./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/parallel-barrier.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f651f0f6-2591-4d2d-a3f7-359a4d057cf0/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f651f0f6-2591-4d2d-a3f7-359a4d057cf0/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_f651f0f6-2591-4d2d-a3f7-359a4d057cf0/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f651f0f6-2591-4d2d-a3f7-359a4d057cf0/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/parallel-barrier.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f651f0f6-2591-4d2d-a3f7-359a4d057cf0/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_f651f0f6-2591-4d2d-a3f7-359a4d057cf0/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 504de2e820c504d0b98f5b71c19407f1b43c0dd9338639fad4f2fe6ea2f6854f --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 05:28:16,493 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 05:28:16,566 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f651f0f6-2591-4d2d-a3f7-359a4d057cf0/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-29 05:28:16,570 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 05:28:16,571 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 05:28:16,595 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 05:28:16,595 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 05:28:16,596 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 05:28:16,597 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 05:28:16,597 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 05:28:16,598 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 05:28:16,598 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 05:28:16,599 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 05:28:16,600 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 05:28:16,600 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 05:28:16,601 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 05:28:16,601 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 05:28:16,602 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 05:28:16,602 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 05:28:16,603 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 05:28:16,603 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-29 05:28:16,604 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-29 05:28:16,604 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-29 05:28:16,605 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 05:28:16,605 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-29 05:28:16,606 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-29 05:28:16,606 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 05:28:16,606 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 05:28:16,607 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 05:28:16,607 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 05:28:16,608 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 05:28:16,608 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 05:28:16,609 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 05:28:16,609 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 05:28:16,610 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 05:28:16,610 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 05:28:16,610 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 05:28:16,611 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 05:28:16,611 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 05:28:16,611 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 05:28:16,612 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 05:28:16,612 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_f651f0f6-2591-4d2d-a3f7-359a4d057cf0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f651f0f6-2591-4d2d-a3f7-359a4d057cf0/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 504de2e820c504d0b98f5b71c19407f1b43c0dd9338639fad4f2fe6ea2f6854f [2023-11-29 05:28:16,840 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 05:28:16,864 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 05:28:16,866 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 05:28:16,867 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 05:28:16,868 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 05:28:16,869 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f651f0f6-2591-4d2d-a3f7-359a4d057cf0/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/weaver/parallel-barrier.wvr.c [2023-11-29 05:28:20,120 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 05:28:20,353 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 05:28:20,354 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f651f0f6-2591-4d2d-a3f7-359a4d057cf0/sv-benchmarks/c/weaver/parallel-barrier.wvr.c [2023-11-29 05:28:20,362 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f651f0f6-2591-4d2d-a3f7-359a4d057cf0/bin/uautomizer-verify-BQ2R08f2Ya/data/180fcc503/a4884395e9ef4420a220af78450750a2/FLAGf55e6af71 [2023-11-29 05:28:20,376 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f651f0f6-2591-4d2d-a3f7-359a4d057cf0/bin/uautomizer-verify-BQ2R08f2Ya/data/180fcc503/a4884395e9ef4420a220af78450750a2 [2023-11-29 05:28:20,378 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 05:28:20,380 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 05:28:20,381 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 05:28:20,381 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 05:28:20,385 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 05:28:20,386 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 05:28:20" (1/1) ... [2023-11-29 05:28:20,387 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2cbb72ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:28:20, skipping insertion in model container [2023-11-29 05:28:20,387 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 05:28:20" (1/1) ... [2023-11-29 05:28:20,417 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 05:28:20,603 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 05:28:20,614 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 05:28:20,644 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 05:28:20,652 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 05:28:20,652 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 05:28:20,658 INFO L206 MainTranslator]: Completed translation [2023-11-29 05:28:20,658 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:28:20 WrapperNode [2023-11-29 05:28:20,658 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 05:28:20,659 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 05:28:20,659 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 05:28:20,660 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 05:28:20,665 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:28:20" (1/1) ... [2023-11-29 05:28:20,674 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:28:20" (1/1) ... [2023-11-29 05:28:20,707 INFO L138 Inliner]: procedures = 25, calls = 99, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 272 [2023-11-29 05:28:20,707 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 05:28:20,708 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 05:28:20,708 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 05:28:20,708 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 05:28:20,721 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:28:20" (1/1) ... [2023-11-29 05:28:20,721 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:28:20" (1/1) ... [2023-11-29 05:28:20,726 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:28:20" (1/1) ... [2023-11-29 05:28:20,750 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 05:28:20,750 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:28:20" (1/1) ... [2023-11-29 05:28:20,751 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:28:20" (1/1) ... [2023-11-29 05:28:20,765 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:28:20" (1/1) ... [2023-11-29 05:28:20,768 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:28:20" (1/1) ... [2023-11-29 05:28:20,772 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:28:20" (1/1) ... [2023-11-29 05:28:20,775 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:28:20" (1/1) ... [2023-11-29 05:28:20,781 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 05:28:20,783 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 05:28:20,783 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 05:28:20,783 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 05:28:20,784 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:28:20" (1/1) ... [2023-11-29 05:28:20,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 05:28:20,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f651f0f6-2591-4d2d-a3f7-359a4d057cf0/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:28:20,817 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f651f0f6-2591-4d2d-a3f7-359a4d057cf0/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 05:28:20,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f651f0f6-2591-4d2d-a3f7-359a4d057cf0/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 05:28:20,859 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 05:28:20,860 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 05:28:20,860 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 05:28:20,860 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 05:28:20,860 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 05:28:20,860 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-29 05:28:20,860 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-29 05:28:20,860 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2023-11-29 05:28:20,860 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2023-11-29 05:28:20,861 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 05:28:20,861 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 05:28:20,861 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-29 05:28:20,861 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-29 05:28:20,861 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-29 05:28:20,862 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2023-11-29 05:28:20,862 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2023-11-29 05:28:20,862 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-29 05:28:20,862 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-29 05:28:20,862 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-29 05:28:20,863 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-29 05:28:20,863 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-29 05:28:20,863 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-29 05:28:20,863 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-11-29 05:28:20,864 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-11-29 05:28:20,864 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 05:28:20,864 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 05:28:20,864 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 05:28:20,864 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-29 05:28:20,865 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-29 05:28:20,865 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2023-11-29 05:28:20,865 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2023-11-29 05:28:20,865 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2023-11-29 05:28:20,865 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2023-11-29 05:28:20,865 INFO L130 BoogieDeclarations]: Found specification of procedure thread6 [2023-11-29 05:28:20,866 INFO L138 BoogieDeclarations]: Found implementation of procedure thread6 [2023-11-29 05:28:20,866 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-29 05:28:20,866 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-29 05:28:20,866 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 05:28:20,866 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 05:28:20,866 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 05:28:20,868 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 05:28:21,012 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 05:28:21,015 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 05:28:21,384 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 05:28:21,629 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 05:28:21,629 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-29 05:28:21,630 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 05:28:21 BoogieIcfgContainer [2023-11-29 05:28:21,630 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 05:28:21,632 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 05:28:21,632 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 05:28:21,635 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 05:28:21,635 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 05:28:20" (1/3) ... [2023-11-29 05:28:21,636 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2592a6a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 05:28:21, skipping insertion in model container [2023-11-29 05:28:21,636 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:28:20" (2/3) ... [2023-11-29 05:28:21,637 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2592a6a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 05:28:21, skipping insertion in model container [2023-11-29 05:28:21,637 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 05:28:21" (3/3) ... [2023-11-29 05:28:21,638 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-barrier.wvr.c [2023-11-29 05:28:21,655 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 05:28:21,655 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 26 error locations. [2023-11-29 05:28:21,655 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-29 05:28:21,767 INFO L144 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2023-11-29 05:28:21,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 138 places, 123 transitions, 312 flow [2023-11-29 05:28:21,861 INFO L124 PetriNetUnfolderBase]: 4/103 cut-off events. [2023-11-29 05:28:21,862 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-29 05:28:21,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132 conditions, 103 events. 4/103 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 306 event pairs, 0 based on Foata normal form. 0/73 useless extension candidates. Maximal degree in co-relation 105. Up to 3 conditions per place. [2023-11-29 05:28:21,867 INFO L82 GeneralOperation]: Start removeDead. Operand has 138 places, 123 transitions, 312 flow [2023-11-29 05:28:21,874 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 117 places, 102 transitions, 252 flow [2023-11-29 05:28:21,887 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 05:28:21,894 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;@329c9d44, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 05:28:21,895 INFO L358 AbstractCegarLoop]: Starting to check reachability of 52 error locations. [2023-11-29 05:28:21,899 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 05:28:21,899 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-11-29 05:28:21,899 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 05:28:21,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:28:21,900 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-29 05:28:21,901 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-29 05:28:21,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:28:21,906 INFO L85 PathProgramCache]: Analyzing trace with hash 17364, now seen corresponding path program 1 times [2023-11-29 05:28:21,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:28:21,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114041058] [2023-11-29 05:28:21,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:28:21,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:28:22,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:28:22,242 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 05:28:22,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:28:22,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114041058] [2023-11-29 05:28:22,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114041058] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:28:22,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:28:22,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 05:28:22,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985122378] [2023-11-29 05:28:22,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:28:22,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:28:22,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:28:22,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:28:22,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:28:22,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 127 [2023-11-29 05:28:22,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 102 transitions, 252 flow. Second operand has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 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 05:28:22,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:28:22,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 127 [2023-11-29 05:28:22,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:28:25,729 INFO L124 PetriNetUnfolderBase]: 9843/20171 cut-off events. [2023-11-29 05:28:25,730 INFO L125 PetriNetUnfolderBase]: For 3205/3206 co-relation queries the response was YES. [2023-11-29 05:28:25,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36389 conditions, 20171 events. 9843/20171 cut-off events. For 3205/3206 co-relation queries the response was YES. Maximal size of possible extension queue 764. Compared 194844 event pairs, 8538 based on Foata normal form. 2/14908 useless extension candidates. Maximal degree in co-relation 35674. Up to 12132 conditions per place. [2023-11-29 05:28:26,104 INFO L140 encePairwiseOnDemand]: 120/127 looper letters, 70 selfloop transitions, 4 changer transitions 0/134 dead transitions. [2023-11-29 05:28:26,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 134 transitions, 509 flow [2023-11-29 05:28:26,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:28:26,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 05:28:26,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 303 transitions. [2023-11-29 05:28:26,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7952755905511811 [2023-11-29 05:28:26,125 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 303 transitions. [2023-11-29 05:28:26,126 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 303 transitions. [2023-11-29 05:28:26,128 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:28:26,131 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 303 transitions. [2023-11-29 05:28:26,136 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 101.0) internal successors, (303), 3 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:28:26,142 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 127.0) internal successors, (508), 4 states have internal predecessors, (508), 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 05:28:26,143 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 127.0) internal successors, (508), 4 states have internal predecessors, (508), 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 05:28:26,145 INFO L175 Difference]: Start difference. First operand has 117 places, 102 transitions, 252 flow. Second operand 3 states and 303 transitions. [2023-11-29 05:28:26,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 134 transitions, 509 flow [2023-11-29 05:28:26,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 134 transitions, 447 flow, removed 0 selfloop flow, removed 12 redundant places. [2023-11-29 05:28:26,358 INFO L231 Difference]: Finished difference. Result has 106 places, 102 transitions, 244 flow [2023-11-29 05:28:26,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=127, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=244, PETRI_PLACES=106, PETRI_TRANSITIONS=102} [2023-11-29 05:28:26,366 INFO L281 CegarLoopForPetriNet]: 117 programPoint places, -11 predicate places. [2023-11-29 05:28:26,366 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 102 transitions, 244 flow [2023-11-29 05:28:26,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 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 05:28:26,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:28:26,367 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-29 05:28:26,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 05:28:26,368 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-29 05:28:26,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:28:26,369 INFO L85 PathProgramCache]: Analyzing trace with hash 17365, now seen corresponding path program 1 times [2023-11-29 05:28:26,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:28:26,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197947025] [2023-11-29 05:28:26,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:28:26,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:28:26,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:28:26,531 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 05:28:26,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:28:26,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197947025] [2023-11-29 05:28:26,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197947025] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:28:26,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:28:26,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 05:28:26,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413355253] [2023-11-29 05:28:26,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:28:26,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:28:26,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:28:26,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:28:26,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:28:26,615 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 127 [2023-11-29 05:28:26,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 102 transitions, 244 flow. Second operand has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 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 05:28:26,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:28:26,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 127 [2023-11-29 05:28:26,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:28:28,173 INFO L124 PetriNetUnfolderBase]: 6323/13575 cut-off events. [2023-11-29 05:28:28,173 INFO L125 PetriNetUnfolderBase]: For 870/871 co-relation queries the response was YES. [2023-11-29 05:28:28,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23215 conditions, 13575 events. 6323/13575 cut-off events. For 870/871 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 126911 event pairs, 5796 based on Foata normal form. 962/10850 useless extension candidates. Maximal degree in co-relation 20718. Up to 8435 conditions per place. [2023-11-29 05:28:28,297 INFO L140 encePairwiseOnDemand]: 124/127 looper letters, 37 selfloop transitions, 1 changer transitions 0/100 dead transitions. [2023-11-29 05:28:28,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 100 transitions, 316 flow [2023-11-29 05:28:28,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:28:28,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 05:28:28,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 269 transitions. [2023-11-29 05:28:28,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7060367454068242 [2023-11-29 05:28:28,302 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 269 transitions. [2023-11-29 05:28:28,302 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 269 transitions. [2023-11-29 05:28:28,303 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:28:28,303 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 269 transitions. [2023-11-29 05:28:28,305 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 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 05:28:28,308 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 127.0) internal successors, (508), 4 states have internal predecessors, (508), 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 05:28:28,309 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 127.0) internal successors, (508), 4 states have internal predecessors, (508), 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 05:28:28,309 INFO L175 Difference]: Start difference. First operand has 106 places, 102 transitions, 244 flow. Second operand 3 states and 269 transitions. [2023-11-29 05:28:28,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 100 transitions, 316 flow [2023-11-29 05:28:28,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 100 transitions, 308 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 05:28:28,326 INFO L231 Difference]: Finished difference. Result has 104 places, 100 transitions, 234 flow [2023-11-29 05:28:28,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=127, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=234, PETRI_PLACES=104, PETRI_TRANSITIONS=100} [2023-11-29 05:28:28,327 INFO L281 CegarLoopForPetriNet]: 117 programPoint places, -13 predicate places. [2023-11-29 05:28:28,327 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 100 transitions, 234 flow [2023-11-29 05:28:28,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 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 05:28:28,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:28:28,328 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-29 05:28:28,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 05:28:28,328 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-29 05:28:28,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:28:28,329 INFO L85 PathProgramCache]: Analyzing trace with hash 517919945, now seen corresponding path program 1 times [2023-11-29 05:28:28,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:28:28,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118076150] [2023-11-29 05:28:28,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:28:28,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:28:28,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:28:28,437 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 05:28:28,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:28:28,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118076150] [2023-11-29 05:28:28,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118076150] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:28:28,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:28:28,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 05:28:28,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394658252] [2023-11-29 05:28:28,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:28:28,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:28:28,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:28:28,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:28:28,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:28:28,514 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 127 [2023-11-29 05:28:28,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 100 transitions, 234 flow. Second operand has 3 states, 3 states have (on average 76.33333333333333) internal successors, (229), 3 states have internal predecessors, (229), 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 05:28:28,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:28:28,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 127 [2023-11-29 05:28:28,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:28:30,324 INFO L124 PetriNetUnfolderBase]: 8764/15912 cut-off events. [2023-11-29 05:28:30,325 INFO L125 PetriNetUnfolderBase]: For 596/597 co-relation queries the response was YES. [2023-11-29 05:28:30,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28571 conditions, 15912 events. 8764/15912 cut-off events. For 596/597 co-relation queries the response was YES. Maximal size of possible extension queue 555. Compared 134448 event pairs, 2624 based on Foata normal form. 0/12812 useless extension candidates. Maximal degree in co-relation 28563. Up to 10612 conditions per place. [2023-11-29 05:28:30,426 INFO L140 encePairwiseOnDemand]: 120/127 looper letters, 69 selfloop transitions, 6 changer transitions 0/133 dead transitions. [2023-11-29 05:28:30,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 133 transitions, 469 flow [2023-11-29 05:28:30,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:28:30,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 05:28:30,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 299 transitions. [2023-11-29 05:28:30,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7847769028871391 [2023-11-29 05:28:30,429 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 299 transitions. [2023-11-29 05:28:30,429 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 299 transitions. [2023-11-29 05:28:30,430 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:28:30,430 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 299 transitions. [2023-11-29 05:28:30,431 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 99.66666666666667) internal successors, (299), 3 states have internal predecessors, (299), 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 05:28:30,433 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 127.0) internal successors, (508), 4 states have internal predecessors, (508), 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 05:28:30,434 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 127.0) internal successors, (508), 4 states have internal predecessors, (508), 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 05:28:30,434 INFO L175 Difference]: Start difference. First operand has 104 places, 100 transitions, 234 flow. Second operand 3 states and 299 transitions. [2023-11-29 05:28:30,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 133 transitions, 469 flow [2023-11-29 05:28:30,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 133 transitions, 468 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 05:28:30,440 INFO L231 Difference]: Finished difference. Result has 107 places, 105 transitions, 287 flow [2023-11-29 05:28:30,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=127, PETRI_DIFFERENCE_MINUEND_FLOW=233, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=287, PETRI_PLACES=107, PETRI_TRANSITIONS=105} [2023-11-29 05:28:30,442 INFO L281 CegarLoopForPetriNet]: 117 programPoint places, -10 predicate places. [2023-11-29 05:28:30,442 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 105 transitions, 287 flow [2023-11-29 05:28:30,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.33333333333333) internal successors, (229), 3 states have internal predecessors, (229), 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 05:28:30,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:28:30,443 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-29 05:28:30,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-29 05:28:30,444 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-29 05:28:30,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:28:30,445 INFO L85 PathProgramCache]: Analyzing trace with hash 517919946, now seen corresponding path program 1 times [2023-11-29 05:28:30,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:28:30,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106430235] [2023-11-29 05:28:30,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:28:30,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:28:30,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:28:30,552 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 05:28:30,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:28:30,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106430235] [2023-11-29 05:28:30,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106430235] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:28:30,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:28:30,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 05:28:30,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573885762] [2023-11-29 05:28:30,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:28:30,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:28:30,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:28:30,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:28:30,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:28:30,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 127 [2023-11-29 05:28:30,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 105 transitions, 287 flow. Second operand has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 3 states have internal predecessors, (235), 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 05:28:30,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:28:30,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 127 [2023-11-29 05:28:30,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:28:31,857 INFO L124 PetriNetUnfolderBase]: 6508/13006 cut-off events. [2023-11-29 05:28:31,858 INFO L125 PetriNetUnfolderBase]: For 1623/1624 co-relation queries the response was YES. [2023-11-29 05:28:31,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23918 conditions, 13006 events. 6508/13006 cut-off events. For 1623/1624 co-relation queries the response was YES. Maximal size of possible extension queue 456. Compared 114334 event pairs, 1981 based on Foata normal form. 680/11100 useless extension candidates. Maximal degree in co-relation 23909. Up to 8076 conditions per place. [2023-11-29 05:28:31,951 INFO L140 encePairwiseOnDemand]: 123/127 looper letters, 52 selfloop transitions, 5 changer transitions 0/119 dead transitions. [2023-11-29 05:28:31,951 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 119 transitions, 436 flow [2023-11-29 05:28:31,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:28:31,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 05:28:31,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 286 transitions. [2023-11-29 05:28:31,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7506561679790026 [2023-11-29 05:28:31,954 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 286 transitions. [2023-11-29 05:28:31,954 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 286 transitions. [2023-11-29 05:28:31,954 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:28:31,954 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 286 transitions. [2023-11-29 05:28:31,956 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 95.33333333333333) internal successors, (286), 3 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:28:31,958 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 127.0) internal successors, (508), 4 states have internal predecessors, (508), 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 05:28:31,958 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 127.0) internal successors, (508), 4 states have internal predecessors, (508), 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 05:28:31,958 INFO L175 Difference]: Start difference. First operand has 107 places, 105 transitions, 287 flow. Second operand 3 states and 286 transitions. [2023-11-29 05:28:31,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 119 transitions, 436 flow [2023-11-29 05:28:31,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 119 transitions, 424 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 05:28:31,970 INFO L231 Difference]: Finished difference. Result has 105 places, 103 transitions, 281 flow [2023-11-29 05:28:31,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=127, PETRI_DIFFERENCE_MINUEND_FLOW=271, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=281, PETRI_PLACES=105, PETRI_TRANSITIONS=103} [2023-11-29 05:28:31,971 INFO L281 CegarLoopForPetriNet]: 117 programPoint places, -12 predicate places. [2023-11-29 05:28:31,972 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 103 transitions, 281 flow [2023-11-29 05:28:31,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 3 states have internal predecessors, (235), 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 05:28:31,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:28:31,973 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-29 05:28:31,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-29 05:28:31,973 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-29 05:28:31,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:28:31,974 INFO L85 PathProgramCache]: Analyzing trace with hash 517917739, now seen corresponding path program 1 times [2023-11-29 05:28:31,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:28:31,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034053278] [2023-11-29 05:28:31,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:28:31,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:28:31,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:28:32,019 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 05:28:32,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:28:32,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034053278] [2023-11-29 05:28:32,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034053278] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:28:32,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:28:32,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 05:28:32,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096731965] [2023-11-29 05:28:32,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:28:32,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:28:32,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:28:32,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:28:32,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:28:32,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 127 [2023-11-29 05:28:32,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 103 transitions, 281 flow. Second operand has 3 states, 3 states have (on average 76.33333333333333) internal successors, (229), 3 states have internal predecessors, (229), 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 05:28:32,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:28:32,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 127 [2023-11-29 05:28:32,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:28:33,733 INFO L124 PetriNetUnfolderBase]: 6957/14717 cut-off events. [2023-11-29 05:28:33,733 INFO L125 PetriNetUnfolderBase]: For 1407/1407 co-relation queries the response was YES. [2023-11-29 05:28:33,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25875 conditions, 14717 events. 6957/14717 cut-off events. For 1407/1407 co-relation queries the response was YES. Maximal size of possible extension queue 525. Compared 136925 event pairs, 5663 based on Foata normal form. 0/10933 useless extension candidates. Maximal degree in co-relation 25866. Up to 8190 conditions per place. [2023-11-29 05:28:33,831 INFO L140 encePairwiseOnDemand]: 120/127 looper letters, 75 selfloop transitions, 7 changer transitions 0/140 dead transitions. [2023-11-29 05:28:33,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 140 transitions, 550 flow [2023-11-29 05:28:33,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:28:33,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 05:28:33,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 303 transitions. [2023-11-29 05:28:33,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7952755905511811 [2023-11-29 05:28:33,833 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 303 transitions. [2023-11-29 05:28:33,833 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 303 transitions. [2023-11-29 05:28:33,833 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:28:33,833 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 303 transitions. [2023-11-29 05:28:33,834 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 101.0) internal successors, (303), 3 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:28:33,835 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 127.0) internal successors, (508), 4 states have internal predecessors, (508), 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 05:28:33,836 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 127.0) internal successors, (508), 4 states have internal predecessors, (508), 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 05:28:33,836 INFO L175 Difference]: Start difference. First operand has 105 places, 103 transitions, 281 flow. Second operand 3 states and 303 transitions. [2023-11-29 05:28:33,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 140 transitions, 550 flow [2023-11-29 05:28:33,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 140 transitions, 536 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 05:28:33,841 INFO L231 Difference]: Finished difference. Result has 107 places, 108 transitions, 333 flow [2023-11-29 05:28:33,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=127, PETRI_DIFFERENCE_MINUEND_FLOW=271, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=333, PETRI_PLACES=107, PETRI_TRANSITIONS=108} [2023-11-29 05:28:33,842 INFO L281 CegarLoopForPetriNet]: 117 programPoint places, -10 predicate places. [2023-11-29 05:28:33,842 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 108 transitions, 333 flow [2023-11-29 05:28:33,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.33333333333333) internal successors, (229), 3 states have internal predecessors, (229), 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 05:28:33,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:28:33,843 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-29 05:28:33,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-29 05:28:33,843 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-29 05:28:33,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:28:33,844 INFO L85 PathProgramCache]: Analyzing trace with hash 517917740, now seen corresponding path program 1 times [2023-11-29 05:28:33,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:28:33,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650691848] [2023-11-29 05:28:33,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:28:33,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:28:33,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:28:33,911 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 05:28:33,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:28:33,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650691848] [2023-11-29 05:28:33,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650691848] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:28:33,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:28:33,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 05:28:33,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234435304] [2023-11-29 05:28:33,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:28:33,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:28:33,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:28:33,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:28:33,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:28:33,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 127 [2023-11-29 05:28:33,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 108 transitions, 333 flow. Second operand has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 3 states have internal predecessors, (235), 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 05:28:33,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:28:33,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 127 [2023-11-29 05:28:33,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:28:35,354 INFO L124 PetriNetUnfolderBase]: 6657/14273 cut-off events. [2023-11-29 05:28:35,354 INFO L125 PetriNetUnfolderBase]: For 2092/2092 co-relation queries the response was YES. [2023-11-29 05:28:35,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25423 conditions, 14273 events. 6657/14273 cut-off events. For 2092/2092 co-relation queries the response was YES. Maximal size of possible extension queue 525. Compared 133488 event pairs, 6059 based on Foata normal form. 120/10696 useless extension candidates. Maximal degree in co-relation 25411. Up to 8945 conditions per place. [2023-11-29 05:28:35,453 INFO L140 encePairwiseOnDemand]: 124/127 looper letters, 43 selfloop transitions, 1 changer transitions 0/106 dead transitions. [2023-11-29 05:28:35,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 106 transitions, 417 flow [2023-11-29 05:28:35,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:28:35,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 05:28:35,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 269 transitions. [2023-11-29 05:28:35,455 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7060367454068242 [2023-11-29 05:28:35,455 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 269 transitions. [2023-11-29 05:28:35,455 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 269 transitions. [2023-11-29 05:28:35,455 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:28:35,455 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 269 transitions. [2023-11-29 05:28:35,456 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 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 05:28:35,457 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 127.0) internal successors, (508), 4 states have internal predecessors, (508), 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 05:28:35,458 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 127.0) internal successors, (508), 4 states have internal predecessors, (508), 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 05:28:35,458 INFO L175 Difference]: Start difference. First operand has 107 places, 108 transitions, 333 flow. Second operand 3 states and 269 transitions. [2023-11-29 05:28:35,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 106 transitions, 417 flow [2023-11-29 05:28:35,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 106 transitions, 403 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 05:28:35,464 INFO L231 Difference]: Finished difference. Result has 105 places, 106 transitions, 317 flow [2023-11-29 05:28:35,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=127, PETRI_DIFFERENCE_MINUEND_FLOW=315, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=317, PETRI_PLACES=105, PETRI_TRANSITIONS=106} [2023-11-29 05:28:35,465 INFO L281 CegarLoopForPetriNet]: 117 programPoint places, -12 predicate places. [2023-11-29 05:28:35,465 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 106 transitions, 317 flow [2023-11-29 05:28:35,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 3 states have internal predecessors, (235), 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 05:28:35,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:28:35,466 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:28:35,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-29 05:28:35,466 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-29 05:28:35,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:28:35,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1831191133, now seen corresponding path program 1 times [2023-11-29 05:28:35,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:28:35,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247266863] [2023-11-29 05:28:35,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:28:35,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:28:35,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:28:35,543 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 05:28:35,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:28:35,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247266863] [2023-11-29 05:28:35,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247266863] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:28:35,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:28:35,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 05:28:35,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617173625] [2023-11-29 05:28:35,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:28:35,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:28:35,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:28:35,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:28:35,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:28:35,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 127 [2023-11-29 05:28:35,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 106 transitions, 317 flow. Second operand has 3 states, 3 states have (on average 79.0) internal successors, (237), 3 states have internal predecessors, (237), 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 05:28:35,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:28:35,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 127 [2023-11-29 05:28:35,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:28:37,146 INFO L124 PetriNetUnfolderBase]: 6657/13045 cut-off events. [2023-11-29 05:28:37,146 INFO L125 PetriNetUnfolderBase]: For 1576/1576 co-relation queries the response was YES. [2023-11-29 05:28:37,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24239 conditions, 13045 events. 6657/13045 cut-off events. For 1576/1576 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 112765 event pairs, 2105 based on Foata normal form. 408/11117 useless extension candidates. Maximal degree in co-relation 24227. Up to 8076 conditions per place. [2023-11-29 05:28:37,240 INFO L140 encePairwiseOnDemand]: 123/127 looper letters, 54 selfloop transitions, 6 changer transitions 0/120 dead transitions. [2023-11-29 05:28:37,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 120 transitions, 472 flow [2023-11-29 05:28:37,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:28:37,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 05:28:37,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 286 transitions. [2023-11-29 05:28:37,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7506561679790026 [2023-11-29 05:28:37,242 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 286 transitions. [2023-11-29 05:28:37,242 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 286 transitions. [2023-11-29 05:28:37,242 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:28:37,242 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 286 transitions. [2023-11-29 05:28:37,243 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 95.33333333333333) internal successors, (286), 3 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:28:37,245 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 127.0) internal successors, (508), 4 states have internal predecessors, (508), 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 05:28:37,245 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 127.0) internal successors, (508), 4 states have internal predecessors, (508), 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 05:28:37,246 INFO L175 Difference]: Start difference. First operand has 105 places, 106 transitions, 317 flow. Second operand 3 states and 286 transitions. [2023-11-29 05:28:37,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 120 transitions, 472 flow [2023-11-29 05:28:37,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 120 transitions, 471 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 05:28:37,251 INFO L231 Difference]: Finished difference. Result has 104 places, 104 transitions, 324 flow [2023-11-29 05:28:37,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=127, PETRI_DIFFERENCE_MINUEND_FLOW=312, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=324, PETRI_PLACES=104, PETRI_TRANSITIONS=104} [2023-11-29 05:28:37,252 INFO L281 CegarLoopForPetriNet]: 117 programPoint places, -13 predicate places. [2023-11-29 05:28:37,252 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 104 transitions, 324 flow [2023-11-29 05:28:37,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 79.0) internal successors, (237), 3 states have internal predecessors, (237), 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 05:28:37,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:28:37,252 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:28:37,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-29 05:28:37,253 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-29 05:28:37,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:28:37,253 INFO L85 PathProgramCache]: Analyzing trace with hash 1831191132, now seen corresponding path program 1 times [2023-11-29 05:28:37,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:28:37,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656023975] [2023-11-29 05:28:37,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:28:37,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:28:37,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:28:37,313 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 05:28:37,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:28:37,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656023975] [2023-11-29 05:28:37,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656023975] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:28:37,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:28:37,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 05:28:37,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270396899] [2023-11-29 05:28:37,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:28:37,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:28:37,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:28:37,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:28:37,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:28:37,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 127 [2023-11-29 05:28:37,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 104 transitions, 324 flow. Second operand has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 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 05:28:37,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:28:37,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 127 [2023-11-29 05:28:37,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:28:38,947 INFO L124 PetriNetUnfolderBase]: 7973/16941 cut-off events. [2023-11-29 05:28:38,947 INFO L125 PetriNetUnfolderBase]: For 1793/1793 co-relation queries the response was YES. [2023-11-29 05:28:39,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29892 conditions, 16941 events. 7973/16941 cut-off events. For 1793/1793 co-relation queries the response was YES. Maximal size of possible extension queue 580. Compared 162344 event pairs, 6784 based on Foata normal form. 0/12668 useless extension candidates. Maximal degree in co-relation 29880. Up to 9417 conditions per place. [2023-11-29 05:28:39,075 INFO L140 encePairwiseOnDemand]: 120/127 looper letters, 71 selfloop transitions, 9 changer transitions 0/136 dead transitions. [2023-11-29 05:28:39,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 136 transitions, 573 flow [2023-11-29 05:28:39,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:28:39,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 05:28:39,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 299 transitions. [2023-11-29 05:28:39,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7847769028871391 [2023-11-29 05:28:39,077 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 299 transitions. [2023-11-29 05:28:39,077 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 299 transitions. [2023-11-29 05:28:39,077 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:28:39,077 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 299 transitions. [2023-11-29 05:28:39,078 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 99.66666666666667) internal successors, (299), 3 states have internal predecessors, (299), 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 05:28:39,079 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 127.0) internal successors, (508), 4 states have internal predecessors, (508), 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 05:28:39,079 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 127.0) internal successors, (508), 4 states have internal predecessors, (508), 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 05:28:39,079 INFO L175 Difference]: Start difference. First operand has 104 places, 104 transitions, 324 flow. Second operand 3 states and 299 transitions. [2023-11-29 05:28:39,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 136 transitions, 573 flow [2023-11-29 05:28:39,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 136 transitions, 557 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 05:28:39,087 INFO L231 Difference]: Finished difference. Result has 106 places, 108 transitions, 376 flow [2023-11-29 05:28:39,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=127, PETRI_DIFFERENCE_MINUEND_FLOW=312, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=376, PETRI_PLACES=106, PETRI_TRANSITIONS=108} [2023-11-29 05:28:39,089 INFO L281 CegarLoopForPetriNet]: 117 programPoint places, -11 predicate places. [2023-11-29 05:28:39,089 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 108 transitions, 376 flow [2023-11-29 05:28:39,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 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 05:28:39,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:28:39,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:28:39,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-29 05:28:39,089 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread4Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-29 05:28:39,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:28:39,090 INFO L85 PathProgramCache]: Analyzing trace with hash 1765471288, now seen corresponding path program 1 times [2023-11-29 05:28:39,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:28:39,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477908292] [2023-11-29 05:28:39,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:28:39,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:28:39,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:28:39,157 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 05:28:39,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:28:39,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477908292] [2023-11-29 05:28:39,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477908292] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:28:39,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:28:39,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 05:28:39,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447543119] [2023-11-29 05:28:39,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:28:39,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:28:39,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:28:39,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:28:39,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:28:39,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 127 [2023-11-29 05:28:39,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 108 transitions, 376 flow. Second operand has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 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 05:28:39,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:28:39,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 127 [2023-11-29 05:28:39,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:28:40,898 INFO L124 PetriNetUnfolderBase]: 9496/17515 cut-off events. [2023-11-29 05:28:40,899 INFO L125 PetriNetUnfolderBase]: For 4089/4089 co-relation queries the response was YES. [2023-11-29 05:28:40,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33360 conditions, 17515 events. 9496/17515 cut-off events. For 4089/4089 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 150536 event pairs, 2996 based on Foata normal form. 0/14247 useless extension candidates. Maximal degree in co-relation 33347. Up to 10941 conditions per place. [2023-11-29 05:28:41,006 INFO L140 encePairwiseOnDemand]: 120/127 looper letters, 75 selfloop transitions, 9 changer transitions 0/142 dead transitions. [2023-11-29 05:28:41,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 142 transitions, 661 flow [2023-11-29 05:28:41,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:28:41,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 05:28:41,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 298 transitions. [2023-11-29 05:28:41,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7821522309711286 [2023-11-29 05:28:41,008 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 298 transitions. [2023-11-29 05:28:41,008 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 298 transitions. [2023-11-29 05:28:41,008 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:28:41,008 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 298 transitions. [2023-11-29 05:28:41,009 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 99.33333333333333) internal successors, (298), 3 states have internal predecessors, (298), 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 05:28:41,010 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 127.0) internal successors, (508), 4 states have internal predecessors, (508), 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 05:28:41,010 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 127.0) internal successors, (508), 4 states have internal predecessors, (508), 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 05:28:41,011 INFO L175 Difference]: Start difference. First operand has 106 places, 108 transitions, 376 flow. Second operand 3 states and 298 transitions. [2023-11-29 05:28:41,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 142 transitions, 661 flow [2023-11-29 05:28:41,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 142 transitions, 639 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 05:28:41,019 INFO L231 Difference]: Finished difference. Result has 108 places, 115 transitions, 454 flow [2023-11-29 05:28:41,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=127, PETRI_DIFFERENCE_MINUEND_FLOW=358, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=454, PETRI_PLACES=108, PETRI_TRANSITIONS=115} [2023-11-29 05:28:41,020 INFO L281 CegarLoopForPetriNet]: 117 programPoint places, -9 predicate places. [2023-11-29 05:28:41,020 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 115 transitions, 454 flow [2023-11-29 05:28:41,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 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 05:28:41,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:28:41,020 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:28:41,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-29 05:28:41,021 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread4Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-29 05:28:41,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:28:41,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1765471289, now seen corresponding path program 1 times [2023-11-29 05:28:41,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:28:41,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139382907] [2023-11-29 05:28:41,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:28:41,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:28:41,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:28:41,122 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 05:28:41,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:28:41,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139382907] [2023-11-29 05:28:41,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139382907] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:28:41,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:28:41,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 05:28:41,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285180799] [2023-11-29 05:28:41,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:28:41,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:28:41,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:28:41,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:28:41,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:28:41,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 127 [2023-11-29 05:28:41,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 115 transitions, 454 flow. Second operand has 3 states, 3 states have (on average 79.0) internal successors, (237), 3 states have internal predecessors, (237), 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 05:28:41,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:28:41,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 127 [2023-11-29 05:28:41,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:28:42,489 INFO L124 PetriNetUnfolderBase]: 7120/13689 cut-off events. [2023-11-29 05:28:42,489 INFO L125 PetriNetUnfolderBase]: For 4673/4675 co-relation queries the response was YES. [2023-11-29 05:28:42,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27421 conditions, 13689 events. 7120/13689 cut-off events. For 4673/4675 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 115781 event pairs, 3445 based on Foata normal form. 730/12344 useless extension candidates. Maximal degree in co-relation 27407. Up to 8521 conditions per place. [2023-11-29 05:28:42,589 INFO L140 encePairwiseOnDemand]: 123/127 looper letters, 56 selfloop transitions, 10 changer transitions 0/128 dead transitions. [2023-11-29 05:28:42,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 128 transitions, 623 flow [2023-11-29 05:28:42,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:28:42,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 05:28:42,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 285 transitions. [2023-11-29 05:28:42,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7480314960629921 [2023-11-29 05:28:42,592 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 285 transitions. [2023-11-29 05:28:42,592 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 285 transitions. [2023-11-29 05:28:42,593 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:28:42,593 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 285 transitions. [2023-11-29 05:28:42,594 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 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 05:28:42,595 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 127.0) internal successors, (508), 4 states have internal predecessors, (508), 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 05:28:42,596 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 127.0) internal successors, (508), 4 states have internal predecessors, (508), 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 05:28:42,596 INFO L175 Difference]: Start difference. First operand has 108 places, 115 transitions, 454 flow. Second operand 3 states and 285 transitions. [2023-11-29 05:28:42,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 128 transitions, 623 flow [2023-11-29 05:28:42,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 128 transitions, 605 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 05:28:42,618 INFO L231 Difference]: Finished difference. Result has 106 places, 113 transitions, 452 flow [2023-11-29 05:28:42,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=127, PETRI_DIFFERENCE_MINUEND_FLOW=432, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=452, PETRI_PLACES=106, PETRI_TRANSITIONS=113} [2023-11-29 05:28:42,619 INFO L281 CegarLoopForPetriNet]: 117 programPoint places, -11 predicate places. [2023-11-29 05:28:42,620 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 113 transitions, 452 flow [2023-11-29 05:28:42,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 79.0) internal successors, (237), 3 states have internal predecessors, (237), 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 05:28:42,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:28:42,620 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:28:42,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-29 05:28:42,620 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread4Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-29 05:28:42,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:28:42,621 INFO L85 PathProgramCache]: Analyzing trace with hash -1013724110, now seen corresponding path program 1 times [2023-11-29 05:28:42,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:28:42,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130535857] [2023-11-29 05:28:42,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:28:42,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:28:42,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:28:42,713 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 05:28:42,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:28:42,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130535857] [2023-11-29 05:28:42,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130535857] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:28:42,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:28:42,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 05:28:42,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052377031] [2023-11-29 05:28:42,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:28:42,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:28:42,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:28:42,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:28:42,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:28:42,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 127 [2023-11-29 05:28:42,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 113 transitions, 452 flow. Second operand has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 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 05:28:42,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:28:42,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 127 [2023-11-29 05:28:42,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:28:44,010 INFO L124 PetriNetUnfolderBase]: 7120/13431 cut-off events. [2023-11-29 05:28:44,010 INFO L125 PetriNetUnfolderBase]: For 3933/3935 co-relation queries the response was YES. [2023-11-29 05:28:44,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27027 conditions, 13431 events. 7120/13431 cut-off events. For 3933/3935 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 111295 event pairs, 3445 based on Foata normal form. 438/12022 useless extension candidates. Maximal degree in co-relation 27013. Up to 8521 conditions per place. [2023-11-29 05:28:44,096 INFO L140 encePairwiseOnDemand]: 123/127 looper letters, 56 selfloop transitions, 10 changer transitions 0/126 dead transitions. [2023-11-29 05:28:44,096 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 126 transitions, 621 flow [2023-11-29 05:28:44,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:28:44,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 05:28:44,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 285 transitions. [2023-11-29 05:28:44,098 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7480314960629921 [2023-11-29 05:28:44,098 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 285 transitions. [2023-11-29 05:28:44,098 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 285 transitions. [2023-11-29 05:28:44,098 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:28:44,098 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 285 transitions. [2023-11-29 05:28:44,099 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 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 05:28:44,100 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 127.0) internal successors, (508), 4 states have internal predecessors, (508), 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 05:28:44,100 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 127.0) internal successors, (508), 4 states have internal predecessors, (508), 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 05:28:44,100 INFO L175 Difference]: Start difference. First operand has 106 places, 113 transitions, 452 flow. Second operand 3 states and 285 transitions. [2023-11-29 05:28:44,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 126 transitions, 621 flow [2023-11-29 05:28:44,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 126 transitions, 601 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 05:28:44,112 INFO L231 Difference]: Finished difference. Result has 104 places, 111 transitions, 448 flow [2023-11-29 05:28:44,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=127, PETRI_DIFFERENCE_MINUEND_FLOW=428, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=448, PETRI_PLACES=104, PETRI_TRANSITIONS=111} [2023-11-29 05:28:44,113 INFO L281 CegarLoopForPetriNet]: 117 programPoint places, -13 predicate places. [2023-11-29 05:28:44,113 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 111 transitions, 448 flow [2023-11-29 05:28:44,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 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 05:28:44,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:28:44,113 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:28:44,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-29 05:28:44,114 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread4Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-29 05:28:44,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:28:44,114 INFO L85 PathProgramCache]: Analyzing trace with hash -1013724111, now seen corresponding path program 1 times [2023-11-29 05:28:44,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:28:44,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225816334] [2023-11-29 05:28:44,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:28:44,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:28:44,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:28:44,161 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 05:28:44,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:28:44,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225816334] [2023-11-29 05:28:44,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225816334] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:28:44,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:28:44,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 05:28:44,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257783638] [2023-11-29 05:28:44,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:28:44,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:28:44,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:28:44,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:28:44,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:28:44,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 127 [2023-11-29 05:28:44,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 111 transitions, 448 flow. Second operand has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 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 05:28:44,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:28:44,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 127 [2023-11-29 05:28:44,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:28:45,807 INFO L124 PetriNetUnfolderBase]: 8669/15695 cut-off events. [2023-11-29 05:28:45,808 INFO L125 PetriNetUnfolderBase]: For 4711/4711 co-relation queries the response was YES. [2023-11-29 05:28:45,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31858 conditions, 15695 events. 8669/15695 cut-off events. For 4711/4711 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 130310 event pairs, 2621 based on Foata normal form. 0/13314 useless extension candidates. Maximal degree in co-relation 31844. Up to 9840 conditions per place. [2023-11-29 05:28:45,917 INFO L140 encePairwiseOnDemand]: 120/127 looper letters, 75 selfloop transitions, 13 changer transitions 0/144 dead transitions. [2023-11-29 05:28:45,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 144 transitions, 743 flow [2023-11-29 05:28:45,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:28:45,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 05:28:45,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 298 transitions. [2023-11-29 05:28:45,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7821522309711286 [2023-11-29 05:28:45,919 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 298 transitions. [2023-11-29 05:28:45,920 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 298 transitions. [2023-11-29 05:28:45,920 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:28:45,920 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 298 transitions. [2023-11-29 05:28:45,921 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 99.33333333333333) internal successors, (298), 3 states have internal predecessors, (298), 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 05:28:45,922 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 127.0) internal successors, (508), 4 states have internal predecessors, (508), 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 05:28:45,922 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 127.0) internal successors, (508), 4 states have internal predecessors, (508), 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 05:28:45,922 INFO L175 Difference]: Start difference. First operand has 104 places, 111 transitions, 448 flow. Second operand 3 states and 298 transitions. [2023-11-29 05:28:45,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 144 transitions, 743 flow [2023-11-29 05:28:45,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 144 transitions, 715 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 05:28:45,929 INFO L231 Difference]: Finished difference. Result has 106 places, 117 transitions, 536 flow [2023-11-29 05:28:45,930 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=127, PETRI_DIFFERENCE_MINUEND_FLOW=428, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=536, PETRI_PLACES=106, PETRI_TRANSITIONS=117} [2023-11-29 05:28:45,930 INFO L281 CegarLoopForPetriNet]: 117 programPoint places, -11 predicate places. [2023-11-29 05:28:45,930 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 117 transitions, 536 flow [2023-11-29 05:28:45,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 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 05:28:45,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:28:45,931 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] [2023-11-29 05:28:45,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-29 05:28:45,931 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-29 05:28:45,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:28:45,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1487123797, now seen corresponding path program 1 times [2023-11-29 05:28:45,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:28:45,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775963728] [2023-11-29 05:28:45,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:28:45,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:28:45,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:28:46,020 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 05:28:46,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:28:46,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775963728] [2023-11-29 05:28:46,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775963728] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:28:46,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:28:46,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 05:28:46,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039785083] [2023-11-29 05:28:46,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:28:46,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:28:46,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:28:46,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:28:46,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:28:46,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 127 [2023-11-29 05:28:46,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 117 transitions, 536 flow. Second operand has 3 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 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 05:28:46,026 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:28:46,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 127 [2023-11-29 05:28:46,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:28:47,443 INFO L124 PetriNetUnfolderBase]: 6844/13224 cut-off events. [2023-11-29 05:28:47,443 INFO L125 PetriNetUnfolderBase]: For 6532/6532 co-relation queries the response was YES. [2023-11-29 05:28:47,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26970 conditions, 13224 events. 6844/13224 cut-off events. For 6532/6532 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 110534 event pairs, 4740 based on Foata normal form. 79/11601 useless extension candidates. Maximal degree in co-relation 26955. Up to 8329 conditions per place. [2023-11-29 05:28:47,535 INFO L140 encePairwiseOnDemand]: 124/127 looper letters, 72 selfloop transitions, 2 changer transitions 0/135 dead transitions. [2023-11-29 05:28:47,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 135 transitions, 747 flow [2023-11-29 05:28:47,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:28:47,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 05:28:47,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 290 transitions. [2023-11-29 05:28:47,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7611548556430446 [2023-11-29 05:28:47,538 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 290 transitions. [2023-11-29 05:28:47,538 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 290 transitions. [2023-11-29 05:28:47,538 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:28:47,538 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 290 transitions. [2023-11-29 05:28:47,539 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 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 05:28:47,540 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 127.0) internal successors, (508), 4 states have internal predecessors, (508), 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 05:28:47,541 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 127.0) internal successors, (508), 4 states have internal predecessors, (508), 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 05:28:47,541 INFO L175 Difference]: Start difference. First operand has 106 places, 117 transitions, 536 flow. Second operand 3 states and 290 transitions. [2023-11-29 05:28:47,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 135 transitions, 747 flow [2023-11-29 05:28:47,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 135 transitions, 717 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 05:28:47,553 INFO L231 Difference]: Finished difference. Result has 107 places, 117 transitions, 518 flow [2023-11-29 05:28:47,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=127, PETRI_DIFFERENCE_MINUEND_FLOW=510, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=518, PETRI_PLACES=107, PETRI_TRANSITIONS=117} [2023-11-29 05:28:47,554 INFO L281 CegarLoopForPetriNet]: 117 programPoint places, -10 predicate places. [2023-11-29 05:28:47,554 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 117 transitions, 518 flow [2023-11-29 05:28:47,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 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 05:28:47,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:28:47,555 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] [2023-11-29 05:28:47,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-29 05:28:47,555 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-29 05:28:47,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:28:47,555 INFO L85 PathProgramCache]: Analyzing trace with hash -1205056405, now seen corresponding path program 2 times [2023-11-29 05:28:47,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:28:47,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184469305] [2023-11-29 05:28:47,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:28:47,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:28:47,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:28:47,907 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 05:28:47,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:28:47,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184469305] [2023-11-29 05:28:47,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184469305] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:28:47,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:28:47,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 05:28:47,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874190040] [2023-11-29 05:28:47,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:28:47,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 05:28:47,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:28:47,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 05:28:47,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 05:28:48,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 127 [2023-11-29 05:28:48,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 117 transitions, 518 flow. Second operand has 4 states, 4 states have (on average 79.0) internal successors, (316), 4 states have internal predecessors, (316), 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 05:28:48,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:28:48,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 127 [2023-11-29 05:28:48,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:28:49,480 INFO L124 PetriNetUnfolderBase]: 6942/13093 cut-off events. [2023-11-29 05:28:49,480 INFO L125 PetriNetUnfolderBase]: For 5961/5961 co-relation queries the response was YES. [2023-11-29 05:28:49,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27494 conditions, 13093 events. 6942/13093 cut-off events. For 5961/5961 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 107949 event pairs, 2537 based on Foata normal form. 0/11471 useless extension candidates. Maximal degree in co-relation 27478. Up to 6536 conditions per place. [2023-11-29 05:28:49,550 INFO L140 encePairwiseOnDemand]: 120/127 looper letters, 77 selfloop transitions, 18 changer transitions 0/151 dead transitions. [2023-11-29 05:28:49,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 151 transitions, 806 flow [2023-11-29 05:28:49,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 05:28:49,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 05:28:49,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 378 transitions. [2023-11-29 05:28:49,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7440944881889764 [2023-11-29 05:28:49,552 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 378 transitions. [2023-11-29 05:28:49,552 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 378 transitions. [2023-11-29 05:28:49,552 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:28:49,552 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 378 transitions. [2023-11-29 05:28:49,553 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 94.5) internal successors, (378), 4 states have internal predecessors, (378), 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 05:28:49,554 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 127.0) internal successors, (635), 5 states have internal predecessors, (635), 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 05:28:49,555 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 127.0) internal successors, (635), 5 states have internal predecessors, (635), 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 05:28:49,555 INFO L175 Difference]: Start difference. First operand has 107 places, 117 transitions, 518 flow. Second operand 4 states and 378 transitions. [2023-11-29 05:28:49,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 151 transitions, 806 flow [2023-11-29 05:28:49,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 151 transitions, 800 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 05:28:49,566 INFO L231 Difference]: Finished difference. Result has 109 places, 118 transitions, 595 flow [2023-11-29 05:28:49,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=127, PETRI_DIFFERENCE_MINUEND_FLOW=510, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=595, PETRI_PLACES=109, PETRI_TRANSITIONS=118} [2023-11-29 05:28:49,567 INFO L281 CegarLoopForPetriNet]: 117 programPoint places, -8 predicate places. [2023-11-29 05:28:49,567 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 118 transitions, 595 flow [2023-11-29 05:28:49,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 79.0) internal successors, (316), 4 states have internal predecessors, (316), 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 05:28:49,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:28:49,567 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] [2023-11-29 05:28:49,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-29 05:28:49,567 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread4Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-29 05:28:49,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:28:49,568 INFO L85 PathProgramCache]: Analyzing trace with hash 845171704, now seen corresponding path program 1 times [2023-11-29 05:28:49,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:28:49,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656737469] [2023-11-29 05:28:49,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:28:49,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:28:49,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:28:49,674 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 05:28:49,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:28:49,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656737469] [2023-11-29 05:28:49,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656737469] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:28:49,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:28:49,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 05:28:49,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574667725] [2023-11-29 05:28:49,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:28:49,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:28:49,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:28:49,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:28:49,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:28:49,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 127 [2023-11-29 05:28:49,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 118 transitions, 595 flow. Second operand has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 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 05:28:49,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:28:49,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 127 [2023-11-29 05:28:49,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:28:51,061 INFO L124 PetriNetUnfolderBase]: 7280/13989 cut-off events. [2023-11-29 05:28:51,062 INFO L125 PetriNetUnfolderBase]: For 8800/8816 co-relation queries the response was YES. [2023-11-29 05:28:51,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29405 conditions, 13989 events. 7280/13989 cut-off events. For 8800/8816 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 118219 event pairs, 5014 based on Foata normal form. 75/12254 useless extension candidates. Maximal degree in co-relation 29386. Up to 8910 conditions per place. [2023-11-29 05:28:51,151 INFO L140 encePairwiseOnDemand]: 124/127 looper letters, 74 selfloop transitions, 3 changer transitions 0/138 dead transitions. [2023-11-29 05:28:51,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 138 transitions, 816 flow [2023-11-29 05:28:51,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:28:51,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 05:28:51,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 292 transitions. [2023-11-29 05:28:51,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7664041994750657 [2023-11-29 05:28:51,153 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 292 transitions. [2023-11-29 05:28:51,153 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 292 transitions. [2023-11-29 05:28:51,153 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:28:51,153 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 292 transitions. [2023-11-29 05:28:51,154 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 97.33333333333333) internal successors, (292), 3 states have internal predecessors, (292), 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 05:28:51,155 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 127.0) internal successors, (508), 4 states have internal predecessors, (508), 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 05:28:51,155 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 127.0) internal successors, (508), 4 states have internal predecessors, (508), 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 05:28:51,155 INFO L175 Difference]: Start difference. First operand has 109 places, 118 transitions, 595 flow. Second operand 3 states and 292 transitions. [2023-11-29 05:28:51,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 138 transitions, 816 flow [2023-11-29 05:28:51,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 138 transitions, 804 flow, removed 6 selfloop flow, removed 0 redundant places. [2023-11-29 05:28:51,186 INFO L231 Difference]: Finished difference. Result has 112 places, 118 transitions, 594 flow [2023-11-29 05:28:51,186 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=127, PETRI_DIFFERENCE_MINUEND_FLOW=583, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=594, PETRI_PLACES=112, PETRI_TRANSITIONS=118} [2023-11-29 05:28:51,187 INFO L281 CegarLoopForPetriNet]: 117 programPoint places, -5 predicate places. [2023-11-29 05:28:51,187 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 118 transitions, 594 flow [2023-11-29 05:28:51,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 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 05:28:51,188 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:28:51,188 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] [2023-11-29 05:28:51,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-29 05:28:51,188 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread4Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-29 05:28:51,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:28:51,189 INFO L85 PathProgramCache]: Analyzing trace with hash -1114652442, now seen corresponding path program 2 times [2023-11-29 05:28:51,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:28:51,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679583510] [2023-11-29 05:28:51,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:28:51,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:28:51,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:28:51,418 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 05:28:51,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:28:51,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679583510] [2023-11-29 05:28:51,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679583510] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:28:51,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:28:51,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 05:28:51,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355881531] [2023-11-29 05:28:51,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:28:51,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 05:28:51,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:28:51,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 05:28:51,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-29 05:28:51,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 127 [2023-11-29 05:28:51,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 118 transitions, 594 flow. Second operand has 6 states, 6 states have (on average 70.66666666666667) internal successors, (424), 6 states have internal predecessors, (424), 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 05:28:51,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:28:51,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 127 [2023-11-29 05:28:51,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:28:53,922 INFO L124 PetriNetUnfolderBase]: 12737/21030 cut-off events. [2023-11-29 05:28:53,922 INFO L125 PetriNetUnfolderBase]: For 12463/12469 co-relation queries the response was YES. [2023-11-29 05:28:54,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46715 conditions, 21030 events. 12737/21030 cut-off events. For 12463/12469 co-relation queries the response was YES. Maximal size of possible extension queue 704. Compared 165781 event pairs, 3883 based on Foata normal form. 0/18270 useless extension candidates. Maximal degree in co-relation 46694. Up to 13377 conditions per place. [2023-11-29 05:28:54,094 INFO L140 encePairwiseOnDemand]: 117/127 looper letters, 109 selfloop transitions, 27 changer transitions 0/180 dead transitions. [2023-11-29 05:28:54,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 180 transitions, 1058 flow [2023-11-29 05:28:54,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 05:28:54,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 05:28:54,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 520 transitions. [2023-11-29 05:28:54,097 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6824146981627297 [2023-11-29 05:28:54,097 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 520 transitions. [2023-11-29 05:28:54,097 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 520 transitions. [2023-11-29 05:28:54,097 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:28:54,097 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 520 transitions. [2023-11-29 05:28:54,099 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 86.66666666666667) internal successors, (520), 6 states have internal predecessors, (520), 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 05:28:54,101 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 127.0) internal successors, (889), 7 states have internal predecessors, (889), 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 05:28:54,102 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 127.0) internal successors, (889), 7 states have internal predecessors, (889), 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 05:28:54,102 INFO L175 Difference]: Start difference. First operand has 112 places, 118 transitions, 594 flow. Second operand 6 states and 520 transitions. [2023-11-29 05:28:54,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 180 transitions, 1058 flow [2023-11-29 05:28:54,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 180 transitions, 1050 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 05:28:54,130 INFO L231 Difference]: Finished difference. Result has 114 places, 121 transitions, 674 flow [2023-11-29 05:28:54,130 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=127, PETRI_DIFFERENCE_MINUEND_FLOW=580, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=674, PETRI_PLACES=114, PETRI_TRANSITIONS=121} [2023-11-29 05:28:54,131 INFO L281 CegarLoopForPetriNet]: 117 programPoint places, -3 predicate places. [2023-11-29 05:28:54,131 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 121 transitions, 674 flow [2023-11-29 05:28:54,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 70.66666666666667) internal successors, (424), 6 states have internal predecessors, (424), 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 05:28:54,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:28:54,132 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] [2023-11-29 05:28:54,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-29 05:28:54,132 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-29 05:28:54,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:28:54,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1282180958, now seen corresponding path program 1 times [2023-11-29 05:28:54,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:28:54,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173992375] [2023-11-29 05:28:54,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:28:54,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:28:54,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:28:54,358 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 05:28:54,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:28:54,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173992375] [2023-11-29 05:28:54,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173992375] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:28:54,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:28:54,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 05:28:54,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17496898] [2023-11-29 05:28:54,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:28:54,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 05:28:54,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:28:54,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 05:28:54,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 05:28:54,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 127 [2023-11-29 05:28:54,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 121 transitions, 674 flow. Second operand has 4 states, 4 states have (on average 79.75) internal successors, (319), 4 states have internal predecessors, (319), 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 05:28:54,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:28:54,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 127 [2023-11-29 05:28:54,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:28:56,732 INFO L124 PetriNetUnfolderBase]: 9938/17964 cut-off events. [2023-11-29 05:28:56,732 INFO L125 PetriNetUnfolderBase]: For 16484/16484 co-relation queries the response was YES. [2023-11-29 05:28:56,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39930 conditions, 17964 events. 9938/17964 cut-off events. For 16484/16484 co-relation queries the response was YES. Maximal size of possible extension queue 577. Compared 149983 event pairs, 6723 based on Foata normal form. 0/15822 useless extension candidates. Maximal degree in co-relation 39908. Up to 10046 conditions per place. [2023-11-29 05:28:56,876 INFO L140 encePairwiseOnDemand]: 121/127 looper letters, 85 selfloop transitions, 24 changer transitions 0/168 dead transitions. [2023-11-29 05:28:56,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 168 transitions, 1039 flow [2023-11-29 05:28:56,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 05:28:56,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 05:28:56,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 390 transitions. [2023-11-29 05:28:56,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7677165354330708 [2023-11-29 05:28:56,879 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 390 transitions. [2023-11-29 05:28:56,879 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 390 transitions. [2023-11-29 05:28:56,879 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:28:56,879 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 390 transitions. [2023-11-29 05:28:56,880 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 97.5) internal successors, (390), 4 states have internal predecessors, (390), 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 05:28:56,882 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 127.0) internal successors, (635), 5 states have internal predecessors, (635), 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 05:28:56,882 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 127.0) internal successors, (635), 5 states have internal predecessors, (635), 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 05:28:56,882 INFO L175 Difference]: Start difference. First operand has 114 places, 121 transitions, 674 flow. Second operand 4 states and 390 transitions. [2023-11-29 05:28:56,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 168 transitions, 1039 flow [2023-11-29 05:28:56,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 168 transitions, 1037 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-11-29 05:28:56,959 INFO L231 Difference]: Finished difference. Result has 119 places, 124 transitions, 795 flow [2023-11-29 05:28:56,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=127, PETRI_DIFFERENCE_MINUEND_FLOW=672, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=795, PETRI_PLACES=119, PETRI_TRANSITIONS=124} [2023-11-29 05:28:56,959 INFO L281 CegarLoopForPetriNet]: 117 programPoint places, 2 predicate places. [2023-11-29 05:28:56,959 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 124 transitions, 795 flow [2023-11-29 05:28:56,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 79.75) internal successors, (319), 4 states have internal predecessors, (319), 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 05:28:56,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:28:56,960 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] [2023-11-29 05:28:56,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-29 05:28:56,960 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-29 05:28:56,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:28:56,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1238286945, now seen corresponding path program 1 times [2023-11-29 05:28:56,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:28:56,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112978388] [2023-11-29 05:28:56,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:28:56,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:28:56,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:28:57,085 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 05:28:57,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:28:57,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112978388] [2023-11-29 05:28:57,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112978388] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:28:57,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:28:57,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 05:28:57,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180847252] [2023-11-29 05:28:57,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:28:57,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:28:57,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:28:57,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:28:57,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:28:57,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 127 [2023-11-29 05:28:57,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 124 transitions, 795 flow. Second operand has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 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 05:28:57,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:28:57,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 127 [2023-11-29 05:28:57,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:28:58,742 INFO L124 PetriNetUnfolderBase]: 5996/11493 cut-off events. [2023-11-29 05:28:58,742 INFO L125 PetriNetUnfolderBase]: For 15955/15963 co-relation queries the response was YES. [2023-11-29 05:28:58,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25819 conditions, 11493 events. 5996/11493 cut-off events. For 15955/15963 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 90918 event pairs, 3988 based on Foata normal form. 86/10608 useless extension candidates. Maximal degree in co-relation 25793. Up to 7328 conditions per place. [2023-11-29 05:28:58,832 INFO L140 encePairwiseOnDemand]: 124/127 looper letters, 75 selfloop transitions, 3 changer transitions 0/141 dead transitions. [2023-11-29 05:28:58,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 141 transitions, 1030 flow [2023-11-29 05:28:58,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:28:58,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 05:28:58,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 289 transitions. [2023-11-29 05:28:58,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7585301837270341 [2023-11-29 05:28:58,834 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 289 transitions. [2023-11-29 05:28:58,834 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 289 transitions. [2023-11-29 05:28:58,834 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:28:58,835 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 289 transitions. [2023-11-29 05:28:58,836 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 96.33333333333333) internal successors, (289), 3 states have internal predecessors, (289), 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 05:28:58,837 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 127.0) internal successors, (508), 4 states have internal predecessors, (508), 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 05:28:58,837 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 127.0) internal successors, (508), 4 states have internal predecessors, (508), 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 05:28:58,837 INFO L175 Difference]: Start difference. First operand has 119 places, 124 transitions, 795 flow. Second operand 3 states and 289 transitions. [2023-11-29 05:28:58,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 141 transitions, 1030 flow [2023-11-29 05:28:58,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 141 transitions, 1030 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-29 05:28:58,925 INFO L231 Difference]: Finished difference. Result has 122 places, 124 transitions, 806 flow [2023-11-29 05:28:58,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=127, PETRI_DIFFERENCE_MINUEND_FLOW=795, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=806, PETRI_PLACES=122, PETRI_TRANSITIONS=124} [2023-11-29 05:28:58,925 INFO L281 CegarLoopForPetriNet]: 117 programPoint places, 5 predicate places. [2023-11-29 05:28:58,925 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 124 transitions, 806 flow [2023-11-29 05:28:58,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 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 05:28:58,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:28:58,926 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] [2023-11-29 05:28:58,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-29 05:28:58,926 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-29 05:28:58,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:28:58,926 INFO L85 PathProgramCache]: Analyzing trace with hash -1944934323, now seen corresponding path program 2 times [2023-11-29 05:28:58,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:28:58,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695198100] [2023-11-29 05:28:58,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:28:58,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:28:58,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:28:59,006 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 05:28:59,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:28:59,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695198100] [2023-11-29 05:28:59,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695198100] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:28:59,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:28:59,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 05:28:59,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530129446] [2023-11-29 05:28:59,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:28:59,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:28:59,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:28:59,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:28:59,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:28:59,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 127 [2023-11-29 05:28:59,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 124 transitions, 806 flow. Second operand has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 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 05:28:59,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:28:59,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 127 [2023-11-29 05:28:59,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:29:00,594 INFO L124 PetriNetUnfolderBase]: 6410/12184 cut-off events. [2023-11-29 05:29:00,594 INFO L125 PetriNetUnfolderBase]: For 19894/19956 co-relation queries the response was YES. [2023-11-29 05:29:00,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28151 conditions, 12184 events. 6410/12184 cut-off events. For 19894/19956 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 97623 event pairs, 4223 based on Foata normal form. 90/11034 useless extension candidates. Maximal degree in co-relation 28123. Up to 7887 conditions per place. [2023-11-29 05:29:00,664 INFO L140 encePairwiseOnDemand]: 124/127 looper letters, 77 selfloop transitions, 3 changer transitions 0/143 dead transitions. [2023-11-29 05:29:00,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 143 transitions, 1050 flow [2023-11-29 05:29:00,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:29:00,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 05:29:00,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 291 transitions. [2023-11-29 05:29:00,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7637795275590551 [2023-11-29 05:29:00,666 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 291 transitions. [2023-11-29 05:29:00,666 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 291 transitions. [2023-11-29 05:29:00,666 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:29:00,666 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 291 transitions. [2023-11-29 05:29:00,667 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 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 05:29:00,668 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 127.0) internal successors, (508), 4 states have internal predecessors, (508), 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 05:29:00,668 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 127.0) internal successors, (508), 4 states have internal predecessors, (508), 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 05:29:00,669 INFO L175 Difference]: Start difference. First operand has 122 places, 124 transitions, 806 flow. Second operand 3 states and 291 transitions. [2023-11-29 05:29:00,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 143 transitions, 1050 flow [2023-11-29 05:29:00,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 143 transitions, 1044 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 05:29:00,737 INFO L231 Difference]: Finished difference. Result has 123 places, 124 transitions, 811 flow [2023-11-29 05:29:00,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=127, PETRI_DIFFERENCE_MINUEND_FLOW=800, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=811, PETRI_PLACES=123, PETRI_TRANSITIONS=124} [2023-11-29 05:29:00,738 INFO L281 CegarLoopForPetriNet]: 117 programPoint places, 6 predicate places. [2023-11-29 05:29:00,738 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 124 transitions, 811 flow [2023-11-29 05:29:00,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 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 05:29:00,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:29:00,739 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] [2023-11-29 05:29:00,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-11-29 05:29:00,739 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-29 05:29:00,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:29:00,739 INFO L85 PathProgramCache]: Analyzing trace with hash -777704215, now seen corresponding path program 3 times [2023-11-29 05:29:00,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:29:00,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757136023] [2023-11-29 05:29:00,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:29:00,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:29:00,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:29:01,174 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 05:29:01,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:29:01,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757136023] [2023-11-29 05:29:01,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757136023] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:29:01,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:29:01,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 05:29:01,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152905685] [2023-11-29 05:29:01,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:29:01,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 05:29:01,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:29:01,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 05:29:01,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-29 05:29:01,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 127 [2023-11-29 05:29:01,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 124 transitions, 811 flow. Second operand has 6 states, 6 states have (on average 74.16666666666667) internal successors, (445), 6 states have internal predecessors, (445), 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 05:29:01,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:29:01,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 127 [2023-11-29 05:29:01,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:29:04,749 INFO L124 PetriNetUnfolderBase]: 14652/25909 cut-off events. [2023-11-29 05:29:04,749 INFO L125 PetriNetUnfolderBase]: For 38037/38043 co-relation queries the response was YES. [2023-11-29 05:29:04,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61208 conditions, 25909 events. 14652/25909 cut-off events. For 38037/38043 co-relation queries the response was YES. Maximal size of possible extension queue 1006. Compared 218713 event pairs, 6737 based on Foata normal form. 57/23226 useless extension candidates. Maximal degree in co-relation 61179. Up to 8030 conditions per place. [2023-11-29 05:29:04,983 INFO L140 encePairwiseOnDemand]: 116/127 looper letters, 154 selfloop transitions, 31 changer transitions 0/237 dead transitions. [2023-11-29 05:29:04,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 237 transitions, 1607 flow [2023-11-29 05:29:04,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 05:29:04,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-29 05:29:04,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 659 transitions. [2023-11-29 05:29:04,985 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7412823397075365 [2023-11-29 05:29:04,985 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 659 transitions. [2023-11-29 05:29:04,985 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 659 transitions. [2023-11-29 05:29:04,986 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:29:04,986 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 659 transitions. [2023-11-29 05:29:04,987 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 94.14285714285714) internal successors, (659), 7 states have internal predecessors, (659), 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 05:29:04,988 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 127.0) internal successors, (1016), 8 states have internal predecessors, (1016), 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 05:29:04,989 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 127.0) internal successors, (1016), 8 states have internal predecessors, (1016), 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 05:29:04,989 INFO L175 Difference]: Start difference. First operand has 123 places, 124 transitions, 811 flow. Second operand 7 states and 659 transitions. [2023-11-29 05:29:04,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 237 transitions, 1607 flow [2023-11-29 05:29:05,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 237 transitions, 1599 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 05:29:05,098 INFO L231 Difference]: Finished difference. Result has 129 places, 134 transitions, 1041 flow [2023-11-29 05:29:05,098 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=127, PETRI_DIFFERENCE_MINUEND_FLOW=805, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1041, PETRI_PLACES=129, PETRI_TRANSITIONS=134} [2023-11-29 05:29:05,099 INFO L281 CegarLoopForPetriNet]: 117 programPoint places, 12 predicate places. [2023-11-29 05:29:05,099 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 134 transitions, 1041 flow [2023-11-29 05:29:05,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 74.16666666666667) internal successors, (445), 6 states have internal predecessors, (445), 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 05:29:05,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:29:05,099 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] [2023-11-29 05:29:05,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-11-29 05:29:05,100 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-29 05:29:05,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:29:05,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1634346249, now seen corresponding path program 1 times [2023-11-29 05:29:05,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:29:05,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674210362] [2023-11-29 05:29:05,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:29:05,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:29:05,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:29:05,299 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 05:29:05,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:29:05,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674210362] [2023-11-29 05:29:05,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674210362] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:29:05,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:29:05,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 05:29:05,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246320447] [2023-11-29 05:29:05,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:29:05,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 05:29:05,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:29:05,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 05:29:05,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 05:29:05,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 127 [2023-11-29 05:29:05,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 134 transitions, 1041 flow. Second operand has 4 states, 4 states have (on average 79.75) internal successors, (319), 4 states have internal predecessors, (319), 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 05:29:05,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:29:05,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 127 [2023-11-29 05:29:05,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:29:08,610 INFO L124 PetriNetUnfolderBase]: 15627/27444 cut-off events. [2023-11-29 05:29:08,610 INFO L125 PetriNetUnfolderBase]: For 54299/54301 co-relation queries the response was YES. [2023-11-29 05:29:08,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65667 conditions, 27444 events. 15627/27444 cut-off events. For 54299/54301 co-relation queries the response was YES. Maximal size of possible extension queue 1046. Compared 232433 event pairs, 7362 based on Foata normal form. 180/24596 useless extension candidates. Maximal degree in co-relation 65635. Up to 16879 conditions per place. [2023-11-29 05:29:08,890 INFO L140 encePairwiseOnDemand]: 121/127 looper letters, 91 selfloop transitions, 31 changer transitions 0/183 dead transitions. [2023-11-29 05:29:08,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 183 transitions, 1472 flow [2023-11-29 05:29:08,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 05:29:08,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 05:29:08,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 391 transitions. [2023-11-29 05:29:08,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7696850393700787 [2023-11-29 05:29:08,893 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 391 transitions. [2023-11-29 05:29:08,893 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 391 transitions. [2023-11-29 05:29:08,894 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:29:08,894 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 391 transitions. [2023-11-29 05:29:08,896 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 97.75) internal successors, (391), 4 states have internal predecessors, (391), 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 05:29:08,897 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 127.0) internal successors, (635), 5 states have internal predecessors, (635), 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 05:29:08,897 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 127.0) internal successors, (635), 5 states have internal predecessors, (635), 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 05:29:08,897 INFO L175 Difference]: Start difference. First operand has 129 places, 134 transitions, 1041 flow. Second operand 4 states and 391 transitions. [2023-11-29 05:29:08,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 183 transitions, 1472 flow [2023-11-29 05:29:09,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 183 transitions, 1438 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-11-29 05:29:09,094 INFO L231 Difference]: Finished difference. Result has 132 places, 138 transitions, 1190 flow [2023-11-29 05:29:09,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=127, PETRI_DIFFERENCE_MINUEND_FLOW=1009, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1190, PETRI_PLACES=132, PETRI_TRANSITIONS=138} [2023-11-29 05:29:09,094 INFO L281 CegarLoopForPetriNet]: 117 programPoint places, 15 predicate places. [2023-11-29 05:29:09,094 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 138 transitions, 1190 flow [2023-11-29 05:29:09,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 79.75) internal successors, (319), 4 states have internal predecessors, (319), 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 05:29:09,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:29:09,095 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] [2023-11-29 05:29:09,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-11-29 05:29:09,095 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-29 05:29:09,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:29:09,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1447787485, now seen corresponding path program 4 times [2023-11-29 05:29:09,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:29:09,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491136001] [2023-11-29 05:29:09,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:29:09,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:29:09,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:29:09,335 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 05:29:09,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:29:09,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491136001] [2023-11-29 05:29:09,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491136001] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:29:09,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:29:09,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 05:29:09,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708073052] [2023-11-29 05:29:09,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:29:09,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 05:29:09,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:29:09,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 05:29:09,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-29 05:29:09,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 127 [2023-11-29 05:29:09,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 138 transitions, 1190 flow. Second operand has 6 states, 6 states have (on average 70.66666666666667) internal successors, (424), 6 states have internal predecessors, (424), 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 05:29:09,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:29:09,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 127 [2023-11-29 05:29:09,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:29:13,624 INFO L124 PetriNetUnfolderBase]: 21734/35065 cut-off events. [2023-11-29 05:29:13,624 INFO L125 PetriNetUnfolderBase]: For 62339/62371 co-relation queries the response was YES. [2023-11-29 05:29:13,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84775 conditions, 35065 events. 21734/35065 cut-off events. For 62339/62371 co-relation queries the response was YES. Maximal size of possible extension queue 1349. Compared 280191 event pairs, 6151 based on Foata normal form. 57/31487 useless extension candidates. Maximal degree in co-relation 84740. Up to 23846 conditions per place. [2023-11-29 05:29:13,977 INFO L140 encePairwiseOnDemand]: 118/127 looper letters, 108 selfloop transitions, 43 changer transitions 0/200 dead transitions. [2023-11-29 05:29:13,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 200 transitions, 1746 flow [2023-11-29 05:29:13,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 05:29:13,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 05:29:13,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 517 transitions. [2023-11-29 05:29:13,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.678477690288714 [2023-11-29 05:29:13,980 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 517 transitions. [2023-11-29 05:29:13,980 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 517 transitions. [2023-11-29 05:29:13,981 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:29:13,981 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 517 transitions. [2023-11-29 05:29:13,982 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 86.16666666666667) internal successors, (517), 6 states have internal predecessors, (517), 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 05:29:13,983 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 127.0) internal successors, (889), 7 states have internal predecessors, (889), 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 05:29:13,983 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 127.0) internal successors, (889), 7 states have internal predecessors, (889), 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 05:29:13,984 INFO L175 Difference]: Start difference. First operand has 132 places, 138 transitions, 1190 flow. Second operand 6 states and 517 transitions. [2023-11-29 05:29:13,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 200 transitions, 1746 flow [2023-11-29 05:29:14,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 200 transitions, 1746 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-29 05:29:14,277 INFO L231 Difference]: Finished difference. Result has 136 places, 142 transitions, 1378 flow [2023-11-29 05:29:14,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=127, PETRI_DIFFERENCE_MINUEND_FLOW=1178, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1378, PETRI_PLACES=136, PETRI_TRANSITIONS=142} [2023-11-29 05:29:14,277 INFO L281 CegarLoopForPetriNet]: 117 programPoint places, 19 predicate places. [2023-11-29 05:29:14,277 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 142 transitions, 1378 flow [2023-11-29 05:29:14,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 70.66666666666667) internal successors, (424), 6 states have internal predecessors, (424), 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 05:29:14,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:29:14,278 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] [2023-11-29 05:29:14,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-11-29 05:29:14,278 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread4Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-29 05:29:14,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:29:14,278 INFO L85 PathProgramCache]: Analyzing trace with hash -210582775, now seen corresponding path program 1 times [2023-11-29 05:29:14,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:29:14,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033824578] [2023-11-29 05:29:14,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:29:14,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:29:14,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:29:14,611 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 05:29:14,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:29:14,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033824578] [2023-11-29 05:29:14,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033824578] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:29:14,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:29:14,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 05:29:14,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216435419] [2023-11-29 05:29:14,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:29:14,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 05:29:14,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:29:14,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 05:29:14,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-29 05:29:14,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 127 [2023-11-29 05:29:14,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 142 transitions, 1378 flow. Second operand has 7 states, 7 states have (on average 68.57142857142857) internal successors, (480), 7 states have internal predecessors, (480), 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 05:29:14,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:29:14,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 127 [2023-11-29 05:29:14,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:29:18,533 INFO L124 PetriNetUnfolderBase]: 17615/29337 cut-off events. [2023-11-29 05:29:18,533 INFO L125 PetriNetUnfolderBase]: For 68807/68835 co-relation queries the response was YES. [2023-11-29 05:29:18,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72779 conditions, 29337 events. 17615/29337 cut-off events. For 68807/68835 co-relation queries the response was YES. Maximal size of possible extension queue 1109. Compared 236279 event pairs, 8503 based on Foata normal form. 40/26501 useless extension candidates. Maximal degree in co-relation 72742. Up to 9557 conditions per place. [2023-11-29 05:29:18,845 INFO L140 encePairwiseOnDemand]: 117/127 looper letters, 142 selfloop transitions, 42 changer transitions 0/230 dead transitions. [2023-11-29 05:29:18,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 230 transitions, 2009 flow [2023-11-29 05:29:18,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 05:29:18,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-29 05:29:18,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 604 transitions. [2023-11-29 05:29:18,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6794150731158605 [2023-11-29 05:29:18,847 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 604 transitions. [2023-11-29 05:29:18,848 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 604 transitions. [2023-11-29 05:29:18,848 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:29:18,848 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 604 transitions. [2023-11-29 05:29:18,850 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 86.28571428571429) internal successors, (604), 7 states have internal predecessors, (604), 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 05:29:18,851 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 127.0) internal successors, (1016), 8 states have internal predecessors, (1016), 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 05:29:18,852 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 127.0) internal successors, (1016), 8 states have internal predecessors, (1016), 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 05:29:18,852 INFO L175 Difference]: Start difference. First operand has 136 places, 142 transitions, 1378 flow. Second operand 7 states and 604 transitions. [2023-11-29 05:29:18,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 230 transitions, 2009 flow [2023-11-29 05:29:19,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 230 transitions, 2003 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 05:29:19,157 INFO L231 Difference]: Finished difference. Result has 139 places, 140 transitions, 1448 flow [2023-11-29 05:29:19,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=127, PETRI_DIFFERENCE_MINUEND_FLOW=1364, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1448, PETRI_PLACES=139, PETRI_TRANSITIONS=140} [2023-11-29 05:29:19,157 INFO L281 CegarLoopForPetriNet]: 117 programPoint places, 22 predicate places. [2023-11-29 05:29:19,158 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 140 transitions, 1448 flow [2023-11-29 05:29:19,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 68.57142857142857) internal successors, (480), 7 states have internal predecessors, (480), 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 05:29:19,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:29:19,158 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] [2023-11-29 05:29:19,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-11-29 05:29:19,158 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-29 05:29:19,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:29:19,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1013659810, now seen corresponding path program 1 times [2023-11-29 05:29:19,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:29:19,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205011816] [2023-11-29 05:29:19,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:29:19,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:29:19,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:29:19,346 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 05:29:19,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:29:19,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205011816] [2023-11-29 05:29:19,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205011816] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:29:19,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:29:19,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 05:29:19,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812135391] [2023-11-29 05:29:19,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:29:19,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 05:29:19,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:29:19,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 05:29:19,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 05:29:19,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 127 [2023-11-29 05:29:19,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 140 transitions, 1448 flow. Second operand has 4 states, 4 states have (on average 80.0) internal successors, (320), 4 states have internal predecessors, (320), 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 05:29:19,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:29:19,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 127 [2023-11-29 05:29:19,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:29:22,096 INFO L124 PetriNetUnfolderBase]: 11766/21297 cut-off events. [2023-11-29 05:29:22,096 INFO L125 PetriNetUnfolderBase]: For 66493/66520 co-relation queries the response was YES. [2023-11-29 05:29:22,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53648 conditions, 21297 events. 11766/21297 cut-off events. For 66493/66520 co-relation queries the response was YES. Maximal size of possible extension queue 782. Compared 179361 event pairs, 3583 based on Foata normal form. 24/18938 useless extension candidates. Maximal degree in co-relation 53610. Up to 7521 conditions per place. [2023-11-29 05:29:22,309 INFO L140 encePairwiseOnDemand]: 119/127 looper letters, 117 selfloop transitions, 25 changer transitions 0/198 dead transitions. [2023-11-29 05:29:22,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 198 transitions, 1917 flow [2023-11-29 05:29:22,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 05:29:22,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 05:29:22,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 403 transitions. [2023-11-29 05:29:22,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7933070866141733 [2023-11-29 05:29:22,311 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 403 transitions. [2023-11-29 05:29:22,311 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 403 transitions. [2023-11-29 05:29:22,312 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:29:22,312 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 403 transitions. [2023-11-29 05:29:22,313 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 100.75) internal successors, (403), 4 states have internal predecessors, (403), 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 05:29:22,314 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 127.0) internal successors, (635), 5 states have internal predecessors, (635), 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 05:29:22,314 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 127.0) internal successors, (635), 5 states have internal predecessors, (635), 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 05:29:22,314 INFO L175 Difference]: Start difference. First operand has 139 places, 140 transitions, 1448 flow. Second operand 4 states and 403 transitions. [2023-11-29 05:29:22,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 198 transitions, 1917 flow [2023-11-29 05:29:22,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 198 transitions, 1826 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-29 05:29:22,623 INFO L231 Difference]: Finished difference. Result has 138 places, 144 transitions, 1496 flow [2023-11-29 05:29:22,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=127, PETRI_DIFFERENCE_MINUEND_FLOW=1361, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1496, PETRI_PLACES=138, PETRI_TRANSITIONS=144} [2023-11-29 05:29:22,624 INFO L281 CegarLoopForPetriNet]: 117 programPoint places, 21 predicate places. [2023-11-29 05:29:22,624 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 144 transitions, 1496 flow [2023-11-29 05:29:22,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 80.0) internal successors, (320), 4 states have internal predecessors, (320), 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 05:29:22,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:29:22,624 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] [2023-11-29 05:29:22,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-11-29 05:29:22,625 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-29 05:29:22,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:29:22,625 INFO L85 PathProgramCache]: Analyzing trace with hash 421395030, now seen corresponding path program 2 times [2023-11-29 05:29:22,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:29:22,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34127443] [2023-11-29 05:29:22,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:29:22,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:29:22,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:29:22,898 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 05:29:22,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:29:22,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34127443] [2023-11-29 05:29:22,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34127443] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:29:22,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:29:22,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 05:29:22,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793654292] [2023-11-29 05:29:22,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:29:22,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 05:29:22,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:29:22,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 05:29:22,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-29 05:29:23,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 127 [2023-11-29 05:29:23,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 144 transitions, 1496 flow. Second operand has 6 states, 6 states have (on average 71.0) internal successors, (426), 6 states have internal predecessors, (426), 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 05:29:23,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:29:23,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 127 [2023-11-29 05:29:23,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:29:26,800 INFO L124 PetriNetUnfolderBase]: 17573/29280 cut-off events. [2023-11-29 05:29:26,800 INFO L125 PetriNetUnfolderBase]: For 76797/76830 co-relation queries the response was YES. [2023-11-29 05:29:26,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74067 conditions, 29280 events. 17573/29280 cut-off events. For 76797/76830 co-relation queries the response was YES. Maximal size of possible extension queue 1059. Compared 236195 event pairs, 4721 based on Foata normal form. 24/26345 useless extension candidates. Maximal degree in co-relation 74028. Up to 19094 conditions per place. [2023-11-29 05:29:27,093 INFO L140 encePairwiseOnDemand]: 118/127 looper letters, 111 selfloop transitions, 43 changer transitions 0/200 dead transitions. [2023-11-29 05:29:27,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 200 transitions, 1964 flow [2023-11-29 05:29:27,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 05:29:27,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 05:29:27,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 515 transitions. [2023-11-29 05:29:27,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6758530183727034 [2023-11-29 05:29:27,095 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 515 transitions. [2023-11-29 05:29:27,095 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 515 transitions. [2023-11-29 05:29:27,095 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:29:27,095 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 515 transitions. [2023-11-29 05:29:27,097 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 85.83333333333333) internal successors, (515), 6 states have internal predecessors, (515), 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 05:29:27,098 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 127.0) internal successors, (889), 7 states have internal predecessors, (889), 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 05:29:27,098 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 127.0) internal successors, (889), 7 states have internal predecessors, (889), 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 05:29:27,098 INFO L175 Difference]: Start difference. First operand has 138 places, 144 transitions, 1496 flow. Second operand 6 states and 515 transitions. [2023-11-29 05:29:27,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 200 transitions, 1964 flow [2023-11-29 05:29:27,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 200 transitions, 1937 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 05:29:27,455 INFO L231 Difference]: Finished difference. Result has 139 places, 142 transitions, 1543 flow [2023-11-29 05:29:27,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=127, PETRI_DIFFERENCE_MINUEND_FLOW=1457, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1543, PETRI_PLACES=139, PETRI_TRANSITIONS=142} [2023-11-29 05:29:27,455 INFO L281 CegarLoopForPetriNet]: 117 programPoint places, 22 predicate places. [2023-11-29 05:29:27,455 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 142 transitions, 1543 flow [2023-11-29 05:29:27,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 71.0) internal successors, (426), 6 states have internal predecessors, (426), 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 05:29:27,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:29:27,456 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] [2023-11-29 05:29:27,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-11-29 05:29:27,456 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-29 05:29:27,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:29:27,457 INFO L85 PathProgramCache]: Analyzing trace with hash 628337277, now seen corresponding path program 1 times [2023-11-29 05:29:27,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:29:27,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248066591] [2023-11-29 05:29:27,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:29:27,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:29:27,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:29:27,747 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 05:29:27,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:29:27,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248066591] [2023-11-29 05:29:27,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248066591] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:29:27,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:29:27,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 05:29:27,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808933938] [2023-11-29 05:29:27,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:29:27,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 05:29:27,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:29:27,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 05:29:27,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-11-29 05:29:27,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 127 [2023-11-29 05:29:27,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 142 transitions, 1543 flow. Second operand has 6 states, 6 states have (on average 80.16666666666667) internal successors, (481), 6 states have internal predecessors, (481), 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 05:29:27,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:29:27,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 127 [2023-11-29 05:29:27,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:29:31,607 INFO L124 PetriNetUnfolderBase]: 15815/28175 cut-off events. [2023-11-29 05:29:31,607 INFO L125 PetriNetUnfolderBase]: For 82294/82296 co-relation queries the response was YES. [2023-11-29 05:29:31,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70572 conditions, 28175 events. 15815/28175 cut-off events. For 82294/82296 co-relation queries the response was YES. Maximal size of possible extension queue 1040. Compared 243080 event pairs, 4694 based on Foata normal form. 1/25135 useless extension candidates. Maximal degree in co-relation 70533. Up to 16450 conditions per place. [2023-11-29 05:29:31,877 INFO L140 encePairwiseOnDemand]: 121/127 looper letters, 71 selfloop transitions, 44 changer transitions 0/176 dead transitions. [2023-11-29 05:29:31,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 176 transitions, 1879 flow [2023-11-29 05:29:31,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 05:29:31,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 05:29:31,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 526 transitions. [2023-11-29 05:29:31,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6902887139107612 [2023-11-29 05:29:31,879 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 526 transitions. [2023-11-29 05:29:31,879 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 526 transitions. [2023-11-29 05:29:31,880 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:29:31,880 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 526 transitions. [2023-11-29 05:29:31,881 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 87.66666666666667) internal successors, (526), 6 states have internal predecessors, (526), 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 05:29:31,883 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 127.0) internal successors, (889), 7 states have internal predecessors, (889), 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 05:29:31,883 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 127.0) internal successors, (889), 7 states have internal predecessors, (889), 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 05:29:31,883 INFO L175 Difference]: Start difference. First operand has 139 places, 142 transitions, 1543 flow. Second operand 6 states and 526 transitions. [2023-11-29 05:29:31,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 176 transitions, 1879 flow [2023-11-29 05:29:32,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 176 transitions, 1813 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-29 05:29:32,289 INFO L231 Difference]: Finished difference. Result has 139 places, 141 transitions, 1557 flow [2023-11-29 05:29:32,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=127, PETRI_DIFFERENCE_MINUEND_FLOW=1469, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1557, PETRI_PLACES=139, PETRI_TRANSITIONS=141} [2023-11-29 05:29:32,290 INFO L281 CegarLoopForPetriNet]: 117 programPoint places, 22 predicate places. [2023-11-29 05:29:32,290 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 141 transitions, 1557 flow [2023-11-29 05:29:32,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 80.16666666666667) internal successors, (481), 6 states have internal predecessors, (481), 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 05:29:32,290 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:29:32,290 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] [2023-11-29 05:29:32,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-11-29 05:29:32,291 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-29 05:29:32,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:29:32,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1699701892, now seen corresponding path program 1 times [2023-11-29 05:29:32,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:29:32,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35633348] [2023-11-29 05:29:32,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:29:32,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:29:32,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:29:32,574 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 05:29:32,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:29:32,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35633348] [2023-11-29 05:29:32,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35633348] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:29:32,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:29:32,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 05:29:32,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480725117] [2023-11-29 05:29:32,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:29:32,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 05:29:32,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:29:32,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 05:29:32,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-29 05:29:32,718 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 127 [2023-11-29 05:29:32,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 141 transitions, 1557 flow. Second operand has 6 states, 6 states have (on average 80.33333333333333) internal successors, (482), 6 states have internal predecessors, (482), 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 05:29:32,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:29:32,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 127 [2023-11-29 05:29:32,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:29:35,248 INFO L124 PetriNetUnfolderBase]: 11021/20316 cut-off events. [2023-11-29 05:29:35,248 INFO L125 PetriNetUnfolderBase]: For 73047/73067 co-relation queries the response was YES. [2023-11-29 05:29:35,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51947 conditions, 20316 events. 11021/20316 cut-off events. For 73047/73067 co-relation queries the response was YES. Maximal size of possible extension queue 744. Compared 173093 event pairs, 3506 based on Foata normal form. 4/18019 useless extension candidates. Maximal degree in co-relation 51907. Up to 10550 conditions per place. [2023-11-29 05:29:35,418 INFO L140 encePairwiseOnDemand]: 121/127 looper letters, 69 selfloop transitions, 44 changer transitions 0/173 dead transitions. [2023-11-29 05:29:35,419 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 173 transitions, 1876 flow [2023-11-29 05:29:35,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 05:29:35,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 05:29:35,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 525 transitions. [2023-11-29 05:29:35,420 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6889763779527559 [2023-11-29 05:29:35,421 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 525 transitions. [2023-11-29 05:29:35,421 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 525 transitions. [2023-11-29 05:29:35,421 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:29:35,421 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 525 transitions. [2023-11-29 05:29:35,422 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 87.5) internal successors, (525), 6 states have internal predecessors, (525), 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 05:29:35,423 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 127.0) internal successors, (889), 7 states have internal predecessors, (889), 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 05:29:35,423 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 127.0) internal successors, (889), 7 states have internal predecessors, (889), 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 05:29:35,423 INFO L175 Difference]: Start difference. First operand has 139 places, 141 transitions, 1557 flow. Second operand 6 states and 525 transitions. [2023-11-29 05:29:35,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 173 transitions, 1876 flow [2023-11-29 05:29:35,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 173 transitions, 1826 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-29 05:29:35,664 INFO L231 Difference]: Finished difference. Result has 139 places, 140 transitions, 1589 flow [2023-11-29 05:29:35,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=127, PETRI_DIFFERENCE_MINUEND_FLOW=1501, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1589, PETRI_PLACES=139, PETRI_TRANSITIONS=140} [2023-11-29 05:29:35,664 INFO L281 CegarLoopForPetriNet]: 117 programPoint places, 22 predicate places. [2023-11-29 05:29:35,665 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 140 transitions, 1589 flow [2023-11-29 05:29:35,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 80.33333333333333) internal successors, (482), 6 states have internal predecessors, (482), 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 05:29:35,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:29:35,665 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] [2023-11-29 05:29:35,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-11-29 05:29:35,665 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-29 05:29:35,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:29:35,666 INFO L85 PathProgramCache]: Analyzing trace with hash 1548847318, now seen corresponding path program 1 times [2023-11-29 05:29:35,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:29:35,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463725526] [2023-11-29 05:29:35,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:29:35,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:29:35,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:29:36,599 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 05:29:36,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:29:36,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463725526] [2023-11-29 05:29:36,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463725526] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:29:36,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:29:36,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2023-11-29 05:29:36,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950019914] [2023-11-29 05:29:36,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:29:36,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-29 05:29:36,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:29:36,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-29 05:29:36,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2023-11-29 05:29:36,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 127 [2023-11-29 05:29:36,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 140 transitions, 1589 flow. Second operand has 21 states, 21 states have (on average 65.28571428571429) internal successors, (1371), 21 states have internal predecessors, (1371), 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 05:29:36,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:29:36,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 127 [2023-11-29 05:29:36,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:30:01,359 INFO L124 PetriNetUnfolderBase]: 131989/184650 cut-off events. [2023-11-29 05:30:01,359 INFO L125 PetriNetUnfolderBase]: For 287835/287879 co-relation queries the response was YES. [2023-11-29 05:30:02,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 426502 conditions, 184650 events. 131989/184650 cut-off events. For 287835/287879 co-relation queries the response was YES. Maximal size of possible extension queue 3255. Compared 1260824 event pairs, 42418 based on Foata normal form. 5/178336 useless extension candidates. Maximal degree in co-relation 426461. Up to 127829 conditions per place. [2023-11-29 05:30:02,856 INFO L140 encePairwiseOnDemand]: 107/127 looper letters, 476 selfloop transitions, 107 changer transitions 50/682 dead transitions. [2023-11-29 05:30:02,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 682 transitions, 5434 flow [2023-11-29 05:30:02,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-11-29 05:30:02,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-11-29 05:30:02,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 3025 transitions. [2023-11-29 05:30:02,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6107409650716737 [2023-11-29 05:30:02,864 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 3025 transitions. [2023-11-29 05:30:02,864 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 3025 transitions. [2023-11-29 05:30:02,866 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:30:02,866 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 3025 transitions. [2023-11-29 05:30:02,873 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 77.56410256410257) internal successors, (3025), 39 states have internal predecessors, (3025), 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 05:30:02,881 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 127.0) internal successors, (5080), 40 states have internal predecessors, (5080), 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 05:30:02,882 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 127.0) internal successors, (5080), 40 states have internal predecessors, (5080), 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 05:30:02,882 INFO L175 Difference]: Start difference. First operand has 139 places, 140 transitions, 1589 flow. Second operand 39 states and 3025 transitions. [2023-11-29 05:30:02,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 682 transitions, 5434 flow [2023-11-29 05:30:04,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 682 transitions, 5236 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-11-29 05:30:04,236 INFO L231 Difference]: Finished difference. Result has 187 places, 255 transitions, 2232 flow [2023-11-29 05:30:04,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=127, PETRI_DIFFERENCE_MINUEND_FLOW=1501, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=2232, PETRI_PLACES=187, PETRI_TRANSITIONS=255} [2023-11-29 05:30:04,236 INFO L281 CegarLoopForPetriNet]: 117 programPoint places, 70 predicate places. [2023-11-29 05:30:04,236 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 255 transitions, 2232 flow [2023-11-29 05:30:04,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 65.28571428571429) internal successors, (1371), 21 states have internal predecessors, (1371), 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 05:30:04,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:30:04,237 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] [2023-11-29 05:30:04,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-11-29 05:30:04,237 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-29 05:30:04,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:30:04,238 INFO L85 PathProgramCache]: Analyzing trace with hash -1227545932, now seen corresponding path program 2 times [2023-11-29 05:30:04,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:30:04,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833908260] [2023-11-29 05:30:04,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:30:04,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:30:04,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:30:04,862 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 05:30:04,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:30:04,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833908260] [2023-11-29 05:30:04,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833908260] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:30:04,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:30:04,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2023-11-29 05:30:04,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892588233] [2023-11-29 05:30:04,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:30:04,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-29 05:30:04,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:30:04,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-29 05:30:04,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2023-11-29 05:30:05,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 127 [2023-11-29 05:30:05,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 255 transitions, 2232 flow. Second operand has 19 states, 19 states have (on average 65.52631578947368) internal successors, (1245), 19 states have internal predecessors, (1245), 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 05:30:05,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:30:05,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 127 [2023-11-29 05:30:05,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:30:51,586 INFO L124 PetriNetUnfolderBase]: 203165/280733 cut-off events. [2023-11-29 05:30:51,586 INFO L125 PetriNetUnfolderBase]: For 638558/638691 co-relation queries the response was YES. [2023-11-29 05:30:53,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 800884 conditions, 280733 events. 203165/280733 cut-off events. For 638558/638691 co-relation queries the response was YES. Maximal size of possible extension queue 4215. Compared 1955360 event pairs, 46232 based on Foata normal form. 21/269633 useless extension candidates. Maximal degree in co-relation 800828. Up to 178569 conditions per place. [2023-11-29 05:30:55,128 INFO L140 encePairwiseOnDemand]: 109/127 looper letters, 739 selfloop transitions, 228 changer transitions 60/1076 dead transitions. [2023-11-29 05:30:55,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 1076 transitions, 9507 flow [2023-11-29 05:30:55,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2023-11-29 05:30:55,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2023-11-29 05:30:55,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 4607 transitions. [2023-11-29 05:30:55,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5946818123144443 [2023-11-29 05:30:55,135 INFO L72 ComplementDD]: Start complementDD. Operand 61 states and 4607 transitions. [2023-11-29 05:30:55,135 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 4607 transitions. [2023-11-29 05:30:55,136 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:30:55,136 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 61 states and 4607 transitions. [2023-11-29 05:30:55,142 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 62 states, 61 states have (on average 75.52459016393442) internal successors, (4607), 61 states have internal predecessors, (4607), 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 05:30:55,151 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 62 states, 62 states have (on average 127.0) internal successors, (7874), 62 states have internal predecessors, (7874), 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 05:30:55,152 INFO L81 ComplementDD]: Finished complementDD. Result has 62 states, 62 states have (on average 127.0) internal successors, (7874), 62 states have internal predecessors, (7874), 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 05:30:55,152 INFO L175 Difference]: Start difference. First operand has 187 places, 255 transitions, 2232 flow. Second operand 61 states and 4607 transitions. [2023-11-29 05:30:55,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 1076 transitions, 9507 flow [2023-11-29 05:31:00,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 1076 transitions, 9507 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-29 05:31:00,989 INFO L231 Difference]: Finished difference. Result has 278 places, 495 transitions, 4174 flow [2023-11-29 05:31:00,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=127, PETRI_DIFFERENCE_MINUEND_FLOW=2232, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=4174, PETRI_PLACES=278, PETRI_TRANSITIONS=495} [2023-11-29 05:31:00,991 INFO L281 CegarLoopForPetriNet]: 117 programPoint places, 161 predicate places. [2023-11-29 05:31:00,991 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 495 transitions, 4174 flow [2023-11-29 05:31:00,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 65.52631578947368) internal successors, (1245), 19 states have internal predecessors, (1245), 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 05:31:00,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:31:00,991 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] [2023-11-29 05:31:00,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-11-29 05:31:00,991 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-29 05:31:00,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:31:00,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1438393656, now seen corresponding path program 3 times [2023-11-29 05:31:00,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:31:00,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994492185] [2023-11-29 05:31:00,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:31:00,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:31:01,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:31:01,939 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 05:31:01,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:31:01,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994492185] [2023-11-29 05:31:01,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994492185] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:31:01,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:31:01,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2023-11-29 05:31:01,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513398278] [2023-11-29 05:31:01,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:31:01,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-29 05:31:01,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:31:01,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-29 05:31:01,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=375, Unknown=0, NotChecked=0, Total=420 [2023-11-29 05:31:02,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 127 [2023-11-29 05:31:02,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 495 transitions, 4174 flow. Second operand has 21 states, 21 states have (on average 65.28571428571429) internal successors, (1371), 21 states have internal predecessors, (1371), 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 05:31:02,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:31:02,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 127 [2023-11-29 05:31:02,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:32:26,814 INFO L124 PetriNetUnfolderBase]: 285732/391185 cut-off events. [2023-11-29 05:32:26,814 INFO L125 PetriNetUnfolderBase]: For 2347206/2347767 co-relation queries the response was YES. [2023-11-29 05:32:31,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1453053 conditions, 391185 events. 285732/391185 cut-off events. For 2347206/2347767 co-relation queries the response was YES. Maximal size of possible extension queue 6225. Compared 2780142 event pairs, 62931 based on Foata normal form. 71/375749 useless extension candidates. Maximal degree in co-relation 1452964. Up to 256553 conditions per place. [2023-11-29 05:32:33,402 INFO L140 encePairwiseOnDemand]: 107/127 looper letters, 1197 selfloop transitions, 457 changer transitions 61/1764 dead transitions. [2023-11-29 05:32:33,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 1764 transitions, 17176 flow [2023-11-29 05:32:33,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2023-11-29 05:32:33,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2023-11-29 05:32:33,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 6865 transitions. [2023-11-29 05:32:33,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5940122869256728 [2023-11-29 05:32:33,412 INFO L72 ComplementDD]: Start complementDD. Operand 91 states and 6865 transitions. [2023-11-29 05:32:33,412 INFO L73 IsDeterministic]: Start isDeterministic. Operand 91 states and 6865 transitions. [2023-11-29 05:32:33,414 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:32:33,414 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 91 states and 6865 transitions. [2023-11-29 05:32:33,423 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 92 states, 91 states have (on average 75.43956043956044) internal successors, (6865), 91 states have internal predecessors, (6865), 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 05:32:33,435 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 92 states, 92 states have (on average 127.0) internal successors, (11684), 92 states have internal predecessors, (11684), 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 05:32:33,437 INFO L81 ComplementDD]: Finished complementDD. Result has 92 states, 92 states have (on average 127.0) internal successors, (11684), 92 states have internal predecessors, (11684), 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 05:32:33,437 INFO L175 Difference]: Start difference. First operand has 278 places, 495 transitions, 4174 flow. Second operand 91 states and 6865 transitions. [2023-11-29 05:32:33,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 1764 transitions, 17176 flow [2023-11-29 05:39:12,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 1764 transitions, 16586 flow, removed 295 selfloop flow, removed 2 redundant places. [2023-11-29 05:39:12,967 INFO L231 Difference]: Finished difference. Result has 397 places, 908 transitions, 9134 flow [2023-11-29 05:39:12,968 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=127, PETRI_DIFFERENCE_MINUEND_FLOW=3808, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=495, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=91, PETRI_FLOW=9134, PETRI_PLACES=397, PETRI_TRANSITIONS=908} [2023-11-29 05:39:12,969 INFO L281 CegarLoopForPetriNet]: 117 programPoint places, 280 predicate places. [2023-11-29 05:39:12,969 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 908 transitions, 9134 flow [2023-11-29 05:39:12,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 65.28571428571429) internal successors, (1371), 21 states have internal predecessors, (1371), 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 05:39:12,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:39:12,969 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] [2023-11-29 05:39:12,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2023-11-29 05:39:12,970 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-29 05:39:12,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:39:12,970 INFO L85 PathProgramCache]: Analyzing trace with hash 348660316, now seen corresponding path program 4 times [2023-11-29 05:39:12,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:39:12,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045983736] [2023-11-29 05:39:12,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:39:12,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:39:13,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:39:13,803 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 05:39:13,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:39:13,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045983736] [2023-11-29 05:39:13,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045983736] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:39:13,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:39:13,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2023-11-29 05:39:13,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148776237] [2023-11-29 05:39:13,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:39:13,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 05:39:13,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:39:13,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 05:39:13,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2023-11-29 05:39:13,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 127 [2023-11-29 05:39:13,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 908 transitions, 9134 flow. Second operand has 20 states, 20 states have (on average 65.4) internal successors, (1308), 20 states have internal predecessors, (1308), 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 05:39:13,869 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:39:13,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 127 [2023-11-29 05:39:13,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand