./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/unroll-cond-2.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_b09575e4-a9b8-479f-8119-87740fcb368f/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b09575e4-a9b8-479f-8119-87740fcb368f/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_b09575e4-a9b8-479f-8119-87740fcb368f/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b09575e4-a9b8-479f-8119-87740fcb368f/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/unroll-cond-2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b09575e4-a9b8-479f-8119-87740fcb368f/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_b09575e4-a9b8-479f-8119-87740fcb368f/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 4f5c6e2b4939ff0e3b5a44ab7f8c3e5d18f7e9fd12beb8fad487ea501e8fa48b --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-27 20:09:10,499 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-27 20:09:10,621 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b09575e4-a9b8-479f-8119-87740fcb368f/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-27 20:09:10,628 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-27 20:09:10,628 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-27 20:09:10,677 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-27 20:09:10,678 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-27 20:09:10,678 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-27 20:09:10,679 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-27 20:09:10,680 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-27 20:09:10,680 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-27 20:09:10,680 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-27 20:09:10,681 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-27 20:09:10,681 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-27 20:09:10,681 INFO L153 SettingsManager]: * Use SBE=true [2024-11-27 20:09:10,681 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-27 20:09:10,681 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-27 20:09:10,681 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-27 20:09:10,684 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-27 20:09:10,684 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-27 20:09:10,684 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-27 20:09:10,684 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-27 20:09:10,684 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-27 20:09:10,684 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-27 20:09:10,684 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-27 20:09:10,684 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-27 20:09:10,684 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-27 20:09:10,685 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-27 20:09:10,685 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-27 20:09:10,685 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-27 20:09:10,685 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 20:09:10,685 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 20:09:10,685 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 20:09:10,685 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 20:09:10,685 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-27 20:09:10,685 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 20:09:10,686 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 20:09:10,686 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 20:09:10,686 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 20:09:10,686 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-27 20:09:10,686 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-27 20:09:10,686 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-27 20:09:10,686 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-27 20:09:10,686 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-27 20:09:10,686 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-27 20:09:10,686 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-27 20:09:10,687 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-27 20:09:10,687 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_b09575e4-a9b8-479f-8119-87740fcb368f/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 -> 4f5c6e2b4939ff0e3b5a44ab7f8c3e5d18f7e9fd12beb8fad487ea501e8fa48b [2024-11-27 20:09:11,059 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-27 20:09:11,076 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-27 20:09:11,080 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-27 20:09:11,082 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-27 20:09:11,084 INFO L274 PluginConnector]: CDTParser initialized [2024-11-27 20:09:11,087 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b09575e4-a9b8-479f-8119-87740fcb368f/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/weaver/unroll-cond-2.wvr.c [2024-11-27 20:09:14,554 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b09575e4-a9b8-479f-8119-87740fcb368f/bin/uautomizer-verify-aQ6SnzHsRB/data/cee653012/ded9fff8f1864c13956776f4c9106443/FLAGbb2fa0722 [2024-11-27 20:09:14,894 INFO L384 CDTParser]: Found 1 translation units. [2024-11-27 20:09:14,896 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b09575e4-a9b8-479f-8119-87740fcb368f/sv-benchmarks/c/weaver/unroll-cond-2.wvr.c [2024-11-27 20:09:14,917 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b09575e4-a9b8-479f-8119-87740fcb368f/bin/uautomizer-verify-aQ6SnzHsRB/data/cee653012/ded9fff8f1864c13956776f4c9106443/FLAGbb2fa0722 [2024-11-27 20:09:14,960 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b09575e4-a9b8-479f-8119-87740fcb368f/bin/uautomizer-verify-aQ6SnzHsRB/data/cee653012/ded9fff8f1864c13956776f4c9106443 [2024-11-27 20:09:14,965 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-27 20:09:14,967 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-27 20:09:14,969 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-27 20:09:14,969 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-27 20:09:14,976 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-27 20:09:14,978 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 08:09:14" (1/1) ... [2024-11-27 20:09:14,981 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@608d515 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:09:14, skipping insertion in model container [2024-11-27 20:09:14,982 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 08:09:14" (1/1) ... [2024-11-27 20:09:15,008 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-27 20:09:15,245 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-27 20:09:15,251 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 20:09:15,274 INFO L200 MainTranslator]: Completed pre-run [2024-11-27 20:09:15,300 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 20:09:15,319 INFO L204 MainTranslator]: Completed translation [2024-11-27 20:09:15,320 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:09:15 WrapperNode [2024-11-27 20:09:15,320 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-27 20:09:15,322 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-27 20:09:15,322 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-27 20:09:15,322 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-27 20:09:15,331 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:09:15" (1/1) ... [2024-11-27 20:09:15,340 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:09:15" (1/1) ... [2024-11-27 20:09:15,379 INFO L138 Inliner]: procedures = 23, calls = 24, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 133 [2024-11-27 20:09:15,380 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-27 20:09:15,384 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-27 20:09:15,384 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-27 20:09:15,384 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-27 20:09:15,397 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:09:15" (1/1) ... [2024-11-27 20:09:15,398 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:09:15" (1/1) ... [2024-11-27 20:09:15,401 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:09:15" (1/1) ... [2024-11-27 20:09:15,433 INFO L175 MemorySlicer]: Split 7 memory accesses to 2 slices as follows [2, 5]. 71 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-11-27 20:09:15,433 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:09:15" (1/1) ... [2024-11-27 20:09:15,433 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:09:15" (1/1) ... [2024-11-27 20:09:15,441 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:09:15" (1/1) ... [2024-11-27 20:09:15,442 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:09:15" (1/1) ... [2024-11-27 20:09:15,447 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:09:15" (1/1) ... [2024-11-27 20:09:15,448 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:09:15" (1/1) ... [2024-11-27 20:09:15,450 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:09:15" (1/1) ... [2024-11-27 20:09:15,452 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-27 20:09:15,453 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-27 20:09:15,454 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-27 20:09:15,454 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-27 20:09:15,455 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:09:15" (1/1) ... [2024-11-27 20:09:15,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 20:09:15,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b09575e4-a9b8-479f-8119-87740fcb368f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:09:15,495 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b09575e4-a9b8-479f-8119-87740fcb368f/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-27 20:09:15,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b09575e4-a9b8-479f-8119-87740fcb368f/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-27 20:09:15,530 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-27 20:09:15,530 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-27 20:09:15,530 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-27 20:09:15,530 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-27 20:09:15,533 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-27 20:09:15,534 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-27 20:09:15,534 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-27 20:09:15,534 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-27 20:09:15,534 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-27 20:09:15,534 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-27 20:09:15,534 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-27 20:09:15,534 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-27 20:09:15,534 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-27 20:09:15,534 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-27 20:09:15,536 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-27 20:09:15,634 INFO L234 CfgBuilder]: Building ICFG [2024-11-27 20:09:15,636 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-27 20:09:15,974 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-27 20:09:15,974 INFO L283 CfgBuilder]: Performing block encoding [2024-11-27 20:09:16,269 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-27 20:09:16,270 INFO L312 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-27 20:09:16,270 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 08:09:16 BoogieIcfgContainer [2024-11-27 20:09:16,270 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-27 20:09:16,298 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-27 20:09:16,298 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-27 20:09:16,304 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-27 20:09:16,304 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.11 08:09:14" (1/3) ... [2024-11-27 20:09:16,305 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75bc9a57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 08:09:16, skipping insertion in model container [2024-11-27 20:09:16,305 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:09:15" (2/3) ... [2024-11-27 20:09:16,307 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75bc9a57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 08:09:16, skipping insertion in model container [2024-11-27 20:09:16,307 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 08:09:16" (3/3) ... [2024-11-27 20:09:16,309 INFO L128 eAbstractionObserver]: Analyzing ICFG unroll-cond-2.wvr.c [2024-11-27 20:09:16,330 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-27 20:09:16,331 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG unroll-cond-2.wvr.c that has 3 procedures, 37 locations, 1 initial locations, 3 loop locations, and 12 error locations. [2024-11-27 20:09:16,331 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-27 20:09:16,410 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-27 20:09:16,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 43 places, 40 transitions, 94 flow [2024-11-27 20:09:16,497 INFO L124 PetriNetUnfolderBase]: 4/38 cut-off events. [2024-11-27 20:09:16,500 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-27 20:09:16,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47 conditions, 38 events. 4/38 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 75 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 26. Up to 2 conditions per place. [2024-11-27 20:09:16,510 INFO L82 GeneralOperation]: Start removeDead. Operand has 43 places, 40 transitions, 94 flow [2024-11-27 20:09:16,515 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 40 places, 37 transitions, 86 flow [2024-11-27 20:09:16,522 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-27 20:09:16,536 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;@42e4ab5e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-27 20:09:16,536 INFO L334 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2024-11-27 20:09:16,540 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-27 20:09:16,541 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-27 20:09:16,541 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-27 20:09:16,541 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:09:16,542 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-27 20:09:16,542 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 20:09:16,553 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:09:16,553 INFO L85 PathProgramCache]: Analyzing trace with hash 467532, now seen corresponding path program 1 times [2024-11-27 20:09:16,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:09:16,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135345799] [2024-11-27 20:09:16,564 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:09:16,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:09:16,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:09:16,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:09:16,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:09:16,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135345799] [2024-11-27 20:09:16,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135345799] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:09:16,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:09:16,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-27 20:09:16,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941293169] [2024-11-27 20:09:16,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:09:16,950 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-27 20:09:16,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:09:16,987 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-27 20:09:16,988 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-27 20:09:17,028 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-11-27 20:09:17,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 37 transitions, 86 flow. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:09:17,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:09:17,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-11-27 20:09:17,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:09:17,274 INFO L124 PetriNetUnfolderBase]: 110/249 cut-off events. [2024-11-27 20:09:17,275 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2024-11-27 20:09:17,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 458 conditions, 249 events. 110/249 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1076 event pairs, 75 based on Foata normal form. 1/198 useless extension candidates. Maximal degree in co-relation 396. Up to 185 conditions per place. [2024-11-27 20:09:17,282 INFO L140 encePairwiseOnDemand]: 36/40 looper letters, 21 selfloop transitions, 2 changer transitions 0/34 dead transitions. [2024-11-27 20:09:17,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 34 transitions, 126 flow [2024-11-27 20:09:17,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-27 20:09:17,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-27 20:09:17,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 67 transitions. [2024-11-27 20:09:17,309 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5583333333333333 [2024-11-27 20:09:17,313 INFO L175 Difference]: Start difference. First operand has 40 places, 37 transitions, 86 flow. Second operand 3 states and 67 transitions. [2024-11-27 20:09:17,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 34 transitions, 126 flow [2024-11-27 20:09:17,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 34 transitions, 118 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-27 20:09:17,325 INFO L231 Difference]: Finished difference. Result has 35 places, 34 transitions, 76 flow [2024-11-27 20:09:17,329 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=76, PETRI_PLACES=35, PETRI_TRANSITIONS=34} [2024-11-27 20:09:17,336 INFO L279 CegarLoopForPetriNet]: 40 programPoint places, -5 predicate places. [2024-11-27 20:09:17,337 INFO L471 AbstractCegarLoop]: Abstraction has has 35 places, 34 transitions, 76 flow [2024-11-27 20:09:17,337 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:09:17,337 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:09:17,337 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-27 20:09:17,338 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-27 20:09:17,338 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 20:09:17,340 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:09:17,341 INFO L85 PathProgramCache]: Analyzing trace with hash 467533, now seen corresponding path program 1 times [2024-11-27 20:09:17,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:09:17,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417783340] [2024-11-27 20:09:17,341 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:09:17,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:09:17,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:09:17,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:09:17,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:09:17,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417783340] [2024-11-27 20:09:17,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417783340] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:09:17,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:09:17,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-27 20:09:17,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839859540] [2024-11-27 20:09:17,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:09:17,852 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 20:09:17,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:09:17,853 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 20:09:17,853 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-27 20:09:17,910 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-11-27 20:09:17,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 34 transitions, 76 flow. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:09:17,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:09:17,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-11-27 20:09:17,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:09:18,191 INFO L124 PetriNetUnfolderBase]: 111/252 cut-off events. [2024-11-27 20:09:18,192 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-11-27 20:09:18,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 454 conditions, 252 events. 111/252 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1085 event pairs, 75 based on Foata normal form. 0/200 useless extension candidates. Maximal degree in co-relation 432. Up to 190 conditions per place. [2024-11-27 20:09:18,198 INFO L140 encePairwiseOnDemand]: 36/40 looper letters, 24 selfloop transitions, 3 changer transitions 0/37 dead transitions. [2024-11-27 20:09:18,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 37 transitions, 138 flow [2024-11-27 20:09:18,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-27 20:09:18,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-27 20:09:18,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 70 transitions. [2024-11-27 20:09:18,200 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-11-27 20:09:18,200 INFO L175 Difference]: Start difference. First operand has 35 places, 34 transitions, 76 flow. Second operand 3 states and 70 transitions. [2024-11-27 20:09:18,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 37 transitions, 138 flow [2024-11-27 20:09:18,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 37 transitions, 132 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-27 20:09:18,205 INFO L231 Difference]: Finished difference. Result has 36 places, 36 transitions, 91 flow [2024-11-27 20:09:18,205 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=91, PETRI_PLACES=36, PETRI_TRANSITIONS=36} [2024-11-27 20:09:18,207 INFO L279 CegarLoopForPetriNet]: 40 programPoint places, -4 predicate places. [2024-11-27 20:09:18,207 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 36 transitions, 91 flow [2024-11-27 20:09:18,207 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:09:18,208 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:09:18,208 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-27 20:09:18,208 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-27 20:09:18,208 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 20:09:18,210 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:09:18,210 INFO L85 PathProgramCache]: Analyzing trace with hash 449313154, now seen corresponding path program 1 times [2024-11-27 20:09:18,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:09:18,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624492810] [2024-11-27 20:09:18,211 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:09:18,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:09:18,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:09:18,786 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:09:18,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:09:18,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624492810] [2024-11-27 20:09:18,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624492810] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:09:18,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59430237] [2024-11-27 20:09:18,786 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:09:18,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:09:18,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b09575e4-a9b8-479f-8119-87740fcb368f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:09:18,792 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b09575e4-a9b8-479f-8119-87740fcb368f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:09:18,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b09575e4-a9b8-479f-8119-87740fcb368f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-27 20:09:18,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:09:18,907 INFO L256 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-27 20:09:18,913 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:09:19,038 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 [2024-11-27 20:09:19,335 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:09:19,335 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:09:19,599 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:09:19,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59430237] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:09:19,600 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 20:09:19,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-27 20:09:19,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103215392] [2024-11-27 20:09:19,603 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 20:09:19,603 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-27 20:09:19,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:09:19,604 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-27 20:09:19,604 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-11-27 20:09:19,866 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-11-27 20:09:19,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 36 transitions, 91 flow. Second operand has 11 states, 11 states have (on average 15.363636363636363) internal successors, (169), 11 states have internal predecessors, (169), 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) [2024-11-27 20:09:19,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:09:19,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-11-27 20:09:19,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:09:20,329 INFO L124 PetriNetUnfolderBase]: 111/251 cut-off events. [2024-11-27 20:09:20,330 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-11-27 20:09:20,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 457 conditions, 251 events. 111/251 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1080 event pairs, 75 based on Foata normal form. 0/200 useless extension candidates. Maximal degree in co-relation 432. Up to 186 conditions per place. [2024-11-27 20:09:20,336 INFO L140 encePairwiseOnDemand]: 35/40 looper letters, 20 selfloop transitions, 6 changer transitions 0/36 dead transitions. [2024-11-27 20:09:20,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 36 transitions, 141 flow [2024-11-27 20:09:20,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 20:09:20,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-27 20:09:20,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 97 transitions. [2024-11-27 20:09:20,342 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.485 [2024-11-27 20:09:20,342 INFO L175 Difference]: Start difference. First operand has 36 places, 36 transitions, 91 flow. Second operand 5 states and 97 transitions. [2024-11-27 20:09:20,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 36 transitions, 141 flow [2024-11-27 20:09:20,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 36 transitions, 138 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-27 20:09:20,346 INFO L231 Difference]: Finished difference. Result has 39 places, 36 transitions, 104 flow [2024-11-27 20:09:20,347 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=104, PETRI_PLACES=39, PETRI_TRANSITIONS=36} [2024-11-27 20:09:20,348 INFO L279 CegarLoopForPetriNet]: 40 programPoint places, -1 predicate places. [2024-11-27 20:09:20,349 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 36 transitions, 104 flow [2024-11-27 20:09:20,349 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 15.363636363636363) internal successors, (169), 11 states have internal predecessors, (169), 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) [2024-11-27 20:09:20,349 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:09:20,350 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-27 20:09:20,363 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b09575e4-a9b8-479f-8119-87740fcb368f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-27 20:09:20,551 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b09575e4-a9b8-479f-8119-87740fcb368f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:09:20,552 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 20:09:20,552 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:09:20,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1045988391, now seen corresponding path program 1 times [2024-11-27 20:09:20,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:09:20,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930929974] [2024-11-27 20:09:20,553 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:09:20,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:09:20,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:09:20,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:09:20,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:09:20,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930929974] [2024-11-27 20:09:20,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930929974] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:09:20,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:09:20,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-27 20:09:20,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640350037] [2024-11-27 20:09:20,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:09:20,715 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 20:09:20,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:09:20,716 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 20:09:20,716 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-27 20:09:20,752 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-11-27 20:09:20,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 36 transitions, 104 flow. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 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) [2024-11-27 20:09:20,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:09:20,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-11-27 20:09:20,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:09:20,885 INFO L124 PetriNetUnfolderBase]: 111/225 cut-off events. [2024-11-27 20:09:20,885 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-27 20:09:20,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 439 conditions, 225 events. 111/225 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 826 event pairs, 75 based on Foata normal form. 0/200 useless extension candidates. Maximal degree in co-relation 414. Up to 185 conditions per place. [2024-11-27 20:09:20,888 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 23 selfloop transitions, 3 changer transitions 0/32 dead transitions. [2024-11-27 20:09:20,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 32 transitions, 148 flow [2024-11-27 20:09:20,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 20:09:20,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-27 20:09:20,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 67 transitions. [2024-11-27 20:09:20,893 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.41875 [2024-11-27 20:09:20,894 INFO L175 Difference]: Start difference. First operand has 39 places, 36 transitions, 104 flow. Second operand 4 states and 67 transitions. [2024-11-27 20:09:20,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 32 transitions, 148 flow [2024-11-27 20:09:20,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 32 transitions, 135 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-11-27 20:09:20,900 INFO L231 Difference]: Finished difference. Result has 35 places, 32 transitions, 89 flow [2024-11-27 20:09:20,900 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=83, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=89, PETRI_PLACES=35, PETRI_TRANSITIONS=32} [2024-11-27 20:09:20,901 INFO L279 CegarLoopForPetriNet]: 40 programPoint places, -5 predicate places. [2024-11-27 20:09:20,901 INFO L471 AbstractCegarLoop]: Abstraction has has 35 places, 32 transitions, 89 flow [2024-11-27 20:09:20,901 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 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) [2024-11-27 20:09:20,902 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:09:20,902 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-27 20:09:20,902 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-27 20:09:20,902 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 20:09:20,903 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:09:20,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1045988392, now seen corresponding path program 1 times [2024-11-27 20:09:20,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:09:20,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245767108] [2024-11-27 20:09:20,903 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:09:20,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:09:20,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:09:21,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:09:21,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:09:21,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245767108] [2024-11-27 20:09:21,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245767108] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:09:21,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:09:21,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-27 20:09:21,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313528909] [2024-11-27 20:09:21,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:09:21,071 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-27 20:09:21,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:09:21,072 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-27 20:09:21,072 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-27 20:09:21,077 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-11-27 20:09:21,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 32 transitions, 89 flow. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 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) [2024-11-27 20:09:21,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:09:21,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-11-27 20:09:21,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:09:21,205 INFO L124 PetriNetUnfolderBase]: 110/224 cut-off events. [2024-11-27 20:09:21,206 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-11-27 20:09:21,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 431 conditions, 224 events. 110/224 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 820 event pairs, 75 based on Foata normal form. 1/200 useless extension candidates. Maximal degree in co-relation 406. Up to 188 conditions per place. [2024-11-27 20:09:21,212 INFO L140 encePairwiseOnDemand]: 37/40 looper letters, 23 selfloop transitions, 2 changer transitions 0/31 dead transitions. [2024-11-27 20:09:21,212 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 31 transitions, 134 flow [2024-11-27 20:09:21,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-27 20:09:21,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-27 20:09:21,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 71 transitions. [2024-11-27 20:09:21,215 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5916666666666667 [2024-11-27 20:09:21,216 INFO L175 Difference]: Start difference. First operand has 35 places, 32 transitions, 89 flow. Second operand 3 states and 71 transitions. [2024-11-27 20:09:21,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 31 transitions, 134 flow [2024-11-27 20:09:21,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 31 transitions, 131 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-27 20:09:21,219 INFO L231 Difference]: Finished difference. Result has 35 places, 31 transitions, 85 flow [2024-11-27 20:09:21,220 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=81, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=85, PETRI_PLACES=35, PETRI_TRANSITIONS=31} [2024-11-27 20:09:21,220 INFO L279 CegarLoopForPetriNet]: 40 programPoint places, -5 predicate places. [2024-11-27 20:09:21,222 INFO L471 AbstractCegarLoop]: Abstraction has has 35 places, 31 transitions, 85 flow [2024-11-27 20:09:21,223 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 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) [2024-11-27 20:09:21,223 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:09:21,223 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:09:21,223 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-27 20:09:21,223 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 20:09:21,224 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:09:21,224 INFO L85 PathProgramCache]: Analyzing trace with hash -1922276141, now seen corresponding path program 1 times [2024-11-27 20:09:21,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:09:21,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980290330] [2024-11-27 20:09:21,224 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:09:21,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:09:21,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:09:21,603 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:09:21,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:09:21,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980290330] [2024-11-27 20:09:21,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980290330] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:09:21,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685232828] [2024-11-27 20:09:21,604 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:09:21,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:09:21,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b09575e4-a9b8-479f-8119-87740fcb368f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:09:21,607 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b09575e4-a9b8-479f-8119-87740fcb368f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:09:21,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b09575e4-a9b8-479f-8119-87740fcb368f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-27 20:09:21,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:09:21,733 INFO L256 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-27 20:09:21,734 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:09:21,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:09:21,867 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:09:21,976 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2024-11-27 20:09:22,018 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:09:22,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685232828] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:09:22,019 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 20:09:22,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2024-11-27 20:09:22,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177814350] [2024-11-27 20:09:22,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 20:09:22,019 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-27 20:09:22,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:09:22,020 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-27 20:09:22,020 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-11-27 20:09:22,295 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-11-27 20:09:22,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 31 transitions, 85 flow. Second operand has 10 states, 10 states have (on average 16.0) internal successors, (160), 10 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) [2024-11-27 20:09:22,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:09:22,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-11-27 20:09:22,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:09:22,631 INFO L124 PetriNetUnfolderBase]: 231/426 cut-off events. [2024-11-27 20:09:22,631 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-11-27 20:09:22,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 841 conditions, 426 events. 231/426 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 1804 event pairs, 82 based on Foata normal form. 0/355 useless extension candidates. Maximal degree in co-relation 826. Up to 220 conditions per place. [2024-11-27 20:09:22,635 INFO L140 encePairwiseOnDemand]: 35/40 looper letters, 39 selfloop transitions, 4 changer transitions 0/48 dead transitions. [2024-11-27 20:09:22,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 48 transitions, 208 flow [2024-11-27 20:09:22,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 20:09:22,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-27 20:09:22,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 114 transitions. [2024-11-27 20:09:22,637 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.57 [2024-11-27 20:09:22,637 INFO L175 Difference]: Start difference. First operand has 35 places, 31 transitions, 85 flow. Second operand 5 states and 114 transitions. [2024-11-27 20:09:22,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 48 transitions, 208 flow [2024-11-27 20:09:22,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 48 transitions, 204 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-27 20:09:22,640 INFO L231 Difference]: Finished difference. Result has 38 places, 32 transitions, 97 flow [2024-11-27 20:09:22,640 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=81, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=97, PETRI_PLACES=38, PETRI_TRANSITIONS=32} [2024-11-27 20:09:22,641 INFO L279 CegarLoopForPetriNet]: 40 programPoint places, -2 predicate places. [2024-11-27 20:09:22,641 INFO L471 AbstractCegarLoop]: Abstraction has has 38 places, 32 transitions, 97 flow [2024-11-27 20:09:22,641 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 16.0) internal successors, (160), 10 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) [2024-11-27 20:09:22,642 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:09:22,642 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:09:22,653 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b09575e4-a9b8-479f-8119-87740fcb368f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-27 20:09:22,842 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b09575e4-a9b8-479f-8119-87740fcb368f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:09:22,843 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 20:09:22,843 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:09:22,843 INFO L85 PathProgramCache]: Analyzing trace with hash -471419049, now seen corresponding path program 1 times [2024-11-27 20:09:22,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:09:22,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149468581] [2024-11-27 20:09:22,844 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:09:22,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:09:22,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:09:23,125 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:09:23,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:09:23,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149468581] [2024-11-27 20:09:23,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149468581] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:09:23,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651334144] [2024-11-27 20:09:23,125 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:09:23,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:09:23,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b09575e4-a9b8-479f-8119-87740fcb368f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:09:23,128 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b09575e4-a9b8-479f-8119-87740fcb368f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:09:23,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b09575e4-a9b8-479f-8119-87740fcb368f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-27 20:09:23,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:09:23,215 INFO L256 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-27 20:09:23,217 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:09:23,439 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:09:23,440 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:09:23,530 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 36 treesize of output 32 [2024-11-27 20:09:23,827 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:09:23,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651334144] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:09:23,828 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 20:09:23,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2024-11-27 20:09:23,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122027573] [2024-11-27 20:09:23,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 20:09:23,828 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-27 20:09:23,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:09:23,829 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-27 20:09:23,830 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2024-11-27 20:09:24,226 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-11-27 20:09:24,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 32 transitions, 97 flow. Second operand has 16 states, 16 states have (on average 15.8125) internal successors, (253), 16 states have internal predecessors, (253), 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) [2024-11-27 20:09:24,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:09:24,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-11-27 20:09:24,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:09:24,774 INFO L124 PetriNetUnfolderBase]: 421/813 cut-off events. [2024-11-27 20:09:24,774 INFO L125 PetriNetUnfolderBase]: For 59/59 co-relation queries the response was YES. [2024-11-27 20:09:24,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1683 conditions, 813 events. 421/813 cut-off events. For 59/59 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 4161 event pairs, 244 based on Foata normal form. 0/697 useless extension candidates. Maximal degree in co-relation 871. Up to 372 conditions per place. [2024-11-27 20:09:24,781 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 68 selfloop transitions, 9 changer transitions 0/82 dead transitions. [2024-11-27 20:09:24,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 82 transitions, 376 flow [2024-11-27 20:09:24,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-27 20:09:24,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-27 20:09:24,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-11-27 20:09:24,786 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.590625 [2024-11-27 20:09:24,786 INFO L175 Difference]: Start difference. First operand has 38 places, 32 transitions, 97 flow. Second operand 8 states and 189 transitions. [2024-11-27 20:09:24,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 82 transitions, 376 flow [2024-11-27 20:09:24,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 82 transitions, 368 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-27 20:09:24,793 INFO L231 Difference]: Finished difference. Result has 47 places, 38 transitions, 162 flow [2024-11-27 20:09:24,793 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=91, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=162, PETRI_PLACES=47, PETRI_TRANSITIONS=38} [2024-11-27 20:09:24,794 INFO L279 CegarLoopForPetriNet]: 40 programPoint places, 7 predicate places. [2024-11-27 20:09:24,794 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 38 transitions, 162 flow [2024-11-27 20:09:24,794 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 15.8125) internal successors, (253), 16 states have internal predecessors, (253), 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) [2024-11-27 20:09:24,795 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:09:24,795 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:09:24,814 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b09575e4-a9b8-479f-8119-87740fcb368f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-27 20:09:24,998 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b09575e4-a9b8-479f-8119-87740fcb368f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:09:24,999 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 20:09:24,999 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:09:24,999 INFO L85 PathProgramCache]: Analyzing trace with hash -496650873, now seen corresponding path program 1 times [2024-11-27 20:09:24,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:09:24,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718912954] [2024-11-27 20:09:24,999 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:09:25,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:09:25,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:09:25,266 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:09:25,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:09:25,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718912954] [2024-11-27 20:09:25,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718912954] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:09:25,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168860159] [2024-11-27 20:09:25,267 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:09:25,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:09:25,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b09575e4-a9b8-479f-8119-87740fcb368f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:09:25,270 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b09575e4-a9b8-479f-8119-87740fcb368f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:09:25,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b09575e4-a9b8-479f-8119-87740fcb368f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-27 20:09:25,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:09:25,349 INFO L256 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-27 20:09:25,350 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:09:25,467 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:09:25,467 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:09:25,567 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2024-11-27 20:09:25,599 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:09:25,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168860159] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:09:25,599 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 20:09:25,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2024-11-27 20:09:25,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213188378] [2024-11-27 20:09:25,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 20:09:25,600 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-27 20:09:25,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:09:25,601 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-27 20:09:25,601 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-11-27 20:09:25,734 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-11-27 20:09:25,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 38 transitions, 162 flow. Second operand has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:09:25,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:09:25,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-11-27 20:09:25,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:09:26,158 INFO L124 PetriNetUnfolderBase]: 831/1439 cut-off events. [2024-11-27 20:09:26,159 INFO L125 PetriNetUnfolderBase]: For 799/847 co-relation queries the response was YES. [2024-11-27 20:09:26,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3392 conditions, 1439 events. 831/1439 cut-off events. For 799/847 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 7109 event pairs, 246 based on Foata normal form. 0/1279 useless extension candidates. Maximal degree in co-relation 2790. Up to 853 conditions per place. [2024-11-27 20:09:26,173 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 47 selfloop transitions, 6 changer transitions 0/56 dead transitions. [2024-11-27 20:09:26,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 56 transitions, 332 flow [2024-11-27 20:09:26,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 20:09:26,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-27 20:09:26,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 104 transitions. [2024-11-27 20:09:26,175 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.52 [2024-11-27 20:09:26,175 INFO L175 Difference]: Start difference. First operand has 47 places, 38 transitions, 162 flow. Second operand 5 states and 104 transitions. [2024-11-27 20:09:26,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 56 transitions, 332 flow [2024-11-27 20:09:26,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 56 transitions, 326 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-11-27 20:09:26,182 INFO L231 Difference]: Finished difference. Result has 51 places, 40 transitions, 186 flow [2024-11-27 20:09:26,182 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=186, PETRI_PLACES=51, PETRI_TRANSITIONS=40} [2024-11-27 20:09:26,183 INFO L279 CegarLoopForPetriNet]: 40 programPoint places, 11 predicate places. [2024-11-27 20:09:26,183 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 40 transitions, 186 flow [2024-11-27 20:09:26,183 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:09:26,183 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:09:26,183 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:09:26,194 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b09575e4-a9b8-479f-8119-87740fcb368f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-27 20:09:26,387 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b09575e4-a9b8-479f-8119-87740fcb368f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:09:26,387 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 20:09:26,387 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:09:26,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1783692610, now seen corresponding path program 1 times [2024-11-27 20:09:26,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:09:26,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629027097] [2024-11-27 20:09:26,388 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:09:26,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:09:26,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:09:26,638 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:09:26,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:09:26,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629027097] [2024-11-27 20:09:26,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629027097] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:09:26,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942018282] [2024-11-27 20:09:26,638 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:09:26,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:09:26,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b09575e4-a9b8-479f-8119-87740fcb368f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:09:26,640 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b09575e4-a9b8-479f-8119-87740fcb368f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:09:26,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b09575e4-a9b8-479f-8119-87740fcb368f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-27 20:09:26,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:09:26,721 INFO L256 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-27 20:09:26,722 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:09:26,905 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:09:26,905 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:09:26,934 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2024-11-27 20:09:27,212 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:09:27,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942018282] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:09:27,212 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 20:09:27,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-27 20:09:27,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533599489] [2024-11-27 20:09:27,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 20:09:27,213 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-27 20:09:27,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:09:27,213 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-27 20:09:27,214 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2024-11-27 20:09:27,373 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-11-27 20:09:27,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 40 transitions, 186 flow. Second operand has 13 states, 13 states have (on average 14.461538461538462) internal successors, (188), 13 states have internal predecessors, (188), 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) [2024-11-27 20:09:27,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:09:27,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-11-27 20:09:27,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:09:27,812 INFO L124 PetriNetUnfolderBase]: 854/1473 cut-off events. [2024-11-27 20:09:27,812 INFO L125 PetriNetUnfolderBase]: For 795/882 co-relation queries the response was YES. [2024-11-27 20:09:27,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3686 conditions, 1473 events. 854/1473 cut-off events. For 795/882 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 7218 event pairs, 456 based on Foata normal form. 0/1313 useless extension candidates. Maximal degree in co-relation 3111. Up to 1107 conditions per place. [2024-11-27 20:09:27,832 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 57 selfloop transitions, 9 changer transitions 0/69 dead transitions. [2024-11-27 20:09:27,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 69 transitions, 419 flow [2024-11-27 20:09:27,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-27 20:09:27,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-27 20:09:27,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 141 transitions. [2024-11-27 20:09:27,833 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5035714285714286 [2024-11-27 20:09:27,834 INFO L175 Difference]: Start difference. First operand has 51 places, 40 transitions, 186 flow. Second operand 7 states and 141 transitions. [2024-11-27 20:09:27,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 69 transitions, 419 flow [2024-11-27 20:09:27,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 69 transitions, 409 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-27 20:09:27,843 INFO L231 Difference]: Finished difference. Result has 56 places, 43 transitions, 219 flow [2024-11-27 20:09:27,843 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=219, PETRI_PLACES=56, PETRI_TRANSITIONS=43} [2024-11-27 20:09:27,844 INFO L279 CegarLoopForPetriNet]: 40 programPoint places, 16 predicate places. [2024-11-27 20:09:27,844 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 43 transitions, 219 flow [2024-11-27 20:09:27,844 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 14.461538461538462) internal successors, (188), 13 states have internal predecessors, (188), 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) [2024-11-27 20:09:27,845 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:09:27,845 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-27 20:09:27,857 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b09575e4-a9b8-479f-8119-87740fcb368f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-27 20:09:28,045 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b09575e4-a9b8-479f-8119-87740fcb368f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:09:28,046 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 20:09:28,046 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:09:28,047 INFO L85 PathProgramCache]: Analyzing trace with hash -814462334, now seen corresponding path program 2 times [2024-11-27 20:09:28,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:09:28,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690633829] [2024-11-27 20:09:28,047 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 20:09:28,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:09:28,070 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-27 20:09:28,071 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:09:28,325 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-27 20:09:28,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:09:28,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690633829] [2024-11-27 20:09:28,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690633829] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:09:28,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608313724] [2024-11-27 20:09:28,326 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 20:09:28,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:09:28,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b09575e4-a9b8-479f-8119-87740fcb368f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:09:28,329 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b09575e4-a9b8-479f-8119-87740fcb368f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:09:28,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b09575e4-a9b8-479f-8119-87740fcb368f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-27 20:09:28,440 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-27 20:09:28,440 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:09:28,441 INFO L256 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-27 20:09:28,443 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:09:28,461 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 [2024-11-27 20:09:28,835 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-27 20:09:28,835 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:09:29,081 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-27 20:09:29,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608313724] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:09:29,082 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 20:09:29,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2024-11-27 20:09:29,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045365335] [2024-11-27 20:09:29,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 20:09:29,084 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-27 20:09:29,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:09:29,085 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-27 20:09:29,086 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-11-27 20:09:29,442 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-11-27 20:09:29,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 43 transitions, 219 flow. Second operand has 10 states, 10 states have (on average 16.9) internal successors, (169), 10 states have internal predecessors, (169), 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) [2024-11-27 20:09:29,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:09:29,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-11-27 20:09:29,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:09:29,960 INFO L124 PetriNetUnfolderBase]: 708/1292 cut-off events. [2024-11-27 20:09:29,960 INFO L125 PetriNetUnfolderBase]: For 489/489 co-relation queries the response was YES. [2024-11-27 20:09:29,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3291 conditions, 1292 events. 708/1292 cut-off events. For 489/489 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 6860 event pairs, 399 based on Foata normal form. 0/1228 useless extension candidates. Maximal degree in co-relation 2811. Up to 867 conditions per place. [2024-11-27 20:09:29,971 INFO L140 encePairwiseOnDemand]: 35/40 looper letters, 44 selfloop transitions, 9 changer transitions 0/58 dead transitions. [2024-11-27 20:09:29,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 58 transitions, 380 flow [2024-11-27 20:09:29,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 20:09:29,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-27 20:09:29,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 105 transitions. [2024-11-27 20:09:29,972 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.525 [2024-11-27 20:09:29,972 INFO L175 Difference]: Start difference. First operand has 56 places, 43 transitions, 219 flow. Second operand 5 states and 105 transitions. [2024-11-27 20:09:29,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 58 transitions, 380 flow [2024-11-27 20:09:29,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 58 transitions, 365 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-27 20:09:29,981 INFO L231 Difference]: Finished difference. Result has 55 places, 42 transitions, 218 flow [2024-11-27 20:09:29,982 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=218, PETRI_PLACES=55, PETRI_TRANSITIONS=42} [2024-11-27 20:09:29,983 INFO L279 CegarLoopForPetriNet]: 40 programPoint places, 15 predicate places. [2024-11-27 20:09:29,984 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 42 transitions, 218 flow [2024-11-27 20:09:29,984 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 16.9) internal successors, (169), 10 states have internal predecessors, (169), 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) [2024-11-27 20:09:29,984 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:09:29,984 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:09:29,996 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b09575e4-a9b8-479f-8119-87740fcb368f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-27 20:09:30,189 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b09575e4-a9b8-479f-8119-87740fcb368f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:09:30,189 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 20:09:30,189 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:09:30,190 INFO L85 PathProgramCache]: Analyzing trace with hash 436662470, now seen corresponding path program 1 times [2024-11-27 20:09:30,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:09:30,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169729796] [2024-11-27 20:09:30,190 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:09:30,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:09:30,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:09:30,499 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:09:30,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:09:30,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169729796] [2024-11-27 20:09:30,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169729796] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:09:30,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4898635] [2024-11-27 20:09:30,500 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:09:30,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:09:30,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b09575e4-a9b8-479f-8119-87740fcb368f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:09:30,503 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b09575e4-a9b8-479f-8119-87740fcb368f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:09:30,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b09575e4-a9b8-479f-8119-87740fcb368f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-27 20:09:30,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:09:30,592 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-27 20:09:30,594 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:09:30,802 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:09:30,802 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:09:30,887 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 36 treesize of output 32 [2024-11-27 20:09:31,163 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:09:31,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4898635] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:09:31,164 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 20:09:31,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2024-11-27 20:09:31,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315503421] [2024-11-27 20:09:31,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 20:09:31,165 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-27 20:09:31,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:09:31,166 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-27 20:09:31,166 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2024-11-27 20:09:31,538 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-11-27 20:09:31,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 42 transitions, 218 flow. Second operand has 16 states, 16 states have (on average 14.375) internal successors, (230), 16 states have internal predecessors, (230), 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) [2024-11-27 20:09:31,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:09:31,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-11-27 20:09:31,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:09:32,079 INFO L124 PetriNetUnfolderBase]: 785/1353 cut-off events. [2024-11-27 20:09:32,080 INFO L125 PetriNetUnfolderBase]: For 1434/1434 co-relation queries the response was YES. [2024-11-27 20:09:32,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3703 conditions, 1353 events. 785/1353 cut-off events. For 1434/1434 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 6429 event pairs, 456 based on Foata normal form. 0/1241 useless extension candidates. Maximal degree in co-relation 3105. Up to 681 conditions per place. [2024-11-27 20:09:32,092 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 67 selfloop transitions, 13 changer transitions 0/82 dead transitions. [2024-11-27 20:09:32,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 82 transitions, 523 flow [2024-11-27 20:09:32,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-27 20:09:32,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-27 20:09:32,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 169 transitions. [2024-11-27 20:09:32,096 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.528125 [2024-11-27 20:09:32,096 INFO L175 Difference]: Start difference. First operand has 55 places, 42 transitions, 218 flow. Second operand 8 states and 169 transitions. [2024-11-27 20:09:32,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 82 transitions, 523 flow [2024-11-27 20:09:32,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 82 transitions, 487 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-27 20:09:32,103 INFO L231 Difference]: Finished difference. Result has 60 places, 46 transitions, 264 flow [2024-11-27 20:09:32,104 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=264, PETRI_PLACES=60, PETRI_TRANSITIONS=46} [2024-11-27 20:09:32,104 INFO L279 CegarLoopForPetriNet]: 40 programPoint places, 20 predicate places. [2024-11-27 20:09:32,104 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 46 transitions, 264 flow [2024-11-27 20:09:32,105 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 14.375) internal successors, (230), 16 states have internal predecessors, (230), 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) [2024-11-27 20:09:32,105 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:09:32,105 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:09:32,118 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b09575e4-a9b8-479f-8119-87740fcb368f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-27 20:09:32,307 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b09575e4-a9b8-479f-8119-87740fcb368f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:09:32,308 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 20:09:32,308 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:09:32,309 INFO L85 PathProgramCache]: Analyzing trace with hash -260714633, now seen corresponding path program 2 times [2024-11-27 20:09:32,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:09:32,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914149205] [2024-11-27 20:09:32,309 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 20:09:32,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:09:32,346 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-27 20:09:32,347 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:09:32,701 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-27 20:09:32,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:09:32,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914149205] [2024-11-27 20:09:32,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914149205] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:09:32,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:09:32,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-27 20:09:32,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332646445] [2024-11-27 20:09:32,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:09:32,702 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 20:09:32,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:09:32,702 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 20:09:32,702 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-27 20:09:32,793 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-11-27 20:09:32,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 46 transitions, 264 flow. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 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) [2024-11-27 20:09:32,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:09:32,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-11-27 20:09:32,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:09:33,151 INFO L124 PetriNetUnfolderBase]: 760/1306 cut-off events. [2024-11-27 20:09:33,151 INFO L125 PetriNetUnfolderBase]: For 1068/1068 co-relation queries the response was YES. [2024-11-27 20:09:33,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3690 conditions, 1306 events. 760/1306 cut-off events. For 1068/1068 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 6207 event pairs, 540 based on Foata normal form. 0/1290 useless extension candidates. Maximal degree in co-relation 3164. Up to 1106 conditions per place. [2024-11-27 20:09:33,161 INFO L140 encePairwiseOnDemand]: 35/40 looper letters, 44 selfloop transitions, 9 changer transitions 0/55 dead transitions. [2024-11-27 20:09:33,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 55 transitions, 409 flow [2024-11-27 20:09:33,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 20:09:33,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-27 20:09:33,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 92 transitions. [2024-11-27 20:09:33,163 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.46 [2024-11-27 20:09:33,163 INFO L175 Difference]: Start difference. First operand has 60 places, 46 transitions, 264 flow. Second operand 5 states and 92 transitions. [2024-11-27 20:09:33,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 55 transitions, 409 flow [2024-11-27 20:09:33,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 55 transitions, 393 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-11-27 20:09:33,174 INFO L231 Difference]: Finished difference. Result has 58 places, 45 transitions, 260 flow [2024-11-27 20:09:33,174 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=260, PETRI_PLACES=58, PETRI_TRANSITIONS=45} [2024-11-27 20:09:33,175 INFO L279 CegarLoopForPetriNet]: 40 programPoint places, 18 predicate places. [2024-11-27 20:09:33,175 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 45 transitions, 260 flow [2024-11-27 20:09:33,175 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 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) [2024-11-27 20:09:33,175 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:09:33,175 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:09:33,175 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-27 20:09:33,179 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 20:09:33,180 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:09:33,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1438643781, now seen corresponding path program 2 times [2024-11-27 20:09:33,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:09:33,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413067705] [2024-11-27 20:09:33,180 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 20:09:33,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:09:33,196 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-27 20:09:33,196 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:09:33,435 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-27 20:09:33,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:09:33,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413067705] [2024-11-27 20:09:33,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413067705] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:09:33,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829379803] [2024-11-27 20:09:33,436 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 20:09:33,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:09:33,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b09575e4-a9b8-479f-8119-87740fcb368f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:09:33,439 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b09575e4-a9b8-479f-8119-87740fcb368f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:09:33,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b09575e4-a9b8-479f-8119-87740fcb368f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-27 20:09:33,538 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-27 20:09:33,538 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:09:33,539 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-27 20:09:33,541 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:09:33,566 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 [2024-11-27 20:09:33,871 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-27 20:09:33,871 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:09:34,132 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-27 20:09:34,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829379803] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:09:34,133 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 20:09:34,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2024-11-27 20:09:34,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73895042] [2024-11-27 20:09:34,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 20:09:34,135 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-27 20:09:34,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:09:34,136 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-27 20:09:34,136 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-11-27 20:09:34,350 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-11-27 20:09:34,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 45 transitions, 260 flow. Second operand has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 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) [2024-11-27 20:09:34,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:09:34,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-11-27 20:09:34,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:09:34,742 INFO L124 PetriNetUnfolderBase]: 706/1220 cut-off events. [2024-11-27 20:09:34,743 INFO L125 PetriNetUnfolderBase]: For 1004/1004 co-relation queries the response was YES. [2024-11-27 20:09:34,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3531 conditions, 1220 events. 706/1220 cut-off events. For 1004/1004 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 5847 event pairs, 330 based on Foata normal form. 16/1236 useless extension candidates. Maximal degree in co-relation 3013. Up to 716 conditions per place. [2024-11-27 20:09:34,751 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 37 selfloop transitions, 14 changer transitions 0/53 dead transitions. [2024-11-27 20:09:34,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 53 transitions, 395 flow [2024-11-27 20:09:34,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 20:09:34,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-27 20:09:34,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 91 transitions. [2024-11-27 20:09:34,753 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.455 [2024-11-27 20:09:34,753 INFO L175 Difference]: Start difference. First operand has 58 places, 45 transitions, 260 flow. Second operand 5 states and 91 transitions. [2024-11-27 20:09:34,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 53 transitions, 395 flow [2024-11-27 20:09:34,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 53 transitions, 377 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-27 20:09:34,761 INFO L231 Difference]: Finished difference. Result has 56 places, 43 transitions, 258 flow [2024-11-27 20:09:34,761 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=258, PETRI_PLACES=56, PETRI_TRANSITIONS=43} [2024-11-27 20:09:34,762 INFO L279 CegarLoopForPetriNet]: 40 programPoint places, 16 predicate places. [2024-11-27 20:09:34,762 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 43 transitions, 258 flow [2024-11-27 20:09:34,762 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 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) [2024-11-27 20:09:34,762 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:09:34,762 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:09:34,773 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b09575e4-a9b8-479f-8119-87740fcb368f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-27 20:09:34,967 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b09575e4-a9b8-479f-8119-87740fcb368f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-27 20:09:34,967 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 20:09:34,968 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:09:34,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1494710194, now seen corresponding path program 1 times [2024-11-27 20:09:34,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:09:34,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186988839] [2024-11-27 20:09:34,968 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:09:34,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:09:34,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:09:35,017 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:09:35,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:09:35,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186988839] [2024-11-27 20:09:35,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186988839] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:09:35,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:09:35,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-27 20:09:35,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434278857] [2024-11-27 20:09:35,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:09:35,019 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-27 20:09:35,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:09:35,020 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-27 20:09:35,020 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-27 20:09:35,031 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-11-27 20:09:35,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 43 transitions, 258 flow. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:09:35,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:09:35,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-11-27 20:09:35,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:09:35,257 INFO L124 PetriNetUnfolderBase]: 715/1219 cut-off events. [2024-11-27 20:09:35,258 INFO L125 PetriNetUnfolderBase]: For 1199/1199 co-relation queries the response was YES. [2024-11-27 20:09:35,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3656 conditions, 1219 events. 715/1219 cut-off events. For 1199/1199 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 5678 event pairs, 203 based on Foata normal form. 2/1221 useless extension candidates. Maximal degree in co-relation 3132. Up to 904 conditions per place. [2024-11-27 20:09:35,267 INFO L140 encePairwiseOnDemand]: 35/40 looper letters, 52 selfloop transitions, 7 changer transitions 1/62 dead transitions. [2024-11-27 20:09:35,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 62 transitions, 465 flow [2024-11-27 20:09:35,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-27 20:09:35,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-27 20:09:35,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 85 transitions. [2024-11-27 20:09:35,269 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7083333333333334 [2024-11-27 20:09:35,269 INFO L175 Difference]: Start difference. First operand has 56 places, 43 transitions, 258 flow. Second operand 3 states and 85 transitions. [2024-11-27 20:09:35,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 62 transitions, 465 flow [2024-11-27 20:09:35,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 62 transitions, 429 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-27 20:09:35,277 INFO L231 Difference]: Finished difference. Result has 55 places, 49 transitions, 309 flow [2024-11-27 20:09:35,277 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=309, PETRI_PLACES=55, PETRI_TRANSITIONS=49} [2024-11-27 20:09:35,278 INFO L279 CegarLoopForPetriNet]: 40 programPoint places, 15 predicate places. [2024-11-27 20:09:35,278 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 49 transitions, 309 flow [2024-11-27 20:09:35,278 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:09:35,278 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:09:35,278 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:09:35,278 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-27 20:09:35,279 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 20:09:35,279 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:09:35,279 INFO L85 PathProgramCache]: Analyzing trace with hash 203057212, now seen corresponding path program 1 times [2024-11-27 20:09:35,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:09:35,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685155326] [2024-11-27 20:09:35,280 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:09:35,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:09:35,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:09:35,400 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:09:35,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:09:35,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685155326] [2024-11-27 20:09:35,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685155326] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:09:35,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:09:35,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-27 20:09:35,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380892853] [2024-11-27 20:09:35,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:09:35,401 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 20:09:35,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:09:35,402 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 20:09:35,402 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-27 20:09:35,410 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-11-27 20:09:35,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 49 transitions, 309 flow. Second operand has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 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) [2024-11-27 20:09:35,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:09:35,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-11-27 20:09:35,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:09:35,746 INFO L124 PetriNetUnfolderBase]: 697/1211 cut-off events. [2024-11-27 20:09:35,746 INFO L125 PetriNetUnfolderBase]: For 1277/1277 co-relation queries the response was YES. [2024-11-27 20:09:35,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3628 conditions, 1211 events. 697/1211 cut-off events. For 1277/1277 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 6174 event pairs, 263 based on Foata normal form. 18/1229 useless extension candidates. Maximal degree in co-relation 3113. Up to 664 conditions per place. [2024-11-27 20:09:35,756 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 86 selfloop transitions, 9 changer transitions 0/97 dead transitions. [2024-11-27 20:09:35,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 97 transitions, 762 flow [2024-11-27 20:09:35,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 20:09:35,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-27 20:09:35,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 131 transitions. [2024-11-27 20:09:35,758 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.655 [2024-11-27 20:09:35,758 INFO L175 Difference]: Start difference. First operand has 55 places, 49 transitions, 309 flow. Second operand 5 states and 131 transitions. [2024-11-27 20:09:35,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 97 transitions, 762 flow [2024-11-27 20:09:35,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 97 transitions, 745 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-27 20:09:35,767 INFO L231 Difference]: Finished difference. Result has 61 places, 53 transitions, 371 flow [2024-11-27 20:09:35,767 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=371, PETRI_PLACES=61, PETRI_TRANSITIONS=53} [2024-11-27 20:09:35,768 INFO L279 CegarLoopForPetriNet]: 40 programPoint places, 21 predicate places. [2024-11-27 20:09:35,768 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 53 transitions, 371 flow [2024-11-27 20:09:35,768 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 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) [2024-11-27 20:09:35,768 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:09:35,768 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:09:35,768 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-27 20:09:35,769 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 20:09:35,769 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:09:35,769 INFO L85 PathProgramCache]: Analyzing trace with hash 840768530, now seen corresponding path program 2 times [2024-11-27 20:09:35,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:09:35,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958092775] [2024-11-27 20:09:35,770 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 20:09:35,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:09:35,786 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-27 20:09:35,789 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:09:35,965 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:09:35,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:09:35,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958092775] [2024-11-27 20:09:35,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958092775] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:09:35,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:09:35,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-27 20:09:35,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429846100] [2024-11-27 20:09:35,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:09:35,967 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-27 20:09:35,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:09:35,967 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-27 20:09:35,968 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-11-27 20:09:35,978 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-11-27 20:09:35,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 53 transitions, 371 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 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) [2024-11-27 20:09:35,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:09:35,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-11-27 20:09:35,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:09:36,415 INFO L124 PetriNetUnfolderBase]: 744/1278 cut-off events. [2024-11-27 20:09:36,415 INFO L125 PetriNetUnfolderBase]: For 2368/2368 co-relation queries the response was YES. [2024-11-27 20:09:36,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4428 conditions, 1278 events. 744/1278 cut-off events. For 2368/2368 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 6113 event pairs, 173 based on Foata normal form. 60/1338 useless extension candidates. Maximal degree in co-relation 3930. Up to 594 conditions per place. [2024-11-27 20:09:36,424 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 90 selfloop transitions, 29 changer transitions 0/120 dead transitions. [2024-11-27 20:09:36,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 120 transitions, 988 flow [2024-11-27 20:09:36,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-27 20:09:36,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-27 20:09:36,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-11-27 20:09:36,426 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.596875 [2024-11-27 20:09:36,426 INFO L175 Difference]: Start difference. First operand has 61 places, 53 transitions, 371 flow. Second operand 8 states and 191 transitions. [2024-11-27 20:09:36,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 120 transitions, 988 flow [2024-11-27 20:09:36,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 120 transitions, 954 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-11-27 20:09:36,435 INFO L231 Difference]: Finished difference. Result has 73 places, 70 transitions, 630 flow [2024-11-27 20:09:36,435 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=358, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=630, PETRI_PLACES=73, PETRI_TRANSITIONS=70} [2024-11-27 20:09:36,436 INFO L279 CegarLoopForPetriNet]: 40 programPoint places, 33 predicate places. [2024-11-27 20:09:36,436 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 70 transitions, 630 flow [2024-11-27 20:09:36,436 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 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) [2024-11-27 20:09:36,436 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:09:36,437 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:09:36,437 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-27 20:09:36,437 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 20:09:36,437 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:09:36,437 INFO L85 PathProgramCache]: Analyzing trace with hash 810010372, now seen corresponding path program 3 times [2024-11-27 20:09:36,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:09:36,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16926238] [2024-11-27 20:09:36,438 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 20:09:36,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:09:36,451 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-11-27 20:09:36,451 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:09:36,578 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:09:36,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:09:36,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16926238] [2024-11-27 20:09:36,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16926238] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:09:36,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:09:36,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-27 20:09:36,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231081033] [2024-11-27 20:09:36,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:09:36,580 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 20:09:36,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:09:36,580 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 20:09:36,581 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-27 20:09:36,586 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-11-27 20:09:36,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 70 transitions, 630 flow. Second operand has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 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) [2024-11-27 20:09:36,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:09:36,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-11-27 20:09:36,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:09:36,950 INFO L124 PetriNetUnfolderBase]: 836/1428 cut-off events. [2024-11-27 20:09:36,951 INFO L125 PetriNetUnfolderBase]: For 5428/5428 co-relation queries the response was YES. [2024-11-27 20:09:36,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6168 conditions, 1428 events. 836/1428 cut-off events. For 5428/5428 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 7203 event pairs, 250 based on Foata normal form. 8/1436 useless extension candidates. Maximal degree in co-relation 5636. Up to 686 conditions per place. [2024-11-27 20:09:36,964 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 92 selfloop transitions, 31 changer transitions 1/125 dead transitions. [2024-11-27 20:09:36,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 125 transitions, 1341 flow [2024-11-27 20:09:36,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 20:09:36,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-27 20:09:36,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 130 transitions. [2024-11-27 20:09:36,965 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-11-27 20:09:36,965 INFO L175 Difference]: Start difference. First operand has 73 places, 70 transitions, 630 flow. Second operand 5 states and 130 transitions. [2024-11-27 20:09:36,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 125 transitions, 1341 flow [2024-11-27 20:09:36,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 125 transitions, 1283 flow, removed 15 selfloop flow, removed 1 redundant places. [2024-11-27 20:09:36,990 INFO L231 Difference]: Finished difference. Result has 79 places, 87 transitions, 923 flow [2024-11-27 20:09:36,990 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=600, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=923, PETRI_PLACES=79, PETRI_TRANSITIONS=87} [2024-11-27 20:09:36,991 INFO L279 CegarLoopForPetriNet]: 40 programPoint places, 39 predicate places. [2024-11-27 20:09:36,991 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 87 transitions, 923 flow [2024-11-27 20:09:36,991 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 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) [2024-11-27 20:09:36,991 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:09:36,991 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:09:36,991 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-27 20:09:36,992 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 20:09:36,992 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:09:36,992 INFO L85 PathProgramCache]: Analyzing trace with hash -445062962, now seen corresponding path program 4 times [2024-11-27 20:09:36,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:09:36,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548945630] [2024-11-27 20:09:36,993 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 20:09:36,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:09:37,015 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 20:09:37,018 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:09:37,377 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:09:37,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:09:37,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548945630] [2024-11-27 20:09:37,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548945630] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:09:37,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:09:37,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-27 20:09:37,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153667063] [2024-11-27 20:09:37,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:09:37,378 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-27 20:09:37,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:09:37,380 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-27 20:09:37,380 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-27 20:09:37,392 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-11-27 20:09:37,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 87 transitions, 923 flow. Second operand has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 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) [2024-11-27 20:09:37,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:09:37,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-11-27 20:09:37,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:09:37,869 INFO L124 PetriNetUnfolderBase]: 842/1468 cut-off events. [2024-11-27 20:09:37,869 INFO L125 PetriNetUnfolderBase]: For 7278/7278 co-relation queries the response was YES. [2024-11-27 20:09:37,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6819 conditions, 1468 events. 842/1468 cut-off events. For 7278/7278 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 7475 event pairs, 332 based on Foata normal form. 16/1484 useless extension candidates. Maximal degree in co-relation 6289. Up to 905 conditions per place. [2024-11-27 20:09:37,889 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 76 selfloop transitions, 49 changer transitions 1/128 dead transitions. [2024-11-27 20:09:37,890 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 128 transitions, 1525 flow [2024-11-27 20:09:37,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 20:09:37,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-27 20:09:37,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-11-27 20:09:37,891 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6208333333333333 [2024-11-27 20:09:37,891 INFO L175 Difference]: Start difference. First operand has 79 places, 87 transitions, 923 flow. Second operand 6 states and 149 transitions. [2024-11-27 20:09:37,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 128 transitions, 1525 flow [2024-11-27 20:09:37,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 128 transitions, 1497 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-11-27 20:09:37,927 INFO L231 Difference]: Finished difference. Result has 87 places, 105 transitions, 1311 flow [2024-11-27 20:09:37,927 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=902, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1311, PETRI_PLACES=87, PETRI_TRANSITIONS=105} [2024-11-27 20:09:37,928 INFO L279 CegarLoopForPetriNet]: 40 programPoint places, 47 predicate places. [2024-11-27 20:09:37,928 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 105 transitions, 1311 flow [2024-11-27 20:09:37,928 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 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) [2024-11-27 20:09:37,929 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:09:37,929 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:09:37,929 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-27 20:09:37,930 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 20:09:37,930 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:09:37,930 INFO L85 PathProgramCache]: Analyzing trace with hash 742422576, now seen corresponding path program 5 times [2024-11-27 20:09:37,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:09:37,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809270488] [2024-11-27 20:09:37,931 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-27 20:09:37,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:09:37,957 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 20:09:37,958 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:09:38,136 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:09:38,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:09:38,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809270488] [2024-11-27 20:09:38,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809270488] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:09:38,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:09:38,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-27 20:09:38,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298286640] [2024-11-27 20:09:38,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:09:38,138 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-27 20:09:38,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:09:38,139 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-27 20:09:38,139 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-11-27 20:09:38,147 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-11-27 20:09:38,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 105 transitions, 1311 flow. Second operand has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 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) [2024-11-27 20:09:38,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:09:38,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-11-27 20:09:38,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:09:38,575 INFO L124 PetriNetUnfolderBase]: 850/1452 cut-off events. [2024-11-27 20:09:38,576 INFO L125 PetriNetUnfolderBase]: For 9245/9245 co-relation queries the response was YES. [2024-11-27 20:09:38,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7383 conditions, 1452 events. 850/1452 cut-off events. For 9245/9245 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 7314 event pairs, 228 based on Foata normal form. 12/1464 useless extension candidates. Maximal degree in co-relation 6829. Up to 706 conditions per place. [2024-11-27 20:09:38,589 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 107 selfloop transitions, 45 changer transitions 1/154 dead transitions. [2024-11-27 20:09:38,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 154 transitions, 1913 flow [2024-11-27 20:09:38,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 20:09:38,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-27 20:09:38,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-11-27 20:09:38,591 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-11-27 20:09:38,591 INFO L175 Difference]: Start difference. First operand has 87 places, 105 transitions, 1311 flow. Second operand 6 states and 156 transitions. [2024-11-27 20:09:38,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 154 transitions, 1913 flow [2024-11-27 20:09:38,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 154 transitions, 1840 flow, removed 20 selfloop flow, removed 1 redundant places. [2024-11-27 20:09:38,636 INFO L231 Difference]: Finished difference. Result has 93 places, 109 transitions, 1427 flow [2024-11-27 20:09:38,636 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1238, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1427, PETRI_PLACES=93, PETRI_TRANSITIONS=109} [2024-11-27 20:09:38,637 INFO L279 CegarLoopForPetriNet]: 40 programPoint places, 53 predicate places. [2024-11-27 20:09:38,637 INFO L471 AbstractCegarLoop]: Abstraction has has 93 places, 109 transitions, 1427 flow [2024-11-27 20:09:38,637 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 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) [2024-11-27 20:09:38,637 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:09:38,637 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:09:38,638 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-11-27 20:09:38,638 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 20:09:38,638 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:09:38,638 INFO L85 PathProgramCache]: Analyzing trace with hash -1302579567, now seen corresponding path program 1 times [2024-11-27 20:09:38,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:09:38,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929540067] [2024-11-27 20:09:38,639 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:09:38,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:09:38,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:09:38,875 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:09:38,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:09:38,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929540067] [2024-11-27 20:09:38,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929540067] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:09:38,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140880250] [2024-11-27 20:09:38,876 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:09:38,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:09:38,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b09575e4-a9b8-479f-8119-87740fcb368f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:09:38,879 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b09575e4-a9b8-479f-8119-87740fcb368f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:09:38,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b09575e4-a9b8-479f-8119-87740fcb368f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-27 20:09:38,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:09:38,980 INFO L256 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-27 20:09:38,982 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:09:39,039 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 1 [2024-11-27 20:09:39,237 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:09:39,237 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:09:39,481 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 72 treesize of output 64 [2024-11-27 20:09:39,521 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 20:09:39,521 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 118 treesize of output 116 [2024-11-27 20:09:40,784 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:09:40,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140880250] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:09:40,785 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 20:09:40,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 18 [2024-11-27 20:09:40,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825271231] [2024-11-27 20:09:40,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 20:09:40,786 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-27 20:09:40,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:09:40,787 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-27 20:09:40,787 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2024-11-27 20:09:41,392 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-11-27 20:09:41,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 109 transitions, 1427 flow. Second operand has 18 states, 18 states have (on average 18.22222222222222) internal successors, (328), 18 states have internal predecessors, (328), 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) [2024-11-27 20:09:41,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:09:41,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-11-27 20:09:41,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:09:44,572 INFO L124 PetriNetUnfolderBase]: 2699/4684 cut-off events. [2024-11-27 20:09:44,573 INFO L125 PetriNetUnfolderBase]: For 22297/22297 co-relation queries the response was YES. [2024-11-27 20:09:44,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20413 conditions, 4684 events. 2699/4684 cut-off events. For 22297/22297 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 27512 event pairs, 54 based on Foata normal form. 24/4708 useless extension candidates. Maximal degree in co-relation 18267. Up to 783 conditions per place. [2024-11-27 20:09:44,599 INFO L140 encePairwiseOnDemand]: 25/40 looper letters, 282 selfloop transitions, 148 changer transitions 142/574 dead transitions. [2024-11-27 20:09:44,599 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 574 transitions, 5882 flow [2024-11-27 20:09:44,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-11-27 20:09:44,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2024-11-27 20:09:44,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 1157 transitions. [2024-11-27 20:09:44,605 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6026041666666667 [2024-11-27 20:09:44,605 INFO L175 Difference]: Start difference. First operand has 93 places, 109 transitions, 1427 flow. Second operand 48 states and 1157 transitions. [2024-11-27 20:09:44,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 574 transitions, 5882 flow [2024-11-27 20:09:44,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 574 transitions, 5750 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-11-27 20:09:44,694 INFO L231 Difference]: Finished difference. Result has 154 places, 202 transitions, 2473 flow [2024-11-27 20:09:44,694 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1368, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=2473, PETRI_PLACES=154, PETRI_TRANSITIONS=202} [2024-11-27 20:09:44,695 INFO L279 CegarLoopForPetriNet]: 40 programPoint places, 114 predicate places. [2024-11-27 20:09:44,697 INFO L471 AbstractCegarLoop]: Abstraction has has 154 places, 202 transitions, 2473 flow [2024-11-27 20:09:44,697 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 18.22222222222222) internal successors, (328), 18 states have internal predecessors, (328), 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) [2024-11-27 20:09:44,697 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:09:44,697 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:09:44,708 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b09575e4-a9b8-479f-8119-87740fcb368f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-27 20:09:44,902 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b09575e4-a9b8-479f-8119-87740fcb368f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:09:44,902 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 20:09:44,903 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:09:44,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1666005588, now seen corresponding path program 1 times [2024-11-27 20:09:44,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:09:44,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061150375] [2024-11-27 20:09:44,903 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:09:44,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:09:44,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:09:45,153 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:09:45,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:09:45,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061150375] [2024-11-27 20:09:45,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061150375] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:09:45,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:09:45,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-27 20:09:45,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156861218] [2024-11-27 20:09:45,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:09:45,155 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-27 20:09:45,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:09:45,156 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-27 20:09:45,156 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-27 20:09:45,212 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-11-27 20:09:45,213 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 202 transitions, 2473 flow. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:09:45,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:09:45,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-11-27 20:09:45,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:09:45,948 INFO L124 PetriNetUnfolderBase]: 2183/3827 cut-off events. [2024-11-27 20:09:45,949 INFO L125 PetriNetUnfolderBase]: For 21958/21958 co-relation queries the response was YES. [2024-11-27 20:09:45,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18088 conditions, 3827 events. 2183/3827 cut-off events. For 21958/21958 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 21670 event pairs, 779 based on Foata normal form. 2/3829 useless extension candidates. Maximal degree in co-relation 17906. Up to 3126 conditions per place. [2024-11-27 20:09:45,975 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 185 selfloop transitions, 44 changer transitions 1/232 dead transitions. [2024-11-27 20:09:45,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 232 transitions, 3186 flow [2024-11-27 20:09:45,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 20:09:45,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-27 20:09:45,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-11-27 20:09:45,977 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-11-27 20:09:45,977 INFO L175 Difference]: Start difference. First operand has 154 places, 202 transitions, 2473 flow. Second operand 6 states and 144 transitions. [2024-11-27 20:09:45,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 232 transitions, 3186 flow [2024-11-27 20:09:46,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 232 transitions, 2871 flow, removed 122 selfloop flow, removed 16 redundant places. [2024-11-27 20:09:46,101 INFO L231 Difference]: Finished difference. Result has 134 places, 207 transitions, 2357 flow [2024-11-27 20:09:46,101 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2166, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2357, PETRI_PLACES=134, PETRI_TRANSITIONS=207} [2024-11-27 20:09:46,102 INFO L279 CegarLoopForPetriNet]: 40 programPoint places, 94 predicate places. [2024-11-27 20:09:46,102 INFO L471 AbstractCegarLoop]: Abstraction has has 134 places, 207 transitions, 2357 flow [2024-11-27 20:09:46,102 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:09:46,103 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:09:46,103 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:09:46,103 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-11-27 20:09:46,103 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 20:09:46,103 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:09:46,104 INFO L85 PathProgramCache]: Analyzing trace with hash 349376380, now seen corresponding path program 2 times [2024-11-27 20:09:46,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:09:46,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245711528] [2024-11-27 20:09:46,104 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 20:09:46,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:09:46,125 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 20:09:46,125 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:09:46,597 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:09:46,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:09:46,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245711528] [2024-11-27 20:09:46,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245711528] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:09:46,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711334072] [2024-11-27 20:09:46,598 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 20:09:46,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:09:46,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b09575e4-a9b8-479f-8119-87740fcb368f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:09:46,601 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b09575e4-a9b8-479f-8119-87740fcb368f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:09:46,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b09575e4-a9b8-479f-8119-87740fcb368f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-27 20:09:46,712 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 20:09:46,712 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:09:46,714 INFO L256 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-27 20:09:46,716 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:09:46,992 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 7 [2024-11-27 20:09:46,999 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:09:47,000 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:09:47,056 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-27 20:09:47,057 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 19 treesize of output 7 [2024-11-27 20:09:47,337 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:09:47,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711334072] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:09:47,337 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 20:09:47,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 15 [2024-11-27 20:09:47,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673130919] [2024-11-27 20:09:47,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 20:09:47,338 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-27 20:09:47,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:09:47,339 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-27 20:09:47,339 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2024-11-27 20:09:47,695 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-11-27 20:09:47,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 207 transitions, 2357 flow. Second operand has 16 states, 16 states have (on average 14.375) internal successors, (230), 16 states have internal predecessors, (230), 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) [2024-11-27 20:09:47,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:09:47,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-11-27 20:09:47,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:09:49,037 INFO L124 PetriNetUnfolderBase]: 2500/4376 cut-off events. [2024-11-27 20:09:49,037 INFO L125 PetriNetUnfolderBase]: For 19713/19713 co-relation queries the response was YES. [2024-11-27 20:09:49,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19276 conditions, 4376 events. 2500/4376 cut-off events. For 19713/19713 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 25403 event pairs, 766 based on Foata normal form. 9/4385 useless extension candidates. Maximal degree in co-relation 18276. Up to 1972 conditions per place. [2024-11-27 20:09:49,064 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 186 selfloop transitions, 58 changer transitions 72/318 dead transitions. [2024-11-27 20:09:49,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 318 transitions, 3717 flow [2024-11-27 20:09:49,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-27 20:09:49,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-27 20:09:49,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 262 transitions. [2024-11-27 20:09:49,067 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5038461538461538 [2024-11-27 20:09:49,067 INFO L175 Difference]: Start difference. First operand has 134 places, 207 transitions, 2357 flow. Second operand 13 states and 262 transitions. [2024-11-27 20:09:49,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 318 transitions, 3717 flow [2024-11-27 20:09:49,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 318 transitions, 3667 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-11-27 20:09:49,157 INFO L231 Difference]: Finished difference. Result has 148 places, 190 transitions, 2311 flow [2024-11-27 20:09:49,158 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2307, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2311, PETRI_PLACES=148, PETRI_TRANSITIONS=190} [2024-11-27 20:09:49,158 INFO L279 CegarLoopForPetriNet]: 40 programPoint places, 108 predicate places. [2024-11-27 20:09:49,158 INFO L471 AbstractCegarLoop]: Abstraction has has 148 places, 190 transitions, 2311 flow [2024-11-27 20:09:49,159 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 14.375) internal successors, (230), 16 states have internal predecessors, (230), 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) [2024-11-27 20:09:49,159 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:09:49,159 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:09:49,170 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b09575e4-a9b8-479f-8119-87740fcb368f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-27 20:09:49,359 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b09575e4-a9b8-479f-8119-87740fcb368f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-27 20:09:49,359 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 20:09:49,360 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:09:49,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1987339866, now seen corresponding path program 3 times [2024-11-27 20:09:49,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:09:49,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848351358] [2024-11-27 20:09:49,360 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 20:09:49,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:09:49,384 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-27 20:09:49,384 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:09:49,738 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:09:49,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:09:49,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848351358] [2024-11-27 20:09:49,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848351358] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:09:49,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714389930] [2024-11-27 20:09:49,738 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 20:09:49,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:09:49,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b09575e4-a9b8-479f-8119-87740fcb368f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:09:49,741 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b09575e4-a9b8-479f-8119-87740fcb368f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:09:49,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b09575e4-a9b8-479f-8119-87740fcb368f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-27 20:09:49,840 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-27 20:09:49,840 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:09:49,842 INFO L256 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-27 20:09:49,845 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:09:49,920 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 1 [2024-11-27 20:09:50,258 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:09:50,259 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:09:50,639 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 87 treesize of output 77 [2024-11-27 20:09:50,693 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 20:09:50,693 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 216 treesize of output 188 [2024-11-27 20:09:52,916 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:09:52,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714389930] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:09:52,917 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 20:09:52,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 24 [2024-11-27 20:09:52,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785811260] [2024-11-27 20:09:52,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 20:09:52,917 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-27 20:09:52,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:09:52,918 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-27 20:09:52,918 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2024-11-27 20:09:53,692 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-11-27 20:09:53,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 190 transitions, 2311 flow. Second operand has 24 states, 24 states have (on average 16.75) internal successors, (402), 24 states have internal predecessors, (402), 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) [2024-11-27 20:09:53,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:09:53,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-11-27 20:09:53,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:09:56,027 INFO L124 PetriNetUnfolderBase]: 2399/4165 cut-off events. [2024-11-27 20:09:56,028 INFO L125 PetriNetUnfolderBase]: For 21345/21345 co-relation queries the response was YES. [2024-11-27 20:09:56,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19448 conditions, 4165 events. 2399/4165 cut-off events. For 21345/21345 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 23542 event pairs, 563 based on Foata normal form. 17/4182 useless extension candidates. Maximal degree in co-relation 19256. Up to 1989 conditions per place. [2024-11-27 20:09:56,050 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 247 selfloop transitions, 89 changer transitions 67/404 dead transitions. [2024-11-27 20:09:56,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 404 transitions, 4470 flow [2024-11-27 20:09:56,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-27 20:09:56,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-11-27 20:09:56,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 668 transitions. [2024-11-27 20:09:56,054 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5566666666666666 [2024-11-27 20:09:56,054 INFO L175 Difference]: Start difference. First operand has 148 places, 190 transitions, 2311 flow. Second operand 30 states and 668 transitions. [2024-11-27 20:09:56,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 404 transitions, 4470 flow [2024-11-27 20:09:56,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 404 transitions, 4177 flow, removed 104 selfloop flow, removed 12 redundant places. [2024-11-27 20:09:56,137 INFO L231 Difference]: Finished difference. Result has 175 places, 211 transitions, 2525 flow [2024-11-27 20:09:56,137 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2131, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=2525, PETRI_PLACES=175, PETRI_TRANSITIONS=211} [2024-11-27 20:09:56,137 INFO L279 CegarLoopForPetriNet]: 40 programPoint places, 135 predicate places. [2024-11-27 20:09:56,138 INFO L471 AbstractCegarLoop]: Abstraction has has 175 places, 211 transitions, 2525 flow [2024-11-27 20:09:56,138 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 16.75) internal successors, (402), 24 states have internal predecessors, (402), 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) [2024-11-27 20:09:56,138 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:09:56,138 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:09:56,146 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b09575e4-a9b8-479f-8119-87740fcb368f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-27 20:09:56,338 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b09575e4-a9b8-479f-8119-87740fcb368f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-11-27 20:09:56,339 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 20:09:56,339 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:09:56,339 INFO L85 PathProgramCache]: Analyzing trace with hash 228123140, now seen corresponding path program 4 times [2024-11-27 20:09:56,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:09:56,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742287705] [2024-11-27 20:09:56,340 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 20:09:56,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:09:56,366 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 20:09:56,366 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:09:56,901 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:09:56,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:09:56,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742287705] [2024-11-27 20:09:56,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742287705] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:09:56,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779344031] [2024-11-27 20:09:56,902 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 20:09:56,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:09:56,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b09575e4-a9b8-479f-8119-87740fcb368f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:09:56,905 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b09575e4-a9b8-479f-8119-87740fcb368f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:09:56,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b09575e4-a9b8-479f-8119-87740fcb368f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-27 20:09:57,011 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 20:09:57,011 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:09:57,013 INFO L256 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-27 20:09:57,019 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:09:57,075 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 1 [2024-11-27 20:09:57,282 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 7 [2024-11-27 20:09:57,290 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:09:57,291 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:09:57,711 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 33 treesize of output 29 [2024-11-27 20:09:57,727 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-27 20:09:57,728 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 62 treesize of output 41 [2024-11-27 20:09:57,876 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:09:57,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779344031] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:09:57,876 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 20:09:57,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 18 [2024-11-27 20:09:57,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870439416] [2024-11-27 20:09:57,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 20:09:57,877 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-27 20:09:57,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:09:57,877 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-27 20:09:57,878 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2024-11-27 20:09:58,706 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-11-27 20:09:58,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 211 transitions, 2525 flow. Second operand has 19 states, 19 states have (on average 18.05263157894737) internal successors, (343), 19 states have internal predecessors, (343), 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) [2024-11-27 20:09:58,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:09:58,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-11-27 20:09:58,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:09:59,825 INFO L124 PetriNetUnfolderBase]: 2116/3713 cut-off events. [2024-11-27 20:09:59,825 INFO L125 PetriNetUnfolderBase]: For 26206/26206 co-relation queries the response was YES. [2024-11-27 20:09:59,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18620 conditions, 3713 events. 2116/3713 cut-off events. For 26206/26206 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 20904 event pairs, 731 based on Foata normal form. 1/3714 useless extension candidates. Maximal degree in co-relation 18411. Up to 2600 conditions per place. [2024-11-27 20:09:59,855 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 163 selfloop transitions, 46 changer transitions 57/268 dead transitions. [2024-11-27 20:09:59,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 268 transitions, 3487 flow [2024-11-27 20:09:59,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-27 20:09:59,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-27 20:09:59,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 257 transitions. [2024-11-27 20:09:59,857 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5840909090909091 [2024-11-27 20:09:59,857 INFO L175 Difference]: Start difference. First operand has 175 places, 211 transitions, 2525 flow. Second operand 11 states and 257 transitions. [2024-11-27 20:09:59,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 268 transitions, 3487 flow [2024-11-27 20:09:59,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 268 transitions, 3290 flow, removed 49 selfloop flow, removed 13 redundant places. [2024-11-27 20:09:59,947 INFO L231 Difference]: Finished difference. Result has 160 places, 186 transitions, 2076 flow [2024-11-27 20:09:59,947 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2348, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2076, PETRI_PLACES=160, PETRI_TRANSITIONS=186} [2024-11-27 20:09:59,948 INFO L279 CegarLoopForPetriNet]: 40 programPoint places, 120 predicate places. [2024-11-27 20:09:59,948 INFO L471 AbstractCegarLoop]: Abstraction has has 160 places, 186 transitions, 2076 flow [2024-11-27 20:09:59,948 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 18.05263157894737) internal successors, (343), 19 states have internal predecessors, (343), 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) [2024-11-27 20:09:59,948 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:09:59,949 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:09:59,957 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b09575e4-a9b8-479f-8119-87740fcb368f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-27 20:10:00,152 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b09575e4-a9b8-479f-8119-87740fcb368f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-11-27 20:10:00,153 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 20:10:00,153 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:10:00,153 INFO L85 PathProgramCache]: Analyzing trace with hash -166411292, now seen corresponding path program 2 times [2024-11-27 20:10:00,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:10:00,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562480388] [2024-11-27 20:10:00,154 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 20:10:00,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:10:00,169 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-27 20:10:00,169 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:10:00,352 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-27 20:10:00,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:10:00,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562480388] [2024-11-27 20:10:00,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562480388] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:10:00,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:10:00,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-27 20:10:00,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648022943] [2024-11-27 20:10:00,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:10:00,353 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-27 20:10:00,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:10:00,354 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-27 20:10:00,354 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-11-27 20:10:00,364 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-11-27 20:10:00,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 186 transitions, 2076 flow. Second operand has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:10:00,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:10:00,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-11-27 20:10:00,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:10:01,192 INFO L124 PetriNetUnfolderBase]: 2107/3589 cut-off events. [2024-11-27 20:10:01,192 INFO L125 PetriNetUnfolderBase]: For 22811/22811 co-relation queries the response was YES. [2024-11-27 20:10:01,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17216 conditions, 3589 events. 2107/3589 cut-off events. For 22811/22811 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 19764 event pairs, 1266 based on Foata normal form. 6/3595 useless extension candidates. Maximal degree in co-relation 17121. Up to 3002 conditions per place. [2024-11-27 20:10:01,216 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 190 selfloop transitions, 35 changer transitions 0/226 dead transitions. [2024-11-27 20:10:01,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 226 transitions, 2801 flow [2024-11-27 20:10:01,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-27 20:10:01,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-27 20:10:01,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-11-27 20:10:01,217 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5821428571428572 [2024-11-27 20:10:01,217 INFO L175 Difference]: Start difference. First operand has 160 places, 186 transitions, 2076 flow. Second operand 7 states and 163 transitions. [2024-11-27 20:10:01,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 226 transitions, 2801 flow [2024-11-27 20:10:01,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 226 transitions, 2664 flow, removed 11 selfloop flow, removed 11 redundant places. [2024-11-27 20:10:01,291 INFO L231 Difference]: Finished difference. Result has 144 places, 190 transitions, 2104 flow [2024-11-27 20:10:01,291 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1950, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2104, PETRI_PLACES=144, PETRI_TRANSITIONS=190} [2024-11-27 20:10:01,292 INFO L279 CegarLoopForPetriNet]: 40 programPoint places, 104 predicate places. [2024-11-27 20:10:01,292 INFO L471 AbstractCegarLoop]: Abstraction has has 144 places, 190 transitions, 2104 flow [2024-11-27 20:10:01,292 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:10:01,292 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:10:01,292 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:10:01,292 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-11-27 20:10:01,292 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 20:10:01,293 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:10:01,293 INFO L85 PathProgramCache]: Analyzing trace with hash -388132620, now seen corresponding path program 3 times [2024-11-27 20:10:01,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:10:01,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767555703] [2024-11-27 20:10:01,293 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 20:10:01,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:10:01,310 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-11-27 20:10:01,311 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:10:01,500 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-27 20:10:01,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:10:01,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767555703] [2024-11-27 20:10:01,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767555703] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:10:01,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:10:01,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-27 20:10:01,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835488257] [2024-11-27 20:10:01,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:10:01,501 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-27 20:10:01,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:10:01,502 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-27 20:10:01,502 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-11-27 20:10:01,508 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-11-27 20:10:01,508 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 190 transitions, 2104 flow. Second operand has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 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) [2024-11-27 20:10:01,508 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:10:01,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-11-27 20:10:01,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:10:02,399 INFO L124 PetriNetUnfolderBase]: 2123/3621 cut-off events. [2024-11-27 20:10:02,399 INFO L125 PetriNetUnfolderBase]: For 20901/20901 co-relation queries the response was YES. [2024-11-27 20:10:02,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17007 conditions, 3621 events. 2123/3621 cut-off events. For 20901/20901 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 20043 event pairs, 1258 based on Foata normal form. 3/3624 useless extension candidates. Maximal degree in co-relation 16917. Up to 3004 conditions per place. [2024-11-27 20:10:02,423 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 196 selfloop transitions, 44 changer transitions 0/241 dead transitions. [2024-11-27 20:10:02,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 241 transitions, 2977 flow [2024-11-27 20:10:02,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-27 20:10:02,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-27 20:10:02,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 201 transitions. [2024-11-27 20:10:02,424 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5583333333333333 [2024-11-27 20:10:02,425 INFO L175 Difference]: Start difference. First operand has 144 places, 190 transitions, 2104 flow. Second operand 9 states and 201 transitions. [2024-11-27 20:10:02,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 241 transitions, 2977 flow [2024-11-27 20:10:02,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 241 transitions, 2919 flow, removed 16 selfloop flow, removed 1 redundant places. [2024-11-27 20:10:02,511 INFO L231 Difference]: Finished difference. Result has 154 places, 200 transitions, 2315 flow [2024-11-27 20:10:02,512 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2063, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2315, PETRI_PLACES=154, PETRI_TRANSITIONS=200} [2024-11-27 20:10:02,512 INFO L279 CegarLoopForPetriNet]: 40 programPoint places, 114 predicate places. [2024-11-27 20:10:02,512 INFO L471 AbstractCegarLoop]: Abstraction has has 154 places, 200 transitions, 2315 flow [2024-11-27 20:10:02,512 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 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) [2024-11-27 20:10:02,512 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:10:02,513 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:10:02,513 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-11-27 20:10:02,513 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 20:10:02,513 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:10:02,513 INFO L85 PathProgramCache]: Analyzing trace with hash -1955024830, now seen corresponding path program 4 times [2024-11-27 20:10:02,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:10:02,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538429789] [2024-11-27 20:10:02,514 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 20:10:02,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:10:02,536 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 20:10:02,536 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:10:02,864 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-27 20:10:02,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:10:02,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538429789] [2024-11-27 20:10:02,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538429789] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:10:02,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782320410] [2024-11-27 20:10:02,865 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 20:10:02,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:10:02,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b09575e4-a9b8-479f-8119-87740fcb368f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:10:02,868 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b09575e4-a9b8-479f-8119-87740fcb368f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:10:02,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b09575e4-a9b8-479f-8119-87740fcb368f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-27 20:10:03,115 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 20:10:03,115 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:10:03,120 INFO L256 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-27 20:10:03,122 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:10:03,253 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-27 20:10:03,253 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:10:03,633 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-27 20:10:03,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782320410] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:10:03,633 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 20:10:03,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2024-11-27 20:10:03,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366755112] [2024-11-27 20:10:03,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 20:10:03,635 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-27 20:10:03,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:10:03,638 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-27 20:10:03,638 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2024-11-27 20:10:03,690 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-11-27 20:10:03,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 200 transitions, 2315 flow. Second operand has 18 states, 18 states have (on average 15.88888888888889) internal successors, (286), 18 states have internal predecessors, (286), 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) [2024-11-27 20:10:03,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:10:03,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-11-27 20:10:03,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:10:08,492 INFO L124 PetriNetUnfolderBase]: 3414/5913 cut-off events. [2024-11-27 20:10:08,493 INFO L125 PetriNetUnfolderBase]: For 36395/36395 co-relation queries the response was YES. [2024-11-27 20:10:08,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28107 conditions, 5913 events. 3414/5913 cut-off events. For 36395/36395 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 37792 event pairs, 600 based on Foata normal form. 49/5962 useless extension candidates. Maximal degree in co-relation 28014. Up to 1776 conditions per place. [2024-11-27 20:10:08,528 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 343 selfloop transitions, 466 changer transitions 1/811 dead transitions. [2024-11-27 20:10:08,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 811 transitions, 8898 flow [2024-11-27 20:10:08,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2024-11-27 20:10:08,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2024-11-27 20:10:08,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 1292 transitions. [2024-11-27 20:10:08,532 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5568965517241379 [2024-11-27 20:10:08,532 INFO L175 Difference]: Start difference. First operand has 154 places, 200 transitions, 2315 flow. Second operand 58 states and 1292 transitions. [2024-11-27 20:10:08,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 811 transitions, 8898 flow [2024-11-27 20:10:08,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 811 transitions, 8785 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-11-27 20:10:08,666 INFO L231 Difference]: Finished difference. Result has 230 places, 599 transitions, 7972 flow [2024-11-27 20:10:08,667 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2242, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=58, PETRI_FLOW=7972, PETRI_PLACES=230, PETRI_TRANSITIONS=599} [2024-11-27 20:10:08,667 INFO L279 CegarLoopForPetriNet]: 40 programPoint places, 190 predicate places. [2024-11-27 20:10:08,667 INFO L471 AbstractCegarLoop]: Abstraction has has 230 places, 599 transitions, 7972 flow [2024-11-27 20:10:08,667 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 15.88888888888889) internal successors, (286), 18 states have internal predecessors, (286), 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) [2024-11-27 20:10:08,668 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:10:08,668 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:10:08,675 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b09575e4-a9b8-479f-8119-87740fcb368f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-27 20:10:08,868 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b09575e4-a9b8-479f-8119-87740fcb368f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-27 20:10:08,868 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 20:10:08,869 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:10:08,869 INFO L85 PathProgramCache]: Analyzing trace with hash -1279127998, now seen corresponding path program 5 times [2024-11-27 20:10:08,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:10:08,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65639204] [2024-11-27 20:10:08,869 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-27 20:10:08,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:10:08,890 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-27 20:10:08,890 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:10:09,146 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-27 20:10:09,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:10:09,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65639204] [2024-11-27 20:10:09,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65639204] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:10:09,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037524436] [2024-11-27 20:10:09,146 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-27 20:10:09,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:10:09,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b09575e4-a9b8-479f-8119-87740fcb368f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:10:09,149 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b09575e4-a9b8-479f-8119-87740fcb368f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:10:09,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b09575e4-a9b8-479f-8119-87740fcb368f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-27 20:10:09,280 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-27 20:10:09,280 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:10:09,284 INFO L256 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-27 20:10:09,285 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:10:09,385 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-27 20:10:09,386 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:10:09,617 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-27 20:10:09,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037524436] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:10:09,617 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 20:10:09,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 15 [2024-11-27 20:10:09,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404934217] [2024-11-27 20:10:09,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 20:10:09,618 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-27 20:10:09,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:10:09,619 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-27 20:10:09,620 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2024-11-27 20:10:09,683 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-11-27 20:10:09,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 599 transitions, 7972 flow. Second operand has 15 states, 15 states have (on average 16.133333333333333) internal successors, (242), 15 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) [2024-11-27 20:10:09,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:10:09,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-11-27 20:10:09,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:10:13,795 INFO L124 PetriNetUnfolderBase]: 3651/6468 cut-off events. [2024-11-27 20:10:13,796 INFO L125 PetriNetUnfolderBase]: For 82065/82065 co-relation queries the response was YES. [2024-11-27 20:10:13,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38492 conditions, 6468 events. 3651/6468 cut-off events. For 82065/82065 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 42704 event pairs, 431 based on Foata normal form. 21/6489 useless extension candidates. Maximal degree in co-relation 38377. Up to 1512 conditions per place. [2024-11-27 20:10:13,845 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 397 selfloop transitions, 426 changer transitions 8/832 dead transitions. [2024-11-27 20:10:13,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 832 transitions, 11968 flow [2024-11-27 20:10:13,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-27 20:10:13,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-11-27 20:10:13,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 556 transitions. [2024-11-27 20:10:13,848 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5148148148148148 [2024-11-27 20:10:13,848 INFO L175 Difference]: Start difference. First operand has 230 places, 599 transitions, 7972 flow. Second operand 27 states and 556 transitions. [2024-11-27 20:10:13,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 832 transitions, 11968 flow [2024-11-27 20:10:14,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 832 transitions, 10288 flow, removed 674 selfloop flow, removed 12 redundant places. [2024-11-27 20:10:14,477 INFO L231 Difference]: Finished difference. Result has 251 places, 688 transitions, 8691 flow [2024-11-27 20:10:14,478 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6581, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=599, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=339, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=8691, PETRI_PLACES=251, PETRI_TRANSITIONS=688} [2024-11-27 20:10:14,478 INFO L279 CegarLoopForPetriNet]: 40 programPoint places, 211 predicate places. [2024-11-27 20:10:14,478 INFO L471 AbstractCegarLoop]: Abstraction has has 251 places, 688 transitions, 8691 flow [2024-11-27 20:10:14,479 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 16.133333333333333) internal successors, (242), 15 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) [2024-11-27 20:10:14,479 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:10:14,479 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:10:14,489 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b09575e4-a9b8-479f-8119-87740fcb368f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-27 20:10:14,679 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b09575e4-a9b8-479f-8119-87740fcb368f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-27 20:10:14,679 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 20:10:14,680 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:10:14,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1129816754, now seen corresponding path program 6 times [2024-11-27 20:10:14,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:10:14,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269976472] [2024-11-27 20:10:14,680 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-27 20:10:14,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:10:14,707 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-27 20:10:14,707 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:10:14,988 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-27 20:10:14,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:10:14,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269976472] [2024-11-27 20:10:14,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269976472] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:10:14,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809456889] [2024-11-27 20:10:14,988 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-27 20:10:14,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:10:14,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b09575e4-a9b8-479f-8119-87740fcb368f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:10:14,991 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b09575e4-a9b8-479f-8119-87740fcb368f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:10:14,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b09575e4-a9b8-479f-8119-87740fcb368f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-27 20:10:15,239 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-27 20:10:15,240 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:10:15,241 INFO L256 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-27 20:10:15,242 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:10:15,357 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-27 20:10:15,357 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:10:15,686 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-27 20:10:15,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809456889] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:10:15,686 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 20:10:15,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2024-11-27 20:10:15,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379111446] [2024-11-27 20:10:15,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 20:10:15,686 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-27 20:10:15,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:10:15,687 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-27 20:10:15,687 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2024-11-27 20:10:15,690 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-11-27 20:10:15,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 688 transitions, 8691 flow. Second operand has 17 states, 17 states have (on average 16.0) internal successors, (272), 17 states have internal predecessors, (272), 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) [2024-11-27 20:10:15,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:10:15,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-11-27 20:10:15,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:10:21,108 INFO L124 PetriNetUnfolderBase]: 4953/8853 cut-off events. [2024-11-27 20:10:21,108 INFO L125 PetriNetUnfolderBase]: For 102086/102086 co-relation queries the response was YES. [2024-11-27 20:10:21,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49730 conditions, 8853 events. 4953/8853 cut-off events. For 102086/102086 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 63328 event pairs, 1083 based on Foata normal form. 36/8887 useless extension candidates. Maximal degree in co-relation 49613. Up to 3597 conditions per place. [2024-11-27 20:10:21,425 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 435 selfloop transitions, 843 changer transitions 5/1284 dead transitions. [2024-11-27 20:10:21,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 1284 transitions, 17952 flow [2024-11-27 20:10:21,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-11-27 20:10:21,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2024-11-27 20:10:21,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 899 transitions. [2024-11-27 20:10:21,428 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5351190476190476 [2024-11-27 20:10:21,428 INFO L175 Difference]: Start difference. First operand has 251 places, 688 transitions, 8691 flow. Second operand 42 states and 899 transitions. [2024-11-27 20:10:21,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 1284 transitions, 17952 flow [2024-11-27 20:10:22,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 1284 transitions, 16975 flow, removed 386 selfloop flow, removed 6 redundant places. [2024-11-27 20:10:22,502 INFO L231 Difference]: Finished difference. Result has 310 places, 1123 transitions, 16965 flow [2024-11-27 20:10:22,502 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8356, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=688, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=474, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=16965, PETRI_PLACES=310, PETRI_TRANSITIONS=1123} [2024-11-27 20:10:22,503 INFO L279 CegarLoopForPetriNet]: 40 programPoint places, 270 predicate places. [2024-11-27 20:10:22,503 INFO L471 AbstractCegarLoop]: Abstraction has has 310 places, 1123 transitions, 16965 flow [2024-11-27 20:10:22,504 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 16.0) internal successors, (272), 17 states have internal predecessors, (272), 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) [2024-11-27 20:10:22,504 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:10:22,504 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:10:22,515 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b09575e4-a9b8-479f-8119-87740fcb368f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-27 20:10:22,704 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b09575e4-a9b8-479f-8119-87740fcb368f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-27 20:10:22,704 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 20:10:22,705 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:10:22,705 INFO L85 PathProgramCache]: Analyzing trace with hash 1744245442, now seen corresponding path program 7 times [2024-11-27 20:10:22,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:10:22,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518142873] [2024-11-27 20:10:22,706 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-27 20:10:22,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:10:22,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:10:22,970 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-27 20:10:22,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:10:22,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518142873] [2024-11-27 20:10:22,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518142873] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:10:22,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205565655] [2024-11-27 20:10:22,971 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-27 20:10:22,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:10:22,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b09575e4-a9b8-479f-8119-87740fcb368f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:10:22,973 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b09575e4-a9b8-479f-8119-87740fcb368f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:10:22,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b09575e4-a9b8-479f-8119-87740fcb368f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-27 20:10:23,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:10:23,096 INFO L256 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-27 20:10:23,097 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:10:23,228 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-27 20:10:23,228 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:10:23,497 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-27 20:10:23,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205565655] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:10:23,498 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 20:10:23,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2024-11-27 20:10:23,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199233537] [2024-11-27 20:10:23,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 20:10:23,499 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-27 20:10:23,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:10:23,500 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-27 20:10:23,500 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2024-11-27 20:10:23,533 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-11-27 20:10:23,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 1123 transitions, 16965 flow. Second operand has 17 states, 17 states have (on average 16.058823529411764) internal successors, (273), 17 states have internal predecessors, (273), 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) [2024-11-27 20:10:23,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:10:23,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-11-27 20:10:23,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:10:30,323 INFO L124 PetriNetUnfolderBase]: 6878/12388 cut-off events. [2024-11-27 20:10:30,323 INFO L125 PetriNetUnfolderBase]: For 99877/99877 co-relation queries the response was YES. [2024-11-27 20:10:30,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74696 conditions, 12388 events. 6878/12388 cut-off events. For 99877/99877 co-relation queries the response was YES. Maximal size of possible extension queue 520. Compared 92223 event pairs, 613 based on Foata normal form. 15/12403 useless extension candidates. Maximal degree in co-relation 74558. Up to 2171 conditions per place. [2024-11-27 20:10:30,643 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 688 selfloop transitions, 1223 changer transitions 0/1912 dead transitions. [2024-11-27 20:10:30,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 1912 transitions, 30839 flow [2024-11-27 20:10:30,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-27 20:10:30,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2024-11-27 20:10:30,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 735 transitions. [2024-11-27 20:10:30,646 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5568181818181818 [2024-11-27 20:10:30,646 INFO L175 Difference]: Start difference. First operand has 310 places, 1123 transitions, 16965 flow. Second operand 33 states and 735 transitions. [2024-11-27 20:10:30,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 1912 transitions, 30839 flow [2024-11-27 20:10:32,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 1912 transitions, 29930 flow, removed 408 selfloop flow, removed 3 redundant places. [2024-11-27 20:10:32,498 INFO L231 Difference]: Finished difference. Result has 360 places, 1645 transitions, 28601 flow [2024-11-27 20:10:32,499 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=16395, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=739, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=28601, PETRI_PLACES=360, PETRI_TRANSITIONS=1645} [2024-11-27 20:10:32,499 INFO L279 CegarLoopForPetriNet]: 40 programPoint places, 320 predicate places. [2024-11-27 20:10:32,499 INFO L471 AbstractCegarLoop]: Abstraction has has 360 places, 1645 transitions, 28601 flow [2024-11-27 20:10:32,500 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 16.058823529411764) internal successors, (273), 17 states have internal predecessors, (273), 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) [2024-11-27 20:10:32,500 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:10:32,500 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:10:32,507 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b09575e4-a9b8-479f-8119-87740fcb368f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-27 20:10:32,700 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b09575e4-a9b8-479f-8119-87740fcb368f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:10:32,700 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 20:10:32,701 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:10:32,701 INFO L85 PathProgramCache]: Analyzing trace with hash -854602808, now seen corresponding path program 8 times [2024-11-27 20:10:32,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:10:32,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923434446] [2024-11-27 20:10:32,701 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 20:10:32,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:10:32,714 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-27 20:10:32,714 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:10:32,908 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-27 20:10:32,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:10:32,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923434446] [2024-11-27 20:10:32,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923434446] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:10:32,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:10:32,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-27 20:10:32,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389637816] [2024-11-27 20:10:32,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:10:32,910 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-27 20:10:32,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:10:32,910 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-27 20:10:32,910 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-27 20:10:32,932 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-11-27 20:10:32,932 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 1645 transitions, 28601 flow. Second operand has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 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) [2024-11-27 20:10:32,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:10:32,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-11-27 20:10:32,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:10:40,808 INFO L124 PetriNetUnfolderBase]: 6420/11852 cut-off events. [2024-11-27 20:10:40,808 INFO L125 PetriNetUnfolderBase]: For 129367/129367 co-relation queries the response was YES. [2024-11-27 20:10:40,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81976 conditions, 11852 events. 6420/11852 cut-off events. For 129367/129367 co-relation queries the response was YES. Maximal size of possible extension queue 543. Compared 90960 event pairs, 2597 based on Foata normal form. 6/11840 useless extension candidates. Maximal degree in co-relation 81819. Up to 9513 conditions per place. [2024-11-27 20:10:41,005 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 1474 selfloop transitions, 257 changer transitions 2/1737 dead transitions. [2024-11-27 20:10:41,005 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 1737 transitions, 33350 flow [2024-11-27 20:10:41,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-27 20:10:41,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-27 20:10:41,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 264 transitions. [2024-11-27 20:10:41,007 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-11-27 20:10:41,007 INFO L175 Difference]: Start difference. First operand has 360 places, 1645 transitions, 28601 flow. Second operand 11 states and 264 transitions. [2024-11-27 20:10:41,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 1737 transitions, 33350 flow [2024-11-27 20:10:45,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 1737 transitions, 32580 flow, removed 240 selfloop flow, removed 4 redundant places. [2024-11-27 20:10:45,107 INFO L231 Difference]: Finished difference. Result has 369 places, 1667 transitions, 29020 flow [2024-11-27 20:10:45,108 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=27879, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1645, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=235, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=29020, PETRI_PLACES=369, PETRI_TRANSITIONS=1667} [2024-11-27 20:10:45,109 INFO L279 CegarLoopForPetriNet]: 40 programPoint places, 329 predicate places. [2024-11-27 20:10:45,109 INFO L471 AbstractCegarLoop]: Abstraction has has 369 places, 1667 transitions, 29020 flow [2024-11-27 20:10:45,109 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 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) [2024-11-27 20:10:45,109 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:10:45,109 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:10:45,110 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-11-27 20:10:45,110 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 20:10:45,110 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:10:45,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1257785866, now seen corresponding path program 9 times [2024-11-27 20:10:45,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:10:45,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669439880] [2024-11-27 20:10:45,111 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 20:10:45,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:10:45,127 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-27 20:10:45,127 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:10:45,411 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-27 20:10:45,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:10:45,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669439880] [2024-11-27 20:10:45,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669439880] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:10:45,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634583955] [2024-11-27 20:10:45,412 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 20:10:45,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:10:45,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b09575e4-a9b8-479f-8119-87740fcb368f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:10:45,415 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b09575e4-a9b8-479f-8119-87740fcb368f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:10:45,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b09575e4-a9b8-479f-8119-87740fcb368f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-27 20:10:45,562 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-27 20:10:45,563 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:10:45,564 INFO L256 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-27 20:10:45,565 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:10:45,715 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-27 20:10:45,716 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:10:45,896 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-27 20:10:45,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634583955] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:10:45,896 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 20:10:45,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2024-11-27 20:10:45,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229791370] [2024-11-27 20:10:45,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 20:10:45,897 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-27 20:10:45,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:10:45,898 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-27 20:10:45,898 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2024-11-27 20:10:45,913 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-11-27 20:10:45,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 1667 transitions, 29020 flow. Second operand has 18 states, 18 states have (on average 15.88888888888889) internal successors, (286), 18 states have internal predecessors, (286), 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) [2024-11-27 20:10:45,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:10:45,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-11-27 20:10:45,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:10:58,868 INFO L124 PetriNetUnfolderBase]: 9524/16979 cut-off events. [2024-11-27 20:10:58,868 INFO L125 PetriNetUnfolderBase]: For 178586/178586 co-relation queries the response was YES. [2024-11-27 20:10:59,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115381 conditions, 16979 events. 9524/16979 cut-off events. For 178586/178586 co-relation queries the response was YES. Maximal size of possible extension queue 644. Compared 128899 event pairs, 568 based on Foata normal form. 274/17253 useless extension candidates. Maximal degree in co-relation 115221. Up to 2966 conditions per place. [2024-11-27 20:10:59,144 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 825 selfloop transitions, 1795 changer transitions 0/2621 dead transitions. [2024-11-27 20:10:59,145 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 2621 transitions, 48055 flow [2024-11-27 20:10:59,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-11-27 20:10:59,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2024-11-27 20:10:59,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 959 transitions. [2024-11-27 20:10:59,147 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5448863636363637 [2024-11-27 20:10:59,147 INFO L175 Difference]: Start difference. First operand has 369 places, 1667 transitions, 29020 flow. Second operand 44 states and 959 transitions. [2024-11-27 20:10:59,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 2621 transitions, 48055 flow [2024-11-27 20:11:04,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 2621 transitions, 47636 flow, removed 68 selfloop flow, removed 4 redundant places. [2024-11-27 20:11:05,016 INFO L231 Difference]: Finished difference. Result has 431 places, 2297 transitions, 46164 flow [2024-11-27 20:11:05,017 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=28326, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1644, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1208, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=46164, PETRI_PLACES=431, PETRI_TRANSITIONS=2297} [2024-11-27 20:11:05,018 INFO L279 CegarLoopForPetriNet]: 40 programPoint places, 391 predicate places. [2024-11-27 20:11:05,018 INFO L471 AbstractCegarLoop]: Abstraction has has 431 places, 2297 transitions, 46164 flow [2024-11-27 20:11:05,019 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 15.88888888888889) internal successors, (286), 18 states have internal predecessors, (286), 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) [2024-11-27 20:11:05,019 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:11:05,019 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:11:05,030 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b09575e4-a9b8-479f-8119-87740fcb368f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-27 20:11:05,219 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b09575e4-a9b8-479f-8119-87740fcb368f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2024-11-27 20:11:05,220 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 20:11:05,220 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:11:05,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1845231, now seen corresponding path program 5 times [2024-11-27 20:11:05,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:11:05,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628251269] [2024-11-27 20:11:05,220 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-27 20:11:05,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:11:05,247 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-27 20:11:05,247 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:11:05,505 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-27 20:11:05,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:11:05,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628251269] [2024-11-27 20:11:05,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628251269] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:11:05,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218591329] [2024-11-27 20:11:05,506 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-27 20:11:05,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:11:05,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b09575e4-a9b8-479f-8119-87740fcb368f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:11:05,508 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b09575e4-a9b8-479f-8119-87740fcb368f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:11:05,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b09575e4-a9b8-479f-8119-87740fcb368f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-27 20:11:05,631 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-27 20:11:05,631 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:11:05,632 INFO L256 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-27 20:11:05,634 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:11:05,771 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-27 20:11:05,772 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:11:05,970 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-27 20:11:05,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218591329] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-27 20:11:05,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-27 20:11:05,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9, 7] total 16 [2024-11-27 20:11:05,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114740079] [2024-11-27 20:11:05,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:11:05,971 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-27 20:11:05,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:11:05,972 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-27 20:11:05,972 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2024-11-27 20:11:05,985 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-11-27 20:11:05,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 2297 transitions, 46164 flow. Second operand has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:11:05,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:11:05,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-11-27 20:11:05,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:11:19,943 INFO L124 PetriNetUnfolderBase]: 8760/16053 cut-off events. [2024-11-27 20:11:19,943 INFO L125 PetriNetUnfolderBase]: For 216832/216836 co-relation queries the response was YES. [2024-11-27 20:11:20,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122857 conditions, 16053 events. 8760/16053 cut-off events. For 216832/216836 co-relation queries the response was YES. Maximal size of possible extension queue 644. Compared 126017 event pairs, 1058 based on Foata normal form. 22/16068 useless extension candidates. Maximal degree in co-relation 122673. Up to 12462 conditions per place. [2024-11-27 20:11:20,285 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 1656 selfloop transitions, 671 changer transitions 2/2333 dead transitions. [2024-11-27 20:11:20,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 2333 transitions, 51148 flow [2024-11-27 20:11:20,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-27 20:11:20,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-27 20:11:20,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-11-27 20:11:20,286 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6321428571428571 [2024-11-27 20:11:20,286 INFO L175 Difference]: Start difference. First operand has 431 places, 2297 transitions, 46164 flow. Second operand 7 states and 177 transitions. [2024-11-27 20:11:20,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 2333 transitions, 51148 flow [2024-11-27 20:11:29,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 2333 transitions, 50284 flow, removed 351 selfloop flow, removed 2 redundant places. [2024-11-27 20:11:29,677 INFO L231 Difference]: Finished difference. Result has 439 places, 2301 transitions, 48057 flow [2024-11-27 20:11:29,679 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=45182, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=662, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1622, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=48057, PETRI_PLACES=439, PETRI_TRANSITIONS=2301} [2024-11-27 20:11:29,680 INFO L279 CegarLoopForPetriNet]: 40 programPoint places, 399 predicate places. [2024-11-27 20:11:29,680 INFO L471 AbstractCegarLoop]: Abstraction has has 439 places, 2301 transitions, 48057 flow [2024-11-27 20:11:29,680 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:11:29,680 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:11:29,681 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:11:29,692 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b09575e4-a9b8-479f-8119-87740fcb368f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-27 20:11:29,881 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b09575e4-a9b8-479f-8119-87740fcb368f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2024-11-27 20:11:29,881 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 20:11:29,882 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:11:29,882 INFO L85 PathProgramCache]: Analyzing trace with hash -183337795, now seen corresponding path program 6 times [2024-11-27 20:11:29,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:11:29,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448447024] [2024-11-27 20:11:29,882 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-27 20:11:29,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:11:29,911 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-27 20:11:29,911 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:11:30,162 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-27 20:11:30,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:11:30,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448447024] [2024-11-27 20:11:30,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448447024] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:11:30,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432741826] [2024-11-27 20:11:30,165 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-27 20:11:30,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:11:30,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b09575e4-a9b8-479f-8119-87740fcb368f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:11:30,167 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b09575e4-a9b8-479f-8119-87740fcb368f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:11:30,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b09575e4-a9b8-479f-8119-87740fcb368f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-27 20:11:30,366 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-27 20:11:30,366 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:11:30,368 INFO L256 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-27 20:11:30,369 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:11:30,430 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-27 20:11:30,430 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:11:30,612 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-27 20:11:30,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432741826] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:11:30,612 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 20:11:30,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-11-27 20:11:30,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065777776] [2024-11-27 20:11:30,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 20:11:30,614 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-27 20:11:30,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:11:30,614 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-27 20:11:30,615 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-11-27 20:11:30,622 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-11-27 20:11:30,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 2301 transitions, 48057 flow. Second operand has 12 states, 12 states have (on average 16.583333333333332) internal successors, (199), 12 states have internal predecessors, (199), 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) [2024-11-27 20:11:30,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:11:30,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-11-27 20:11:30,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:11:47,030 INFO L124 PetriNetUnfolderBase]: 10424/18532 cut-off events. [2024-11-27 20:11:47,030 INFO L125 PetriNetUnfolderBase]: For 259821/259821 co-relation queries the response was YES. [2024-11-27 20:11:47,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143227 conditions, 18532 events. 10424/18532 cut-off events. For 259821/259821 co-relation queries the response was YES. Maximal size of possible extension queue 677. Compared 142828 event pairs, 1127 based on Foata normal form. 16/18548 useless extension candidates. Maximal degree in co-relation 143039. Up to 5822 conditions per place. [2024-11-27 20:11:47,637 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 1339 selfloop transitions, 1237 changer transitions 0/2577 dead transitions. [2024-11-27 20:11:47,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 2577 transitions, 57486 flow [2024-11-27 20:11:47,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-27 20:11:47,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-11-27 20:11:47,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 487 transitions. [2024-11-27 20:11:47,638 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.553409090909091 [2024-11-27 20:11:47,639 INFO L175 Difference]: Start difference. First operand has 439 places, 2301 transitions, 48057 flow. Second operand 22 states and 487 transitions. [2024-11-27 20:11:47,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 2577 transitions, 57486 flow [2024-11-27 20:11:58,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 460 places, 2577 transitions, 57450 flow, removed 18 selfloop flow, removed 0 redundant places. [2024-11-27 20:11:58,535 INFO L231 Difference]: Finished difference. Result has 469 places, 2445 transitions, 54877 flow [2024-11-27 20:11:58,536 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=47935, PETRI_DIFFERENCE_MINUEND_PLACES=439, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1098, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=54877, PETRI_PLACES=469, PETRI_TRANSITIONS=2445} [2024-11-27 20:11:58,536 INFO L279 CegarLoopForPetriNet]: 40 programPoint places, 429 predicate places. [2024-11-27 20:11:58,537 INFO L471 AbstractCegarLoop]: Abstraction has has 469 places, 2445 transitions, 54877 flow [2024-11-27 20:11:58,537 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 16.583333333333332) internal successors, (199), 12 states have internal predecessors, (199), 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) [2024-11-27 20:11:58,537 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:11:58,537 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:11:58,545 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b09575e4-a9b8-479f-8119-87740fcb368f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-11-27 20:11:58,737 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b09575e4-a9b8-479f-8119-87740fcb368f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2024-11-27 20:11:58,737 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 20:11:58,738 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:11:58,738 INFO L85 PathProgramCache]: Analyzing trace with hash -719987720, now seen corresponding path program 1 times [2024-11-27 20:11:58,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:11:58,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856810572] [2024-11-27 20:11:58,738 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:11:58,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:11:58,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:11:59,053 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-27 20:11:59,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:11:59,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856810572] [2024-11-27 20:11:59,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856810572] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:11:59,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651998587] [2024-11-27 20:11:59,055 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:11:59,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:11:59,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b09575e4-a9b8-479f-8119-87740fcb368f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:11:59,057 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b09575e4-a9b8-479f-8119-87740fcb368f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:11:59,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b09575e4-a9b8-479f-8119-87740fcb368f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-27 20:11:59,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:11:59,178 INFO L256 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-27 20:11:59,180 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:11:59,377 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-27 20:11:59,377 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:11:59,761 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-27 20:11:59,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651998587] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:11:59,762 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 20:11:59,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 10] total 20 [2024-11-27 20:11:59,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33137918] [2024-11-27 20:11:59,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 20:11:59,763 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-27 20:11:59,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:11:59,763 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-27 20:11:59,763 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2024-11-27 20:11:59,767 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-11-27 20:11:59,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 469 places, 2445 transitions, 54877 flow. Second operand has 20 states, 20 states have (on average 15.9) internal successors, (318), 20 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:11:59,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:11:59,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-11-27 20:11:59,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand