./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/chl-word-trans.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version d790fecc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09f7450-5d4b-47fe-b230-f7bb0971bf52/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09f7450-5d4b-47fe-b230-f7bb0971bf52/bin/uautomizer-verify-aQ6SnzHsRB/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09f7450-5d4b-47fe-b230-f7bb0971bf52/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09f7450-5d4b-47fe-b230-f7bb0971bf52/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-word-trans.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09f7450-5d4b-47fe-b230-f7bb0971bf52/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09f7450-5d4b-47fe-b230-f7bb0971bf52/bin/uautomizer-verify-aQ6SnzHsRB --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9cb2b0cbecf02e8cce2fd890595fb88c3204482a27ce7ac6f4ef6fb92949d747 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 02:32:25,219 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 02:32:25,323 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09f7450-5d4b-47fe-b230-f7bb0971bf52/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-28 02:32:25,330 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 02:32:25,330 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 02:32:25,361 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 02:32:25,362 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 02:32:25,362 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 02:32:25,363 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 02:32:25,363 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 02:32:25,363 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 02:32:25,363 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 02:32:25,363 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 02:32:25,364 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 02:32:25,364 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 02:32:25,364 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 02:32:25,364 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-28 02:32:25,364 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 02:32:25,364 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-28 02:32:25,364 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 02:32:25,364 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-28 02:32:25,365 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-28 02:32:25,365 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-28 02:32:25,365 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 02:32:25,365 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-28 02:32:25,365 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-28 02:32:25,365 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-28 02:32:25,365 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 02:32:25,367 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 02:32:25,367 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 02:32:25,367 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 02:32:25,368 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 02:32:25,368 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 02:32:25,368 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 02:32:25,368 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 02:32:25,368 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 02:32:25,368 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 02:32:25,368 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 02:32:25,368 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 02:32:25,368 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 02:32:25,369 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 02:32:25,369 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-28 02:32:25,369 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-28 02:32:25,369 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 02:32:25,369 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 02:32:25,369 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 02:32:25,369 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 02:32:25,369 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_c09f7450-5d4b-47fe-b230-f7bb0971bf52/bin/uautomizer-verify-aQ6SnzHsRB Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9cb2b0cbecf02e8cce2fd890595fb88c3204482a27ce7ac6f4ef6fb92949d747 [2024-11-28 02:32:25,692 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 02:32:25,704 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 02:32:25,707 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 02:32:25,708 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 02:32:25,710 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 02:32:25,712 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09f7450-5d4b-47fe-b230-f7bb0971bf52/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/weaver/chl-word-trans.wvr.c [2024-11-28 02:32:28,739 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09f7450-5d4b-47fe-b230-f7bb0971bf52/bin/uautomizer-verify-aQ6SnzHsRB/data/40b87d571/2c445988762e4f508152edc7fe384712/FLAG212338a30 [2024-11-28 02:32:29,094 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 02:32:29,094 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09f7450-5d4b-47fe-b230-f7bb0971bf52/sv-benchmarks/c/weaver/chl-word-trans.wvr.c [2024-11-28 02:32:29,108 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09f7450-5d4b-47fe-b230-f7bb0971bf52/bin/uautomizer-verify-aQ6SnzHsRB/data/40b87d571/2c445988762e4f508152edc7fe384712/FLAG212338a30 [2024-11-28 02:32:29,325 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09f7450-5d4b-47fe-b230-f7bb0971bf52/bin/uautomizer-verify-aQ6SnzHsRB/data/40b87d571/2c445988762e4f508152edc7fe384712 [2024-11-28 02:32:29,327 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 02:32:29,329 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 02:32:29,331 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 02:32:29,331 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 02:32:29,336 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 02:32:29,337 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 02:32:29" (1/1) ... [2024-11-28 02:32:29,338 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a75de54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:32:29, skipping insertion in model container [2024-11-28 02:32:29,338 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 02:32:29" (1/1) ... [2024-11-28 02:32:29,364 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 02:32:29,632 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-28 02:32:29,639 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 02:32:29,655 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 02:32:29,709 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 02:32:29,731 INFO L204 MainTranslator]: Completed translation [2024-11-28 02:32:29,732 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:32:29 WrapperNode [2024-11-28 02:32:29,732 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 02:32:29,733 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 02:32:29,733 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 02:32:29,733 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 02:32:29,743 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:32:29" (1/1) ... [2024-11-28 02:32:29,755 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:32:29" (1/1) ... [2024-11-28 02:32:29,788 INFO L138 Inliner]: procedures = 24, calls = 30, calls flagged for inlining = 9, calls inlined = 13, statements flattened = 164 [2024-11-28 02:32:29,789 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 02:32:29,789 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 02:32:29,789 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 02:32:29,789 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 02:32:29,797 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:32:29" (1/1) ... [2024-11-28 02:32:29,798 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:32:29" (1/1) ... [2024-11-28 02:32:29,801 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:32:29" (1/1) ... [2024-11-28 02:32:29,817 INFO L175 MemorySlicer]: Split 17 memory accesses to 2 slices as follows [2, 15]. 88 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2024-11-28 02:32:29,818 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:32:29" (1/1) ... [2024-11-28 02:32:29,818 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:32:29" (1/1) ... [2024-11-28 02:32:29,826 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:32:29" (1/1) ... [2024-11-28 02:32:29,828 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:32:29" (1/1) ... [2024-11-28 02:32:29,832 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:32:29" (1/1) ... [2024-11-28 02:32:29,834 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:32:29" (1/1) ... [2024-11-28 02:32:29,838 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:32:29" (1/1) ... [2024-11-28 02:32:29,841 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 02:32:29,846 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 02:32:29,846 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 02:32:29,846 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 02:32:29,847 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:32:29" (1/1) ... [2024-11-28 02:32:29,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 02:32:29,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09f7450-5d4b-47fe-b230-f7bb0971bf52/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:32:29,884 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09f7450-5d4b-47fe-b230-f7bb0971bf52/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 02:32:29,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09f7450-5d4b-47fe-b230-f7bb0971bf52/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 02:32:29,918 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-28 02:32:29,918 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-28 02:32:29,918 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-28 02:32:29,918 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-28 02:32:29,919 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-28 02:32:29,919 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-28 02:32:29,919 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-28 02:32:29,919 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-28 02:32:29,919 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-28 02:32:29,920 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-28 02:32:29,921 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-28 02:32:29,921 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-28 02:32:29,921 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 02:32:29,921 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 02:32:29,921 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-28 02:32:29,922 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-28 02:32:29,925 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-28 02:32:30,047 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 02:32:30,049 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 02:32:30,689 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-28 02:32:30,689 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 02:32:31,096 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 02:32:31,096 INFO L312 CfgBuilder]: Removed 6 assume(true) statements. [2024-11-28 02:32:31,096 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:32:31 BoogieIcfgContainer [2024-11-28 02:32:31,097 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 02:32:31,100 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 02:32:31,100 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 02:32:31,109 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 02:32:31,109 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 02:32:29" (1/3) ... [2024-11-28 02:32:31,110 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@466ca957 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 02:32:31, skipping insertion in model container [2024-11-28 02:32:31,110 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:32:29" (2/3) ... [2024-11-28 02:32:31,111 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@466ca957 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 02:32:31, skipping insertion in model container [2024-11-28 02:32:31,111 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:32:31" (3/3) ... [2024-11-28 02:32:31,113 INFO L128 eAbstractionObserver]: Analyzing ICFG chl-word-trans.wvr.c [2024-11-28 02:32:31,132 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 02:32:31,133 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG chl-word-trans.wvr.c that has 4 procedures, 85 locations, 1 initial locations, 6 loop locations, and 32 error locations. [2024-11-28 02:32:31,133 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-28 02:32:31,264 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-28 02:32:31,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 94 places, 96 transitions, 213 flow [2024-11-28 02:32:31,379 INFO L124 PetriNetUnfolderBase]: 12/93 cut-off events. [2024-11-28 02:32:31,382 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-28 02:32:31,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106 conditions, 93 events. 12/93 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 300 event pairs, 0 based on Foata normal form. 0/49 useless extension candidates. Maximal degree in co-relation 72. Up to 2 conditions per place. [2024-11-28 02:32:31,389 INFO L82 GeneralOperation]: Start removeDead. Operand has 94 places, 96 transitions, 213 flow [2024-11-28 02:32:31,394 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 90 places, 92 transitions, 202 flow [2024-11-28 02:32:31,404 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 02:32:31,423 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;@2d799984, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 02:32:31,423 INFO L334 AbstractCegarLoop]: Starting to check reachability of 59 error locations. [2024-11-28 02:32:31,429 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-28 02:32:31,429 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-28 02:32:31,429 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-28 02:32:31,430 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:32:31,430 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-28 02:32:31,431 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-28 02:32:31,437 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:32:31,439 INFO L85 PathProgramCache]: Analyzing trace with hash 768148, now seen corresponding path program 1 times [2024-11-28 02:32:31,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:32:31,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479487779] [2024-11-28 02:32:31,451 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:32:31,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:32:31,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:32:31,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:32:31,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:32:31,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479487779] [2024-11-28 02:32:31,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479487779] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:32:31,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:32:31,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-28 02:32:31,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564966164] [2024-11-28 02:32:31,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:32:31,786 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 02:32:31,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:32:31,820 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 02:32:31,821 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 02:32:31,919 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 96 [2024-11-28 02:32:31,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 92 transitions, 202 flow. Second operand has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:32:31,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:32:31,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 96 [2024-11-28 02:32:31,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:32:32,940 INFO L124 PetriNetUnfolderBase]: 2712/4947 cut-off events. [2024-11-28 02:32:32,940 INFO L125 PetriNetUnfolderBase]: For 181/181 co-relation queries the response was YES. [2024-11-28 02:32:32,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8698 conditions, 4947 events. 2712/4947 cut-off events. For 181/181 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 34554 event pairs, 1692 based on Foata normal form. 1/3396 useless extension candidates. Maximal degree in co-relation 8222. Up to 3567 conditions per place. [2024-11-28 02:32:33,004 INFO L140 encePairwiseOnDemand]: 90/96 looper letters, 45 selfloop transitions, 2 changer transitions 0/87 dead transitions. [2024-11-28 02:32:33,004 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 87 transitions, 286 flow [2024-11-28 02:32:33,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 02:32:33,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-28 02:32:33,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 183 transitions. [2024-11-28 02:32:33,025 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6354166666666666 [2024-11-28 02:32:33,027 INFO L175 Difference]: Start difference. First operand has 90 places, 92 transitions, 202 flow. Second operand 3 states and 183 transitions. [2024-11-28 02:32:33,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 87 transitions, 286 flow [2024-11-28 02:32:33,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 87 transitions, 274 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-28 02:32:33,048 INFO L231 Difference]: Finished difference. Result has 81 places, 87 transitions, 184 flow [2024-11-28 02:32:33,051 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=184, PETRI_PLACES=81, PETRI_TRANSITIONS=87} [2024-11-28 02:32:33,056 INFO L279 CegarLoopForPetriNet]: 90 programPoint places, -9 predicate places. [2024-11-28 02:32:33,058 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 87 transitions, 184 flow [2024-11-28 02:32:33,058 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:32:33,059 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:32:33,059 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-28 02:32:33,059 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-28 02:32:33,060 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-28 02:32:33,060 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:32:33,061 INFO L85 PathProgramCache]: Analyzing trace with hash 768149, now seen corresponding path program 1 times [2024-11-28 02:32:33,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:32:33,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016460728] [2024-11-28 02:32:33,061 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:32:33,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:32:33,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:32:33,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:32:33,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:32:33,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016460728] [2024-11-28 02:32:33,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016460728] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:32:33,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:32:33,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 02:32:33,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15160341] [2024-11-28 02:32:33,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:32:33,581 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 02:32:33,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:32:33,583 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 02:32:33,583 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 02:32:33,775 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 96 [2024-11-28 02:32:33,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 87 transitions, 184 flow. Second operand has 4 states, 4 states have (on average 44.75) internal successors, (179), 4 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:32:33,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:32:33,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 96 [2024-11-28 02:32:33,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:32:34,426 INFO L124 PetriNetUnfolderBase]: 2713/4950 cut-off events. [2024-11-28 02:32:34,426 INFO L125 PetriNetUnfolderBase]: For 42/42 co-relation queries the response was YES. [2024-11-28 02:32:34,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8593 conditions, 4950 events. 2713/4950 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 34570 event pairs, 1692 based on Foata normal form. 0/3395 useless extension candidates. Maximal degree in co-relation 8556. Up to 3580 conditions per place. [2024-11-28 02:32:34,468 INFO L140 encePairwiseOnDemand]: 91/96 looper letters, 49 selfloop transitions, 4 changer transitions 0/90 dead transitions. [2024-11-28 02:32:34,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 90 transitions, 296 flow [2024-11-28 02:32:34,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 02:32:34,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 02:32:34,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 230 transitions. [2024-11-28 02:32:34,471 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5989583333333334 [2024-11-28 02:32:34,471 INFO L175 Difference]: Start difference. First operand has 81 places, 87 transitions, 184 flow. Second operand 4 states and 230 transitions. [2024-11-28 02:32:34,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 90 transitions, 296 flow [2024-11-28 02:32:34,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 90 transitions, 292 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-28 02:32:34,476 INFO L231 Difference]: Finished difference. Result has 84 places, 90 transitions, 207 flow [2024-11-28 02:32:34,476 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=207, PETRI_PLACES=84, PETRI_TRANSITIONS=90} [2024-11-28 02:32:34,477 INFO L279 CegarLoopForPetriNet]: 90 programPoint places, -6 predicate places. [2024-11-28 02:32:34,477 INFO L471 AbstractCegarLoop]: Abstraction has has 84 places, 90 transitions, 207 flow [2024-11-28 02:32:34,477 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 44.75) internal successors, (179), 4 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:32:34,477 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:32:34,477 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-28 02:32:34,478 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-28 02:32:34,479 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-28 02:32:34,479 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:32:34,480 INFO L85 PathProgramCache]: Analyzing trace with hash 23815335, now seen corresponding path program 1 times [2024-11-28 02:32:34,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:32:34,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323300732] [2024-11-28 02:32:34,480 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:32:34,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:32:34,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:32:34,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:32:34,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:32:34,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323300732] [2024-11-28 02:32:34,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323300732] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:32:34,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:32:34,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 02:32:34,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709590452] [2024-11-28 02:32:34,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:32:34,861 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 02:32:34,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:32:34,862 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 02:32:34,862 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 02:32:35,044 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 96 [2024-11-28 02:32:35,045 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 90 transitions, 207 flow. Second operand has 5 states, 5 states have (on average 44.8) internal successors, (224), 5 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:32:35,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:32:35,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 96 [2024-11-28 02:32:35,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:32:35,718 INFO L124 PetriNetUnfolderBase]: 2714/4953 cut-off events. [2024-11-28 02:32:35,719 INFO L125 PetriNetUnfolderBase]: For 42/42 co-relation queries the response was YES. [2024-11-28 02:32:35,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8610 conditions, 4953 events. 2714/4953 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 34576 event pairs, 1692 based on Foata normal form. 0/3397 useless extension candidates. Maximal degree in co-relation 8585. Up to 3579 conditions per place. [2024-11-28 02:32:35,772 INFO L140 encePairwiseOnDemand]: 88/96 looper letters, 49 selfloop transitions, 7 changer transitions 0/93 dead transitions. [2024-11-28 02:32:35,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 93 transitions, 325 flow [2024-11-28 02:32:35,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 02:32:35,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 02:32:35,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 277 transitions. [2024-11-28 02:32:35,777 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5770833333333333 [2024-11-28 02:32:35,777 INFO L175 Difference]: Start difference. First operand has 84 places, 90 transitions, 207 flow. Second operand 5 states and 277 transitions. [2024-11-28 02:32:35,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 93 transitions, 325 flow [2024-11-28 02:32:35,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 93 transitions, 322 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-28 02:32:35,783 INFO L231 Difference]: Finished difference. Result has 89 places, 93 transitions, 241 flow [2024-11-28 02:32:35,783 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=241, PETRI_PLACES=89, PETRI_TRANSITIONS=93} [2024-11-28 02:32:35,784 INFO L279 CegarLoopForPetriNet]: 90 programPoint places, -1 predicate places. [2024-11-28 02:32:35,784 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 93 transitions, 241 flow [2024-11-28 02:32:35,784 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 44.8) internal successors, (224), 5 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:32:35,784 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:32:35,784 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-11-28 02:32:35,786 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-28 02:32:35,786 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-28 02:32:35,787 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:32:35,787 INFO L85 PathProgramCache]: Analyzing trace with hash 738277754, now seen corresponding path program 1 times [2024-11-28 02:32:35,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:32:35,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661885247] [2024-11-28 02:32:35,788 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:32:35,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:32:35,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:32:36,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:32:36,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:32:36,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661885247] [2024-11-28 02:32:36,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661885247] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:32:36,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:32:36,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 02:32:36,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757187417] [2024-11-28 02:32:36,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:32:36,172 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 02:32:36,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:32:36,172 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 02:32:36,172 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 02:32:36,418 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 96 [2024-11-28 02:32:36,418 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 93 transitions, 241 flow. Second operand has 5 states, 5 states have (on average 45.0) internal successors, (225), 5 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:32:36,418 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:32:36,418 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 96 [2024-11-28 02:32:36,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:32:37,057 INFO L124 PetriNetUnfolderBase]: 2715/4956 cut-off events. [2024-11-28 02:32:37,058 INFO L125 PetriNetUnfolderBase]: For 45/45 co-relation queries the response was YES. [2024-11-28 02:32:37,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8632 conditions, 4956 events. 2715/4956 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 34639 event pairs, 1692 based on Foata normal form. 0/3401 useless extension candidates. Maximal degree in co-relation 8601. Up to 3582 conditions per place. [2024-11-28 02:32:37,099 INFO L140 encePairwiseOnDemand]: 87/96 looper letters, 50 selfloop transitions, 9 changer transitions 0/96 dead transitions. [2024-11-28 02:32:37,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 96 transitions, 365 flow [2024-11-28 02:32:37,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 02:32:37,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 02:32:37,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 277 transitions. [2024-11-28 02:32:37,101 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5770833333333333 [2024-11-28 02:32:37,102 INFO L175 Difference]: Start difference. First operand has 89 places, 93 transitions, 241 flow. Second operand 5 states and 277 transitions. [2024-11-28 02:32:37,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 96 transitions, 365 flow [2024-11-28 02:32:37,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 96 transitions, 364 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-28 02:32:37,106 INFO L231 Difference]: Finished difference. Result has 94 places, 96 transitions, 283 flow [2024-11-28 02:32:37,106 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=283, PETRI_PLACES=94, PETRI_TRANSITIONS=96} [2024-11-28 02:32:37,107 INFO L279 CegarLoopForPetriNet]: 90 programPoint places, 4 predicate places. [2024-11-28 02:32:37,108 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 96 transitions, 283 flow [2024-11-28 02:32:37,108 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 45.0) internal successors, (225), 5 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:32:37,108 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:32:37,108 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-28 02:32:37,109 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-28 02:32:37,109 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-28 02:32:37,109 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:32:37,109 INFO L85 PathProgramCache]: Analyzing trace with hash 738216485, now seen corresponding path program 1 times [2024-11-28 02:32:37,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:32:37,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999759712] [2024-11-28 02:32:37,109 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:32:37,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:32:37,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:32:37,438 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:32:37,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:32:37,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999759712] [2024-11-28 02:32:37,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999759712] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:32:37,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550700768] [2024-11-28 02:32:37,439 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:32:37,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:32:37,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09f7450-5d4b-47fe-b230-f7bb0971bf52/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:32:37,442 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09f7450-5d4b-47fe-b230-f7bb0971bf52/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:32:37,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09f7450-5d4b-47fe-b230-f7bb0971bf52/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-28 02:32:37,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:32:37,530 INFO L256 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-28 02:32:37,534 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:32:37,622 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-28 02:32:37,810 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:32:37,811 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:32:37,970 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:32:37,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550700768] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:32:37,970 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:32:37,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-28 02:32:37,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845055904] [2024-11-28 02:32:37,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:32:37,971 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-28 02:32:37,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:32:37,971 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-28 02:32:37,972 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-11-28 02:32:38,766 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 96 [2024-11-28 02:32:38,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 96 transitions, 283 flow. Second operand has 11 states, 11 states have (on average 45.36363636363637) internal successors, (499), 11 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:32:38,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:32:38,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 96 [2024-11-28 02:32:38,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:32:39,537 INFO L124 PetriNetUnfolderBase]: 2715/4955 cut-off events. [2024-11-28 02:32:39,538 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2024-11-28 02:32:39,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8650 conditions, 4955 events. 2715/4955 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 34632 event pairs, 1692 based on Foata normal form. 0/3403 useless extension candidates. Maximal degree in co-relation 8616. Up to 3582 conditions per place. [2024-11-28 02:32:39,574 INFO L140 encePairwiseOnDemand]: 91/96 looper letters, 51 selfloop transitions, 7 changer transitions 0/95 dead transitions. [2024-11-28 02:32:39,574 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 95 transitions, 395 flow [2024-11-28 02:32:39,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 02:32:39,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-28 02:32:39,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 317 transitions. [2024-11-28 02:32:39,576 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5503472222222222 [2024-11-28 02:32:39,576 INFO L175 Difference]: Start difference. First operand has 94 places, 96 transitions, 283 flow. Second operand 6 states and 317 transitions. [2024-11-28 02:32:39,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 95 transitions, 395 flow [2024-11-28 02:32:39,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 95 transitions, 388 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-28 02:32:39,579 INFO L231 Difference]: Finished difference. Result has 96 places, 95 transitions, 286 flow [2024-11-28 02:32:39,579 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=286, PETRI_PLACES=96, PETRI_TRANSITIONS=95} [2024-11-28 02:32:39,579 INFO L279 CegarLoopForPetriNet]: 90 programPoint places, 6 predicate places. [2024-11-28 02:32:39,580 INFO L471 AbstractCegarLoop]: Abstraction has has 96 places, 95 transitions, 286 flow [2024-11-28 02:32:39,580 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 45.36363636363637) internal successors, (499), 11 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:32:39,580 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:32:39,580 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-11-28 02:32:39,591 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09f7450-5d4b-47fe-b230-f7bb0971bf52/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-28 02:32:39,784 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09f7450-5d4b-47fe-b230-f7bb0971bf52/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:32:39,785 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-28 02:32:39,785 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:32:39,785 INFO L85 PathProgramCache]: Analyzing trace with hash 1411725274, now seen corresponding path program 1 times [2024-11-28 02:32:39,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:32:39,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526578306] [2024-11-28 02:32:39,785 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:32:39,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:32:39,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:32:40,119 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:32:40,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:32:40,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526578306] [2024-11-28 02:32:40,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526578306] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:32:40,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129577572] [2024-11-28 02:32:40,120 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:32:40,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:32:40,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09f7450-5d4b-47fe-b230-f7bb0971bf52/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:32:40,122 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09f7450-5d4b-47fe-b230-f7bb0971bf52/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:32:40,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09f7450-5d4b-47fe-b230-f7bb0971bf52/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-28 02:32:40,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:32:40,208 INFO L256 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-28 02:32:40,210 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:32:40,230 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-28 02:32:40,495 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:32:40,495 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:32:40,787 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:32:40,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129577572] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:32:40,788 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:32:40,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-28 02:32:40,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517926429] [2024-11-28 02:32:40,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:32:40,788 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-28 02:32:40,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:32:40,789 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-28 02:32:40,789 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-11-28 02:32:42,183 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 96 [2024-11-28 02:32:42,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 95 transitions, 286 flow. Second operand has 13 states, 13 states have (on average 45.30769230769231) internal successors, (589), 13 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:32:42,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:32:42,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 96 [2024-11-28 02:32:42,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:32:43,125 INFO L124 PetriNetUnfolderBase]: 2715/4954 cut-off events. [2024-11-28 02:32:43,126 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2024-11-28 02:32:43,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8650 conditions, 4954 events. 2715/4954 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 34603 event pairs, 1692 based on Foata normal form. 0/3403 useless extension candidates. Maximal degree in co-relation 8612. Up to 3574 conditions per place. [2024-11-28 02:32:43,159 INFO L140 encePairwiseOnDemand]: 88/96 looper letters, 45 selfloop transitions, 12 changer transitions 0/94 dead transitions. [2024-11-28 02:32:43,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 94 transitions, 396 flow [2024-11-28 02:32:43,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 02:32:43,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-28 02:32:43,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 363 transitions. [2024-11-28 02:32:43,165 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5401785714285714 [2024-11-28 02:32:43,165 INFO L175 Difference]: Start difference. First operand has 96 places, 95 transitions, 286 flow. Second operand 7 states and 363 transitions. [2024-11-28 02:32:43,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 94 transitions, 396 flow [2024-11-28 02:32:43,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 94 transitions, 362 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-11-28 02:32:43,170 INFO L231 Difference]: Finished difference. Result has 93 places, 94 transitions, 272 flow [2024-11-28 02:32:43,171 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=272, PETRI_PLACES=93, PETRI_TRANSITIONS=94} [2024-11-28 02:32:43,175 INFO L279 CegarLoopForPetriNet]: 90 programPoint places, 3 predicate places. [2024-11-28 02:32:43,175 INFO L471 AbstractCegarLoop]: Abstraction has has 93 places, 94 transitions, 272 flow [2024-11-28 02:32:43,175 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 45.30769230769231) internal successors, (589), 13 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:32:43,175 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:32:43,175 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-11-28 02:32:43,187 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09f7450-5d4b-47fe-b230-f7bb0971bf52/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-28 02:32:43,376 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09f7450-5d4b-47fe-b230-f7bb0971bf52/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:32:43,376 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-28 02:32:43,377 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:32:43,377 INFO L85 PathProgramCache]: Analyzing trace with hash 815342815, now seen corresponding path program 1 times [2024-11-28 02:32:43,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:32:43,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021393709] [2024-11-28 02:32:43,377 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:32:43,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:32:43,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:32:43,775 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:32:43,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:32:43,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021393709] [2024-11-28 02:32:43,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021393709] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:32:43,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709987625] [2024-11-28 02:32:43,777 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:32:43,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:32:43,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09f7450-5d4b-47fe-b230-f7bb0971bf52/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:32:43,779 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09f7450-5d4b-47fe-b230-f7bb0971bf52/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:32:43,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09f7450-5d4b-47fe-b230-f7bb0971bf52/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-28 02:32:43,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:32:43,865 INFO L256 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-28 02:32:43,867 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:32:43,885 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-28 02:32:44,105 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:32:44,105 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:32:44,302 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:32:44,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709987625] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:32:44,302 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:32:44,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-28 02:32:44,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108678418] [2024-11-28 02:32:44,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:32:44,303 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-28 02:32:44,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:32:44,304 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-28 02:32:44,304 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2024-11-28 02:32:45,413 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 96 [2024-11-28 02:32:45,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 94 transitions, 272 flow. Second operand has 13 states, 13 states have (on average 45.46153846153846) internal successors, (591), 13 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:32:45,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:32:45,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 96 [2024-11-28 02:32:45,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:32:46,353 INFO L124 PetriNetUnfolderBase]: 2717/4959 cut-off events. [2024-11-28 02:32:46,354 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2024-11-28 02:32:46,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8658 conditions, 4959 events. 2717/4959 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 34595 event pairs, 1692 based on Foata normal form. 0/3408 useless extension candidates. Maximal degree in co-relation 8597. Up to 3575 conditions per place. [2024-11-28 02:32:46,390 INFO L140 encePairwiseOnDemand]: 87/96 looper letters, 41 selfloop transitions, 21 changer transitions 0/99 dead transitions. [2024-11-28 02:32:46,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 99 transitions, 418 flow [2024-11-28 02:32:46,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 02:32:46,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-28 02:32:46,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 457 transitions. [2024-11-28 02:32:46,395 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5289351851851852 [2024-11-28 02:32:46,396 INFO L175 Difference]: Start difference. First operand has 93 places, 94 transitions, 272 flow. Second operand 9 states and 457 transitions. [2024-11-28 02:32:46,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 99 transitions, 418 flow [2024-11-28 02:32:46,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 99 transitions, 391 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-11-28 02:32:46,400 INFO L231 Difference]: Finished difference. Result has 95 places, 99 transitions, 309 flow [2024-11-28 02:32:46,401 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=243, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=309, PETRI_PLACES=95, PETRI_TRANSITIONS=99} [2024-11-28 02:32:46,403 INFO L279 CegarLoopForPetriNet]: 90 programPoint places, 5 predicate places. [2024-11-28 02:32:46,403 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 99 transitions, 309 flow [2024-11-28 02:32:46,404 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 45.46153846153846) internal successors, (591), 13 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:32:46,404 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:32:46,404 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:32:46,413 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09f7450-5d4b-47fe-b230-f7bb0971bf52/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-28 02:32:46,604 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09f7450-5d4b-47fe-b230-f7bb0971bf52/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:32:46,605 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-28 02:32:46,605 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:32:46,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1989220042, now seen corresponding path program 1 times [2024-11-28 02:32:46,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:32:46,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773051731] [2024-11-28 02:32:46,606 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:32:46,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:32:46,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:32:46,703 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:32:46,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:32:46,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773051731] [2024-11-28 02:32:46,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773051731] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:32:46,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:32:46,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 02:32:46,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886593593] [2024-11-28 02:32:46,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:32:46,704 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 02:32:46,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:32:46,704 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 02:32:46,705 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-28 02:32:46,761 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 96 [2024-11-28 02:32:46,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 99 transitions, 309 flow. Second operand has 5 states, 5 states have (on average 47.6) internal successors, (238), 5 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:32:46,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:32:46,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 96 [2024-11-28 02:32:46,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:32:47,596 INFO L124 PetriNetUnfolderBase]: 5202/9281 cut-off events. [2024-11-28 02:32:47,596 INFO L125 PetriNetUnfolderBase]: For 86/86 co-relation queries the response was YES. [2024-11-28 02:32:47,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16424 conditions, 9281 events. 5202/9281 cut-off events. For 86/86 co-relation queries the response was YES. Maximal size of possible extension queue 554. Compared 69163 event pairs, 2894 based on Foata normal form. 0/6442 useless extension candidates. Maximal degree in co-relation 9713. Up to 4037 conditions per place. [2024-11-28 02:32:47,652 INFO L140 encePairwiseOnDemand]: 86/96 looper letters, 126 selfloop transitions, 9 changer transitions 0/171 dead transitions. [2024-11-28 02:32:47,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 171 transitions, 789 flow [2024-11-28 02:32:47,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 02:32:47,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-28 02:32:47,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 397 transitions. [2024-11-28 02:32:47,654 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6892361111111112 [2024-11-28 02:32:47,654 INFO L175 Difference]: Start difference. First operand has 95 places, 99 transitions, 309 flow. Second operand 6 states and 397 transitions. [2024-11-28 02:32:47,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 171 transitions, 789 flow [2024-11-28 02:32:47,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 171 transitions, 717 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-11-28 02:32:47,658 INFO L231 Difference]: Finished difference. Result has 97 places, 105 transitions, 331 flow [2024-11-28 02:32:47,658 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=331, PETRI_PLACES=97, PETRI_TRANSITIONS=105} [2024-11-28 02:32:47,659 INFO L279 CegarLoopForPetriNet]: 90 programPoint places, 7 predicate places. [2024-11-28 02:32:47,659 INFO L471 AbstractCegarLoop]: Abstraction has has 97 places, 105 transitions, 331 flow [2024-11-28 02:32:47,659 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 47.6) internal successors, (238), 5 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:32:47,659 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:32:47,660 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:32:47,660 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-28 02:32:47,660 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-28 02:32:47,660 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:32:47,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1079525921, now seen corresponding path program 1 times [2024-11-28 02:32:47,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:32:47,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873684183] [2024-11-28 02:32:47,661 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:32:47,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:32:47,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:32:47,746 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:32:47,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:32:47,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873684183] [2024-11-28 02:32:47,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873684183] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:32:47,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:32:47,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 02:32:47,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105463935] [2024-11-28 02:32:47,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:32:47,747 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 02:32:47,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:32:47,748 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 02:32:47,748 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-28 02:32:47,792 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 96 [2024-11-28 02:32:47,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 105 transitions, 331 flow. Second operand has 5 states, 5 states have (on average 48.0) internal successors, (240), 5 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:32:47,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:32:47,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 96 [2024-11-28 02:32:47,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:32:48,919 INFO L124 PetriNetUnfolderBase]: 9282/16997 cut-off events. [2024-11-28 02:32:48,919 INFO L125 PetriNetUnfolderBase]: For 1957/1957 co-relation queries the response was YES. [2024-11-28 02:32:48,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31205 conditions, 16997 events. 9282/16997 cut-off events. For 1957/1957 co-relation queries the response was YES. Maximal size of possible extension queue 954. Compared 142659 event pairs, 5328 based on Foata normal form. 0/12164 useless extension candidates. Maximal degree in co-relation 21703. Up to 7332 conditions per place. [2024-11-28 02:32:49,008 INFO L140 encePairwiseOnDemand]: 88/96 looper letters, 128 selfloop transitions, 12 changer transitions 0/176 dead transitions. [2024-11-28 02:32:49,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 176 transitions, 815 flow [2024-11-28 02:32:49,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 02:32:49,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-28 02:32:49,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 390 transitions. [2024-11-28 02:32:49,010 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6770833333333334 [2024-11-28 02:32:49,010 INFO L175 Difference]: Start difference. First operand has 97 places, 105 transitions, 331 flow. Second operand 6 states and 390 transitions. [2024-11-28 02:32:49,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 176 transitions, 815 flow [2024-11-28 02:32:49,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 176 transitions, 810 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-28 02:32:49,022 INFO L231 Difference]: Finished difference. Result has 103 places, 111 transitions, 407 flow [2024-11-28 02:32:49,022 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=326, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=407, PETRI_PLACES=103, PETRI_TRANSITIONS=111} [2024-11-28 02:32:49,027 INFO L279 CegarLoopForPetriNet]: 90 programPoint places, 13 predicate places. [2024-11-28 02:32:49,027 INFO L471 AbstractCegarLoop]: Abstraction has has 103 places, 111 transitions, 407 flow [2024-11-28 02:32:49,027 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 48.0) internal successors, (240), 5 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:32:49,027 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:32:49,028 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:32:49,028 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-28 02:32:49,028 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-28 02:32:49,028 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:32:49,028 INFO L85 PathProgramCache]: Analyzing trace with hash 76954714, now seen corresponding path program 1 times [2024-11-28 02:32:49,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:32:49,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635214521] [2024-11-28 02:32:49,029 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:32:49,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:32:49,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:32:49,138 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:32:49,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:32:49,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635214521] [2024-11-28 02:32:49,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635214521] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:32:49,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:32:49,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 02:32:49,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707518639] [2024-11-28 02:32:49,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:32:49,140 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 02:32:49,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:32:49,140 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 02:32:49,140 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-28 02:32:49,186 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 96 [2024-11-28 02:32:49,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 111 transitions, 407 flow. Second operand has 5 states, 5 states have (on average 48.0) internal successors, (240), 5 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:32:49,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:32:49,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 96 [2024-11-28 02:32:49,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:32:50,629 INFO L124 PetriNetUnfolderBase]: 8538/15802 cut-off events. [2024-11-28 02:32:50,629 INFO L125 PetriNetUnfolderBase]: For 3252/3252 co-relation queries the response was YES. [2024-11-28 02:32:50,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30381 conditions, 15802 events. 8538/15802 cut-off events. For 3252/3252 co-relation queries the response was YES. Maximal size of possible extension queue 853. Compared 131962 event pairs, 5008 based on Foata normal form. 98/12073 useless extension candidates. Maximal degree in co-relation 21360. Up to 6936 conditions per place. [2024-11-28 02:32:50,708 INFO L140 encePairwiseOnDemand]: 88/96 looper letters, 119 selfloop transitions, 14 changer transitions 0/169 dead transitions. [2024-11-28 02:32:50,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 169 transitions, 829 flow [2024-11-28 02:32:50,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 02:32:50,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-28 02:32:50,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 385 transitions. [2024-11-28 02:32:50,711 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6684027777777778 [2024-11-28 02:32:50,711 INFO L175 Difference]: Start difference. First operand has 103 places, 111 transitions, 407 flow. Second operand 6 states and 385 transitions. [2024-11-28 02:32:50,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 169 transitions, 829 flow [2024-11-28 02:32:50,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 169 transitions, 824 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-28 02:32:50,726 INFO L231 Difference]: Finished difference. Result has 109 places, 115 transitions, 472 flow [2024-11-28 02:32:50,726 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=402, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=472, PETRI_PLACES=109, PETRI_TRANSITIONS=115} [2024-11-28 02:32:50,727 INFO L279 CegarLoopForPetriNet]: 90 programPoint places, 19 predicate places. [2024-11-28 02:32:50,727 INFO L471 AbstractCegarLoop]: Abstraction has has 109 places, 115 transitions, 472 flow [2024-11-28 02:32:50,728 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 48.0) internal successors, (240), 5 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:32:50,728 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:32:50,728 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:32:50,728 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-28 02:32:50,728 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-28 02:32:50,729 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:32:50,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1150318534, now seen corresponding path program 1 times [2024-11-28 02:32:50,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:32:50,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308129539] [2024-11-28 02:32:50,729 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:32:50,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:32:50,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:32:50,853 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:32:50,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:32:50,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308129539] [2024-11-28 02:32:50,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308129539] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:32:50,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:32:50,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 02:32:50,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747385180] [2024-11-28 02:32:50,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:32:50,854 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 02:32:50,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:32:50,855 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 02:32:50,855 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-28 02:32:50,909 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 96 [2024-11-28 02:32:50,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 115 transitions, 472 flow. Second operand has 5 states, 5 states have (on average 48.4) internal successors, (242), 5 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:32:50,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:32:50,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 96 [2024-11-28 02:32:50,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:32:52,144 INFO L124 PetriNetUnfolderBase]: 7928/13742 cut-off events. [2024-11-28 02:32:52,144 INFO L125 PetriNetUnfolderBase]: For 6669/6669 co-relation queries the response was YES. [2024-11-28 02:32:52,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28730 conditions, 13742 events. 7928/13742 cut-off events. For 6669/6669 co-relation queries the response was YES. Maximal size of possible extension queue 654. Compared 102101 event pairs, 4896 based on Foata normal form. 0/10660 useless extension candidates. Maximal degree in co-relation 21127. Up to 6598 conditions per place. [2024-11-28 02:32:52,208 INFO L140 encePairwiseOnDemand]: 86/96 looper letters, 132 selfloop transitions, 11 changer transitions 0/179 dead transitions. [2024-11-28 02:32:52,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 179 transitions, 972 flow [2024-11-28 02:32:52,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 02:32:52,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-28 02:32:52,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 389 transitions. [2024-11-28 02:32:52,210 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6753472222222222 [2024-11-28 02:32:52,210 INFO L175 Difference]: Start difference. First operand has 109 places, 115 transitions, 472 flow. Second operand 6 states and 389 transitions. [2024-11-28 02:32:52,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 179 transitions, 972 flow [2024-11-28 02:32:52,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 179 transitions, 954 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-28 02:32:52,223 INFO L231 Difference]: Finished difference. Result has 113 places, 117 transitions, 498 flow [2024-11-28 02:32:52,223 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=456, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=498, PETRI_PLACES=113, PETRI_TRANSITIONS=117} [2024-11-28 02:32:52,224 INFO L279 CegarLoopForPetriNet]: 90 programPoint places, 23 predicate places. [2024-11-28 02:32:52,224 INFO L471 AbstractCegarLoop]: Abstraction has has 113 places, 117 transitions, 498 flow [2024-11-28 02:32:52,224 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 48.4) internal successors, (242), 5 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:32:52,224 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:32:52,224 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:32:52,225 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-28 02:32:52,225 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-28 02:32:52,225 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:32:52,225 INFO L85 PathProgramCache]: Analyzing trace with hash -458851508, now seen corresponding path program 1 times [2024-11-28 02:32:52,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:32:52,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600297094] [2024-11-28 02:32:52,226 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:32:52,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:32:52,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:32:52,337 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 02:32:52,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:32:52,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600297094] [2024-11-28 02:32:52,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600297094] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:32:52,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:32:52,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 02:32:52,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363463180] [2024-11-28 02:32:52,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:32:52,342 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 02:32:52,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:32:52,342 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 02:32:52,342 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-28 02:32:52,389 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 96 [2024-11-28 02:32:52,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 117 transitions, 498 flow. Second operand has 5 states, 5 states have (on average 48.4) internal successors, (242), 5 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:32:52,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:32:52,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 96 [2024-11-28 02:32:52,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:32:54,186 INFO L124 PetriNetUnfolderBase]: 14396/26018 cut-off events. [2024-11-28 02:32:54,187 INFO L125 PetriNetUnfolderBase]: For 13520/13520 co-relation queries the response was YES. [2024-11-28 02:32:54,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56190 conditions, 26018 events. 14396/26018 cut-off events. For 13520/13520 co-relation queries the response was YES. Maximal size of possible extension queue 1127. Compared 222723 event pairs, 8752 based on Foata normal form. 209/21450 useless extension candidates. Maximal degree in co-relation 40255. Up to 10927 conditions per place. [2024-11-28 02:32:54,448 INFO L140 encePairwiseOnDemand]: 90/96 looper letters, 140 selfloop transitions, 15 changer transitions 0/191 dead transitions. [2024-11-28 02:32:54,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 191 transitions, 1096 flow [2024-11-28 02:32:54,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 02:32:54,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 02:32:54,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 338 transitions. [2024-11-28 02:32:54,450 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7041666666666667 [2024-11-28 02:32:54,450 INFO L175 Difference]: Start difference. First operand has 113 places, 117 transitions, 498 flow. Second operand 5 states and 338 transitions. [2024-11-28 02:32:54,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 191 transitions, 1096 flow [2024-11-28 02:32:54,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 191 transitions, 1084 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-28 02:32:54,479 INFO L231 Difference]: Finished difference. Result has 116 places, 121 transitions, 558 flow [2024-11-28 02:32:54,479 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=486, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=558, PETRI_PLACES=116, PETRI_TRANSITIONS=121} [2024-11-28 02:32:54,480 INFO L279 CegarLoopForPetriNet]: 90 programPoint places, 26 predicate places. [2024-11-28 02:32:54,480 INFO L471 AbstractCegarLoop]: Abstraction has has 116 places, 121 transitions, 558 flow [2024-11-28 02:32:54,480 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 48.4) internal successors, (242), 5 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:32:54,481 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:32:54,481 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:32:54,481 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-28 02:32:54,481 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-28 02:32:54,481 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:32:54,482 INFO L85 PathProgramCache]: Analyzing trace with hash 1985760519, now seen corresponding path program 1 times [2024-11-28 02:32:54,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:32:54,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860481940] [2024-11-28 02:32:54,482 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:32:54,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:32:54,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:32:54,732 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 02:32:54,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:32:54,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860481940] [2024-11-28 02:32:54,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860481940] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:32:54,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:32:54,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 02:32:54,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83935741] [2024-11-28 02:32:54,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:32:54,733 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 02:32:54,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:32:54,735 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 02:32:54,735 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 02:32:54,859 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 96 [2024-11-28 02:32:54,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 121 transitions, 558 flow. Second operand has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:32:54,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:32:54,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 96 [2024-11-28 02:32:54,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:32:57,002 INFO L124 PetriNetUnfolderBase]: 17199/29566 cut-off events. [2024-11-28 02:32:57,002 INFO L125 PetriNetUnfolderBase]: For 22873/22873 co-relation queries the response was YES. [2024-11-28 02:32:57,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67626 conditions, 29566 events. 17199/29566 cut-off events. For 22873/22873 co-relation queries the response was YES. Maximal size of possible extension queue 1188. Compared 240735 event pairs, 12689 based on Foata normal form. 0/25687 useless extension candidates. Maximal degree in co-relation 47315. Up to 23638 conditions per place. [2024-11-28 02:32:57,138 INFO L140 encePairwiseOnDemand]: 89/96 looper letters, 78 selfloop transitions, 10 changer transitions 0/117 dead transitions. [2024-11-28 02:32:57,138 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 117 transitions, 726 flow [2024-11-28 02:32:57,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 02:32:57,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 02:32:57,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 235 transitions. [2024-11-28 02:32:57,140 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4895833333333333 [2024-11-28 02:32:57,140 INFO L175 Difference]: Start difference. First operand has 116 places, 121 transitions, 558 flow. Second operand 5 states and 235 transitions. [2024-11-28 02:32:57,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 117 transitions, 726 flow [2024-11-28 02:32:57,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 117 transitions, 719 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-28 02:32:57,189 INFO L231 Difference]: Finished difference. Result has 115 places, 117 transitions, 563 flow [2024-11-28 02:32:57,190 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=543, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=563, PETRI_PLACES=115, PETRI_TRANSITIONS=117} [2024-11-28 02:32:57,190 INFO L279 CegarLoopForPetriNet]: 90 programPoint places, 25 predicate places. [2024-11-28 02:32:57,191 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 117 transitions, 563 flow [2024-11-28 02:32:57,191 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:32:57,191 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:32:57,191 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:32:57,191 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-28 02:32:57,191 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-28 02:32:57,192 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:32:57,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1985760520, now seen corresponding path program 1 times [2024-11-28 02:32:57,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:32:57,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737478389] [2024-11-28 02:32:57,192 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:32:57,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:32:57,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:32:57,715 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 02:32:57,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:32:57,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737478389] [2024-11-28 02:32:57,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737478389] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:32:57,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478330594] [2024-11-28 02:32:57,716 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:32:57,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:32:57,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09f7450-5d4b-47fe-b230-f7bb0971bf52/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:32:57,718 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09f7450-5d4b-47fe-b230-f7bb0971bf52/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:32:57,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09f7450-5d4b-47fe-b230-f7bb0971bf52/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-28 02:32:57,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:32:57,815 INFO L256 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-28 02:32:57,817 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:32:57,828 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-28 02:32:57,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 02:32:57,891 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-28 02:32:57,925 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-28 02:32:57,925 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2024-11-28 02:32:57,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 02:32:57,979 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-28 02:32:57,991 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-28 02:32:57,991 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-28 02:32:58,060 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 02:32:58,060 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:32:58,358 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 100 treesize of output 96 [2024-11-28 02:32:58,589 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 02:32:58,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478330594] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:32:58,589 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:32:58,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2024-11-28 02:32:58,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497971742] [2024-11-28 02:32:58,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:32:58,589 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-28 02:32:58,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:32:58,590 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-28 02:32:58,590 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2024-11-28 02:33:00,138 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 96 [2024-11-28 02:33:00,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 117 transitions, 563 flow. Second operand has 16 states, 16 states have (on average 36.0625) internal successors, (577), 16 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:33:00,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:33:00,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 96 [2024-11-28 02:33:00,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:33:04,121 INFO L124 PetriNetUnfolderBase]: 22858/38187 cut-off events. [2024-11-28 02:33:04,121 INFO L125 PetriNetUnfolderBase]: For 25427/25427 co-relation queries the response was YES. [2024-11-28 02:33:04,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86991 conditions, 38187 events. 22858/38187 cut-off events. For 25427/25427 co-relation queries the response was YES. Maximal size of possible extension queue 1190. Compared 305004 event pairs, 10483 based on Foata normal form. 0/32577 useless extension candidates. Maximal degree in co-relation 63291. Up to 12148 conditions per place. [2024-11-28 02:33:04,338 INFO L140 encePairwiseOnDemand]: 83/96 looper letters, 171 selfloop transitions, 28 changer transitions 0/226 dead transitions. [2024-11-28 02:33:04,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 226 transitions, 1350 flow [2024-11-28 02:33:04,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 02:33:04,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-28 02:33:04,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 471 transitions. [2024-11-28 02:33:04,340 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5451388888888888 [2024-11-28 02:33:04,340 INFO L175 Difference]: Start difference. First operand has 115 places, 117 transitions, 563 flow. Second operand 9 states and 471 transitions. [2024-11-28 02:33:04,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 226 transitions, 1350 flow [2024-11-28 02:33:04,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 226 transitions, 1334 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-28 02:33:04,432 INFO L231 Difference]: Finished difference. Result has 121 places, 122 transitions, 650 flow [2024-11-28 02:33:04,432 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=547, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=650, PETRI_PLACES=121, PETRI_TRANSITIONS=122} [2024-11-28 02:33:04,433 INFO L279 CegarLoopForPetriNet]: 90 programPoint places, 31 predicate places. [2024-11-28 02:33:04,433 INFO L471 AbstractCegarLoop]: Abstraction has has 121 places, 122 transitions, 650 flow [2024-11-28 02:33:04,433 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 36.0625) internal successors, (577), 16 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:33:04,433 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:33:04,433 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:33:04,443 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09f7450-5d4b-47fe-b230-f7bb0971bf52/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-28 02:33:04,634 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09f7450-5d4b-47fe-b230-f7bb0971bf52/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:33:04,634 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-28 02:33:04,634 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:33:04,634 INFO L85 PathProgramCache]: Analyzing trace with hash 1429034723, now seen corresponding path program 1 times [2024-11-28 02:33:04,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:33:04,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358884654] [2024-11-28 02:33:04,635 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:33:04,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:33:04,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:33:04,847 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:33:04,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:33:04,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358884654] [2024-11-28 02:33:04,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358884654] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:33:04,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186145359] [2024-11-28 02:33:04,848 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:33:04,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:33:04,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09f7450-5d4b-47fe-b230-f7bb0971bf52/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:33:04,850 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09f7450-5d4b-47fe-b230-f7bb0971bf52/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:33:04,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09f7450-5d4b-47fe-b230-f7bb0971bf52/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-28 02:33:04,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:33:04,948 INFO L256 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-28 02:33:04,949 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:33:04,960 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-28 02:33:05,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 02:33:05,015 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-28 02:33:05,023 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-28 02:33:05,023 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-28 02:33:05,087 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:33:05,088 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:33:05,197 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 52 treesize of output 48 [2024-11-28 02:33:05,270 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:33:05,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186145359] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:33:05,270 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:33:05,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-11-28 02:33:05,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884848487] [2024-11-28 02:33:05,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:33:05,271 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-28 02:33:05,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:33:05,271 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-28 02:33:05,271 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-11-28 02:33:06,630 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 96 [2024-11-28 02:33:06,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 122 transitions, 650 flow. Second operand has 13 states, 13 states have (on average 43.07692307692308) internal successors, (560), 13 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:33:06,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:33:06,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 96 [2024-11-28 02:33:06,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:33:09,390 INFO L124 PetriNetUnfolderBase]: 18420/30463 cut-off events. [2024-11-28 02:33:09,390 INFO L125 PetriNetUnfolderBase]: For 30128/30128 co-relation queries the response was YES. [2024-11-28 02:33:09,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73792 conditions, 30463 events. 18420/30463 cut-off events. For 30128/30128 co-relation queries the response was YES. Maximal size of possible extension queue 1014. Compared 233664 event pairs, 9229 based on Foata normal form. 0/27094 useless extension candidates. Maximal degree in co-relation 54632. Up to 9558 conditions per place. [2024-11-28 02:33:09,605 INFO L140 encePairwiseOnDemand]: 83/96 looper letters, 153 selfloop transitions, 32 changer transitions 0/215 dead transitions. [2024-11-28 02:33:09,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 215 transitions, 1312 flow [2024-11-28 02:33:09,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 02:33:09,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-28 02:33:09,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 520 transitions. [2024-11-28 02:33:09,608 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6018518518518519 [2024-11-28 02:33:09,608 INFO L175 Difference]: Start difference. First operand has 121 places, 122 transitions, 650 flow. Second operand 9 states and 520 transitions. [2024-11-28 02:33:09,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 215 transitions, 1312 flow [2024-11-28 02:33:09,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 215 transitions, 1260 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-11-28 02:33:09,696 INFO L231 Difference]: Finished difference. Result has 126 places, 126 transitions, 711 flow [2024-11-28 02:33:09,697 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=598, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=711, PETRI_PLACES=126, PETRI_TRANSITIONS=126} [2024-11-28 02:33:09,697 INFO L279 CegarLoopForPetriNet]: 90 programPoint places, 36 predicate places. [2024-11-28 02:33:09,697 INFO L471 AbstractCegarLoop]: Abstraction has has 126 places, 126 transitions, 711 flow [2024-11-28 02:33:09,698 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 43.07692307692308) internal successors, (560), 13 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:33:09,698 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:33:09,698 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:33:09,708 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09f7450-5d4b-47fe-b230-f7bb0971bf52/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-28 02:33:09,901 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09f7450-5d4b-47fe-b230-f7bb0971bf52/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-28 02:33:09,902 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-28 02:33:09,902 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:33:09,902 INFO L85 PathProgramCache]: Analyzing trace with hash 1429034722, now seen corresponding path program 1 times [2024-11-28 02:33:09,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:33:09,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101429595] [2024-11-28 02:33:09,902 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:33:09,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:33:09,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:33:10,024 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:33:10,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:33:10,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101429595] [2024-11-28 02:33:10,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101429595] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:33:10,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:33:10,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 02:33:10,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458243856] [2024-11-28 02:33:10,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:33:10,025 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 02:33:10,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:33:10,026 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 02:33:10,026 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 02:33:10,145 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 96 [2024-11-28 02:33:10,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 126 transitions, 711 flow. Second operand has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:33:10,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:33:10,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 96 [2024-11-28 02:33:10,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:33:12,887 INFO L124 PetriNetUnfolderBase]: 19535/33142 cut-off events. [2024-11-28 02:33:12,887 INFO L125 PetriNetUnfolderBase]: For 39336/39336 co-relation queries the response was YES. [2024-11-28 02:33:12,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82036 conditions, 33142 events. 19535/33142 cut-off events. For 39336/39336 co-relation queries the response was YES. Maximal size of possible extension queue 1111. Compared 264091 event pairs, 14065 based on Foata normal form. 394/29960 useless extension candidates. Maximal degree in co-relation 59382. Up to 26618 conditions per place. [2024-11-28 02:33:13,117 INFO L140 encePairwiseOnDemand]: 89/96 looper letters, 81 selfloop transitions, 16 changer transitions 0/122 dead transitions. [2024-11-28 02:33:13,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 122 transitions, 897 flow [2024-11-28 02:33:13,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 02:33:13,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 02:33:13,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 239 transitions. [2024-11-28 02:33:13,118 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4979166666666667 [2024-11-28 02:33:13,118 INFO L175 Difference]: Start difference. First operand has 126 places, 126 transitions, 711 flow. Second operand 5 states and 239 transitions. [2024-11-28 02:33:13,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 122 transitions, 897 flow [2024-11-28 02:33:13,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 122 transitions, 841 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-11-28 02:33:13,173 INFO L231 Difference]: Finished difference. Result has 120 places, 122 transitions, 679 flow [2024-11-28 02:33:13,173 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=647, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=679, PETRI_PLACES=120, PETRI_TRANSITIONS=122} [2024-11-28 02:33:13,174 INFO L279 CegarLoopForPetriNet]: 90 programPoint places, 30 predicate places. [2024-11-28 02:33:13,174 INFO L471 AbstractCegarLoop]: Abstraction has has 120 places, 122 transitions, 679 flow [2024-11-28 02:33:13,174 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:33:13,174 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:33:13,174 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:33:13,174 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-28 02:33:13,174 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-28 02:33:13,175 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:33:13,175 INFO L85 PathProgramCache]: Analyzing trace with hash -830611534, now seen corresponding path program 1 times [2024-11-28 02:33:13,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:33:13,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051416017] [2024-11-28 02:33:13,175 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:33:13,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:33:13,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:33:13,450 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 02:33:13,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:33:13,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051416017] [2024-11-28 02:33:13,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051416017] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:33:13,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590590500] [2024-11-28 02:33:13,451 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:33:13,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:33:13,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09f7450-5d4b-47fe-b230-f7bb0971bf52/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:33:13,453 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09f7450-5d4b-47fe-b230-f7bb0971bf52/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:33:13,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09f7450-5d4b-47fe-b230-f7bb0971bf52/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-28 02:33:13,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:33:13,561 INFO L256 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-28 02:33:13,564 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:33:13,574 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-28 02:33:13,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 02:33:13,639 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-28 02:33:13,648 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-28 02:33:13,649 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-28 02:33:13,739 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 02:33:13,739 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:33:13,902 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 52 treesize of output 48 [2024-11-28 02:33:13,995 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 02:33:13,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590590500] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:33:13,995 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:33:13,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-11-28 02:33:13,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642478689] [2024-11-28 02:33:13,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:33:13,996 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-28 02:33:13,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:33:13,998 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-28 02:33:13,998 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-11-28 02:33:18,111 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 02:33:22,195 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 02:33:26,209 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 02:33:30,265 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 02:33:34,309 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 02:33:38,442 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 02:33:42,488 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 02:33:46,501 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 02:33:50,513 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 02:33:54,624 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 02:33:58,701 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 02:34:02,776 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 02:34:06,818 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 02:34:06,926 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 96 [2024-11-28 02:34:06,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 122 transitions, 679 flow. Second operand has 13 states, 13 states have (on average 30.53846153846154) internal successors, (397), 13 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:34:06,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:34:06,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 96 [2024-11-28 02:34:06,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:34:11,057 INFO L124 PetriNetUnfolderBase]: 32980/50423 cut-off events. [2024-11-28 02:34:11,057 INFO L125 PetriNetUnfolderBase]: For 62513/63325 co-relation queries the response was YES. [2024-11-28 02:34:11,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126306 conditions, 50423 events. 32980/50423 cut-off events. For 62513/63325 co-relation queries the response was YES. Maximal size of possible extension queue 1460. Compared 369316 event pairs, 12914 based on Foata normal form. 0/44488 useless extension candidates. Maximal degree in co-relation 80028. Up to 15460 conditions per place. [2024-11-28 02:34:11,336 INFO L140 encePairwiseOnDemand]: 83/96 looper letters, 179 selfloop transitions, 32 changer transitions 0/231 dead transitions. [2024-11-28 02:34:11,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 231 transitions, 1507 flow [2024-11-28 02:34:11,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 02:34:11,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-28 02:34:11,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 418 transitions. [2024-11-28 02:34:11,339 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4837962962962963 [2024-11-28 02:34:11,339 INFO L175 Difference]: Start difference. First operand has 120 places, 122 transitions, 679 flow. Second operand 9 states and 418 transitions. [2024-11-28 02:34:11,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 231 transitions, 1507 flow [2024-11-28 02:34:11,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 231 transitions, 1487 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-28 02:34:11,405 INFO L231 Difference]: Finished difference. Result has 126 places, 125 transitions, 762 flow [2024-11-28 02:34:11,405 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=657, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=762, PETRI_PLACES=126, PETRI_TRANSITIONS=125} [2024-11-28 02:34:11,406 INFO L279 CegarLoopForPetriNet]: 90 programPoint places, 36 predicate places. [2024-11-28 02:34:11,406 INFO L471 AbstractCegarLoop]: Abstraction has has 126 places, 125 transitions, 762 flow [2024-11-28 02:34:11,406 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 30.53846153846154) internal successors, (397), 13 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:34:11,406 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:34:11,406 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:34:11,413 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09f7450-5d4b-47fe-b230-f7bb0971bf52/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-28 02:34:11,606 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09f7450-5d4b-47fe-b230-f7bb0971bf52/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-28 02:34:11,607 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-28 02:34:11,607 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:34:11,607 INFO L85 PathProgramCache]: Analyzing trace with hash -800627253, now seen corresponding path program 1 times [2024-11-28 02:34:11,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:34:11,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452735948] [2024-11-28 02:34:11,607 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:34:11,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:34:11,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:34:11,862 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:34:11,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:34:11,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452735948] [2024-11-28 02:34:11,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452735948] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:34:11,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:34:11,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 02:34:11,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519419318] [2024-11-28 02:34:11,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:34:11,864 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 02:34:11,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:34:11,866 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 02:34:11,866 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-28 02:34:11,900 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 96 [2024-11-28 02:34:11,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 125 transitions, 762 flow. Second operand has 5 states, 5 states have (on average 48.8) internal successors, (244), 5 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:34:11,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:34:11,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 96 [2024-11-28 02:34:11,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:34:14,979 INFO L124 PetriNetUnfolderBase]: 20238/32947 cut-off events. [2024-11-28 02:34:14,979 INFO L125 PetriNetUnfolderBase]: For 50824/50979 co-relation queries the response was YES. [2024-11-28 02:34:15,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86897 conditions, 32947 events. 20238/32947 cut-off events. For 50824/50979 co-relation queries the response was YES. Maximal size of possible extension queue 998. Compared 245215 event pairs, 12848 based on Foata normal form. 218/29653 useless extension candidates. Maximal degree in co-relation 63549. Up to 18225 conditions per place. [2024-11-28 02:34:15,156 INFO L140 encePairwiseOnDemand]: 90/96 looper letters, 151 selfloop transitions, 15 changer transitions 0/194 dead transitions. [2024-11-28 02:34:15,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 194 transitions, 1464 flow [2024-11-28 02:34:15,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 02:34:15,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 02:34:15,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 331 transitions. [2024-11-28 02:34:15,158 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6895833333333333 [2024-11-28 02:34:15,158 INFO L175 Difference]: Start difference. First operand has 126 places, 125 transitions, 762 flow. Second operand 5 states and 331 transitions. [2024-11-28 02:34:15,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 194 transitions, 1464 flow [2024-11-28 02:34:15,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 194 transitions, 1402 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-11-28 02:34:15,236 INFO L231 Difference]: Finished difference. Result has 126 places, 129 transitions, 776 flow [2024-11-28 02:34:15,237 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=704, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=776, PETRI_PLACES=126, PETRI_TRANSITIONS=129} [2024-11-28 02:34:15,237 INFO L279 CegarLoopForPetriNet]: 90 programPoint places, 36 predicate places. [2024-11-28 02:34:15,237 INFO L471 AbstractCegarLoop]: Abstraction has has 126 places, 129 transitions, 776 flow [2024-11-28 02:34:15,237 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 48.8) internal successors, (244), 5 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:34:15,238 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:34:15,240 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:34:15,240 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-28 02:34:15,240 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-28 02:34:15,241 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:34:15,241 INFO L85 PathProgramCache]: Analyzing trace with hash 20846990, now seen corresponding path program 1 times [2024-11-28 02:34:15,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:34:15,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645900988] [2024-11-28 02:34:15,241 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:34:15,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:34:15,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:34:15,445 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 02:34:15,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:34:15,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645900988] [2024-11-28 02:34:15,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645900988] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:34:15,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298485734] [2024-11-28 02:34:15,446 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:34:15,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:34:15,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09f7450-5d4b-47fe-b230-f7bb0971bf52/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:34:15,448 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09f7450-5d4b-47fe-b230-f7bb0971bf52/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:34:15,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09f7450-5d4b-47fe-b230-f7bb0971bf52/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-28 02:34:15,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:34:15,550 INFO L256 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-28 02:34:15,551 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:34:15,655 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 02:34:15,655 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:34:15,720 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 [2024-11-28 02:34:15,731 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 02:34:15,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298485734] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:34:15,731 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:34:15,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2024-11-28 02:34:15,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954472757] [2024-11-28 02:34:15,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:34:15,732 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-28 02:34:15,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:34:15,733 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-28 02:34:15,733 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-28 02:34:16,427 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 96 [2024-11-28 02:34:16,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 129 transitions, 776 flow. Second operand has 11 states, 11 states have (on average 46.36363636363637) internal successors, (510), 11 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:34:16,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:34:16,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 96 [2024-11-28 02:34:16,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:34:19,491 INFO L124 PetriNetUnfolderBase]: 21544/34291 cut-off events. [2024-11-28 02:34:19,491 INFO L125 PetriNetUnfolderBase]: For 51566/51774 co-relation queries the response was YES. [2024-11-28 02:34:19,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92306 conditions, 34291 events. 21544/34291 cut-off events. For 51566/51774 co-relation queries the response was YES. Maximal size of possible extension queue 961. Compared 248607 event pairs, 10533 based on Foata normal form. 0/32020 useless extension candidates. Maximal degree in co-relation 70353. Up to 11045 conditions per place. [2024-11-28 02:34:19,683 INFO L140 encePairwiseOnDemand]: 83/96 looper letters, 172 selfloop transitions, 32 changer transitions 0/230 dead transitions. [2024-11-28 02:34:19,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 230 transitions, 1672 flow [2024-11-28 02:34:19,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 02:34:19,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-28 02:34:19,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 451 transitions. [2024-11-28 02:34:19,685 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6711309523809523 [2024-11-28 02:34:19,685 INFO L175 Difference]: Start difference. First operand has 126 places, 129 transitions, 776 flow. Second operand 7 states and 451 transitions. [2024-11-28 02:34:19,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 230 transitions, 1672 flow [2024-11-28 02:34:19,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 230 transitions, 1654 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-28 02:34:19,760 INFO L231 Difference]: Finished difference. Result has 131 places, 129 transitions, 847 flow [2024-11-28 02:34:19,760 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=756, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=847, PETRI_PLACES=131, PETRI_TRANSITIONS=129} [2024-11-28 02:34:19,760 INFO L279 CegarLoopForPetriNet]: 90 programPoint places, 41 predicate places. [2024-11-28 02:34:19,760 INFO L471 AbstractCegarLoop]: Abstraction has has 131 places, 129 transitions, 847 flow [2024-11-28 02:34:19,760 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 46.36363636363637) internal successors, (510), 11 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:34:19,760 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:34:19,761 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:34:19,766 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09f7450-5d4b-47fe-b230-f7bb0971bf52/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-28 02:34:19,961 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09f7450-5d4b-47fe-b230-f7bb0971bf52/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:34:19,961 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-28 02:34:19,962 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:34:19,962 INFO L85 PathProgramCache]: Analyzing trace with hash 20846989, now seen corresponding path program 1 times [2024-11-28 02:34:19,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:34:19,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048490016] [2024-11-28 02:34:19,962 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:34:19,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:34:19,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:34:20,033 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 02:34:20,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:34:20,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048490016] [2024-11-28 02:34:20,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048490016] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:34:20,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:34:20,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 02:34:20,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673086541] [2024-11-28 02:34:20,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:34:20,034 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 02:34:20,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:34:20,035 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 02:34:20,035 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 02:34:20,117 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 96 [2024-11-28 02:34:20,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 129 transitions, 847 flow. Second operand has 4 states, 4 states have (on average 41.5) internal successors, (166), 4 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:34:20,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:34:20,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 96 [2024-11-28 02:34:20,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:34:23,417 INFO L124 PetriNetUnfolderBase]: 21906/34719 cut-off events. [2024-11-28 02:34:23,417 INFO L125 PetriNetUnfolderBase]: For 66508/66812 co-relation queries the response was YES. [2024-11-28 02:34:23,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98665 conditions, 34719 events. 21906/34719 cut-off events. For 66508/66812 co-relation queries the response was YES. Maximal size of possible extension queue 947. Compared 248437 event pairs, 15768 based on Foata normal form. 492/33603 useless extension candidates. Maximal degree in co-relation 72061. Up to 29754 conditions per place. [2024-11-28 02:34:23,655 INFO L140 encePairwiseOnDemand]: 90/96 looper letters, 90 selfloop transitions, 13 changer transitions 0/125 dead transitions. [2024-11-28 02:34:23,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 125 transitions, 1045 flow [2024-11-28 02:34:23,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 02:34:23,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 02:34:23,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 205 transitions. [2024-11-28 02:34:23,656 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5338541666666666 [2024-11-28 02:34:23,656 INFO L175 Difference]: Start difference. First operand has 131 places, 129 transitions, 847 flow. Second operand 4 states and 205 transitions. [2024-11-28 02:34:23,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 125 transitions, 1045 flow [2024-11-28 02:34:23,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 125 transitions, 990 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-11-28 02:34:23,738 INFO L231 Difference]: Finished difference. Result has 125 places, 125 transitions, 810 flow [2024-11-28 02:34:23,738 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=784, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=810, PETRI_PLACES=125, PETRI_TRANSITIONS=125} [2024-11-28 02:34:23,738 INFO L279 CegarLoopForPetriNet]: 90 programPoint places, 35 predicate places. [2024-11-28 02:34:23,739 INFO L471 AbstractCegarLoop]: Abstraction has has 125 places, 125 transitions, 810 flow [2024-11-28 02:34:23,739 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.5) internal successors, (166), 4 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:34:23,739 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:34:23,739 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:34:23,739 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-11-28 02:34:23,739 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-28 02:34:23,739 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:34:23,740 INFO L85 PathProgramCache]: Analyzing trace with hash 658340366, now seen corresponding path program 1 times [2024-11-28 02:34:23,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:34:23,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369702877] [2024-11-28 02:34:23,740 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:34:23,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:34:23,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:34:23,844 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:34:23,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:34:23,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369702877] [2024-11-28 02:34:23,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369702877] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:34:23,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243362226] [2024-11-28 02:34:23,845 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:34:23,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:34:23,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09f7450-5d4b-47fe-b230-f7bb0971bf52/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:34:23,848 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09f7450-5d4b-47fe-b230-f7bb0971bf52/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:34:23,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09f7450-5d4b-47fe-b230-f7bb0971bf52/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-28 02:34:23,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:34:23,953 INFO L256 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 02:34:23,954 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:34:24,065 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 02:34:24,065 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:34:24,188 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 02:34:24,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243362226] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:34:24,189 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:34:24,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 16 [2024-11-28 02:34:24,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022056058] [2024-11-28 02:34:24,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:34:24,190 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-28 02:34:24,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:34:24,192 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-28 02:34:24,192 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2024-11-28 02:34:24,474 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 96 [2024-11-28 02:34:24,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 125 transitions, 810 flow. Second operand has 16 states, 16 states have (on average 48.25) internal successors, (772), 16 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:34:24,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:34:24,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 96 [2024-11-28 02:34:24,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:34:32,667 INFO L124 PetriNetUnfolderBase]: 52601/81521 cut-off events. [2024-11-28 02:34:32,667 INFO L125 PetriNetUnfolderBase]: For 152788/153786 co-relation queries the response was YES. [2024-11-28 02:34:32,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 231781 conditions, 81521 events. 52601/81521 cut-off events. For 152788/153786 co-relation queries the response was YES. Maximal size of possible extension queue 2351. Compared 643507 event pairs, 22579 based on Foata normal form. 792/77326 useless extension candidates. Maximal degree in co-relation 181424. Up to 14608 conditions per place. [2024-11-28 02:34:33,187 INFO L140 encePairwiseOnDemand]: 82/96 looper letters, 426 selfloop transitions, 80 changer transitions 0/530 dead transitions. [2024-11-28 02:34:33,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 530 transitions, 4053 flow [2024-11-28 02:34:33,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-28 02:34:33,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-11-28 02:34:33,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1690 transitions. [2024-11-28 02:34:33,193 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6070402298850575 [2024-11-28 02:34:33,193 INFO L175 Difference]: Start difference. First operand has 125 places, 125 transitions, 810 flow. Second operand 29 states and 1690 transitions. [2024-11-28 02:34:33,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 530 transitions, 4053 flow [2024-11-28 02:34:33,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 530 transitions, 4024 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-28 02:34:33,615 INFO L231 Difference]: Finished difference. Result has 159 places, 185 transitions, 1508 flow [2024-11-28 02:34:33,615 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=796, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=1508, PETRI_PLACES=159, PETRI_TRANSITIONS=185} [2024-11-28 02:34:33,615 INFO L279 CegarLoopForPetriNet]: 90 programPoint places, 69 predicate places. [2024-11-28 02:34:33,615 INFO L471 AbstractCegarLoop]: Abstraction has has 159 places, 185 transitions, 1508 flow [2024-11-28 02:34:33,616 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 48.25) internal successors, (772), 16 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:34:33,616 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:34:33,616 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:34:33,623 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09f7450-5d4b-47fe-b230-f7bb0971bf52/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-28 02:34:33,816 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c09f7450-5d4b-47fe-b230-f7bb0971bf52/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-28 02:34:33,816 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-28 02:34:33,817 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:34:33,817 INFO L85 PathProgramCache]: Analyzing trace with hash -935135184, now seen corresponding path program 1 times [2024-11-28 02:34:33,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:34:33,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078707111] [2024-11-28 02:34:33,817 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:34:33,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:34:33,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat