./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread-ext/02_inc_cas.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfad498a-4da4-41d2-9432-a82f836312e0/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfad498a-4da4-41d2-9432-a82f836312e0/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfad498a-4da4-41d2-9432-a82f836312e0/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfad498a-4da4-41d2-9432-a82f836312e0/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-ext/02_inc_cas.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfad498a-4da4-41d2-9432-a82f836312e0/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfad498a-4da4-41d2-9432-a82f836312e0/bin/uautomizer-verify-BQ2R08f2Ya --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ede09850ec25b369afc0cd16258beff942f9fc7c5304532be31fd5925a934e14 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 00:15:53,536 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 00:15:53,596 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfad498a-4da4-41d2-9432-a82f836312e0/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-29 00:15:53,601 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 00:15:53,601 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 00:15:53,622 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 00:15:53,623 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 00:15:53,624 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 00:15:53,624 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 00:15:53,625 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 00:15:53,625 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 00:15:53,626 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 00:15:53,627 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 00:15:53,627 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 00:15:53,628 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 00:15:53,628 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 00:15:53,629 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 00:15:53,629 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 00:15:53,630 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 00:15:53,630 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 00:15:53,631 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-29 00:15:53,632 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-29 00:15:53,633 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-29 00:15:53,633 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 00:15:53,634 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-29 00:15:53,634 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-29 00:15:53,635 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 00:15:53,635 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 00:15:53,636 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 00:15:53,636 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 00:15:53,636 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 00:15:53,637 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 00:15:53,637 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 00:15:53,637 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 00:15:53,638 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 00:15:53,638 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 00:15:53,638 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 00:15:53,638 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 00:15:53,638 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 00:15:53,638 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 00:15:53,639 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 00:15:53,639 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_cfad498a-4da4-41d2-9432-a82f836312e0/bin/uautomizer-verify-BQ2R08f2Ya/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfad498a-4da4-41d2-9432-a82f836312e0/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ede09850ec25b369afc0cd16258beff942f9fc7c5304532be31fd5925a934e14 [2023-11-29 00:15:53,856 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 00:15:53,876 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 00:15:53,879 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 00:15:53,880 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 00:15:53,880 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 00:15:53,881 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfad498a-4da4-41d2-9432-a82f836312e0/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/pthread-ext/02_inc_cas.i [2023-11-29 00:15:56,604 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 00:15:56,855 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 00:15:56,856 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfad498a-4da4-41d2-9432-a82f836312e0/sv-benchmarks/c/pthread-ext/02_inc_cas.i [2023-11-29 00:15:56,870 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfad498a-4da4-41d2-9432-a82f836312e0/bin/uautomizer-verify-BQ2R08f2Ya/data/4fa5d87a2/a961d98e359942fb9ce4ab81c746e357/FLAG318e33617 [2023-11-29 00:15:56,881 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfad498a-4da4-41d2-9432-a82f836312e0/bin/uautomizer-verify-BQ2R08f2Ya/data/4fa5d87a2/a961d98e359942fb9ce4ab81c746e357 [2023-11-29 00:15:56,883 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 00:15:56,884 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 00:15:56,885 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 00:15:56,885 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 00:15:56,890 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 00:15:56,890 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 12:15:56" (1/1) ... [2023-11-29 00:15:56,891 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53e5f191 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:15:56, skipping insertion in model container [2023-11-29 00:15:56,891 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 12:15:56" (1/1) ... [2023-11-29 00:15:56,936 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 00:15:57,196 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 00:15:57,205 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 00:15:57,241 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 00:15:57,266 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 00:15:57,266 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 00:15:57,272 INFO L206 MainTranslator]: Completed translation [2023-11-29 00:15:57,272 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:15:57 WrapperNode [2023-11-29 00:15:57,272 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 00:15:57,273 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 00:15:57,273 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 00:15:57,274 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 00:15:57,279 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:15:57" (1/1) ... [2023-11-29 00:15:57,292 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:15:57" (1/1) ... [2023-11-29 00:15:57,313 INFO L138 Inliner]: procedures = 170, calls = 29, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 77 [2023-11-29 00:15:57,314 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 00:15:57,314 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 00:15:57,314 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 00:15:57,315 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 00:15:57,322 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:15:57" (1/1) ... [2023-11-29 00:15:57,323 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:15:57" (1/1) ... [2023-11-29 00:15:57,326 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:15:57" (1/1) ... [2023-11-29 00:15:57,339 INFO L175 MemorySlicer]: Split 11 memory accesses to 4 slices as follows [3, 2, 5, 1]. 45 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [0, 2, 1, 0]. The 4 writes are split as follows [2, 0, 1, 1]. [2023-11-29 00:15:57,340 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:15:57" (1/1) ... [2023-11-29 00:15:57,340 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:15:57" (1/1) ... [2023-11-29 00:15:57,346 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:15:57" (1/1) ... [2023-11-29 00:15:57,350 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:15:57" (1/1) ... [2023-11-29 00:15:57,352 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:15:57" (1/1) ... [2023-11-29 00:15:57,354 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:15:57" (1/1) ... [2023-11-29 00:15:57,357 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 00:15:57,358 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 00:15:57,358 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 00:15:57,358 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 00:15:57,359 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:15:57" (1/1) ... [2023-11-29 00:15:57,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 00:15:57,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfad498a-4da4-41d2-9432-a82f836312e0/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:15:57,384 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfad498a-4da4-41d2-9432-a82f836312e0/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 00:15:57,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cfad498a-4da4-41d2-9432-a82f836312e0/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 00:15:57,411 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 00:15:57,411 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 00:15:57,412 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-29 00:15:57,412 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-29 00:15:57,412 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-11-29 00:15:57,412 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-11-29 00:15:57,412 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 00:15:57,412 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 00:15:57,413 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 00:15:57,413 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-29 00:15:57,413 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-29 00:15:57,413 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 00:15:57,413 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 00:15:57,414 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 00:15:57,414 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 00:15:57,414 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 00:15:57,414 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 00:15:57,414 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-29 00:15:57,414 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-29 00:15:57,415 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 00:15:57,415 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 00:15:57,416 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-29 00:15:57,545 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 00:15:57,547 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 00:15:57,741 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 00:15:57,948 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 00:15:57,948 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-29 00:15:57,949 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 12:15:57 BoogieIcfgContainer [2023-11-29 00:15:57,949 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 00:15:57,951 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 00:15:57,952 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 00:15:57,954 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 00:15:57,954 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 12:15:56" (1/3) ... [2023-11-29 00:15:57,955 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@158c838c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 12:15:57, skipping insertion in model container [2023-11-29 00:15:57,955 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:15:57" (2/3) ... [2023-11-29 00:15:57,955 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@158c838c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 12:15:57, skipping insertion in model container [2023-11-29 00:15:57,956 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 12:15:57" (3/3) ... [2023-11-29 00:15:57,957 INFO L112 eAbstractionObserver]: Analyzing ICFG 02_inc_cas.i [2023-11-29 00:15:57,972 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 00:15:57,972 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2023-11-29 00:15:57,972 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-29 00:15:58,034 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-29 00:15:58,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 38 places, 38 transitions, 80 flow [2023-11-29 00:15:58,092 INFO L124 PetriNetUnfolderBase]: 3/45 cut-off events. [2023-11-29 00:15:58,092 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 00:15:58,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 45 events. 3/45 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 186 event pairs, 0 based on Foata normal form. 0/19 useless extension candidates. Maximal degree in co-relation 35. Up to 2 conditions per place. [2023-11-29 00:15:58,095 INFO L82 GeneralOperation]: Start removeDead. Operand has 38 places, 38 transitions, 80 flow [2023-11-29 00:15:58,099 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 38 places, 38 transitions, 80 flow [2023-11-29 00:15:58,108 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 00:15:58,114 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;@7e89c25a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 00:15:58,114 INFO L358 AbstractCegarLoop]: Starting to check reachability of 34 error locations. [2023-11-29 00:15:58,118 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 00:15:58,118 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-11-29 00:15:58,118 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 00:15:58,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:15:58,119 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-29 00:15:58,120 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-29 00:15:58,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:15:58,124 INFO L85 PathProgramCache]: Analyzing trace with hash 293061, now seen corresponding path program 1 times [2023-11-29 00:15:58,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:15:58,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907953497] [2023-11-29 00:15:58,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:15:58,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:15:58,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:15:58,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:15:58,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:15:58,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907953497] [2023-11-29 00:15:58,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907953497] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:15:58,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:15:58,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 00:15:58,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276124511] [2023-11-29 00:15:58,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:15:58,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:15:58,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:15:58,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:15:58,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:15:58,395 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 38 [2023-11-29 00:15:58,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 38 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:15:58,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:15:58,397 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 38 [2023-11-29 00:15:58,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:15:58,502 INFO L124 PetriNetUnfolderBase]: 61/164 cut-off events. [2023-11-29 00:15:58,502 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 00:15:58,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 311 conditions, 164 events. 61/164 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 690 event pairs, 51 based on Foata normal form. 0/103 useless extension candidates. Maximal degree in co-relation 294. Up to 131 conditions per place. [2023-11-29 00:15:58,507 INFO L140 encePairwiseOnDemand]: 29/38 looper letters, 25 selfloop transitions, 4 changer transitions 0/35 dead transitions. [2023-11-29 00:15:58,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 35 transitions, 132 flow [2023-11-29 00:15:58,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:15:58,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 00:15:58,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 56 transitions. [2023-11-29 00:15:58,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49122807017543857 [2023-11-29 00:15:58,518 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 56 transitions. [2023-11-29 00:15:58,518 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 56 transitions. [2023-11-29 00:15:58,519 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:15:58,521 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 56 transitions. [2023-11-29 00:15:58,522 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 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) [2023-11-29 00:15:58,525 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:15:58,525 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:15:58,527 INFO L175 Difference]: Start difference. First operand has 38 places, 38 transitions, 80 flow. Second operand 3 states and 56 transitions. [2023-11-29 00:15:58,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 35 transitions, 132 flow [2023-11-29 00:15:58,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 35 transitions, 132 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-29 00:15:58,532 INFO L231 Difference]: Finished difference. Result has 37 places, 33 transitions, 90 flow [2023-11-29 00:15:58,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=37, PETRI_TRANSITIONS=33} [2023-11-29 00:15:58,537 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -1 predicate places. [2023-11-29 00:15:58,537 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 33 transitions, 90 flow [2023-11-29 00:15:58,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:15:58,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:15:58,538 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-29 00:15:58,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 00:15:58,538 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-29 00:15:58,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:15:58,539 INFO L85 PathProgramCache]: Analyzing trace with hash 293062, now seen corresponding path program 1 times [2023-11-29 00:15:58,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:15:58,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228121336] [2023-11-29 00:15:58,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:15:58,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:15:58,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:15:58,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:15:58,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:15:58,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228121336] [2023-11-29 00:15:58,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228121336] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:15:58,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:15:58,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 00:15:58,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475024866] [2023-11-29 00:15:58,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:15:58,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:15:58,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:15:58,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:15:58,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:15:58,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 38 [2023-11-29 00:15:58,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 33 transitions, 90 flow. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:15:58,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:15:58,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 38 [2023-11-29 00:15:58,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:15:58,807 INFO L124 PetriNetUnfolderBase]: 81/237 cut-off events. [2023-11-29 00:15:58,807 INFO L125 PetriNetUnfolderBase]: For 31/31 co-relation queries the response was YES. [2023-11-29 00:15:58,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 489 conditions, 237 events. 81/237 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 1231 event pairs, 17 based on Foata normal form. 2/157 useless extension candidates. Maximal degree in co-relation 452. Up to 154 conditions per place. [2023-11-29 00:15:58,811 INFO L140 encePairwiseOnDemand]: 34/38 looper letters, 45 selfloop transitions, 4 changer transitions 0/55 dead transitions. [2023-11-29 00:15:58,811 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 55 transitions, 242 flow [2023-11-29 00:15:58,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:15:58,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 00:15:58,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 70 transitions. [2023-11-29 00:15:58,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6140350877192983 [2023-11-29 00:15:58,813 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 70 transitions. [2023-11-29 00:15:58,813 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 70 transitions. [2023-11-29 00:15:58,814 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:15:58,814 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 70 transitions. [2023-11-29 00:15:58,815 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) [2023-11-29 00:15:58,816 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:15:58,816 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:15:58,816 INFO L175 Difference]: Start difference. First operand has 37 places, 33 transitions, 90 flow. Second operand 3 states and 70 transitions. [2023-11-29 00:15:58,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 55 transitions, 242 flow [2023-11-29 00:15:58,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 55 transitions, 230 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 00:15:58,821 INFO L231 Difference]: Finished difference. Result has 39 places, 34 transitions, 106 flow [2023-11-29 00:15:58,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=39, PETRI_TRANSITIONS=34} [2023-11-29 00:15:58,822 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 1 predicate places. [2023-11-29 00:15:58,822 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 34 transitions, 106 flow [2023-11-29 00:15:58,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:15:58,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:15:58,823 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-29 00:15:58,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 00:15:58,823 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-29 00:15:58,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:15:58,824 INFO L85 PathProgramCache]: Analyzing trace with hash 140907909, now seen corresponding path program 1 times [2023-11-29 00:15:58,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:15:58,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24946208] [2023-11-29 00:15:58,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:15:58,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:15:58,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:15:58,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:15:58,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:15:58,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24946208] [2023-11-29 00:15:58,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24946208] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:15:58,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:15:58,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 00:15:58,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005877188] [2023-11-29 00:15:58,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:15:58,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:15:58,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:15:58,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:15:58,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:15:59,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 38 [2023-11-29 00:15:59,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 34 transitions, 106 flow. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:15:59,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:15:59,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 38 [2023-11-29 00:15:59,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:15:59,083 INFO L124 PetriNetUnfolderBase]: 39/131 cut-off events. [2023-11-29 00:15:59,083 INFO L125 PetriNetUnfolderBase]: For 20/23 co-relation queries the response was YES. [2023-11-29 00:15:59,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 278 conditions, 131 events. 39/131 cut-off events. For 20/23 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 566 event pairs, 28 based on Foata normal form. 0/86 useless extension candidates. Maximal degree in co-relation 255. Up to 93 conditions per place. [2023-11-29 00:15:59,085 INFO L140 encePairwiseOnDemand]: 32/38 looper letters, 21 selfloop transitions, 3 changer transitions 0/33 dead transitions. [2023-11-29 00:15:59,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 33 transitions, 152 flow [2023-11-29 00:15:59,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:15:59,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 00:15:59,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 51 transitions. [2023-11-29 00:15:59,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4473684210526316 [2023-11-29 00:15:59,087 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 51 transitions. [2023-11-29 00:15:59,087 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 51 transitions. [2023-11-29 00:15:59,087 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:15:59,087 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 51 transitions. [2023-11-29 00:15:59,088 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:15:59,088 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:15:59,089 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:15:59,089 INFO L175 Difference]: Start difference. First operand has 39 places, 34 transitions, 106 flow. Second operand 3 states and 51 transitions. [2023-11-29 00:15:59,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 33 transitions, 152 flow [2023-11-29 00:15:59,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 33 transitions, 144 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 00:15:59,092 INFO L231 Difference]: Finished difference. Result has 36 places, 31 transitions, 98 flow [2023-11-29 00:15:59,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=36, PETRI_TRANSITIONS=31} [2023-11-29 00:15:59,093 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -2 predicate places. [2023-11-29 00:15:59,093 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 31 transitions, 98 flow [2023-11-29 00:15:59,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:15:59,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:15:59,093 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-29 00:15:59,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-29 00:15:59,094 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-29 00:15:59,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:15:59,094 INFO L85 PathProgramCache]: Analyzing trace with hash 140907910, now seen corresponding path program 1 times [2023-11-29 00:15:59,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:15:59,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88926988] [2023-11-29 00:15:59,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:15:59,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:15:59,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:15:59,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:15:59,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:15:59,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88926988] [2023-11-29 00:15:59,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88926988] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:15:59,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:15:59,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:15:59,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152815087] [2023-11-29 00:15:59,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:15:59,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 00:15:59,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:15:59,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 00:15:59,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:15:59,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 38 [2023-11-29 00:15:59,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 31 transitions, 98 flow. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:15:59,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:15:59,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 38 [2023-11-29 00:15:59,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:15:59,311 INFO L124 PetriNetUnfolderBase]: 33/113 cut-off events. [2023-11-29 00:15:59,311 INFO L125 PetriNetUnfolderBase]: For 21/23 co-relation queries the response was YES. [2023-11-29 00:15:59,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 245 conditions, 113 events. 33/113 cut-off events. For 21/23 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 468 event pairs, 24 based on Foata normal form. 0/80 useless extension candidates. Maximal degree in co-relation 222. Up to 87 conditions per place. [2023-11-29 00:15:59,312 INFO L140 encePairwiseOnDemand]: 34/38 looper letters, 17 selfloop transitions, 1 changer transitions 0/28 dead transitions. [2023-11-29 00:15:59,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 28 transitions, 128 flow [2023-11-29 00:15:59,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:15:59,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 00:15:59,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 48 transitions. [2023-11-29 00:15:59,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42105263157894735 [2023-11-29 00:15:59,314 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 48 transitions. [2023-11-29 00:15:59,314 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 48 transitions. [2023-11-29 00:15:59,315 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:15:59,315 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 48 transitions. [2023-11-29 00:15:59,315 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:15:59,316 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:15:59,316 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:15:59,317 INFO L175 Difference]: Start difference. First operand has 36 places, 31 transitions, 98 flow. Second operand 3 states and 48 transitions. [2023-11-29 00:15:59,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 28 transitions, 128 flow [2023-11-29 00:15:59,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 28 transitions, 122 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 00:15:59,319 INFO L231 Difference]: Finished difference. Result has 33 places, 28 transitions, 88 flow [2023-11-29 00:15:59,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=31, 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=88, PETRI_PLACES=33, PETRI_TRANSITIONS=28} [2023-11-29 00:15:59,320 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -5 predicate places. [2023-11-29 00:15:59,320 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 28 transitions, 88 flow [2023-11-29 00:15:59,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:15:59,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:15:59,321 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1] [2023-11-29 00:15:59,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-29 00:15:59,321 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-11-29 00:15:59,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:15:59,321 INFO L85 PathProgramCache]: Analyzing trace with hash -2027248771, now seen corresponding path program 1 times [2023-11-29 00:15:59,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:15:59,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665385370] [2023-11-29 00:15:59,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:15:59,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:15:59,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 00:15:59,337 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-29 00:15:59,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 00:15:59,359 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-29 00:15:59,359 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-29 00:15:59,360 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (33 of 34 remaining) [2023-11-29 00:15:59,362 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 34 remaining) [2023-11-29 00:15:59,362 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 34 remaining) [2023-11-29 00:15:59,363 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 34 remaining) [2023-11-29 00:15:59,363 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 34 remaining) [2023-11-29 00:15:59,363 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14ASSERT_VIOLATIONMEMORY_LEAK (28 of 34 remaining) [2023-11-29 00:15:59,363 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 34 remaining) [2023-11-29 00:15:59,363 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 34 remaining) [2023-11-29 00:15:59,364 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 34 remaining) [2023-11-29 00:15:59,364 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 34 remaining) [2023-11-29 00:15:59,364 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 34 remaining) [2023-11-29 00:15:59,364 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 34 remaining) [2023-11-29 00:15:59,365 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 34 remaining) [2023-11-29 00:15:59,365 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 34 remaining) [2023-11-29 00:15:59,365 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 34 remaining) [2023-11-29 00:15:59,365 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 34 remaining) [2023-11-29 00:15:59,365 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 34 remaining) [2023-11-29 00:15:59,366 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 34 remaining) [2023-11-29 00:15:59,366 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (15 of 34 remaining) [2023-11-29 00:15:59,366 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 34 remaining) [2023-11-29 00:15:59,366 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 34 remaining) [2023-11-29 00:15:59,366 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 34 remaining) [2023-11-29 00:15:59,367 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 34 remaining) [2023-11-29 00:15:59,367 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14ASSERT_VIOLATIONMEMORY_LEAK (10 of 34 remaining) [2023-11-29 00:15:59,367 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 34 remaining) [2023-11-29 00:15:59,367 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 34 remaining) [2023-11-29 00:15:59,368 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 34 remaining) [2023-11-29 00:15:59,368 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 34 remaining) [2023-11-29 00:15:59,368 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 34 remaining) [2023-11-29 00:15:59,368 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 34 remaining) [2023-11-29 00:15:59,368 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 34 remaining) [2023-11-29 00:15:59,369 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 34 remaining) [2023-11-29 00:15:59,369 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 34 remaining) [2023-11-29 00:15:59,369 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 34 remaining) [2023-11-29 00:15:59,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-29 00:15:59,370 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-11-29 00:15:59,372 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-29 00:15:59,372 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-29 00:15:59,432 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-29 00:15:59,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 65 places, 66 transitions, 142 flow [2023-11-29 00:15:59,446 INFO L124 PetriNetUnfolderBase]: 6/81 cut-off events. [2023-11-29 00:15:59,446 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-29 00:15:59,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89 conditions, 81 events. 6/81 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 351 event pairs, 0 based on Foata normal form. 0/33 useless extension candidates. Maximal degree in co-relation 62. Up to 3 conditions per place. [2023-11-29 00:15:59,447 INFO L82 GeneralOperation]: Start removeDead. Operand has 65 places, 66 transitions, 142 flow [2023-11-29 00:15:59,449 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 65 places, 66 transitions, 142 flow [2023-11-29 00:15:59,450 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 00:15:59,451 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;@7e89c25a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 00:15:59,452 INFO L358 AbstractCegarLoop]: Starting to check reachability of 49 error locations. [2023-11-29 00:15:59,453 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 00:15:59,453 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-11-29 00:15:59,453 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 00:15:59,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:15:59,453 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-29 00:15:59,454 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-11-29 00:15:59,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:15:59,454 INFO L85 PathProgramCache]: Analyzing trace with hash 358599, now seen corresponding path program 1 times [2023-11-29 00:15:59,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:15:59,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694682258] [2023-11-29 00:15:59,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:15:59,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:15:59,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:15:59,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:15:59,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:15:59,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694682258] [2023-11-29 00:15:59,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694682258] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:15:59,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:15:59,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 00:15:59,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124076856] [2023-11-29 00:15:59,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:15:59,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:15:59,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:15:59,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:15:59,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:15:59,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 66 [2023-11-29 00:15:59,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 66 transitions, 142 flow. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:15:59,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:15:59,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 66 [2023-11-29 00:15:59,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:16:00,260 INFO L124 PetriNetUnfolderBase]: 2863/4953 cut-off events. [2023-11-29 00:16:00,260 INFO L125 PetriNetUnfolderBase]: For 76/76 co-relation queries the response was YES. [2023-11-29 00:16:00,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9535 conditions, 4953 events. 2863/4953 cut-off events. For 76/76 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 31913 event pairs, 2280 based on Foata normal form. 0/2624 useless extension candidates. Maximal degree in co-relation 5993. Up to 3895 conditions per place. [2023-11-29 00:16:00,304 INFO L140 encePairwiseOnDemand]: 52/66 looper letters, 85 selfloop transitions, 6 changer transitions 0/101 dead transitions. [2023-11-29 00:16:00,304 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 101 transitions, 399 flow [2023-11-29 00:16:00,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:16:00,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 00:16:00,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 139 transitions. [2023-11-29 00:16:00,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.702020202020202 [2023-11-29 00:16:00,306 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 139 transitions. [2023-11-29 00:16:00,307 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 139 transitions. [2023-11-29 00:16:00,307 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:16:00,307 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 139 transitions. [2023-11-29 00:16:00,308 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:16:00,309 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 66.0) internal successors, (264), 4 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:16:00,309 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 66.0) internal successors, (264), 4 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:16:00,309 INFO L175 Difference]: Start difference. First operand has 65 places, 66 transitions, 142 flow. Second operand 3 states and 139 transitions. [2023-11-29 00:16:00,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 101 transitions, 399 flow [2023-11-29 00:16:00,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 101 transitions, 399 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-29 00:16:00,313 INFO L231 Difference]: Finished difference. Result has 62 places, 62 transitions, 170 flow [2023-11-29 00:16:00,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=170, PETRI_PLACES=62, PETRI_TRANSITIONS=62} [2023-11-29 00:16:00,314 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -3 predicate places. [2023-11-29 00:16:00,314 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 62 transitions, 170 flow [2023-11-29 00:16:00,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:16:00,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:16:00,315 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-29 00:16:00,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-29 00:16:00,315 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-11-29 00:16:00,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:16:00,315 INFO L85 PathProgramCache]: Analyzing trace with hash 358600, now seen corresponding path program 1 times [2023-11-29 00:16:00,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:16:00,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683501657] [2023-11-29 00:16:00,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:16:00,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:16:00,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:16:00,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:16:00,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:16:00,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683501657] [2023-11-29 00:16:00,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683501657] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:16:00,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:16:00,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 00:16:00,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603024417] [2023-11-29 00:16:00,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:16:00,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:16:00,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:16:00,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:16:00,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:16:00,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 66 [2023-11-29 00:16:00,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 62 transitions, 170 flow. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:16:00,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:16:00,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 66 [2023-11-29 00:16:00,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:16:01,535 INFO L124 PetriNetUnfolderBase]: 4155/7467 cut-off events. [2023-11-29 00:16:01,535 INFO L125 PetriNetUnfolderBase]: For 1687/1707 co-relation queries the response was YES. [2023-11-29 00:16:01,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15656 conditions, 7467 events. 4155/7467 cut-off events. For 1687/1707 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 55048 event pairs, 1938 based on Foata normal form. 22/4324 useless extension candidates. Maximal degree in co-relation 13922. Up to 5314 conditions per place. [2023-11-29 00:16:01,595 INFO L140 encePairwiseOnDemand]: 61/66 looper letters, 96 selfloop transitions, 5 changer transitions 0/111 dead transitions. [2023-11-29 00:16:01,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 111 transitions, 505 flow [2023-11-29 00:16:01,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:16:01,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 00:16:01,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 125 transitions. [2023-11-29 00:16:01,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6313131313131313 [2023-11-29 00:16:01,597 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 125 transitions. [2023-11-29 00:16:01,597 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 125 transitions. [2023-11-29 00:16:01,597 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:16:01,598 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 125 transitions. [2023-11-29 00:16:01,598 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:16:01,599 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 66.0) internal successors, (264), 4 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:16:01,600 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 66.0) internal successors, (264), 4 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:16:01,600 INFO L175 Difference]: Start difference. First operand has 62 places, 62 transitions, 170 flow. Second operand 3 states and 125 transitions. [2023-11-29 00:16:01,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 111 transitions, 505 flow [2023-11-29 00:16:01,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 111 transitions, 483 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 00:16:01,668 INFO L231 Difference]: Finished difference. Result has 64 places, 66 transitions, 200 flow [2023-11-29 00:16:01,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=200, PETRI_PLACES=64, PETRI_TRANSITIONS=66} [2023-11-29 00:16:01,669 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -1 predicate places. [2023-11-29 00:16:01,669 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 66 transitions, 200 flow [2023-11-29 00:16:01,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:16:01,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:16:01,669 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-29 00:16:01,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-29 00:16:01,669 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-11-29 00:16:01,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:16:01,670 INFO L85 PathProgramCache]: Analyzing trace with hash 2093442816, now seen corresponding path program 1 times [2023-11-29 00:16:01,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:16:01,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611540825] [2023-11-29 00:16:01,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:16:01,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:16:01,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:16:01,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:16:01,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:16:01,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611540825] [2023-11-29 00:16:01,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611540825] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:16:01,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:16:01,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 00:16:01,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393106747] [2023-11-29 00:16:01,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:16:01,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:16:01,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:16:01,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:16:01,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:16:01,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 66 [2023-11-29 00:16:01,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 66 transitions, 200 flow. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:16:01,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:16:01,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 66 [2023-11-29 00:16:01,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:16:02,416 INFO L124 PetriNetUnfolderBase]: 2310/4436 cut-off events. [2023-11-29 00:16:02,416 INFO L125 PetriNetUnfolderBase]: For 872/876 co-relation queries the response was YES. [2023-11-29 00:16:02,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9363 conditions, 4436 events. 2310/4436 cut-off events. For 872/876 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 32460 event pairs, 1492 based on Foata normal form. 0/2546 useless extension candidates. Maximal degree in co-relation 6028. Up to 2932 conditions per place. [2023-11-29 00:16:02,446 INFO L140 encePairwiseOnDemand]: 55/66 looper letters, 86 selfloop transitions, 5 changer transitions 0/105 dead transitions. [2023-11-29 00:16:02,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 105 transitions, 485 flow [2023-11-29 00:16:02,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:16:02,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 00:16:02,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 125 transitions. [2023-11-29 00:16:02,448 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6313131313131313 [2023-11-29 00:16:02,448 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 125 transitions. [2023-11-29 00:16:02,448 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 125 transitions. [2023-11-29 00:16:02,448 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:16:02,448 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 125 transitions. [2023-11-29 00:16:02,449 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:16:02,450 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 66.0) internal successors, (264), 4 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:16:02,450 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 66.0) internal successors, (264), 4 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:16:02,450 INFO L175 Difference]: Start difference. First operand has 64 places, 66 transitions, 200 flow. Second operand 3 states and 125 transitions. [2023-11-29 00:16:02,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 105 transitions, 485 flow [2023-11-29 00:16:02,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 105 transitions, 471 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 00:16:02,455 INFO L231 Difference]: Finished difference. Result has 65 places, 70 transitions, 241 flow [2023-11-29 00:16:02,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=241, PETRI_PLACES=65, PETRI_TRANSITIONS=70} [2023-11-29 00:16:02,456 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 0 predicate places. [2023-11-29 00:16:02,456 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 70 transitions, 241 flow [2023-11-29 00:16:02,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:16:02,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:16:02,457 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-29 00:16:02,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-29 00:16:02,457 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-11-29 00:16:02,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:16:02,457 INFO L85 PathProgramCache]: Analyzing trace with hash 2093442817, now seen corresponding path program 1 times [2023-11-29 00:16:02,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:16:02,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145907153] [2023-11-29 00:16:02,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:16:02,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:16:02,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:16:02,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:16:02,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:16:02,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145907153] [2023-11-29 00:16:02,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145907153] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:16:02,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:16:02,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:16:02,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071271503] [2023-11-29 00:16:02,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:16:02,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 00:16:02,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:16:02,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 00:16:02,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:16:02,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 66 [2023-11-29 00:16:02,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 70 transitions, 241 flow. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:16:02,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:16:02,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 66 [2023-11-29 00:16:02,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:16:03,129 INFO L124 PetriNetUnfolderBase]: 1582/3026 cut-off events. [2023-11-29 00:16:03,130 INFO L125 PetriNetUnfolderBase]: For 900/904 co-relation queries the response was YES. [2023-11-29 00:16:03,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7033 conditions, 3026 events. 1582/3026 cut-off events. For 900/904 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 20424 event pairs, 1133 based on Foata normal form. 0/1940 useless extension candidates. Maximal degree in co-relation 4379. Up to 2611 conditions per place. [2023-11-29 00:16:03,153 INFO L140 encePairwiseOnDemand]: 59/66 looper letters, 48 selfloop transitions, 1 changer transitions 0/64 dead transitions. [2023-11-29 00:16:03,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 64 transitions, 327 flow [2023-11-29 00:16:03,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:16:03,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 00:16:03,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 84 transitions. [2023-11-29 00:16:03,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42424242424242425 [2023-11-29 00:16:03,155 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 84 transitions. [2023-11-29 00:16:03,155 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 84 transitions. [2023-11-29 00:16:03,155 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:16:03,155 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 84 transitions. [2023-11-29 00:16:03,156 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) [2023-11-29 00:16:03,157 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 66.0) internal successors, (264), 4 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:16:03,157 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 66.0) internal successors, (264), 4 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:16:03,157 INFO L175 Difference]: Start difference. First operand has 65 places, 70 transitions, 241 flow. Second operand 3 states and 84 transitions. [2023-11-29 00:16:03,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 64 transitions, 327 flow [2023-11-29 00:16:03,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 64 transitions, 322 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 00:16:03,163 INFO L231 Difference]: Finished difference. Result has 60 places, 64 transitions, 226 flow [2023-11-29 00:16:03,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=226, PETRI_PLACES=60, PETRI_TRANSITIONS=64} [2023-11-29 00:16:03,164 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -5 predicate places. [2023-11-29 00:16:03,164 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 64 transitions, 226 flow [2023-11-29 00:16:03,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:16:03,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:16:03,165 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-11-29 00:16:03,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-29 00:16:03,165 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-11-29 00:16:03,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:16:03,165 INFO L85 PathProgramCache]: Analyzing trace with hash 1752229410, now seen corresponding path program 1 times [2023-11-29 00:16:03,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:16:03,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355197042] [2023-11-29 00:16:03,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:16:03,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:16:03,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:16:03,282 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:16:03,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:16:03,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355197042] [2023-11-29 00:16:03,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355197042] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:16:03,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:16:03,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 00:16:03,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070375606] [2023-11-29 00:16:03,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:16:03,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:16:03,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:16:03,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:16:03,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:16:03,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 66 [2023-11-29 00:16:03,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 64 transitions, 226 flow. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:16:03,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:16:03,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 66 [2023-11-29 00:16:03,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:16:04,017 INFO L124 PetriNetUnfolderBase]: 1900/3634 cut-off events. [2023-11-29 00:16:04,017 INFO L125 PetriNetUnfolderBase]: For 1637/1637 co-relation queries the response was YES. [2023-11-29 00:16:04,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8353 conditions, 3634 events. 1900/3634 cut-off events. For 1637/1637 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 25322 event pairs, 1133 based on Foata normal form. 200/2698 useless extension candidates. Maximal degree in co-relation 8339. Up to 2302 conditions per place. [2023-11-29 00:16:04,038 INFO L140 encePairwiseOnDemand]: 57/66 looper letters, 110 selfloop transitions, 16 changer transitions 0/135 dead transitions. [2023-11-29 00:16:04,039 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 135 transitions, 671 flow [2023-11-29 00:16:04,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 00:16:04,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 00:16:04,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 158 transitions. [2023-11-29 00:16:04,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5984848484848485 [2023-11-29 00:16:04,040 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 158 transitions. [2023-11-29 00:16:04,040 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 158 transitions. [2023-11-29 00:16:04,040 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:16:04,041 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 158 transitions. [2023-11-29 00:16:04,041 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 39.5) internal successors, (158), 4 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:16:04,042 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 66.0) internal successors, (330), 5 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:16:04,042 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 66.0) internal successors, (330), 5 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:16:04,042 INFO L175 Difference]: Start difference. First operand has 60 places, 64 transitions, 226 flow. Second operand 4 states and 158 transitions. [2023-11-29 00:16:04,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 135 transitions, 671 flow [2023-11-29 00:16:04,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 135 transitions, 670 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 00:16:04,047 INFO L231 Difference]: Finished difference. Result has 64 places, 69 transitions, 317 flow [2023-11-29 00:16:04,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=225, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=317, PETRI_PLACES=64, PETRI_TRANSITIONS=69} [2023-11-29 00:16:04,048 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -1 predicate places. [2023-11-29 00:16:04,049 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 69 transitions, 317 flow [2023-11-29 00:16:04,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:16:04,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:16:04,049 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:16:04,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-29 00:16:04,049 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-11-29 00:16:04,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:16:04,050 INFO L85 PathProgramCache]: Analyzing trace with hash 1753865385, now seen corresponding path program 1 times [2023-11-29 00:16:04,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:16:04,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059422767] [2023-11-29 00:16:04,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:16:04,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:16:04,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:16:04,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:16:04,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:16:04,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059422767] [2023-11-29 00:16:04,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059422767] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:16:04,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:16:04,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 00:16:04,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326822239] [2023-11-29 00:16:04,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:16:04,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:16:04,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:16:04,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:16:04,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:16:04,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 66 [2023-11-29 00:16:04,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 69 transitions, 317 flow. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:16:04,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:16:04,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 66 [2023-11-29 00:16:04,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:16:04,546 INFO L124 PetriNetUnfolderBase]: 1419/2762 cut-off events. [2023-11-29 00:16:04,546 INFO L125 PetriNetUnfolderBase]: For 2683/2697 co-relation queries the response was YES. [2023-11-29 00:16:04,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6983 conditions, 2762 events. 1419/2762 cut-off events. For 2683/2697 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 18469 event pairs, 575 based on Foata normal form. 0/1948 useless extension candidates. Maximal degree in co-relation 6966. Up to 1640 conditions per place. [2023-11-29 00:16:04,563 INFO L140 encePairwiseOnDemand]: 56/66 looper letters, 75 selfloop transitions, 14 changer transitions 0/103 dead transitions. [2023-11-29 00:16:04,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 103 transitions, 614 flow [2023-11-29 00:16:04,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:16:04,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 00:16:04,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 109 transitions. [2023-11-29 00:16:04,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5505050505050505 [2023-11-29 00:16:04,565 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 109 transitions. [2023-11-29 00:16:04,565 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 109 transitions. [2023-11-29 00:16:04,565 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:16:04,565 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 109 transitions. [2023-11-29 00:16:04,566 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) [2023-11-29 00:16:04,566 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 66.0) internal successors, (264), 4 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:16:04,567 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 66.0) internal successors, (264), 4 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:16:04,567 INFO L175 Difference]: Start difference. First operand has 64 places, 69 transitions, 317 flow. Second operand 3 states and 109 transitions. [2023-11-29 00:16:04,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 103 transitions, 614 flow [2023-11-29 00:16:04,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 103 transitions, 598 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 00:16:04,574 INFO L231 Difference]: Finished difference. Result has 67 places, 77 transitions, 431 flow [2023-11-29 00:16:04,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=305, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=431, PETRI_PLACES=67, PETRI_TRANSITIONS=77} [2023-11-29 00:16:04,575 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 2 predicate places. [2023-11-29 00:16:04,575 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 77 transitions, 431 flow [2023-11-29 00:16:04,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:16:04,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:16:04,575 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:16:04,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-29 00:16:04,576 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-11-29 00:16:04,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:16:04,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1753865388, now seen corresponding path program 1 times [2023-11-29 00:16:04,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:16:04,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533890140] [2023-11-29 00:16:04,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:16:04,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:16:04,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:16:04,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:16:04,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:16:04,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533890140] [2023-11-29 00:16:04,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533890140] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:16:04,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:16:04,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 00:16:04,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445812034] [2023-11-29 00:16:04,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:16:04,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:16:04,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:16:04,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:16:04,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:16:04,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 66 [2023-11-29 00:16:04,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 77 transitions, 431 flow. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:16:04,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:16:04,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 66 [2023-11-29 00:16:04,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:16:05,015 INFO L124 PetriNetUnfolderBase]: 1132/2238 cut-off events. [2023-11-29 00:16:05,015 INFO L125 PetriNetUnfolderBase]: For 3974/3988 co-relation queries the response was YES. [2023-11-29 00:16:05,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6550 conditions, 2238 events. 1132/2238 cut-off events. For 3974/3988 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 14690 event pairs, 427 based on Foata normal form. 140/1809 useless extension candidates. Maximal degree in co-relation 6532. Up to 1340 conditions per place. [2023-11-29 00:16:05,031 INFO L140 encePairwiseOnDemand]: 60/66 looper letters, 59 selfloop transitions, 14 changer transitions 0/89 dead transitions. [2023-11-29 00:16:05,031 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 89 transitions, 610 flow [2023-11-29 00:16:05,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:16:05,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 00:16:05,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 93 transitions. [2023-11-29 00:16:05,032 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4696969696969697 [2023-11-29 00:16:05,032 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 93 transitions. [2023-11-29 00:16:05,032 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 93 transitions. [2023-11-29 00:16:05,032 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:16:05,032 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 93 transitions. [2023-11-29 00:16:05,033 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) [2023-11-29 00:16:05,033 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 66.0) internal successors, (264), 4 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:16:05,034 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 66.0) internal successors, (264), 4 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:16:05,034 INFO L175 Difference]: Start difference. First operand has 67 places, 77 transitions, 431 flow. Second operand 3 states and 93 transitions. [2023-11-29 00:16:05,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 89 transitions, 610 flow [2023-11-29 00:16:05,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 89 transitions, 582 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 00:16:05,040 INFO L231 Difference]: Finished difference. Result has 64 places, 74 transitions, 425 flow [2023-11-29 00:16:05,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=397, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=425, PETRI_PLACES=64, PETRI_TRANSITIONS=74} [2023-11-29 00:16:05,041 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -1 predicate places. [2023-11-29 00:16:05,041 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 74 transitions, 425 flow [2023-11-29 00:16:05,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:16:05,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:16:05,041 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:16:05,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-29 00:16:05,041 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-11-29 00:16:05,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:16:05,042 INFO L85 PathProgramCache]: Analyzing trace with hash 265354331, now seen corresponding path program 1 times [2023-11-29 00:16:05,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:16:05,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408925533] [2023-11-29 00:16:05,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:16:05,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:16:05,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:16:05,096 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:16:05,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:16:05,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408925533] [2023-11-29 00:16:05,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408925533] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:16:05,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:16:05,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:16:05,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104742071] [2023-11-29 00:16:05,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:16:05,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:16:05,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:16:05,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:16:05,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:16:05,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 66 [2023-11-29 00:16:05,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 74 transitions, 425 flow. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 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) [2023-11-29 00:16:05,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:16:05,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 66 [2023-11-29 00:16:05,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:16:05,732 INFO L124 PetriNetUnfolderBase]: 2265/4564 cut-off events. [2023-11-29 00:16:05,732 INFO L125 PetriNetUnfolderBase]: For 6925/6951 co-relation queries the response was YES. [2023-11-29 00:16:05,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12556 conditions, 4564 events. 2265/4564 cut-off events. For 6925/6951 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 34969 event pairs, 344 based on Foata normal form. 104/3548 useless extension candidates. Maximal degree in co-relation 12538. Up to 2002 conditions per place. [2023-11-29 00:16:05,753 INFO L140 encePairwiseOnDemand]: 57/66 looper letters, 129 selfloop transitions, 12 changer transitions 0/157 dead transitions. [2023-11-29 00:16:05,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 157 transitions, 1094 flow [2023-11-29 00:16:05,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 00:16:05,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 00:16:05,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 169 transitions. [2023-11-29 00:16:05,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121212121212121 [2023-11-29 00:16:05,754 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 169 transitions. [2023-11-29 00:16:05,754 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 169 transitions. [2023-11-29 00:16:05,755 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:16:05,755 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 169 transitions. [2023-11-29 00:16:05,755 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 33.8) internal successors, (169), 5 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:16:05,756 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 66.0) internal successors, (396), 6 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:16:05,756 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 66.0) internal successors, (396), 6 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:16:05,756 INFO L175 Difference]: Start difference. First operand has 64 places, 74 transitions, 425 flow. Second operand 5 states and 169 transitions. [2023-11-29 00:16:05,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 157 transitions, 1094 flow [2023-11-29 00:16:05,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 157 transitions, 1048 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 00:16:05,771 INFO L231 Difference]: Finished difference. Result has 69 places, 85 transitions, 506 flow [2023-11-29 00:16:05,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=397, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=506, PETRI_PLACES=69, PETRI_TRANSITIONS=85} [2023-11-29 00:16:05,772 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 4 predicate places. [2023-11-29 00:16:05,772 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 85 transitions, 506 flow [2023-11-29 00:16:05,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 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) [2023-11-29 00:16:05,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:16:05,772 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:16:05,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-29 00:16:05,772 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thr1Err14ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-11-29 00:16:05,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:16:05,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1127027263, now seen corresponding path program 1 times [2023-11-29 00:16:05,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:16:05,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709703859] [2023-11-29 00:16:05,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:16:05,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:16:05,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:16:06,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:16:06,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:16:06,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709703859] [2023-11-29 00:16:06,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709703859] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:16:06,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:16:06,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 00:16:06,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237407898] [2023-11-29 00:16:06,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:16:06,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 00:16:06,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:16:06,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 00:16:06,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-29 00:16:06,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 66 [2023-11-29 00:16:06,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 85 transitions, 506 flow. Second operand has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:16:06,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:16:06,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 66 [2023-11-29 00:16:06,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:16:07,291 INFO L124 PetriNetUnfolderBase]: 3744/7506 cut-off events. [2023-11-29 00:16:07,292 INFO L125 PetriNetUnfolderBase]: For 7933/7960 co-relation queries the response was YES. [2023-11-29 00:16:07,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21709 conditions, 7506 events. 3744/7506 cut-off events. For 7933/7960 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 59591 event pairs, 517 based on Foata normal form. 6/5917 useless extension candidates. Maximal degree in co-relation 21687. Up to 2941 conditions per place. [2023-11-29 00:16:07,328 INFO L140 encePairwiseOnDemand]: 55/66 looper letters, 154 selfloop transitions, 24 changer transitions 0/192 dead transitions. [2023-11-29 00:16:07,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 192 transitions, 1370 flow [2023-11-29 00:16:07,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 00:16:07,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 00:16:07,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 195 transitions. [2023-11-29 00:16:07,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49242424242424243 [2023-11-29 00:16:07,330 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 195 transitions. [2023-11-29 00:16:07,330 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 195 transitions. [2023-11-29 00:16:07,331 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:16:07,331 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 195 transitions. [2023-11-29 00:16:07,331 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 32.5) internal successors, (195), 6 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:16:07,332 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 66.0) internal successors, (462), 7 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:16:07,333 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 66.0) internal successors, (462), 7 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:16:07,333 INFO L175 Difference]: Start difference. First operand has 69 places, 85 transitions, 506 flow. Second operand 6 states and 195 transitions. [2023-11-29 00:16:07,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 192 transitions, 1370 flow [2023-11-29 00:16:07,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 192 transitions, 1370 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-29 00:16:07,342 INFO L231 Difference]: Finished difference. Result has 77 places, 104 transitions, 700 flow [2023-11-29 00:16:07,342 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=506, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=700, PETRI_PLACES=77, PETRI_TRANSITIONS=104} [2023-11-29 00:16:07,343 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 12 predicate places. [2023-11-29 00:16:07,343 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 104 transitions, 700 flow [2023-11-29 00:16:07,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:16:07,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:16:07,344 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1] [2023-11-29 00:16:07,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-29 00:16:07,344 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-11-29 00:16:07,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:16:07,344 INFO L85 PathProgramCache]: Analyzing trace with hash -94082710, now seen corresponding path program 1 times [2023-11-29 00:16:07,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:16:07,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125309634] [2023-11-29 00:16:07,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:16:07,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:16:07,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 00:16:07,354 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-29 00:16:07,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 00:16:07,364 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-29 00:16:07,364 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-29 00:16:07,365 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (48 of 49 remaining) [2023-11-29 00:16:07,365 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 49 remaining) [2023-11-29 00:16:07,365 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 49 remaining) [2023-11-29 00:16:07,365 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 49 remaining) [2023-11-29 00:16:07,365 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 49 remaining) [2023-11-29 00:16:07,365 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14ASSERT_VIOLATIONMEMORY_LEAK (43 of 49 remaining) [2023-11-29 00:16:07,366 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 49 remaining) [2023-11-29 00:16:07,366 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 49 remaining) [2023-11-29 00:16:07,366 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 49 remaining) [2023-11-29 00:16:07,366 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 49 remaining) [2023-11-29 00:16:07,366 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 49 remaining) [2023-11-29 00:16:07,366 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 49 remaining) [2023-11-29 00:16:07,366 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 49 remaining) [2023-11-29 00:16:07,366 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 49 remaining) [2023-11-29 00:16:07,366 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 49 remaining) [2023-11-29 00:16:07,367 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 49 remaining) [2023-11-29 00:16:07,367 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 49 remaining) [2023-11-29 00:16:07,367 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 49 remaining) [2023-11-29 00:16:07,367 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (30 of 49 remaining) [2023-11-29 00:16:07,367 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 49 remaining) [2023-11-29 00:16:07,367 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 49 remaining) [2023-11-29 00:16:07,367 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 49 remaining) [2023-11-29 00:16:07,367 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 49 remaining) [2023-11-29 00:16:07,367 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14ASSERT_VIOLATIONMEMORY_LEAK (25 of 49 remaining) [2023-11-29 00:16:07,368 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 49 remaining) [2023-11-29 00:16:07,368 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 49 remaining) [2023-11-29 00:16:07,368 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 49 remaining) [2023-11-29 00:16:07,368 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 49 remaining) [2023-11-29 00:16:07,368 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 49 remaining) [2023-11-29 00:16:07,368 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 49 remaining) [2023-11-29 00:16:07,368 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 49 remaining) [2023-11-29 00:16:07,368 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 49 remaining) [2023-11-29 00:16:07,368 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 49 remaining) [2023-11-29 00:16:07,369 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 49 remaining) [2023-11-29 00:16:07,369 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 49 remaining) [2023-11-29 00:16:07,369 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 49 remaining) [2023-11-29 00:16:07,369 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 49 remaining) [2023-11-29 00:16:07,369 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 49 remaining) [2023-11-29 00:16:07,369 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14ASSERT_VIOLATIONMEMORY_LEAK (10 of 49 remaining) [2023-11-29 00:16:07,369 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 49 remaining) [2023-11-29 00:16:07,369 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 49 remaining) [2023-11-29 00:16:07,369 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 49 remaining) [2023-11-29 00:16:07,370 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 49 remaining) [2023-11-29 00:16:07,370 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 49 remaining) [2023-11-29 00:16:07,370 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 49 remaining) [2023-11-29 00:16:07,370 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 49 remaining) [2023-11-29 00:16:07,370 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 49 remaining) [2023-11-29 00:16:07,370 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 49 remaining) [2023-11-29 00:16:07,370 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 49 remaining) [2023-11-29 00:16:07,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-29 00:16:07,371 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:16:07,371 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-29 00:16:07,371 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-29 00:16:07,429 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-29 00:16:07,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 92 places, 94 transitions, 206 flow [2023-11-29 00:16:07,441 INFO L124 PetriNetUnfolderBase]: 9/117 cut-off events. [2023-11-29 00:16:07,441 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-29 00:16:07,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130 conditions, 117 events. 9/117 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 517 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 89. Up to 4 conditions per place. [2023-11-29 00:16:07,442 INFO L82 GeneralOperation]: Start removeDead. Operand has 92 places, 94 transitions, 206 flow [2023-11-29 00:16:07,443 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 92 places, 94 transitions, 206 flow [2023-11-29 00:16:07,444 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 00:16:07,444 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;@7e89c25a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 00:16:07,445 INFO L358 AbstractCegarLoop]: Starting to check reachability of 64 error locations. [2023-11-29 00:16:07,445 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 00:16:07,445 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-11-29 00:16:07,445 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 00:16:07,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:16:07,446 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-29 00:16:07,446 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2023-11-29 00:16:07,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:16:07,446 INFO L85 PathProgramCache]: Analyzing trace with hash 451941, now seen corresponding path program 1 times [2023-11-29 00:16:07,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:16:07,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615736857] [2023-11-29 00:16:07,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:16:07,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:16:07,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:16:07,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:16:07,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:16:07,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615736857] [2023-11-29 00:16:07,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615736857] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:16:07,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:16:07,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 00:16:07,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641175344] [2023-11-29 00:16:07,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:16:07,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:16:07,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:16:07,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:16:07,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:16:07,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 94 [2023-11-29 00:16:07,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 94 transitions, 206 flow. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:16:07,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:16:07,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 94 [2023-11-29 00:16:07,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:16:18,162 INFO L124 PetriNetUnfolderBase]: 90835/133665 cut-off events. [2023-11-29 00:16:18,162 INFO L125 PetriNetUnfolderBase]: For 3630/3630 co-relation queries the response was YES. [2023-11-29 00:16:18,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 259300 conditions, 133665 events. 90835/133665 cut-off events. For 3630/3630 co-relation queries the response was YES. Maximal size of possible extension queue 5236. Compared 1050358 event pairs, 68575 based on Foata normal form. 0/65140 useless extension candidates. Maximal degree in co-relation 20189. Up to 100701 conditions per place. [2023-11-29 00:16:18,793 INFO L140 encePairwiseOnDemand]: 75/94 looper letters, 125 selfloop transitions, 8 changer transitions 0/147 dead transitions. [2023-11-29 00:16:18,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 147 transitions, 590 flow [2023-11-29 00:16:18,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:16:18,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 00:16:18,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 199 transitions. [2023-11-29 00:16:18,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7056737588652482 [2023-11-29 00:16:18,796 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 199 transitions. [2023-11-29 00:16:18,796 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 199 transitions. [2023-11-29 00:16:18,796 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:16:18,796 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 199 transitions. [2023-11-29 00:16:18,797 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 66.33333333333333) internal successors, (199), 3 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:16:18,797 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 94.0) internal successors, (376), 4 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:16:18,798 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 94.0) internal successors, (376), 4 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:16:18,798 INFO L175 Difference]: Start difference. First operand has 92 places, 94 transitions, 206 flow. Second operand 3 states and 199 transitions. [2023-11-29 00:16:18,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 147 transitions, 590 flow [2023-11-29 00:16:18,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 147 transitions, 586 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-11-29 00:16:18,803 INFO L231 Difference]: Finished difference. Result has 87 places, 89 transitions, 242 flow [2023-11-29 00:16:18,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=242, PETRI_PLACES=87, PETRI_TRANSITIONS=89} [2023-11-29 00:16:18,804 INFO L281 CegarLoopForPetriNet]: 92 programPoint places, -5 predicate places. [2023-11-29 00:16:18,804 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 89 transitions, 242 flow [2023-11-29 00:16:18,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:16:18,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:16:18,804 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-29 00:16:18,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-29 00:16:18,805 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2023-11-29 00:16:18,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:16:18,805 INFO L85 PathProgramCache]: Analyzing trace with hash 451942, now seen corresponding path program 1 times [2023-11-29 00:16:18,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:16:18,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32979648] [2023-11-29 00:16:18,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:16:18,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:16:18,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:16:18,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:16:18,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:16:18,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32979648] [2023-11-29 00:16:18,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32979648] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:16:18,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:16:18,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 00:16:18,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454779818] [2023-11-29 00:16:18,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:16:18,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:16:18,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:16:18,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:16:18,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:16:18,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 94 [2023-11-29 00:16:18,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 89 transitions, 242 flow. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:16:18,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:16:18,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 94 [2023-11-29 00:16:18,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:16:27,525 INFO L124 PetriNetUnfolderBase]: 67939/99153 cut-off events. [2023-11-29 00:16:27,525 INFO L125 PetriNetUnfolderBase]: For 20863/20863 co-relation queries the response was YES. [2023-11-29 00:16:27,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 212806 conditions, 99153 events. 67939/99153 cut-off events. For 20863/20863 co-relation queries the response was YES. Maximal size of possible extension queue 4059. Compared 739979 event pairs, 58706 based on Foata normal form. 7924/57670 useless extension candidates. Maximal degree in co-relation 201731. Up to 92771 conditions per place. [2023-11-29 00:16:27,965 INFO L140 encePairwiseOnDemand]: 92/94 looper letters, 71 selfloop transitions, 1 changer transitions 0/88 dead transitions. [2023-11-29 00:16:27,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 88 transitions, 384 flow [2023-11-29 00:16:27,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:16:27,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 00:16:27,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 115 transitions. [2023-11-29 00:16:27,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4078014184397163 [2023-11-29 00:16:27,966 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 115 transitions. [2023-11-29 00:16:27,966 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 115 transitions. [2023-11-29 00:16:27,966 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:16:27,966 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 115 transitions. [2023-11-29 00:16:27,967 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:16:27,967 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 94.0) internal successors, (376), 4 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:16:27,967 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 94.0) internal successors, (376), 4 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:16:27,967 INFO L175 Difference]: Start difference. First operand has 87 places, 89 transitions, 242 flow. Second operand 3 states and 115 transitions. [2023-11-29 00:16:27,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 88 transitions, 384 flow [2023-11-29 00:16:28,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 88 transitions, 368 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 00:16:28,132 INFO L231 Difference]: Finished difference. Result has 86 places, 88 transitions, 226 flow [2023-11-29 00:16:28,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=226, PETRI_PLACES=86, PETRI_TRANSITIONS=88} [2023-11-29 00:16:28,133 INFO L281 CegarLoopForPetriNet]: 92 programPoint places, -6 predicate places. [2023-11-29 00:16:28,133 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 88 transitions, 226 flow [2023-11-29 00:16:28,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:16:28,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:16:28,134 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-29 00:16:28,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-29 00:16:28,134 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2023-11-29 00:16:28,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:16:28,135 INFO L85 PathProgramCache]: Analyzing trace with hash 579346331, now seen corresponding path program 1 times [2023-11-29 00:16:28,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:16:28,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511678706] [2023-11-29 00:16:28,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:16:28,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:16:28,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:16:28,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:16:28,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:16:28,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511678706] [2023-11-29 00:16:28,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511678706] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:16:28,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:16:28,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 00:16:28,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965130705] [2023-11-29 00:16:28,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:16:28,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:16:28,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:16:28,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:16:28,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:16:28,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 94 [2023-11-29 00:16:28,224 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 88 transitions, 226 flow. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 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) [2023-11-29 00:16:28,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:16:28,224 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 94 [2023-11-29 00:16:28,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:16:33,919 INFO L124 PetriNetUnfolderBase]: 47304/72762 cut-off events. [2023-11-29 00:16:33,920 INFO L125 PetriNetUnfolderBase]: For 7582/7582 co-relation queries the response was YES. [2023-11-29 00:16:34,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148526 conditions, 72762 events. 47304/72762 cut-off events. For 7582/7582 co-relation queries the response was YES. Maximal size of possible extension queue 3350. Compared 585368 event pairs, 28438 based on Foata normal form. 0/41014 useless extension candidates. Maximal degree in co-relation 148515. Up to 39243 conditions per place. [2023-11-29 00:16:34,238 INFO L140 encePairwiseOnDemand]: 78/94 looper letters, 121 selfloop transitions, 7 changer transitions 0/143 dead transitions. [2023-11-29 00:16:34,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 143 transitions, 614 flow [2023-11-29 00:16:34,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:16:34,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 00:16:34,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 179 transitions. [2023-11-29 00:16:34,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6347517730496454 [2023-11-29 00:16:34,240 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 179 transitions. [2023-11-29 00:16:34,240 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 179 transitions. [2023-11-29 00:16:34,240 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:16:34,240 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 179 transitions. [2023-11-29 00:16:34,240 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 59.666666666666664) internal successors, (179), 3 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:16:34,241 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 94.0) internal successors, (376), 4 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:16:34,241 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 94.0) internal successors, (376), 4 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:16:34,241 INFO L175 Difference]: Start difference. First operand has 86 places, 88 transitions, 226 flow. Second operand 3 states and 179 transitions. [2023-11-29 00:16:34,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 143 transitions, 614 flow [2023-11-29 00:16:34,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 143 transitions, 613 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 00:16:34,260 INFO L231 Difference]: Finished difference. Result has 88 places, 94 transitions, 300 flow [2023-11-29 00:16:34,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=225, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=300, PETRI_PLACES=88, PETRI_TRANSITIONS=94} [2023-11-29 00:16:34,260 INFO L281 CegarLoopForPetriNet]: 92 programPoint places, -4 predicate places. [2023-11-29 00:16:34,260 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 94 transitions, 300 flow [2023-11-29 00:16:34,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 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) [2023-11-29 00:16:34,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:16:34,261 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-29 00:16:34,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-29 00:16:34,261 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2023-11-29 00:16:34,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:16:34,261 INFO L85 PathProgramCache]: Analyzing trace with hash 579346332, now seen corresponding path program 1 times [2023-11-29 00:16:34,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:16:34,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288453866] [2023-11-29 00:16:34,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:16:34,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:16:34,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:16:34,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:16:34,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:16:34,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288453866] [2023-11-29 00:16:34,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288453866] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:16:34,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:16:34,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:16:34,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572248702] [2023-11-29 00:16:34,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:16:34,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 00:16:34,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:16:34,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 00:16:34,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:16:34,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 94 [2023-11-29 00:16:34,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 94 transitions, 300 flow. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:16:34,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:16:34,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 94 [2023-11-29 00:16:34,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:16:38,118 INFO L124 PetriNetUnfolderBase]: 26472/40018 cut-off events. [2023-11-29 00:16:38,119 INFO L125 PetriNetUnfolderBase]: For 10672/10672 co-relation queries the response was YES. [2023-11-29 00:16:38,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92385 conditions, 40018 events. 26472/40018 cut-off events. For 10672/10672 co-relation queries the response was YES. Maximal size of possible extension queue 1955. Compared 287106 event pairs, 21433 based on Foata normal form. 0/25637 useless extension candidates. Maximal degree in co-relation 92372. Up to 36579 conditions per place. [2023-11-29 00:16:38,325 INFO L140 encePairwiseOnDemand]: 84/94 looper letters, 68 selfloop transitions, 1 changer transitions 0/85 dead transitions. [2023-11-29 00:16:38,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 85 transitions, 420 flow [2023-11-29 00:16:38,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:16:38,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 00:16:38,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 117 transitions. [2023-11-29 00:16:38,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4148936170212766 [2023-11-29 00:16:38,326 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 117 transitions. [2023-11-29 00:16:38,326 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 117 transitions. [2023-11-29 00:16:38,326 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:16:38,326 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 117 transitions. [2023-11-29 00:16:38,327 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:16:38,328 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 94.0) internal successors, (376), 4 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:16:38,328 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 94.0) internal successors, (376), 4 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:16:38,328 INFO L175 Difference]: Start difference. First operand has 88 places, 94 transitions, 300 flow. Second operand 3 states and 117 transitions. [2023-11-29 00:16:38,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 85 transitions, 420 flow [2023-11-29 00:16:38,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 85 transitions, 413 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 00:16:38,342 INFO L231 Difference]: Finished difference. Result has 80 places, 85 transitions, 277 flow [2023-11-29 00:16:38,342 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=275, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=277, PETRI_PLACES=80, PETRI_TRANSITIONS=85} [2023-11-29 00:16:38,342 INFO L281 CegarLoopForPetriNet]: 92 programPoint places, -12 predicate places. [2023-11-29 00:16:38,342 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 85 transitions, 277 flow [2023-11-29 00:16:38,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:16:38,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:16:38,343 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:16:38,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-11-29 00:16:38,343 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2023-11-29 00:16:38,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:16:38,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1593907644, now seen corresponding path program 1 times [2023-11-29 00:16:38,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:16:38,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564475170] [2023-11-29 00:16:38,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:16:38,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:16:38,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:16:38,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:16:38,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:16:38,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564475170] [2023-11-29 00:16:38,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564475170] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:16:38,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:16:38,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 00:16:38,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55685493] [2023-11-29 00:16:38,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:16:38,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:16:38,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:16:38,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:16:38,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:16:38,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 94 [2023-11-29 00:16:38,418 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 85 transitions, 277 flow. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:16:38,418 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:16:38,418 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 94 [2023-11-29 00:16:38,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:16:42,566 INFO L124 PetriNetUnfolderBase]: 29885/44744 cut-off events. [2023-11-29 00:16:42,566 INFO L125 PetriNetUnfolderBase]: For 11470/11470 co-relation queries the response was YES. [2023-11-29 00:16:42,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100873 conditions, 44744 events. 29885/44744 cut-off events. For 11470/11470 co-relation queries the response was YES. Maximal size of possible extension queue 2129. Compared 332779 event pairs, 7416 based on Foata normal form. 0/30733 useless extension candidates. Maximal degree in co-relation 100859. Up to 23612 conditions per place. [2023-11-29 00:16:42,780 INFO L140 encePairwiseOnDemand]: 82/94 looper letters, 113 selfloop transitions, 21 changer transitions 0/148 dead transitions. [2023-11-29 00:16:42,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 148 transitions, 751 flow [2023-11-29 00:16:42,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:16:42,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 00:16:42,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 160 transitions. [2023-11-29 00:16:42,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5673758865248227 [2023-11-29 00:16:42,781 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 160 transitions. [2023-11-29 00:16:42,781 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 160 transitions. [2023-11-29 00:16:42,782 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:16:42,782 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 160 transitions. [2023-11-29 00:16:42,782 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:16:42,783 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 94.0) internal successors, (376), 4 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:16:42,783 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 94.0) internal successors, (376), 4 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:16:42,783 INFO L175 Difference]: Start difference. First operand has 80 places, 85 transitions, 277 flow. Second operand 3 states and 160 transitions. [2023-11-29 00:16:42,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 148 transitions, 751 flow [2023-11-29 00:16:42,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 148 transitions, 750 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 00:16:42,803 INFO L231 Difference]: Finished difference. Result has 83 places, 103 transitions, 490 flow [2023-11-29 00:16:42,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=490, PETRI_PLACES=83, PETRI_TRANSITIONS=103} [2023-11-29 00:16:42,804 INFO L281 CegarLoopForPetriNet]: 92 programPoint places, -9 predicate places. [2023-11-29 00:16:42,804 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 103 transitions, 490 flow [2023-11-29 00:16:42,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:16:42,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:16:42,804 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:16:42,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-11-29 00:16:42,805 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2023-11-29 00:16:42,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:16:42,805 INFO L85 PathProgramCache]: Analyzing trace with hash -1593907643, now seen corresponding path program 1 times [2023-11-29 00:16:42,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:16:42,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215370857] [2023-11-29 00:16:42,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:16:42,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:16:42,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:16:42,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:16:42,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:16:42,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215370857] [2023-11-29 00:16:42,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215370857] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:16:42,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:16:42,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 00:16:42,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130208929] [2023-11-29 00:16:42,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:16:42,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:16:42,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:16:42,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:16:42,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:16:42,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 94 [2023-11-29 00:16:42,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 103 transitions, 490 flow. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:16:42,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:16:42,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 94 [2023-11-29 00:16:42,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:16:46,350 INFO L124 PetriNetUnfolderBase]: 24047/36921 cut-off events. [2023-11-29 00:16:46,351 INFO L125 PetriNetUnfolderBase]: For 30570/30574 co-relation queries the response was YES. [2023-11-29 00:16:46,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96118 conditions, 36921 events. 24047/36921 cut-off events. For 30570/30574 co-relation queries the response was YES. Maximal size of possible extension queue 1700. Compared 278045 event pairs, 5680 based on Foata normal form. 1638/28485 useless extension candidates. Maximal degree in co-relation 96103. Up to 24689 conditions per place. [2023-11-29 00:16:46,573 INFO L140 encePairwiseOnDemand]: 88/94 looper letters, 115 selfloop transitions, 11 changer transitions 0/142 dead transitions. [2023-11-29 00:16:46,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 142 transitions, 882 flow [2023-11-29 00:16:46,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:16:46,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 00:16:46,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 144 transitions. [2023-11-29 00:16:46,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5106382978723404 [2023-11-29 00:16:46,575 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 144 transitions. [2023-11-29 00:16:46,575 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 144 transitions. [2023-11-29 00:16:46,575 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:16:46,575 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 144 transitions. [2023-11-29 00:16:46,575 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:16:46,576 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 94.0) internal successors, (376), 4 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:16:46,576 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 94.0) internal successors, (376), 4 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:16:46,576 INFO L175 Difference]: Start difference. First operand has 83 places, 103 transitions, 490 flow. Second operand 3 states and 144 transitions. [2023-11-29 00:16:46,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 142 transitions, 882 flow [2023-11-29 00:16:46,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 142 transitions, 840 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 00:16:46,606 INFO L231 Difference]: Finished difference. Result has 80 places, 100 transitions, 464 flow [2023-11-29 00:16:46,606 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=442, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=464, PETRI_PLACES=80, PETRI_TRANSITIONS=100} [2023-11-29 00:16:46,606 INFO L281 CegarLoopForPetriNet]: 92 programPoint places, -12 predicate places. [2023-11-29 00:16:46,607 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 100 transitions, 464 flow [2023-11-29 00:16:46,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:16:46,607 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:16:46,607 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:16:46,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-11-29 00:16:46,607 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2023-11-29 00:16:46,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:16:46,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1558055034, now seen corresponding path program 1 times [2023-11-29 00:16:46,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:16:46,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676336239] [2023-11-29 00:16:46,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:16:46,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:16:46,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:16:46,648 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:16:46,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:16:46,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676336239] [2023-11-29 00:16:46,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676336239] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:16:46,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:16:46,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:16:46,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996632171] [2023-11-29 00:16:46,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:16:46,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:16:46,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:16:46,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:16:46,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:16:46,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 94 [2023-11-29 00:16:46,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 100 transitions, 464 flow. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:16:46,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:16:46,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 94 [2023-11-29 00:16:46,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:16:53,994 INFO L124 PetriNetUnfolderBase]: 49205/77203 cut-off events. [2023-11-29 00:16:53,995 INFO L125 PetriNetUnfolderBase]: For 60033/60138 co-relation queries the response was YES. [2023-11-29 00:16:54,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 190218 conditions, 77203 events. 49205/77203 cut-off events. For 60033/60138 co-relation queries the response was YES. Maximal size of possible extension queue 3689. Compared 652452 event pairs, 11626 based on Foata normal form. 1275/55643 useless extension candidates. Maximal degree in co-relation 190203. Up to 35008 conditions per place. [2023-11-29 00:16:54,377 INFO L140 encePairwiseOnDemand]: 82/94 looper letters, 216 selfloop transitions, 18 changer transitions 0/250 dead transitions. [2023-11-29 00:16:54,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 250 transitions, 1574 flow [2023-11-29 00:16:54,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 00:16:54,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 00:16:54,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 253 transitions. [2023-11-29 00:16:54,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5382978723404256 [2023-11-29 00:16:54,378 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 253 transitions. [2023-11-29 00:16:54,378 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 253 transitions. [2023-11-29 00:16:54,378 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:16:54,378 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 253 transitions. [2023-11-29 00:16:54,379 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 50.6) internal successors, (253), 5 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:16:54,380 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 94.0) internal successors, (564), 6 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:16:54,380 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 94.0) internal successors, (564), 6 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:16:54,380 INFO L175 Difference]: Start difference. First operand has 80 places, 100 transitions, 464 flow. Second operand 5 states and 253 transitions. [2023-11-29 00:16:54,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 250 transitions, 1574 flow [2023-11-29 00:16:55,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 250 transitions, 1540 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 00:16:55,303 INFO L231 Difference]: Finished difference. Result has 85 places, 117 transitions, 600 flow [2023-11-29 00:16:55,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=442, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=600, PETRI_PLACES=85, PETRI_TRANSITIONS=117} [2023-11-29 00:16:55,304 INFO L281 CegarLoopForPetriNet]: 92 programPoint places, -7 predicate places. [2023-11-29 00:16:55,304 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 117 transitions, 600 flow [2023-11-29 00:16:55,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:16:55,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:16:55,304 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:16:55,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-11-29 00:16:55,304 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thr1Err14ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2023-11-29 00:16:55,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:16:55,305 INFO L85 PathProgramCache]: Analyzing trace with hash 1056394082, now seen corresponding path program 1 times [2023-11-29 00:16:55,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:16:55,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294691904] [2023-11-29 00:16:55,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:16:55,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:16:55,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:16:55,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:16:55,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:16:55,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294691904] [2023-11-29 00:16:55,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294691904] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:16:55,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:16:55,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 00:16:55,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224096235] [2023-11-29 00:16:55,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:16:55,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 00:16:55,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:16:55,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 00:16:55,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-29 00:16:55,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 94 [2023-11-29 00:16:55,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 117 transitions, 600 flow. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:16:55,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:16:55,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 94 [2023-11-29 00:16:55,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:17:09,001 INFO L124 PetriNetUnfolderBase]: 87901/136345 cut-off events. [2023-11-29 00:17:09,001 INFO L125 PetriNetUnfolderBase]: For 89331/89641 co-relation queries the response was YES. [2023-11-29 00:17:09,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 367037 conditions, 136345 events. 87901/136345 cut-off events. For 89331/89641 co-relation queries the response was YES. Maximal size of possible extension queue 5170. Compared 1186618 event pairs, 15281 based on Foata normal form. 30/102689 useless extension candidates. Maximal degree in co-relation 367018. Up to 63288 conditions per place. [2023-11-29 00:17:09,885 INFO L140 encePairwiseOnDemand]: 80/94 looper letters, 308 selfloop transitions, 33 changer transitions 0/355 dead transitions. [2023-11-29 00:17:09,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 355 transitions, 2425 flow [2023-11-29 00:17:09,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 00:17:09,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 00:17:09,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 315 transitions. [2023-11-29 00:17:09,887 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5585106382978723 [2023-11-29 00:17:09,887 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 315 transitions. [2023-11-29 00:17:09,888 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 315 transitions. [2023-11-29 00:17:09,888 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:17:09,888 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 315 transitions. [2023-11-29 00:17:09,889 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 52.5) internal successors, (315), 6 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:17:09,890 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 94.0) internal successors, (658), 7 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:17:09,891 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 94.0) internal successors, (658), 7 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:17:09,891 INFO L175 Difference]: Start difference. First operand has 85 places, 117 transitions, 600 flow. Second operand 6 states and 315 transitions. [2023-11-29 00:17:09,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 355 transitions, 2425 flow [2023-11-29 00:17:09,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 355 transitions, 2425 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-29 00:17:09,970 INFO L231 Difference]: Finished difference. Result has 93 places, 148 transitions, 905 flow [2023-11-29 00:17:09,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=600, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=905, PETRI_PLACES=93, PETRI_TRANSITIONS=148} [2023-11-29 00:17:09,970 INFO L281 CegarLoopForPetriNet]: 92 programPoint places, 1 predicate places. [2023-11-29 00:17:09,970 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 148 transitions, 905 flow [2023-11-29 00:17:09,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:17:09,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:17:09,971 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:17:09,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-11-29 00:17:09,971 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2023-11-29 00:17:09,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:17:09,971 INFO L85 PathProgramCache]: Analyzing trace with hash 2038660056, now seen corresponding path program 1 times [2023-11-29 00:17:09,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:17:09,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221478026] [2023-11-29 00:17:09,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:17:09,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:17:09,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:17:10,013 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:17:10,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:17:10,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221478026] [2023-11-29 00:17:10,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221478026] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:17:10,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:17:10,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 00:17:10,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519713557] [2023-11-29 00:17:10,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:17:10,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:17:10,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:17:10,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:17:10,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:17:10,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 94 [2023-11-29 00:17:10,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 148 transitions, 905 flow. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:17:10,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:17:10,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 94 [2023-11-29 00:17:10,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:17:26,966 INFO L124 PetriNetUnfolderBase]: 102989/160042 cut-off events. [2023-11-29 00:17:26,966 INFO L125 PetriNetUnfolderBase]: For 154162/154986 co-relation queries the response was YES. [2023-11-29 00:17:27,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 475332 conditions, 160042 events. 102989/160042 cut-off events. For 154162/154986 co-relation queries the response was YES. Maximal size of possible extension queue 6077. Compared 1425829 event pairs, 30459 based on Foata normal form. 575/128727 useless extension candidates. Maximal degree in co-relation 475309. Up to 80479 conditions per place. [2023-11-29 00:17:28,292 INFO L140 encePairwiseOnDemand]: 82/94 looper letters, 204 selfloop transitions, 39 changer transitions 0/259 dead transitions. [2023-11-29 00:17:28,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 259 transitions, 2090 flow [2023-11-29 00:17:28,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:17:28,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 00:17:28,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 155 transitions. [2023-11-29 00:17:28,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.549645390070922 [2023-11-29 00:17:28,294 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 155 transitions. [2023-11-29 00:17:28,294 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 155 transitions. [2023-11-29 00:17:28,295 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:17:28,295 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 155 transitions. [2023-11-29 00:17:28,295 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:17:28,296 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 94.0) internal successors, (376), 4 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:17:28,296 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 94.0) internal successors, (376), 4 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:17:28,297 INFO L175 Difference]: Start difference. First operand has 93 places, 148 transitions, 905 flow. Second operand 3 states and 155 transitions. [2023-11-29 00:17:28,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 259 transitions, 2090 flow [2023-11-29 00:17:29,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 259 transitions, 1936 flow, removed 77 selfloop flow, removed 0 redundant places. [2023-11-29 00:17:29,332 INFO L231 Difference]: Finished difference. Result has 97 places, 182 transitions, 1313 flow [2023-11-29 00:17:29,332 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=821, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1313, PETRI_PLACES=97, PETRI_TRANSITIONS=182} [2023-11-29 00:17:29,333 INFO L281 CegarLoopForPetriNet]: 92 programPoint places, 5 predicate places. [2023-11-29 00:17:29,333 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 182 transitions, 1313 flow [2023-11-29 00:17:29,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:17:29,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:17:29,333 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:17:29,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-11-29 00:17:29,333 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2023-11-29 00:17:29,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:17:29,334 INFO L85 PathProgramCache]: Analyzing trace with hash 2038660057, now seen corresponding path program 1 times [2023-11-29 00:17:29,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:17:29,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824488491] [2023-11-29 00:17:29,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:17:29,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:17:29,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:17:29,413 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:17:29,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:17:29,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824488491] [2023-11-29 00:17:29,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824488491] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:17:29,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:17:29,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 00:17:29,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144923614] [2023-11-29 00:17:29,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:17:29,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:17:29,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:17:29,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:17:29,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:17:29,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 94 [2023-11-29 00:17:29,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 182 transitions, 1313 flow. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:17:29,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:17:29,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 94 [2023-11-29 00:17:29,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:17:44,068 INFO L124 PetriNetUnfolderBase]: 85572/135558 cut-off events. [2023-11-29 00:17:44,068 INFO L125 PetriNetUnfolderBase]: For 234441/235087 co-relation queries the response was YES. [2023-11-29 00:17:44,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 427012 conditions, 135558 events. 85572/135558 cut-off events. For 234441/235087 co-relation queries the response was YES. Maximal size of possible extension queue 5370. Compared 1222829 event pairs, 26932 based on Foata normal form. 8714/120504 useless extension candidates. Maximal degree in co-relation 426987. Up to 83336 conditions per place. [2023-11-29 00:17:44,956 INFO L140 encePairwiseOnDemand]: 88/94 looper letters, 206 selfloop transitions, 21 changer transitions 0/245 dead transitions. [2023-11-29 00:17:44,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 245 transitions, 2160 flow [2023-11-29 00:17:44,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:17:44,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 00:17:44,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 139 transitions. [2023-11-29 00:17:44,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4929078014184397 [2023-11-29 00:17:44,957 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 139 transitions. [2023-11-29 00:17:44,957 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 139 transitions. [2023-11-29 00:17:44,958 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:17:44,958 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 139 transitions. [2023-11-29 00:17:44,958 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:17:44,958 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 94.0) internal successors, (376), 4 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:17:44,959 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 94.0) internal successors, (376), 4 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:17:44,959 INFO L175 Difference]: Start difference. First operand has 97 places, 182 transitions, 1313 flow. Second operand 3 states and 139 transitions. [2023-11-29 00:17:44,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 245 transitions, 2160 flow [2023-11-29 00:17:45,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 245 transitions, 2082 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 00:17:45,536 INFO L231 Difference]: Finished difference. Result has 94 places, 173 transitions, 1233 flow [2023-11-29 00:17:45,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=1191, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1233, PETRI_PLACES=94, PETRI_TRANSITIONS=173} [2023-11-29 00:17:45,536 INFO L281 CegarLoopForPetriNet]: 92 programPoint places, 2 predicate places. [2023-11-29 00:17:45,536 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 173 transitions, 1233 flow [2023-11-29 00:17:45,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:17:45,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:17:45,537 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:17:45,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-11-29 00:17:45,537 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2023-11-29 00:17:45,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:17:45,537 INFO L85 PathProgramCache]: Analyzing trace with hash -1226047682, now seen corresponding path program 1 times [2023-11-29 00:17:45,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:17:45,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138943523] [2023-11-29 00:17:45,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:17:45,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:17:45,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:17:45,588 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:17:45,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:17:45,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138943523] [2023-11-29 00:17:45,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138943523] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:17:45,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:17:45,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:17:45,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475376428] [2023-11-29 00:17:45,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:17:45,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:17:45,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:17:45,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:17:45,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:17:45,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 94 [2023-11-29 00:17:45,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 173 transitions, 1233 flow. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:17:45,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:17:45,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 94 [2023-11-29 00:17:45,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:18:12,589 INFO L124 PetriNetUnfolderBase]: 152242/244641 cut-off events. [2023-11-29 00:18:12,589 INFO L125 PetriNetUnfolderBase]: For 383140/384048 co-relation queries the response was YES. [2023-11-29 00:18:13,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 746257 conditions, 244641 events. 152242/244641 cut-off events. For 383140/384048 co-relation queries the response was YES. Maximal size of possible extension queue 9998. Compared 2421324 event pairs, 51255 based on Foata normal form. 3055/200442 useless extension candidates. Maximal degree in co-relation 746232. Up to 120188 conditions per place. [2023-11-29 00:18:14,365 INFO L140 encePairwiseOnDemand]: 83/94 looper letters, 293 selfloop transitions, 27 changer transitions 0/338 dead transitions. [2023-11-29 00:18:14,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 338 transitions, 2942 flow [2023-11-29 00:18:14,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 00:18:14,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 00:18:14,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 235 transitions. [2023-11-29 00:18:14,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2023-11-29 00:18:14,366 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 235 transitions. [2023-11-29 00:18:14,366 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 235 transitions. [2023-11-29 00:18:14,367 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:18:14,367 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 235 transitions. [2023-11-29 00:18:14,367 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 47.0) internal successors, (235), 5 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:18:14,368 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 94.0) internal successors, (564), 6 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:18:14,368 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 94.0) internal successors, (564), 6 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:18:14,368 INFO L175 Difference]: Start difference. First operand has 94 places, 173 transitions, 1233 flow. Second operand 5 states and 235 transitions. [2023-11-29 00:18:14,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 338 transitions, 2942 flow [2023-11-29 00:18:19,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 338 transitions, 2878 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 00:18:19,264 INFO L231 Difference]: Finished difference. Result has 98 places, 184 transitions, 1391 flow [2023-11-29 00:18:19,264 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=1191, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1391, PETRI_PLACES=98, PETRI_TRANSITIONS=184} [2023-11-29 00:18:19,264 INFO L281 CegarLoopForPetriNet]: 92 programPoint places, 6 predicate places. [2023-11-29 00:18:19,264 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 184 transitions, 1391 flow [2023-11-29 00:18:19,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:18:19,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:18:19,265 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:18:19,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-11-29 00:18:19,265 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thr1Err14ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2023-11-29 00:18:19,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:18:19,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1410245301, now seen corresponding path program 1 times [2023-11-29 00:18:19,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:18:19,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490656202] [2023-11-29 00:18:19,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:18:19,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:18:19,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:18:19,467 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:18:19,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:18:19,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490656202] [2023-11-29 00:18:19,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490656202] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:18:19,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:18:19,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 00:18:19,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649868189] [2023-11-29 00:18:19,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:18:19,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 00:18:19,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:18:19,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 00:18:19,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-29 00:18:19,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 94 [2023-11-29 00:18:19,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 184 transitions, 1391 flow. Second operand has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:18:19,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:18:19,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 94 [2023-11-29 00:18:19,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand