./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/parallel-ticket-6.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8d08d44-c15f-4895-a76c-2d23d385f050/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8d08d44-c15f-4895-a76c-2d23d385f050/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8d08d44-c15f-4895-a76c-2d23d385f050/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8d08d44-c15f-4895-a76c-2d23d385f050/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/parallel-ticket-6.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8d08d44-c15f-4895-a76c-2d23d385f050/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8d08d44-c15f-4895-a76c-2d23d385f050/bin/uautomizer-verify-BQ2R08f2Ya --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 0cfb19cf4d2e91498cc6b9015bdada7a33dfe09887340d8a9d79513b784b8b5a --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 02:47:08,380 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 02:47:08,440 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8d08d44-c15f-4895-a76c-2d23d385f050/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-29 02:47:08,444 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 02:47:08,445 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 02:47:08,468 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 02:47:08,468 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 02:47:08,469 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 02:47:08,469 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 02:47:08,470 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 02:47:08,470 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 02:47:08,471 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 02:47:08,472 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 02:47:08,472 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 02:47:08,473 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 02:47:08,473 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 02:47:08,474 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 02:47:08,474 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 02:47:08,475 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 02:47:08,475 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 02:47:08,476 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-29 02:47:08,476 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-29 02:47:08,477 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-29 02:47:08,477 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 02:47:08,477 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-29 02:47:08,478 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-29 02:47:08,478 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 02:47:08,478 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 02:47:08,478 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 02:47:08,479 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 02:47:08,479 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 02:47:08,479 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 02:47:08,480 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 02:47:08,480 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 02:47:08,480 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 02:47:08,480 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 02:47:08,480 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 02:47:08,480 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 02:47:08,481 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 02:47:08,481 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 02:47:08,481 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 02:47:08,481 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8d08d44-c15f-4895-a76c-2d23d385f050/bin/uautomizer-verify-BQ2R08f2Ya/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8d08d44-c15f-4895-a76c-2d23d385f050/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0cfb19cf4d2e91498cc6b9015bdada7a33dfe09887340d8a9d79513b784b8b5a [2023-11-29 02:47:08,705 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 02:47:08,725 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 02:47:08,727 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 02:47:08,728 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 02:47:08,729 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 02:47:08,730 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8d08d44-c15f-4895-a76c-2d23d385f050/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/weaver/parallel-ticket-6.wvr.c [2023-11-29 02:47:11,471 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 02:47:11,676 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 02:47:11,676 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8d08d44-c15f-4895-a76c-2d23d385f050/sv-benchmarks/c/weaver/parallel-ticket-6.wvr.c [2023-11-29 02:47:11,684 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8d08d44-c15f-4895-a76c-2d23d385f050/bin/uautomizer-verify-BQ2R08f2Ya/data/971e911e0/e18a884c277342fbb373cd3dfc2d53b5/FLAG90cd0cd64 [2023-11-29 02:47:11,700 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8d08d44-c15f-4895-a76c-2d23d385f050/bin/uautomizer-verify-BQ2R08f2Ya/data/971e911e0/e18a884c277342fbb373cd3dfc2d53b5 [2023-11-29 02:47:11,702 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 02:47:11,704 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 02:47:11,705 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 02:47:11,705 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 02:47:11,710 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 02:47:11,710 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 02:47:11" (1/1) ... [2023-11-29 02:47:11,711 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@626eb5c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:47:11, skipping insertion in model container [2023-11-29 02:47:11,712 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 02:47:11" (1/1) ... [2023-11-29 02:47:11,737 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 02:47:11,909 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 02:47:11,921 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 02:47:11,955 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 02:47:11,963 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 02:47:11,963 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 02:47:11,970 INFO L206 MainTranslator]: Completed translation [2023-11-29 02:47:11,971 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:47:11 WrapperNode [2023-11-29 02:47:11,971 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 02:47:11,972 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 02:47:11,972 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 02:47:11,972 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 02:47:11,978 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:47:11" (1/1) ... [2023-11-29 02:47:11,987 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:47:11" (1/1) ... [2023-11-29 02:47:12,012 INFO L138 Inliner]: procedures = 25, calls = 101, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 295 [2023-11-29 02:47:12,012 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 02:47:12,013 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 02:47:12,013 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 02:47:12,013 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 02:47:12,022 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:47:11" (1/1) ... [2023-11-29 02:47:12,022 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:47:11" (1/1) ... [2023-11-29 02:47:12,027 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:47:11" (1/1) ... [2023-11-29 02:47:12,047 INFO L175 MemorySlicer]: Split 14 memory accesses to 7 slices as follows [2, 2, 2, 2, 2, 2, 2]. 14 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0, 0, 0]. The 6 writes are split as follows [0, 1, 1, 1, 1, 1, 1]. [2023-11-29 02:47:12,048 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:47:11" (1/1) ... [2023-11-29 02:47:12,048 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:47:11" (1/1) ... [2023-11-29 02:47:12,060 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:47:11" (1/1) ... [2023-11-29 02:47:12,062 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:47:11" (1/1) ... [2023-11-29 02:47:12,065 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:47:11" (1/1) ... [2023-11-29 02:47:12,067 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:47:11" (1/1) ... [2023-11-29 02:47:12,073 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 02:47:12,074 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 02:47:12,074 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 02:47:12,074 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 02:47:12,075 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:47:11" (1/1) ... [2023-11-29 02:47:12,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 02:47:12,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8d08d44-c15f-4895-a76c-2d23d385f050/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:47:12,107 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8d08d44-c15f-4895-a76c-2d23d385f050/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 02:47:12,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8d08d44-c15f-4895-a76c-2d23d385f050/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 02:47:12,143 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 02:47:12,144 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 02:47:12,144 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 02:47:12,144 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 02:47:12,144 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 02:47:12,144 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-29 02:47:12,145 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-29 02:47:12,145 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2023-11-29 02:47:12,145 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2023-11-29 02:47:12,145 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 02:47:12,145 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 02:47:12,145 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-29 02:47:12,146 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-29 02:47:12,146 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-29 02:47:12,146 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2023-11-29 02:47:12,146 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2023-11-29 02:47:12,146 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-29 02:47:12,146 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-29 02:47:12,146 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-29 02:47:12,146 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-29 02:47:12,147 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-29 02:47:12,147 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-29 02:47:12,147 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-11-29 02:47:12,147 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-11-29 02:47:12,147 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 02:47:12,147 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 02:47:12,148 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 02:47:12,148 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-29 02:47:12,148 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-29 02:47:12,148 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2023-11-29 02:47:12,148 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2023-11-29 02:47:12,148 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2023-11-29 02:47:12,148 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2023-11-29 02:47:12,148 INFO L130 BoogieDeclarations]: Found specification of procedure thread6 [2023-11-29 02:47:12,149 INFO L138 BoogieDeclarations]: Found implementation of procedure thread6 [2023-11-29 02:47:12,149 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-29 02:47:12,149 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-29 02:47:12,149 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 02:47:12,149 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 02:47:12,149 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 02:47:12,151 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-29 02:47:12,287 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 02:47:12,289 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 02:47:12,657 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 02:47:12,999 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 02:47:12,999 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-29 02:47:12,999 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 02:47:12 BoogieIcfgContainer [2023-11-29 02:47:13,000 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 02:47:13,002 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 02:47:13,002 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 02:47:13,005 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 02:47:13,006 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 02:47:11" (1/3) ... [2023-11-29 02:47:13,006 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c3e3fee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 02:47:13, skipping insertion in model container [2023-11-29 02:47:13,006 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:47:11" (2/3) ... [2023-11-29 02:47:13,007 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c3e3fee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 02:47:13, skipping insertion in model container [2023-11-29 02:47:13,007 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 02:47:12" (3/3) ... [2023-11-29 02:47:13,008 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-ticket-6.wvr.c [2023-11-29 02:47:13,027 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 02:47:13,028 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 26 error locations. [2023-11-29 02:47:13,028 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-29 02:47:13,092 INFO L144 ThreadInstanceAdder]: Constructed 6 joinOtherThreadTransitions. [2023-11-29 02:47:13,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 127 places, 108 transitions, 258 flow [2023-11-29 02:47:13,165 INFO L124 PetriNetUnfolderBase]: 0/102 cut-off events. [2023-11-29 02:47:13,166 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-29 02:47:13,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127 conditions, 102 events. 0/102 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 210 event pairs, 0 based on Foata normal form. 0/76 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2023-11-29 02:47:13,168 INFO L82 GeneralOperation]: Start removeDead. Operand has 127 places, 108 transitions, 258 flow [2023-11-29 02:47:13,173 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 120 places, 101 transitions, 238 flow [2023-11-29 02:47:13,183 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 02:47:13,189 INFO L357 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, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@43894963, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 02:47:13,189 INFO L358 AbstractCegarLoop]: Starting to check reachability of 32 error locations. [2023-11-29 02:47:13,193 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 02:47:13,193 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-11-29 02:47:13,193 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 02:47:13,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:47:13,194 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-29 02:47:13,194 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-11-29 02:47:13,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:47:13,199 INFO L85 PathProgramCache]: Analyzing trace with hash 18790, now seen corresponding path program 1 times [2023-11-29 02:47:13,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:47:13,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611207014] [2023-11-29 02:47:13,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:47:13,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:47:13,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:47:13,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:47:13,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:47:13,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611207014] [2023-11-29 02:47:13,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611207014] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:47:13,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:47:13,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 02:47:13,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395331820] [2023-11-29 02:47:13,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:47:13,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:47:13,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:47:13,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:47:13,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:47:13,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 108 [2023-11-29 02:47:13,810 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 101 transitions, 238 flow. Second operand has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 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) [2023-11-29 02:47:13,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:47:13,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 108 [2023-11-29 02:47:13,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:47:40,567 INFO L124 PetriNetUnfolderBase]: 253908/348129 cut-off events. [2023-11-29 02:47:40,567 INFO L125 PetriNetUnfolderBase]: For 13623/13623 co-relation queries the response was YES. [2023-11-29 02:47:41,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 672357 conditions, 348129 events. 253908/348129 cut-off events. For 13623/13623 co-relation queries the response was YES. Maximal size of possible extension queue 9739. Compared 2655237 event pairs, 253908 based on Foata normal form. 1/332883 useless extension candidates. Maximal degree in co-relation 615311. Up to 312502 conditions per place. [2023-11-29 02:47:42,987 INFO L140 encePairwiseOnDemand]: 104/108 looper letters, 45 selfloop transitions, 1 changer transitions 0/97 dead transitions. [2023-11-29 02:47:42,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 97 transitions, 322 flow [2023-11-29 02:47:42,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:47:42,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 02:47:42,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 223 transitions. [2023-11-29 02:47:43,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6882716049382716 [2023-11-29 02:47:43,001 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 223 transitions. [2023-11-29 02:47:43,001 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 223 transitions. [2023-11-29 02:47:43,002 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:47:43,006 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 223 transitions. [2023-11-29 02:47:43,009 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 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) [2023-11-29 02:47:43,015 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 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) [2023-11-29 02:47:43,015 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 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) [2023-11-29 02:47:43,017 INFO L175 Difference]: Start difference. First operand has 120 places, 101 transitions, 238 flow. Second operand 3 states and 223 transitions. [2023-11-29 02:47:43,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 97 transitions, 322 flow [2023-11-29 02:47:44,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 97 transitions, 298 flow, removed 0 selfloop flow, removed 12 redundant places. [2023-11-29 02:47:44,409 INFO L231 Difference]: Finished difference. Result has 106 places, 97 transitions, 208 flow [2023-11-29 02:47:44,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=208, PETRI_PLACES=106, PETRI_TRANSITIONS=97} [2023-11-29 02:47:44,413 INFO L281 CegarLoopForPetriNet]: 120 programPoint places, -14 predicate places. [2023-11-29 02:47:44,414 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 97 transitions, 208 flow [2023-11-29 02:47:44,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 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) [2023-11-29 02:47:44,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:47:44,414 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-29 02:47:44,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 02:47:44,415 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-11-29 02:47:44,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:47:44,415 INFO L85 PathProgramCache]: Analyzing trace with hash 18791, now seen corresponding path program 1 times [2023-11-29 02:47:44,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:47:44,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418822526] [2023-11-29 02:47:44,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:47:44,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:47:44,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:47:44,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:47:44,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:47:44,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418822526] [2023-11-29 02:47:44,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418822526] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:47:44,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:47:44,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 02:47:44,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39862634] [2023-11-29 02:47:44,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:47:44,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:47:44,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:47:44,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:47:44,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:47:44,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 108 [2023-11-29 02:47:44,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 97 transitions, 208 flow. Second operand has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 3 states have internal predecessors, (182), 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) [2023-11-29 02:47:44,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:47:44,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 108 [2023-11-29 02:47:44,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:48:01,599 INFO L124 PetriNetUnfolderBase]: 178908/245019 cut-off events. [2023-11-29 02:48:01,599 INFO L125 PetriNetUnfolderBase]: For 3905/3912 co-relation queries the response was YES. [2023-11-29 02:48:01,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 470805 conditions, 245019 events. 178908/245019 cut-off events. For 3905/3912 co-relation queries the response was YES. Maximal size of possible extension queue 7101. Compared 1821701 event pairs, 178908 based on Foata normal form. 15626/250953 useless extension candidates. Maximal degree in co-relation 470799. Up to 221876 conditions per place. [2023-11-29 02:48:02,965 INFO L140 encePairwiseOnDemand]: 105/108 looper letters, 43 selfloop transitions, 1 changer transitions 0/95 dead transitions. [2023-11-29 02:48:02,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 95 transitions, 292 flow [2023-11-29 02:48:02,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:48:02,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 02:48:02,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 226 transitions. [2023-11-29 02:48:02,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6975308641975309 [2023-11-29 02:48:02,969 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 226 transitions. [2023-11-29 02:48:02,969 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 226 transitions. [2023-11-29 02:48:02,970 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:48:02,970 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 226 transitions. [2023-11-29 02:48:02,971 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 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) [2023-11-29 02:48:02,973 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 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) [2023-11-29 02:48:02,974 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 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) [2023-11-29 02:48:02,974 INFO L175 Difference]: Start difference. First operand has 106 places, 97 transitions, 208 flow. Second operand 3 states and 226 transitions. [2023-11-29 02:48:02,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 95 transitions, 292 flow [2023-11-29 02:48:02,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 95 transitions, 291 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 02:48:02,978 INFO L231 Difference]: Finished difference. Result has 105 places, 95 transitions, 205 flow [2023-11-29 02:48:02,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=203, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=205, PETRI_PLACES=105, PETRI_TRANSITIONS=95} [2023-11-29 02:48:02,979 INFO L281 CegarLoopForPetriNet]: 120 programPoint places, -15 predicate places. [2023-11-29 02:48:02,979 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 95 transitions, 205 flow [2023-11-29 02:48:02,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 3 states have internal predecessors, (182), 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) [2023-11-29 02:48:02,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:48:02,980 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-29 02:48:02,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 02:48:02,980 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-11-29 02:48:02,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:48:02,981 INFO L85 PathProgramCache]: Analyzing trace with hash 560409311, now seen corresponding path program 1 times [2023-11-29 02:48:02,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:48:02,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870773835] [2023-11-29 02:48:02,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:48:02,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:48:03,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:48:03,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:48:03,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:48:03,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870773835] [2023-11-29 02:48:03,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870773835] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:48:03,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:48:03,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 02:48:03,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209815787] [2023-11-29 02:48:03,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:48:03,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:48:03,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:48:03,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:48:03,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:48:03,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 108 [2023-11-29 02:48:03,173 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 95 transitions, 205 flow. Second operand has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 3 states have internal predecessors, (178), 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) [2023-11-29 02:48:03,173 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:48:03,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 108 [2023-11-29 02:48:03,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:48:20,166 INFO L124 PetriNetUnfolderBase]: 191412/261133 cut-off events. [2023-11-29 02:48:20,166 INFO L125 PetriNetUnfolderBase]: For 3706/3706 co-relation queries the response was YES. [2023-11-29 02:48:20,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 502554 conditions, 261133 events. 191412/261133 cut-off events. For 3706/3706 co-relation queries the response was YES. Maximal size of possible extension queue 7155. Compared 1917903 event pairs, 191412 based on Foata normal form. 0/251765 useless extension candidates. Maximal degree in co-relation 502547. Up to 237510 conditions per place. [2023-11-29 02:48:21,471 INFO L140 encePairwiseOnDemand]: 105/108 looper letters, 45 selfloop transitions, 1 changer transitions 0/93 dead transitions. [2023-11-29 02:48:21,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 93 transitions, 293 flow [2023-11-29 02:48:21,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:48:21,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 02:48:21,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 222 transitions. [2023-11-29 02:48:21,474 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6851851851851852 [2023-11-29 02:48:21,474 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 222 transitions. [2023-11-29 02:48:21,474 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 222 transitions. [2023-11-29 02:48:21,474 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:48:21,475 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 222 transitions. [2023-11-29 02:48:21,476 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 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) [2023-11-29 02:48:21,478 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 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) [2023-11-29 02:48:21,478 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 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) [2023-11-29 02:48:21,478 INFO L175 Difference]: Start difference. First operand has 105 places, 95 transitions, 205 flow. Second operand 3 states and 222 transitions. [2023-11-29 02:48:21,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 93 transitions, 293 flow [2023-11-29 02:48:21,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 93 transitions, 292 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 02:48:21,482 INFO L231 Difference]: Finished difference. Result has 104 places, 93 transitions, 202 flow [2023-11-29 02:48:21,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=202, PETRI_PLACES=104, PETRI_TRANSITIONS=93} [2023-11-29 02:48:21,484 INFO L281 CegarLoopForPetriNet]: 120 programPoint places, -16 predicate places. [2023-11-29 02:48:21,484 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 93 transitions, 202 flow [2023-11-29 02:48:21,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 3 states have internal predecessors, (178), 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) [2023-11-29 02:48:21,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:48:21,485 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-29 02:48:21,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-29 02:48:21,485 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-11-29 02:48:21,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:48:21,485 INFO L85 PathProgramCache]: Analyzing trace with hash 560409312, now seen corresponding path program 1 times [2023-11-29 02:48:21,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:48:21,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970258888] [2023-11-29 02:48:21,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:48:21,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:48:21,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:48:21,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:48:21,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:48:21,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970258888] [2023-11-29 02:48:21,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970258888] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:48:21,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:48:21,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 02:48:21,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258069841] [2023-11-29 02:48:21,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:48:21,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:48:21,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:48:21,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:48:21,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:48:21,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 108 [2023-11-29 02:48:21,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 93 transitions, 202 flow. Second operand has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 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) [2023-11-29 02:48:21,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:48:21,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 108 [2023-11-29 02:48:21,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:48:37,149 INFO L124 PetriNetUnfolderBase]: 178908/243015 cut-off events. [2023-11-29 02:48:37,149 INFO L125 PetriNetUnfolderBase]: For 3905/3912 co-relation queries the response was YES. [2023-11-29 02:48:37,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 468803 conditions, 243015 events. 178908/243015 cut-off events. For 3905/3912 co-relation queries the response was YES. Maximal size of possible extension queue 7007. Compared 1772731 event pairs, 178908 based on Foata normal form. 2380/237707 useless extension candidates. Maximal degree in co-relation 468795. Up to 221876 conditions per place. [2023-11-29 02:48:38,379 INFO L140 encePairwiseOnDemand]: 105/108 looper letters, 43 selfloop transitions, 1 changer transitions 0/91 dead transitions. [2023-11-29 02:48:38,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 91 transitions, 286 flow [2023-11-29 02:48:38,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:48:38,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 02:48:38,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 226 transitions. [2023-11-29 02:48:38,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6975308641975309 [2023-11-29 02:48:38,381 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 226 transitions. [2023-11-29 02:48:38,381 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 226 transitions. [2023-11-29 02:48:38,381 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:48:38,381 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 226 transitions. [2023-11-29 02:48:38,382 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 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) [2023-11-29 02:48:38,384 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 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) [2023-11-29 02:48:38,384 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 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) [2023-11-29 02:48:38,384 INFO L175 Difference]: Start difference. First operand has 104 places, 93 transitions, 202 flow. Second operand 3 states and 226 transitions. [2023-11-29 02:48:38,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 91 transitions, 286 flow [2023-11-29 02:48:38,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 91 transitions, 285 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 02:48:38,387 INFO L231 Difference]: Finished difference. Result has 103 places, 91 transitions, 199 flow [2023-11-29 02:48:38,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=197, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=199, PETRI_PLACES=103, PETRI_TRANSITIONS=91} [2023-11-29 02:48:38,389 INFO L281 CegarLoopForPetriNet]: 120 programPoint places, -17 predicate places. [2023-11-29 02:48:38,389 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 91 transitions, 199 flow [2023-11-29 02:48:38,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 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) [2023-11-29 02:48:38,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:48:38,390 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:48:38,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-29 02:48:38,390 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-11-29 02:48:38,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:48:38,390 INFO L85 PathProgramCache]: Analyzing trace with hash 616533817, now seen corresponding path program 1 times [2023-11-29 02:48:38,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:48:38,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149967439] [2023-11-29 02:48:38,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:48:38,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:48:38,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:48:38,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:48:38,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:48:38,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149967439] [2023-11-29 02:48:38,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149967439] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:48:38,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:48:38,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 02:48:38,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204660967] [2023-11-29 02:48:38,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:48:38,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:48:38,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:48:38,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:48:38,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:48:38,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 108 [2023-11-29 02:48:38,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 91 transitions, 199 flow. Second operand has 3 states, 3 states have (on average 60.0) internal successors, (180), 3 states have internal predecessors, (180), 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) [2023-11-29 02:48:38,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:48:38,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 108 [2023-11-29 02:48:38,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:48:53,620 INFO L124 PetriNetUnfolderBase]: 180948/245777 cut-off events. [2023-11-29 02:48:53,620 INFO L125 PetriNetUnfolderBase]: For 3866/3866 co-relation queries the response was YES. [2023-11-29 02:48:54,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 474256 conditions, 245777 events. 180948/245777 cut-off events. For 3866/3866 co-relation queries the response was YES. Maximal size of possible extension queue 7007. Compared 1788132 event pairs, 180948 based on Foata normal form. 0/238174 useless extension candidates. Maximal degree in co-relation 474247. Up to 224566 conditions per place. [2023-11-29 02:48:55,151 INFO L140 encePairwiseOnDemand]: 105/108 looper letters, 45 selfloop transitions, 1 changer transitions 0/89 dead transitions. [2023-11-29 02:48:55,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 89 transitions, 287 flow [2023-11-29 02:48:55,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:48:55,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 02:48:55,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 222 transitions. [2023-11-29 02:48:55,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6851851851851852 [2023-11-29 02:48:55,153 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 222 transitions. [2023-11-29 02:48:55,153 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 222 transitions. [2023-11-29 02:48:55,153 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:48:55,153 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 222 transitions. [2023-11-29 02:48:55,154 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 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) [2023-11-29 02:48:55,155 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 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) [2023-11-29 02:48:55,155 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 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) [2023-11-29 02:48:55,155 INFO L175 Difference]: Start difference. First operand has 103 places, 91 transitions, 199 flow. Second operand 3 states and 222 transitions. [2023-11-29 02:48:55,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 89 transitions, 287 flow [2023-11-29 02:48:55,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 89 transitions, 286 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 02:48:55,158 INFO L231 Difference]: Finished difference. Result has 102 places, 89 transitions, 196 flow [2023-11-29 02:48:55,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=196, PETRI_PLACES=102, PETRI_TRANSITIONS=89} [2023-11-29 02:48:55,159 INFO L281 CegarLoopForPetriNet]: 120 programPoint places, -18 predicate places. [2023-11-29 02:48:55,159 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 89 transitions, 196 flow [2023-11-29 02:48:55,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.0) internal successors, (180), 3 states have internal predecessors, (180), 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) [2023-11-29 02:48:55,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:48:55,160 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:48:55,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-29 02:48:55,160 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-11-29 02:48:55,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:48:55,161 INFO L85 PathProgramCache]: Analyzing trace with hash 616533818, now seen corresponding path program 1 times [2023-11-29 02:48:55,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:48:55,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055363106] [2023-11-29 02:48:55,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:48:55,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:48:55,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:48:55,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:48:55,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:48:55,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055363106] [2023-11-29 02:48:55,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055363106] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:48:55,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:48:55,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 02:48:55,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048615930] [2023-11-29 02:48:55,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:48:55,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:48:55,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:48:55,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:48:55,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:48:55,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 108 [2023-11-29 02:48:55,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 89 transitions, 196 flow. Second operand has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 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) [2023-11-29 02:48:55,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:48:55,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 108 [2023-11-29 02:48:55,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:49:10,501 INFO L124 PetriNetUnfolderBase]: 178908/242599 cut-off events. [2023-11-29 02:49:10,501 INFO L125 PetriNetUnfolderBase]: For 3905/3912 co-relation queries the response was YES. [2023-11-29 02:49:10,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 468389 conditions, 242599 events. 178908/242599 cut-off events. For 3905/3912 co-relation queries the response was YES. Maximal size of possible extension queue 7007. Compared 1764109 event pairs, 178908 based on Foata normal form. 500/235827 useless extension candidates. Maximal degree in co-relation 468379. Up to 221876 conditions per place. [2023-11-29 02:49:11,752 INFO L140 encePairwiseOnDemand]: 105/108 looper letters, 43 selfloop transitions, 1 changer transitions 0/87 dead transitions. [2023-11-29 02:49:11,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 87 transitions, 280 flow [2023-11-29 02:49:11,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:49:11,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 02:49:11,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 226 transitions. [2023-11-29 02:49:11,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6975308641975309 [2023-11-29 02:49:11,754 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 226 transitions. [2023-11-29 02:49:11,754 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 226 transitions. [2023-11-29 02:49:11,754 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:49:11,754 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 226 transitions. [2023-11-29 02:49:11,755 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 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) [2023-11-29 02:49:11,756 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 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) [2023-11-29 02:49:11,756 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 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) [2023-11-29 02:49:11,756 INFO L175 Difference]: Start difference. First operand has 102 places, 89 transitions, 196 flow. Second operand 3 states and 226 transitions. [2023-11-29 02:49:11,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 87 transitions, 280 flow [2023-11-29 02:49:11,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 87 transitions, 279 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 02:49:11,758 INFO L231 Difference]: Finished difference. Result has 101 places, 87 transitions, 193 flow [2023-11-29 02:49:11,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=191, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=193, PETRI_PLACES=101, PETRI_TRANSITIONS=87} [2023-11-29 02:49:11,759 INFO L281 CegarLoopForPetriNet]: 120 programPoint places, -19 predicate places. [2023-11-29 02:49:11,759 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 87 transitions, 193 flow [2023-11-29 02:49:11,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 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) [2023-11-29 02:49:11,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:49:11,759 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:49:11,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-29 02:49:11,759 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-11-29 02:49:11,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:49:11,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1879422176, now seen corresponding path program 1 times [2023-11-29 02:49:11,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:49:11,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659378521] [2023-11-29 02:49:11,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:49:11,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:49:11,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:49:12,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:49:12,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:49:12,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659378521] [2023-11-29 02:49:12,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659378521] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:49:12,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:49:12,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 02:49:12,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052106118] [2023-11-29 02:49:12,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:49:12,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:49:12,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:49:12,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:49:12,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:49:12,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 108 [2023-11-29 02:49:12,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 87 transitions, 193 flow. Second operand has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 3 states have internal predecessors, (182), 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) [2023-11-29 02:49:12,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:49:12,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 108 [2023-11-29 02:49:12,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:49:27,747 INFO L124 PetriNetUnfolderBase]: 179508/243393 cut-off events. [2023-11-29 02:49:27,747 INFO L125 PetriNetUnfolderBase]: For 3898/3898 co-relation queries the response was YES. [2023-11-29 02:49:28,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 470034 conditions, 243393 events. 179508/243393 cut-off events. For 3898/3898 co-relation queries the response was YES. Maximal size of possible extension queue 7007. Compared 1768226 event pairs, 179508 based on Foata normal form. 0/236216 useless extension candidates. Maximal degree in co-relation 470023. Up to 222726 conditions per place. [2023-11-29 02:49:29,147 INFO L140 encePairwiseOnDemand]: 105/108 looper letters, 45 selfloop transitions, 1 changer transitions 0/85 dead transitions. [2023-11-29 02:49:29,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 85 transitions, 281 flow [2023-11-29 02:49:29,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:49:29,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 02:49:29,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 222 transitions. [2023-11-29 02:49:29,149 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6851851851851852 [2023-11-29 02:49:29,149 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 222 transitions. [2023-11-29 02:49:29,149 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 222 transitions. [2023-11-29 02:49:29,150 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:49:29,150 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 222 transitions. [2023-11-29 02:49:29,151 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 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) [2023-11-29 02:49:29,152 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 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) [2023-11-29 02:49:29,153 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 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) [2023-11-29 02:49:29,153 INFO L175 Difference]: Start difference. First operand has 101 places, 87 transitions, 193 flow. Second operand 3 states and 222 transitions. [2023-11-29 02:49:29,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 85 transitions, 281 flow [2023-11-29 02:49:29,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 85 transitions, 280 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 02:49:29,155 INFO L231 Difference]: Finished difference. Result has 100 places, 85 transitions, 190 flow [2023-11-29 02:49:29,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=190, PETRI_PLACES=100, PETRI_TRANSITIONS=85} [2023-11-29 02:49:29,156 INFO L281 CegarLoopForPetriNet]: 120 programPoint places, -20 predicate places. [2023-11-29 02:49:29,156 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 85 transitions, 190 flow [2023-11-29 02:49:29,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 3 states have internal predecessors, (182), 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) [2023-11-29 02:49:29,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:49:29,157 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:49:29,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-29 02:49:29,157 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-11-29 02:49:29,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:49:29,157 INFO L85 PathProgramCache]: Analyzing trace with hash 1879422177, now seen corresponding path program 1 times [2023-11-29 02:49:29,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:49:29,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634265634] [2023-11-29 02:49:29,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:49:29,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:49:29,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:49:29,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:49:29,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:49:29,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634265634] [2023-11-29 02:49:29,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634265634] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:49:29,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:49:29,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 02:49:29,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878368299] [2023-11-29 02:49:29,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:49:29,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:49:29,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:49:29,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:49:29,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:49:29,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 108 [2023-11-29 02:49:29,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 85 transitions, 190 flow. Second operand has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 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) [2023-11-29 02:49:29,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:49:29,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 108 [2023-11-29 02:49:29,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:49:46,262 INFO L124 PetriNetUnfolderBase]: 178908/242439 cut-off events. [2023-11-29 02:49:46,262 INFO L125 PetriNetUnfolderBase]: For 3905/3912 co-relation queries the response was YES. [2023-11-29 02:49:46,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 468231 conditions, 242439 events. 178908/242439 cut-off events. For 3905/3912 co-relation queries the response was YES. Maximal size of possible extension queue 7007. Compared 1761663 event pairs, 178908 based on Foata normal form. 220/235547 useless extension candidates. Maximal degree in co-relation 468219. Up to 221876 conditions per place. [2023-11-29 02:49:47,741 INFO L140 encePairwiseOnDemand]: 105/108 looper letters, 43 selfloop transitions, 1 changer transitions 0/83 dead transitions. [2023-11-29 02:49:47,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 83 transitions, 274 flow [2023-11-29 02:49:47,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:49:47,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 02:49:47,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 226 transitions. [2023-11-29 02:49:47,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6975308641975309 [2023-11-29 02:49:47,742 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 226 transitions. [2023-11-29 02:49:47,742 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 226 transitions. [2023-11-29 02:49:47,743 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:49:47,743 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 226 transitions. [2023-11-29 02:49:47,743 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 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) [2023-11-29 02:49:47,744 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 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) [2023-11-29 02:49:47,744 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 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) [2023-11-29 02:49:47,744 INFO L175 Difference]: Start difference. First operand has 100 places, 85 transitions, 190 flow. Second operand 3 states and 226 transitions. [2023-11-29 02:49:47,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 83 transitions, 274 flow [2023-11-29 02:49:47,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 83 transitions, 273 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 02:49:47,746 INFO L231 Difference]: Finished difference. Result has 99 places, 83 transitions, 187 flow [2023-11-29 02:49:47,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=185, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=187, PETRI_PLACES=99, PETRI_TRANSITIONS=83} [2023-11-29 02:49:47,746 INFO L281 CegarLoopForPetriNet]: 120 programPoint places, -21 predicate places. [2023-11-29 02:49:47,746 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 83 transitions, 187 flow [2023-11-29 02:49:47,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 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) [2023-11-29 02:49:47,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:49:47,747 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:49:47,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-29 02:49:47,747 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-11-29 02:49:47,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:49:47,747 INFO L85 PathProgramCache]: Analyzing trace with hash 673006225, now seen corresponding path program 1 times [2023-11-29 02:49:47,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:49:47,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176463286] [2023-11-29 02:49:47,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:49:47,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:49:47,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:49:47,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:49:47,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:49:47,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176463286] [2023-11-29 02:49:47,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176463286] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:49:47,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:49:47,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 02:49:47,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427264308] [2023-11-29 02:49:47,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:49:47,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:49:47,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:49:47,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:49:47,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:49:47,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 108 [2023-11-29 02:49:47,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 83 transitions, 187 flow. Second operand has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 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) [2023-11-29 02:49:47,859 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:49:47,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 108 [2023-11-29 02:49:47,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:50:03,263 INFO L124 PetriNetUnfolderBase]: 180948/244817 cut-off events. [2023-11-29 02:50:03,263 INFO L125 PetriNetUnfolderBase]: For 3902/3902 co-relation queries the response was YES. [2023-11-29 02:50:03,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 473300 conditions, 244817 events. 180948/244817 cut-off events. For 3902/3902 co-relation queries the response was YES. Maximal size of possible extension queue 7011. Compared 1774215 event pairs, 180948 based on Foata normal form. 0/238090 useless extension candidates. Maximal degree in co-relation 473287. Up to 224566 conditions per place. [2023-11-29 02:50:04,737 INFO L140 encePairwiseOnDemand]: 105/108 looper letters, 45 selfloop transitions, 1 changer transitions 0/81 dead transitions. [2023-11-29 02:50:04,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 81 transitions, 275 flow [2023-11-29 02:50:04,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:50:04,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 02:50:04,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 222 transitions. [2023-11-29 02:50:04,739 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6851851851851852 [2023-11-29 02:50:04,739 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 222 transitions. [2023-11-29 02:50:04,739 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 222 transitions. [2023-11-29 02:50:04,739 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:50:04,739 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 222 transitions. [2023-11-29 02:50:04,740 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 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) [2023-11-29 02:50:04,740 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 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) [2023-11-29 02:50:04,741 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 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) [2023-11-29 02:50:04,741 INFO L175 Difference]: Start difference. First operand has 99 places, 83 transitions, 187 flow. Second operand 3 states and 222 transitions. [2023-11-29 02:50:04,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 81 transitions, 275 flow [2023-11-29 02:50:04,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 81 transitions, 274 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 02:50:04,743 INFO L231 Difference]: Finished difference. Result has 98 places, 81 transitions, 184 flow [2023-11-29 02:50:04,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=184, PETRI_PLACES=98, PETRI_TRANSITIONS=81} [2023-11-29 02:50:04,744 INFO L281 CegarLoopForPetriNet]: 120 programPoint places, -22 predicate places. [2023-11-29 02:50:04,744 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 81 transitions, 184 flow [2023-11-29 02:50:04,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 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) [2023-11-29 02:50:04,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:50:04,744 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:50:04,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-29 02:50:04,744 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-11-29 02:50:04,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:50:04,745 INFO L85 PathProgramCache]: Analyzing trace with hash 673006226, now seen corresponding path program 1 times [2023-11-29 02:50:04,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:50:04,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252186743] [2023-11-29 02:50:04,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:50:04,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:50:04,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:50:04,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:50:04,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:50:04,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252186743] [2023-11-29 02:50:04,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252186743] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:50:04,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:50:04,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 02:50:04,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703260039] [2023-11-29 02:50:04,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:50:04,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:50:04,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:50:04,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:50:04,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:50:04,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 108 [2023-11-29 02:50:04,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 81 transitions, 184 flow. Second operand has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 3 states have internal predecessors, (190), 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) [2023-11-29 02:50:04,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:50:04,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 108 [2023-11-29 02:50:04,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:50:20,429 INFO L124 PetriNetUnfolderBase]: 178908/242023 cut-off events. [2023-11-29 02:50:20,429 INFO L125 PetriNetUnfolderBase]: For 3905/3912 co-relation queries the response was YES. [2023-11-29 02:50:20,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 467817 conditions, 242023 events. 178908/242023 cut-off events. For 3905/3912 co-relation queries the response was YES. Maximal size of possible extension queue 7007. Compared 1753387 event pairs, 178908 based on Foata normal form. 644/235971 useless extension candidates. Maximal degree in co-relation 467803. Up to 221876 conditions per place. [2023-11-29 02:50:21,759 INFO L140 encePairwiseOnDemand]: 105/108 looper letters, 43 selfloop transitions, 1 changer transitions 0/79 dead transitions. [2023-11-29 02:50:21,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 79 transitions, 268 flow [2023-11-29 02:50:21,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:50:21,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 02:50:21,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 226 transitions. [2023-11-29 02:50:21,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6975308641975309 [2023-11-29 02:50:21,761 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 226 transitions. [2023-11-29 02:50:21,761 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 226 transitions. [2023-11-29 02:50:21,761 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:50:21,762 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 226 transitions. [2023-11-29 02:50:21,762 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 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) [2023-11-29 02:50:21,763 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 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) [2023-11-29 02:50:21,763 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 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) [2023-11-29 02:50:21,763 INFO L175 Difference]: Start difference. First operand has 98 places, 81 transitions, 184 flow. Second operand 3 states and 226 transitions. [2023-11-29 02:50:21,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 79 transitions, 268 flow [2023-11-29 02:50:21,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 79 transitions, 267 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 02:50:21,765 INFO L231 Difference]: Finished difference. Result has 97 places, 79 transitions, 181 flow [2023-11-29 02:50:21,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=179, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=181, PETRI_PLACES=97, PETRI_TRANSITIONS=79} [2023-11-29 02:50:21,766 INFO L281 CegarLoopForPetriNet]: 120 programPoint places, -23 predicate places. [2023-11-29 02:50:21,766 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 79 transitions, 181 flow [2023-11-29 02:50:21,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 3 states have internal predecessors, (190), 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) [2023-11-29 02:50:21,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:50:21,766 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:50:21,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-29 02:50:21,766 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-11-29 02:50:21,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:50:21,767 INFO L85 PathProgramCache]: Analyzing trace with hash 621750568, now seen corresponding path program 1 times [2023-11-29 02:50:21,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:50:21,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946311412] [2023-11-29 02:50:21,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:50:21,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:50:21,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:50:21,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:50:21,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:50:21,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946311412] [2023-11-29 02:50:21,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946311412] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:50:21,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:50:21,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 02:50:21,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069080688] [2023-11-29 02:50:21,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:50:21,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:50:21,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:50:21,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:50:21,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:50:21,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 108 [2023-11-29 02:50:21,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 79 transitions, 181 flow. Second operand has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 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) [2023-11-29 02:50:21,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:50:21,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 108 [2023-11-29 02:50:21,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:50:39,367 INFO L124 PetriNetUnfolderBase]: 191412/256147 cut-off events. [2023-11-29 02:50:39,368 INFO L125 PetriNetUnfolderBase]: For 3904/3911 co-relation queries the response was YES. [2023-11-29 02:50:40,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 497576 conditions, 256147 events. 191412/256147 cut-off events. For 3904/3911 co-relation queries the response was YES. Maximal size of possible extension queue 7313. Compared 1820639 event pairs, 191412 based on Foata normal form. 0/251336 useless extension candidates. Maximal degree in co-relation 497561. Up to 237510 conditions per place. [2023-11-29 02:50:41,104 INFO L140 encePairwiseOnDemand]: 105/108 looper letters, 45 selfloop transitions, 1 changer transitions 0/77 dead transitions. [2023-11-29 02:50:41,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 77 transitions, 269 flow [2023-11-29 02:50:41,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:50:41,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 02:50:41,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 222 transitions. [2023-11-29 02:50:41,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6851851851851852 [2023-11-29 02:50:41,106 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 222 transitions. [2023-11-29 02:50:41,106 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 222 transitions. [2023-11-29 02:50:41,106 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:50:41,106 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 222 transitions. [2023-11-29 02:50:41,107 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 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) [2023-11-29 02:50:41,107 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 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) [2023-11-29 02:50:41,108 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 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) [2023-11-29 02:50:41,108 INFO L175 Difference]: Start difference. First operand has 97 places, 79 transitions, 181 flow. Second operand 3 states and 222 transitions. [2023-11-29 02:50:41,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 77 transitions, 269 flow [2023-11-29 02:50:41,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 77 transitions, 268 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 02:50:41,109 INFO L231 Difference]: Finished difference. Result has 96 places, 77 transitions, 178 flow [2023-11-29 02:50:41,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=178, PETRI_PLACES=96, PETRI_TRANSITIONS=77} [2023-11-29 02:50:41,110 INFO L281 CegarLoopForPetriNet]: 120 programPoint places, -24 predicate places. [2023-11-29 02:50:41,110 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 77 transitions, 178 flow [2023-11-29 02:50:41,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 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) [2023-11-29 02:50:41,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:50:41,111 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:50:41,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-29 02:50:41,111 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-11-29 02:50:41,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:50:41,111 INFO L85 PathProgramCache]: Analyzing trace with hash 621750569, now seen corresponding path program 1 times [2023-11-29 02:50:41,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:50:41,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064415793] [2023-11-29 02:50:41,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:50:41,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:50:41,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:50:41,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:50:41,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:50:41,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064415793] [2023-11-29 02:50:41,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064415793] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:50:41,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:50:41,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 02:50:41,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813862490] [2023-11-29 02:50:41,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:50:41,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:50:41,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:50:41,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:50:41,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:50:41,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 108 [2023-11-29 02:50:41,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 77 transitions, 178 flow. Second operand has 3 states, 3 states have (on average 64.0) internal successors, (192), 3 states have internal predecessors, (192), 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) [2023-11-29 02:50:41,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:50:41,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 108 [2023-11-29 02:50:41,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 02:50:57,042 INFO L124 PetriNetUnfolderBase]: 178908/240013 cut-off events. [2023-11-29 02:50:57,042 INFO L125 PetriNetUnfolderBase]: For 3905/3912 co-relation queries the response was YES. [2023-11-29 02:50:57,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 465809 conditions, 240013 events. 178908/240013 cut-off events. For 3905/3912 co-relation queries the response was YES. Maximal size of possible extension queue 6960. Compared 1706448 event pairs, 178908 based on Foata normal form. 3130/238457 useless extension candidates. Maximal degree in co-relation 465793. Up to 221876 conditions per place. [2023-11-29 02:50:58,667 INFO L140 encePairwiseOnDemand]: 105/108 looper letters, 43 selfloop transitions, 1 changer transitions 0/75 dead transitions. [2023-11-29 02:50:58,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 75 transitions, 262 flow [2023-11-29 02:50:58,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:50:58,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 02:50:58,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 226 transitions. [2023-11-29 02:50:58,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6975308641975309 [2023-11-29 02:50:58,669 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 226 transitions. [2023-11-29 02:50:58,669 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 226 transitions. [2023-11-29 02:50:58,669 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 02:50:58,669 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 226 transitions. [2023-11-29 02:50:58,670 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 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) [2023-11-29 02:50:58,670 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 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) [2023-11-29 02:50:58,671 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 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) [2023-11-29 02:50:58,671 INFO L175 Difference]: Start difference. First operand has 96 places, 77 transitions, 178 flow. Second operand 3 states and 226 transitions. [2023-11-29 02:50:58,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 75 transitions, 262 flow [2023-11-29 02:50:58,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 75 transitions, 261 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 02:50:58,672 INFO L231 Difference]: Finished difference. Result has 95 places, 75 transitions, 175 flow [2023-11-29 02:50:58,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=173, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=175, PETRI_PLACES=95, PETRI_TRANSITIONS=75} [2023-11-29 02:50:58,673 INFO L281 CegarLoopForPetriNet]: 120 programPoint places, -25 predicate places. [2023-11-29 02:50:58,673 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 75 transitions, 175 flow [2023-11-29 02:50:58,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.0) internal successors, (192), 3 states have internal predecessors, (192), 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) [2023-11-29 02:50:58,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 02:50:58,674 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:50:58,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-29 02:50:58,674 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-11-29 02:50:58,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:50:58,674 INFO L85 PathProgramCache]: Analyzing trace with hash -476816147, now seen corresponding path program 1 times [2023-11-29 02:50:58,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:50:58,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145576739] [2023-11-29 02:50:58,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:50:58,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:50:58,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:50:59,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:50:59,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:50:59,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145576739] [2023-11-29 02:50:59,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145576739] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:50:59,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:50:59,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 02:50:59,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392486949] [2023-11-29 02:50:59,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:50:59,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 02:50:59,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:50:59,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 02:50:59,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-29 02:50:59,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 108 [2023-11-29 02:50:59,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 75 transitions, 175 flow. Second operand has 6 states, 6 states have (on average 63.5) internal successors, (381), 6 states have internal predecessors, (381), 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) [2023-11-29 02:50:59,571 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 02:50:59,571 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 108 [2023-11-29 02:50:59,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand