./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/chl-chromosome-opt-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 6497de01 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_652d6fc4-1d4b-4f10-9d18-a2f55a47e55a/bin/uautomizer-verify-LYvppIcaGC/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_652d6fc4-1d4b-4f10-9d18-a2f55a47e55a/bin/uautomizer-verify-LYvppIcaGC/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_652d6fc4-1d4b-4f10-9d18-a2f55a47e55a/bin/uautomizer-verify-LYvppIcaGC/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_652d6fc4-1d4b-4f10-9d18-a2f55a47e55a/bin/uautomizer-verify-LYvppIcaGC/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-chromosome-opt-symm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_652d6fc4-1d4b-4f10-9d18-a2f55a47e55a/bin/uautomizer-verify-LYvppIcaGC/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_652d6fc4-1d4b-4f10-9d18-a2f55a47e55a/bin/uautomizer-verify-LYvppIcaGC --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b034d85232772d264d33ccb960d3ce3e7bf57df858fd0c6fd0b22127388c3f9a --- Real Ultimate output --- This is Ultimate 0.3.0-dev-6497de0 [2024-11-24 01:33:40,627 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-24 01:33:40,706 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_652d6fc4-1d4b-4f10-9d18-a2f55a47e55a/bin/uautomizer-verify-LYvppIcaGC/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-24 01:33:40,714 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-24 01:33:40,714 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-24 01:33:40,755 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-24 01:33:40,756 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-24 01:33:40,757 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-24 01:33:40,757 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-24 01:33:40,757 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-24 01:33:40,758 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-24 01:33:40,758 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-24 01:33:40,759 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-24 01:33:40,759 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-24 01:33:40,759 INFO L153 SettingsManager]: * Use SBE=true [2024-11-24 01:33:40,760 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-24 01:33:40,760 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-24 01:33:40,760 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-24 01:33:40,760 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-24 01:33:40,760 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-24 01:33:40,761 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-24 01:33:40,761 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-24 01:33:40,761 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-24 01:33:40,761 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-24 01:33:40,761 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-24 01:33:40,761 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-24 01:33:40,761 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-24 01:33:40,761 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-24 01:33:40,762 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-24 01:33:40,762 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-24 01:33:40,762 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-24 01:33:40,762 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-24 01:33:40,763 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-24 01:33:40,763 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-24 01:33:40,763 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-24 01:33:40,763 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-24 01:33:40,763 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-24 01:33:40,764 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-24 01:33:40,764 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-24 01:33:40,764 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-24 01:33:40,764 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-24 01:33:40,764 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-24 01:33:40,764 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-24 01:33:40,764 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-24 01:33:40,764 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-24 01:33:40,765 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-24 01:33:40,765 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-24 01:33:40,765 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_652d6fc4-1d4b-4f10-9d18-a2f55a47e55a/bin/uautomizer-verify-LYvppIcaGC Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b034d85232772d264d33ccb960d3ce3e7bf57df858fd0c6fd0b22127388c3f9a [2024-11-24 01:33:41,043 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-24 01:33:41,052 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-24 01:33:41,054 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-24 01:33:41,055 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-24 01:33:41,055 INFO L274 PluginConnector]: CDTParser initialized [2024-11-24 01:33:41,057 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_652d6fc4-1d4b-4f10-9d18-a2f55a47e55a/bin/uautomizer-verify-LYvppIcaGC/../../sv-benchmarks/c/weaver/chl-chromosome-opt-symm.wvr.c [2024-11-24 01:33:43,903 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_652d6fc4-1d4b-4f10-9d18-a2f55a47e55a/bin/uautomizer-verify-LYvppIcaGC/data/2156cac6e/1f7f474cf0f24b0ea30a3257e160cc21/FLAG7c8d8e68b [2024-11-24 01:33:44,159 INFO L384 CDTParser]: Found 1 translation units. [2024-11-24 01:33:44,161 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_652d6fc4-1d4b-4f10-9d18-a2f55a47e55a/sv-benchmarks/c/weaver/chl-chromosome-opt-symm.wvr.c [2024-11-24 01:33:44,175 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_652d6fc4-1d4b-4f10-9d18-a2f55a47e55a/bin/uautomizer-verify-LYvppIcaGC/data/2156cac6e/1f7f474cf0f24b0ea30a3257e160cc21/FLAG7c8d8e68b [2024-11-24 01:33:44,199 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_652d6fc4-1d4b-4f10-9d18-a2f55a47e55a/bin/uautomizer-verify-LYvppIcaGC/data/2156cac6e/1f7f474cf0f24b0ea30a3257e160cc21 [2024-11-24 01:33:44,202 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-24 01:33:44,204 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-24 01:33:44,206 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-24 01:33:44,206 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-24 01:33:44,211 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-24 01:33:44,212 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 01:33:44" (1/1) ... [2024-11-24 01:33:44,215 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@100307e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:33:44, skipping insertion in model container [2024-11-24 01:33:44,215 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 01:33:44" (1/1) ... [2024-11-24 01:33:44,235 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-24 01:33:44,452 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-24 01:33:44,459 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-24 01:33:44,473 INFO L200 MainTranslator]: Completed pre-run [2024-11-24 01:33:44,511 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-24 01:33:44,528 INFO L204 MainTranslator]: Completed translation [2024-11-24 01:33:44,529 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:33:44 WrapperNode [2024-11-24 01:33:44,529 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-24 01:33:44,530 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-24 01:33:44,530 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-24 01:33:44,530 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-24 01:33:44,538 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:33:44" (1/1) ... [2024-11-24 01:33:44,545 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:33:44" (1/1) ... [2024-11-24 01:33:44,576 INFO L138 Inliner]: procedures = 23, calls = 26, calls flagged for inlining = 10, calls inlined = 12, statements flattened = 167 [2024-11-24 01:33:44,579 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-24 01:33:44,579 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-24 01:33:44,579 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-24 01:33:44,579 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-24 01:33:44,589 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:33:44" (1/1) ... [2024-11-24 01:33:44,590 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:33:44" (1/1) ... [2024-11-24 01:33:44,596 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:33:44" (1/1) ... [2024-11-24 01:33:44,627 INFO L175 MemorySlicer]: Split 12 memory accesses to 2 slices as follows [2, 10]. 83 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-11-24 01:33:44,631 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:33:44" (1/1) ... [2024-11-24 01:33:44,631 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:33:44" (1/1) ... [2024-11-24 01:33:44,641 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:33:44" (1/1) ... [2024-11-24 01:33:44,645 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:33:44" (1/1) ... [2024-11-24 01:33:44,649 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:33:44" (1/1) ... [2024-11-24 01:33:44,656 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:33:44" (1/1) ... [2024-11-24 01:33:44,657 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:33:44" (1/1) ... [2024-11-24 01:33:44,659 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-24 01:33:44,663 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-24 01:33:44,664 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-24 01:33:44,664 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-24 01:33:44,664 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:33:44" (1/1) ... [2024-11-24 01:33:44,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-24 01:33:44,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_652d6fc4-1d4b-4f10-9d18-a2f55a47e55a/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:33:44,703 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_652d6fc4-1d4b-4f10-9d18-a2f55a47e55a/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-24 01:33:44,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_652d6fc4-1d4b-4f10-9d18-a2f55a47e55a/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-24 01:33:44,731 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-24 01:33:44,731 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-24 01:33:44,732 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-24 01:33:44,732 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-24 01:33:44,732 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-24 01:33:44,732 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-24 01:33:44,732 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-24 01:33:44,732 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-24 01:33:44,732 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-24 01:33:44,732 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-24 01:33:44,733 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-24 01:33:44,733 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-24 01:33:44,733 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-24 01:33:44,733 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-24 01:33:44,735 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-24 01:33:44,870 INFO L234 CfgBuilder]: Building ICFG [2024-11-24 01:33:44,872 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-24 01:33:45,337 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-24 01:33:45,337 INFO L283 CfgBuilder]: Performing block encoding [2024-11-24 01:33:45,585 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-24 01:33:45,587 INFO L312 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-24 01:33:45,587 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 01:33:45 BoogieIcfgContainer [2024-11-24 01:33:45,587 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-24 01:33:45,589 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-24 01:33:45,590 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-24 01:33:45,599 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-24 01:33:45,599 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 01:33:44" (1/3) ... [2024-11-24 01:33:45,600 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48905aee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 01:33:45, skipping insertion in model container [2024-11-24 01:33:45,600 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:33:44" (2/3) ... [2024-11-24 01:33:45,600 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48905aee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 01:33:45, skipping insertion in model container [2024-11-24 01:33:45,600 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 01:33:45" (3/3) ... [2024-11-24 01:33:45,601 INFO L128 eAbstractionObserver]: Analyzing ICFG chl-chromosome-opt-symm.wvr.c [2024-11-24 01:33:45,618 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-24 01:33:45,620 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG chl-chromosome-opt-symm.wvr.c that has 3 procedures, 59 locations, 1 initial locations, 4 loop locations, and 22 error locations. [2024-11-24 01:33:45,620 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-24 01:33:45,719 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-24 01:33:45,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 65 places, 66 transitions, 146 flow [2024-11-24 01:33:45,813 INFO L124 PetriNetUnfolderBase]: 8/64 cut-off events. [2024-11-24 01:33:45,818 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-24 01:33:45,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73 conditions, 64 events. 8/64 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 198 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 47. Up to 2 conditions per place. [2024-11-24 01:33:45,824 INFO L82 GeneralOperation]: Start removeDead. Operand has 65 places, 66 transitions, 146 flow [2024-11-24 01:33:45,829 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 62 places, 63 transitions, 138 flow [2024-11-24 01:33:45,839 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-24 01:33:45,858 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;@48fe7c57, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-24 01:33:45,858 INFO L334 AbstractCegarLoop]: Starting to check reachability of 40 error locations. [2024-11-24 01:33:45,863 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-24 01:33:45,864 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-24 01:33:45,864 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-24 01:33:45,864 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:33:45,865 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-24 01:33:45,865 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-24 01:33:45,870 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:33:45,871 INFO L85 PathProgramCache]: Analyzing trace with hash 535295, now seen corresponding path program 1 times [2024-11-24 01:33:45,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:33:45,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429846629] [2024-11-24 01:33:45,879 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:33:45,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:33:45,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:33:46,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:33:46,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:33:46,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429846629] [2024-11-24 01:33:46,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429846629] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 01:33:46,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 01:33:46,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-24 01:33:46,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73064624] [2024-11-24 01:33:46,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:33:46,152 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-24 01:33:46,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:33:46,183 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-24 01:33:46,184 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-24 01:33:46,248 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 66 [2024-11-24 01:33:46,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 63 transitions, 138 flow. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 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) [2024-11-24 01:33:46,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:33:46,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 66 [2024-11-24 01:33:46,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:33:46,481 INFO L124 PetriNetUnfolderBase]: 183/426 cut-off events. [2024-11-24 01:33:46,482 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2024-11-24 01:33:46,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 731 conditions, 426 events. 183/426 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2151 event pairs, 100 based on Foata normal form. 1/303 useless extension candidates. Maximal degree in co-relation 667. Up to 275 conditions per place. [2024-11-24 01:33:46,491 INFO L140 encePairwiseOnDemand]: 61/66 looper letters, 28 selfloop transitions, 2 changer transitions 0/59 dead transitions. [2024-11-24 01:33:46,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 59 transitions, 190 flow [2024-11-24 01:33:46,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-24 01:33:46,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-24 01:33:46,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 129 transitions. [2024-11-24 01:33:46,507 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6515151515151515 [2024-11-24 01:33:46,510 INFO L175 Difference]: Start difference. First operand has 62 places, 63 transitions, 138 flow. Second operand 3 states and 129 transitions. [2024-11-24 01:33:46,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 59 transitions, 190 flow [2024-11-24 01:33:46,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 59 transitions, 182 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-24 01:33:46,521 INFO L231 Difference]: Finished difference. Result has 56 places, 59 transitions, 126 flow [2024-11-24 01:33:46,524 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=126, PETRI_PLACES=56, PETRI_TRANSITIONS=59} [2024-11-24 01:33:46,528 INFO L279 CegarLoopForPetriNet]: 62 programPoint places, -6 predicate places. [2024-11-24 01:33:46,529 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 59 transitions, 126 flow [2024-11-24 01:33:46,529 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 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) [2024-11-24 01:33:46,529 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:33:46,529 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-24 01:33:46,529 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-24 01:33:46,529 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-24 01:33:46,533 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:33:46,533 INFO L85 PathProgramCache]: Analyzing trace with hash 535296, now seen corresponding path program 1 times [2024-11-24 01:33:46,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:33:46,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714440021] [2024-11-24 01:33:46,534 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:33:46,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:33:46,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:33:46,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:33:46,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:33:46,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714440021] [2024-11-24 01:33:46,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714440021] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 01:33:46,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 01:33:46,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-24 01:33:46,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572413423] [2024-11-24 01:33:46,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:33:46,885 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-24 01:33:46,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:33:46,885 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-24 01:33:46,885 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-24 01:33:46,979 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 66 [2024-11-24 01:33:46,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 59 transitions, 126 flow. Second operand has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:33:46,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:33:46,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 66 [2024-11-24 01:33:46,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:33:47,155 INFO L124 PetriNetUnfolderBase]: 183/430 cut-off events. [2024-11-24 01:33:47,155 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-11-24 01:33:47,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 728 conditions, 430 events. 183/430 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2161 event pairs, 100 based on Foata normal form. 1/306 useless extension candidates. Maximal degree in co-relation 697. Up to 283 conditions per place. [2024-11-24 01:33:47,161 INFO L140 encePairwiseOnDemand]: 59/66 looper letters, 32 selfloop transitions, 4 changer transitions 0/63 dead transitions. [2024-11-24 01:33:47,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 63 transitions, 206 flow [2024-11-24 01:33:47,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-24 01:33:47,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-24 01:33:47,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 136 transitions. [2024-11-24 01:33:47,164 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6868686868686869 [2024-11-24 01:33:47,164 INFO L175 Difference]: Start difference. First operand has 56 places, 59 transitions, 126 flow. Second operand 3 states and 136 transitions. [2024-11-24 01:33:47,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 63 transitions, 206 flow [2024-11-24 01:33:47,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 63 transitions, 202 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-24 01:33:47,168 INFO L231 Difference]: Finished difference. Result has 57 places, 61 transitions, 148 flow [2024-11-24 01:33:47,168 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=148, PETRI_PLACES=57, PETRI_TRANSITIONS=61} [2024-11-24 01:33:47,170 INFO L279 CegarLoopForPetriNet]: 62 programPoint places, -5 predicate places. [2024-11-24 01:33:47,170 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 61 transitions, 148 flow [2024-11-24 01:33:47,170 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:33:47,170 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:33:47,170 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-24 01:33:47,170 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-24 01:33:47,171 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-24 01:33:47,172 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:33:47,172 INFO L85 PathProgramCache]: Analyzing trace with hash 514436773, now seen corresponding path program 1 times [2024-11-24 01:33:47,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:33:47,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750388053] [2024-11-24 01:33:47,174 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:33:47,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:33:47,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:33:47,564 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:33:47,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:33:47,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750388053] [2024-11-24 01:33:47,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750388053] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:33:47,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778194135] [2024-11-24 01:33:47,565 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:33:47,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:33:47,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_652d6fc4-1d4b-4f10-9d18-a2f55a47e55a/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:33:47,570 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_652d6fc4-1d4b-4f10-9d18-a2f55a47e55a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:33:47,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_652d6fc4-1d4b-4f10-9d18-a2f55a47e55a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-24 01:33:47,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:33:47,651 INFO L256 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-24 01:33:47,655 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:33:47,713 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 [2024-11-24 01:33:47,795 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:33:47,795 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:33:47,901 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:33:47,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778194135] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:33:47,901 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:33:47,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2024-11-24 01:33:47,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844147554] [2024-11-24 01:33:47,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:33:47,902 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-24 01:33:47,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:33:47,902 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-24 01:33:47,903 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-11-24 01:33:48,215 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 66 [2024-11-24 01:33:48,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 61 transitions, 148 flow. Second operand has 9 states, 9 states have (on average 33.666666666666664) internal successors, (303), 9 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:33:48,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:33:48,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 66 [2024-11-24 01:33:48,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:33:48,577 INFO L124 PetriNetUnfolderBase]: 187/446 cut-off events. [2024-11-24 01:33:48,577 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-11-24 01:33:48,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 780 conditions, 446 events. 187/446 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2194 event pairs, 100 based on Foata normal form. 2/324 useless extension candidates. Maximal degree in co-relation 729. Up to 285 conditions per place. [2024-11-24 01:33:48,583 INFO L140 encePairwiseOnDemand]: 59/66 looper letters, 38 selfloop transitions, 14 changer transitions 0/79 dead transitions. [2024-11-24 01:33:48,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 79 transitions, 310 flow [2024-11-24 01:33:48,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-24 01:33:48,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-24 01:33:48,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 252 transitions. [2024-11-24 01:33:48,587 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6363636363636364 [2024-11-24 01:33:48,587 INFO L175 Difference]: Start difference. First operand has 57 places, 61 transitions, 148 flow. Second operand 6 states and 252 transitions. [2024-11-24 01:33:48,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 79 transitions, 310 flow [2024-11-24 01:33:48,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 79 transitions, 304 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-24 01:33:48,590 INFO L231 Difference]: Finished difference. Result has 64 places, 71 transitions, 246 flow [2024-11-24 01:33:48,592 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=246, PETRI_PLACES=64, PETRI_TRANSITIONS=71} [2024-11-24 01:33:48,593 INFO L279 CegarLoopForPetriNet]: 62 programPoint places, 2 predicate places. [2024-11-24 01:33:48,593 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 71 transitions, 246 flow [2024-11-24 01:33:48,594 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 33.666666666666664) internal successors, (303), 9 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:33:48,594 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:33:48,594 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2024-11-24 01:33:48,603 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_652d6fc4-1d4b-4f10-9d18-a2f55a47e55a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-24 01:33:48,794 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_652d6fc4-1d4b-4f10-9d18-a2f55a47e55a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:33:48,795 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-24 01:33:48,795 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:33:48,795 INFO L85 PathProgramCache]: Analyzing trace with hash 181238292, now seen corresponding path program 2 times [2024-11-24 01:33:48,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:33:48,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136465012] [2024-11-24 01:33:48,795 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 01:33:48,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:33:48,816 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 01:33:48,816 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:33:49,244 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:33:49,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:33:49,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136465012] [2024-11-24 01:33:49,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136465012] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:33:49,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253790362] [2024-11-24 01:33:49,245 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 01:33:49,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:33:49,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_652d6fc4-1d4b-4f10-9d18-a2f55a47e55a/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:33:49,247 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_652d6fc4-1d4b-4f10-9d18-a2f55a47e55a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:33:49,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_652d6fc4-1d4b-4f10-9d18-a2f55a47e55a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-24 01:33:49,324 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 01:33:49,324 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:33:49,325 INFO L256 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-24 01:33:49,327 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:33:49,336 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-24 01:33:49,521 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:33:49,521 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:33:49,712 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:33:49,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253790362] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:33:49,712 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:33:49,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 16 [2024-11-24 01:33:49,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729574168] [2024-11-24 01:33:49,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:33:49,713 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-24 01:33:49,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:33:49,714 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-24 01:33:49,714 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2024-11-24 01:33:50,592 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 66 [2024-11-24 01:33:50,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 71 transitions, 246 flow. Second operand has 18 states, 18 states have (on average 33.833333333333336) internal successors, (609), 18 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:33:50,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:33:50,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 66 [2024-11-24 01:33:50,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:33:51,142 INFO L124 PetriNetUnfolderBase]: 183/444 cut-off events. [2024-11-24 01:33:51,142 INFO L125 PetriNetUnfolderBase]: For 53/53 co-relation queries the response was YES. [2024-11-24 01:33:51,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 794 conditions, 444 events. 183/444 cut-off events. For 53/53 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2146 event pairs, 100 based on Foata normal form. 10/332 useless extension candidates. Maximal degree in co-relation 727. Up to 275 conditions per place. [2024-11-24 01:33:51,146 INFO L140 encePairwiseOnDemand]: 57/66 looper letters, 33 selfloop transitions, 17 changer transitions 0/77 dead transitions. [2024-11-24 01:33:51,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 77 transitions, 330 flow [2024-11-24 01:33:51,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-24 01:33:51,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-24 01:33:51,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 348 transitions. [2024-11-24 01:33:51,151 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5858585858585859 [2024-11-24 01:33:51,151 INFO L175 Difference]: Start difference. First operand has 64 places, 71 transitions, 246 flow. Second operand 9 states and 348 transitions. [2024-11-24 01:33:51,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 77 transitions, 330 flow [2024-11-24 01:33:51,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 77 transitions, 288 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-11-24 01:33:51,156 INFO L231 Difference]: Finished difference. Result has 66 places, 69 transitions, 218 flow [2024-11-24 01:33:51,157 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=218, PETRI_PLACES=66, PETRI_TRANSITIONS=69} [2024-11-24 01:33:51,158 INFO L279 CegarLoopForPetriNet]: 62 programPoint places, 4 predicate places. [2024-11-24 01:33:51,158 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 69 transitions, 218 flow [2024-11-24 01:33:51,158 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 33.833333333333336) internal successors, (609), 18 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:33:51,158 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:33:51,158 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:33:51,168 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_652d6fc4-1d4b-4f10-9d18-a2f55a47e55a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-24 01:33:51,363 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_652d6fc4-1d4b-4f10-9d18-a2f55a47e55a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:33:51,363 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-24 01:33:51,365 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:33:51,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1509112180, now seen corresponding path program 1 times [2024-11-24 01:33:51,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:33:51,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776888378] [2024-11-24 01:33:51,365 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:33:51,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:33:51,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:33:51,635 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-11-24 01:33:51,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:33:51,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776888378] [2024-11-24 01:33:51,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776888378] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 01:33:51,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 01:33:51,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-24 01:33:51,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113392105] [2024-11-24 01:33:51,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:33:51,639 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-24 01:33:51,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:33:51,639 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-24 01:33:51,639 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-24 01:33:51,733 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 66 [2024-11-24 01:33:51,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 69 transitions, 218 flow. Second operand has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:33:51,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:33:51,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 66 [2024-11-24 01:33:51,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:33:51,911 INFO L124 PetriNetUnfolderBase]: 260/572 cut-off events. [2024-11-24 01:33:51,911 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-11-24 01:33:51,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1054 conditions, 572 events. 260/572 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2907 event pairs, 159 based on Foata normal form. 0/470 useless extension candidates. Maximal degree in co-relation 949. Up to 396 conditions per place. [2024-11-24 01:33:51,915 INFO L140 encePairwiseOnDemand]: 59/66 looper letters, 42 selfloop transitions, 3 changer transitions 0/65 dead transitions. [2024-11-24 01:33:51,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 65 transitions, 300 flow [2024-11-24 01:33:51,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-24 01:33:51,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-24 01:33:51,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 162 transitions. [2024-11-24 01:33:51,917 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4909090909090909 [2024-11-24 01:33:51,917 INFO L175 Difference]: Start difference. First operand has 66 places, 69 transitions, 218 flow. Second operand 5 states and 162 transitions. [2024-11-24 01:33:51,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 65 transitions, 300 flow [2024-11-24 01:33:51,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 65 transitions, 268 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-11-24 01:33:51,922 INFO L231 Difference]: Finished difference. Result has 60 places, 65 transitions, 184 flow [2024-11-24 01:33:51,922 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=184, PETRI_PLACES=60, PETRI_TRANSITIONS=65} [2024-11-24 01:33:51,922 INFO L279 CegarLoopForPetriNet]: 62 programPoint places, -2 predicate places. [2024-11-24 01:33:51,925 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 65 transitions, 184 flow [2024-11-24 01:33:51,925 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:33:51,925 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:33:51,925 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:33:51,925 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-24 01:33:51,925 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-24 01:33:51,926 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:33:51,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1509112181, now seen corresponding path program 1 times [2024-11-24 01:33:51,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:33:51,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701611057] [2024-11-24 01:33:51,926 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:33:51,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:33:51,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:33:52,691 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-24 01:33:52,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:33:52,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701611057] [2024-11-24 01:33:52,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701611057] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:33:52,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838733756] [2024-11-24 01:33:52,691 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:33:52,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:33:52,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_652d6fc4-1d4b-4f10-9d18-a2f55a47e55a/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:33:52,696 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_652d6fc4-1d4b-4f10-9d18-a2f55a47e55a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:33:52,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_652d6fc4-1d4b-4f10-9d18-a2f55a47e55a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-24 01:33:52,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:33:52,821 INFO L256 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-24 01:33:52,824 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:33:52,844 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-24 01:33:52,848 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 [2024-11-24 01:33:53,000 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-24 01:33:53,003 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 [2024-11-24 01:33:53,023 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 14 treesize of output 9 [2024-11-24 01:33:53,514 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-24 01:33:53,515 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:33:54,095 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-24 01:33:54,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838733756] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-24 01:33:54,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-24 01:33:54,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8] total 24 [2024-11-24 01:33:54,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27132069] [2024-11-24 01:33:54,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:33:54,096 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-24 01:33:54,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:33:54,096 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-24 01:33:54,097 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=501, Unknown=0, NotChecked=0, Total=650 [2024-11-24 01:33:54,668 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 66 [2024-11-24 01:33:54,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 65 transitions, 184 flow. Second operand has 10 states, 10 states have (on average 31.8) internal successors, (318), 10 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:33:54,669 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:33:54,669 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 66 [2024-11-24 01:33:54,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:33:54,955 INFO L124 PetriNetUnfolderBase]: 335/697 cut-off events. [2024-11-24 01:33:54,955 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-24 01:33:54,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1291 conditions, 697 events. 335/697 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3356 event pairs, 97 based on Foata normal form. 0/550 useless extension candidates. Maximal degree in co-relation 1200. Up to 324 conditions per place. [2024-11-24 01:33:54,959 INFO L140 encePairwiseOnDemand]: 58/66 looper letters, 56 selfloop transitions, 6 changer transitions 0/81 dead transitions. [2024-11-24 01:33:54,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 81 transitions, 343 flow [2024-11-24 01:33:54,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-24 01:33:54,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-24 01:33:54,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 232 transitions. [2024-11-24 01:33:54,961 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5858585858585859 [2024-11-24 01:33:54,961 INFO L175 Difference]: Start difference. First operand has 60 places, 65 transitions, 184 flow. Second operand 6 states and 232 transitions. [2024-11-24 01:33:54,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 81 transitions, 343 flow [2024-11-24 01:33:54,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 81 transitions, 338 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-24 01:33:54,964 INFO L231 Difference]: Finished difference. Result has 63 places, 65 transitions, 202 flow [2024-11-24 01:33:54,964 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=177, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=202, PETRI_PLACES=63, PETRI_TRANSITIONS=65} [2024-11-24 01:33:54,965 INFO L279 CegarLoopForPetriNet]: 62 programPoint places, 1 predicate places. [2024-11-24 01:33:54,965 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 65 transitions, 202 flow [2024-11-24 01:33:54,965 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 31.8) internal successors, (318), 10 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:33:54,965 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:33:54,966 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:33:54,975 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_652d6fc4-1d4b-4f10-9d18-a2f55a47e55a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-24 01:33:55,166 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_652d6fc4-1d4b-4f10-9d18-a2f55a47e55a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-24 01:33:55,166 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-24 01:33:55,167 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:33:55,167 INFO L85 PathProgramCache]: Analyzing trace with hash -462162150, now seen corresponding path program 1 times [2024-11-24 01:33:55,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:33:55,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687988884] [2024-11-24 01:33:55,167 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:33:55,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:33:55,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:33:55,306 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-11-24 01:33:55,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:33:55,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687988884] [2024-11-24 01:33:55,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687988884] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 01:33:55,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 01:33:55,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-24 01:33:55,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752961516] [2024-11-24 01:33:55,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:33:55,308 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-24 01:33:55,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:33:55,308 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-24 01:33:55,308 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-24 01:33:55,352 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 66 [2024-11-24 01:33:55,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 65 transitions, 202 flow. Second operand has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:33:55,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:33:55,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 66 [2024-11-24 01:33:55,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:33:55,536 INFO L124 PetriNetUnfolderBase]: 359/714 cut-off events. [2024-11-24 01:33:55,536 INFO L125 PetriNetUnfolderBase]: For 95/95 co-relation queries the response was YES. [2024-11-24 01:33:55,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1469 conditions, 714 events. 359/714 cut-off events. For 95/95 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 3349 event pairs, 237 based on Foata normal form. 0/663 useless extension candidates. Maximal degree in co-relation 1375. Up to 556 conditions per place. [2024-11-24 01:33:55,542 INFO L140 encePairwiseOnDemand]: 60/66 looper letters, 43 selfloop transitions, 2 changer transitions 0/61 dead transitions. [2024-11-24 01:33:55,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 61 transitions, 284 flow [2024-11-24 01:33:55,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-24 01:33:55,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-24 01:33:55,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 137 transitions. [2024-11-24 01:33:55,545 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5189393939393939 [2024-11-24 01:33:55,545 INFO L175 Difference]: Start difference. First operand has 63 places, 65 transitions, 202 flow. Second operand 4 states and 137 transitions. [2024-11-24 01:33:55,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 61 transitions, 284 flow [2024-11-24 01:33:55,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 61 transitions, 276 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-24 01:33:55,550 INFO L231 Difference]: Finished difference. Result has 58 places, 61 transitions, 190 flow [2024-11-24 01:33:55,550 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=190, PETRI_PLACES=58, PETRI_TRANSITIONS=61} [2024-11-24 01:33:55,551 INFO L279 CegarLoopForPetriNet]: 62 programPoint places, -4 predicate places. [2024-11-24 01:33:55,551 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 61 transitions, 190 flow [2024-11-24 01:33:55,551 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:33:55,551 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:33:55,551 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:33:55,551 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-24 01:33:55,551 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-24 01:33:55,552 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:33:55,552 INFO L85 PathProgramCache]: Analyzing trace with hash -462162149, now seen corresponding path program 1 times [2024-11-24 01:33:55,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:33:55,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153434176] [2024-11-24 01:33:55,552 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:33:55,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:33:55,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:33:56,165 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-24 01:33:56,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:33:56,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153434176] [2024-11-24 01:33:56,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153434176] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:33:56,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654961924] [2024-11-24 01:33:56,166 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:33:56,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:33:56,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_652d6fc4-1d4b-4f10-9d18-a2f55a47e55a/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:33:56,168 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_652d6fc4-1d4b-4f10-9d18-a2f55a47e55a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:33:56,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_652d6fc4-1d4b-4f10-9d18-a2f55a47e55a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-24 01:33:56,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:33:56,282 INFO L256 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-24 01:33:56,284 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:33:56,481 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-24 01:33:56,481 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:33:56,576 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-11-24 01:33:56,745 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-24 01:33:56,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654961924] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:33:56,745 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:33:56,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2024-11-24 01:33:56,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465761039] [2024-11-24 01:33:56,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:33:56,746 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-24 01:33:56,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:33:56,746 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-24 01:33:56,748 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2024-11-24 01:33:58,100 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 66 [2024-11-24 01:33:58,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 61 transitions, 190 flow. Second operand has 25 states, 25 states have (on average 32.88) internal successors, (822), 25 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:33:58,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:33:58,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 66 [2024-11-24 01:33:58,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:33:58,747 INFO L124 PetriNetUnfolderBase]: 533/1046 cut-off events. [2024-11-24 01:33:58,747 INFO L125 PetriNetUnfolderBase]: For 57/57 co-relation queries the response was YES. [2024-11-24 01:33:58,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2078 conditions, 1046 events. 533/1046 cut-off events. For 57/57 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 5036 event pairs, 82 based on Foata normal form. 0/946 useless extension candidates. Maximal degree in co-relation 1984. Up to 364 conditions per place. [2024-11-24 01:33:58,753 INFO L140 encePairwiseOnDemand]: 56/66 looper letters, 76 selfloop transitions, 15 changer transitions 0/107 dead transitions. [2024-11-24 01:33:58,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 107 transitions, 489 flow [2024-11-24 01:33:58,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-24 01:33:58,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-24 01:33:58,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 401 transitions. [2024-11-24 01:33:58,756 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6075757575757575 [2024-11-24 01:33:58,756 INFO L175 Difference]: Start difference. First operand has 58 places, 61 transitions, 190 flow. Second operand 10 states and 401 transitions. [2024-11-24 01:33:58,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 107 transitions, 489 flow [2024-11-24 01:33:58,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 107 transitions, 486 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-24 01:33:58,759 INFO L231 Difference]: Finished difference. Result has 67 places, 62 transitions, 237 flow [2024-11-24 01:33:58,759 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=185, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=237, PETRI_PLACES=67, PETRI_TRANSITIONS=62} [2024-11-24 01:33:58,760 INFO L279 CegarLoopForPetriNet]: 62 programPoint places, 5 predicate places. [2024-11-24 01:33:58,760 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 62 transitions, 237 flow [2024-11-24 01:33:58,761 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 32.88) internal successors, (822), 25 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:33:58,761 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:33:58,761 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:33:58,770 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_652d6fc4-1d4b-4f10-9d18-a2f55a47e55a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-24 01:33:58,961 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_652d6fc4-1d4b-4f10-9d18-a2f55a47e55a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-11-24 01:33:58,962 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-24 01:33:58,962 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:33:58,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1474965928, now seen corresponding path program 1 times [2024-11-24 01:33:58,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:33:58,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941596786] [2024-11-24 01:33:58,963 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:33:58,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:33:58,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:33:59,384 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-24 01:33:59,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:33:59,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941596786] [2024-11-24 01:33:59,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941596786] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:33:59,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584283088] [2024-11-24 01:33:59,385 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:33:59,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:33:59,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_652d6fc4-1d4b-4f10-9d18-a2f55a47e55a/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:33:59,387 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_652d6fc4-1d4b-4f10-9d18-a2f55a47e55a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:33:59,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_652d6fc4-1d4b-4f10-9d18-a2f55a47e55a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-24 01:33:59,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:33:59,508 INFO L256 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-24 01:33:59,509 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:33:59,683 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-24 01:33:59,683 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:33:59,780 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-11-24 01:33:59,898 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-24 01:33:59,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584283088] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:33:59,899 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:33:59,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2024-11-24 01:33:59,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498745925] [2024-11-24 01:33:59,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:33:59,899 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-24 01:33:59,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:33:59,900 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-24 01:33:59,901 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2024-11-24 01:34:00,490 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 66 [2024-11-24 01:34:00,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 62 transitions, 237 flow. Second operand has 25 states, 25 states have (on average 32.12) internal successors, (803), 25 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:34:00,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:34:00,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 66 [2024-11-24 01:34:00,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:34:01,254 INFO L124 PetriNetUnfolderBase]: 1255/2490 cut-off events. [2024-11-24 01:34:01,255 INFO L125 PetriNetUnfolderBase]: For 935/935 co-relation queries the response was YES. [2024-11-24 01:34:01,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5088 conditions, 2490 events. 1255/2490 cut-off events. For 935/935 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 14326 event pairs, 245 based on Foata normal form. 0/2279 useless extension candidates. Maximal degree in co-relation 4981. Up to 760 conditions per place. [2024-11-24 01:34:01,271 INFO L140 encePairwiseOnDemand]: 56/66 looper letters, 77 selfloop transitions, 15 changer transitions 0/107 dead transitions. [2024-11-24 01:34:01,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 107 transitions, 573 flow [2024-11-24 01:34:01,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-24 01:34:01,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-24 01:34:01,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 389 transitions. [2024-11-24 01:34:01,277 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5893939393939394 [2024-11-24 01:34:01,278 INFO L175 Difference]: Start difference. First operand has 67 places, 62 transitions, 237 flow. Second operand 10 states and 389 transitions. [2024-11-24 01:34:01,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 107 transitions, 573 flow [2024-11-24 01:34:01,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 107 transitions, 552 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-24 01:34:01,284 INFO L231 Difference]: Finished difference. Result has 72 places, 63 transitions, 263 flow [2024-11-24 01:34:01,285 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=263, PETRI_PLACES=72, PETRI_TRANSITIONS=63} [2024-11-24 01:34:01,285 INFO L279 CegarLoopForPetriNet]: 62 programPoint places, 10 predicate places. [2024-11-24 01:34:01,285 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 63 transitions, 263 flow [2024-11-24 01:34:01,286 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 32.12) internal successors, (803), 25 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:34:01,286 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:34:01,286 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:34:01,299 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_652d6fc4-1d4b-4f10-9d18-a2f55a47e55a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-24 01:34:01,492 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_652d6fc4-1d4b-4f10-9d18-a2f55a47e55a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:34:01,492 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-24 01:34:01,493 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:34:01,493 INFO L85 PathProgramCache]: Analyzing trace with hash 1520697005, now seen corresponding path program 1 times [2024-11-24 01:34:01,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:34:01,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674518871] [2024-11-24 01:34:01,493 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:34:01,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:34:01,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:34:02,062 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-24 01:34:02,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:34:02,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674518871] [2024-11-24 01:34:02,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674518871] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:34:02,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838564070] [2024-11-24 01:34:02,063 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:34:02,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:34:02,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_652d6fc4-1d4b-4f10-9d18-a2f55a47e55a/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:34:02,065 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_652d6fc4-1d4b-4f10-9d18-a2f55a47e55a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:34:02,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_652d6fc4-1d4b-4f10-9d18-a2f55a47e55a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-24 01:34:02,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:34:02,181 INFO L256 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-24 01:34:02,184 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:34:02,195 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-24 01:34:02,203 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 [2024-11-24 01:34:02,314 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-24 01:34:02,315 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 [2024-11-24 01:34:02,325 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 14 treesize of output 9 [2024-11-24 01:34:02,790 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-24 01:34:02,790 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:34:03,348 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-24 01:34:03,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838564070] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-24 01:34:03,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-24 01:34:03,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8] total 24 [2024-11-24 01:34:03,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516996133] [2024-11-24 01:34:03,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:34:03,348 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-24 01:34:03,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:34:03,349 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-24 01:34:03,349 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=501, Unknown=0, NotChecked=0, Total=650 [2024-11-24 01:34:03,785 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 66 [2024-11-24 01:34:03,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 63 transitions, 263 flow. Second operand has 10 states, 10 states have (on average 33.0) internal successors, (330), 10 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:34:03,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:34:03,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 66 [2024-11-24 01:34:03,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:34:04,266 INFO L124 PetriNetUnfolderBase]: 1209/2412 cut-off events. [2024-11-24 01:34:04,266 INFO L125 PetriNetUnfolderBase]: For 1140/1140 co-relation queries the response was YES. [2024-11-24 01:34:04,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5324 conditions, 2412 events. 1209/2412 cut-off events. For 1140/1140 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 14045 event pairs, 395 based on Foata normal form. 0/2333 useless extension candidates. Maximal degree in co-relation 5213. Up to 1136 conditions per place. [2024-11-24 01:34:04,280 INFO L140 encePairwiseOnDemand]: 58/66 looper letters, 55 selfloop transitions, 7 changer transitions 0/78 dead transitions. [2024-11-24 01:34:04,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 78 transitions, 440 flow [2024-11-24 01:34:04,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-24 01:34:04,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-24 01:34:04,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 235 transitions. [2024-11-24 01:34:04,282 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5934343434343434 [2024-11-24 01:34:04,282 INFO L175 Difference]: Start difference. First operand has 72 places, 63 transitions, 263 flow. Second operand 6 states and 235 transitions. [2024-11-24 01:34:04,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 78 transitions, 440 flow [2024-11-24 01:34:04,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 78 transitions, 419 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-24 01:34:04,287 INFO L231 Difference]: Finished difference. Result has 72 places, 63 transitions, 269 flow [2024-11-24 01:34:04,288 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=269, PETRI_PLACES=72, PETRI_TRANSITIONS=63} [2024-11-24 01:34:04,288 INFO L279 CegarLoopForPetriNet]: 62 programPoint places, 10 predicate places. [2024-11-24 01:34:04,290 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 63 transitions, 269 flow [2024-11-24 01:34:04,290 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 33.0) internal successors, (330), 10 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:34:04,290 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:34:04,290 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:34:04,299 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_652d6fc4-1d4b-4f10-9d18-a2f55a47e55a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-24 01:34:04,490 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_652d6fc4-1d4b-4f10-9d18-a2f55a47e55a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-24 01:34:04,491 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-24 01:34:04,492 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:34:04,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1292634881, now seen corresponding path program 1 times [2024-11-24 01:34:04,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:34:04,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678349565] [2024-11-24 01:34:04,492 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:34:04,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:34:04,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:34:04,566 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-24 01:34:04,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:34:04,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678349565] [2024-11-24 01:34:04,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678349565] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 01:34:04,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 01:34:04,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-24 01:34:04,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647101086] [2024-11-24 01:34:04,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:34:04,567 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-24 01:34:04,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:34:04,568 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-24 01:34:04,569 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-24 01:34:04,570 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 66 [2024-11-24 01:34:04,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 63 transitions, 269 flow. Second operand has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:34:04,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:34:04,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 66 [2024-11-24 01:34:04,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:34:05,068 INFO L124 PetriNetUnfolderBase]: 1524/3121 cut-off events. [2024-11-24 01:34:05,068 INFO L125 PetriNetUnfolderBase]: For 2580/2580 co-relation queries the response was YES. [2024-11-24 01:34:05,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7212 conditions, 3121 events. 1524/3121 cut-off events. For 2580/2580 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 19741 event pairs, 795 based on Foata normal form. 68/3119 useless extension candidates. Maximal degree in co-relation 7106. Up to 1657 conditions per place. [2024-11-24 01:34:05,087 INFO L140 encePairwiseOnDemand]: 63/66 looper letters, 72 selfloop transitions, 2 changer transitions 0/93 dead transitions. [2024-11-24 01:34:05,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 93 transitions, 529 flow [2024-11-24 01:34:05,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-24 01:34:05,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-24 01:34:05,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 195 transitions. [2024-11-24 01:34:05,089 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7386363636363636 [2024-11-24 01:34:05,089 INFO L175 Difference]: Start difference. First operand has 72 places, 63 transitions, 269 flow. Second operand 4 states and 195 transitions. [2024-11-24 01:34:05,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 93 transitions, 529 flow [2024-11-24 01:34:05,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 93 transitions, 514 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-24 01:34:05,095 INFO L231 Difference]: Finished difference. Result has 73 places, 64 transitions, 275 flow [2024-11-24 01:34:05,096 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=275, PETRI_PLACES=73, PETRI_TRANSITIONS=64} [2024-11-24 01:34:05,097 INFO L279 CegarLoopForPetriNet]: 62 programPoint places, 11 predicate places. [2024-11-24 01:34:05,097 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 64 transitions, 275 flow [2024-11-24 01:34:05,097 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:34:05,097 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:34:05,098 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:34:05,098 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-24 01:34:05,098 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-24 01:34:05,099 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:34:05,100 INFO L85 PathProgramCache]: Analyzing trace with hash -1950438620, now seen corresponding path program 1 times [2024-11-24 01:34:05,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:34:05,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853221724] [2024-11-24 01:34:05,100 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:34:05,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:34:05,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:34:05,643 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-24 01:34:05,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:34:05,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853221724] [2024-11-24 01:34:05,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853221724] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:34:05,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467450186] [2024-11-24 01:34:05,644 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:34:05,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:34:05,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_652d6fc4-1d4b-4f10-9d18-a2f55a47e55a/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:34:05,646 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_652d6fc4-1d4b-4f10-9d18-a2f55a47e55a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:34:05,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_652d6fc4-1d4b-4f10-9d18-a2f55a47e55a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-24 01:34:05,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:34:05,777 INFO L256 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-24 01:34:05,780 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:34:05,789 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 [2024-11-24 01:34:05,796 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-24 01:34:05,879 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-24 01:34:05,879 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 [2024-11-24 01:34:05,890 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 14 treesize of output 9 [2024-11-24 01:34:06,386 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-24 01:34:06,386 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:34:06,834 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 25 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-24 01:34:06,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467450186] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:34:06,834 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:34:06,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 26 [2024-11-24 01:34:06,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856480120] [2024-11-24 01:34:06,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:34:06,835 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-24 01:34:06,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:34:06,836 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-24 01:34:06,836 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=583, Unknown=0, NotChecked=0, Total=756 [2024-11-24 01:34:08,502 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 66 [2024-11-24 01:34:08,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 64 transitions, 275 flow. Second operand has 28 states, 28 states have (on average 28.464285714285715) internal successors, (797), 28 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:34:08,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:34:08,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 66 [2024-11-24 01:34:08,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:34:10,265 INFO L124 PetriNetUnfolderBase]: 3253/6198 cut-off events. [2024-11-24 01:34:10,265 INFO L125 PetriNetUnfolderBase]: For 4970/4970 co-relation queries the response was YES. [2024-11-24 01:34:10,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15134 conditions, 6198 events. 3253/6198 cut-off events. For 4970/4970 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 38432 event pairs, 338 based on Foata normal form. 102/6249 useless extension candidates. Maximal degree in co-relation 15028. Up to 1304 conditions per place. [2024-11-24 01:34:10,309 INFO L140 encePairwiseOnDemand]: 57/66 looper letters, 131 selfloop transitions, 17 changer transitions 0/163 dead transitions. [2024-11-24 01:34:10,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 163 transitions, 935 flow [2024-11-24 01:34:10,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-24 01:34:10,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-24 01:34:10,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 580 transitions. [2024-11-24 01:34:10,312 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5169340463458111 [2024-11-24 01:34:10,312 INFO L175 Difference]: Start difference. First operand has 73 places, 64 transitions, 275 flow. Second operand 17 states and 580 transitions. [2024-11-24 01:34:10,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 163 transitions, 935 flow [2024-11-24 01:34:10,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 163 transitions, 931 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-24 01:34:10,330 INFO L231 Difference]: Finished difference. Result has 92 places, 67 transitions, 354 flow [2024-11-24 01:34:10,331 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=354, PETRI_PLACES=92, PETRI_TRANSITIONS=67} [2024-11-24 01:34:10,331 INFO L279 CegarLoopForPetriNet]: 62 programPoint places, 30 predicate places. [2024-11-24 01:34:10,331 INFO L471 AbstractCegarLoop]: Abstraction has has 92 places, 67 transitions, 354 flow [2024-11-24 01:34:10,332 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 28.464285714285715) internal successors, (797), 28 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:34:10,332 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:34:10,332 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:34:10,342 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_652d6fc4-1d4b-4f10-9d18-a2f55a47e55a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-24 01:34:10,532 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_652d6fc4-1d4b-4f10-9d18-a2f55a47e55a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-24 01:34:10,533 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-24 01:34:10,533 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:34:10,533 INFO L85 PathProgramCache]: Analyzing trace with hash 1504658210, now seen corresponding path program 1 times [2024-11-24 01:34:10,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:34:10,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7971569] [2024-11-24 01:34:10,533 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:34:10,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:34:10,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:34:10,604 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-24 01:34:10,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:34:10,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7971569] [2024-11-24 01:34:10,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7971569] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 01:34:10,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 01:34:10,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-24 01:34:10,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507571422] [2024-11-24 01:34:10,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:34:10,605 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-24 01:34:10,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:34:10,606 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-24 01:34:10,606 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-24 01:34:10,606 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 66 [2024-11-24 01:34:10,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 67 transitions, 354 flow. Second operand has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:34:10,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:34:10,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 66 [2024-11-24 01:34:10,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:34:11,868 INFO L124 PetriNetUnfolderBase]: 3890/7835 cut-off events. [2024-11-24 01:34:11,868 INFO L125 PetriNetUnfolderBase]: For 8896/8896 co-relation queries the response was YES. [2024-11-24 01:34:11,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19210 conditions, 7835 events. 3890/7835 cut-off events. For 8896/8896 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 57468 event pairs, 2355 based on Foata normal form. 208/7949 useless extension candidates. Maximal degree in co-relation 19089. Up to 4430 conditions per place. [2024-11-24 01:34:11,936 INFO L140 encePairwiseOnDemand]: 63/66 looper letters, 78 selfloop transitions, 2 changer transitions 0/100 dead transitions. [2024-11-24 01:34:11,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 100 transitions, 721 flow [2024-11-24 01:34:11,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-24 01:34:11,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-24 01:34:11,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 192 transitions. [2024-11-24 01:34:11,938 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7272727272727273 [2024-11-24 01:34:11,938 INFO L175 Difference]: Start difference. First operand has 92 places, 67 transitions, 354 flow. Second operand 4 states and 192 transitions. [2024-11-24 01:34:11,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 100 transitions, 721 flow [2024-11-24 01:34:11,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 100 transitions, 698 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-24 01:34:11,958 INFO L231 Difference]: Finished difference. Result has 91 places, 68 transitions, 350 flow [2024-11-24 01:34:11,958 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=335, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=350, PETRI_PLACES=91, PETRI_TRANSITIONS=68} [2024-11-24 01:34:11,960 INFO L279 CegarLoopForPetriNet]: 62 programPoint places, 29 predicate places. [2024-11-24 01:34:11,961 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 68 transitions, 350 flow [2024-11-24 01:34:11,961 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:34:11,961 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:34:11,961 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:34:11,961 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-24 01:34:11,963 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-24 01:34:11,964 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:34:11,964 INFO L85 PathProgramCache]: Analyzing trace with hash 901939731, now seen corresponding path program 1 times [2024-11-24 01:34:11,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:34:11,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802711245] [2024-11-24 01:34:11,964 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:34:11,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:34:11,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:34:12,060 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-24 01:34:12,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:34:12,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802711245] [2024-11-24 01:34:12,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802711245] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 01:34:12,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 01:34:12,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-24 01:34:12,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744763451] [2024-11-24 01:34:12,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:34:12,061 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-24 01:34:12,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:34:12,062 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-24 01:34:12,062 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-24 01:34:12,085 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 66 [2024-11-24 01:34:12,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 68 transitions, 350 flow. Second operand has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:34:12,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:34:12,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 66 [2024-11-24 01:34:12,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:34:13,104 INFO L124 PetriNetUnfolderBase]: 4407/8894 cut-off events. [2024-11-24 01:34:13,104 INFO L125 PetriNetUnfolderBase]: For 10496/10496 co-relation queries the response was YES. [2024-11-24 01:34:13,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22869 conditions, 8894 events. 4407/8894 cut-off events. For 10496/10496 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 65495 event pairs, 3169 based on Foata normal form. 5/8548 useless extension candidates. Maximal degree in co-relation 22754. Up to 5793 conditions per place. [2024-11-24 01:34:13,157 INFO L140 encePairwiseOnDemand]: 60/66 looper letters, 82 selfloop transitions, 5 changer transitions 2/108 dead transitions. [2024-11-24 01:34:13,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 108 transitions, 683 flow [2024-11-24 01:34:13,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-24 01:34:13,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-24 01:34:13,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 233 transitions. [2024-11-24 01:34:13,158 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.706060606060606 [2024-11-24 01:34:13,158 INFO L175 Difference]: Start difference. First operand has 91 places, 68 transitions, 350 flow. Second operand 5 states and 233 transitions. [2024-11-24 01:34:13,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 108 transitions, 683 flow [2024-11-24 01:34:13,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 108 transitions, 680 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-24 01:34:13,185 INFO L231 Difference]: Finished difference. Result has 96 places, 69 transitions, 369 flow [2024-11-24 01:34:13,186 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=349, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=369, PETRI_PLACES=96, PETRI_TRANSITIONS=69} [2024-11-24 01:34:13,186 INFO L279 CegarLoopForPetriNet]: 62 programPoint places, 34 predicate places. [2024-11-24 01:34:13,187 INFO L471 AbstractCegarLoop]: Abstraction has has 96 places, 69 transitions, 369 flow [2024-11-24 01:34:13,187 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:34:13,187 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:34:13,188 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:34:13,188 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-24 01:34:13,188 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-24 01:34:13,188 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:34:13,190 INFO L85 PathProgramCache]: Analyzing trace with hash 1198821169, now seen corresponding path program 2 times [2024-11-24 01:34:13,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:34:13,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672573899] [2024-11-24 01:34:13,190 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 01:34:13,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:34:13,204 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-24 01:34:13,204 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:34:13,334 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-24 01:34:13,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:34:13,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672573899] [2024-11-24 01:34:13,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672573899] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 01:34:13,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 01:34:13,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-24 01:34:13,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004365676] [2024-11-24 01:34:13,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:34:13,336 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-24 01:34:13,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:34:13,337 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-24 01:34:13,338 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-24 01:34:13,338 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 66 [2024-11-24 01:34:13,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 69 transitions, 369 flow. Second operand has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:34:13,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:34:13,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 66 [2024-11-24 01:34:13,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:34:14,448 INFO L124 PetriNetUnfolderBase]: 4157/8213 cut-off events. [2024-11-24 01:34:14,448 INFO L125 PetriNetUnfolderBase]: For 12021/12021 co-relation queries the response was YES. [2024-11-24 01:34:14,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21957 conditions, 8213 events. 4157/8213 cut-off events. For 12021/12021 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 60367 event pairs, 1915 based on Foata normal form. 15/8053 useless extension candidates. Maximal degree in co-relation 21838. Up to 3921 conditions per place. [2024-11-24 01:34:14,493 INFO L140 encePairwiseOnDemand]: 62/66 looper letters, 73 selfloop transitions, 3 changer transitions 1/97 dead transitions. [2024-11-24 01:34:14,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 97 transitions, 696 flow [2024-11-24 01:34:14,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-24 01:34:14,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-24 01:34:14,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 154 transitions. [2024-11-24 01:34:14,495 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7777777777777778 [2024-11-24 01:34:14,495 INFO L175 Difference]: Start difference. First operand has 96 places, 69 transitions, 369 flow. Second operand 3 states and 154 transitions. [2024-11-24 01:34:14,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 97 transitions, 696 flow [2024-11-24 01:34:14,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 97 transitions, 684 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-24 01:34:14,513 INFO L231 Difference]: Finished difference. Result has 96 places, 71 transitions, 380 flow [2024-11-24 01:34:14,514 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=361, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=380, PETRI_PLACES=96, PETRI_TRANSITIONS=71} [2024-11-24 01:34:14,514 INFO L279 CegarLoopForPetriNet]: 62 programPoint places, 34 predicate places. [2024-11-24 01:34:14,514 INFO L471 AbstractCegarLoop]: Abstraction has has 96 places, 71 transitions, 380 flow [2024-11-24 01:34:14,514 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:34:14,515 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:34:14,515 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:34:14,515 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-24 01:34:14,515 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-24 01:34:14,515 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:34:14,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1581604931, now seen corresponding path program 1 times [2024-11-24 01:34:14,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:34:14,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496551084] [2024-11-24 01:34:14,516 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:34:14,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:34:14,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:34:15,029 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 12 proven. 16 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-24 01:34:15,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:34:15,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496551084] [2024-11-24 01:34:15,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496551084] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:34:15,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594434111] [2024-11-24 01:34:15,030 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:34:15,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:34:15,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_652d6fc4-1d4b-4f10-9d18-a2f55a47e55a/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:34:15,032 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_652d6fc4-1d4b-4f10-9d18-a2f55a47e55a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:34:15,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_652d6fc4-1d4b-4f10-9d18-a2f55a47e55a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-24 01:34:15,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:34:15,174 INFO L256 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-24 01:34:15,178 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:34:15,188 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-24 01:34:15,192 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 [2024-11-24 01:34:15,304 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-24 01:34:15,304 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-11-24 01:34:15,325 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-24 01:34:15,326 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 [2024-11-24 01:34:15,909 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 20 proven. 8 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-24 01:34:15,909 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:34:16,426 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 25 proven. 3 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-24 01:34:16,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594434111] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:34:16,427 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:34:16,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 26 [2024-11-24 01:34:16,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784169264] [2024-11-24 01:34:16,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:34:16,427 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-24 01:34:16,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:34:16,428 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-24 01:34:16,429 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=583, Unknown=0, NotChecked=0, Total=756 [2024-11-24 01:34:18,304 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 66 [2024-11-24 01:34:18,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 71 transitions, 380 flow. Second operand has 28 states, 28 states have (on average 29.571428571428573) internal successors, (828), 28 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:34:18,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:34:18,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 66 [2024-11-24 01:34:18,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:34:20,721 INFO L124 PetriNetUnfolderBase]: 8299/16879 cut-off events. [2024-11-24 01:34:20,721 INFO L125 PetriNetUnfolderBase]: For 21419/21419 co-relation queries the response was YES. [2024-11-24 01:34:20,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47000 conditions, 16879 events. 8299/16879 cut-off events. For 21419/21419 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 134146 event pairs, 1319 based on Foata normal form. 327/17084 useless extension candidates. Maximal degree in co-relation 46881. Up to 3350 conditions per place. [2024-11-24 01:34:20,810 INFO L140 encePairwiseOnDemand]: 57/66 looper letters, 147 selfloop transitions, 17 changer transitions 0/181 dead transitions. [2024-11-24 01:34:20,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 181 transitions, 1344 flow [2024-11-24 01:34:20,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-24 01:34:20,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-24 01:34:20,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 585 transitions. [2024-11-24 01:34:20,813 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5213903743315508 [2024-11-24 01:34:20,813 INFO L175 Difference]: Start difference. First operand has 96 places, 71 transitions, 380 flow. Second operand 17 states and 585 transitions. [2024-11-24 01:34:20,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 181 transitions, 1344 flow [2024-11-24 01:34:20,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 181 transitions, 1334 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-24 01:34:20,854 INFO L231 Difference]: Finished difference. Result has 115 places, 74 transitions, 457 flow [2024-11-24 01:34:20,854 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=377, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=457, PETRI_PLACES=115, PETRI_TRANSITIONS=74} [2024-11-24 01:34:20,855 INFO L279 CegarLoopForPetriNet]: 62 programPoint places, 53 predicate places. [2024-11-24 01:34:20,855 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 74 transitions, 457 flow [2024-11-24 01:34:20,855 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 29.571428571428573) internal successors, (828), 28 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:34:20,856 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:34:20,856 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:34:20,866 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_652d6fc4-1d4b-4f10-9d18-a2f55a47e55a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-24 01:34:21,060 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_652d6fc4-1d4b-4f10-9d18-a2f55a47e55a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-24 01:34:21,060 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-24 01:34:21,061 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:34:21,061 INFO L85 PathProgramCache]: Analyzing trace with hash -1686037115, now seen corresponding path program 1 times [2024-11-24 01:34:21,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:34:21,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687261259] [2024-11-24 01:34:21,061 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:34:21,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:34:21,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:34:21,159 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-24 01:34:21,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:34:21,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687261259] [2024-11-24 01:34:21,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687261259] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 01:34:21,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 01:34:21,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-24 01:34:21,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058509023] [2024-11-24 01:34:21,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:34:21,161 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-24 01:34:21,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:34:21,161 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-24 01:34:21,161 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-24 01:34:21,184 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 66 [2024-11-24 01:34:21,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 74 transitions, 457 flow. Second operand has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:34:21,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:34:21,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 66 [2024-11-24 01:34:21,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:34:24,239 INFO L124 PetriNetUnfolderBase]: 9934/20468 cut-off events. [2024-11-24 01:34:24,240 INFO L125 PetriNetUnfolderBase]: For 32440/32440 co-relation queries the response was YES. [2024-11-24 01:34:24,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57409 conditions, 20468 events. 9934/20468 cut-off events. For 32440/32440 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 172987 event pairs, 4889 based on Foata normal form. 0/19765 useless extension candidates. Maximal degree in co-relation 57275. Up to 14316 conditions per place. [2024-11-24 01:34:24,388 INFO L140 encePairwiseOnDemand]: 61/66 looper letters, 84 selfloop transitions, 4 changer transitions 0/108 dead transitions. [2024-11-24 01:34:24,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 108 transitions, 821 flow [2024-11-24 01:34:24,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-24 01:34:24,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-24 01:34:24,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 190 transitions. [2024-11-24 01:34:24,389 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7196969696969697 [2024-11-24 01:34:24,389 INFO L175 Difference]: Start difference. First operand has 115 places, 74 transitions, 457 flow. Second operand 4 states and 190 transitions. [2024-11-24 01:34:24,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 108 transitions, 821 flow [2024-11-24 01:34:24,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 108 transitions, 796 flow, removed 0 selfloop flow, removed 12 redundant places. [2024-11-24 01:34:24,473 INFO L231 Difference]: Finished difference. Result has 109 places, 78 transitions, 500 flow [2024-11-24 01:34:24,473 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=434, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=500, PETRI_PLACES=109, PETRI_TRANSITIONS=78} [2024-11-24 01:34:24,477 INFO L279 CegarLoopForPetriNet]: 62 programPoint places, 47 predicate places. [2024-11-24 01:34:24,477 INFO L471 AbstractCegarLoop]: Abstraction has has 109 places, 78 transitions, 500 flow [2024-11-24 01:34:24,478 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:34:24,478 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:34:24,478 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:34:24,478 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-24 01:34:24,478 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-24 01:34:24,479 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:34:24,479 INFO L85 PathProgramCache]: Analyzing trace with hash -977779657, now seen corresponding path program 2 times [2024-11-24 01:34:24,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:34:24,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321519190] [2024-11-24 01:34:24,479 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 01:34:24,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:34:24,512 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-24 01:34:24,512 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:34:24,562 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-24 01:34:24,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:34:24,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321519190] [2024-11-24 01:34:24,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321519190] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 01:34:24,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 01:34:24,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-24 01:34:24,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533329621] [2024-11-24 01:34:24,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:34:24,563 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-24 01:34:24,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:34:24,564 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-24 01:34:24,564 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-24 01:34:24,587 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 66 [2024-11-24 01:34:24,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 78 transitions, 500 flow. Second operand has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:34:24,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:34:24,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 66 [2024-11-24 01:34:24,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:34:27,497 INFO L124 PetriNetUnfolderBase]: 9966/20512 cut-off events. [2024-11-24 01:34:27,497 INFO L125 PetriNetUnfolderBase]: For 35863/35863 co-relation queries the response was YES. [2024-11-24 01:34:27,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59195 conditions, 20512 events. 9966/20512 cut-off events. For 35863/35863 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 173045 event pairs, 6885 based on Foata normal form. 4/20346 useless extension candidates. Maximal degree in co-relation 59069. Up to 11333 conditions per place. [2024-11-24 01:34:27,599 INFO L140 encePairwiseOnDemand]: 60/66 looper letters, 94 selfloop transitions, 7 changer transitions 2/123 dead transitions. [2024-11-24 01:34:27,599 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 123 transitions, 982 flow [2024-11-24 01:34:27,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-24 01:34:27,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-24 01:34:27,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 229 transitions. [2024-11-24 01:34:27,745 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.693939393939394 [2024-11-24 01:34:27,745 INFO L175 Difference]: Start difference. First operand has 109 places, 78 transitions, 500 flow. Second operand 5 states and 229 transitions. [2024-11-24 01:34:27,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 123 transitions, 982 flow [2024-11-24 01:34:27,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 123 transitions, 982 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-24 01:34:27,801 INFO L231 Difference]: Finished difference. Result has 115 places, 79 transitions, 528 flow [2024-11-24 01:34:27,801 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=500, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=528, PETRI_PLACES=115, PETRI_TRANSITIONS=79} [2024-11-24 01:34:27,802 INFO L279 CegarLoopForPetriNet]: 62 programPoint places, 53 predicate places. [2024-11-24 01:34:27,802 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 79 transitions, 528 flow [2024-11-24 01:34:27,802 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:34:27,802 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:34:27,802 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:34:27,802 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-24 01:34:27,802 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-24 01:34:27,803 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:34:27,803 INFO L85 PathProgramCache]: Analyzing trace with hash 44018297, now seen corresponding path program 1 times [2024-11-24 01:34:27,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:34:27,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966515377] [2024-11-24 01:34:27,803 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:34:27,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:34:27,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:34:27,879 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-24 01:34:27,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:34:27,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966515377] [2024-11-24 01:34:27,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966515377] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 01:34:27,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 01:34:27,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-24 01:34:27,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784689407] [2024-11-24 01:34:27,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:34:27,880 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-24 01:34:27,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:34:27,881 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-24 01:34:27,881 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-24 01:34:27,904 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 66 [2024-11-24 01:34:27,905 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 79 transitions, 528 flow. Second operand has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:34:27,905 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:34:27,905 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 66 [2024-11-24 01:34:27,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:34:30,438 INFO L124 PetriNetUnfolderBase]: 9949/20454 cut-off events. [2024-11-24 01:34:30,438 INFO L125 PetriNetUnfolderBase]: For 41303/41303 co-relation queries the response was YES. [2024-11-24 01:34:30,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60109 conditions, 20454 events. 9949/20454 cut-off events. For 41303/41303 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 172624 event pairs, 7283 based on Foata normal form. 90/20371 useless extension candidates. Maximal degree in co-relation 59978. Up to 13137 conditions per place. [2024-11-24 01:34:30,541 INFO L140 encePairwiseOnDemand]: 61/66 looper letters, 103 selfloop transitions, 5 changer transitions 0/129 dead transitions. [2024-11-24 01:34:30,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 129 transitions, 1072 flow [2024-11-24 01:34:30,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-24 01:34:30,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-24 01:34:30,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 202 transitions. [2024-11-24 01:34:30,542 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7651515151515151 [2024-11-24 01:34:30,542 INFO L175 Difference]: Start difference. First operand has 115 places, 79 transitions, 528 flow. Second operand 4 states and 202 transitions. [2024-11-24 01:34:30,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 129 transitions, 1072 flow [2024-11-24 01:34:30,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 129 transitions, 1042 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-11-24 01:34:30,597 INFO L231 Difference]: Finished difference. Result has 117 places, 81 transitions, 555 flow [2024-11-24 01:34:30,597 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=512, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=555, PETRI_PLACES=117, PETRI_TRANSITIONS=81} [2024-11-24 01:34:30,597 INFO L279 CegarLoopForPetriNet]: 62 programPoint places, 55 predicate places. [2024-11-24 01:34:30,597 INFO L471 AbstractCegarLoop]: Abstraction has has 117 places, 81 transitions, 555 flow [2024-11-24 01:34:30,597 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:34:30,597 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:34:30,597 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:34:30,598 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-11-24 01:34:30,598 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-24 01:34:30,598 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:34:30,598 INFO L85 PathProgramCache]: Analyzing trace with hash -1870955025, now seen corresponding path program 3 times [2024-11-24 01:34:30,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:34:30,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569172795] [2024-11-24 01:34:30,598 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-24 01:34:30,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:34:30,613 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-11-24 01:34:30,613 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:34:30,645 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-24 01:34:30,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:34:30,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569172795] [2024-11-24 01:34:30,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569172795] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 01:34:30,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 01:34:30,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-24 01:34:30,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227247648] [2024-11-24 01:34:30,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:34:30,646 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-24 01:34:30,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:34:30,647 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-24 01:34:30,647 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-24 01:34:30,675 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 66 [2024-11-24 01:34:30,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 81 transitions, 555 flow. Second operand has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:34:30,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:34:30,675 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 66 [2024-11-24 01:34:30,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:34:33,384 INFO L124 PetriNetUnfolderBase]: 9856/20362 cut-off events. [2024-11-24 01:34:33,384 INFO L125 PetriNetUnfolderBase]: For 41436/41436 co-relation queries the response was YES. [2024-11-24 01:34:33,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59892 conditions, 20362 events. 9856/20362 cut-off events. For 41436/41436 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 171851 event pairs, 7017 based on Foata normal form. 107/20316 useless extension candidates. Maximal degree in co-relation 59761. Up to 11752 conditions per place. [2024-11-24 01:34:33,493 INFO L140 encePairwiseOnDemand]: 61/66 looper letters, 92 selfloop transitions, 8 changer transitions 2/123 dead transitions. [2024-11-24 01:34:33,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 123 transitions, 1038 flow [2024-11-24 01:34:33,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-24 01:34:33,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-24 01:34:33,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 196 transitions. [2024-11-24 01:34:33,495 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7424242424242424 [2024-11-24 01:34:33,495 INFO L175 Difference]: Start difference. First operand has 117 places, 81 transitions, 555 flow. Second operand 4 states and 196 transitions. [2024-11-24 01:34:33,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 123 transitions, 1038 flow [2024-11-24 01:34:33,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 123 transitions, 1029 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-24 01:34:33,604 INFO L231 Difference]: Finished difference. Result has 120 places, 82 transitions, 592 flow [2024-11-24 01:34:33,604 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=550, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=592, PETRI_PLACES=120, PETRI_TRANSITIONS=82} [2024-11-24 01:34:33,605 INFO L279 CegarLoopForPetriNet]: 62 programPoint places, 58 predicate places. [2024-11-24 01:34:33,605 INFO L471 AbstractCegarLoop]: Abstraction has has 120 places, 82 transitions, 592 flow [2024-11-24 01:34:33,605 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:34:33,605 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:34:33,605 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:34:33,605 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-11-24 01:34:33,606 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-24 01:34:33,606 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:34:33,606 INFO L85 PathProgramCache]: Analyzing trace with hash -638621153, now seen corresponding path program 2 times [2024-11-24 01:34:33,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:34:33,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971290296] [2024-11-24 01:34:33,606 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 01:34:33,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:34:33,620 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-24 01:34:33,620 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:34:33,663 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-24 01:34:33,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:34:33,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971290296] [2024-11-24 01:34:33,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971290296] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 01:34:33,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 01:34:33,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-24 01:34:33,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009100976] [2024-11-24 01:34:33,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:34:33,664 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-24 01:34:33,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:34:33,664 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-24 01:34:33,664 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-24 01:34:33,682 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 66 [2024-11-24 01:34:33,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 82 transitions, 592 flow. Second operand has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:34:33,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:34:33,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 66 [2024-11-24 01:34:33,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:34:36,669 INFO L124 PetriNetUnfolderBase]: 10358/21460 cut-off events. [2024-11-24 01:34:36,669 INFO L125 PetriNetUnfolderBase]: For 46943/46943 co-relation queries the response was YES. [2024-11-24 01:34:36,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64291 conditions, 21460 events. 10358/21460 cut-off events. For 46943/46943 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 185683 event pairs, 6085 based on Foata normal form. 90/21389 useless extension candidates. Maximal degree in co-relation 64159. Up to 15168 conditions per place. [2024-11-24 01:34:36,768 INFO L140 encePairwiseOnDemand]: 61/66 looper letters, 81 selfloop transitions, 6 changer transitions 3/112 dead transitions. [2024-11-24 01:34:36,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 112 transitions, 937 flow [2024-11-24 01:34:36,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-24 01:34:36,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-24 01:34:36,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 191 transitions. [2024-11-24 01:34:36,769 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7234848484848485 [2024-11-24 01:34:36,769 INFO L175 Difference]: Start difference. First operand has 120 places, 82 transitions, 592 flow. Second operand 4 states and 191 transitions. [2024-11-24 01:34:36,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 112 transitions, 937 flow [2024-11-24 01:34:36,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 112 transitions, 921 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-11-24 01:34:36,818 INFO L231 Difference]: Finished difference. Result has 121 places, 83 transitions, 614 flow [2024-11-24 01:34:36,818 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=578, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=614, PETRI_PLACES=121, PETRI_TRANSITIONS=83} [2024-11-24 01:34:36,819 INFO L279 CegarLoopForPetriNet]: 62 programPoint places, 59 predicate places. [2024-11-24 01:34:36,819 INFO L471 AbstractCegarLoop]: Abstraction has has 121 places, 83 transitions, 614 flow [2024-11-24 01:34:36,819 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:34:36,819 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:34:36,819 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-24 01:34:36,819 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-11-24 01:34:36,819 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-24 01:34:36,820 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:34:36,820 INFO L85 PathProgramCache]: Analyzing trace with hash -137445763, now seen corresponding path program 1 times [2024-11-24 01:34:36,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:34:36,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725652683] [2024-11-24 01:34:36,820 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:34:36,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:34:36,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:34:37,271 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 12 proven. 27 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-24 01:34:37,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:34:37,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725652683] [2024-11-24 01:34:37,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725652683] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:34:37,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246692680] [2024-11-24 01:34:37,273 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:34:37,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:34:37,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_652d6fc4-1d4b-4f10-9d18-a2f55a47e55a/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:34:37,275 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_652d6fc4-1d4b-4f10-9d18-a2f55a47e55a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:34:37,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_652d6fc4-1d4b-4f10-9d18-a2f55a47e55a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-24 01:34:37,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:34:37,419 INFO L256 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-24 01:34:37,420 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:34:37,741 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 20 proven. 19 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-24 01:34:37,741 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:34:37,929 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-11-24 01:34:38,066 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 20 proven. 19 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-24 01:34:38,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246692680] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:34:38,067 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:34:38,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2024-11-24 01:34:38,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334000751] [2024-11-24 01:34:38,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:34:38,067 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-24 01:34:38,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:34:38,068 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-24 01:34:38,068 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=806, Unknown=0, NotChecked=0, Total=992 [2024-11-24 01:34:39,990 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 66 [2024-11-24 01:34:39,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 83 transitions, 614 flow. Second operand has 32 states, 32 states have (on average 33.25) internal successors, (1064), 32 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:34:39,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:34:39,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 66 [2024-11-24 01:34:39,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:34:43,847 INFO L124 PetriNetUnfolderBase]: 12584/25476 cut-off events. [2024-11-24 01:34:43,848 INFO L125 PetriNetUnfolderBase]: For 55598/55599 co-relation queries the response was YES. [2024-11-24 01:34:43,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75888 conditions, 25476 events. 12584/25476 cut-off events. For 55598/55599 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 215765 event pairs, 2143 based on Foata normal form. 342/25671 useless extension candidates. Maximal degree in co-relation 75756. Up to 5091 conditions per place. [2024-11-24 01:34:44,007 INFO L140 encePairwiseOnDemand]: 57/66 looper letters, 185 selfloop transitions, 21 changer transitions 0/228 dead transitions. [2024-11-24 01:34:44,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 228 transitions, 1938 flow [2024-11-24 01:34:44,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-24 01:34:44,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-24 01:34:44,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 558 transitions. [2024-11-24 01:34:44,008 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6503496503496503 [2024-11-24 01:34:44,008 INFO L175 Difference]: Start difference. First operand has 121 places, 83 transitions, 614 flow. Second operand 13 states and 558 transitions. [2024-11-24 01:34:44,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 228 transitions, 1938 flow [2024-11-24 01:34:44,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 228 transitions, 1926 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-11-24 01:34:44,070 INFO L231 Difference]: Finished difference. Result has 133 places, 85 transitions, 686 flow [2024-11-24 01:34:44,070 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=602, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=686, PETRI_PLACES=133, PETRI_TRANSITIONS=85} [2024-11-24 01:34:44,070 INFO L279 CegarLoopForPetriNet]: 62 programPoint places, 71 predicate places. [2024-11-24 01:34:44,071 INFO L471 AbstractCegarLoop]: Abstraction has has 133 places, 85 transitions, 686 flow [2024-11-24 01:34:44,071 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 33.25) internal successors, (1064), 32 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:34:44,071 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:34:44,071 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:34:44,081 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_652d6fc4-1d4b-4f10-9d18-a2f55a47e55a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-24 01:34:44,275 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_652d6fc4-1d4b-4f10-9d18-a2f55a47e55a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:34:44,275 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-24 01:34:44,276 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:34:44,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1905514552, now seen corresponding path program 1 times [2024-11-24 01:34:44,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:34:44,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415788128] [2024-11-24 01:34:44,276 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:34:44,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:34:44,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:34:44,832 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 12 proven. 25 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-24 01:34:44,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:34:44,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415788128] [2024-11-24 01:34:44,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415788128] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:34:44,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072165455] [2024-11-24 01:34:44,833 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:34:44,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:34:44,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_652d6fc4-1d4b-4f10-9d18-a2f55a47e55a/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:34:44,835 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_652d6fc4-1d4b-4f10-9d18-a2f55a47e55a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:34:44,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_652d6fc4-1d4b-4f10-9d18-a2f55a47e55a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-24 01:34:44,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:34:44,970 INFO L256 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-24 01:34:44,975 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:34:45,278 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 20 proven. 17 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-24 01:34:45,278 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:34:45,464 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-11-24 01:34:45,583 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 20 proven. 17 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-24 01:34:45,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072165455] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:34:45,583 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:34:45,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2024-11-24 01:34:45,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331688767] [2024-11-24 01:34:45,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:34:45,584 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-24 01:34:45,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:34:45,585 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-24 01:34:45,585 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=806, Unknown=0, NotChecked=0, Total=992 [2024-11-24 01:34:46,922 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 66 [2024-11-24 01:34:46,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 85 transitions, 686 flow. Second operand has 32 states, 32 states have (on average 32.625) internal successors, (1044), 32 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:34:46,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:34:46,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 66 [2024-11-24 01:34:46,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:34:51,457 INFO L124 PetriNetUnfolderBase]: 16367/31924 cut-off events. [2024-11-24 01:34:51,457 INFO L125 PetriNetUnfolderBase]: For 79953/79954 co-relation queries the response was YES. [2024-11-24 01:34:51,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96849 conditions, 31924 events. 16367/31924 cut-off events. For 79953/79954 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 267482 event pairs, 2150 based on Foata normal form. 453/32293 useless extension candidates. Maximal degree in co-relation 96703. Up to 6869 conditions per place. [2024-11-24 01:34:51,647 INFO L140 encePairwiseOnDemand]: 57/66 looper letters, 186 selfloop transitions, 21 changer transitions 0/229 dead transitions. [2024-11-24 01:34:51,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 229 transitions, 2170 flow [2024-11-24 01:34:51,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-24 01:34:51,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-24 01:34:51,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 540 transitions. [2024-11-24 01:34:51,651 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6293706293706294 [2024-11-24 01:34:51,651 INFO L175 Difference]: Start difference. First operand has 133 places, 85 transitions, 686 flow. Second operand 13 states and 540 transitions. [2024-11-24 01:34:51,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 229 transitions, 2170 flow [2024-11-24 01:34:51,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 229 transitions, 2099 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-11-24 01:34:51,745 INFO L231 Difference]: Finished difference. Result has 140 places, 87 transitions, 739 flow [2024-11-24 01:34:51,746 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=655, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=739, PETRI_PLACES=140, PETRI_TRANSITIONS=87} [2024-11-24 01:34:51,746 INFO L279 CegarLoopForPetriNet]: 62 programPoint places, 78 predicate places. [2024-11-24 01:34:51,746 INFO L471 AbstractCegarLoop]: Abstraction has has 140 places, 87 transitions, 739 flow [2024-11-24 01:34:51,746 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 32.625) internal successors, (1044), 32 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:34:51,747 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:34:51,747 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 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] [2024-11-24 01:34:51,753 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_652d6fc4-1d4b-4f10-9d18-a2f55a47e55a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-24 01:34:51,947 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_652d6fc4-1d4b-4f10-9d18-a2f55a47e55a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:34:51,947 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-24 01:34:51,947 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:34:51,948 INFO L85 PathProgramCache]: Analyzing trace with hash -641895071, now seen corresponding path program 1 times [2024-11-24 01:34:51,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:34:51,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342400831] [2024-11-24 01:34:51,948 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:34:51,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:34:51,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:34:52,650 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-24 01:34:52,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:34:52,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342400831] [2024-11-24 01:34:52,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342400831] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 01:34:52,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 01:34:52,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-11-24 01:34:52,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497160733] [2024-11-24 01:34:52,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:34:52,651 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-24 01:34:52,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:34:52,651 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-24 01:34:52,652 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-11-24 01:34:53,168 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 66 [2024-11-24 01:34:53,169 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 87 transitions, 739 flow. Second operand has 12 states, 12 states have (on average 32.333333333333336) internal successors, (388), 12 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:34:53,169 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:34:53,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 66 [2024-11-24 01:34:53,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:34:58,990 INFO L124 PetriNetUnfolderBase]: 19348/37419 cut-off events. [2024-11-24 01:34:58,990 INFO L125 PetriNetUnfolderBase]: For 108771/108994 co-relation queries the response was YES. [2024-11-24 01:34:59,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118032 conditions, 37419 events. 19348/37419 cut-off events. For 108771/108994 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 311116 event pairs, 14248 based on Foata normal form. 9/37397 useless extension candidates. Maximal degree in co-relation 117881. Up to 25124 conditions per place. [2024-11-24 01:34:59,225 INFO L140 encePairwiseOnDemand]: 52/66 looper letters, 217 selfloop transitions, 25 changer transitions 0/257 dead transitions. [2024-11-24 01:34:59,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 257 transitions, 2493 flow [2024-11-24 01:34:59,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-24 01:34:59,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-24 01:34:59,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 602 transitions. [2024-11-24 01:34:59,227 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6080808080808081 [2024-11-24 01:34:59,227 INFO L175 Difference]: Start difference. First operand has 140 places, 87 transitions, 739 flow. Second operand 15 states and 602 transitions. [2024-11-24 01:34:59,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 257 transitions, 2493 flow [2024-11-24 01:34:59,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 257 transitions, 2418 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-11-24 01:34:59,390 INFO L231 Difference]: Finished difference. Result has 155 places, 104 transitions, 962 flow [2024-11-24 01:34:59,390 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=708, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=962, PETRI_PLACES=155, PETRI_TRANSITIONS=104} [2024-11-24 01:34:59,390 INFO L279 CegarLoopForPetriNet]: 62 programPoint places, 93 predicate places. [2024-11-24 01:34:59,391 INFO L471 AbstractCegarLoop]: Abstraction has has 155 places, 104 transitions, 962 flow [2024-11-24 01:34:59,391 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 32.333333333333336) internal successors, (388), 12 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:34:59,391 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:34:59,391 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 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] [2024-11-24 01:34:59,391 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-11-24 01:34:59,391 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-24 01:34:59,392 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:34:59,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1166447049, now seen corresponding path program 2 times [2024-11-24 01:34:59,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:34:59,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18121348] [2024-11-24 01:34:59,392 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 01:34:59,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:34:59,412 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-24 01:34:59,412 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:34:59,821 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-24 01:34:59,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:34:59,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18121348] [2024-11-24 01:34:59,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18121348] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 01:34:59,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 01:34:59,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-11-24 01:34:59,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39122531] [2024-11-24 01:34:59,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:34:59,821 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-24 01:34:59,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:34:59,822 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-24 01:34:59,822 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-11-24 01:35:00,240 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 66 [2024-11-24 01:35:00,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 104 transitions, 962 flow. Second operand has 12 states, 12 states have (on average 32.333333333333336) internal successors, (388), 12 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:35:00,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:35:00,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 66 [2024-11-24 01:35:00,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:35:06,528 INFO L124 PetriNetUnfolderBase]: 19378/37471 cut-off events. [2024-11-24 01:35:06,528 INFO L125 PetriNetUnfolderBase]: For 134856/134950 co-relation queries the response was YES. [2024-11-24 01:35:06,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129359 conditions, 37471 events. 19378/37471 cut-off events. For 134856/134950 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 309386 event pairs, 15801 based on Foata normal form. 8/37443 useless extension candidates. Maximal degree in co-relation 129206. Up to 25124 conditions per place. [2024-11-24 01:35:06,822 INFO L140 encePairwiseOnDemand]: 52/66 looper letters, 171 selfloop transitions, 38 changer transitions 0/224 dead transitions. [2024-11-24 01:35:06,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 224 transitions, 2135 flow [2024-11-24 01:35:06,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-24 01:35:06,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-24 01:35:06,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 561 transitions. [2024-11-24 01:35:06,824 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-11-24 01:35:06,824 INFO L175 Difference]: Start difference. First operand has 155 places, 104 transitions, 962 flow. Second operand 14 states and 561 transitions. [2024-11-24 01:35:06,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 224 transitions, 2135 flow [2024-11-24 01:35:07,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 224 transitions, 2037 flow, removed 39 selfloop flow, removed 3 redundant places. [2024-11-24 01:35:07,005 INFO L231 Difference]: Finished difference. Result has 175 places, 125 transitions, 1297 flow [2024-11-24 01:35:07,005 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=917, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1297, PETRI_PLACES=175, PETRI_TRANSITIONS=125} [2024-11-24 01:35:07,006 INFO L279 CegarLoopForPetriNet]: 62 programPoint places, 113 predicate places. [2024-11-24 01:35:07,006 INFO L471 AbstractCegarLoop]: Abstraction has has 175 places, 125 transitions, 1297 flow [2024-11-24 01:35:07,006 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 32.333333333333336) internal successors, (388), 12 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:35:07,006 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:35:07,006 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 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] [2024-11-24 01:35:07,006 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-11-24 01:35:07,006 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-24 01:35:07,007 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:35:07,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1848440935, now seen corresponding path program 3 times [2024-11-24 01:35:07,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:35:07,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212390347] [2024-11-24 01:35:07,007 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-24 01:35:07,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:35:07,034 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-11-24 01:35:07,034 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:35:07,416 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-24 01:35:07,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:35:07,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212390347] [2024-11-24 01:35:07,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212390347] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 01:35:07,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 01:35:07,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-11-24 01:35:07,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600173495] [2024-11-24 01:35:07,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:35:07,417 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-24 01:35:07,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:35:07,417 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-24 01:35:07,417 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132