./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread-ext/14_spin2003-pthread.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_132c19f5-4091-44ef-a327-072697b224c9/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_132c19f5-4091-44ef-a327-072697b224c9/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_132c19f5-4091-44ef-a327-072697b224c9/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_132c19f5-4091-44ef-a327-072697b224c9/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-ext/14_spin2003-pthread.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_132c19f5-4091-44ef-a327-072697b224c9/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_132c19f5-4091-44ef-a327-072697b224c9/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 f42d37a05f48e892c5a546503245e38980b0f6e32be2f52b67eb1c08983f5b1e --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-28 23:51:29,219 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-28 23:51:29,287 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_132c19f5-4091-44ef-a327-072697b224c9/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-28 23:51:29,292 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-28 23:51:29,293 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-28 23:51:29,320 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-28 23:51:29,321 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-28 23:51:29,322 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-28 23:51:29,323 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-28 23:51:29,323 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-28 23:51:29,324 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-28 23:51:29,324 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-28 23:51:29,325 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-28 23:51:29,326 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-28 23:51:29,327 INFO L153 SettingsManager]: * Use SBE=true [2023-11-28 23:51:29,327 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-28 23:51:29,328 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-28 23:51:29,329 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-28 23:51:29,329 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-28 23:51:29,330 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-28 23:51:29,330 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-28 23:51:29,331 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-28 23:51:29,331 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-28 23:51:29,332 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-28 23:51:29,332 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-28 23:51:29,333 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-28 23:51:29,333 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-28 23:51:29,333 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-28 23:51:29,334 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-28 23:51:29,334 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-28 23:51:29,335 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-28 23:51:29,335 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-28 23:51:29,336 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-28 23:51:29,336 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-28 23:51:29,336 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-28 23:51:29,336 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-28 23:51:29,337 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-28 23:51:29,337 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-28 23:51:29,337 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-28 23:51:29,337 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-28 23:51:29,337 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-28 23:51:29,338 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_132c19f5-4091-44ef-a327-072697b224c9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_132c19f5-4091-44ef-a327-072697b224c9/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f42d37a05f48e892c5a546503245e38980b0f6e32be2f52b67eb1c08983f5b1e [2023-11-28 23:51:29,563 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-28 23:51:29,584 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-28 23:51:29,587 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-28 23:51:29,588 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-28 23:51:29,588 INFO L274 PluginConnector]: CDTParser initialized [2023-11-28 23:51:29,589 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_132c19f5-4091-44ef-a327-072697b224c9/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/pthread-ext/14_spin2003-pthread.i [2023-11-28 23:51:32,317 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-28 23:51:32,526 INFO L384 CDTParser]: Found 1 translation units. [2023-11-28 23:51:32,527 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_132c19f5-4091-44ef-a327-072697b224c9/sv-benchmarks/c/pthread-ext/14_spin2003-pthread.i [2023-11-28 23:51:32,542 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_132c19f5-4091-44ef-a327-072697b224c9/bin/uautomizer-verify-BQ2R08f2Ya/data/588257ef0/e99815218121435cade2c6441a386ae2/FLAG987064408 [2023-11-28 23:51:32,554 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_132c19f5-4091-44ef-a327-072697b224c9/bin/uautomizer-verify-BQ2R08f2Ya/data/588257ef0/e99815218121435cade2c6441a386ae2 [2023-11-28 23:51:32,557 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-28 23:51:32,558 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-28 23:51:32,560 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-28 23:51:32,560 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-28 23:51:32,565 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-28 23:51:32,565 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 11:51:32" (1/1) ... [2023-11-28 23:51:32,566 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c3f9f9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:51:32, skipping insertion in model container [2023-11-28 23:51:32,567 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 11:51:32" (1/1) ... [2023-11-28 23:51:32,607 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-28 23:51:32,887 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-28 23:51:32,900 INFO L202 MainTranslator]: Completed pre-run [2023-11-28 23:51:32,937 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-28 23:51:32,969 INFO L206 MainTranslator]: Completed translation [2023-11-28 23:51:32,969 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:51:32 WrapperNode [2023-11-28 23:51:32,969 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-28 23:51:32,970 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-28 23:51:32,971 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-28 23:51:32,971 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-28 23:51:32,977 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:51:32" (1/1) ... [2023-11-28 23:51:32,990 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:51:32" (1/1) ... [2023-11-28 23:51:33,010 INFO L138 Inliner]: procedures = 162, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 47 [2023-11-28 23:51:33,010 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-28 23:51:33,011 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-28 23:51:33,011 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-28 23:51:33,011 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-28 23:51:33,020 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:51:32" (1/1) ... [2023-11-28 23:51:33,020 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:51:32" (1/1) ... [2023-11-28 23:51:33,023 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:51:32" (1/1) ... [2023-11-28 23:51:33,037 INFO L175 MemorySlicer]: Split 8 memory accesses to 3 slices as follows [2, 5, 1]. 63 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [2, 5, 0]. The 1 writes are split as follows [0, 0, 1]. [2023-11-28 23:51:33,038 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:51:32" (1/1) ... [2023-11-28 23:51:33,038 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:51:32" (1/1) ... [2023-11-28 23:51:33,043 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:51:32" (1/1) ... [2023-11-28 23:51:33,047 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:51:32" (1/1) ... [2023-11-28 23:51:33,049 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:51:32" (1/1) ... [2023-11-28 23:51:33,050 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:51:32" (1/1) ... [2023-11-28 23:51:33,053 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-28 23:51:33,054 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-28 23:51:33,054 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-28 23:51:33,055 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-28 23:51:33,055 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:51:32" (1/1) ... [2023-11-28 23:51:33,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-28 23:51:33,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_132c19f5-4091-44ef-a327-072697b224c9/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:51:33,087 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_132c19f5-4091-44ef-a327-072697b224c9/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-28 23:51:33,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_132c19f5-4091-44ef-a327-072697b224c9/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-28 23:51:33,124 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-11-28 23:51:33,124 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-11-28 23:51:33,125 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-28 23:51:33,125 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-28 23:51:33,125 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-28 23:51:33,125 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-28 23:51:33,125 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-28 23:51:33,125 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-28 23:51:33,126 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-28 23:51:33,126 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-28 23:51:33,126 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-28 23:51:33,126 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-28 23:51:33,126 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-28 23:51:33,126 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-28 23:51:33,127 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-28 23:51:33,128 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-28 23:51:33,237 INFO L241 CfgBuilder]: Building ICFG [2023-11-28 23:51:33,238 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-28 23:51:33,358 INFO L282 CfgBuilder]: Performing block encoding [2023-11-28 23:51:33,442 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-28 23:51:33,442 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-28 23:51:33,443 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 11:51:33 BoogieIcfgContainer [2023-11-28 23:51:33,443 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-28 23:51:33,446 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-28 23:51:33,446 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-28 23:51:33,450 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-28 23:51:33,450 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 11:51:32" (1/3) ... [2023-11-28 23:51:33,451 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d0d3603 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 11:51:33, skipping insertion in model container [2023-11-28 23:51:33,451 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:51:32" (2/3) ... [2023-11-28 23:51:33,452 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d0d3603 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 11:51:33, skipping insertion in model container [2023-11-28 23:51:33,452 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 11:51:33" (3/3) ... [2023-11-28 23:51:33,453 INFO L112 eAbstractionObserver]: Analyzing ICFG 14_spin2003-pthread.i [2023-11-28 23:51:33,476 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-28 23:51:33,476 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2023-11-28 23:51:33,476 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-28 23:51:33,508 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-28 23:51:33,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 24 places, 23 transitions, 50 flow [2023-11-28 23:51:33,571 INFO L124 PetriNetUnfolderBase]: 2/30 cut-off events. [2023-11-28 23:51:33,572 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-28 23:51:33,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34 conditions, 30 events. 2/30 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 61 event pairs, 0 based on Foata normal form. 0/19 useless extension candidates. Maximal degree in co-relation 20. Up to 2 conditions per place. [2023-11-28 23:51:33,575 INFO L82 GeneralOperation]: Start removeDead. Operand has 24 places, 23 transitions, 50 flow [2023-11-28 23:51:33,579 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 24 places, 23 transitions, 50 flow [2023-11-28 23:51:33,588 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-28 23:51:33,593 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;@179e8502, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-28 23:51:33,593 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-28 23:51:33,597 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-28 23:51:33,597 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-11-28 23:51:33,598 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-28 23:51:33,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:51:33,599 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-28 23:51:33,599 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2023-11-28 23:51:33,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:51:33,604 INFO L85 PathProgramCache]: Analyzing trace with hash 165297, now seen corresponding path program 1 times [2023-11-28 23:51:33,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:51:33,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441702195] [2023-11-28 23:51:33,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:51:33,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:51:33,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:51:33,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:51:33,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:51:33,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441702195] [2023-11-28 23:51:33,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441702195] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:51:33,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:51:33,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-28 23:51:33,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15922695] [2023-11-28 23:51:33,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:51:33,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 23:51:33,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:51:33,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 23:51:33,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 23:51:33,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 23 [2023-11-28 23:51:33,892 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 23 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:51:33,892 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 23:51:33,892 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 23 [2023-11-28 23:51:33,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 23:51:33,934 INFO L124 PetriNetUnfolderBase]: 15/60 cut-off events. [2023-11-28 23:51:33,934 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-28 23:51:33,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107 conditions, 60 events. 15/60 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 180 event pairs, 15 based on Foata normal form. 8/67 useless extension candidates. Maximal degree in co-relation 91. Up to 42 conditions per place. [2023-11-28 23:51:33,937 INFO L140 encePairwiseOnDemand]: 18/23 looper letters, 9 selfloop transitions, 1 changer transitions 0/16 dead transitions. [2023-11-28 23:51:33,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 16 transitions, 56 flow [2023-11-28 23:51:33,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 23:51:33,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-28 23:51:33,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 35 transitions. [2023-11-28 23:51:33,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5072463768115942 [2023-11-28 23:51:33,955 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 35 transitions. [2023-11-28 23:51:33,955 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 35 transitions. [2023-11-28 23:51:33,957 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 23:51:33,959 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 35 transitions. [2023-11-28 23:51:33,962 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:51:33,966 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:51:33,966 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:51:33,970 INFO L175 Difference]: Start difference. First operand has 24 places, 23 transitions, 50 flow. Second operand 3 states and 35 transitions. [2023-11-28 23:51:33,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 16 transitions, 56 flow [2023-11-28 23:51:33,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 16 transitions, 56 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-28 23:51:33,975 INFO L231 Difference]: Finished difference. Result has 21 places, 16 transitions, 38 flow [2023-11-28 23:51:33,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=36, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=38, PETRI_PLACES=21, PETRI_TRANSITIONS=16} [2023-11-28 23:51:33,982 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, -3 predicate places. [2023-11-28 23:51:33,982 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 16 transitions, 38 flow [2023-11-28 23:51:33,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:51:33,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:51:33,983 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-28 23:51:33,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-28 23:51:33,984 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2023-11-28 23:51:33,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:51:33,985 INFO L85 PathProgramCache]: Analyzing trace with hash 165298, now seen corresponding path program 1 times [2023-11-28 23:51:33,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:51:33,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069669732] [2023-11-28 23:51:33,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:51:33,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:51:34,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:51:34,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:51:34,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:51:34,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069669732] [2023-11-28 23:51:34,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069669732] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:51:34,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:51:34,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-28 23:51:34,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061571080] [2023-11-28 23:51:34,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:51:34,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 23:51:34,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:51:34,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 23:51:34,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 23:51:34,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 23 [2023-11-28 23:51:34,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 16 transitions, 38 flow. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:51:34,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 23:51:34,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 23 [2023-11-28 23:51:34,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 23:51:34,164 INFO L124 PetriNetUnfolderBase]: 10/45 cut-off events. [2023-11-28 23:51:34,164 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-28 23:51:34,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82 conditions, 45 events. 10/45 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 119 event pairs, 10 based on Foata normal form. 7/51 useless extension candidates. Maximal degree in co-relation 75. Up to 30 conditions per place. [2023-11-28 23:51:34,165 INFO L140 encePairwiseOnDemand]: 21/23 looper letters, 8 selfloop transitions, 1 changer transitions 0/15 dead transitions. [2023-11-28 23:51:34,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 15 transitions, 54 flow [2023-11-28 23:51:34,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 23:51:34,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-28 23:51:34,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 34 transitions. [2023-11-28 23:51:34,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4927536231884058 [2023-11-28 23:51:34,167 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 34 transitions. [2023-11-28 23:51:34,168 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 34 transitions. [2023-11-28 23:51:34,168 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 23:51:34,168 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 34 transitions. [2023-11-28 23:51:34,169 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:51:34,170 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:51:34,170 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:51:34,170 INFO L175 Difference]: Start difference. First operand has 21 places, 16 transitions, 38 flow. Second operand 3 states and 34 transitions. [2023-11-28 23:51:34,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 15 transitions, 54 flow [2023-11-28 23:51:34,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 15 transitions, 53 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-28 23:51:34,185 INFO L231 Difference]: Finished difference. Result has 21 places, 15 transitions, 37 flow [2023-11-28 23:51:34,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=35, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=37, PETRI_PLACES=21, PETRI_TRANSITIONS=15} [2023-11-28 23:51:34,186 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, -3 predicate places. [2023-11-28 23:51:34,187 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 15 transitions, 37 flow [2023-11-28 23:51:34,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:51:34,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:51:34,187 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1] [2023-11-28 23:51:34,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-28 23:51:34,188 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2023-11-28 23:51:34,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:51:34,189 INFO L85 PathProgramCache]: Analyzing trace with hash -624763841, now seen corresponding path program 1 times [2023-11-28 23:51:34,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:51:34,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446335075] [2023-11-28 23:51:34,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:51:34,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:51:34,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-28 23:51:34,214 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-28 23:51:34,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-28 23:51:34,245 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-28 23:51:34,245 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-28 23:51:34,246 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-11-28 23:51:34,248 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (4 of 6 remaining) [2023-11-28 23:51:34,248 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 6 remaining) [2023-11-28 23:51:34,249 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 6 remaining) [2023-11-28 23:51:34,249 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (1 of 6 remaining) [2023-11-28 23:51:34,249 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 6 remaining) [2023-11-28 23:51:34,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-28 23:51:34,249 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-28 23:51:34,252 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-28 23:51:34,252 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-28 23:51:34,267 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-28 23:51:34,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 37 places, 36 transitions, 82 flow [2023-11-28 23:51:34,280 INFO L124 PetriNetUnfolderBase]: 4/51 cut-off events. [2023-11-28 23:51:34,280 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-28 23:51:34,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59 conditions, 51 events. 4/51 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 133 event pairs, 0 based on Foata normal form. 0/33 useless extension candidates. Maximal degree in co-relation 33. Up to 3 conditions per place. [2023-11-28 23:51:34,282 INFO L82 GeneralOperation]: Start removeDead. Operand has 37 places, 36 transitions, 82 flow [2023-11-28 23:51:34,283 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 37 places, 36 transitions, 82 flow [2023-11-28 23:51:34,284 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-28 23:51:34,286 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;@179e8502, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-28 23:51:34,286 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-28 23:51:34,288 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-28 23:51:34,289 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-11-28 23:51:34,289 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-28 23:51:34,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:51:34,289 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-28 23:51:34,289 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-28 23:51:34,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:51:34,290 INFO L85 PathProgramCache]: Analyzing trace with hash 201045, now seen corresponding path program 1 times [2023-11-28 23:51:34,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:51:34,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946857978] [2023-11-28 23:51:34,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:51:34,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:51:34,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:51:34,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:51:34,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:51:34,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946857978] [2023-11-28 23:51:34,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946857978] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:51:34,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:51:34,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-28 23:51:34,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104363996] [2023-11-28 23:51:34,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:51:34,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 23:51:34,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:51:34,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 23:51:34,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 23:51:34,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 36 [2023-11-28 23:51:34,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 36 transitions, 82 flow. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:51:34,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 23:51:34,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 36 [2023-11-28 23:51:34,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 23:51:34,464 INFO L124 PetriNetUnfolderBase]: 225/520 cut-off events. [2023-11-28 23:51:34,464 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2023-11-28 23:51:34,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 940 conditions, 520 events. 225/520 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2831 event pairs, 225 based on Foata normal form. 104/618 useless extension candidates. Maximal degree in co-relation 292. Up to 396 conditions per place. [2023-11-28 23:51:34,470 INFO L140 encePairwiseOnDemand]: 29/36 looper letters, 15 selfloop transitions, 1 changer transitions 0/26 dead transitions. [2023-11-28 23:51:34,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 26 transitions, 94 flow [2023-11-28 23:51:34,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 23:51:34,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-28 23:51:34,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 55 transitions. [2023-11-28 23:51:34,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5092592592592593 [2023-11-28 23:51:34,473 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 55 transitions. [2023-11-28 23:51:34,473 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 55 transitions. [2023-11-28 23:51:34,473 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 23:51:34,473 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 55 transitions. [2023-11-28 23:51:34,474 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:51:34,474 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:51:34,474 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:51:34,475 INFO L175 Difference]: Start difference. First operand has 37 places, 36 transitions, 82 flow. Second operand 3 states and 55 transitions. [2023-11-28 23:51:34,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 26 transitions, 94 flow [2023-11-28 23:51:34,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 26 transitions, 94 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-28 23:51:34,477 INFO L231 Difference]: Finished difference. Result has 33 places, 26 transitions, 64 flow [2023-11-28 23:51:34,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=64, PETRI_PLACES=33, PETRI_TRANSITIONS=26} [2023-11-28 23:51:34,478 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, -4 predicate places. [2023-11-28 23:51:34,478 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 26 transitions, 64 flow [2023-11-28 23:51:34,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:51:34,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:51:34,479 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-28 23:51:34,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-28 23:51:34,479 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-28 23:51:34,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:51:34,480 INFO L85 PathProgramCache]: Analyzing trace with hash 201046, now seen corresponding path program 1 times [2023-11-28 23:51:34,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:51:34,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516183428] [2023-11-28 23:51:34,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:51:34,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:51:34,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:51:34,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:51:34,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:51:34,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516183428] [2023-11-28 23:51:34,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516183428] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:51:34,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:51:34,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-28 23:51:34,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993349927] [2023-11-28 23:51:34,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:51:34,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 23:51:34,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:51:34,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 23:51:34,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 23:51:34,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 36 [2023-11-28 23:51:34,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 26 transitions, 64 flow. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:51:34,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 23:51:34,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 36 [2023-11-28 23:51:34,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 23:51:34,618 INFO L124 PetriNetUnfolderBase]: 160/383 cut-off events. [2023-11-28 23:51:34,618 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2023-11-28 23:51:34,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 697 conditions, 383 events. 160/383 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1934 event pairs, 160 based on Foata normal form. 43/423 useless extension candidates. Maximal degree in co-relation 689. Up to 288 conditions per place. [2023-11-28 23:51:34,623 INFO L140 encePairwiseOnDemand]: 34/36 looper letters, 14 selfloop transitions, 1 changer transitions 0/25 dead transitions. [2023-11-28 23:51:34,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 25 transitions, 92 flow [2023-11-28 23:51:34,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 23:51:34,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-28 23:51:34,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 52 transitions. [2023-11-28 23:51:34,624 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48148148148148145 [2023-11-28 23:51:34,625 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 52 transitions. [2023-11-28 23:51:34,625 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 52 transitions. [2023-11-28 23:51:34,625 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 23:51:34,625 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 52 transitions. [2023-11-28 23:51:34,626 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:51:34,627 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:51:34,627 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:51:34,627 INFO L175 Difference]: Start difference. First operand has 33 places, 26 transitions, 64 flow. Second operand 3 states and 52 transitions. [2023-11-28 23:51:34,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 25 transitions, 92 flow [2023-11-28 23:51:34,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 25 transitions, 91 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-28 23:51:34,629 INFO L231 Difference]: Finished difference. Result has 33 places, 25 transitions, 63 flow [2023-11-28 23:51:34,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=61, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=63, PETRI_PLACES=33, PETRI_TRANSITIONS=25} [2023-11-28 23:51:34,631 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, -4 predicate places. [2023-11-28 23:51:34,631 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 25 transitions, 63 flow [2023-11-28 23:51:34,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:51:34,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:51:34,632 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:51:34,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-28 23:51:34,632 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-28 23:51:34,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:51:34,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1691272411, now seen corresponding path program 1 times [2023-11-28 23:51:34,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:51:34,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881019855] [2023-11-28 23:51:34,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:51:34,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:51:34,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:51:34,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:51:34,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:51:34,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881019855] [2023-11-28 23:51:34,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881019855] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:51:34,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:51:34,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 23:51:34,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994353038] [2023-11-28 23:51:34,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:51:34,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 23:51:34,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:51:34,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 23:51:34,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 23:51:34,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 36 [2023-11-28 23:51:34,686 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 25 transitions, 63 flow. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:51:34,686 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 23:51:34,686 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 36 [2023-11-28 23:51:34,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 23:51:34,739 INFO L124 PetriNetUnfolderBase]: 108/238 cut-off events. [2023-11-28 23:51:34,739 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2023-11-28 23:51:34,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 462 conditions, 238 events. 108/238 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 955 event pairs, 108 based on Foata normal form. 33/268 useless extension candidates. Maximal degree in co-relation 453. Up to 200 conditions per place. [2023-11-28 23:51:34,741 INFO L140 encePairwiseOnDemand]: 33/36 looper letters, 12 selfloop transitions, 1 changer transitions 0/19 dead transitions. [2023-11-28 23:51:34,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 19 transitions, 77 flow [2023-11-28 23:51:34,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 23:51:34,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-28 23:51:34,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 54 transitions. [2023-11-28 23:51:34,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2023-11-28 23:51:34,743 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 54 transitions. [2023-11-28 23:51:34,743 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 54 transitions. [2023-11-28 23:51:34,744 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 23:51:34,744 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 54 transitions. [2023-11-28 23:51:34,744 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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) [2023-11-28 23:51:34,745 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:51:34,746 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:51:34,746 INFO L175 Difference]: Start difference. First operand has 33 places, 25 transitions, 63 flow. Second operand 3 states and 54 transitions. [2023-11-28 23:51:34,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 19 transitions, 77 flow [2023-11-28 23:51:34,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 19 transitions, 76 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-28 23:51:34,747 INFO L231 Difference]: Finished difference. Result has 28 places, 19 transitions, 52 flow [2023-11-28 23:51:34,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=52, PETRI_PLACES=28, PETRI_TRANSITIONS=19} [2023-11-28 23:51:34,748 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, -9 predicate places. [2023-11-28 23:51:34,749 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 19 transitions, 52 flow [2023-11-28 23:51:34,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:51:34,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:51:34,749 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1] [2023-11-28 23:51:34,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-28 23:51:34,750 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-28 23:51:34,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:51:34,750 INFO L85 PathProgramCache]: Analyzing trace with hash 1111336123, now seen corresponding path program 1 times [2023-11-28 23:51:34,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:51:34,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798135330] [2023-11-28 23:51:34,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:51:34,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:51:34,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-28 23:51:34,767 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-28 23:51:34,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-28 23:51:34,781 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-28 23:51:34,781 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-28 23:51:34,782 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-11-28 23:51:34,782 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (5 of 7 remaining) [2023-11-28 23:51:34,782 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2023-11-28 23:51:34,782 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2023-11-28 23:51:34,782 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (2 of 7 remaining) [2023-11-28 23:51:34,783 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2023-11-28 23:51:34,783 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2023-11-28 23:51:34,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-28 23:51:34,783 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-11-28 23:51:34,784 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-28 23:51:34,784 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-28 23:51:34,801 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-28 23:51:34,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 50 places, 49 transitions, 116 flow [2023-11-28 23:51:34,811 INFO L124 PetriNetUnfolderBase]: 6/72 cut-off events. [2023-11-28 23:51:34,811 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-28 23:51:34,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85 conditions, 72 events. 6/72 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 195 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 58. Up to 4 conditions per place. [2023-11-28 23:51:34,812 INFO L82 GeneralOperation]: Start removeDead. Operand has 50 places, 49 transitions, 116 flow [2023-11-28 23:51:34,813 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 50 places, 49 transitions, 116 flow [2023-11-28 23:51:34,814 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-28 23:51:34,815 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;@179e8502, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-28 23:51:34,815 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-11-28 23:51:34,817 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-28 23:51:34,817 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-11-28 23:51:34,817 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-28 23:51:34,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:51:34,818 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-28 23:51:34,818 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-28 23:51:34,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:51:34,818 INFO L85 PathProgramCache]: Analyzing trace with hash 249702, now seen corresponding path program 1 times [2023-11-28 23:51:34,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:51:34,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481750353] [2023-11-28 23:51:34,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:51:34,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:51:34,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:51:34,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:51:34,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:51:34,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481750353] [2023-11-28 23:51:34,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481750353] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:51:34,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:51:34,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-28 23:51:34,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192531144] [2023-11-28 23:51:34,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:51:34,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 23:51:34,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:51:34,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 23:51:34,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 23:51:34,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 49 [2023-11-28 23:51:34,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 49 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:51:34,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 23:51:34,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 49 [2023-11-28 23:51:34,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 23:51:35,271 INFO L124 PetriNetUnfolderBase]: 2205/4004 cut-off events. [2023-11-28 23:51:35,272 INFO L125 PetriNetUnfolderBase]: For 350/350 co-relation queries the response was YES. [2023-11-28 23:51:35,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7413 conditions, 4004 events. 2205/4004 cut-off events. For 350/350 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 27557 event pairs, 2205 based on Foata normal form. 968/4929 useless extension candidates. Maximal degree in co-relation 943. Up to 3240 conditions per place. [2023-11-28 23:51:35,299 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 21 selfloop transitions, 1 changer transitions 0/36 dead transitions. [2023-11-28 23:51:35,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 36 transitions, 134 flow [2023-11-28 23:51:35,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 23:51:35,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-28 23:51:35,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 75 transitions. [2023-11-28 23:51:35,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5102040816326531 [2023-11-28 23:51:35,301 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 75 transitions. [2023-11-28 23:51:35,302 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 75 transitions. [2023-11-28 23:51:35,302 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 23:51:35,302 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 75 transitions. [2023-11-28 23:51:35,303 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:51:35,303 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 49.0) internal successors, (196), 4 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:51:35,304 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 49.0) internal successors, (196), 4 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:51:35,304 INFO L175 Difference]: Start difference. First operand has 50 places, 49 transitions, 116 flow. Second operand 3 states and 75 transitions. [2023-11-28 23:51:35,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 36 transitions, 134 flow [2023-11-28 23:51:35,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 36 transitions, 132 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-11-28 23:51:35,307 INFO L231 Difference]: Finished difference. Result has 45 places, 36 transitions, 90 flow [2023-11-28 23:51:35,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=45, PETRI_TRANSITIONS=36} [2023-11-28 23:51:35,308 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -5 predicate places. [2023-11-28 23:51:35,308 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 36 transitions, 90 flow [2023-11-28 23:51:35,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:51:35,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:51:35,309 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-28 23:51:35,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-28 23:51:35,309 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-28 23:51:35,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:51:35,310 INFO L85 PathProgramCache]: Analyzing trace with hash 249703, now seen corresponding path program 1 times [2023-11-28 23:51:35,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:51:35,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126412345] [2023-11-28 23:51:35,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:51:35,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:51:35,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:51:35,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:51:35,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:51:35,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126412345] [2023-11-28 23:51:35,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126412345] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:51:35,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:51:35,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-28 23:51:35,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246715053] [2023-11-28 23:51:35,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:51:35,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 23:51:35,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:51:35,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 23:51:35,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 23:51:35,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 49 [2023-11-28 23:51:35,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 36 transitions, 90 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) [2023-11-28 23:51:35,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 23:51:35,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 49 [2023-11-28 23:51:35,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 23:51:35,595 INFO L124 PetriNetUnfolderBase]: 1600/2955 cut-off events. [2023-11-28 23:51:35,595 INFO L125 PetriNetUnfolderBase]: For 151/151 co-relation queries the response was YES. [2023-11-28 23:51:35,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5466 conditions, 2955 events. 1600/2955 cut-off events. For 151/151 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 19565 event pairs, 1600 based on Foata normal form. 259/3202 useless extension candidates. Maximal degree in co-relation 5457. Up to 2376 conditions per place. [2023-11-28 23:51:35,613 INFO L140 encePairwiseOnDemand]: 47/49 looper letters, 20 selfloop transitions, 1 changer transitions 0/35 dead transitions. [2023-11-28 23:51:35,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 35 transitions, 130 flow [2023-11-28 23:51:35,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 23:51:35,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-28 23:51:35,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 70 transitions. [2023-11-28 23:51:35,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2023-11-28 23:51:35,615 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 70 transitions. [2023-11-28 23:51:35,615 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 70 transitions. [2023-11-28 23:51:35,616 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 23:51:35,616 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 70 transitions. [2023-11-28 23:51:35,616 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:51:35,617 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 49.0) internal successors, (196), 4 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:51:35,618 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 49.0) internal successors, (196), 4 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:51:35,618 INFO L175 Difference]: Start difference. First operand has 45 places, 36 transitions, 90 flow. Second operand 3 states and 70 transitions. [2023-11-28 23:51:35,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 35 transitions, 130 flow [2023-11-28 23:51:35,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 35 transitions, 129 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-28 23:51:35,620 INFO L231 Difference]: Finished difference. Result has 45 places, 35 transitions, 89 flow [2023-11-28 23:51:35,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=89, PETRI_PLACES=45, PETRI_TRANSITIONS=35} [2023-11-28 23:51:35,621 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -5 predicate places. [2023-11-28 23:51:35,621 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 35 transitions, 89 flow [2023-11-28 23:51:35,621 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) [2023-11-28 23:51:35,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:51:35,621 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:51:35,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-28 23:51:35,622 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-28 23:51:35,622 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:51:35,622 INFO L85 PathProgramCache]: Analyzing trace with hash 1532189319, now seen corresponding path program 1 times [2023-11-28 23:51:35,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:51:35,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341427257] [2023-11-28 23:51:35,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:51:35,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:51:35,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:51:35,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:51:35,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:51:35,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341427257] [2023-11-28 23:51:35,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341427257] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:51:35,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:51:35,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 23:51:35,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120609840] [2023-11-28 23:51:35,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:51:35,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 23:51:35,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:51:35,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 23:51:35,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 23:51:35,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2023-11-28 23:51:35,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 35 transitions, 89 flow. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:51:35,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 23:51:35,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2023-11-28 23:51:35,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 23:51:35,830 INFO L124 PetriNetUnfolderBase]: 908/1546 cut-off events. [2023-11-28 23:51:35,831 INFO L125 PetriNetUnfolderBase]: For 115/115 co-relation queries the response was YES. [2023-11-28 23:51:35,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3021 conditions, 1546 events. 908/1546 cut-off events. For 115/115 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 8252 event pairs, 908 based on Foata normal form. 258/1792 useless extension candidates. Maximal degree in co-relation 3011. Up to 1375 conditions per place. [2023-11-28 23:51:35,839 INFO L140 encePairwiseOnDemand]: 45/49 looper letters, 17 selfloop transitions, 1 changer transitions 0/26 dead transitions. [2023-11-28 23:51:35,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 26 transitions, 107 flow [2023-11-28 23:51:35,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 23:51:35,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-28 23:51:35,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 72 transitions. [2023-11-28 23:51:35,841 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4897959183673469 [2023-11-28 23:51:35,841 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 72 transitions. [2023-11-28 23:51:35,841 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 72 transitions. [2023-11-28 23:51:35,841 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 23:51:35,841 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 72 transitions. [2023-11-28 23:51:35,842 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:51:35,843 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 49.0) internal successors, (196), 4 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:51:35,843 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 49.0) internal successors, (196), 4 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:51:35,843 INFO L175 Difference]: Start difference. First operand has 45 places, 35 transitions, 89 flow. Second operand 3 states and 72 transitions. [2023-11-28 23:51:35,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 26 transitions, 107 flow [2023-11-28 23:51:35,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 26 transitions, 106 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-28 23:51:35,845 INFO L231 Difference]: Finished difference. Result has 37 places, 26 transitions, 72 flow [2023-11-28 23:51:35,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=72, PETRI_PLACES=37, PETRI_TRANSITIONS=26} [2023-11-28 23:51:35,845 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -13 predicate places. [2023-11-28 23:51:35,846 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 26 transitions, 72 flow [2023-11-28 23:51:35,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:51:35,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:51:35,846 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1] [2023-11-28 23:51:35,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-28 23:51:35,846 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-28 23:51:35,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:51:35,847 INFO L85 PathProgramCache]: Analyzing trace with hash -964611120, now seen corresponding path program 1 times [2023-11-28 23:51:35,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:51:35,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565422949] [2023-11-28 23:51:35,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:51:35,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:51:35,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-28 23:51:35,861 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-28 23:51:35,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-28 23:51:35,875 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-28 23:51:35,875 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-28 23:51:35,875 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 8 remaining) [2023-11-28 23:51:35,875 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (6 of 8 remaining) [2023-11-28 23:51:35,876 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 8 remaining) [2023-11-28 23:51:35,876 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 8 remaining) [2023-11-28 23:51:35,876 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (3 of 8 remaining) [2023-11-28 23:51:35,876 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (2 of 8 remaining) [2023-11-28 23:51:35,876 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (1 of 8 remaining) [2023-11-28 23:51:35,876 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 8 remaining) [2023-11-28 23:51:35,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-28 23:51:35,876 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-11-28 23:51:35,877 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-28 23:51:35,877 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-28 23:51:35,897 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-28 23:51:35,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 63 places, 62 transitions, 152 flow [2023-11-28 23:51:35,907 INFO L124 PetriNetUnfolderBase]: 8/93 cut-off events. [2023-11-28 23:51:35,907 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-28 23:51:35,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112 conditions, 93 events. 8/93 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 264 event pairs, 0 based on Foata normal form. 0/61 useless extension candidates. Maximal degree in co-relation 84. Up to 5 conditions per place. [2023-11-28 23:51:35,908 INFO L82 GeneralOperation]: Start removeDead. Operand has 63 places, 62 transitions, 152 flow [2023-11-28 23:51:35,909 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 63 places, 62 transitions, 152 flow [2023-11-28 23:51:35,910 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-28 23:51:35,910 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;@179e8502, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-28 23:51:35,911 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2023-11-28 23:51:35,912 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-28 23:51:35,912 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-11-28 23:51:35,912 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-28 23:51:35,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:51:35,912 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-28 23:51:35,912 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-28 23:51:35,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:51:35,913 INFO L85 PathProgramCache]: Analyzing trace with hash 311268, now seen corresponding path program 1 times [2023-11-28 23:51:35,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:51:35,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121566404] [2023-11-28 23:51:35,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:51:35,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:51:35,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:51:35,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:51:35,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:51:35,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121566404] [2023-11-28 23:51:35,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121566404] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:51:35,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:51:35,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-28 23:51:35,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412418672] [2023-11-28 23:51:35,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:51:35,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 23:51:35,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:51:35,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 23:51:35,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 23:51:35,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 62 [2023-11-28 23:51:35,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 62 transitions, 152 flow. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:51:35,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 23:51:35,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 62 [2023-11-28 23:51:35,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 23:51:38,514 INFO L124 PetriNetUnfolderBase]: 18405/29228 cut-off events. [2023-11-28 23:51:38,514 INFO L125 PetriNetUnfolderBase]: For 3902/3902 co-relation queries the response was YES. [2023-11-28 23:51:38,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55102 conditions, 29228 events. 18405/29228 cut-off events. For 3902/3902 co-relation queries the response was YES. Maximal size of possible extension queue 1317. Compared 227556 event pairs, 18405 based on Foata normal form. 7880/36849 useless extension candidates. Maximal degree in co-relation 7451. Up to 24624 conditions per place. [2023-11-28 23:51:38,705 INFO L140 encePairwiseOnDemand]: 51/62 looper letters, 27 selfloop transitions, 1 changer transitions 0/46 dead transitions. [2023-11-28 23:51:38,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 46 transitions, 176 flow [2023-11-28 23:51:38,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 23:51:38,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-28 23:51:38,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 95 transitions. [2023-11-28 23:51:38,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.510752688172043 [2023-11-28 23:51:38,707 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 95 transitions. [2023-11-28 23:51:38,707 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 95 transitions. [2023-11-28 23:51:38,708 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 23:51:38,708 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 95 transitions. [2023-11-28 23:51:38,709 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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) [2023-11-28 23:51:38,710 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 62.0) internal successors, (248), 4 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:51:38,710 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 62.0) internal successors, (248), 4 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:51:38,710 INFO L175 Difference]: Start difference. First operand has 63 places, 62 transitions, 152 flow. Second operand 3 states and 95 transitions. [2023-11-28 23:51:38,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 46 transitions, 176 flow [2023-11-28 23:51:38,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 46 transitions, 170 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-11-28 23:51:38,717 INFO L231 Difference]: Finished difference. Result has 57 places, 46 transitions, 116 flow [2023-11-28 23:51:38,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=116, PETRI_PLACES=57, PETRI_TRANSITIONS=46} [2023-11-28 23:51:38,717 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -6 predicate places. [2023-11-28 23:51:38,718 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 46 transitions, 116 flow [2023-11-28 23:51:38,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:51:38,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:51:38,718 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-28 23:51:38,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-28 23:51:38,719 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-28 23:51:38,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:51:38,719 INFO L85 PathProgramCache]: Analyzing trace with hash 311269, now seen corresponding path program 1 times [2023-11-28 23:51:38,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:51:38,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863405918] [2023-11-28 23:51:38,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:51:38,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:51:38,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:51:38,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:51:38,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:51:38,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863405918] [2023-11-28 23:51:38,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863405918] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:51:38,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:51:38,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-28 23:51:38,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690880731] [2023-11-28 23:51:38,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:51:38,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 23:51:38,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:51:38,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 23:51:38,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 23:51:38,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 62 [2023-11-28 23:51:38,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 46 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:51:38,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 23:51:38,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 62 [2023-11-28 23:51:38,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 23:51:40,364 INFO L124 PetriNetUnfolderBase]: 13480/21635 cut-off events. [2023-11-28 23:51:40,364 INFO L125 PetriNetUnfolderBase]: For 871/871 co-relation queries the response was YES. [2023-11-28 23:51:40,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40563 conditions, 21635 events. 13480/21635 cut-off events. For 871/871 co-relation queries the response was YES. Maximal size of possible extension queue 994. Compared 164418 event pairs, 13480 based on Foata normal form. 1555/23158 useless extension candidates. Maximal degree in co-relation 40553. Up to 18144 conditions per place. [2023-11-28 23:51:40,497 INFO L140 encePairwiseOnDemand]: 60/62 looper letters, 26 selfloop transitions, 1 changer transitions 0/45 dead transitions. [2023-11-28 23:51:40,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 45 transitions, 168 flow [2023-11-28 23:51:40,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 23:51:40,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-28 23:51:40,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 88 transitions. [2023-11-28 23:51:40,499 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4731182795698925 [2023-11-28 23:51:40,499 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 88 transitions. [2023-11-28 23:51:40,499 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 88 transitions. [2023-11-28 23:51:40,499 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 23:51:40,499 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 88 transitions. [2023-11-28 23:51:40,500 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:51:40,501 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 62.0) internal successors, (248), 4 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:51:40,501 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 62.0) internal successors, (248), 4 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:51:40,501 INFO L175 Difference]: Start difference. First operand has 57 places, 46 transitions, 116 flow. Second operand 3 states and 88 transitions. [2023-11-28 23:51:40,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 45 transitions, 168 flow [2023-11-28 23:51:40,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 45 transitions, 167 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-28 23:51:40,503 INFO L231 Difference]: Finished difference. Result has 57 places, 45 transitions, 115 flow [2023-11-28 23:51:40,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=115, PETRI_PLACES=57, PETRI_TRANSITIONS=45} [2023-11-28 23:51:40,504 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -6 predicate places. [2023-11-28 23:51:40,505 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 45 transitions, 115 flow [2023-11-28 23:51:40,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:51:40,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:51:40,505 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:51:40,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-28 23:51:40,505 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-28 23:51:40,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:51:40,506 INFO L85 PathProgramCache]: Analyzing trace with hash 1665256659, now seen corresponding path program 1 times [2023-11-28 23:51:40,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:51:40,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879235467] [2023-11-28 23:51:40,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:51:40,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:51:40,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:51:40,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:51:40,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:51:40,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879235467] [2023-11-28 23:51:40,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879235467] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:51:40,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:51:40,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 23:51:40,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607345923] [2023-11-28 23:51:40,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:51:40,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 23:51:40,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:51:40,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 23:51:40,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 23:51:40,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 62 [2023-11-28 23:51:40,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 45 transitions, 115 flow. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:51:40,557 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 23:51:40,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 62 [2023-11-28 23:51:40,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 23:51:41,409 INFO L124 PetriNetUnfolderBase]: 6408/9562 cut-off events. [2023-11-28 23:51:41,409 INFO L125 PetriNetUnfolderBase]: For 562/562 co-relation queries the response was YES. [2023-11-28 23:51:41,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18788 conditions, 9562 events. 6408/9562 cut-off events. For 562/562 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 58371 event pairs, 6408 based on Foata normal form. 1758/11288 useless extension candidates. Maximal degree in co-relation 18777. Up to 8750 conditions per place. [2023-11-28 23:51:41,457 INFO L140 encePairwiseOnDemand]: 57/62 looper letters, 22 selfloop transitions, 1 changer transitions 0/33 dead transitions. [2023-11-28 23:51:41,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 33 transitions, 137 flow [2023-11-28 23:51:41,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 23:51:41,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-28 23:51:41,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 90 transitions. [2023-11-28 23:51:41,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4838709677419355 [2023-11-28 23:51:41,458 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 90 transitions. [2023-11-28 23:51:41,458 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 90 transitions. [2023-11-28 23:51:41,459 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 23:51:41,459 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 90 transitions. [2023-11-28 23:51:41,459 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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) [2023-11-28 23:51:41,460 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 62.0) internal successors, (248), 4 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:51:41,460 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 62.0) internal successors, (248), 4 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:51:41,460 INFO L175 Difference]: Start difference. First operand has 57 places, 45 transitions, 115 flow. Second operand 3 states and 90 transitions. [2023-11-28 23:51:41,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 33 transitions, 137 flow [2023-11-28 23:51:41,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 33 transitions, 136 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-28 23:51:41,462 INFO L231 Difference]: Finished difference. Result has 46 places, 33 transitions, 92 flow [2023-11-28 23:51:41,462 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=92, PETRI_PLACES=46, PETRI_TRANSITIONS=33} [2023-11-28 23:51:41,462 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -17 predicate places. [2023-11-28 23:51:41,463 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 33 transitions, 92 flow [2023-11-28 23:51:41,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:51:41,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:51:41,463 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1] [2023-11-28 23:51:41,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-28 23:51:41,463 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-28 23:51:41,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:51:41,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1343127362, now seen corresponding path program 1 times [2023-11-28 23:51:41,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:51:41,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521230963] [2023-11-28 23:51:41,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:51:41,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:51:41,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-28 23:51:41,482 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-28 23:51:41,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-28 23:51:41,496 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-28 23:51:41,496 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-28 23:51:41,496 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 9 remaining) [2023-11-28 23:51:41,497 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (7 of 9 remaining) [2023-11-28 23:51:41,497 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 9 remaining) [2023-11-28 23:51:41,497 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 9 remaining) [2023-11-28 23:51:41,497 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (4 of 9 remaining) [2023-11-28 23:51:41,497 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (3 of 9 remaining) [2023-11-28 23:51:41,498 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (2 of 9 remaining) [2023-11-28 23:51:41,498 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (1 of 9 remaining) [2023-11-28 23:51:41,498 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 9 remaining) [2023-11-28 23:51:41,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-28 23:51:41,498 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-11-28 23:51:41,499 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-28 23:51:41,499 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-11-28 23:51:41,524 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-28 23:51:41,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 76 places, 75 transitions, 190 flow [2023-11-28 23:51:41,618 INFO L124 PetriNetUnfolderBase]: 10/114 cut-off events. [2023-11-28 23:51:41,618 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-11-28 23:51:41,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140 conditions, 114 events. 10/114 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 335 event pairs, 0 based on Foata normal form. 0/75 useless extension candidates. Maximal degree in co-relation 111. Up to 6 conditions per place. [2023-11-28 23:51:41,619 INFO L82 GeneralOperation]: Start removeDead. Operand has 76 places, 75 transitions, 190 flow [2023-11-28 23:51:41,620 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 76 places, 75 transitions, 190 flow [2023-11-28 23:51:41,621 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-28 23:51:41,622 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;@179e8502, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-28 23:51:41,622 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2023-11-28 23:51:41,623 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-28 23:51:41,623 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-11-28 23:51:41,623 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-28 23:51:41,623 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:51:41,623 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-28 23:51:41,624 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-11-28 23:51:41,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:51:41,624 INFO L85 PathProgramCache]: Analyzing trace with hash 385743, now seen corresponding path program 1 times [2023-11-28 23:51:41,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:51:41,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43587481] [2023-11-28 23:51:41,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:51:41,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:51:41,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:51:41,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:51:41,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:51:41,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43587481] [2023-11-28 23:51:41,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43587481] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:51:41,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:51:41,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-28 23:51:41,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6765241] [2023-11-28 23:51:41,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:51:41,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 23:51:41,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:51:41,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 23:51:41,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 23:51:41,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 75 [2023-11-28 23:51:41,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 75 transitions, 190 flow. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:51:41,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 23:51:41,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 75 [2023-11-28 23:51:41,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 23:51:56,669 INFO L124 PetriNetUnfolderBase]: 141525/206492 cut-off events. [2023-11-28 23:51:56,670 INFO L125 PetriNetUnfolderBase]: For 37454/37454 co-relation queries the response was YES. [2023-11-28 23:51:57,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 394367 conditions, 206492 events. 141525/206492 cut-off events. For 37454/37454 co-relation queries the response was YES. Maximal size of possible extension queue 7430. Compared 1733163 event pairs, 141525 based on Foata normal form. 59720/264658 useless extension candidates. Maximal degree in co-relation 55355. Up to 178848 conditions per place. [2023-11-28 23:51:58,148 INFO L140 encePairwiseOnDemand]: 62/75 looper letters, 33 selfloop transitions, 1 changer transitions 0/56 dead transitions. [2023-11-28 23:51:58,148 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 56 transitions, 220 flow [2023-11-28 23:51:58,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 23:51:58,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-28 23:51:58,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 115 transitions. [2023-11-28 23:51:58,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5111111111111111 [2023-11-28 23:51:58,150 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 115 transitions. [2023-11-28 23:51:58,150 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 115 transitions. [2023-11-28 23:51:58,150 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 23:51:58,150 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 115 transitions. [2023-11-28 23:51:58,151 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) [2023-11-28 23:51:58,152 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 75.0) internal successors, (300), 4 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:51:58,152 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 75.0) internal successors, (300), 4 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:51:58,152 INFO L175 Difference]: Start difference. First operand has 76 places, 75 transitions, 190 flow. Second operand 3 states and 115 transitions. [2023-11-28 23:51:58,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 56 transitions, 220 flow [2023-11-28 23:51:58,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 56 transitions, 208 flow, removed 6 selfloop flow, removed 0 redundant places. [2023-11-28 23:51:58,172 INFO L231 Difference]: Finished difference. Result has 69 places, 56 transitions, 142 flow [2023-11-28 23:51:58,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=142, PETRI_PLACES=69, PETRI_TRANSITIONS=56} [2023-11-28 23:51:58,173 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, -7 predicate places. [2023-11-28 23:51:58,173 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 56 transitions, 142 flow [2023-11-28 23:51:58,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:51:58,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:51:58,174 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-28 23:51:58,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-28 23:51:58,174 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-11-28 23:51:58,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:51:58,174 INFO L85 PathProgramCache]: Analyzing trace with hash 385744, now seen corresponding path program 1 times [2023-11-28 23:51:58,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:51:58,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168603373] [2023-11-28 23:51:58,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:51:58,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:51:58,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:51:58,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:51:58,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:51:58,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168603373] [2023-11-28 23:51:58,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168603373] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:51:58,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:51:58,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-28 23:51:58,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685591961] [2023-11-28 23:51:58,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:51:58,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 23:51:58,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:51:58,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 23:51:58,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 23:51:58,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 75 [2023-11-28 23:51:58,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 56 transitions, 142 flow. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:51:58,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 23:51:58,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 75 [2023-11-28 23:51:58,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 23:52:08,959 INFO L124 PetriNetUnfolderBase]: 104200/153171 cut-off events. [2023-11-28 23:52:08,959 INFO L125 PetriNetUnfolderBase]: For 4983/4983 co-relation queries the response was YES. [2023-11-28 23:52:09,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 290036 conditions, 153171 events. 104200/153171 cut-off events. For 4983/4983 co-relation queries the response was YES. Maximal size of possible extension queue 5626. Compared 1267578 event pairs, 104200 based on Foata normal form. 9331/162423 useless extension candidates. Maximal degree in co-relation 290025. Up to 132192 conditions per place. [2023-11-28 23:52:09,821 INFO L140 encePairwiseOnDemand]: 73/75 looper letters, 32 selfloop transitions, 1 changer transitions 0/55 dead transitions. [2023-11-28 23:52:09,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 55 transitions, 206 flow [2023-11-28 23:52:09,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 23:52:09,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-28 23:52:09,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 106 transitions. [2023-11-28 23:52:09,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4711111111111111 [2023-11-28 23:52:09,822 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 106 transitions. [2023-11-28 23:52:09,822 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 106 transitions. [2023-11-28 23:52:09,823 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 23:52:09,823 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 106 transitions. [2023-11-28 23:52:09,823 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:52:09,824 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 75.0) internal successors, (300), 4 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:52:09,824 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 75.0) internal successors, (300), 4 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:52:09,824 INFO L175 Difference]: Start difference. First operand has 69 places, 56 transitions, 142 flow. Second operand 3 states and 106 transitions. [2023-11-28 23:52:09,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 55 transitions, 206 flow [2023-11-28 23:52:09,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 55 transitions, 205 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-28 23:52:09,828 INFO L231 Difference]: Finished difference. Result has 69 places, 55 transitions, 141 flow [2023-11-28 23:52:09,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=141, PETRI_PLACES=69, PETRI_TRANSITIONS=55} [2023-11-28 23:52:09,828 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, -7 predicate places. [2023-11-28 23:52:09,829 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 55 transitions, 141 flow [2023-11-28 23:52:09,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:52:09,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:52:09,829 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:52:09,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-28 23:52:09,829 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-11-28 23:52:09,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:52:09,830 INFO L85 PathProgramCache]: Analyzing trace with hash 1025470015, now seen corresponding path program 1 times [2023-11-28 23:52:09,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:52:09,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559045369] [2023-11-28 23:52:09,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:52:09,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:52:09,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:52:09,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:52:09,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:52:09,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559045369] [2023-11-28 23:52:09,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559045369] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:52:09,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:52:09,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 23:52:09,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843988023] [2023-11-28 23:52:09,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:52:09,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 23:52:09,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:52:09,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 23:52:09,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 23:52:09,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 75 [2023-11-28 23:52:09,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 55 transitions, 141 flow. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:52:09,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 23:52:09,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 75 [2023-11-28 23:52:09,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 23:52:13,835 INFO L124 PetriNetUnfolderBase]: 41408/57094 cut-off events. [2023-11-28 23:52:13,835 INFO L125 PetriNetUnfolderBase]: For 2661/2661 co-relation queries the response was YES. [2023-11-28 23:52:13,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112571 conditions, 57094 events. 41408/57094 cut-off events. For 2661/2661 co-relation queries the response was YES. Maximal size of possible extension queue 1890. Compared 374721 event pairs, 41408 based on Foata normal form. 11133/68148 useless extension candidates. Maximal degree in co-relation 112559. Up to 53125 conditions per place. [2023-11-28 23:52:14,105 INFO L140 encePairwiseOnDemand]: 69/75 looper letters, 27 selfloop transitions, 1 changer transitions 0/40 dead transitions. [2023-11-28 23:52:14,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 40 transitions, 167 flow [2023-11-28 23:52:14,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 23:52:14,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-28 23:52:14,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 108 transitions. [2023-11-28 23:52:14,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48 [2023-11-28 23:52:14,106 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 108 transitions. [2023-11-28 23:52:14,106 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 108 transitions. [2023-11-28 23:52:14,107 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 23:52:14,107 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 108 transitions. [2023-11-28 23:52:14,107 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:52:14,108 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 75.0) internal successors, (300), 4 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:52:14,108 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 75.0) internal successors, (300), 4 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:52:14,108 INFO L175 Difference]: Start difference. First operand has 69 places, 55 transitions, 141 flow. Second operand 3 states and 108 transitions. [2023-11-28 23:52:14,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 40 transitions, 167 flow [2023-11-28 23:52:14,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 40 transitions, 166 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-28 23:52:14,110 INFO L231 Difference]: Finished difference. Result has 55 places, 40 transitions, 112 flow [2023-11-28 23:52:14,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=55, PETRI_TRANSITIONS=40} [2023-11-28 23:52:14,110 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, -21 predicate places. [2023-11-28 23:52:14,110 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 40 transitions, 112 flow [2023-11-28 23:52:14,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:52:14,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:52:14,111 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:52:14,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-28 23:52:14,111 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-11-28 23:52:14,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:52:14,111 INFO L85 PathProgramCache]: Analyzing trace with hash -1308032315, now seen corresponding path program 1 times [2023-11-28 23:52:14,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:52:14,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178306694] [2023-11-28 23:52:14,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:52:14,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:52:14,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-28 23:52:14,319 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-28 23:52:14,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-28 23:52:14,336 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-28 23:52:14,336 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-28 23:52:14,337 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (9 of 10 remaining) [2023-11-28 23:52:14,337 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (8 of 10 remaining) [2023-11-28 23:52:14,337 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 10 remaining) [2023-11-28 23:52:14,337 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 10 remaining) [2023-11-28 23:52:14,337 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (5 of 10 remaining) [2023-11-28 23:52:14,337 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (4 of 10 remaining) [2023-11-28 23:52:14,338 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (3 of 10 remaining) [2023-11-28 23:52:14,338 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (2 of 10 remaining) [2023-11-28 23:52:14,338 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (1 of 10 remaining) [2023-11-28 23:52:14,338 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 10 remaining) [2023-11-28 23:52:14,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-11-28 23:52:14,339 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-11-28 23:52:14,339 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-28 23:52:14,339 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-11-28 23:52:14,364 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-28 23:52:14,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 89 places, 88 transitions, 230 flow [2023-11-28 23:52:14,378 INFO L124 PetriNetUnfolderBase]: 12/135 cut-off events. [2023-11-28 23:52:14,379 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2023-11-28 23:52:14,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169 conditions, 135 events. 12/135 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 402 event pairs, 0 based on Foata normal form. 0/89 useless extension candidates. Maximal degree in co-relation 139. Up to 7 conditions per place. [2023-11-28 23:52:14,379 INFO L82 GeneralOperation]: Start removeDead. Operand has 89 places, 88 transitions, 230 flow [2023-11-28 23:52:14,381 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 89 places, 88 transitions, 230 flow [2023-11-28 23:52:14,382 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-28 23:52:14,383 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;@179e8502, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-28 23:52:14,383 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2023-11-28 23:52:14,384 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-28 23:52:14,384 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-11-28 23:52:14,384 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-28 23:52:14,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:52:14,384 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-28 23:52:14,384 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-28 23:52:14,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:52:14,385 INFO L85 PathProgramCache]: Analyzing trace with hash 473127, now seen corresponding path program 1 times [2023-11-28 23:52:14,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:52:14,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566131109] [2023-11-28 23:52:14,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:52:14,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:52:14,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:52:14,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:52:14,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:52:14,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566131109] [2023-11-28 23:52:14,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566131109] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:52:14,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:52:14,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-28 23:52:14,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930563987] [2023-11-28 23:52:14,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:52:14,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 23:52:14,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:52:14,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 23:52:14,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 23:52:14,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 88 [2023-11-28 23:52:14,418 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 88 transitions, 230 flow. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:52:14,418 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 23:52:14,418 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 88 [2023-11-28 23:52:14,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand