04:56:54,291 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=794, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=804, PETRI_PLACES=114, PETRI_TRANSITIONS=107} [2024-11-28 04:56:54,292 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 38 predicate places. [2024-11-28 04:56:54,292 INFO L471 AbstractCegarLoop]: Abstraction has has 114 places, 107 transitions, 804 flow [2024-11-28 04:56:54,292 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:56:54,292 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:56:54,292 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:56:54,292 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-11-28 04:56:54,292 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-28 04:56:54,293 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:56:54,293 INFO L85 PathProgramCache]: Analyzing trace with hash -743591860, now seen corresponding path program 1 times [2024-11-28 04:56:54,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:56:54,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950471430] [2024-11-28 04:56:54,293 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:56:54,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:56:54,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:56:54,452 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 04:56:54,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:56:54,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950471430] [2024-11-28 04:56:54,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950471430] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:56:54,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544758424] [2024-11-28 04:56:54,453 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:56:54,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:56:54,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b83a3f0-6a4c-469f-8152-51649e8f0a29/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:56:54,455 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b83a3f0-6a4c-469f-8152-51649e8f0a29/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:56:54,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b83a3f0-6a4c-469f-8152-51649e8f0a29/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-28 04:56:54,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:56:54,591 INFO L256 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 04:56:54,593 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:56:54,676 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 04:56:54,676 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:56:54,764 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 04:56:54,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544758424] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:56:54,765 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:56:54,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-11-28 04:56:54,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637656472] [2024-11-28 04:56:54,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:56:54,767 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-28 04:56:54,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:56:54,769 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-28 04:56:54,769 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2024-11-28 04:56:54,858 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 75 [2024-11-28 04:56:54,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 107 transitions, 804 flow. Second operand has 12 states, 12 states have (on average 30.083333333333332) internal successors, (361), 12 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:56:54,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:56:54,859 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 75 [2024-11-28 04:56:54,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand