./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread-ext/35_double_lock_p3_vs.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe19702-e7d8-4270-9b9e-eadc47a08687/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe19702-e7d8-4270-9b9e-eadc47a08687/bin/uautomizer-verify-NlZe1sFDwI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe19702-e7d8-4270-9b9e-eadc47a08687/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe19702-e7d8-4270-9b9e-eadc47a08687/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-ext/35_double_lock_p3_vs.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe19702-e7d8-4270-9b9e-eadc47a08687/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe19702-e7d8-4270-9b9e-eadc47a08687/bin/uautomizer-verify-NlZe1sFDwI --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 6710ae2bfe9a41273181e1b4b9dbdfa98f0dea6daffb771915892955eccb69dd --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 21:52:34,866 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 21:52:34,989 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe19702-e7d8-4270-9b9e-eadc47a08687/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-24 21:52:34,994 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 21:52:34,994 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 21:52:35,019 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 21:52:35,020 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 21:52:35,021 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 21:52:35,022 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 21:52:35,022 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 21:52:35,023 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 21:52:35,024 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 21:52:35,025 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 21:52:35,025 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 21:52:35,026 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 21:52:35,026 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 21:52:35,027 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 21:52:35,028 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 21:52:35,028 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 21:52:35,029 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 21:52:35,029 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-24 21:52:35,030 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-24 21:52:35,030 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-24 21:52:35,031 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 21:52:35,031 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-24 21:52:35,032 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-24 21:52:35,032 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 21:52:35,033 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 21:52:35,033 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 21:52:35,034 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 21:52:35,034 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 21:52:35,035 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 21:52:35,035 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:52:35,036 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 21:52:35,036 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 21:52:35,037 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-24 21:52:35,037 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 21:52:35,038 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 21:52:35,038 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 21:52:35,039 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 21:52:35,039 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 21:52:35,040 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_0fe19702-e7d8-4270-9b9e-eadc47a08687/bin/uautomizer-verify-NlZe1sFDwI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe19702-e7d8-4270-9b9e-eadc47a08687/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6710ae2bfe9a41273181e1b4b9dbdfa98f0dea6daffb771915892955eccb69dd [2023-11-24 21:52:35,299 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 21:52:35,332 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 21:52:35,335 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 21:52:35,337 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 21:52:35,338 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 21:52:35,339 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe19702-e7d8-4270-9b9e-eadc47a08687/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/pthread-ext/35_double_lock_p3_vs.i [2023-11-24 21:52:38,460 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 21:52:38,803 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 21:52:38,803 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe19702-e7d8-4270-9b9e-eadc47a08687/sv-benchmarks/c/pthread-ext/35_double_lock_p3_vs.i [2023-11-24 21:52:38,821 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe19702-e7d8-4270-9b9e-eadc47a08687/bin/uautomizer-verify-NlZe1sFDwI/data/538fe1b92/0cc2861dfc034e4aa41772b4d545d86f/FLAGa9723e6c1 [2023-11-24 21:52:38,837 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe19702-e7d8-4270-9b9e-eadc47a08687/bin/uautomizer-verify-NlZe1sFDwI/data/538fe1b92/0cc2861dfc034e4aa41772b4d545d86f [2023-11-24 21:52:38,845 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 21:52:38,850 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 21:52:38,852 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 21:52:38,853 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 21:52:38,859 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 21:52:38,862 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:52:38" (1/1) ... [2023-11-24 21:52:38,863 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b8011a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:52:38, skipping insertion in model container [2023-11-24 21:52:38,863 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:52:38" (1/1) ... [2023-11-24 21:52:38,934 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 21:52:39,350 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:52:39,362 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 21:52:39,432 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:52:39,482 INFO L206 MainTranslator]: Completed translation [2023-11-24 21:52:39,482 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:52:39 WrapperNode [2023-11-24 21:52:39,483 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 21:52:39,484 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 21:52:39,485 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 21:52:39,485 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 21:52:39,495 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:52:39" (1/1) ... [2023-11-24 21:52:39,531 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:52:39" (1/1) ... [2023-11-24 21:52:39,582 INFO L138 Inliner]: procedures = 172, calls = 28, calls flagged for inlining = 12, calls inlined = 16, statements flattened = 128 [2023-11-24 21:52:39,582 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 21:52:39,583 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 21:52:39,584 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 21:52:39,585 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 21:52:39,598 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:52:39" (1/1) ... [2023-11-24 21:52:39,598 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:52:39" (1/1) ... [2023-11-24 21:52:39,620 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:52:39" (1/1) ... [2023-11-24 21:52:39,638 INFO L175 MemorySlicer]: Split 17 memory accesses to 3 slices as follows [2, 2, 13]. 76 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 0, 1]. The 8 writes are split as follows [0, 2, 6]. [2023-11-24 21:52:39,639 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:52:39" (1/1) ... [2023-11-24 21:52:39,640 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:52:39" (1/1) ... [2023-11-24 21:52:39,648 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:52:39" (1/1) ... [2023-11-24 21:52:39,652 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:52:39" (1/1) ... [2023-11-24 21:52:39,655 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:52:39" (1/1) ... [2023-11-24 21:52:39,675 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:52:39" (1/1) ... [2023-11-24 21:52:39,679 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 21:52:39,680 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 21:52:39,680 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 21:52:39,680 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 21:52:39,681 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:52:39" (1/1) ... [2023-11-24 21:52:39,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:52:39,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe19702-e7d8-4270-9b9e-eadc47a08687/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:52:39,735 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe19702-e7d8-4270-9b9e-eadc47a08687/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-24 21:52:39,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe19702-e7d8-4270-9b9e-eadc47a08687/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-24 21:52:39,787 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-24 21:52:39,788 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-24 21:52:39,788 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-24 21:52:39,788 INFO L130 BoogieDeclarations]: Found specification of procedure thr2 [2023-11-24 21:52:39,788 INFO L138 BoogieDeclarations]: Found implementation of procedure thr2 [2023-11-24 21:52:39,789 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-11-24 21:52:39,789 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-11-24 21:52:39,789 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-24 21:52:39,789 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-24 21:52:39,790 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-24 21:52:39,790 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 21:52:39,790 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-24 21:52:39,791 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 21:52:39,792 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-24 21:52:39,792 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-24 21:52:39,792 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-24 21:52:39,792 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 21:52:39,793 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 21:52:39,795 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-24 21:52:40,009 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 21:52:40,012 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 21:52:40,461 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 21:52:40,786 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 21:52:40,787 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-24 21:52:40,787 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:52:40 BoogieIcfgContainer [2023-11-24 21:52:40,788 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 21:52:40,790 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 21:52:40,791 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 21:52:40,794 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 21:52:40,794 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 09:52:38" (1/3) ... [2023-11-24 21:52:40,795 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2822d9e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:52:40, skipping insertion in model container [2023-11-24 21:52:40,795 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:52:39" (2/3) ... [2023-11-24 21:52:40,796 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2822d9e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:52:40, skipping insertion in model container [2023-11-24 21:52:40,796 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:52:40" (3/3) ... [2023-11-24 21:52:40,797 INFO L112 eAbstractionObserver]: Analyzing ICFG 35_double_lock_p3_vs.i [2023-11-24 21:52:40,818 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 21:52:40,818 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 30 error locations. [2023-11-24 21:52:40,818 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-24 21:52:40,899 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-24 21:52:40,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 66 places, 64 transitions, 136 flow [2023-11-24 21:52:41,067 INFO L124 PetriNetUnfolderBase]: 4/70 cut-off events. [2023-11-24 21:52:41,068 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-24 21:52:41,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77 conditions, 70 events. 4/70 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 232 event pairs, 0 based on Foata normal form. 0/31 useless extension candidates. Maximal degree in co-relation 67. Up to 2 conditions per place. [2023-11-24 21:52:41,074 INFO L82 GeneralOperation]: Start removeDead. Operand has 66 places, 64 transitions, 136 flow [2023-11-24 21:52:41,079 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 65 places, 63 transitions, 133 flow [2023-11-24 21:52:41,093 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 21:52:41,105 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;@1e05055a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 21:52:41,105 INFO L358 AbstractCegarLoop]: Starting to check reachability of 57 error locations. [2023-11-24 21:52:41,108 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-24 21:52:41,108 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-11-24 21:52:41,108 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-24 21:52:41,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:52:41,109 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-24 21:52:41,109 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-11-24 21:52:41,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:52:41,115 INFO L85 PathProgramCache]: Analyzing trace with hash 15757, now seen corresponding path program 1 times [2023-11-24 21:52:41,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:52:41,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265308162] [2023-11-24 21:52:41,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:52:41,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:52:41,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:52:41,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:52:41,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:52:41,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265308162] [2023-11-24 21:52:41,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265308162] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:52:41,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:52:41,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:52:41,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49233463] [2023-11-24 21:52:41,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:52:41,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:52:41,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:52:41,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:52:41,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:52:41,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 64 [2023-11-24 21:52:41,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 63 transitions, 133 flow. Second operand has 3 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) [2023-11-24 21:52:41,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:52:41,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 64 [2023-11-24 21:52:41,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:52:42,061 INFO L124 PetriNetUnfolderBase]: 1254/1949 cut-off events. [2023-11-24 21:52:42,062 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-24 21:52:42,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3834 conditions, 1949 events. 1254/1949 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 10875 event pairs, 984 based on Foata normal form. 318/1499 useless extension candidates. Maximal degree in co-relation 3821. Up to 1863 conditions per place. [2023-11-24 21:52:42,092 INFO L140 encePairwiseOnDemand]: 45/64 looper letters, 32 selfloop transitions, 1 changer transitions 0/42 dead transitions. [2023-11-24 21:52:42,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 42 transitions, 157 flow [2023-11-24 21:52:42,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:52:42,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:52:42,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 84 transitions. [2023-11-24 21:52:42,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2023-11-24 21:52:42,107 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 84 transitions. [2023-11-24 21:52:42,108 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 84 transitions. [2023-11-24 21:52:42,109 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:52:42,112 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 84 transitions. [2023-11-24 21:52:42,116 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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) [2023-11-24 21:52:42,121 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 64.0) internal successors, (256), 4 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:52:42,122 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 64.0) internal successors, (256), 4 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:52:42,124 INFO L175 Difference]: Start difference. First operand has 65 places, 63 transitions, 133 flow. Second operand 3 states and 84 transitions. [2023-11-24 21:52:42,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 42 transitions, 157 flow [2023-11-24 21:52:42,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 42 transitions, 156 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:52:42,135 INFO L231 Difference]: Finished difference. Result has 47 places, 42 transitions, 92 flow [2023-11-24 21:52:42,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=92, PETRI_PLACES=47, PETRI_TRANSITIONS=42} [2023-11-24 21:52:42,141 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -18 predicate places. [2023-11-24 21:52:42,142 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 42 transitions, 92 flow [2023-11-24 21:52:42,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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) [2023-11-24 21:52:42,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:52:42,143 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-24 21:52:42,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 21:52:42,143 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-11-24 21:52:42,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:52:42,145 INFO L85 PathProgramCache]: Analyzing trace with hash 15758, now seen corresponding path program 1 times [2023-11-24 21:52:42,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:52:42,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228243705] [2023-11-24 21:52:42,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:52:42,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:52:42,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:52:42,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:52:42,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:52:42,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228243705] [2023-11-24 21:52:42,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228243705] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:52:42,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:52:42,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:52:42,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788638269] [2023-11-24 21:52:42,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:52:42,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:52:42,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:52:42,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:52:42,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:52:42,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 64 [2023-11-24 21:52:42,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 42 transitions, 92 flow. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:52:42,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:52:42,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 64 [2023-11-24 21:52:42,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:52:42,588 INFO L124 PetriNetUnfolderBase]: 902/1435 cut-off events. [2023-11-24 21:52:42,589 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-11-24 21:52:42,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2816 conditions, 1435 events. 902/1435 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 7873 event pairs, 700 based on Foata normal form. 161/1020 useless extension candidates. Maximal degree in co-relation 2809. Up to 1358 conditions per place. [2023-11-24 21:52:42,605 INFO L140 encePairwiseOnDemand]: 61/64 looper letters, 30 selfloop transitions, 1 changer transitions 0/40 dead transitions. [2023-11-24 21:52:42,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 40 transitions, 150 flow [2023-11-24 21:52:42,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:52:42,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:52:42,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 72 transitions. [2023-11-24 21:52:42,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2023-11-24 21:52:42,609 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 72 transitions. [2023-11-24 21:52:42,609 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 72 transitions. [2023-11-24 21:52:42,610 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:52:42,610 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 72 transitions. [2023-11-24 21:52:42,612 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) [2023-11-24 21:52:42,615 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 64.0) internal successors, (256), 4 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:52:42,615 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 64.0) internal successors, (256), 4 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:52:42,615 INFO L175 Difference]: Start difference. First operand has 47 places, 42 transitions, 92 flow. Second operand 3 states and 72 transitions. [2023-11-24 21:52:42,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 40 transitions, 150 flow [2023-11-24 21:52:42,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 40 transitions, 149 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:52:42,619 INFO L231 Difference]: Finished difference. Result has 46 places, 40 transitions, 89 flow [2023-11-24 21:52:42,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=44, 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=89, PETRI_PLACES=46, PETRI_TRANSITIONS=40} [2023-11-24 21:52:42,623 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -19 predicate places. [2023-11-24 21:52:42,624 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 40 transitions, 89 flow [2023-11-24 21:52:42,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:52:42,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:52:42,625 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-24 21:52:42,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 21:52:42,627 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-11-24 21:52:42,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:52:42,627 INFO L85 PathProgramCache]: Analyzing trace with hash 1683005369, now seen corresponding path program 1 times [2023-11-24 21:52:42,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:52:42,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151273636] [2023-11-24 21:52:42,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:52:42,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:52:42,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:52:42,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:52:42,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:52:42,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151273636] [2023-11-24 21:52:42,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151273636] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:52:42,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:52:42,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:52:42,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278630469] [2023-11-24 21:52:42,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:52:42,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:52:42,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:52:42,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:52:42,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:52:42,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 64 [2023-11-24 21:52:42,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 40 transitions, 89 flow. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:52:42,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:52:42,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 64 [2023-11-24 21:52:42,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:52:43,090 INFO L124 PetriNetUnfolderBase]: 717/1129 cut-off events. [2023-11-24 21:52:43,090 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-24 21:52:43,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2227 conditions, 1129 events. 717/1129 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 5617 event pairs, 566 based on Foata normal form. 0/816 useless extension candidates. Maximal degree in co-relation 2219. Up to 1078 conditions per place. [2023-11-24 21:52:43,102 INFO L140 encePairwiseOnDemand]: 57/64 looper letters, 26 selfloop transitions, 1 changer transitions 0/34 dead transitions. [2023-11-24 21:52:43,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 34 transitions, 131 flow [2023-11-24 21:52:43,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:52:43,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:52:43,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 72 transitions. [2023-11-24 21:52:43,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2023-11-24 21:52:43,104 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 72 transitions. [2023-11-24 21:52:43,104 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 72 transitions. [2023-11-24 21:52:43,105 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:52:43,105 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 72 transitions. [2023-11-24 21:52:43,106 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) [2023-11-24 21:52:43,107 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 64.0) internal successors, (256), 4 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:52:43,107 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 64.0) internal successors, (256), 4 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:52:43,108 INFO L175 Difference]: Start difference. First operand has 46 places, 40 transitions, 89 flow. Second operand 3 states and 72 transitions. [2023-11-24 21:52:43,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 34 transitions, 131 flow [2023-11-24 21:52:43,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 34 transitions, 130 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:52:43,110 INFO L231 Difference]: Finished difference. Result has 41 places, 34 transitions, 78 flow [2023-11-24 21:52:43,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=78, PETRI_PLACES=41, PETRI_TRANSITIONS=34} [2023-11-24 21:52:43,111 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -24 predicate places. [2023-11-24 21:52:43,112 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 34 transitions, 78 flow [2023-11-24 21:52:43,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:52:43,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:52:43,113 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-24 21:52:43,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-24 21:52:43,113 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-11-24 21:52:43,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:52:43,114 INFO L85 PathProgramCache]: Analyzing trace with hash 1683005370, now seen corresponding path program 1 times [2023-11-24 21:52:43,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:52:43,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529741605] [2023-11-24 21:52:43,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:52:43,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:52:43,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:52:43,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:52:43,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:52:43,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529741605] [2023-11-24 21:52:43,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529741605] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:52:43,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:52:43,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:52:43,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172004777] [2023-11-24 21:52:43,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:52:43,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:52:43,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:52:43,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:52:43,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:52:43,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 64 [2023-11-24 21:52:43,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 34 transitions, 78 flow. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:52:43,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:52:43,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 64 [2023-11-24 21:52:43,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:52:43,410 INFO L124 PetriNetUnfolderBase]: 232/409 cut-off events. [2023-11-24 21:52:43,411 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-24 21:52:43,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 790 conditions, 409 events. 232/409 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1714 event pairs, 184 based on Foata normal form. 0/395 useless extension candidates. Maximal degree in co-relation 781. Up to 364 conditions per place. [2023-11-24 21:52:43,415 INFO L140 encePairwiseOnDemand]: 57/64 looper letters, 18 selfloop transitions, 1 changer transitions 0/28 dead transitions. [2023-11-24 21:52:43,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 28 transitions, 104 flow [2023-11-24 21:52:43,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:52:43,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:52:43,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 70 transitions. [2023-11-24 21:52:43,420 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3645833333333333 [2023-11-24 21:52:43,420 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 70 transitions. [2023-11-24 21:52:43,420 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 70 transitions. [2023-11-24 21:52:43,420 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:52:43,421 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 70 transitions. [2023-11-24 21:52:43,422 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) [2023-11-24 21:52:43,423 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 64.0) internal successors, (256), 4 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:52:43,424 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 64.0) internal successors, (256), 4 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:52:43,424 INFO L175 Difference]: Start difference. First operand has 41 places, 34 transitions, 78 flow. Second operand 3 states and 70 transitions. [2023-11-24 21:52:43,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 28 transitions, 104 flow [2023-11-24 21:52:43,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 28 transitions, 103 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:52:43,427 INFO L231 Difference]: Finished difference. Result has 36 places, 28 transitions, 67 flow [2023-11-24 21:52:43,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=65, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=67, PETRI_PLACES=36, PETRI_TRANSITIONS=28} [2023-11-24 21:52:43,429 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -29 predicate places. [2023-11-24 21:52:43,429 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 28 transitions, 67 flow [2023-11-24 21:52:43,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:52:43,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:52:43,430 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:52:43,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-24 21:52:43,431 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err4ASSERT_VIOLATIONMEMORY_LEAK === [thr2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-11-24 21:52:43,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:52:43,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1034612001, now seen corresponding path program 1 times [2023-11-24 21:52:43,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:52:43,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373515479] [2023-11-24 21:52:43,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:52:43,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:52:43,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:52:43,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:52:43,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:52:43,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373515479] [2023-11-24 21:52:43,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373515479] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:52:43,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:52:43,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:52:43,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803595925] [2023-11-24 21:52:43,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:52:43,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:52:43,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:52:43,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:52:43,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:52:43,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 64 [2023-11-24 21:52:43,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 28 transitions, 67 flow. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:52:43,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:52:43,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 64 [2023-11-24 21:52:43,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:52:43,575 INFO L124 PetriNetUnfolderBase]: 174/303 cut-off events. [2023-11-24 21:52:43,576 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-24 21:52:43,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 592 conditions, 303 events. 174/303 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1192 event pairs, 129 based on Foata normal form. 36/328 useless extension candidates. Maximal degree in co-relation 582. Up to 273 conditions per place. [2023-11-24 21:52:43,580 INFO L140 encePairwiseOnDemand]: 62/64 looper letters, 17 selfloop transitions, 1 changer transitions 0/25 dead transitions. [2023-11-24 21:52:43,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 25 transitions, 97 flow [2023-11-24 21:52:43,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:52:43,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:52:43,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 64 transitions. [2023-11-24 21:52:43,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2023-11-24 21:52:43,582 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 64 transitions. [2023-11-24 21:52:43,582 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 64 transitions. [2023-11-24 21:52:43,582 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:52:43,583 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 64 transitions. [2023-11-24 21:52:43,583 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:52:43,585 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 64.0) internal successors, (256), 4 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:52:43,586 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 64.0) internal successors, (256), 4 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:52:43,586 INFO L175 Difference]: Start difference. First operand has 36 places, 28 transitions, 67 flow. Second operand 3 states and 64 transitions. [2023-11-24 21:52:43,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 25 transitions, 97 flow [2023-11-24 21:52:43,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 25 transitions, 96 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:52:43,587 INFO L231 Difference]: Finished difference. Result has 34 places, 25 transitions, 62 flow [2023-11-24 21:52:43,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=32, 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=62, PETRI_PLACES=34, PETRI_TRANSITIONS=25} [2023-11-24 21:52:43,590 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -31 predicate places. [2023-11-24 21:52:43,590 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 25 transitions, 62 flow [2023-11-24 21:52:43,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:52:43,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:52:43,591 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:52:43,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-24 21:52:43,591 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-11-24 21:52:43,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:52:43,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1477759380, now seen corresponding path program 1 times [2023-11-24 21:52:43,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:52:43,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726476991] [2023-11-24 21:52:43,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:52:43,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:52:43,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-24 21:52:43,614 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-24 21:52:43,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-24 21:52:43,643 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-24 21:52:43,643 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-24 21:52:43,645 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (56 of 57 remaining) [2023-11-24 21:52:43,646 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (55 of 57 remaining) [2023-11-24 21:52:43,647 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (54 of 57 remaining) [2023-11-24 21:52:43,647 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (53 of 57 remaining) [2023-11-24 21:52:43,647 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (52 of 57 remaining) [2023-11-24 21:52:43,648 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (51 of 57 remaining) [2023-11-24 21:52:43,648 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (50 of 57 remaining) [2023-11-24 21:52:43,648 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (49 of 57 remaining) [2023-11-24 21:52:43,648 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 57 remaining) [2023-11-24 21:52:43,648 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 57 remaining) [2023-11-24 21:52:43,649 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 57 remaining) [2023-11-24 21:52:43,649 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 57 remaining) [2023-11-24 21:52:43,649 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 57 remaining) [2023-11-24 21:52:43,649 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 57 remaining) [2023-11-24 21:52:43,649 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 57 remaining) [2023-11-24 21:52:43,650 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 57 remaining) [2023-11-24 21:52:43,650 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 57 remaining) [2023-11-24 21:52:43,650 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 57 remaining) [2023-11-24 21:52:43,650 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 57 remaining) [2023-11-24 21:52:43,650 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 57 remaining) [2023-11-24 21:52:43,651 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 57 remaining) [2023-11-24 21:52:43,651 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 57 remaining) [2023-11-24 21:52:43,651 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 57 remaining) [2023-11-24 21:52:43,651 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 57 remaining) [2023-11-24 21:52:43,651 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 57 remaining) [2023-11-24 21:52:43,652 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONMEMORY_LEAK (31 of 57 remaining) [2023-11-24 21:52:43,652 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 57 remaining) [2023-11-24 21:52:43,652 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 57 remaining) [2023-11-24 21:52:43,652 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 57 remaining) [2023-11-24 21:52:43,652 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 57 remaining) [2023-11-24 21:52:43,653 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (26 of 57 remaining) [2023-11-24 21:52:43,653 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (25 of 57 remaining) [2023-11-24 21:52:43,653 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 57 remaining) [2023-11-24 21:52:43,653 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 57 remaining) [2023-11-24 21:52:43,653 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 57 remaining) [2023-11-24 21:52:43,654 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 57 remaining) [2023-11-24 21:52:43,654 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 57 remaining) [2023-11-24 21:52:43,654 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 57 remaining) [2023-11-24 21:52:43,654 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 57 remaining) [2023-11-24 21:52:43,654 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 57 remaining) [2023-11-24 21:52:43,655 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 57 remaining) [2023-11-24 21:52:43,655 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 57 remaining) [2023-11-24 21:52:43,655 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 57 remaining) [2023-11-24 21:52:43,655 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 57 remaining) [2023-11-24 21:52:43,655 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 57 remaining) [2023-11-24 21:52:43,661 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 57 remaining) [2023-11-24 21:52:43,661 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 57 remaining) [2023-11-24 21:52:43,661 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 57 remaining) [2023-11-24 21:52:43,663 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 57 remaining) [2023-11-24 21:52:43,664 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 57 remaining) [2023-11-24 21:52:43,665 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 57 remaining) [2023-11-24 21:52:43,665 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 57 remaining) [2023-11-24 21:52:43,665 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 57 remaining) [2023-11-24 21:52:43,666 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 57 remaining) [2023-11-24 21:52:43,666 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 57 remaining) [2023-11-24 21:52:43,666 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 57 remaining) [2023-11-24 21:52:43,666 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONMEMORY_LEAK (0 of 57 remaining) [2023-11-24 21:52:43,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-24 21:52:43,667 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2023-11-24 21:52:43,669 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-24 21:52:43,670 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-24 21:52:43,762 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-24 21:52:43,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 115 places, 113 transitions, 246 flow [2023-11-24 21:52:43,782 INFO L124 PetriNetUnfolderBase]: 5/106 cut-off events. [2023-11-24 21:52:43,783 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-24 21:52:43,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118 conditions, 106 events. 5/106 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 408 event pairs, 0 based on Foata normal form. 0/46 useless extension candidates. Maximal degree in co-relation 113. Up to 3 conditions per place. [2023-11-24 21:52:43,784 INFO L82 GeneralOperation]: Start removeDead. Operand has 115 places, 113 transitions, 246 flow [2023-11-24 21:52:43,787 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 94 places, 91 transitions, 195 flow [2023-11-24 21:52:43,788 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 21:52:43,788 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;@1e05055a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 21:52:43,789 INFO L358 AbstractCegarLoop]: Starting to check reachability of 82 error locations. [2023-11-24 21:52:43,790 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-24 21:52:43,790 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-11-24 21:52:43,790 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-24 21:52:43,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:52:43,790 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-24 21:52:43,790 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2023-11-24 21:52:43,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:52:43,790 INFO L85 PathProgramCache]: Analyzing trace with hash 19373, now seen corresponding path program 1 times [2023-11-24 21:52:43,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:52:43,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637383761] [2023-11-24 21:52:43,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:52:43,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:52:43,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:52:43,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:52:43,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:52:43,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637383761] [2023-11-24 21:52:43,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637383761] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:52:43,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:52:43,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:52:43,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520739161] [2023-11-24 21:52:43,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:52:43,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:52:43,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:52:43,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:52:43,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:52:43,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 113 [2023-11-24 21:52:43,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 91 transitions, 195 flow. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:52:43,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:52:43,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 113 [2023-11-24 21:52:43,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:52:50,260 INFO L124 PetriNetUnfolderBase]: 35742/48108 cut-off events. [2023-11-24 21:52:50,260 INFO L125 PetriNetUnfolderBase]: For 494/494 co-relation queries the response was YES. [2023-11-24 21:52:50,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95594 conditions, 48108 events. 35742/48108 cut-off events. For 494/494 co-relation queries the response was YES. Maximal size of possible extension queue 2447. Compared 306489 event pairs, 30244 based on Foata normal form. 6092/33823 useless extension candidates. Maximal degree in co-relation 95580. Up to 47007 conditions per place. [2023-11-24 21:52:50,664 INFO L140 encePairwiseOnDemand]: 86/113 looper letters, 51 selfloop transitions, 1 changer transitions 0/62 dead transitions. [2023-11-24 21:52:50,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 62 transitions, 241 flow [2023-11-24 21:52:50,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:52:50,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:52:50,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 129 transitions. [2023-11-24 21:52:50,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3805309734513274 [2023-11-24 21:52:50,667 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 129 transitions. [2023-11-24 21:52:50,668 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 129 transitions. [2023-11-24 21:52:50,668 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:52:50,668 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 129 transitions. [2023-11-24 21:52:50,669 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:52:50,674 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 113.0) internal successors, (452), 4 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:52:50,675 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 113.0) internal successors, (452), 4 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:52:50,676 INFO L175 Difference]: Start difference. First operand has 94 places, 91 transitions, 195 flow. Second operand 3 states and 129 transitions. [2023-11-24 21:52:50,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 62 transitions, 241 flow [2023-11-24 21:52:50,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 62 transitions, 240 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:52:50,681 INFO L231 Difference]: Finished difference. Result has 68 places, 62 transitions, 138 flow [2023-11-24 21:52:50,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=113, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=138, PETRI_PLACES=68, PETRI_TRANSITIONS=62} [2023-11-24 21:52:50,684 INFO L281 CegarLoopForPetriNet]: 94 programPoint places, -26 predicate places. [2023-11-24 21:52:50,684 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 62 transitions, 138 flow [2023-11-24 21:52:50,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:52:50,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:52:50,685 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-24 21:52:50,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-24 21:52:50,685 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2023-11-24 21:52:50,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:52:50,687 INFO L85 PathProgramCache]: Analyzing trace with hash 19374, now seen corresponding path program 1 times [2023-11-24 21:52:50,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:52:50,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635296044] [2023-11-24 21:52:50,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:52:50,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:52:50,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:52:50,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:52:50,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:52:50,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635296044] [2023-11-24 21:52:50,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635296044] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:52:50,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:52:50,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:52:50,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107965553] [2023-11-24 21:52:50,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:52:50,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:52:50,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:52:50,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:52:50,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:52:50,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 113 [2023-11-24 21:52:50,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 62 transitions, 138 flow. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:52:50,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:52:50,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 113 [2023-11-24 21:52:50,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:52:54,157 INFO L124 PetriNetUnfolderBase]: 26084/35302 cut-off events. [2023-11-24 21:52:54,157 INFO L125 PetriNetUnfolderBase]: For 478/478 co-relation queries the response was YES. [2023-11-24 21:52:54,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70314 conditions, 35302 events. 26084/35302 cut-off events. For 478/478 co-relation queries the response was YES. Maximal size of possible extension queue 1873. Compared 220528 event pairs, 21961 based on Foata normal form. 3049/23068 useless extension candidates. Maximal degree in co-relation 70306. Up to 34532 conditions per place. [2023-11-24 21:52:54,388 INFO L140 encePairwiseOnDemand]: 110/113 looper letters, 49 selfloop transitions, 1 changer transitions 0/60 dead transitions. [2023-11-24 21:52:54,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 60 transitions, 234 flow [2023-11-24 21:52:54,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:52:54,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:52:54,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 109 transitions. [2023-11-24 21:52:54,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3215339233038348 [2023-11-24 21:52:54,391 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 109 transitions. [2023-11-24 21:52:54,391 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 109 transitions. [2023-11-24 21:52:54,392 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:52:54,392 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 109 transitions. [2023-11-24 21:52:54,392 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:52:54,394 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 113.0) internal successors, (452), 4 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:52:54,395 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 113.0) internal successors, (452), 4 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:52:54,395 INFO L175 Difference]: Start difference. First operand has 68 places, 62 transitions, 138 flow. Second operand 3 states and 109 transitions. [2023-11-24 21:52:54,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 60 transitions, 234 flow [2023-11-24 21:52:54,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 60 transitions, 233 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:52:54,401 INFO L231 Difference]: Finished difference. Result has 67 places, 60 transitions, 135 flow [2023-11-24 21:52:54,401 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=113, PETRI_DIFFERENCE_MINUEND_FLOW=133, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=135, PETRI_PLACES=67, PETRI_TRANSITIONS=60} [2023-11-24 21:52:54,403 INFO L281 CegarLoopForPetriNet]: 94 programPoint places, -27 predicate places. [2023-11-24 21:52:54,403 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 60 transitions, 135 flow [2023-11-24 21:52:54,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:52:54,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:52:54,404 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-24 21:52:54,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-24 21:52:54,404 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2023-11-24 21:52:54,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:52:54,405 INFO L85 PathProgramCache]: Analyzing trace with hash 732415449, now seen corresponding path program 1 times [2023-11-24 21:52:54,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:52:54,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616115631] [2023-11-24 21:52:54,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:52:54,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:52:54,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:52:54,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:52:54,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:52:54,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616115631] [2023-11-24 21:52:54,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616115631] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:52:54,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:52:54,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:52:54,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970898398] [2023-11-24 21:52:54,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:52:54,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:52:54,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:52:54,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:52:54,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:52:54,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 113 [2023-11-24 21:52:54,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 60 transitions, 135 flow. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:52:54,571 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:52:54,571 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 113 [2023-11-24 21:52:54,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:52:56,789 INFO L124 PetriNetUnfolderBase]: 16389/22240 cut-off events. [2023-11-24 21:52:56,790 INFO L125 PetriNetUnfolderBase]: For 294/294 co-relation queries the response was YES. [2023-11-24 21:52:56,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44129 conditions, 22240 events. 16389/22240 cut-off events. For 294/294 co-relation queries the response was YES. Maximal size of possible extension queue 1052. Compared 128907 event pairs, 13886 based on Foata normal form. 0/15626 useless extension candidates. Maximal degree in co-relation 44120. Up to 21598 conditions per place. [2023-11-24 21:52:56,928 INFO L140 encePairwiseOnDemand]: 102/113 looper letters, 41 selfloop transitions, 1 changer transitions 0/50 dead transitions. [2023-11-24 21:52:56,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 50 transitions, 199 flow [2023-11-24 21:52:56,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:52:56,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:52:56,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 109 transitions. [2023-11-24 21:52:56,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3215339233038348 [2023-11-24 21:52:56,930 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 109 transitions. [2023-11-24 21:52:56,930 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 109 transitions. [2023-11-24 21:52:56,930 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:52:56,930 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 109 transitions. [2023-11-24 21:52:56,931 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:52:56,932 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 113.0) internal successors, (452), 4 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:52:56,932 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 113.0) internal successors, (452), 4 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:52:56,933 INFO L175 Difference]: Start difference. First operand has 67 places, 60 transitions, 135 flow. Second operand 3 states and 109 transitions. [2023-11-24 21:52:56,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 50 transitions, 199 flow [2023-11-24 21:52:56,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 50 transitions, 198 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:52:56,937 INFO L231 Difference]: Finished difference. Result has 58 places, 50 transitions, 116 flow [2023-11-24 21:52:56,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=113, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=116, PETRI_PLACES=58, PETRI_TRANSITIONS=50} [2023-11-24 21:52:56,939 INFO L281 CegarLoopForPetriNet]: 94 programPoint places, -36 predicate places. [2023-11-24 21:52:56,939 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 50 transitions, 116 flow [2023-11-24 21:52:56,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:52:56,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:52:56,940 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-24 21:52:56,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-24 21:52:56,940 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2023-11-24 21:52:56,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:52:56,941 INFO L85 PathProgramCache]: Analyzing trace with hash 732415450, now seen corresponding path program 1 times [2023-11-24 21:52:56,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:52:56,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867363105] [2023-11-24 21:52:56,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:52:56,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:52:56,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:52:57,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:52:57,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:52:57,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867363105] [2023-11-24 21:52:57,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867363105] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:52:57,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:52:57,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:52:57,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291084550] [2023-11-24 21:52:57,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:52:57,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:52:57,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:52:57,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:52:57,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:52:57,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 113 [2023-11-24 21:52:57,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 50 transitions, 116 flow. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 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) [2023-11-24 21:52:57,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:52:57,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 113 [2023-11-24 21:52:57,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:52:57,691 INFO L124 PetriNetUnfolderBase]: 4100/5742 cut-off events. [2023-11-24 21:52:57,691 INFO L125 PetriNetUnfolderBase]: For 142/142 co-relation queries the response was YES. [2023-11-24 21:52:57,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11360 conditions, 5742 events. 4100/5742 cut-off events. For 142/142 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 28043 event pairs, 3473 based on Foata normal form. 0/5463 useless extension candidates. Maximal degree in co-relation 11350. Up to 5468 conditions per place. [2023-11-24 21:52:57,733 INFO L140 encePairwiseOnDemand]: 102/113 looper letters, 29 selfloop transitions, 1 changer transitions 0/40 dead transitions. [2023-11-24 21:52:57,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 40 transitions, 156 flow [2023-11-24 21:52:57,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:52:57,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:52:57,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 103 transitions. [2023-11-24 21:52:57,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30383480825958703 [2023-11-24 21:52:57,735 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 103 transitions. [2023-11-24 21:52:57,735 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 103 transitions. [2023-11-24 21:52:57,735 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:52:57,735 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 103 transitions. [2023-11-24 21:52:57,736 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:52:57,737 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 113.0) internal successors, (452), 4 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:52:57,737 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 113.0) internal successors, (452), 4 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:52:57,737 INFO L175 Difference]: Start difference. First operand has 58 places, 50 transitions, 116 flow. Second operand 3 states and 103 transitions. [2023-11-24 21:52:57,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 40 transitions, 156 flow [2023-11-24 21:52:57,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 40 transitions, 155 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:52:57,739 INFO L231 Difference]: Finished difference. Result has 49 places, 40 transitions, 97 flow [2023-11-24 21:52:57,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=113, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=47, 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=97, PETRI_PLACES=49, PETRI_TRANSITIONS=40} [2023-11-24 21:52:57,740 INFO L281 CegarLoopForPetriNet]: 94 programPoint places, -45 predicate places. [2023-11-24 21:52:57,740 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 40 transitions, 97 flow [2023-11-24 21:52:57,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 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) [2023-11-24 21:52:57,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:52:57,741 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:52:57,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-24 21:52:57,741 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err4ASSERT_VIOLATIONMEMORY_LEAK === [thr2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2023-11-24 21:52:57,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:52:57,742 INFO L85 PathProgramCache]: Analyzing trace with hash 955589983, now seen corresponding path program 1 times [2023-11-24 21:52:57,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:52:57,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166341309] [2023-11-24 21:52:57,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:52:57,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:52:57,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:52:57,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:52:57,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:52:57,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166341309] [2023-11-24 21:52:57,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166341309] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:52:57,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:52:57,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:52:57,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457657371] [2023-11-24 21:52:57,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:52:57,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:52:57,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:52:57,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:52:57,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:52:57,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 113 [2023-11-24 21:52:57,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 40 transitions, 97 flow. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:52:57,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:52:57,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 113 [2023-11-24 21:52:57,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:52:58,254 INFO L124 PetriNetUnfolderBase]: 3075/4304 cut-off events. [2023-11-24 21:52:58,254 INFO L125 PetriNetUnfolderBase]: For 106/106 co-relation queries the response was YES. [2023-11-24 21:52:58,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8521 conditions, 4304 events. 3075/4304 cut-off events. For 106/106 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 21154 event pairs, 2505 based on Foata normal form. 399/4493 useless extension candidates. Maximal degree in co-relation 8510. Up to 4101 conditions per place. [2023-11-24 21:52:58,279 INFO L140 encePairwiseOnDemand]: 111/113 looper letters, 28 selfloop transitions, 1 changer transitions 0/37 dead transitions. [2023-11-24 21:52:58,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 37 transitions, 149 flow [2023-11-24 21:52:58,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:52:58,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:52:58,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 93 transitions. [2023-11-24 21:52:58,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2743362831858407 [2023-11-24 21:52:58,281 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 93 transitions. [2023-11-24 21:52:58,281 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 93 transitions. [2023-11-24 21:52:58,282 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:52:58,282 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 93 transitions. [2023-11-24 21:52:58,283 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:52:58,285 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 113.0) internal successors, (452), 4 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:52:58,285 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 113.0) internal successors, (452), 4 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:52:58,285 INFO L175 Difference]: Start difference. First operand has 49 places, 40 transitions, 97 flow. Second operand 3 states and 93 transitions. [2023-11-24 21:52:58,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 37 transitions, 149 flow [2023-11-24 21:52:58,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 37 transitions, 148 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:52:58,293 INFO L231 Difference]: Finished difference. Result has 47 places, 37 transitions, 92 flow [2023-11-24 21:52:58,294 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=113, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=92, PETRI_PLACES=47, PETRI_TRANSITIONS=37} [2023-11-24 21:52:58,295 INFO L281 CegarLoopForPetriNet]: 94 programPoint places, -47 predicate places. [2023-11-24 21:52:58,296 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 37 transitions, 92 flow [2023-11-24 21:52:58,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:52:58,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:52:58,296 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:52:58,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-24 21:52:58,297 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2023-11-24 21:52:58,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:52:58,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1455284787, now seen corresponding path program 1 times [2023-11-24 21:52:58,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:52:58,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325631596] [2023-11-24 21:52:58,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:52:58,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:52:58,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-24 21:52:58,318 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-24 21:52:58,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-24 21:52:58,345 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-24 21:52:58,346 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-24 21:52:58,346 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (81 of 82 remaining) [2023-11-24 21:52:58,346 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (80 of 82 remaining) [2023-11-24 21:52:58,346 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (79 of 82 remaining) [2023-11-24 21:52:58,347 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (78 of 82 remaining) [2023-11-24 21:52:58,347 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (77 of 82 remaining) [2023-11-24 21:52:58,347 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (76 of 82 remaining) [2023-11-24 21:52:58,347 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (75 of 82 remaining) [2023-11-24 21:52:58,348 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (74 of 82 remaining) [2023-11-24 21:52:58,348 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (73 of 82 remaining) [2023-11-24 21:52:58,348 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (72 of 82 remaining) [2023-11-24 21:52:58,348 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (71 of 82 remaining) [2023-11-24 21:52:58,349 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (70 of 82 remaining) [2023-11-24 21:52:58,349 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (69 of 82 remaining) [2023-11-24 21:52:58,349 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (68 of 82 remaining) [2023-11-24 21:52:58,349 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (67 of 82 remaining) [2023-11-24 21:52:58,350 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (66 of 82 remaining) [2023-11-24 21:52:58,350 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (65 of 82 remaining) [2023-11-24 21:52:58,350 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (64 of 82 remaining) [2023-11-24 21:52:58,350 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (63 of 82 remaining) [2023-11-24 21:52:58,350 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (62 of 82 remaining) [2023-11-24 21:52:58,351 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (61 of 82 remaining) [2023-11-24 21:52:58,351 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (60 of 82 remaining) [2023-11-24 21:52:58,351 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (59 of 82 remaining) [2023-11-24 21:52:58,351 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (58 of 82 remaining) [2023-11-24 21:52:58,352 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (57 of 82 remaining) [2023-11-24 21:52:58,352 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONMEMORY_LEAK (56 of 82 remaining) [2023-11-24 21:52:58,352 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (55 of 82 remaining) [2023-11-24 21:52:58,352 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (54 of 82 remaining) [2023-11-24 21:52:58,353 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (53 of 82 remaining) [2023-11-24 21:52:58,353 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (52 of 82 remaining) [2023-11-24 21:52:58,353 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (51 of 82 remaining) [2023-11-24 21:52:58,353 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (50 of 82 remaining) [2023-11-24 21:52:58,354 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (49 of 82 remaining) [2023-11-24 21:52:58,354 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 82 remaining) [2023-11-24 21:52:58,354 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 82 remaining) [2023-11-24 21:52:58,354 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 82 remaining) [2023-11-24 21:52:58,354 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 82 remaining) [2023-11-24 21:52:58,355 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 82 remaining) [2023-11-24 21:52:58,355 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 82 remaining) [2023-11-24 21:52:58,355 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 82 remaining) [2023-11-24 21:52:58,355 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 82 remaining) [2023-11-24 21:52:58,356 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 82 remaining) [2023-11-24 21:52:58,356 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 82 remaining) [2023-11-24 21:52:58,356 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 82 remaining) [2023-11-24 21:52:58,356 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 82 remaining) [2023-11-24 21:52:58,357 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 82 remaining) [2023-11-24 21:52:58,357 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 82 remaining) [2023-11-24 21:52:58,357 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 82 remaining) [2023-11-24 21:52:58,357 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 82 remaining) [2023-11-24 21:52:58,357 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 82 remaining) [2023-11-24 21:52:58,358 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 82 remaining) [2023-11-24 21:52:58,358 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 82 remaining) [2023-11-24 21:52:58,358 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 82 remaining) [2023-11-24 21:52:58,358 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 82 remaining) [2023-11-24 21:52:58,359 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 82 remaining) [2023-11-24 21:52:58,359 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 82 remaining) [2023-11-24 21:52:58,359 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 82 remaining) [2023-11-24 21:52:58,359 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 82 remaining) [2023-11-24 21:52:58,360 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 82 remaining) [2023-11-24 21:52:58,360 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 82 remaining) [2023-11-24 21:52:58,360 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 82 remaining) [2023-11-24 21:52:58,361 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 82 remaining) [2023-11-24 21:52:58,361 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 82 remaining) [2023-11-24 21:52:58,361 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 82 remaining) [2023-11-24 21:52:58,361 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 82 remaining) [2023-11-24 21:52:58,362 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 82 remaining) [2023-11-24 21:52:58,362 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 82 remaining) [2023-11-24 21:52:58,362 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 82 remaining) [2023-11-24 21:52:58,362 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 82 remaining) [2023-11-24 21:52:58,362 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 82 remaining) [2023-11-24 21:52:58,363 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 82 remaining) [2023-11-24 21:52:58,363 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 82 remaining) [2023-11-24 21:52:58,363 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONMEMORY_LEAK (9 of 82 remaining) [2023-11-24 21:52:58,363 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 82 remaining) [2023-11-24 21:52:58,364 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 82 remaining) [2023-11-24 21:52:58,364 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 82 remaining) [2023-11-24 21:52:58,364 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 82 remaining) [2023-11-24 21:52:58,364 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 82 remaining) [2023-11-24 21:52:58,365 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 82 remaining) [2023-11-24 21:52:58,365 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 82 remaining) [2023-11-24 21:52:58,365 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 82 remaining) [2023-11-24 21:52:58,365 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONMEMORY_LEAK (0 of 82 remaining) [2023-11-24 21:52:58,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-24 21:52:58,366 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2023-11-24 21:52:58,367 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-24 21:52:58,367 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-24 21:52:58,490 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-24 21:52:58,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 164 places, 162 transitions, 360 flow [2023-11-24 21:52:58,541 INFO L124 PetriNetUnfolderBase]: 6/142 cut-off events. [2023-11-24 21:52:58,541 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-24 21:52:58,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 160 conditions, 142 events. 6/142 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 587 event pairs, 0 based on Foata normal form. 0/61 useless extension candidates. Maximal degree in co-relation 153. Up to 4 conditions per place. [2023-11-24 21:52:58,542 INFO L82 GeneralOperation]: Start removeDead. Operand has 164 places, 162 transitions, 360 flow [2023-11-24 21:52:58,546 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 123 places, 119 transitions, 259 flow [2023-11-24 21:52:58,548 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 21:52:58,548 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;@1e05055a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 21:52:58,548 INFO L358 AbstractCegarLoop]: Starting to check reachability of 107 error locations. [2023-11-24 21:52:58,550 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-24 21:52:58,550 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-11-24 21:52:58,550 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-24 21:52:58,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:52:58,551 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-24 21:52:58,551 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 104 more)] === [2023-11-24 21:52:58,551 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:52:58,551 INFO L85 PathProgramCache]: Analyzing trace with hash 24557, now seen corresponding path program 1 times [2023-11-24 21:52:58,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:52:58,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575470925] [2023-11-24 21:52:58,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:52:58,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:52:58,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:52:58,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:52:58,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:52:58,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575470925] [2023-11-24 21:52:58,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575470925] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:52:58,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:52:58,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:52:58,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218031290] [2023-11-24 21:52:58,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:52:58,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:52:58,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:52:58,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:52:58,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:52:58,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 162 [2023-11-24 21:52:58,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 119 transitions, 259 flow. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:52:58,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:52:58,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 162 [2023-11-24 21:52:58,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand