./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-more-buffer-mult3.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 826ab2ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9bc070-51d1-4496-b831-70105f5203b8/bin/uautomizer-verify-qhAvR1uOyd/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9bc070-51d1-4496-b831-70105f5203b8/bin/uautomizer-verify-qhAvR1uOyd/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9bc070-51d1-4496-b831-70105f5203b8/bin/uautomizer-verify-qhAvR1uOyd/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9bc070-51d1-4496-b831-70105f5203b8/bin/uautomizer-verify-qhAvR1uOyd/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-buffer-mult3.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9bc070-51d1-4496-b831-70105f5203b8/bin/uautomizer-verify-qhAvR1uOyd/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9bc070-51d1-4496-b831-70105f5203b8/bin/uautomizer-verify-qhAvR1uOyd --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7888761977ccc49b1a75199021e374591654c6a4364e63bfc6c86e1c7bb7d64b --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-13 15:34:02,367 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-13 15:34:02,463 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9bc070-51d1-4496-b831-70105f5203b8/bin/uautomizer-verify-qhAvR1uOyd/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-13 15:34:02,469 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-13 15:34:02,472 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-13 15:34:02,516 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-13 15:34:02,518 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-13 15:34:02,518 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-13 15:34:02,519 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-13 15:34:02,519 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-13 15:34:02,520 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-13 15:34:02,521 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-13 15:34:02,521 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-13 15:34:02,521 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-13 15:34:02,522 INFO L153 SettingsManager]: * Use SBE=true [2024-11-13 15:34:02,522 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-13 15:34:02,522 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-13 15:34:02,522 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-13 15:34:02,522 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-13 15:34:02,522 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-13 15:34:02,522 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-13 15:34:02,522 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-13 15:34:02,522 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-13 15:34:02,522 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-13 15:34:02,523 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-13 15:34:02,523 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-13 15:34:02,523 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-13 15:34:02,523 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-13 15:34:02,523 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-13 15:34:02,523 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-13 15:34:02,523 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-13 15:34:02,523 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-13 15:34:02,523 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-13 15:34:02,523 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 15:34:02,524 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-13 15:34:02,524 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-13 15:34:02,524 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-13 15:34:02,524 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-13 15:34:02,524 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-13 15:34:02,524 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-13 15:34:02,524 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-13 15:34:02,524 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-13 15:34:02,524 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_fc9bc070-51d1-4496-b831-70105f5203b8/bin/uautomizer-verify-qhAvR1uOyd Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7888761977ccc49b1a75199021e374591654c6a4364e63bfc6c86e1c7bb7d64b [2024-11-13 15:34:02,886 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-13 15:34:02,895 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-13 15:34:02,900 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-13 15:34:02,901 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-13 15:34:02,902 INFO L274 PluginConnector]: CDTParser initialized [2024-11-13 15:34:02,903 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9bc070-51d1-4496-b831-70105f5203b8/bin/uautomizer-verify-qhAvR1uOyd/../../sv-benchmarks/c/weaver/popl20-more-buffer-mult3.wvr.c Unable to find full path for "g++" [2024-11-13 15:34:05,142 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-13 15:34:05,452 INFO L384 CDTParser]: Found 1 translation units. [2024-11-13 15:34:05,455 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9bc070-51d1-4496-b831-70105f5203b8/sv-benchmarks/c/weaver/popl20-more-buffer-mult3.wvr.c [2024-11-13 15:34:05,468 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9bc070-51d1-4496-b831-70105f5203b8/bin/uautomizer-verify-qhAvR1uOyd/data/54876aa90/14c99b1cd9ef412fa55f8ad71f67ca63/FLAG7ebb2b739 [2024-11-13 15:34:05,754 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9bc070-51d1-4496-b831-70105f5203b8/bin/uautomizer-verify-qhAvR1uOyd/data/54876aa90/14c99b1cd9ef412fa55f8ad71f67ca63 [2024-11-13 15:34:05,757 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-13 15:34:05,759 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-13 15:34:05,761 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-13 15:34:05,761 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-13 15:34:05,766 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-13 15:34:05,767 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 03:34:05" (1/1) ... [2024-11-13 15:34:05,769 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c4d8d4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:34:05, skipping insertion in model container [2024-11-13 15:34:05,769 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 03:34:05" (1/1) ... [2024-11-13 15:34:05,797 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-13 15:34:06,076 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-13 15:34:06,080 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 15:34:06,101 INFO L200 MainTranslator]: Completed pre-run [2024-11-13 15:34:06,139 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 15:34:06,161 INFO L204 MainTranslator]: Completed translation [2024-11-13 15:34:06,162 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:34:06 WrapperNode [2024-11-13 15:34:06,162 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-13 15:34:06,163 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-13 15:34:06,163 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-13 15:34:06,163 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-13 15:34:06,169 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:34:06" (1/1) ... [2024-11-13 15:34:06,178 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:34:06" (1/1) ... [2024-11-13 15:34:06,215 INFO L138 Inliner]: procedures = 26, calls = 61, calls flagged for inlining = 19, calls inlined = 23, statements flattened = 292 [2024-11-13 15:34:06,215 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-13 15:34:06,216 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-13 15:34:06,216 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-13 15:34:06,216 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-13 15:34:06,224 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:34:06" (1/1) ... [2024-11-13 15:34:06,225 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:34:06" (1/1) ... [2024-11-13 15:34:06,229 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:34:06" (1/1) ... [2024-11-13 15:34:06,248 INFO L175 MemorySlicer]: Split 8 memory accesses to 2 slices as follows [2, 6]. 75 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-11-13 15:34:06,248 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:34:06" (1/1) ... [2024-11-13 15:34:06,248 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:34:06" (1/1) ... [2024-11-13 15:34:06,259 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:34:06" (1/1) ... [2024-11-13 15:34:06,264 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:34:06" (1/1) ... [2024-11-13 15:34:06,266 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:34:06" (1/1) ... [2024-11-13 15:34:06,268 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:34:06" (1/1) ... [2024-11-13 15:34:06,272 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-13 15:34:06,272 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-13 15:34:06,273 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-13 15:34:06,273 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-13 15:34:06,274 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:34:06" (1/1) ... [2024-11-13 15:34:06,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 15:34:06,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9bc070-51d1-4496-b831-70105f5203b8/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:34:06,321 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9bc070-51d1-4496-b831-70105f5203b8/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-13 15:34:06,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9bc070-51d1-4496-b831-70105f5203b8/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-13 15:34:06,361 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-13 15:34:06,361 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-13 15:34:06,362 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-13 15:34:06,362 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-13 15:34:06,362 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-13 15:34:06,363 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-13 15:34:06,363 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-13 15:34:06,363 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-13 15:34:06,363 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-13 15:34:06,364 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-13 15:34:06,364 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-13 15:34:06,364 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2024-11-13 15:34:06,364 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2024-11-13 15:34:06,364 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-13 15:34:06,364 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-13 15:34:06,364 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-13 15:34:06,364 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-13 15:34:06,364 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-13 15:34:06,364 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-13 15:34:06,364 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-13 15:34:06,368 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-13 15:34:06,561 INFO L238 CfgBuilder]: Building ICFG [2024-11-13 15:34:06,563 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-13 15:34:07,360 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-13 15:34:07,360 INFO L287 CfgBuilder]: Performing block encoding [2024-11-13 15:34:07,916 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-13 15:34:07,916 INFO L316 CfgBuilder]: Removed 6 assume(true) statements. [2024-11-13 15:34:07,918 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 03:34:07 BoogieIcfgContainer [2024-11-13 15:34:07,918 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-13 15:34:07,921 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-13 15:34:07,922 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-13 15:34:07,927 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-13 15:34:07,927 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 03:34:05" (1/3) ... [2024-11-13 15:34:07,928 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d082b59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 03:34:07, skipping insertion in model container [2024-11-13 15:34:07,928 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:34:06" (2/3) ... [2024-11-13 15:34:07,928 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d082b59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 03:34:07, skipping insertion in model container [2024-11-13 15:34:07,928 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 03:34:07" (3/3) ... [2024-11-13 15:34:07,932 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-buffer-mult3.wvr.c [2024-11-13 15:34:07,952 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-13 15:34:07,954 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-more-buffer-mult3.wvr.c that has 5 procedures, 61 locations, 1 initial locations, 6 loop locations, and 14 error locations. [2024-11-13 15:34:07,954 INFO L492 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-13 15:34:08,113 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-11-13 15:34:08,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 73 places, 66 transitions, 160 flow [2024-11-13 15:34:08,228 INFO L124 PetriNetUnfolderBase]: 6/62 cut-off events. [2024-11-13 15:34:08,234 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-13 15:34:08,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79 conditions, 62 events. 6/62 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 146 event pairs, 0 based on Foata normal form. 0/42 useless extension candidates. Maximal degree in co-relation 49. Up to 2 conditions per place. [2024-11-13 15:34:08,240 INFO L82 GeneralOperation]: Start removeDead. Operand has 73 places, 66 transitions, 160 flow [2024-11-13 15:34:08,246 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 68 places, 61 transitions, 146 flow [2024-11-13 15:34:08,258 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-13 15:34:08,284 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;@5a619224, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-13 15:34:08,284 INFO L334 AbstractCegarLoop]: Starting to check reachability of 26 error locations. [2024-11-13 15:34:08,290 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-13 15:34:08,292 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-13 15:34:08,292 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-13 15:34:08,292 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 15:34:08,294 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-13 15:34:08,294 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-13 15:34:08,300 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:34:08,301 INFO L85 PathProgramCache]: Analyzing trace with hash 849056, now seen corresponding path program 1 times [2024-11-13 15:34:08,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:34:08,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690329446] [2024-11-13 15:34:08,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:34:08,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:34:08,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:34:08,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:34:08,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:34:08,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690329446] [2024-11-13 15:34:08,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690329446] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:34:08,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:34:08,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-13 15:34:08,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279426809] [2024-11-13 15:34:08,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:34:08,716 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 15:34:08,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:34:08,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 15:34:08,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 15:34:08,785 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 66 [2024-11-13 15:34:08,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 61 transitions, 146 flow. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:34:08,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 15:34:08,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 66 [2024-11-13 15:34:08,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 15:34:11,475 INFO L124 PetriNetUnfolderBase]: 9651/13484 cut-off events. [2024-11-13 15:34:11,475 INFO L125 PetriNetUnfolderBase]: For 298/298 co-relation queries the response was YES. [2024-11-13 15:34:11,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26018 conditions, 13484 events. 9651/13484 cut-off events. For 298/298 co-relation queries the response was YES. Maximal size of possible extension queue 1096. Compared 88201 event pairs, 6408 based on Foata normal form. 1/7977 useless extension candidates. Maximal degree in co-relation 24428. Up to 11896 conditions per place. [2024-11-13 15:34:11,660 INFO L140 encePairwiseOnDemand]: 61/66 looper letters, 36 selfloop transitions, 2 changer transitions 0/57 dead transitions. [2024-11-13 15:34:11,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 57 transitions, 214 flow [2024-11-13 15:34:11,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 15:34:11,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-13 15:34:11,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 113 transitions. [2024-11-13 15:34:11,679 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5707070707070707 [2024-11-13 15:34:11,682 INFO L175 Difference]: Start difference. First operand has 68 places, 61 transitions, 146 flow. Second operand 3 states and 113 transitions. [2024-11-13 15:34:11,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 57 transitions, 214 flow [2024-11-13 15:34:11,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 57 transitions, 198 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-11-13 15:34:11,722 INFO L231 Difference]: Finished difference. Result has 58 places, 57 transitions, 126 flow [2024-11-13 15:34:11,727 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=126, PETRI_PLACES=58, PETRI_TRANSITIONS=57} [2024-11-13 15:34:11,734 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, -10 predicate places. [2024-11-13 15:34:11,736 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 57 transitions, 126 flow [2024-11-13 15:34:11,736 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:34:11,736 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 15:34:11,736 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-13 15:34:11,737 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-13 15:34:11,738 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-13 15:34:11,739 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:34:11,739 INFO L85 PathProgramCache]: Analyzing trace with hash 849057, now seen corresponding path program 1 times [2024-11-13 15:34:11,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:34:11,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696343181] [2024-11-13 15:34:11,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:34:11,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:34:11,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:34:12,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:34:12,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:34:12,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696343181] [2024-11-13 15:34:12,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696343181] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:34:12,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:34:12,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-13 15:34:12,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540742646] [2024-11-13 15:34:12,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:34:12,316 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 15:34:12,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:34:12,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 15:34:12,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 15:34:12,352 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 66 [2024-11-13 15:34:12,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 57 transitions, 126 flow. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:34:12,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 15:34:12,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 66 [2024-11-13 15:34:12,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 15:34:14,479 INFO L124 PetriNetUnfolderBase]: 9652/13487 cut-off events. [2024-11-13 15:34:14,480 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2024-11-13 15:34:14,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25621 conditions, 13487 events. 9652/13487 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 1096. Compared 87959 event pairs, 6408 based on Foata normal form. 0/7977 useless extension candidates. Maximal degree in co-relation 25592. Up to 11905 conditions per place. [2024-11-13 15:34:14,592 INFO L140 encePairwiseOnDemand]: 61/66 looper letters, 39 selfloop transitions, 4 changer transitions 0/60 dead transitions. [2024-11-13 15:34:14,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 60 transitions, 218 flow [2024-11-13 15:34:14,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 15:34:14,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-13 15:34:14,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 140 transitions. [2024-11-13 15:34:14,597 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5303030303030303 [2024-11-13 15:34:14,598 INFO L175 Difference]: Start difference. First operand has 58 places, 57 transitions, 126 flow. Second operand 4 states and 140 transitions. [2024-11-13 15:34:14,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 60 transitions, 218 flow [2024-11-13 15:34:14,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 60 transitions, 214 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-13 15:34:14,600 INFO L231 Difference]: Finished difference. Result has 61 places, 60 transitions, 149 flow [2024-11-13 15:34:14,604 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=149, PETRI_PLACES=61, PETRI_TRANSITIONS=60} [2024-11-13 15:34:14,605 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, -7 predicate places. [2024-11-13 15:34:14,605 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 60 transitions, 149 flow [2024-11-13 15:34:14,605 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:34:14,605 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 15:34:14,606 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-13 15:34:14,606 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-13 15:34:14,606 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-13 15:34:14,607 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:34:14,608 INFO L85 PathProgramCache]: Analyzing trace with hash 26322624, now seen corresponding path program 1 times [2024-11-13 15:34:14,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:34:14,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511287817] [2024-11-13 15:34:14,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:34:14,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:34:14,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:34:15,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:34:15,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:34:15,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511287817] [2024-11-13 15:34:15,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511287817] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:34:15,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:34:15,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 15:34:15,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288485079] [2024-11-13 15:34:15,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:34:15,041 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 15:34:15,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:34:15,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 15:34:15,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-13 15:34:15,071 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 66 [2024-11-13 15:34:15,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 60 transitions, 149 flow. Second operand has 5 states, 5 states have (on average 24.8) internal successors, (124), 5 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:34:15,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 15:34:15,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 66 [2024-11-13 15:34:15,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 15:34:17,116 INFO L124 PetriNetUnfolderBase]: 9653/13490 cut-off events. [2024-11-13 15:34:17,116 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2024-11-13 15:34:17,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25638 conditions, 13490 events. 9653/13490 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 1096. Compared 88221 event pairs, 6408 based on Foata normal form. 0/7979 useless extension candidates. Maximal degree in co-relation 25613. Up to 11904 conditions per place. [2024-11-13 15:34:17,223 INFO L140 encePairwiseOnDemand]: 58/66 looper letters, 39 selfloop transitions, 7 changer transitions 0/63 dead transitions. [2024-11-13 15:34:17,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 63 transitions, 247 flow [2024-11-13 15:34:17,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 15:34:17,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-13 15:34:17,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 167 transitions. [2024-11-13 15:34:17,225 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5060606060606061 [2024-11-13 15:34:17,225 INFO L175 Difference]: Start difference. First operand has 61 places, 60 transitions, 149 flow. Second operand 5 states and 167 transitions. [2024-11-13 15:34:17,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 63 transitions, 247 flow [2024-11-13 15:34:17,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 63 transitions, 244 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-13 15:34:17,230 INFO L231 Difference]: Finished difference. Result has 66 places, 63 transitions, 183 flow [2024-11-13 15:34:17,230 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=183, PETRI_PLACES=66, PETRI_TRANSITIONS=63} [2024-11-13 15:34:17,231 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, -2 predicate places. [2024-11-13 15:34:17,231 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 63 transitions, 183 flow [2024-11-13 15:34:17,231 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.8) internal successors, (124), 5 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:34:17,231 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 15:34:17,232 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-13 15:34:17,232 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-13 15:34:17,232 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-13 15:34:17,232 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:34:17,232 INFO L85 PathProgramCache]: Analyzing trace with hash 815971179, now seen corresponding path program 1 times [2024-11-13 15:34:17,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:34:17,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530714820] [2024-11-13 15:34:17,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:34:17,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:34:17,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:34:17,697 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:34:17,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:34:17,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530714820] [2024-11-13 15:34:17,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530714820] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:34:17,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133978853] [2024-11-13 15:34:17,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:34:17,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:34:17,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9bc070-51d1-4496-b831-70105f5203b8/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:34:17,702 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9bc070-51d1-4496-b831-70105f5203b8/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:34:17,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9bc070-51d1-4496-b831-70105f5203b8/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-13 15:34:17,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:34:17,819 INFO L255 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-13 15:34:17,824 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:34:17,916 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-13 15:34:18,214 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:34:18,215 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:34:18,370 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:34:18,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133978853] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:34:18,371 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:34:18,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-13 15:34:18,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574630428] [2024-11-13 15:34:18,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:34:18,373 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-13 15:34:18,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:34:18,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-13 15:34:18,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-11-13 15:34:18,486 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 66 [2024-11-13 15:34:18,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 63 transitions, 183 flow. Second operand has 11 states, 11 states have (on average 25.363636363636363) internal successors, (279), 11 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:34:18,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 15:34:18,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 66 [2024-11-13 15:34:18,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 15:34:20,395 INFO L124 PetriNetUnfolderBase]: 9654/13492 cut-off events. [2024-11-13 15:34:20,396 INFO L125 PetriNetUnfolderBase]: For 31/31 co-relation queries the response was YES. [2024-11-13 15:34:20,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25661 conditions, 13492 events. 9654/13492 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 1096. Compared 87927 event pairs, 6408 based on Foata normal form. 0/7984 useless extension candidates. Maximal degree in co-relation 25623. Up to 11905 conditions per place. [2024-11-13 15:34:20,479 INFO L140 encePairwiseOnDemand]: 61/66 looper letters, 38 selfloop transitions, 10 changer transitions 0/65 dead transitions. [2024-11-13 15:34:20,479 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 65 transitions, 290 flow [2024-11-13 15:34:20,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-13 15:34:20,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-13 15:34:20,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 239 transitions. [2024-11-13 15:34:20,482 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45265151515151514 [2024-11-13 15:34:20,482 INFO L175 Difference]: Start difference. First operand has 66 places, 63 transitions, 183 flow. Second operand 8 states and 239 transitions. [2024-11-13 15:34:20,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 65 transitions, 290 flow [2024-11-13 15:34:20,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 65 transitions, 289 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-13 15:34:20,484 INFO L231 Difference]: Finished difference. Result has 71 places, 65 transitions, 213 flow [2024-11-13 15:34:20,485 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=213, PETRI_PLACES=71, PETRI_TRANSITIONS=65} [2024-11-13 15:34:20,485 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, 3 predicate places. [2024-11-13 15:34:20,485 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 65 transitions, 213 flow [2024-11-13 15:34:20,486 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 25.363636363636363) internal successors, (279), 11 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:34:20,486 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 15:34:20,486 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-11-13 15:34:20,507 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9bc070-51d1-4496-b831-70105f5203b8/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-13 15:34:20,690 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9bc070-51d1-4496-b831-70105f5203b8/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:34:20,690 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-13 15:34:20,691 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:34:20,691 INFO L85 PathProgramCache]: Analyzing trace with hash -473734370, now seen corresponding path program 1 times [2024-11-13 15:34:20,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:34:20,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611272910] [2024-11-13 15:34:20,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:34:20,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:34:20,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:34:21,045 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:34:21,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:34:21,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611272910] [2024-11-13 15:34:21,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611272910] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:34:21,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594042242] [2024-11-13 15:34:21,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:34:21,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:34:21,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9bc070-51d1-4496-b831-70105f5203b8/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:34:21,048 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9bc070-51d1-4496-b831-70105f5203b8/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:34:21,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9bc070-51d1-4496-b831-70105f5203b8/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-13 15:34:21,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:34:21,148 INFO L255 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-13 15:34:21,150 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:34:21,177 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-13 15:34:21,442 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:34:21,442 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:34:21,787 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:34:21,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594042242] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:34:21,788 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:34:21,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-13 15:34:21,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192816263] [2024-11-13 15:34:21,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:34:21,789 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-13 15:34:21,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:34:21,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-13 15:34:21,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2024-11-13 15:34:21,927 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 66 [2024-11-13 15:34:21,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 65 transitions, 213 flow. Second operand has 13 states, 13 states have (on average 25.307692307692307) internal successors, (329), 13 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:34:21,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 15:34:21,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 66 [2024-11-13 15:34:21,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 15:34:23,600 INFO L124 PetriNetUnfolderBase]: 9654/13491 cut-off events. [2024-11-13 15:34:23,600 INFO L125 PetriNetUnfolderBase]: For 31/31 co-relation queries the response was YES. [2024-11-13 15:34:23,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25668 conditions, 13491 events. 9654/13491 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 1096. Compared 87964 event pairs, 6408 based on Foata normal form. 0/7984 useless extension candidates. Maximal degree in co-relation 25622. Up to 11896 conditions per place. [2024-11-13 15:34:23,667 INFO L140 encePairwiseOnDemand]: 58/66 looper letters, 32 selfloop transitions, 15 changer transitions 0/64 dead transitions. [2024-11-13 15:34:23,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 64 transitions, 303 flow [2024-11-13 15:34:23,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-13 15:34:23,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-13 15:34:23,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 213 transitions. [2024-11-13 15:34:23,669 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.461038961038961 [2024-11-13 15:34:23,669 INFO L175 Difference]: Start difference. First operand has 71 places, 65 transitions, 213 flow. Second operand 7 states and 213 transitions. [2024-11-13 15:34:23,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 64 transitions, 303 flow [2024-11-13 15:34:23,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 64 transitions, 256 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-11-13 15:34:23,672 INFO L231 Difference]: Finished difference. Result has 68 places, 64 transitions, 192 flow [2024-11-13 15:34:23,672 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=192, PETRI_PLACES=68, PETRI_TRANSITIONS=64} [2024-11-13 15:34:23,673 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, 0 predicate places. [2024-11-13 15:34:23,673 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 64 transitions, 192 flow [2024-11-13 15:34:23,673 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 25.307692307692307) internal successors, (329), 13 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:34:23,673 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 15:34:23,674 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:34:23,691 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9bc070-51d1-4496-b831-70105f5203b8/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-13 15:34:23,878 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9bc070-51d1-4496-b831-70105f5203b8/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:34:23,878 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-13 15:34:23,878 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:34:23,878 INFO L85 PathProgramCache]: Analyzing trace with hash 116440569, now seen corresponding path program 1 times [2024-11-13 15:34:23,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:34:23,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101340440] [2024-11-13 15:34:23,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:34:23,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:34:23,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:34:24,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:34:24,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:34:24,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101340440] [2024-11-13 15:34:24,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101340440] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:34:24,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:34:24,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-13 15:34:24,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917276854] [2024-11-13 15:34:24,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:34:24,013 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 15:34:24,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:34:24,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 15:34:24,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 15:34:24,022 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 66 [2024-11-13 15:34:24,023 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 64 transitions, 192 flow. Second operand has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:34:24,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 15:34:24,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 66 [2024-11-13 15:34:24,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 15:34:25,652 INFO L124 PetriNetUnfolderBase]: 10697/14782 cut-off events. [2024-11-13 15:34:25,653 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2024-11-13 15:34:25,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28419 conditions, 14782 events. 10697/14782 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 1147. Compared 96578 event pairs, 7188 based on Foata normal form. 310/9059 useless extension candidates. Maximal degree in co-relation 25266. Up to 11908 conditions per place. [2024-11-13 15:34:25,740 INFO L140 encePairwiseOnDemand]: 55/66 looper letters, 72 selfloop transitions, 5 changer transitions 0/94 dead transitions. [2024-11-13 15:34:25,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 94 transitions, 440 flow [2024-11-13 15:34:25,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 15:34:25,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-13 15:34:25,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 207 transitions. [2024-11-13 15:34:25,742 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6272727272727273 [2024-11-13 15:34:25,742 INFO L175 Difference]: Start difference. First operand has 68 places, 64 transitions, 192 flow. Second operand 5 states and 207 transitions. [2024-11-13 15:34:25,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 94 transitions, 440 flow [2024-11-13 15:34:25,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 94 transitions, 399 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-11-13 15:34:25,746 INFO L231 Difference]: Finished difference. Result has 69 places, 66 transitions, 204 flow [2024-11-13 15:34:25,746 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=204, PETRI_PLACES=69, PETRI_TRANSITIONS=66} [2024-11-13 15:34:25,747 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, 1 predicate places. [2024-11-13 15:34:25,747 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 66 transitions, 204 flow [2024-11-13 15:34:25,747 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:34:25,747 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 15:34:25,747 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:34:25,748 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-13 15:34:25,748 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-13 15:34:25,748 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:34:25,748 INFO L85 PathProgramCache]: Analyzing trace with hash 599369071, now seen corresponding path program 1 times [2024-11-13 15:34:25,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:34:25,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12551651] [2024-11-13 15:34:25,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:34:25,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:34:25,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:34:25,937 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 15:34:25,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:34:25,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12551651] [2024-11-13 15:34:25,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12551651] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:34:25,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:34:25,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-13 15:34:25,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600337879] [2024-11-13 15:34:25,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:34:25,938 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 15:34:25,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:34:25,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 15:34:25,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 15:34:25,958 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 66 [2024-11-13 15:34:25,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 66 transitions, 204 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) [2024-11-13 15:34:25,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 15:34:25,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 66 [2024-11-13 15:34:25,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 15:34:27,084 INFO L124 PetriNetUnfolderBase]: 7340/10716 cut-off events. [2024-11-13 15:34:27,085 INFO L125 PetriNetUnfolderBase]: For 1020/1020 co-relation queries the response was YES. [2024-11-13 15:34:27,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22221 conditions, 10716 events. 7340/10716 cut-off events. For 1020/1020 co-relation queries the response was YES. Maximal size of possible extension queue 802. Compared 73015 event pairs, 5000 based on Foata normal form. 0/6858 useless extension candidates. Maximal degree in co-relation 19093. Up to 9261 conditions per place. [2024-11-13 15:34:27,125 INFO L140 encePairwiseOnDemand]: 61/66 looper letters, 40 selfloop transitions, 7 changer transitions 0/64 dead transitions. [2024-11-13 15:34:27,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 64 transitions, 290 flow [2024-11-13 15:34:27,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 15:34:27,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-13 15:34:27,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 158 transitions. [2024-11-13 15:34:27,127 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47878787878787876 [2024-11-13 15:34:27,127 INFO L175 Difference]: Start difference. First operand has 69 places, 66 transitions, 204 flow. Second operand 5 states and 158 transitions. [2024-11-13 15:34:27,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 64 transitions, 290 flow [2024-11-13 15:34:27,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 64 transitions, 285 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-13 15:34:27,130 INFO L231 Difference]: Finished difference. Result has 69 places, 64 transitions, 205 flow [2024-11-13 15:34:27,130 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=191, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=205, PETRI_PLACES=69, PETRI_TRANSITIONS=64} [2024-11-13 15:34:27,131 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, 1 predicate places. [2024-11-13 15:34:27,131 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 64 transitions, 205 flow [2024-11-13 15:34:27,131 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) [2024-11-13 15:34:27,131 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 15:34:27,131 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:34:27,132 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-13 15:34:27,132 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-13 15:34:27,132 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:34:27,132 INFO L85 PathProgramCache]: Analyzing trace with hash 599369072, now seen corresponding path program 1 times [2024-11-13 15:34:27,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:34:27,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224141087] [2024-11-13 15:34:27,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:34:27,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:34:27,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:34:27,453 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:34:27,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:34:27,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224141087] [2024-11-13 15:34:27,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224141087] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:34:27,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858914391] [2024-11-13 15:34:27,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:34:27,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:34:27,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9bc070-51d1-4496-b831-70105f5203b8/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:34:27,457 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9bc070-51d1-4496-b831-70105f5203b8/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:34:27,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9bc070-51d1-4496-b831-70105f5203b8/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-13 15:34:27,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:34:27,558 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-13 15:34:27,560 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:34:27,571 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-13 15:34:27,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 15:34:27,655 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-13 15:34:27,675 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-13 15:34:27,676 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-13 15:34:27,723 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:34:27,723 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 15:34:27,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858914391] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:34:27,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-13 15:34:27,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 6 [2024-11-13 15:34:27,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315509847] [2024-11-13 15:34:27,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:34:27,724 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 15:34:27,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:34:27,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 15:34:27,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-13 15:34:27,748 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 66 [2024-11-13 15:34:27,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 64 transitions, 205 flow. Second operand has 5 states, 5 states have (on average 25.4) internal successors, (127), 5 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:34:27,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 15:34:27,749 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 66 [2024-11-13 15:34:27,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 15:34:28,335 INFO L124 PetriNetUnfolderBase]: 4702/7066 cut-off events. [2024-11-13 15:34:28,336 INFO L125 PetriNetUnfolderBase]: For 804/804 co-relation queries the response was YES. [2024-11-13 15:34:28,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14086 conditions, 7066 events. 4702/7066 cut-off events. For 804/804 co-relation queries the response was YES. Maximal size of possible extension queue 548. Compared 47428 event pairs, 3256 based on Foata normal form. 0/5051 useless extension candidates. Maximal degree in co-relation 10914. Up to 6050 conditions per place. [2024-11-13 15:34:28,373 INFO L140 encePairwiseOnDemand]: 62/66 looper letters, 41 selfloop transitions, 4 changer transitions 0/62 dead transitions. [2024-11-13 15:34:28,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 62 transitions, 287 flow [2024-11-13 15:34:28,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 15:34:28,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-13 15:34:28,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 132 transitions. [2024-11-13 15:34:28,375 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-11-13 15:34:28,375 INFO L175 Difference]: Start difference. First operand has 69 places, 64 transitions, 205 flow. Second operand 4 states and 132 transitions. [2024-11-13 15:34:28,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 62 transitions, 287 flow [2024-11-13 15:34:28,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 62 transitions, 276 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-13 15:34:28,378 INFO L231 Difference]: Finished difference. Result has 67 places, 62 transitions, 194 flow [2024-11-13 15:34:28,378 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=194, PETRI_PLACES=67, PETRI_TRANSITIONS=62} [2024-11-13 15:34:28,379 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, -1 predicate places. [2024-11-13 15:34:28,379 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 62 transitions, 194 flow [2024-11-13 15:34:28,379 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.4) internal successors, (127), 5 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:34:28,379 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 15:34:28,380 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:34:28,404 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9bc070-51d1-4496-b831-70105f5203b8/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-13 15:34:28,584 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9bc070-51d1-4496-b831-70105f5203b8/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-11-13 15:34:28,584 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-13 15:34:28,584 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:34:28,584 INFO L85 PathProgramCache]: Analyzing trace with hash -965480565, now seen corresponding path program 1 times [2024-11-13 15:34:28,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:34:28,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563440097] [2024-11-13 15:34:28,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:34:28,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:34:28,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:34:28,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:34:28,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:34:28,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563440097] [2024-11-13 15:34:28,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563440097] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:34:28,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:34:28,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 15:34:28,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156079535] [2024-11-13 15:34:28,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:34:28,667 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 15:34:28,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:34:28,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 15:34:28,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 15:34:28,682 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 66 [2024-11-13 15:34:28,682 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 62 transitions, 194 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) [2024-11-13 15:34:28,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 15:34:28,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 66 [2024-11-13 15:34:28,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 15:34:29,231 INFO L124 PetriNetUnfolderBase]: 3152/5003 cut-off events. [2024-11-13 15:34:29,231 INFO L125 PetriNetUnfolderBase]: For 565/565 co-relation queries the response was YES. [2024-11-13 15:34:29,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9811 conditions, 5003 events. 3152/5003 cut-off events. For 565/565 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 33682 event pairs, 2196 based on Foata normal form. 0/3984 useless extension candidates. Maximal degree in co-relation 7627. Up to 4084 conditions per place. [2024-11-13 15:34:29,250 INFO L140 encePairwiseOnDemand]: 62/66 looper letters, 39 selfloop transitions, 4 changer transitions 0/60 dead transitions. [2024-11-13 15:34:29,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 60 transitions, 276 flow [2024-11-13 15:34:29,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 15:34:29,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-13 15:34:29,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 130 transitions. [2024-11-13 15:34:29,252 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49242424242424243 [2024-11-13 15:34:29,252 INFO L175 Difference]: Start difference. First operand has 67 places, 62 transitions, 194 flow. Second operand 4 states and 130 transitions. [2024-11-13 15:34:29,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 60 transitions, 276 flow [2024-11-13 15:34:29,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 60 transitions, 271 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-13 15:34:29,254 INFO L231 Difference]: Finished difference. Result has 66 places, 60 transitions, 193 flow [2024-11-13 15:34:29,255 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=185, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=193, PETRI_PLACES=66, PETRI_TRANSITIONS=60} [2024-11-13 15:34:29,255 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, -2 predicate places. [2024-11-13 15:34:29,255 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 60 transitions, 193 flow [2024-11-13 15:34:29,256 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) [2024-11-13 15:34:29,256 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 15:34:29,256 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:34:29,256 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-13 15:34:29,256 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-13 15:34:29,256 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:34:29,256 INFO L85 PathProgramCache]: Analyzing trace with hash -965480564, now seen corresponding path program 1 times [2024-11-13 15:34:29,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:34:29,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528622783] [2024-11-13 15:34:29,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:34:29,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:34:29,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:34:29,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:34:29,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:34:29,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528622783] [2024-11-13 15:34:29,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528622783] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:34:29,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:34:29,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 15:34:29,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719387620] [2024-11-13 15:34:29,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:34:29,362 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 15:34:29,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:34:29,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 15:34:29,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 15:34:29,381 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 66 [2024-11-13 15:34:29,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 60 transitions, 193 flow. Second operand has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:34:29,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 15:34:29,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 66 [2024-11-13 15:34:29,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 15:34:30,068 INFO L124 PetriNetUnfolderBase]: 3670/5898 cut-off events. [2024-11-13 15:34:30,069 INFO L125 PetriNetUnfolderBase]: For 683/683 co-relation queries the response was YES. [2024-11-13 15:34:30,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11678 conditions, 5898 events. 3670/5898 cut-off events. For 683/683 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 41162 event pairs, 2627 based on Foata normal form. 128/4925 useless extension candidates. Maximal degree in co-relation 9111. Up to 4096 conditions per place. [2024-11-13 15:34:30,100 INFO L140 encePairwiseOnDemand]: 59/66 looper letters, 56 selfloop transitions, 7 changer transitions 0/80 dead transitions. [2024-11-13 15:34:30,100 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 80 transitions, 371 flow [2024-11-13 15:34:30,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 15:34:30,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-13 15:34:30,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 163 transitions. [2024-11-13 15:34:30,102 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6174242424242424 [2024-11-13 15:34:30,102 INFO L175 Difference]: Start difference. First operand has 66 places, 60 transitions, 193 flow. Second operand 4 states and 163 transitions. [2024-11-13 15:34:30,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 80 transitions, 371 flow [2024-11-13 15:34:30,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 80 transitions, 366 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-13 15:34:30,105 INFO L231 Difference]: Finished difference. Result has 68 places, 60 transitions, 212 flow [2024-11-13 15:34:30,105 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=212, PETRI_PLACES=68, PETRI_TRANSITIONS=60} [2024-11-13 15:34:30,106 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, 0 predicate places. [2024-11-13 15:34:30,106 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 60 transitions, 212 flow [2024-11-13 15:34:30,106 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:34:30,106 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 15:34:30,106 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:34:30,106 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-13 15:34:30,106 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-13 15:34:30,107 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:34:30,107 INFO L85 PathProgramCache]: Analyzing trace with hash -889494, now seen corresponding path program 1 times [2024-11-13 15:34:30,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:34:30,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822739866] [2024-11-13 15:34:30,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:34:30,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:34:30,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:34:30,392 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:34:30,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:34:30,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822739866] [2024-11-13 15:34:30,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822739866] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:34:30,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746181777] [2024-11-13 15:34:30,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:34:30,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:34:30,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9bc070-51d1-4496-b831-70105f5203b8/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:34:30,396 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9bc070-51d1-4496-b831-70105f5203b8/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:34:30,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9bc070-51d1-4496-b831-70105f5203b8/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-13 15:34:30,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:34:30,514 INFO L255 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-13 15:34:30,517 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:34:30,647 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:34:30,647 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 15:34:30,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746181777] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:34:30,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-13 15:34:30,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2024-11-13 15:34:30,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050745132] [2024-11-13 15:34:30,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:34:30,648 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 15:34:30,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:34:30,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 15:34:30,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-11-13 15:34:30,677 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 66 [2024-11-13 15:34:30,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 60 transitions, 212 flow. Second operand has 5 states, 5 states have (on average 27.8) internal successors, (139), 5 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:34:30,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 15:34:30,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 66 [2024-11-13 15:34:30,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 15:34:31,188 INFO L124 PetriNetUnfolderBase]: 2430/4119 cut-off events. [2024-11-13 15:34:31,188 INFO L125 PetriNetUnfolderBase]: For 957/957 co-relation queries the response was YES. [2024-11-13 15:34:31,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8580 conditions, 4119 events. 2430/4119 cut-off events. For 957/957 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 28780 event pairs, 1773 based on Foata normal form. 0/3606 useless extension candidates. Maximal degree in co-relation 6637. Up to 3292 conditions per place. [2024-11-13 15:34:31,217 INFO L140 encePairwiseOnDemand]: 62/66 looper letters, 35 selfloop transitions, 6 changer transitions 0/58 dead transitions. [2024-11-13 15:34:31,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 58 transitions, 286 flow [2024-11-13 15:34:31,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 15:34:31,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-13 15:34:31,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 136 transitions. [2024-11-13 15:34:31,219 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5151515151515151 [2024-11-13 15:34:31,219 INFO L175 Difference]: Start difference. First operand has 68 places, 60 transitions, 212 flow. Second operand 4 states and 136 transitions. [2024-11-13 15:34:31,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 58 transitions, 286 flow [2024-11-13 15:34:31,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 58 transitions, 281 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-13 15:34:31,223 INFO L231 Difference]: Finished difference. Result has 68 places, 58 transitions, 211 flow [2024-11-13 15:34:31,224 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=199, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=211, PETRI_PLACES=68, PETRI_TRANSITIONS=58} [2024-11-13 15:34:31,226 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, 0 predicate places. [2024-11-13 15:34:31,226 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 58 transitions, 211 flow [2024-11-13 15:34:31,227 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.8) internal successors, (139), 5 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:34:31,227 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 15:34:31,227 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:34:31,252 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9bc070-51d1-4496-b831-70105f5203b8/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-13 15:34:31,432 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9bc070-51d1-4496-b831-70105f5203b8/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-13 15:34:31,432 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-13 15:34:31,432 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:34:31,432 INFO L85 PathProgramCache]: Analyzing trace with hash 2103559998, now seen corresponding path program 1 times [2024-11-13 15:34:31,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:34:31,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039285745] [2024-11-13 15:34:31,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:34:31,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:34:31,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:34:31,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:34:31,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:34:31,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039285745] [2024-11-13 15:34:31,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039285745] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:34:31,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:34:31,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-13 15:34:31,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936312128] [2024-11-13 15:34:31,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:34:31,491 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 15:34:31,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:34:31,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 15:34:31,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 15:34:31,492 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 66 [2024-11-13 15:34:31,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 58 transitions, 211 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) [2024-11-13 15:34:31,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 15:34:31,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 66 [2024-11-13 15:34:31,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 15:34:32,200 INFO L124 PetriNetUnfolderBase]: 3678/6027 cut-off events. [2024-11-13 15:34:32,201 INFO L125 PetriNetUnfolderBase]: For 1502/1502 co-relation queries the response was YES. [2024-11-13 15:34:32,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12670 conditions, 6027 events. 3678/6027 cut-off events. For 1502/1502 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 40678 event pairs, 1008 based on Foata normal form. 4/5637 useless extension candidates. Maximal degree in co-relation 10203. Up to 2879 conditions per place. [2024-11-13 15:34:32,235 INFO L140 encePairwiseOnDemand]: 62/66 looper letters, 53 selfloop transitions, 3 changer transitions 2/75 dead transitions. [2024-11-13 15:34:32,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 75 transitions, 374 flow [2024-11-13 15:34:32,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 15:34:32,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-13 15:34:32,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 126 transitions. [2024-11-13 15:34:32,237 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6363636363636364 [2024-11-13 15:34:32,237 INFO L175 Difference]: Start difference. First operand has 68 places, 58 transitions, 211 flow. Second operand 3 states and 126 transitions. [2024-11-13 15:34:32,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 75 transitions, 374 flow [2024-11-13 15:34:32,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 75 transitions, 365 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-13 15:34:32,239 INFO L231 Difference]: Finished difference. Result has 69 places, 59 transitions, 211 flow [2024-11-13 15:34:32,239 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=211, PETRI_PLACES=69, PETRI_TRANSITIONS=59} [2024-11-13 15:34:32,240 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, 1 predicate places. [2024-11-13 15:34:32,240 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 59 transitions, 211 flow [2024-11-13 15:34:32,240 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) [2024-11-13 15:34:32,240 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 15:34:32,240 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:34:32,240 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-13 15:34:32,240 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-13 15:34:32,241 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:34:32,241 INFO L85 PathProgramCache]: Analyzing trace with hash 2076211772, now seen corresponding path program 1 times [2024-11-13 15:34:32,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:34:32,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057163133] [2024-11-13 15:34:32,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:34:32,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:34:32,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:34:32,338 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 15:34:32,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:34:32,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057163133] [2024-11-13 15:34:32,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057163133] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:34:32,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:34:32,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-13 15:34:32,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693108737] [2024-11-13 15:34:32,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:34:32,340 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 15:34:32,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:34:32,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 15:34:32,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 15:34:32,345 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 66 [2024-11-13 15:34:32,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 59 transitions, 211 flow. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:34:32,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 15:34:32,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 66 [2024-11-13 15:34:32,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 15:34:32,922 INFO L124 PetriNetUnfolderBase]: 3843/6166 cut-off events. [2024-11-13 15:34:32,922 INFO L125 PetriNetUnfolderBase]: For 3335/3335 co-relation queries the response was YES. [2024-11-13 15:34:32,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14142 conditions, 6166 events. 3843/6166 cut-off events. For 3335/3335 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 41712 event pairs, 1389 based on Foata normal form. 146/5909 useless extension candidates. Maximal degree in co-relation 11995. Up to 2974 conditions per place. [2024-11-13 15:34:32,952 INFO L140 encePairwiseOnDemand]: 63/66 looper letters, 62 selfloop transitions, 2 changer transitions 0/81 dead transitions. [2024-11-13 15:34:32,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 81 transitions, 405 flow [2024-11-13 15:34:32,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 15:34:32,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-13 15:34:32,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 130 transitions. [2024-11-13 15:34:32,954 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6565656565656566 [2024-11-13 15:34:32,954 INFO L175 Difference]: Start difference. First operand has 69 places, 59 transitions, 211 flow. Second operand 3 states and 130 transitions. [2024-11-13 15:34:32,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 81 transitions, 405 flow [2024-11-13 15:34:32,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 81 transitions, 401 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-13 15:34:32,957 INFO L231 Difference]: Finished difference. Result has 71 places, 60 transitions, 222 flow [2024-11-13 15:34:32,958 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=222, PETRI_PLACES=71, PETRI_TRANSITIONS=60} [2024-11-13 15:34:32,958 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, 3 predicate places. [2024-11-13 15:34:32,958 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 60 transitions, 222 flow [2024-11-13 15:34:32,959 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:34:32,959 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 15:34:32,959 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:34:32,959 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-13 15:34:32,959 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-13 15:34:32,959 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:34:32,959 INFO L85 PathProgramCache]: Analyzing trace with hash 751311020, now seen corresponding path program 1 times [2024-11-13 15:34:32,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:34:32,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230337703] [2024-11-13 15:34:32,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:34:32,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:34:32,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:34:33,054 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 15:34:33,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:34:33,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230337703] [2024-11-13 15:34:33,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230337703] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:34:33,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:34:33,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-13 15:34:33,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357131716] [2024-11-13 15:34:33,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:34:33,055 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 15:34:33,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:34:33,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 15:34:33,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 15:34:33,061 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 66 [2024-11-13 15:34:33,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 60 transitions, 222 flow. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:34:33,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 15:34:33,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 66 [2024-11-13 15:34:33,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 15:34:33,850 INFO L124 PetriNetUnfolderBase]: 4170/6921 cut-off events. [2024-11-13 15:34:33,850 INFO L125 PetriNetUnfolderBase]: For 4717/4767 co-relation queries the response was YES. [2024-11-13 15:34:33,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16130 conditions, 6921 events. 4170/6921 cut-off events. For 4717/4767 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 49157 event pairs, 1683 based on Foata normal form. 90/6702 useless extension candidates. Maximal degree in co-relation 13920. Up to 3185 conditions per place. [2024-11-13 15:34:33,874 INFO L140 encePairwiseOnDemand]: 63/66 looper letters, 62 selfloop transitions, 2 changer transitions 0/81 dead transitions. [2024-11-13 15:34:33,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 81 transitions, 421 flow [2024-11-13 15:34:33,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 15:34:33,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-13 15:34:33,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 128 transitions. [2024-11-13 15:34:33,875 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6464646464646465 [2024-11-13 15:34:33,875 INFO L175 Difference]: Start difference. First operand has 71 places, 60 transitions, 222 flow. Second operand 3 states and 128 transitions. [2024-11-13 15:34:33,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 81 transitions, 421 flow [2024-11-13 15:34:33,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 81 transitions, 418 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-13 15:34:33,878 INFO L231 Difference]: Finished difference. Result has 73 places, 61 transitions, 234 flow [2024-11-13 15:34:33,878 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=234, PETRI_PLACES=73, PETRI_TRANSITIONS=61} [2024-11-13 15:34:33,878 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, 5 predicate places. [2024-11-13 15:34:33,878 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 61 transitions, 234 flow [2024-11-13 15:34:33,879 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:34:33,879 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 15:34:33,881 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:34:33,881 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-13 15:34:33,881 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-13 15:34:33,881 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:34:33,881 INFO L85 PathProgramCache]: Analyzing trace with hash 284185691, now seen corresponding path program 1 times [2024-11-13 15:34:33,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:34:33,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480994860] [2024-11-13 15:34:33,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:34:33,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:34:33,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:34:34,377 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-13 15:34:34,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:34:34,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480994860] [2024-11-13 15:34:34,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480994860] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:34:34,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:34:34,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-13 15:34:34,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337181529] [2024-11-13 15:34:34,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:34:34,378 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-13 15:34:34,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:34:34,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-13 15:34:34,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-13 15:34:34,466 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 66 [2024-11-13 15:34:34,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 61 transitions, 234 flow. Second operand has 6 states, 6 states have (on average 24.833333333333332) internal successors, (149), 6 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:34:34,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 15:34:34,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 66 [2024-11-13 15:34:34,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 15:34:36,372 INFO L124 PetriNetUnfolderBase]: 12223/17959 cut-off events. [2024-11-13 15:34:36,372 INFO L125 PetriNetUnfolderBase]: For 12323/12399 co-relation queries the response was YES. [2024-11-13 15:34:36,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44345 conditions, 17959 events. 12223/17959 cut-off events. For 12323/12399 co-relation queries the response was YES. Maximal size of possible extension queue 895. Compared 118420 event pairs, 1759 based on Foata normal form. 4/16143 useless extension candidates. Maximal degree in co-relation 37090. Up to 10053 conditions per place. [2024-11-13 15:34:36,460 INFO L140 encePairwiseOnDemand]: 59/66 looper letters, 119 selfloop transitions, 5 changer transitions 3/138 dead transitions. [2024-11-13 15:34:36,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 138 transitions, 736 flow [2024-11-13 15:34:36,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 15:34:36,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-13 15:34:36,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 227 transitions. [2024-11-13 15:34:36,463 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5732323232323232 [2024-11-13 15:34:36,463 INFO L175 Difference]: Start difference. First operand has 73 places, 61 transitions, 234 flow. Second operand 6 states and 227 transitions. [2024-11-13 15:34:36,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 138 transitions, 736 flow [2024-11-13 15:34:36,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 138 transitions, 731 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-13 15:34:36,472 INFO L231 Difference]: Finished difference. Result has 80 places, 64 transitions, 266 flow [2024-11-13 15:34:36,472 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=266, PETRI_PLACES=80, PETRI_TRANSITIONS=64} [2024-11-13 15:34:36,473 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, 12 predicate places. [2024-11-13 15:34:36,473 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 64 transitions, 266 flow [2024-11-13 15:34:36,473 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 24.833333333333332) internal successors, (149), 6 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:34:36,473 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 15:34:36,474 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:34:36,474 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-13 15:34:36,474 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-13 15:34:36,475 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:34:36,475 INFO L85 PathProgramCache]: Analyzing trace with hash -1004236139, now seen corresponding path program 2 times [2024-11-13 15:34:36,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:34:36,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352648728] [2024-11-13 15:34:36,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:34:36,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:34:36,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:34:37,016 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 15:34:37,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:34:37,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352648728] [2024-11-13 15:34:37,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352648728] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:34:37,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831339700] [2024-11-13 15:34:37,017 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 15:34:37,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:34:37,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9bc070-51d1-4496-b831-70105f5203b8/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:34:37,019 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9bc070-51d1-4496-b831-70105f5203b8/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:34:37,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9bc070-51d1-4496-b831-70105f5203b8/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-13 15:34:37,187 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 15:34:37,188 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 15:34:37,190 INFO L255 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-13 15:34:37,193 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:34:37,819 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 15:34:37,819 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:34:38,394 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 15:34:38,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831339700] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:34:38,395 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:34:38,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 10, 10] total 23 [2024-11-13 15:34:38,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101394087] [2024-11-13 15:34:38,395 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:34:38,396 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-13 15:34:38,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:34:38,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-13 15:34:38,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2024-11-13 15:34:38,495 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 66 [2024-11-13 15:34:38,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 64 transitions, 266 flow. Second operand has 24 states, 24 states have (on average 18.708333333333332) internal successors, (449), 24 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:34:38,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 15:34:38,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 66 [2024-11-13 15:34:38,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 15:35:05,293 INFO L124 PetriNetUnfolderBase]: 84274/117628 cut-off events. [2024-11-13 15:35:05,294 INFO L125 PetriNetUnfolderBase]: For 94353/94353 co-relation queries the response was YES. [2024-11-13 15:35:05,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 307342 conditions, 117628 events. 84274/117628 cut-off events. For 94353/94353 co-relation queries the response was YES. Maximal size of possible extension queue 3614. Compared 830391 event pairs, 4066 based on Foata normal form. 8085/119282 useless extension candidates. Maximal degree in co-relation 238303. Up to 14553 conditions per place. [2024-11-13 15:35:05,975 INFO L140 encePairwiseOnDemand]: 46/66 looper letters, 1222 selfloop transitions, 774 changer transitions 97/2099 dead transitions. [2024-11-13 15:35:05,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 2099 transitions, 11631 flow [2024-11-13 15:35:05,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 177 states. [2024-11-13 15:35:05,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2024-11-13 15:35:05,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 4767 transitions. [2024-11-13 15:35:05,993 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4080636877247047 [2024-11-13 15:35:05,993 INFO L175 Difference]: Start difference. First operand has 80 places, 64 transitions, 266 flow. Second operand 177 states and 4767 transitions. [2024-11-13 15:35:05,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 2099 transitions, 11631 flow [2024-11-13 15:35:06,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 2099 transitions, 11493 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-13 15:35:06,085 INFO L231 Difference]: Finished difference. Result has 418 places, 1036 transitions, 7873 flow [2024-11-13 15:35:06,086 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=177, PETRI_FLOW=7873, PETRI_PLACES=418, PETRI_TRANSITIONS=1036} [2024-11-13 15:35:06,086 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, 350 predicate places. [2024-11-13 15:35:06,086 INFO L471 AbstractCegarLoop]: Abstraction has has 418 places, 1036 transitions, 7873 flow [2024-11-13 15:35:06,087 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 18.708333333333332) internal successors, (449), 24 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:35:06,087 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 15:35:06,087 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:35:06,111 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9bc070-51d1-4496-b831-70105f5203b8/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-13 15:35:06,291 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9bc070-51d1-4496-b831-70105f5203b8/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-13 15:35:06,291 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-13 15:35:06,291 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:35:06,291 INFO L85 PathProgramCache]: Analyzing trace with hash -1603510485, now seen corresponding path program 3 times [2024-11-13 15:35:06,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:35:06,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420809915] [2024-11-13 15:35:06,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:35:06,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:35:06,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:35:06,686 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-13 15:35:06,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:35:06,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420809915] [2024-11-13 15:35:06,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420809915] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:35:06,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:35:06,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-13 15:35:06,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938609784] [2024-11-13 15:35:06,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:35:06,687 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-13 15:35:06,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:35:06,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-13 15:35:06,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-13 15:35:06,740 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 66 [2024-11-13 15:35:06,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 1036 transitions, 7873 flow. Second operand has 6 states, 6 states have (on average 25.833333333333332) internal successors, (155), 6 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:35:06,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 15:35:06,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 66 [2024-11-13 15:35:06,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand