./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 4fc63b2a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37b21f6f-efd1-4b33-8a81-373d02760ee1/bin/uautomizer-verify-4GaUIPS5ZU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37b21f6f-efd1-4b33-8a81-373d02760ee1/bin/uautomizer-verify-4GaUIPS5ZU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37b21f6f-efd1-4b33-8a81-373d02760ee1/bin/uautomizer-verify-4GaUIPS5ZU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37b21f6f-efd1-4b33-8a81-373d02760ee1/bin/uautomizer-verify-4GaUIPS5ZU/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-ext/02_inc_cas.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37b21f6f-efd1-4b33-8a81-373d02760ee1/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37b21f6f-efd1-4b33-8a81-373d02760ee1/bin/uautomizer-verify-4GaUIPS5ZU --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 0.2.5-dev-4fc63b2 [2024-10-31 22:01:00,259 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-31 22:01:00,363 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37b21f6f-efd1-4b33-8a81-373d02760ee1/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-31 22:01:00,369 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-31 22:01:00,370 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-31 22:01:00,404 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-31 22:01:00,405 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-31 22:01:00,405 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-31 22:01:00,406 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-31 22:01:00,406 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-31 22:01:00,407 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-31 22:01:00,410 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-31 22:01:00,411 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-31 22:01:00,411 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-31 22:01:00,411 INFO L153 SettingsManager]: * Use SBE=true [2024-10-31 22:01:00,412 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-31 22:01:00,412 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-31 22:01:00,416 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-31 22:01:00,416 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-31 22:01:00,417 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-31 22:01:00,417 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-31 22:01:00,421 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-31 22:01:00,421 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-31 22:01:00,422 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-31 22:01:00,422 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-31 22:01:00,422 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-31 22:01:00,423 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-31 22:01:00,423 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-31 22:01:00,423 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-31 22:01:00,424 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-31 22:01:00,425 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-31 22:01:00,426 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-31 22:01:00,427 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-31 22:01:00,427 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:01:00,428 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-31 22:01:00,444 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-31 22:01:00,444 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-31 22:01:00,444 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-31 22:01:00,445 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-31 22:01:00,445 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-31 22:01:00,445 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-31 22:01:00,448 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-31 22:01:00,449 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_37b21f6f-efd1-4b33-8a81-373d02760ee1/bin/uautomizer-verify-4GaUIPS5ZU/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37b21f6f-efd1-4b33-8a81-373d02760ee1/bin/uautomizer-verify-4GaUIPS5ZU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ede09850ec25b369afc0cd16258beff942f9fc7c5304532be31fd5925a934e14 [2024-10-31 22:01:00,802 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-31 22:01:00,832 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-31 22:01:00,835 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-31 22:01:00,836 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-31 22:01:00,837 INFO L274 PluginConnector]: CDTParser initialized [2024-10-31 22:01:00,838 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37b21f6f-efd1-4b33-8a81-373d02760ee1/bin/uautomizer-verify-4GaUIPS5ZU/../../sv-benchmarks/c/pthread-ext/02_inc_cas.i Unable to find full path for "g++" [2024-10-31 22:01:02,914 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-31 22:01:03,250 INFO L384 CDTParser]: Found 1 translation units. [2024-10-31 22:01:03,254 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37b21f6f-efd1-4b33-8a81-373d02760ee1/sv-benchmarks/c/pthread-ext/02_inc_cas.i [2024-10-31 22:01:03,277 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37b21f6f-efd1-4b33-8a81-373d02760ee1/bin/uautomizer-verify-4GaUIPS5ZU/data/158c9c375/ba907f6734064641856982e4908a6a8c/FLAG8bdb20493 [2024-10-31 22:01:03,491 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37b21f6f-efd1-4b33-8a81-373d02760ee1/bin/uautomizer-verify-4GaUIPS5ZU/data/158c9c375/ba907f6734064641856982e4908a6a8c [2024-10-31 22:01:03,493 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-31 22:01:03,495 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-31 22:01:03,498 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-31 22:01:03,498 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-31 22:01:03,503 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-31 22:01:03,503 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:01:03" (1/1) ... [2024-10-31 22:01:03,505 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7538b68d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:01:03, skipping insertion in model container [2024-10-31 22:01:03,505 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:01:03" (1/1) ... [2024-10-31 22:01:03,570 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-31 22:01:03,967 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:01:03,978 INFO L200 MainTranslator]: Completed pre-run [2024-10-31 22:01:04,041 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:01:04,090 INFO L204 MainTranslator]: Completed translation [2024-10-31 22:01:04,090 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:01:04 WrapperNode [2024-10-31 22:01:04,091 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-31 22:01:04,092 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-31 22:01:04,092 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-31 22:01:04,093 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-31 22:01:04,101 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:01:04" (1/1) ... [2024-10-31 22:01:04,120 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:01:04" (1/1) ... [2024-10-31 22:01:04,151 INFO L138 Inliner]: procedures = 170, calls = 26, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 74 [2024-10-31 22:01:04,152 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-31 22:01:04,152 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-31 22:01:04,152 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-31 22:01:04,153 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-31 22:01:04,168 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:01:04" (1/1) ... [2024-10-31 22:01:04,168 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:01:04" (1/1) ... [2024-10-31 22:01:04,170 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:01:04" (1/1) ... [2024-10-31 22:01:04,191 INFO L175 MemorySlicer]: Split 10 memory accesses to 3 slices as follows [2, 5, 3]. 50 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1, 0]. The 3 writes are split as follows [0, 1, 2]. [2024-10-31 22:01:04,192 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:01:04" (1/1) ... [2024-10-31 22:01:04,192 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:01:04" (1/1) ... [2024-10-31 22:01:04,201 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:01:04" (1/1) ... [2024-10-31 22:01:04,205 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:01:04" (1/1) ... [2024-10-31 22:01:04,207 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:01:04" (1/1) ... [2024-10-31 22:01:04,208 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:01:04" (1/1) ... [2024-10-31 22:01:04,212 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-31 22:01:04,213 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-31 22:01:04,218 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-31 22:01:04,218 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-31 22:01:04,219 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:01:04" (1/1) ... [2024-10-31 22:01:04,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:01:04,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37b21f6f-efd1-4b33-8a81-373d02760ee1/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:01:04,262 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37b21f6f-efd1-4b33-8a81-373d02760ee1/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-31 22:01:04,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37b21f6f-efd1-4b33-8a81-373d02760ee1/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-31 22:01:04,329 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-31 22:01:04,330 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-31 22:01:04,330 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-31 22:01:04,330 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2024-10-31 22:01:04,333 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2024-10-31 22:01:04,333 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-31 22:01:04,333 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-31 22:01:04,334 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-31 22:01:04,334 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-10-31 22:01:04,334 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-31 22:01:04,334 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-31 22:01:04,334 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-31 22:01:04,334 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-31 22:01:04,335 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-31 22:01:04,335 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-31 22:01:04,335 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-10-31 22:01:04,335 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-31 22:01:04,340 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-31 22:01:04,342 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-31 22:01:04,557 INFO L238 CfgBuilder]: Building ICFG [2024-10-31 22:01:04,559 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-31 22:01:04,815 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-31 22:01:04,816 INFO L287 CfgBuilder]: Performing block encoding [2024-10-31 22:01:05,095 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-31 22:01:05,096 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-31 22:01:05,096 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:01:05 BoogieIcfgContainer [2024-10-31 22:01:05,096 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-31 22:01:05,100 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-31 22:01:05,100 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-31 22:01:05,104 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-31 22:01:05,104 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.10 10:01:03" (1/3) ... [2024-10-31 22:01:05,105 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ed51e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:01:05, skipping insertion in model container [2024-10-31 22:01:05,105 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:01:04" (2/3) ... [2024-10-31 22:01:05,106 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ed51e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:01:05, skipping insertion in model container [2024-10-31 22:01:05,106 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:01:05" (3/3) ... [2024-10-31 22:01:05,108 INFO L112 eAbstractionObserver]: Analyzing ICFG 02_inc_cas.i [2024-10-31 22:01:05,128 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-31 22:01:05,128 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2024-10-31 22:01:05,129 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-31 22:01:05,210 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-31 22:01:05,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 35 places, 35 transitions, 74 flow [2024-10-31 22:01:05,278 INFO L124 PetriNetUnfolderBase]: 3/39 cut-off events. [2024-10-31 22:01:05,278 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-31 22:01:05,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43 conditions, 39 events. 3/39 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 134 event pairs, 0 based on Foata normal form. 0/17 useless extension candidates. Maximal degree in co-relation 32. Up to 2 conditions per place. [2024-10-31 22:01:05,282 INFO L82 GeneralOperation]: Start removeDead. Operand has 35 places, 35 transitions, 74 flow [2024-10-31 22:01:05,286 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 35 places, 35 transitions, 74 flow [2024-10-31 22:01:05,302 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 22:01:05,314 INFO L333 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, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=None, 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;@1ebbb5ba, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 22:01:05,314 INFO L334 AbstractCegarLoop]: Starting to check reachability of 32 error locations. [2024-10-31 22:01:05,318 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-31 22:01:05,318 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2024-10-31 22:01:05,318 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-31 22:01:05,319 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:01:05,319 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-31 22:01:05,320 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2024-10-31 22:01:05,326 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:01:05,326 INFO L85 PathProgramCache]: Analyzing trace with hash 282694, now seen corresponding path program 1 times [2024-10-31 22:01:05,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:01:05,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690258973] [2024-10-31 22:01:05,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:01:05,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:01:05,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:01:05,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:01:05,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:01:05,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690258973] [2024-10-31 22:01:05,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690258973] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:01:05,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:01:05,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:01:05,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084639425] [2024-10-31 22:01:05,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:01:05,509 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-31 22:01:05,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:01:05,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-31 22:01:05,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-31 22:01:05,549 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 35 [2024-10-31 22:01:05,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 35 transitions, 74 flow. Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:01:05,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:01:05,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 35 [2024-10-31 22:01:05,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:01:05,655 INFO L124 PetriNetUnfolderBase]: 42/114 cut-off events. [2024-10-31 22:01:05,655 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-31 22:01:05,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 220 conditions, 114 events. 42/114 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 404 event pairs, 36 based on Foata normal form. 0/69 useless extension candidates. Maximal degree in co-relation 208. Up to 102 conditions per place. [2024-10-31 22:01:05,658 INFO L140 encePairwiseOnDemand]: 31/35 looper letters, 24 selfloop transitions, 0 changer transitions 0/29 dead transitions. [2024-10-31 22:01:05,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 29 transitions, 110 flow [2024-10-31 22:01:05,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-31 22:01:05,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-10-31 22:01:05,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 40 transitions. [2024-10-31 22:01:05,672 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-10-31 22:01:05,674 INFO L175 Difference]: Start difference. First operand has 35 places, 35 transitions, 74 flow. Second operand 2 states and 40 transitions. [2024-10-31 22:01:05,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 29 transitions, 110 flow [2024-10-31 22:01:05,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 29 transitions, 110 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-31 22:01:05,681 INFO L231 Difference]: Finished difference. Result has 31 places, 29 transitions, 62 flow [2024-10-31 22:01:05,683 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=62, PETRI_PLACES=31, PETRI_TRANSITIONS=29} [2024-10-31 22:01:05,687 INFO L277 CegarLoopForPetriNet]: 35 programPoint places, -4 predicate places. [2024-10-31 22:01:05,687 INFO L471 AbstractCegarLoop]: Abstraction has has 31 places, 29 transitions, 62 flow [2024-10-31 22:01:05,688 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:01:05,689 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:01:05,690 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-10-31 22:01:05,690 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-31 22:01:05,690 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2024-10-31 22:01:05,691 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:01:05,692 INFO L85 PathProgramCache]: Analyzing trace with hash 271677128, now seen corresponding path program 1 times [2024-10-31 22:01:05,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:01:05,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699008157] [2024-10-31 22:01:05,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:01:05,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:01:05,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:01:05,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:01:05,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:01:05,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699008157] [2024-10-31 22:01:06,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699008157] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:01:06,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:01:06,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:01:06,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965944515] [2024-10-31 22:01:06,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:01:06,003 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:01:06,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:01:06,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:01:06,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:01:06,046 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 35 [2024-10-31 22:01:06,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 29 transitions, 62 flow. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:01:06,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:01:06,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 35 [2024-10-31 22:01:06,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:01:06,176 INFO L124 PetriNetUnfolderBase]: 36/99 cut-off events. [2024-10-31 22:01:06,179 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-31 22:01:06,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 191 conditions, 99 events. 36/99 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 343 event pairs, 28 based on Foata normal form. 0/63 useless extension candidates. Maximal degree in co-relation 187. Up to 78 conditions per place. [2024-10-31 22:01:06,181 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 20 selfloop transitions, 3 changer transitions 0/28 dead transitions. [2024-10-31 22:01:06,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 28 transitions, 106 flow [2024-10-31 22:01:06,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:01:06,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 22:01:06,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 44 transitions. [2024-10-31 22:01:06,186 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.41904761904761906 [2024-10-31 22:01:06,186 INFO L175 Difference]: Start difference. First operand has 31 places, 29 transitions, 62 flow. Second operand 3 states and 44 transitions. [2024-10-31 22:01:06,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 28 transitions, 106 flow [2024-10-31 22:01:06,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 28 transitions, 106 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-31 22:01:06,190 INFO L231 Difference]: Finished difference. Result has 30 places, 26 transitions, 62 flow [2024-10-31 22:01:06,190 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=62, PETRI_PLACES=30, PETRI_TRANSITIONS=26} [2024-10-31 22:01:06,191 INFO L277 CegarLoopForPetriNet]: 35 programPoint places, -5 predicate places. [2024-10-31 22:01:06,192 INFO L471 AbstractCegarLoop]: Abstraction has has 30 places, 26 transitions, 62 flow [2024-10-31 22:01:06,192 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:01:06,192 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:01:06,193 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-10-31 22:01:06,193 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-31 22:01:06,193 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2024-10-31 22:01:06,194 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:01:06,194 INFO L85 PathProgramCache]: Analyzing trace with hash 271677129, now seen corresponding path program 1 times [2024-10-31 22:01:06,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:01:06,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182272551] [2024-10-31 22:01:06,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:01:06,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:01:06,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:01:06,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:01:06,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:01:06,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182272551] [2024-10-31 22:01:06,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182272551] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:01:06,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:01:06,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:01:06,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980089897] [2024-10-31 22:01:06,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:01:06,427 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:01:06,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:01:06,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:01:06,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:01:06,451 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 35 [2024-10-31 22:01:06,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 26 transitions, 62 flow. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:01:06,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:01:06,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 35 [2024-10-31 22:01:06,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:01:06,556 INFO L124 PetriNetUnfolderBase]: 30/84 cut-off events. [2024-10-31 22:01:06,556 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-31 22:01:06,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169 conditions, 84 events. 30/84 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 271 event pairs, 22 based on Foata normal form. 0/60 useless extension candidates. Maximal degree in co-relation 164. Up to 63 conditions per place. [2024-10-31 22:01:06,558 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 17 selfloop transitions, 3 changer transitions 0/25 dead transitions. [2024-10-31 22:01:06,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 25 transitions, 100 flow [2024-10-31 22:01:06,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:01:06,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-31 22:01:06,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 47 transitions. [2024-10-31 22:01:06,561 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3357142857142857 [2024-10-31 22:01:06,561 INFO L175 Difference]: Start difference. First operand has 30 places, 26 transitions, 62 flow. Second operand 4 states and 47 transitions. [2024-10-31 22:01:06,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 25 transitions, 100 flow [2024-10-31 22:01:06,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 25 transitions, 94 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-31 22:01:06,563 INFO L231 Difference]: Finished difference. Result has 28 places, 23 transitions, 56 flow [2024-10-31 22:01:06,563 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=56, PETRI_PLACES=28, PETRI_TRANSITIONS=23} [2024-10-31 22:01:06,564 INFO L277 CegarLoopForPetriNet]: 35 programPoint places, -7 predicate places. [2024-10-31 22:01:06,564 INFO L471 AbstractCegarLoop]: Abstraction has has 28 places, 23 transitions, 56 flow [2024-10-31 22:01:06,565 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:01:06,565 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:01:06,565 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-10-31 22:01:06,565 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-31 22:01:06,565 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2024-10-31 22:01:06,566 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:01:06,566 INFO L85 PathProgramCache]: Analyzing trace with hash -167972605, now seen corresponding path program 1 times [2024-10-31 22:01:06,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:01:06,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647836525] [2024-10-31 22:01:06,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:01:06,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:01:06,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-31 22:01:06,588 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-31 22:01:06,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-31 22:01:06,622 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-31 22:01:06,622 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-31 22:01:06,624 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (31 of 32 remaining) [2024-10-31 22:01:06,627 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 32 remaining) [2024-10-31 22:01:06,629 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 32 remaining) [2024-10-31 22:01:06,630 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 32 remaining) [2024-10-31 22:01:06,631 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 32 remaining) [2024-10-31 22:01:06,631 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14ASSERT_VIOLATIONMEMORY_LEAK (26 of 32 remaining) [2024-10-31 22:01:06,633 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 32 remaining) [2024-10-31 22:01:06,633 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 32 remaining) [2024-10-31 22:01:06,633 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 32 remaining) [2024-10-31 22:01:06,634 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 32 remaining) [2024-10-31 22:01:06,635 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 32 remaining) [2024-10-31 22:01:06,636 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 32 remaining) [2024-10-31 22:01:06,636 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 32 remaining) [2024-10-31 22:01:06,636 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 32 remaining) [2024-10-31 22:01:06,637 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 32 remaining) [2024-10-31 22:01:06,637 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 32 remaining) [2024-10-31 22:01:06,637 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (15 of 32 remaining) [2024-10-31 22:01:06,638 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 32 remaining) [2024-10-31 22:01:06,638 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 32 remaining) [2024-10-31 22:01:06,639 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 32 remaining) [2024-10-31 22:01:06,640 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 32 remaining) [2024-10-31 22:01:06,640 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14ASSERT_VIOLATIONMEMORY_LEAK (10 of 32 remaining) [2024-10-31 22:01:06,640 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 32 remaining) [2024-10-31 22:01:06,640 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 32 remaining) [2024-10-31 22:01:06,641 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 32 remaining) [2024-10-31 22:01:06,641 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 32 remaining) [2024-10-31 22:01:06,641 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 32 remaining) [2024-10-31 22:01:06,642 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 32 remaining) [2024-10-31 22:01:06,642 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 32 remaining) [2024-10-31 22:01:06,642 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 32 remaining) [2024-10-31 22:01:06,642 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 32 remaining) [2024-10-31 22:01:06,642 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 32 remaining) [2024-10-31 22:01:06,643 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-31 22:01:06,643 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2024-10-31 22:01:06,648 WARN L244 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-31 22:01:06,652 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-10-31 22:01:06,736 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-31 22:01:06,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 62 places, 63 transitions, 136 flow [2024-10-31 22:01:06,761 INFO L124 PetriNetUnfolderBase]: 6/72 cut-off events. [2024-10-31 22:01:06,762 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-31 22:01:06,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80 conditions, 72 events. 6/72 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 316 event pairs, 0 based on Foata normal form. 0/30 useless extension candidates. Maximal degree in co-relation 59. Up to 3 conditions per place. [2024-10-31 22:01:06,764 INFO L82 GeneralOperation]: Start removeDead. Operand has 62 places, 63 transitions, 136 flow [2024-10-31 22:01:06,765 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 62 places, 63 transitions, 136 flow [2024-10-31 22:01:06,766 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 22:01:06,770 INFO L333 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, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=None, 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;@1ebbb5ba, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 22:01:06,771 INFO L334 AbstractCegarLoop]: Starting to check reachability of 47 error locations. [2024-10-31 22:01:06,772 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-31 22:01:06,773 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2024-10-31 22:01:06,773 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-31 22:01:06,773 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:01:06,773 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-31 22:01:06,773 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-10-31 22:01:06,773 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:01:06,774 INFO L85 PathProgramCache]: Analyzing trace with hash 345253, now seen corresponding path program 1 times [2024-10-31 22:01:06,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:01:06,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083032042] [2024-10-31 22:01:06,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:01:06,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:01:06,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:01:06,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:01:06,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:01:06,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083032042] [2024-10-31 22:01:06,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083032042] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:01:06,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:01:06,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:01:06,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289365981] [2024-10-31 22:01:06,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:01:06,800 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-31 22:01:06,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:01:06,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-31 22:01:06,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-31 22:01:06,801 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 63 [2024-10-31 22:01:06,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 63 transitions, 136 flow. Second operand has 2 states, 2 states have (on average 11.0) internal successors, (22), 2 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:01:06,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:01:06,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 63 [2024-10-31 22:01:06,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:01:07,410 INFO L124 PetriNetUnfolderBase]: 1980/3340 cut-off events. [2024-10-31 22:01:07,411 INFO L125 PetriNetUnfolderBase]: For 60/60 co-relation queries the response was YES. [2024-10-31 22:01:07,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6525 conditions, 3340 events. 1980/3340 cut-off events. For 60/60 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 19414 event pairs, 1746 based on Foata normal form. 0/1690 useless extension candidates. Maximal degree in co-relation 4917. Up to 3123 conditions per place. [2024-10-31 22:01:07,440 INFO L140 encePairwiseOnDemand]: 56/63 looper letters, 45 selfloop transitions, 0 changer transitions 0/54 dead transitions. [2024-10-31 22:01:07,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 54 transitions, 208 flow [2024-10-31 22:01:07,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-31 22:01:07,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-10-31 22:01:07,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 72 transitions. [2024-10-31 22:01:07,442 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-10-31 22:01:07,442 INFO L175 Difference]: Start difference. First operand has 62 places, 63 transitions, 136 flow. Second operand 2 states and 72 transitions. [2024-10-31 22:01:07,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 54 transitions, 208 flow [2024-10-31 22:01:07,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 54 transitions, 208 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-31 22:01:07,444 INFO L231 Difference]: Finished difference. Result has 56 places, 54 transitions, 118 flow [2024-10-31 22:01:07,444 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=118, PETRI_PLACES=56, PETRI_TRANSITIONS=54} [2024-10-31 22:01:07,445 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, -6 predicate places. [2024-10-31 22:01:07,446 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 54 transitions, 118 flow [2024-10-31 22:01:07,446 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 11.0) internal successors, (22), 2 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:01:07,446 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:01:07,446 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-10-31 22:01:07,446 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-31 22:01:07,447 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-10-31 22:01:07,447 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:01:07,447 INFO L85 PathProgramCache]: Analyzing trace with hash 331825155, now seen corresponding path program 1 times [2024-10-31 22:01:07,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:01:07,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627259832] [2024-10-31 22:01:07,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:01:07,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:01:07,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:01:07,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:01:07,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:01:07,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627259832] [2024-10-31 22:01:07,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627259832] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:01:07,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:01:07,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:01:07,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742977023] [2024-10-31 22:01:07,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:01:07,588 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:01:07,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:01:07,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:01:07,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:01:07,628 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 63 [2024-10-31 22:01:07,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 54 transitions, 118 flow. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:01:07,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:01:07,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 63 [2024-10-31 22:01:07,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:01:08,065 INFO L124 PetriNetUnfolderBase]: 978/1742 cut-off events. [2024-10-31 22:01:08,066 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2024-10-31 22:01:08,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3332 conditions, 1742 events. 978/1742 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 9580 event pairs, 682 based on Foata normal form. 0/1070 useless extension candidates. Maximal degree in co-relation 3327. Up to 1227 conditions per place. [2024-10-31 22:01:08,079 INFO L140 encePairwiseOnDemand]: 46/63 looper letters, 65 selfloop transitions, 5 changer transitions 0/79 dead transitions. [2024-10-31 22:01:08,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 79 transitions, 313 flow [2024-10-31 22:01:08,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:01:08,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-31 22:01:08,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 128 transitions. [2024-10-31 22:01:08,084 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5079365079365079 [2024-10-31 22:01:08,084 INFO L175 Difference]: Start difference. First operand has 56 places, 54 transitions, 118 flow. Second operand 4 states and 128 transitions. [2024-10-31 22:01:08,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 79 transitions, 313 flow [2024-10-31 22:01:08,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 79 transitions, 313 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-31 22:01:08,088 INFO L231 Difference]: Finished difference. Result has 54 places, 52 transitions, 149 flow [2024-10-31 22:01:08,088 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=149, PETRI_PLACES=54, PETRI_TRANSITIONS=52} [2024-10-31 22:01:08,089 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, -8 predicate places. [2024-10-31 22:01:08,089 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 52 transitions, 149 flow [2024-10-31 22:01:08,089 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:01:08,090 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:01:08,092 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:01:08,092 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-31 22:01:08,092 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-10-31 22:01:08,092 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:01:08,093 INFO L85 PathProgramCache]: Analyzing trace with hash 1056406379, now seen corresponding path program 1 times [2024-10-31 22:01:08,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:01:08,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138554192] [2024-10-31 22:01:08,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:01:08,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:01:08,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:01:08,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:01:08,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:01:08,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138554192] [2024-10-31 22:01:08,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138554192] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:01:08,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:01:08,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:01:08,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017466493] [2024-10-31 22:01:08,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:01:08,208 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:01:08,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:01:08,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:01:08,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:01:08,222 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 63 [2024-10-31 22:01:08,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 52 transitions, 149 flow. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:01:08,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:01:08,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 63 [2024-10-31 22:01:08,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:01:08,598 INFO L124 PetriNetUnfolderBase]: 945/1618 cut-off events. [2024-10-31 22:01:08,598 INFO L125 PetriNetUnfolderBase]: For 96/96 co-relation queries the response was YES. [2024-10-31 22:01:08,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3514 conditions, 1618 events. 945/1618 cut-off events. For 96/96 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 8629 event pairs, 124 based on Foata normal form. 0/1201 useless extension candidates. Maximal degree in co-relation 3507. Up to 1133 conditions per place. [2024-10-31 22:01:08,610 INFO L140 encePairwiseOnDemand]: 53/63 looper letters, 68 selfloop transitions, 9 changer transitions 0/84 dead transitions. [2024-10-31 22:01:08,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 84 transitions, 388 flow [2024-10-31 22:01:08,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:01:08,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 22:01:08,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 100 transitions. [2024-10-31 22:01:08,612 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5291005291005291 [2024-10-31 22:01:08,612 INFO L175 Difference]: Start difference. First operand has 54 places, 52 transitions, 149 flow. Second operand 3 states and 100 transitions. [2024-10-31 22:01:08,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 84 transitions, 388 flow [2024-10-31 22:01:08,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 84 transitions, 387 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-31 22:01:08,616 INFO L231 Difference]: Finished difference. Result has 57 places, 58 transitions, 224 flow [2024-10-31 22:01:08,616 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=224, PETRI_PLACES=57, PETRI_TRANSITIONS=58} [2024-10-31 22:01:08,617 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, -5 predicate places. [2024-10-31 22:01:08,617 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 58 transitions, 224 flow [2024-10-31 22:01:08,618 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:01:08,618 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:01:08,618 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:01:08,618 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-10-31 22:01:08,619 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-10-31 22:01:08,619 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:01:08,619 INFO L85 PathProgramCache]: Analyzing trace with hash 1056406380, now seen corresponding path program 1 times [2024-10-31 22:01:08,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:01:08,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518647141] [2024-10-31 22:01:08,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:01:08,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:01:08,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:01:08,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:01:08,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:01:08,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518647141] [2024-10-31 22:01:08,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518647141] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:01:08,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:01:08,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:01:08,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714910627] [2024-10-31 22:01:08,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:01:08,730 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:01:08,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:01:08,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:01:08,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:01:08,748 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 63 [2024-10-31 22:01:08,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 58 transitions, 224 flow. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:01:08,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:01:08,749 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 63 [2024-10-31 22:01:08,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:01:09,027 INFO L124 PetriNetUnfolderBase]: 732/1259 cut-off events. [2024-10-31 22:01:09,027 INFO L125 PetriNetUnfolderBase]: For 644/644 co-relation queries the response was YES. [2024-10-31 22:01:09,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3237 conditions, 1259 events. 732/1259 cut-off events. For 644/644 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 6290 event pairs, 107 based on Foata normal form. 90/1082 useless extension candidates. Maximal degree in co-relation 3229. Up to 916 conditions per place. [2024-10-31 22:01:09,042 INFO L140 encePairwiseOnDemand]: 57/63 looper letters, 54 selfloop transitions, 7 changer transitions 0/70 dead transitions. [2024-10-31 22:01:09,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 70 transitions, 375 flow [2024-10-31 22:01:09,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:01:09,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 22:01:09,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 84 transitions. [2024-10-31 22:01:09,043 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-10-31 22:01:09,043 INFO L175 Difference]: Start difference. First operand has 57 places, 58 transitions, 224 flow. Second operand 3 states and 84 transitions. [2024-10-31 22:01:09,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 70 transitions, 375 flow [2024-10-31 22:01:09,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 70 transitions, 357 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-31 22:01:09,054 INFO L231 Difference]: Finished difference. Result has 54 places, 55 transitions, 214 flow [2024-10-31 22:01:09,054 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=214, PETRI_PLACES=54, PETRI_TRANSITIONS=55} [2024-10-31 22:01:09,055 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, -8 predicate places. [2024-10-31 22:01:09,055 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 55 transitions, 214 flow [2024-10-31 22:01:09,055 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:01:09,055 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:01:09,055 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1] [2024-10-31 22:01:09,056 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-10-31 22:01:09,056 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-10-31 22:01:09,056 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:01:09,056 INFO L85 PathProgramCache]: Analyzing trace with hash -76789090, now seen corresponding path program 1 times [2024-10-31 22:01:09,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:01:09,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511231439] [2024-10-31 22:01:09,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:01:09,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:01:09,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-31 22:01:09,068 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-31 22:01:09,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-31 22:01:09,083 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-31 22:01:09,084 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-31 22:01:09,085 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (46 of 47 remaining) [2024-10-31 22:01:09,085 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 47 remaining) [2024-10-31 22:01:09,085 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 47 remaining) [2024-10-31 22:01:09,086 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 47 remaining) [2024-10-31 22:01:09,086 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 47 remaining) [2024-10-31 22:01:09,087 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14ASSERT_VIOLATIONMEMORY_LEAK (41 of 47 remaining) [2024-10-31 22:01:09,087 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 47 remaining) [2024-10-31 22:01:09,087 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 47 remaining) [2024-10-31 22:01:09,087 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 47 remaining) [2024-10-31 22:01:09,087 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 47 remaining) [2024-10-31 22:01:09,088 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 47 remaining) [2024-10-31 22:01:09,088 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 47 remaining) [2024-10-31 22:01:09,088 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 47 remaining) [2024-10-31 22:01:09,088 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 47 remaining) [2024-10-31 22:01:09,088 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 47 remaining) [2024-10-31 22:01:09,088 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 47 remaining) [2024-10-31 22:01:09,089 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (30 of 47 remaining) [2024-10-31 22:01:09,090 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 47 remaining) [2024-10-31 22:01:09,090 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 47 remaining) [2024-10-31 22:01:09,090 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 47 remaining) [2024-10-31 22:01:09,091 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 47 remaining) [2024-10-31 22:01:09,091 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14ASSERT_VIOLATIONMEMORY_LEAK (25 of 47 remaining) [2024-10-31 22:01:09,091 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 47 remaining) [2024-10-31 22:01:09,091 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 47 remaining) [2024-10-31 22:01:09,091 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 47 remaining) [2024-10-31 22:01:09,092 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 47 remaining) [2024-10-31 22:01:09,092 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 47 remaining) [2024-10-31 22:01:09,092 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 47 remaining) [2024-10-31 22:01:09,092 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 47 remaining) [2024-10-31 22:01:09,092 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 47 remaining) [2024-10-31 22:01:09,092 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 47 remaining) [2024-10-31 22:01:09,093 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 47 remaining) [2024-10-31 22:01:09,093 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 47 remaining) [2024-10-31 22:01:09,093 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 47 remaining) [2024-10-31 22:01:09,093 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 47 remaining) [2024-10-31 22:01:09,095 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 47 remaining) [2024-10-31 22:01:09,095 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14ASSERT_VIOLATIONMEMORY_LEAK (10 of 47 remaining) [2024-10-31 22:01:09,096 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 47 remaining) [2024-10-31 22:01:09,096 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 47 remaining) [2024-10-31 22:01:09,096 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 47 remaining) [2024-10-31 22:01:09,096 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 47 remaining) [2024-10-31 22:01:09,096 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 47 remaining) [2024-10-31 22:01:09,096 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 47 remaining) [2024-10-31 22:01:09,097 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 47 remaining) [2024-10-31 22:01:09,097 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 47 remaining) [2024-10-31 22:01:09,097 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 47 remaining) [2024-10-31 22:01:09,097 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 47 remaining) [2024-10-31 22:01:09,097 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-10-31 22:01:09,097 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2024-10-31 22:01:09,098 WARN L244 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-31 22:01:09,098 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-10-31 22:01:09,181 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-31 22:01:09,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 89 places, 91 transitions, 200 flow [2024-10-31 22:01:09,196 INFO L124 PetriNetUnfolderBase]: 9/105 cut-off events. [2024-10-31 22:01:09,196 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-10-31 22:01:09,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118 conditions, 105 events. 9/105 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 484 event pairs, 0 based on Foata normal form. 0/43 useless extension candidates. Maximal degree in co-relation 86. Up to 4 conditions per place. [2024-10-31 22:01:09,198 INFO L82 GeneralOperation]: Start removeDead. Operand has 89 places, 91 transitions, 200 flow [2024-10-31 22:01:09,199 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 89 places, 91 transitions, 200 flow [2024-10-31 22:01:09,200 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 22:01:09,201 INFO L333 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, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=None, 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;@1ebbb5ba, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 22:01:09,201 INFO L334 AbstractCegarLoop]: Starting to check reachability of 62 error locations. [2024-10-31 22:01:09,202 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-31 22:01:09,202 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2024-10-31 22:01:09,202 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-31 22:01:09,202 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:01:09,202 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-31 22:01:09,203 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2024-10-31 22:01:09,203 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:01:09,203 INFO L85 PathProgramCache]: Analyzing trace with hash 435616, now seen corresponding path program 1 times [2024-10-31 22:01:09,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:01:09,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548117518] [2024-10-31 22:01:09,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:01:09,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:01:09,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:01:09,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:01:09,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:01:09,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548117518] [2024-10-31 22:01:09,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548117518] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:01:09,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:01:09,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:01:09,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735113732] [2024-10-31 22:01:09,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:01:09,213 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-31 22:01:09,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:01:09,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-31 22:01:09,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-31 22:01:09,214 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 91 [2024-10-31 22:01:09,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 91 transitions, 200 flow. Second operand has 2 states, 2 states have (on average 15.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:01:09,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:01:09,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 91 [2024-10-31 22:01:09,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:01:18,580 INFO L124 PetriNetUnfolderBase]: 60462/86204 cut-off events. [2024-10-31 22:01:18,580 INFO L125 PetriNetUnfolderBase]: For 2429/2429 co-relation queries the response was YES. [2024-10-31 22:01:18,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169893 conditions, 86204 events. 60462/86204 cut-off events. For 2429/2429 co-relation queries the response was YES. Maximal size of possible extension queue 3228. Compared 598676 event pairs, 53730 based on Foata normal form. 0/40040 useless extension candidates. Maximal degree in co-relation 33051. Up to 82182 conditions per place. [2024-10-31 22:01:19,110 INFO L140 encePairwiseOnDemand]: 81/91 looper letters, 66 selfloop transitions, 0 changer transitions 0/79 dead transitions. [2024-10-31 22:01:19,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 79 transitions, 308 flow [2024-10-31 22:01:19,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-31 22:01:19,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-10-31 22:01:19,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 104 transitions. [2024-10-31 22:01:19,112 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-10-31 22:01:19,112 INFO L175 Difference]: Start difference. First operand has 89 places, 91 transitions, 200 flow. Second operand 2 states and 104 transitions. [2024-10-31 22:01:19,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 79 transitions, 308 flow [2024-10-31 22:01:19,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 79 transitions, 306 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-10-31 22:01:19,119 INFO L231 Difference]: Finished difference. Result has 81 places, 79 transitions, 174 flow [2024-10-31 22:01:19,120 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=174, PETRI_PLACES=81, PETRI_TRANSITIONS=79} [2024-10-31 22:01:19,121 INFO L277 CegarLoopForPetriNet]: 89 programPoint places, -8 predicate places. [2024-10-31 22:01:19,122 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 79 transitions, 174 flow [2024-10-31 22:01:19,124 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 15.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:01:19,124 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:01:19,124 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-10-31 22:01:19,124 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-10-31 22:01:19,125 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2024-10-31 22:01:19,125 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:01:19,125 INFO L85 PathProgramCache]: Analyzing trace with hash 418692856, now seen corresponding path program 1 times [2024-10-31 22:01:19,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:01:19,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648610401] [2024-10-31 22:01:19,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:01:19,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:01:19,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:01:19,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:01:19,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:01:19,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648610401] [2024-10-31 22:01:19,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648610401] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:01:19,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:01:19,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:01:19,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723148627] [2024-10-31 22:01:19,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:01:19,202 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:01:19,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:01:19,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:01:19,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:01:19,225 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 91 [2024-10-31 22:01:19,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 79 transitions, 174 flow. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:01:19,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:01:19,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 91 [2024-10-31 22:01:19,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:01:25,709 INFO L124 PetriNetUnfolderBase]: 43095/65066 cut-off events. [2024-10-31 22:01:25,709 INFO L125 PetriNetUnfolderBase]: For 1050/1050 co-relation queries the response was YES. [2024-10-31 22:01:25,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126111 conditions, 65066 events. 43095/65066 cut-off events. For 1050/1050 co-relation queries the response was YES. Maximal size of possible extension queue 3047. Compared 496612 event pairs, 26389 based on Foata normal form. 0/34094 useless extension candidates. Maximal degree in co-relation 126105. Up to 39243 conditions per place. [2024-10-31 22:01:26,021 INFO L140 encePairwiseOnDemand]: 51/91 looper letters, 138 selfloop transitions, 37 changer transitions 0/188 dead transitions. [2024-10-31 22:01:26,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 188 transitions, 757 flow [2024-10-31 22:01:26,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:01:26,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-31 22:01:26,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 249 transitions. [2024-10-31 22:01:26,023 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6840659340659341 [2024-10-31 22:01:26,023 INFO L175 Difference]: Start difference. First operand has 81 places, 79 transitions, 174 flow. Second operand 4 states and 249 transitions. [2024-10-31 22:01:26,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 188 transitions, 757 flow [2024-10-31 22:01:26,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 188 transitions, 757 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-31 22:01:26,032 INFO L231 Difference]: Finished difference. Result has 87 places, 115 transitions, 490 flow [2024-10-31 22:01:26,036 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=490, PETRI_PLACES=87, PETRI_TRANSITIONS=115} [2024-10-31 22:01:26,037 INFO L277 CegarLoopForPetriNet]: 89 programPoint places, -2 predicate places. [2024-10-31 22:01:26,037 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 115 transitions, 490 flow [2024-10-31 22:01:26,037 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:01:26,037 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:01:26,037 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-10-31 22:01:26,037 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-10-31 22:01:26,038 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2024-10-31 22:01:26,038 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:01:26,038 INFO L85 PathProgramCache]: Analyzing trace with hash 418692857, now seen corresponding path program 1 times [2024-10-31 22:01:26,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:01:26,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965688260] [2024-10-31 22:01:26,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:01:26,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:01:26,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:01:26,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:01:26,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:01:26,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965688260] [2024-10-31 22:01:26,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965688260] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:01:26,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:01:26,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:01:26,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739749871] [2024-10-31 22:01:26,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:01:26,152 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:01:26,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:01:26,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:01:26,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:01:26,191 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 91 [2024-10-31 22:01:26,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 115 transitions, 490 flow. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:01:26,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:01:26,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 91 [2024-10-31 22:01:26,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:01:31,183 INFO L124 PetriNetUnfolderBase]: 24834/38246 cut-off events. [2024-10-31 22:01:31,184 INFO L125 PetriNetUnfolderBase]: For 5227/5227 co-relation queries the response was YES. [2024-10-31 22:01:31,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100394 conditions, 38246 events. 24834/38246 cut-off events. For 5227/5227 co-relation queries the response was YES. Maximal size of possible extension queue 1960. Compared 283202 event pairs, 13465 based on Foata normal form. 5823/31013 useless extension candidates. Maximal degree in co-relation 100385. Up to 20379 conditions per place. [2024-10-31 22:01:31,581 INFO L140 encePairwiseOnDemand]: 75/91 looper letters, 126 selfloop transitions, 7 changer transitions 0/146 dead transitions. [2024-10-31 22:01:31,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 146 transitions, 876 flow [2024-10-31 22:01:31,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:01:31,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-31 22:01:31,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 177 transitions. [2024-10-31 22:01:31,583 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.48626373626373626 [2024-10-31 22:01:31,583 INFO L175 Difference]: Start difference. First operand has 87 places, 115 transitions, 490 flow. Second operand 4 states and 177 transitions. [2024-10-31 22:01:31,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 146 transitions, 876 flow [2024-10-31 22:01:31,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 146 transitions, 876 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-31 22:01:31,644 INFO L231 Difference]: Finished difference. Result has 81 places, 106 transitions, 486 flow [2024-10-31 22:01:31,645 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=472, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=486, PETRI_PLACES=81, PETRI_TRANSITIONS=106} [2024-10-31 22:01:31,646 INFO L277 CegarLoopForPetriNet]: 89 programPoint places, -8 predicate places. [2024-10-31 22:01:31,646 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 106 transitions, 486 flow [2024-10-31 22:01:31,646 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:01:31,647 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:01:31,647 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:01:31,647 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-10-31 22:01:31,647 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2024-10-31 22:01:31,648 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:01:31,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1363075007, now seen corresponding path program 1 times [2024-10-31 22:01:31,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:01:31,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154236088] [2024-10-31 22:01:31,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:01:31,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:01:31,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:01:31,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:01:31,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:01:31,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154236088] [2024-10-31 22:01:31,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154236088] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:01:31,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:01:31,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:01:31,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597058787] [2024-10-31 22:01:31,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:01:31,776 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:01:31,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:01:31,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:01:31,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:01:31,796 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 91 [2024-10-31 22:01:31,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 106 transitions, 486 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) [2024-10-31 22:01:31,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:01:31,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 91 [2024-10-31 22:01:31,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand