./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread-lit/sssc12_variant-pthread.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77ef0c9-e847-4bf5-96e1-2283db9f82b9/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77ef0c9-e847-4bf5-96e1-2283db9f82b9/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_e77ef0c9-e847-4bf5-96e1-2283db9f82b9/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77ef0c9-e847-4bf5-96e1-2283db9f82b9/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-lit/sssc12_variant-pthread.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77ef0c9-e847-4bf5-96e1-2283db9f82b9/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_e77ef0c9-e847-4bf5-96e1-2283db9f82b9/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 0ff08c0361e0fdb1af5d85b333c023f31932563eeba591605f3b3b9ddd16afc8 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 01:54:03,346 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 01:54:03,408 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77ef0c9-e847-4bf5-96e1-2283db9f82b9/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-29 01:54:03,413 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 01:54:03,414 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 01:54:03,438 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 01:54:03,439 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 01:54:03,439 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 01:54:03,440 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 01:54:03,440 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 01:54:03,441 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 01:54:03,442 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 01:54:03,442 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 01:54:03,443 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 01:54:03,443 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 01:54:03,444 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 01:54:03,444 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 01:54:03,445 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 01:54:03,445 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 01:54:03,446 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 01:54:03,446 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-29 01:54:03,447 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-29 01:54:03,447 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-29 01:54:03,448 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 01:54:03,448 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-29 01:54:03,449 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-29 01:54:03,449 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 01:54:03,450 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 01:54:03,450 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 01:54:03,451 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 01:54:03,451 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 01:54:03,451 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 01:54:03,452 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 01:54:03,452 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 01:54:03,453 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 01:54:03,453 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 01:54:03,453 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 01:54:03,453 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 01:54:03,454 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 01:54:03,454 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 01:54:03,454 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 01:54:03,454 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_e77ef0c9-e847-4bf5-96e1-2283db9f82b9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77ef0c9-e847-4bf5-96e1-2283db9f82b9/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0ff08c0361e0fdb1af5d85b333c023f31932563eeba591605f3b3b9ddd16afc8 [2023-11-29 01:54:03,689 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 01:54:03,710 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 01:54:03,712 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 01:54:03,713 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 01:54:03,714 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 01:54:03,715 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77ef0c9-e847-4bf5-96e1-2283db9f82b9/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/pthread-lit/sssc12_variant-pthread.i [2023-11-29 01:54:06,493 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 01:54:06,732 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 01:54:06,733 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77ef0c9-e847-4bf5-96e1-2283db9f82b9/sv-benchmarks/c/pthread-lit/sssc12_variant-pthread.i [2023-11-29 01:54:06,751 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77ef0c9-e847-4bf5-96e1-2283db9f82b9/bin/uautomizer-verify-BQ2R08f2Ya/data/ee32a3fc1/af629d0ae2fa4510989d394ef3d9c763/FLAGd3dba4081 [2023-11-29 01:54:06,765 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77ef0c9-e847-4bf5-96e1-2283db9f82b9/bin/uautomizer-verify-BQ2R08f2Ya/data/ee32a3fc1/af629d0ae2fa4510989d394ef3d9c763 [2023-11-29 01:54:06,768 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 01:54:06,769 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 01:54:06,771 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 01:54:06,771 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 01:54:06,776 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 01:54:06,777 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 01:54:06" (1/1) ... [2023-11-29 01:54:06,778 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@659b107b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:54:06, skipping insertion in model container [2023-11-29 01:54:06,778 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 01:54:06" (1/1) ... [2023-11-29 01:54:06,831 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 01:54:07,280 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 01:54:07,295 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 01:54:07,344 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 01:54:07,413 INFO L206 MainTranslator]: Completed translation [2023-11-29 01:54:07,413 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:54:07 WrapperNode [2023-11-29 01:54:07,413 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 01:54:07,414 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 01:54:07,415 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 01:54:07,415 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 01:54:07,423 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:54:07" (1/1) ... [2023-11-29 01:54:07,442 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:54:07" (1/1) ... [2023-11-29 01:54:07,468 INFO L138 Inliner]: procedures = 273, calls = 26, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 84 [2023-11-29 01:54:07,469 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 01:54:07,469 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 01:54:07,470 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 01:54:07,470 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 01:54:07,482 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:54:07" (1/1) ... [2023-11-29 01:54:07,482 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:54:07" (1/1) ... [2023-11-29 01:54:07,486 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:54:07" (1/1) ... [2023-11-29 01:54:07,502 INFO L175 MemorySlicer]: Split 11 memory accesses to 4 slices as follows [3, 2, 5, 1]. 45 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [0, 2, 5, 0]. The 3 writes are split as follows [2, 0, 0, 1]. [2023-11-29 01:54:07,502 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:54:07" (1/1) ... [2023-11-29 01:54:07,503 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:54:07" (1/1) ... [2023-11-29 01:54:07,510 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:54:07" (1/1) ... [2023-11-29 01:54:07,514 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:54:07" (1/1) ... [2023-11-29 01:54:07,516 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:54:07" (1/1) ... [2023-11-29 01:54:07,518 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:54:07" (1/1) ... [2023-11-29 01:54:07,522 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 01:54:07,523 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 01:54:07,523 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 01:54:07,524 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 01:54:07,525 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:54:07" (1/1) ... [2023-11-29 01:54:07,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 01:54:07,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77ef0c9-e847-4bf5-96e1-2283db9f82b9/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:54:07,559 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77ef0c9-e847-4bf5-96e1-2283db9f82b9/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 01:54:07,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e77ef0c9-e847-4bf5-96e1-2283db9f82b9/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 01:54:07,593 INFO L130 BoogieDeclarations]: Found specification of procedure thr [2023-11-29 01:54:07,594 INFO L138 BoogieDeclarations]: Found implementation of procedure thr [2023-11-29 01:54:07,594 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 01:54:07,594 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 01:54:07,594 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-29 01:54:07,594 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 01:54:07,594 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 01:54:07,595 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-29 01:54:07,595 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-29 01:54:07,595 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 01:54:07,595 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 01:54:07,595 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 01:54:07,595 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-29 01:54:07,596 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-29 01:54:07,596 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-29 01:54:07,596 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 01:54:07,596 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 01:54:07,597 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 01:54:07,597 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 01:54:07,597 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-29 01:54:07,597 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 01:54:07,598 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 01:54:07,599 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 01:54:07,727 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 01:54:07,729 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 01:54:07,905 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 01:54:08,075 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 01:54:08,076 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-29 01:54:08,076 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 01:54:08 BoogieIcfgContainer [2023-11-29 01:54:08,076 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 01:54:08,080 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 01:54:08,080 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 01:54:08,083 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 01:54:08,083 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 01:54:06" (1/3) ... [2023-11-29 01:54:08,084 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fb363f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 01:54:08, skipping insertion in model container [2023-11-29 01:54:08,084 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:54:07" (2/3) ... [2023-11-29 01:54:08,085 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fb363f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 01:54:08, skipping insertion in model container [2023-11-29 01:54:08,085 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 01:54:08" (3/3) ... [2023-11-29 01:54:08,086 INFO L112 eAbstractionObserver]: Analyzing ICFG sssc12_variant-pthread.i [2023-11-29 01:54:08,106 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 01:54:08,106 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2023-11-29 01:54:08,106 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-29 01:54:08,149 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-29 01:54:08,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 35 places, 35 transitions, 74 flow [2023-11-29 01:54:08,214 INFO L124 PetriNetUnfolderBase]: 3/42 cut-off events. [2023-11-29 01:54:08,214 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 01:54:08,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46 conditions, 42 events. 3/42 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 82 event pairs, 0 based on Foata normal form. 0/24 useless extension candidates. Maximal degree in co-relation 32. Up to 2 conditions per place. [2023-11-29 01:54:08,217 INFO L82 GeneralOperation]: Start removeDead. Operand has 35 places, 35 transitions, 74 flow [2023-11-29 01:54:08,221 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 35 places, 35 transitions, 74 flow [2023-11-29 01:54:08,233 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 01:54:08,240 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;@4f1e3197, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 01:54:08,240 INFO L358 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2023-11-29 01:54:08,244 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 01:54:08,244 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-11-29 01:54:08,245 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 01:54:08,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:54:08,246 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-29 01:54:08,246 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 15 more)] === [2023-11-29 01:54:08,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:54:08,252 INFO L85 PathProgramCache]: Analyzing trace with hash 275204, now seen corresponding path program 1 times [2023-11-29 01:54:08,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:54:08,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531379566] [2023-11-29 01:54:08,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:54:08,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:54:08,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:54:08,585 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 01:54:08,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:54:08,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531379566] [2023-11-29 01:54:08,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531379566] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:54:08,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:54:08,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 01:54:08,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28300657] [2023-11-29 01:54:08,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:54:08,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:54:08,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:54:08,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:54:08,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:54:08,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 35 [2023-11-29 01:54:08,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 35 transitions, 74 flow. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 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 01:54:08,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:54:08,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 35 [2023-11-29 01:54:08,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:54:08,732 INFO L124 PetriNetUnfolderBase]: 25/117 cut-off events. [2023-11-29 01:54:08,732 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 01:54:08,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 182 conditions, 117 events. 25/117 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 435 event pairs, 21 based on Foata normal form. 8/105 useless extension candidates. Maximal degree in co-relation 166. Up to 60 conditions per place. [2023-11-29 01:54:08,736 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 12 selfloop transitions, 1 changer transitions 0/28 dead transitions. [2023-11-29 01:54:08,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 28 transitions, 86 flow [2023-11-29 01:54:08,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:54:08,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 01:54:08,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 65 transitions. [2023-11-29 01:54:08,750 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2023-11-29 01:54:08,751 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 65 transitions. [2023-11-29 01:54:08,751 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 65 transitions. [2023-11-29 01:54:08,752 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:54:08,755 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 65 transitions. [2023-11-29 01:54:08,757 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 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 01:54:08,761 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:54:08,761 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:54:08,763 INFO L175 Difference]: Start difference. First operand has 35 places, 35 transitions, 74 flow. Second operand 3 states and 65 transitions. [2023-11-29 01:54:08,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 28 transitions, 86 flow [2023-11-29 01:54:08,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 28 transitions, 86 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-29 01:54:08,769 INFO L231 Difference]: Finished difference. Result has 32 places, 28 transitions, 62 flow [2023-11-29 01:54:08,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=62, PETRI_PLACES=32, PETRI_TRANSITIONS=28} [2023-11-29 01:54:08,775 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, -3 predicate places. [2023-11-29 01:54:08,775 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 28 transitions, 62 flow [2023-11-29 01:54:08,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 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 01:54:08,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:54:08,776 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-29 01:54:08,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 01:54:08,777 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 15 more)] === [2023-11-29 01:54:08,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:54:08,777 INFO L85 PathProgramCache]: Analyzing trace with hash 275205, now seen corresponding path program 1 times [2023-11-29 01:54:08,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:54:08,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883686188] [2023-11-29 01:54:08,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:54:08,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:54:08,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:54:08,902 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 01:54:08,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:54:08,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883686188] [2023-11-29 01:54:08,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883686188] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:54:08,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:54:08,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 01:54:08,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331303406] [2023-11-29 01:54:08,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:54:08,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:54:08,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:54:08,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:54:08,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:54:08,924 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 35 [2023-11-29 01:54:08,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 28 transitions, 62 flow. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 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 01:54:08,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:54:08,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 35 [2023-11-29 01:54:08,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:54:08,966 INFO L124 PetriNetUnfolderBase]: 17/87 cut-off events. [2023-11-29 01:54:08,966 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-29 01:54:08,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137 conditions, 87 events. 17/87 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 273 event pairs, 14 based on Foata normal form. 9/81 useless extension candidates. Maximal degree in co-relation 130. Up to 43 conditions per place. [2023-11-29 01:54:08,968 INFO L140 encePairwiseOnDemand]: 33/35 looper letters, 11 selfloop transitions, 1 changer transitions 0/27 dead transitions. [2023-11-29 01:54:08,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 27 transitions, 84 flow [2023-11-29 01:54:08,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:54:08,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 01:54:08,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 64 transitions. [2023-11-29 01:54:08,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6095238095238096 [2023-11-29 01:54:08,970 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 64 transitions. [2023-11-29 01:54:08,970 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 64 transitions. [2023-11-29 01:54:08,970 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:54:08,970 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 64 transitions. [2023-11-29 01:54:08,971 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 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 01:54:08,972 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:54:08,972 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:54:08,972 INFO L175 Difference]: Start difference. First operand has 32 places, 28 transitions, 62 flow. Second operand 3 states and 64 transitions. [2023-11-29 01:54:08,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 27 transitions, 84 flow [2023-11-29 01:54:08,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 27 transitions, 83 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 01:54:08,974 INFO L231 Difference]: Finished difference. Result has 32 places, 27 transitions, 61 flow [2023-11-29 01:54:08,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=59, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=61, PETRI_PLACES=32, PETRI_TRANSITIONS=27} [2023-11-29 01:54:08,975 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, -3 predicate places. [2023-11-29 01:54:08,976 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 27 transitions, 61 flow [2023-11-29 01:54:08,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 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 01:54:08,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:54:08,976 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1] [2023-11-29 01:54:08,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 01:54:08,977 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 15 more)] === [2023-11-29 01:54:08,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:54:08,977 INFO L85 PathProgramCache]: Analyzing trace with hash 2122836796, now seen corresponding path program 1 times [2023-11-29 01:54:08,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:54:08,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283339097] [2023-11-29 01:54:08,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:54:08,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:54:08,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 01:54:08,999 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-29 01:54:09,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 01:54:09,030 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-29 01:54:09,030 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-29 01:54:09,031 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (17 of 18 remaining) [2023-11-29 01:54:09,033 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 18 remaining) [2023-11-29 01:54:09,034 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 18 remaining) [2023-11-29 01:54:09,034 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (14 of 18 remaining) [2023-11-29 01:54:09,034 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 18 remaining) [2023-11-29 01:54:09,035 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 18 remaining) [2023-11-29 01:54:09,035 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 18 remaining) [2023-11-29 01:54:09,035 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 18 remaining) [2023-11-29 01:54:09,035 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 18 remaining) [2023-11-29 01:54:09,036 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 18 remaining) [2023-11-29 01:54:09,036 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr6ASSERT_VIOLATIONMEMORY_LEAK (7 of 18 remaining) [2023-11-29 01:54:09,036 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 18 remaining) [2023-11-29 01:54:09,036 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 18 remaining) [2023-11-29 01:54:09,036 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 18 remaining) [2023-11-29 01:54:09,037 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 18 remaining) [2023-11-29 01:54:09,037 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 18 remaining) [2023-11-29 01:54:09,037 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 18 remaining) [2023-11-29 01:54:09,038 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr6ASSERT_VIOLATIONMEMORY_LEAK (0 of 18 remaining) [2023-11-29 01:54:09,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-29 01:54:09,038 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-29 01:54:09,041 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-29 01:54:09,041 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-29 01:54:09,073 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-29 01:54:09,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 59 places, 60 transitions, 130 flow [2023-11-29 01:54:09,090 INFO L124 PetriNetUnfolderBase]: 6/75 cut-off events. [2023-11-29 01:54:09,090 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-29 01:54:09,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83 conditions, 75 events. 6/75 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 213 event pairs, 0 based on Foata normal form. 0/43 useless extension candidates. Maximal degree in co-relation 56. Up to 3 conditions per place. [2023-11-29 01:54:09,091 INFO L82 GeneralOperation]: Start removeDead. Operand has 59 places, 60 transitions, 130 flow [2023-11-29 01:54:09,093 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 59 places, 60 transitions, 130 flow [2023-11-29 01:54:09,094 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 01:54:09,095 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;@4f1e3197, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 01:54:09,095 INFO L358 AbstractCegarLoop]: Starting to check reachability of 25 error locations. [2023-11-29 01:54:09,098 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 01:54:09,098 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-11-29 01:54:09,098 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 01:54:09,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:54:09,098 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-29 01:54:09,099 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 22 more)] === [2023-11-29 01:54:09,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:54:09,099 INFO L85 PathProgramCache]: Analyzing trace with hash 334784, now seen corresponding path program 1 times [2023-11-29 01:54:09,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:54:09,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120445210] [2023-11-29 01:54:09,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:54:09,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:54:09,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:54:09,151 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 01:54:09,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:54:09,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120445210] [2023-11-29 01:54:09,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120445210] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:54:09,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:54:09,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 01:54:09,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016962649] [2023-11-29 01:54:09,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:54:09,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:54:09,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:54:09,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:54:09,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:54:09,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 60 [2023-11-29 01:54:09,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 60 transitions, 130 flow. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 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 01:54:09,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:54:09,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 60 [2023-11-29 01:54:09,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:54:09,419 INFO L124 PetriNetUnfolderBase]: 580/1737 cut-off events. [2023-11-29 01:54:09,420 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-11-29 01:54:09,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2674 conditions, 1737 events. 580/1737 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 12841 event pairs, 464 based on Foata normal form. 152/1505 useless extension candidates. Maximal degree in co-relation 1763. Up to 907 conditions per place. [2023-11-29 01:54:09,436 INFO L140 encePairwiseOnDemand]: 53/60 looper letters, 21 selfloop transitions, 1 changer transitions 0/50 dead transitions. [2023-11-29 01:54:09,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 50 transitions, 154 flow [2023-11-29 01:54:09,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:54:09,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 01:54:09,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 115 transitions. [2023-11-29 01:54:09,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6388888888888888 [2023-11-29 01:54:09,439 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 115 transitions. [2023-11-29 01:54:09,439 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 115 transitions. [2023-11-29 01:54:09,440 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:54:09,440 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 115 transitions. [2023-11-29 01:54:09,441 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 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 01:54:09,442 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 60.0) internal successors, (240), 4 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:54:09,442 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 60.0) internal successors, (240), 4 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:54:09,442 INFO L175 Difference]: Start difference. First operand has 59 places, 60 transitions, 130 flow. Second operand 3 states and 115 transitions. [2023-11-29 01:54:09,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 50 transitions, 154 flow [2023-11-29 01:54:09,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 50 transitions, 154 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-29 01:54:09,445 INFO L231 Difference]: Finished difference. Result has 55 places, 50 transitions, 112 flow [2023-11-29 01:54:09,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=55, PETRI_TRANSITIONS=50} [2023-11-29 01:54:09,446 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -4 predicate places. [2023-11-29 01:54:09,446 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 50 transitions, 112 flow [2023-11-29 01:54:09,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 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 01:54:09,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:54:09,447 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-29 01:54:09,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-29 01:54:09,447 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 22 more)] === [2023-11-29 01:54:09,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:54:09,448 INFO L85 PathProgramCache]: Analyzing trace with hash 334785, now seen corresponding path program 1 times [2023-11-29 01:54:09,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:54:09,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779308944] [2023-11-29 01:54:09,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:54:09,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:54:09,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:54:09,516 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 01:54:09,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:54:09,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779308944] [2023-11-29 01:54:09,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779308944] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:54:09,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:54:09,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 01:54:09,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440036638] [2023-11-29 01:54:09,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:54:09,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:54:09,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:54:09,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:54:09,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:54:09,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 60 [2023-11-29 01:54:09,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 50 transitions, 112 flow. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:54:09,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:54:09,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 60 [2023-11-29 01:54:09,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:54:09,737 INFO L124 PetriNetUnfolderBase]: 417/1281 cut-off events. [2023-11-29 01:54:09,737 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-11-29 01:54:09,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1975 conditions, 1281 events. 417/1281 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 8885 event pairs, 330 based on Foata normal form. 82/1075 useless extension candidates. Maximal degree in co-relation 1967. Up to 662 conditions per place. [2023-11-29 01:54:09,749 INFO L140 encePairwiseOnDemand]: 58/60 looper letters, 20 selfloop transitions, 1 changer transitions 0/49 dead transitions. [2023-11-29 01:54:09,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 49 transitions, 152 flow [2023-11-29 01:54:09,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:54:09,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 01:54:09,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 112 transitions. [2023-11-29 01:54:09,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6222222222222222 [2023-11-29 01:54:09,751 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 112 transitions. [2023-11-29 01:54:09,751 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 112 transitions. [2023-11-29 01:54:09,751 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:54:09,752 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 112 transitions. [2023-11-29 01:54:09,752 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:54:09,753 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 60.0) internal successors, (240), 4 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:54:09,753 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 60.0) internal successors, (240), 4 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:54:09,754 INFO L175 Difference]: Start difference. First operand has 55 places, 50 transitions, 112 flow. Second operand 3 states and 112 transitions. [2023-11-29 01:54:09,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 49 transitions, 152 flow [2023-11-29 01:54:09,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 49 transitions, 151 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 01:54:09,756 INFO L231 Difference]: Finished difference. Result has 55 places, 49 transitions, 111 flow [2023-11-29 01:54:09,756 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=109, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=111, PETRI_PLACES=55, PETRI_TRANSITIONS=49} [2023-11-29 01:54:09,757 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -4 predicate places. [2023-11-29 01:54:09,757 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 49 transitions, 111 flow [2023-11-29 01:54:09,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:54:09,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:54:09,757 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:54:09,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-29 01:54:09,758 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thrErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 22 more)] === [2023-11-29 01:54:09,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:54:09,758 INFO L85 PathProgramCache]: Analyzing trace with hash 2078280683, now seen corresponding path program 1 times [2023-11-29 01:54:09,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:54:09,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907545730] [2023-11-29 01:54:09,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:54:09,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:54:09,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:54:09,811 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 01:54:09,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:54:09,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907545730] [2023-11-29 01:54:09,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907545730] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:54:09,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:54:09,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 01:54:09,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826038559] [2023-11-29 01:54:09,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:54:09,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:54:09,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:54:09,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:54:09,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:54:09,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 60 [2023-11-29 01:54:09,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 49 transitions, 111 flow. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:54:09,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:54:09,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 60 [2023-11-29 01:54:09,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:54:10,024 INFO L124 PetriNetUnfolderBase]: 638/1409 cut-off events. [2023-11-29 01:54:10,024 INFO L125 PetriNetUnfolderBase]: For 32/32 co-relation queries the response was YES. [2023-11-29 01:54:10,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2457 conditions, 1409 events. 638/1409 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 8283 event pairs, 527 based on Foata normal form. 0/1391 useless extension candidates. Maximal degree in co-relation 2448. Up to 1009 conditions per place. [2023-11-29 01:54:10,036 INFO L140 encePairwiseOnDemand]: 53/60 looper letters, 24 selfloop transitions, 1 changer transitions 0/43 dead transitions. [2023-11-29 01:54:10,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 43 transitions, 149 flow [2023-11-29 01:54:10,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:54:10,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 01:54:10,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 94 transitions. [2023-11-29 01:54:10,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5222222222222223 [2023-11-29 01:54:10,038 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 94 transitions. [2023-11-29 01:54:10,038 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 94 transitions. [2023-11-29 01:54:10,038 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:54:10,038 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 94 transitions. [2023-11-29 01:54:10,039 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 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 01:54:10,040 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 60.0) internal successors, (240), 4 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:54:10,040 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 60.0) internal successors, (240), 4 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:54:10,040 INFO L175 Difference]: Start difference. First operand has 55 places, 49 transitions, 111 flow. Second operand 3 states and 94 transitions. [2023-11-29 01:54:10,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 43 transitions, 149 flow [2023-11-29 01:54:10,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 43 transitions, 148 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 01:54:10,042 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 100 flow [2023-11-29 01:54:10,043 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=50, PETRI_TRANSITIONS=43} [2023-11-29 01:54:10,043 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -9 predicate places. [2023-11-29 01:54:10,044 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 100 flow [2023-11-29 01:54:10,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:54:10,044 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:54:10,044 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:54:10,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-29 01:54:10,044 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thrErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 22 more)] === [2023-11-29 01:54:10,045 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:54:10,045 INFO L85 PathProgramCache]: Analyzing trace with hash 2078280684, now seen corresponding path program 1 times [2023-11-29 01:54:10,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:54:10,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404260547] [2023-11-29 01:54:10,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:54:10,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:54:10,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:54:10,359 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 01:54:10,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:54:10,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404260547] [2023-11-29 01:54:10,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404260547] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:54:10,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:54:10,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 01:54:10,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345461391] [2023-11-29 01:54:10,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:54:10,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 01:54:10,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:54:10,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 01:54:10,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-29 01:54:10,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 60 [2023-11-29 01:54:10,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 100 flow. Second operand has 6 states, 6 states have (on average 28.5) internal successors, (171), 6 states have internal predecessors, (171), 0 states have call successors, (0), 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 01:54:10,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:54:10,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 60 [2023-11-29 01:54:10,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:54:10,963 INFO L124 PetriNetUnfolderBase]: 927/2253 cut-off events. [2023-11-29 01:54:10,963 INFO L125 PetriNetUnfolderBase]: For 53/53 co-relation queries the response was YES. [2023-11-29 01:54:10,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3792 conditions, 2253 events. 927/2253 cut-off events. For 53/53 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 16324 event pairs, 184 based on Foata normal form. 60/2073 useless extension candidates. Maximal degree in co-relation 3782. Up to 901 conditions per place. [2023-11-29 01:54:10,984 INFO L140 encePairwiseOnDemand]: 51/60 looper letters, 62 selfloop transitions, 8 changer transitions 0/88 dead transitions. [2023-11-29 01:54:10,984 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 88 transitions, 350 flow [2023-11-29 01:54:10,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 01:54:10,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 01:54:10,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 235 transitions. [2023-11-29 01:54:10,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6527777777777778 [2023-11-29 01:54:10,986 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 235 transitions. [2023-11-29 01:54:10,986 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 235 transitions. [2023-11-29 01:54:10,987 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:54:10,987 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 235 transitions. [2023-11-29 01:54:10,988 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 39.166666666666664) internal successors, (235), 6 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 01:54:10,990 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 60.0) internal successors, (420), 7 states have internal predecessors, (420), 0 states have call successors, (0), 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 01:54:10,990 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 60.0) internal successors, (420), 7 states have internal predecessors, (420), 0 states have call successors, (0), 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 01:54:10,990 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 100 flow. Second operand 6 states and 235 transitions. [2023-11-29 01:54:10,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 88 transitions, 350 flow [2023-11-29 01:54:10,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 88 transitions, 349 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 01:54:10,993 INFO L231 Difference]: Finished difference. Result has 58 places, 50 transitions, 159 flow [2023-11-29 01:54:10,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=99, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=159, PETRI_PLACES=58, PETRI_TRANSITIONS=50} [2023-11-29 01:54:10,994 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -1 predicate places. [2023-11-29 01:54:10,995 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 50 transitions, 159 flow [2023-11-29 01:54:10,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 28.5) internal successors, (171), 6 states have internal predecessors, (171), 0 states have call successors, (0), 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 01:54:10,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:54:10,995 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1] [2023-11-29 01:54:10,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-29 01:54:10,996 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 22 more)] === [2023-11-29 01:54:10,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:54:10,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1691296690, now seen corresponding path program 1 times [2023-11-29 01:54:10,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:54:10,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610475151] [2023-11-29 01:54:10,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:54:10,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:54:11,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 01:54:11,014 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-29 01:54:11,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 01:54:11,030 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-29 01:54:11,030 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-29 01:54:11,030 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (24 of 25 remaining) [2023-11-29 01:54:11,030 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 25 remaining) [2023-11-29 01:54:11,030 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 25 remaining) [2023-11-29 01:54:11,030 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (21 of 25 remaining) [2023-11-29 01:54:11,031 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 25 remaining) [2023-11-29 01:54:11,031 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 25 remaining) [2023-11-29 01:54:11,031 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 25 remaining) [2023-11-29 01:54:11,031 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 25 remaining) [2023-11-29 01:54:11,032 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 25 remaining) [2023-11-29 01:54:11,032 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 25 remaining) [2023-11-29 01:54:11,032 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr6ASSERT_VIOLATIONMEMORY_LEAK (14 of 25 remaining) [2023-11-29 01:54:11,032 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 25 remaining) [2023-11-29 01:54:11,032 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 25 remaining) [2023-11-29 01:54:11,033 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 25 remaining) [2023-11-29 01:54:11,033 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 25 remaining) [2023-11-29 01:54:11,033 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 25 remaining) [2023-11-29 01:54:11,033 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 25 remaining) [2023-11-29 01:54:11,033 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr6ASSERT_VIOLATIONMEMORY_LEAK (7 of 25 remaining) [2023-11-29 01:54:11,034 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 25 remaining) [2023-11-29 01:54:11,034 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 25 remaining) [2023-11-29 01:54:11,034 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 25 remaining) [2023-11-29 01:54:11,034 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 25 remaining) [2023-11-29 01:54:11,034 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 25 remaining) [2023-11-29 01:54:11,035 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 25 remaining) [2023-11-29 01:54:11,035 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr6ASSERT_VIOLATIONMEMORY_LEAK (0 of 25 remaining) [2023-11-29 01:54:11,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-29 01:54:11,035 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-11-29 01:54:11,036 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-29 01:54:11,036 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-29 01:54:11,079 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-29 01:54:11,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 83 places, 85 transitions, 188 flow [2023-11-29 01:54:11,095 INFO L124 PetriNetUnfolderBase]: 9/108 cut-off events. [2023-11-29 01:54:11,095 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-29 01:54:11,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121 conditions, 108 events. 9/108 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 359 event pairs, 0 based on Foata normal form. 0/62 useless extension candidates. Maximal degree in co-relation 82. Up to 4 conditions per place. [2023-11-29 01:54:11,096 INFO L82 GeneralOperation]: Start removeDead. Operand has 83 places, 85 transitions, 188 flow [2023-11-29 01:54:11,098 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 83 places, 85 transitions, 188 flow [2023-11-29 01:54:11,099 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 01:54:11,100 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;@4f1e3197, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 01:54:11,101 INFO L358 AbstractCegarLoop]: Starting to check reachability of 32 error locations. [2023-11-29 01:54:11,103 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 01:54:11,103 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-11-29 01:54:11,103 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 01:54:11,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:54:11,104 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-29 01:54:11,104 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 29 more)] === [2023-11-29 01:54:11,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:54:11,104 INFO L85 PathProgramCache]: Analyzing trace with hash 419189, now seen corresponding path program 1 times [2023-11-29 01:54:11,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:54:11,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046475581] [2023-11-29 01:54:11,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:54:11,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:54:11,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:54:11,145 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 01:54:11,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:54:11,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046475581] [2023-11-29 01:54:11,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046475581] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:54:11,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:54:11,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 01:54:11,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840692064] [2023-11-29 01:54:11,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:54:11,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:54:11,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:54:11,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:54:11,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:54:11,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 85 [2023-11-29 01:54:11,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 85 transitions, 188 flow. Second operand has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 0 states have call successors, (0), 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 01:54:11,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:54:11,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 85 [2023-11-29 01:54:11,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:54:13,179 INFO L124 PetriNetUnfolderBase]: 8526/20443 cut-off events. [2023-11-29 01:54:13,179 INFO L125 PetriNetUnfolderBase]: For 532/532 co-relation queries the response was YES. [2023-11-29 01:54:13,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32255 conditions, 20443 events. 8526/20443 cut-off events. For 532/532 co-relation queries the response was YES. Maximal size of possible extension queue 893. Compared 214474 event pairs, 6802 based on Foata normal form. 2012/18167 useless extension candidates. Maximal degree in co-relation 7588. Up to 11489 conditions per place. [2023-11-29 01:54:13,366 INFO L140 encePairwiseOnDemand]: 76/85 looper letters, 30 selfloop transitions, 1 changer transitions 0/72 dead transitions. [2023-11-29 01:54:13,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 72 transitions, 224 flow [2023-11-29 01:54:13,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:54:13,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 01:54:13,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 165 transitions. [2023-11-29 01:54:13,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6470588235294118 [2023-11-29 01:54:13,368 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 165 transitions. [2023-11-29 01:54:13,368 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 165 transitions. [2023-11-29 01:54:13,368 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:54:13,369 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 165 transitions. [2023-11-29 01:54:13,369 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 0 states have call successors, (0), 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 01:54:13,371 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 85.0) internal successors, (340), 4 states have internal predecessors, (340), 0 states have call successors, (0), 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 01:54:13,371 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 85.0) internal successors, (340), 4 states have internal predecessors, (340), 0 states have call successors, (0), 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 01:54:13,371 INFO L175 Difference]: Start difference. First operand has 83 places, 85 transitions, 188 flow. Second operand 3 states and 165 transitions. [2023-11-29 01:54:13,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 72 transitions, 224 flow [2023-11-29 01:54:13,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 72 transitions, 222 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-11-29 01:54:13,375 INFO L231 Difference]: Finished difference. Result has 78 places, 72 transitions, 162 flow [2023-11-29 01:54:13,375 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=162, PETRI_PLACES=78, PETRI_TRANSITIONS=72} [2023-11-29 01:54:13,376 INFO L281 CegarLoopForPetriNet]: 83 programPoint places, -5 predicate places. [2023-11-29 01:54:13,376 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 72 transitions, 162 flow [2023-11-29 01:54:13,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 0 states have call successors, (0), 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 01:54:13,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:54:13,377 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-29 01:54:13,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-29 01:54:13,377 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 29 more)] === [2023-11-29 01:54:13,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:54:13,378 INFO L85 PathProgramCache]: Analyzing trace with hash 419190, now seen corresponding path program 1 times [2023-11-29 01:54:13,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:54:13,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350987121] [2023-11-29 01:54:13,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:54:13,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:54:13,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:54:13,441 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 01:54:13,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:54:13,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350987121] [2023-11-29 01:54:13,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350987121] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:54:13,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:54:13,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 01:54:13,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098312962] [2023-11-29 01:54:13,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:54:13,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:54:13,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:54:13,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:54:13,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:54:13,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 85 [2023-11-29 01:54:13,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 72 transitions, 162 flow. Second operand has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:54:13,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:54:13,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 85 [2023-11-29 01:54:13,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:54:14,883 INFO L124 PetriNetUnfolderBase]: 6219/15118 cut-off events. [2023-11-29 01:54:14,883 INFO L125 PetriNetUnfolderBase]: For 247/247 co-relation queries the response was YES. [2023-11-29 01:54:14,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23808 conditions, 15118 events. 6219/15118 cut-off events. For 247/247 co-relation queries the response was YES. Maximal size of possible extension queue 681. Compared 152575 event pairs, 4929 based on Foata normal form. 740/12609 useless extension candidates. Maximal degree in co-relation 23799. Up to 8438 conditions per place. [2023-11-29 01:54:14,963 INFO L140 encePairwiseOnDemand]: 83/85 looper letters, 29 selfloop transitions, 1 changer transitions 0/71 dead transitions. [2023-11-29 01:54:14,963 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 71 transitions, 220 flow [2023-11-29 01:54:14,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:54:14,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 01:54:14,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 160 transitions. [2023-11-29 01:54:14,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6274509803921569 [2023-11-29 01:54:14,965 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 160 transitions. [2023-11-29 01:54:14,965 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 160 transitions. [2023-11-29 01:54:14,965 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:54:14,965 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 160 transitions. [2023-11-29 01:54:14,966 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:54:14,966 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 85.0) internal successors, (340), 4 states have internal predecessors, (340), 0 states have call successors, (0), 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 01:54:14,967 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 85.0) internal successors, (340), 4 states have internal predecessors, (340), 0 states have call successors, (0), 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 01:54:14,967 INFO L175 Difference]: Start difference. First operand has 78 places, 72 transitions, 162 flow. Second operand 3 states and 160 transitions. [2023-11-29 01:54:14,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 71 transitions, 220 flow [2023-11-29 01:54:14,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 71 transitions, 219 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 01:54:14,970 INFO L231 Difference]: Finished difference. Result has 78 places, 71 transitions, 161 flow [2023-11-29 01:54:14,971 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=161, PETRI_PLACES=78, PETRI_TRANSITIONS=71} [2023-11-29 01:54:14,971 INFO L281 CegarLoopForPetriNet]: 83 programPoint places, -5 predicate places. [2023-11-29 01:54:14,971 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 71 transitions, 161 flow [2023-11-29 01:54:14,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:54:14,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:54:14,972 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:54:14,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-29 01:54:14,973 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thrErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 29 more)] === [2023-11-29 01:54:14,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:54:14,973 INFO L85 PathProgramCache]: Analyzing trace with hash -2076776207, now seen corresponding path program 1 times [2023-11-29 01:54:14,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:54:14,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29380140] [2023-11-29 01:54:14,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:54:14,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:54:14,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:54:15,176 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 01:54:15,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:54:15,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29380140] [2023-11-29 01:54:15,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29380140] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:54:15,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:54:15,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 01:54:15,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309330191] [2023-11-29 01:54:15,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:54:15,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 01:54:15,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:54:15,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 01:54:15,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 01:54:15,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 85 [2023-11-29 01:54:15,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 71 transitions, 161 flow. Second operand has 5 states, 5 states have (on average 42.6) internal successors, (213), 5 states have internal predecessors, (213), 0 states have call successors, (0), 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 01:54:15,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:54:15,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 85 [2023-11-29 01:54:15,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:54:17,773 INFO L124 PetriNetUnfolderBase]: 12758/30354 cut-off events. [2023-11-29 01:54:17,773 INFO L125 PetriNetUnfolderBase]: For 490/490 co-relation queries the response was YES. [2023-11-29 01:54:17,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48107 conditions, 30354 events. 12758/30354 cut-off events. For 490/490 co-relation queries the response was YES. Maximal size of possible extension queue 1344. Compared 339202 event pairs, 3862 based on Foata normal form. 414/24540 useless extension candidates. Maximal degree in co-relation 48097. Up to 11383 conditions per place. [2023-11-29 01:54:17,937 INFO L140 encePairwiseOnDemand]: 76/85 looper letters, 74 selfloop transitions, 9 changer transitions 0/121 dead transitions. [2023-11-29 01:54:17,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 121 transitions, 457 flow [2023-11-29 01:54:17,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 01:54:17,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 01:54:17,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 291 transitions. [2023-11-29 01:54:17,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6847058823529412 [2023-11-29 01:54:17,939 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 291 transitions. [2023-11-29 01:54:17,939 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 291 transitions. [2023-11-29 01:54:17,940 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:54:17,940 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 291 transitions. [2023-11-29 01:54:17,941 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 58.2) internal successors, (291), 5 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 01:54:17,942 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 85.0) internal successors, (510), 6 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:54:17,943 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 85.0) internal successors, (510), 6 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:54:17,943 INFO L175 Difference]: Start difference. First operand has 78 places, 71 transitions, 161 flow. Second operand 5 states and 291 transitions. [2023-11-29 01:54:17,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 121 transitions, 457 flow [2023-11-29 01:54:17,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 121 transitions, 456 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 01:54:17,948 INFO L231 Difference]: Finished difference. Result has 84 places, 79 transitions, 227 flow [2023-11-29 01:54:17,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=227, PETRI_PLACES=84, PETRI_TRANSITIONS=79} [2023-11-29 01:54:17,949 INFO L281 CegarLoopForPetriNet]: 83 programPoint places, 1 predicate places. [2023-11-29 01:54:17,949 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 79 transitions, 227 flow [2023-11-29 01:54:17,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 42.6) internal successors, (213), 5 states have internal predecessors, (213), 0 states have call successors, (0), 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 01:54:17,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:54:17,949 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:54:17,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-29 01:54:17,950 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thrErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 29 more)] === [2023-11-29 01:54:17,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:54:17,950 INFO L85 PathProgramCache]: Analyzing trace with hash -2076776208, now seen corresponding path program 1 times [2023-11-29 01:54:17,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:54:17,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531167703] [2023-11-29 01:54:17,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:54:17,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:54:17,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:54:17,987 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 01:54:17,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:54:17,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531167703] [2023-11-29 01:54:17,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531167703] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:54:17,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:54:17,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 01:54:17,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676102003] [2023-11-29 01:54:17,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:54:17,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:54:17,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:54:17,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:54:17,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:54:18,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 85 [2023-11-29 01:54:18,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 79 transitions, 227 flow. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 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 01:54:18,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:54:18,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 85 [2023-11-29 01:54:18,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:54:20,937 INFO L124 PetriNetUnfolderBase]: 19363/34820 cut-off events. [2023-11-29 01:54:20,937 INFO L125 PetriNetUnfolderBase]: For 5468/5468 co-relation queries the response was YES. [2023-11-29 01:54:21,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67207 conditions, 34820 events. 19363/34820 cut-off events. For 5468/5468 co-relation queries the response was YES. Maximal size of possible extension queue 1290. Compared 308674 event pairs, 15643 based on Foata normal form. 0/34514 useless extension candidates. Maximal degree in co-relation 67193. Up to 26469 conditions per place. [2023-11-29 01:54:21,198 INFO L140 encePairwiseOnDemand]: 75/85 looper letters, 43 selfloop transitions, 1 changer transitions 0/70 dead transitions. [2023-11-29 01:54:21,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 70 transitions, 297 flow [2023-11-29 01:54:21,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:54:21,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 01:54:21,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 132 transitions. [2023-11-29 01:54:21,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5176470588235295 [2023-11-29 01:54:21,200 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 132 transitions. [2023-11-29 01:54:21,200 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 132 transitions. [2023-11-29 01:54:21,200 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:54:21,200 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 132 transitions. [2023-11-29 01:54:21,201 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:54:21,201 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 85.0) internal successors, (340), 4 states have internal predecessors, (340), 0 states have call successors, (0), 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 01:54:21,202 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 85.0) internal successors, (340), 4 states have internal predecessors, (340), 0 states have call successors, (0), 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 01:54:21,202 INFO L175 Difference]: Start difference. First operand has 84 places, 79 transitions, 227 flow. Second operand 3 states and 132 transitions. [2023-11-29 01:54:21,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 70 transitions, 297 flow [2023-11-29 01:54:21,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 70 transitions, 297 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-29 01:54:21,207 INFO L231 Difference]: Finished difference. Result has 77 places, 70 transitions, 211 flow [2023-11-29 01:54:21,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=209, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=211, PETRI_PLACES=77, PETRI_TRANSITIONS=70} [2023-11-29 01:54:21,208 INFO L281 CegarLoopForPetriNet]: 83 programPoint places, -6 predicate places. [2023-11-29 01:54:21,208 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 70 transitions, 211 flow [2023-11-29 01:54:21,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 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 01:54:21,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:54:21,208 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:54:21,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-29 01:54:21,209 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thrErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 29 more)] === [2023-11-29 01:54:21,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:54:21,209 INFO L85 PathProgramCache]: Analyzing trace with hash 1946976423, now seen corresponding path program 1 times [2023-11-29 01:54:21,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:54:21,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270218000] [2023-11-29 01:54:21,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:54:21,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:54:21,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:54:21,411 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 01:54:21,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:54:21,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270218000] [2023-11-29 01:54:21,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270218000] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:54:21,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:54:21,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 01:54:21,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965761795] [2023-11-29 01:54:21,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:54:21,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 01:54:21,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:54:21,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 01:54:21,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 01:54:21,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 85 [2023-11-29 01:54:21,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 70 transitions, 211 flow. Second operand has 5 states, 5 states have (on average 43.0) internal successors, (215), 5 states have internal predecessors, (215), 0 states have call successors, (0), 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 01:54:21,524 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:54:21,524 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 85 [2023-11-29 01:54:21,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:54:24,778 INFO L124 PetriNetUnfolderBase]: 19780/39962 cut-off events. [2023-11-29 01:54:24,778 INFO L125 PetriNetUnfolderBase]: For 6698/6698 co-relation queries the response was YES. [2023-11-29 01:54:24,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74313 conditions, 39962 events. 19780/39962 cut-off events. For 6698/6698 co-relation queries the response was YES. Maximal size of possible extension queue 1900. Compared 414027 event pairs, 6796 based on Foata normal form. 441/37010 useless extension candidates. Maximal degree in co-relation 74297. Up to 19008 conditions per place. [2023-11-29 01:54:25,058 INFO L140 encePairwiseOnDemand]: 76/85 looper letters, 76 selfloop transitions, 12 changer transitions 0/117 dead transitions. [2023-11-29 01:54:25,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 117 transitions, 536 flow [2023-11-29 01:54:25,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 01:54:25,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 01:54:25,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 289 transitions. [2023-11-29 01:54:25,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.68 [2023-11-29 01:54:25,061 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 289 transitions. [2023-11-29 01:54:25,061 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 289 transitions. [2023-11-29 01:54:25,061 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:54:25,061 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 289 transitions. [2023-11-29 01:54:25,062 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 57.8) internal successors, (289), 5 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 01:54:25,063 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 85.0) internal successors, (510), 6 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:54:25,064 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 85.0) internal successors, (510), 6 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:54:25,064 INFO L175 Difference]: Start difference. First operand has 77 places, 70 transitions, 211 flow. Second operand 5 states and 289 transitions. [2023-11-29 01:54:25,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 117 transitions, 536 flow [2023-11-29 01:54:25,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 117 transitions, 535 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 01:54:25,069 INFO L231 Difference]: Finished difference. Result has 82 places, 76 transitions, 285 flow [2023-11-29 01:54:25,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=285, PETRI_PLACES=82, PETRI_TRANSITIONS=76} [2023-11-29 01:54:25,070 INFO L281 CegarLoopForPetriNet]: 83 programPoint places, -1 predicate places. [2023-11-29 01:54:25,070 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 76 transitions, 285 flow [2023-11-29 01:54:25,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 43.0) internal successors, (215), 5 states have internal predecessors, (215), 0 states have call successors, (0), 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 01:54:25,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:54:25,070 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1] [2023-11-29 01:54:25,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-29 01:54:25,070 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 29 more)] === [2023-11-29 01:54:25,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:54:25,071 INFO L85 PathProgramCache]: Analyzing trace with hash -856703215, now seen corresponding path program 1 times [2023-11-29 01:54:25,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:54:25,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124331399] [2023-11-29 01:54:25,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:54:25,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:54:25,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 01:54:25,084 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-29 01:54:25,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 01:54:25,098 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-29 01:54:25,098 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-29 01:54:25,099 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (31 of 32 remaining) [2023-11-29 01:54:25,099 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 32 remaining) [2023-11-29 01:54:25,099 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 32 remaining) [2023-11-29 01:54:25,099 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (28 of 32 remaining) [2023-11-29 01:54:25,099 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 32 remaining) [2023-11-29 01:54:25,099 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 32 remaining) [2023-11-29 01:54:25,099 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 32 remaining) [2023-11-29 01:54:25,099 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 32 remaining) [2023-11-29 01:54:25,100 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 32 remaining) [2023-11-29 01:54:25,100 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 32 remaining) [2023-11-29 01:54:25,100 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr6ASSERT_VIOLATIONMEMORY_LEAK (21 of 32 remaining) [2023-11-29 01:54:25,100 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 32 remaining) [2023-11-29 01:54:25,100 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 32 remaining) [2023-11-29 01:54:25,100 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 32 remaining) [2023-11-29 01:54:25,100 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 32 remaining) [2023-11-29 01:54:25,100 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 32 remaining) [2023-11-29 01:54:25,101 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 32 remaining) [2023-11-29 01:54:25,101 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr6ASSERT_VIOLATIONMEMORY_LEAK (14 of 32 remaining) [2023-11-29 01:54:25,101 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 32 remaining) [2023-11-29 01:54:25,101 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 32 remaining) [2023-11-29 01:54:25,101 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 32 remaining) [2023-11-29 01:54:25,101 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 32 remaining) [2023-11-29 01:54:25,101 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 32 remaining) [2023-11-29 01:54:25,101 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 32 remaining) [2023-11-29 01:54:25,102 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr6ASSERT_VIOLATIONMEMORY_LEAK (7 of 32 remaining) [2023-11-29 01:54:25,102 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 32 remaining) [2023-11-29 01:54:25,102 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 32 remaining) [2023-11-29 01:54:25,102 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 32 remaining) [2023-11-29 01:54:25,102 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 32 remaining) [2023-11-29 01:54:25,102 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 32 remaining) [2023-11-29 01:54:25,102 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 32 remaining) [2023-11-29 01:54:25,102 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr6ASSERT_VIOLATIONMEMORY_LEAK (0 of 32 remaining) [2023-11-29 01:54:25,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-29 01:54:25,103 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2023-11-29 01:54:25,104 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-29 01:54:25,104 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-29 01:54:25,141 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-29 01:54:25,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 107 places, 110 transitions, 248 flow [2023-11-29 01:54:25,159 INFO L124 PetriNetUnfolderBase]: 12/141 cut-off events. [2023-11-29 01:54:25,159 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-29 01:54:25,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 160 conditions, 141 events. 12/141 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 511 event pairs, 0 based on Foata normal form. 0/81 useless extension candidates. Maximal degree in co-relation 120. Up to 5 conditions per place. [2023-11-29 01:54:25,160 INFO L82 GeneralOperation]: Start removeDead. Operand has 107 places, 110 transitions, 248 flow [2023-11-29 01:54:25,162 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 107 places, 110 transitions, 248 flow [2023-11-29 01:54:25,163 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 01:54:25,164 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;@4f1e3197, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 01:54:25,164 INFO L358 AbstractCegarLoop]: Starting to check reachability of 39 error locations. [2023-11-29 01:54:25,165 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 01:54:25,166 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-11-29 01:54:25,166 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 01:54:25,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:54:25,166 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-29 01:54:25,166 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 36 more)] === [2023-11-29 01:54:25,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:54:25,167 INFO L85 PathProgramCache]: Analyzing trace with hash 528419, now seen corresponding path program 1 times [2023-11-29 01:54:25,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:54:25,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637560352] [2023-11-29 01:54:25,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:54:25,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:54:25,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:54:25,204 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 01:54:25,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:54:25,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637560352] [2023-11-29 01:54:25,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637560352] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:54:25,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:54:25,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 01:54:25,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744748225] [2023-11-29 01:54:25,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:54:25,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:54:25,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:54:25,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:54:25,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:54:25,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 110 [2023-11-29 01:54:25,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 110 transitions, 248 flow. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 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 01:54:25,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:54:25,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 110 [2023-11-29 01:54:25,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:54:44,235 INFO L124 PetriNetUnfolderBase]: 106402/215167 cut-off events. [2023-11-29 01:54:44,235 INFO L125 PetriNetUnfolderBase]: For 8438/8438 co-relation queries the response was YES. [2023-11-29 01:54:44,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 351875 conditions, 215167 events. 106402/215167 cut-off events. For 8438/8438 co-relation queries the response was YES. Maximal size of possible extension queue 7354. Compared 2674475 event pairs, 84934 based on Foata normal form. 24024/199633 useless extension candidates. Maximal degree in co-relation 32332. Up to 133089 conditions per place. [2023-11-29 01:54:45,860 INFO L140 encePairwiseOnDemand]: 99/110 looper letters, 39 selfloop transitions, 1 changer transitions 0/94 dead transitions. [2023-11-29 01:54:45,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 94 transitions, 296 flow [2023-11-29 01:54:45,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:54:45,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 01:54:45,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 215 transitions. [2023-11-29 01:54:45,862 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6515151515151515 [2023-11-29 01:54:45,862 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 215 transitions. [2023-11-29 01:54:45,862 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 215 transitions. [2023-11-29 01:54:45,862 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:54:45,863 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 215 transitions. [2023-11-29 01:54:45,864 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 0 states have call successors, (0), 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 01:54:45,864 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 110.0) internal successors, (440), 4 states have internal predecessors, (440), 0 states have call successors, (0), 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 01:54:45,865 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 110.0) internal successors, (440), 4 states have internal predecessors, (440), 0 states have call successors, (0), 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 01:54:45,865 INFO L175 Difference]: Start difference. First operand has 107 places, 110 transitions, 248 flow. Second operand 3 states and 215 transitions. [2023-11-29 01:54:45,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 94 transitions, 296 flow [2023-11-29 01:54:45,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 94 transitions, 290 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-11-29 01:54:45,870 INFO L231 Difference]: Finished difference. Result has 101 places, 94 transitions, 212 flow [2023-11-29 01:54:45,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=110, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=212, PETRI_PLACES=101, PETRI_TRANSITIONS=94} [2023-11-29 01:54:45,871 INFO L281 CegarLoopForPetriNet]: 107 programPoint places, -6 predicate places. [2023-11-29 01:54:45,871 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 94 transitions, 212 flow [2023-11-29 01:54:45,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 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 01:54:45,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:54:45,871 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-29 01:54:45,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-29 01:54:45,871 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 36 more)] === [2023-11-29 01:54:45,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:54:45,872 INFO L85 PathProgramCache]: Analyzing trace with hash 528420, now seen corresponding path program 1 times [2023-11-29 01:54:45,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:54:45,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759209071] [2023-11-29 01:54:45,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:54:45,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:54:45,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:54:45,918 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 01:54:45,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:54:45,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759209071] [2023-11-29 01:54:45,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759209071] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:54:45,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:54:45,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 01:54:45,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568752654] [2023-11-29 01:54:45,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:54:45,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:54:45,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:54:45,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:54:45,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:54:45,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 110 [2023-11-29 01:54:45,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 94 transitions, 212 flow. Second operand has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 0 states have call successors, (0), 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 01:54:45,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:54:45,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 110 [2023-11-29 01:54:45,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:54:59,280 INFO L124 PetriNetUnfolderBase]: 78192/160304 cut-off events. [2023-11-29 01:54:59,280 INFO L125 PetriNetUnfolderBase]: For 2224/2224 co-relation queries the response was YES. [2023-11-29 01:54:59,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 260711 conditions, 160304 events. 78192/160304 cut-off events. For 2224/2224 co-relation queries the response was YES. Maximal size of possible extension queue 5591. Compared 1949488 event pairs, 62118 based on Foata normal form. 6663/136340 useless extension candidates. Maximal degree in co-relation 260701. Up to 98180 conditions per place. [2023-11-29 01:55:00,428 INFO L140 encePairwiseOnDemand]: 108/110 looper letters, 38 selfloop transitions, 1 changer transitions 0/93 dead transitions. [2023-11-29 01:55:00,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 93 transitions, 288 flow [2023-11-29 01:55:00,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:55:00,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 01:55:00,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 208 transitions. [2023-11-29 01:55:00,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6303030303030303 [2023-11-29 01:55:00,430 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 208 transitions. [2023-11-29 01:55:00,431 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 208 transitions. [2023-11-29 01:55:00,431 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:55:00,431 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 208 transitions. [2023-11-29 01:55:00,432 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 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 01:55:00,433 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 110.0) internal successors, (440), 4 states have internal predecessors, (440), 0 states have call successors, (0), 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 01:55:00,434 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 110.0) internal successors, (440), 4 states have internal predecessors, (440), 0 states have call successors, (0), 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 01:55:00,434 INFO L175 Difference]: Start difference. First operand has 101 places, 94 transitions, 212 flow. Second operand 3 states and 208 transitions. [2023-11-29 01:55:00,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 93 transitions, 288 flow [2023-11-29 01:55:00,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 93 transitions, 287 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 01:55:00,438 INFO L231 Difference]: Finished difference. Result has 101 places, 93 transitions, 211 flow [2023-11-29 01:55:00,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=110, PETRI_DIFFERENCE_MINUEND_FLOW=209, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=211, PETRI_PLACES=101, PETRI_TRANSITIONS=93} [2023-11-29 01:55:00,439 INFO L281 CegarLoopForPetriNet]: 107 programPoint places, -6 predicate places. [2023-11-29 01:55:00,439 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 93 transitions, 211 flow [2023-11-29 01:55:00,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 0 states have call successors, (0), 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 01:55:00,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:55:00,440 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:55:00,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-29 01:55:00,440 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thrErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 36 more)] === [2023-11-29 01:55:00,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:55:00,441 INFO L85 PathProgramCache]: Analyzing trace with hash 137613702, now seen corresponding path program 1 times [2023-11-29 01:55:00,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:55:00,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373912659] [2023-11-29 01:55:00,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:55:00,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:55:00,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:55:00,486 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 01:55:00,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:55:00,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373912659] [2023-11-29 01:55:00,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373912659] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:55:00,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:55:00,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 01:55:00,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9973986] [2023-11-29 01:55:00,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:55:00,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:55:00,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:55:00,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:55:00,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:55:00,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 110 [2023-11-29 01:55:00,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 93 transitions, 211 flow. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 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 01:55:00,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:55:00,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 110 [2023-11-29 01:55:00,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:55:22,517 INFO L124 PetriNetUnfolderBase]: 176270/274333 cut-off events. [2023-11-29 01:55:22,517 INFO L125 PetriNetUnfolderBase]: For 4114/4114 co-relation queries the response was YES. [2023-11-29 01:55:23,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 499957 conditions, 274333 events. 176270/274333 cut-off events. For 4114/4114 co-relation queries the response was YES. Maximal size of possible extension queue 7146. Compared 2522712 event pairs, 146096 based on Foata normal form. 0/271798 useless extension candidates. Maximal degree in co-relation 499946. Up to 221506 conditions per place. [2023-11-29 01:55:24,505 INFO L140 encePairwiseOnDemand]: 97/110 looper letters, 46 selfloop transitions, 1 changer transitions 0/81 dead transitions. [2023-11-29 01:55:24,505 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 81 transitions, 281 flow [2023-11-29 01:55:24,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:55:24,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 01:55:24,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 170 transitions. [2023-11-29 01:55:24,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5151515151515151 [2023-11-29 01:55:24,507 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 170 transitions. [2023-11-29 01:55:24,508 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 170 transitions. [2023-11-29 01:55:24,508 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:55:24,508 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 170 transitions. [2023-11-29 01:55:24,509 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 0 states have call successors, (0), 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 01:55:24,510 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 110.0) internal successors, (440), 4 states have internal predecessors, (440), 0 states have call successors, (0), 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 01:55:24,510 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 110.0) internal successors, (440), 4 states have internal predecessors, (440), 0 states have call successors, (0), 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 01:55:24,510 INFO L175 Difference]: Start difference. First operand has 101 places, 93 transitions, 211 flow. Second operand 3 states and 170 transitions. [2023-11-29 01:55:24,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 81 transitions, 281 flow [2023-11-29 01:55:24,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 81 transitions, 280 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 01:55:24,514 INFO L231 Difference]: Finished difference. Result has 90 places, 81 transitions, 188 flow [2023-11-29 01:55:24,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=110, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=188, PETRI_PLACES=90, PETRI_TRANSITIONS=81} [2023-11-29 01:55:24,515 INFO L281 CegarLoopForPetriNet]: 107 programPoint places, -17 predicate places. [2023-11-29 01:55:24,515 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 81 transitions, 188 flow [2023-11-29 01:55:24,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 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 01:55:24,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:55:24,516 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:55:24,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-29 01:55:24,516 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thrErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 36 more)] === [2023-11-29 01:55:24,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:55:24,516 INFO L85 PathProgramCache]: Analyzing trace with hash 137613703, now seen corresponding path program 1 times [2023-11-29 01:55:24,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:55:24,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10766482] [2023-11-29 01:55:24,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:55:24,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:55:24,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:55:24,787 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 01:55:24,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:55:24,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10766482] [2023-11-29 01:55:24,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10766482] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:55:24,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:55:24,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 01:55:24,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819601109] [2023-11-29 01:55:24,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:55:24,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 01:55:24,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:55:24,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 01:55:24,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-29 01:55:25,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 110 [2023-11-29 01:55:25,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 81 transitions, 188 flow. Second operand has 6 states, 6 states have (on average 54.5) internal successors, (327), 6 states have internal predecessors, (327), 0 states have call successors, (0), 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 01:55:25,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:55:25,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 110 [2023-11-29 01:55:25,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 01:55:51,256 INFO L124 PetriNetUnfolderBase]: 177243/334085 cut-off events. [2023-11-29 01:55:51,256 INFO L125 PetriNetUnfolderBase]: For 5110/5110 co-relation queries the response was YES. [2023-11-29 01:55:52,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 562537 conditions, 334085 events. 177243/334085 cut-off events. For 5110/5110 co-relation queries the response was YES. Maximal size of possible extension queue 10908. Compared 4081021 event pairs, 52825 based on Foata normal form. 4920/300806 useless extension candidates. Maximal degree in co-relation 562525. Up to 140013 conditions per place. [2023-11-29 01:55:53,839 INFO L140 encePairwiseOnDemand]: 99/110 looper letters, 128 selfloop transitions, 12 changer transitions 0/178 dead transitions. [2023-11-29 01:55:53,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 178 transitions, 722 flow [2023-11-29 01:55:53,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 01:55:53,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 01:55:53,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 461 transitions. [2023-11-29 01:55:53,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6984848484848485 [2023-11-29 01:55:53,842 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 461 transitions. [2023-11-29 01:55:53,842 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 461 transitions. [2023-11-29 01:55:53,842 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 01:55:53,842 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 461 transitions. [2023-11-29 01:55:53,844 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 76.83333333333333) internal successors, (461), 6 states have internal predecessors, (461), 0 states have call successors, (0), 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 01:55:53,845 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 110.0) internal successors, (770), 7 states have internal predecessors, (770), 0 states have call successors, (0), 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 01:55:53,846 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 110.0) internal successors, (770), 7 states have internal predecessors, (770), 0 states have call successors, (0), 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 01:55:53,846 INFO L175 Difference]: Start difference. First operand has 90 places, 81 transitions, 188 flow. Second operand 6 states and 461 transitions. [2023-11-29 01:55:53,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 178 transitions, 722 flow [2023-11-29 01:55:53,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 178 transitions, 721 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 01:55:53,852 INFO L231 Difference]: Finished difference. Result has 98 places, 92 transitions, 277 flow [2023-11-29 01:55:53,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=110, PETRI_DIFFERENCE_MINUEND_FLOW=187, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=277, PETRI_PLACES=98, PETRI_TRANSITIONS=92} [2023-11-29 01:55:53,852 INFO L281 CegarLoopForPetriNet]: 107 programPoint places, -9 predicate places. [2023-11-29 01:55:53,852 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 92 transitions, 277 flow [2023-11-29 01:55:53,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 54.5) internal successors, (327), 6 states have internal predecessors, (327), 0 states have call successors, (0), 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 01:55:53,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 01:55:53,853 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:55:53,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-29 01:55:53,853 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thrErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 36 more)] === [2023-11-29 01:55:53,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:55:53,853 INFO L85 PathProgramCache]: Analyzing trace with hash 83867533, now seen corresponding path program 1 times [2023-11-29 01:55:53,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:55:53,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930905355] [2023-11-29 01:55:53,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:55:53,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:55:53,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:55:54,067 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 01:55:54,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:55:54,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930905355] [2023-11-29 01:55:54,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930905355] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:55:54,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:55:54,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 01:55:54,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967350977] [2023-11-29 01:55:54,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:55:54,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 01:55:54,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:55:54,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 01:55:54,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-29 01:55:54,288 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 110 [2023-11-29 01:55:54,289 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 92 transitions, 277 flow. Second operand has 6 states, 6 states have (on average 54.833333333333336) internal successors, (329), 6 states have internal predecessors, (329), 0 states have call successors, (0), 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 01:55:54,289 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 01:55:54,289 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 110 [2023-11-29 01:55:54,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand