./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/valid-memsafety.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/08_rand_cas.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 84cfde4a Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/08_rand_cas.i -s /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux --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 111430583c5cad5728291a83d9964586feec908088fcc502d1f1ab24d409725c --- Real Ultimate output --- This is Ultimate 0.2.5-dev-84cfde4 [2024-10-11 19:27:14,427 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-11 19:27:14,482 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-11 19:27:14,488 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-11 19:27:14,488 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-11 19:27:14,512 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-11 19:27:14,514 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-11 19:27:14,514 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-11 19:27:14,515 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-11 19:27:14,516 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-11 19:27:14,517 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-11 19:27:14,517 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-11 19:27:14,518 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-11 19:27:14,518 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-11 19:27:14,518 INFO L153 SettingsManager]: * Use SBE=true [2024-10-11 19:27:14,518 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-11 19:27:14,519 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-11 19:27:14,519 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-11 19:27:14,519 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-11 19:27:14,519 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-11 19:27:14,519 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-11 19:27:14,522 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-11 19:27:14,523 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-11 19:27:14,523 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-11 19:27:14,523 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-11 19:27:14,523 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-11 19:27:14,523 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-11 19:27:14,524 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-11 19:27:14,524 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-11 19:27:14,524 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-11 19:27:14,524 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-11 19:27:14,524 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-11 19:27:14,525 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-11 19:27:14,525 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 19:27:14,525 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-11 19:27:14,526 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-11 19:27:14,526 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-11 19:27:14,526 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-11 19:27:14,526 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-11 19:27:14,527 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-11 19:27:14,527 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-11 19:27:14,527 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-11 19:27:14,527 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:/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 111430583c5cad5728291a83d9964586feec908088fcc502d1f1ab24d409725c [2024-10-11 19:27:14,737 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-11 19:27:14,764 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-11 19:27:14,767 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-11 19:27:14,768 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-11 19:27:14,769 INFO L274 PluginConnector]: CDTParser initialized [2024-10-11 19:27:14,770 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/08_rand_cas.i [2024-10-11 19:27:16,089 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-11 19:27:16,301 INFO L384 CDTParser]: Found 1 translation units. [2024-10-11 19:27:16,302 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/08_rand_cas.i [2024-10-11 19:27:16,322 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/63a868536/1e202f3e57fe4136acaa7f59d4f39c8c/FLAG85f9a5694 [2024-10-11 19:27:16,674 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/63a868536/1e202f3e57fe4136acaa7f59d4f39c8c [2024-10-11 19:27:16,677 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-11 19:27:16,679 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-11 19:27:16,680 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-11 19:27:16,682 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-11 19:27:16,688 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-11 19:27:16,689 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 07:27:16" (1/1) ... [2024-10-11 19:27:16,691 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a9764e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:27:16, skipping insertion in model container [2024-10-11 19:27:16,691 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 07:27:16" (1/1) ... [2024-10-11 19:27:16,728 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-11 19:27:17,028 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 19:27:17,039 INFO L200 MainTranslator]: Completed pre-run [2024-10-11 19:27:17,074 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 19:27:17,112 INFO L204 MainTranslator]: Completed translation [2024-10-11 19:27:17,113 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:27:17 WrapperNode [2024-10-11 19:27:17,113 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-11 19:27:17,114 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-11 19:27:17,114 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-11 19:27:17,115 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-11 19:27:17,120 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:27:17" (1/1) ... [2024-10-11 19:27:17,154 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:27:17" (1/1) ... [2024-10-11 19:27:17,211 INFO L138 Inliner]: procedures = 178, calls = 38, calls flagged for inlining = 16, calls inlined = 17, statements flattened = 151 [2024-10-11 19:27:17,215 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-11 19:27:17,215 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-11 19:27:17,215 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-11 19:27:17,215 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-11 19:27:17,229 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:27:17" (1/1) ... [2024-10-11 19:27:17,229 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:27:17" (1/1) ... [2024-10-11 19:27:17,233 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:27:17" (1/1) ... [2024-10-11 19:27:17,256 INFO L175 MemorySlicer]: Split 11 memory accesses to 3 slices as follows [2, 6, 3]. 55 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1, 0]. The 4 writes are split as follows [0, 2, 2]. [2024-10-11 19:27:17,256 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:27:17" (1/1) ... [2024-10-11 19:27:17,257 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:27:17" (1/1) ... [2024-10-11 19:27:17,261 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:27:17" (1/1) ... [2024-10-11 19:27:17,264 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:27:17" (1/1) ... [2024-10-11 19:27:17,265 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:27:17" (1/1) ... [2024-10-11 19:27:17,266 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:27:17" (1/1) ... [2024-10-11 19:27:17,269 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-11 19:27:17,270 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-11 19:27:17,270 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-11 19:27:17,270 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-11 19:27:17,271 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:27:17" (1/1) ... [2024-10-11 19:27:17,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 19:27:17,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 19:27:17,300 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-11 19:27:17,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-11 19:27:17,344 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-11 19:27:17,345 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-11 19:27:17,345 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-11 19:27:17,345 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2024-10-11 19:27:17,345 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2024-10-11 19:27:17,345 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-11 19:27:17,345 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-11 19:27:17,346 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-11 19:27:17,346 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-10-11 19:27:17,346 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-11 19:27:17,346 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-11 19:27:17,347 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-11 19:27:17,347 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-11 19:27:17,347 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-11 19:27:17,348 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-11 19:27:17,348 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-10-11 19:27:17,348 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-11 19:27:17,348 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-11 19:27:17,350 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-11 19:27:17,467 INFO L238 CfgBuilder]: Building ICFG [2024-10-11 19:27:17,469 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-11 19:27:17,730 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-11 19:27:17,730 INFO L287 CfgBuilder]: Performing block encoding [2024-10-11 19:27:17,867 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-11 19:27:17,867 INFO L314 CfgBuilder]: Removed 4 assume(true) statements. [2024-10-11 19:27:17,867 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 07:27:17 BoogieIcfgContainer [2024-10-11 19:27:17,867 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-11 19:27:17,870 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-11 19:27:17,871 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-11 19:27:17,874 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-11 19:27:17,874 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 07:27:16" (1/3) ... [2024-10-11 19:27:17,875 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75095be3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 07:27:17, skipping insertion in model container [2024-10-11 19:27:17,875 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:27:17" (2/3) ... [2024-10-11 19:27:17,875 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75095be3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 07:27:17, skipping insertion in model container [2024-10-11 19:27:17,875 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 07:27:17" (3/3) ... [2024-10-11 19:27:17,876 INFO L112 eAbstractionObserver]: Analyzing ICFG 08_rand_cas.i [2024-10-11 19:27:17,891 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-11 19:27:17,891 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2024-10-11 19:27:17,891 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-11 19:27:17,958 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-11 19:27:17,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 67 places, 77 transitions, 158 flow [2024-10-11 19:27:18,008 INFO L124 PetriNetUnfolderBase]: 13/81 cut-off events. [2024-10-11 19:27:18,008 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-11 19:27:18,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85 conditions, 81 events. 13/81 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 205 event pairs, 0 based on Foata normal form. 0/45 useless extension candidates. Maximal degree in co-relation 74. Up to 3 conditions per place. [2024-10-11 19:27:18,011 INFO L82 GeneralOperation]: Start removeDead. Operand has 67 places, 77 transitions, 158 flow [2024-10-11 19:27:18,014 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 67 places, 77 transitions, 158 flow [2024-10-11 19:27:18,021 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 19:27:18,029 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;@d3c0844, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 19:27:18,030 INFO L334 AbstractCegarLoop]: Starting to check reachability of 40 error locations. [2024-10-11 19:27:18,034 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-11 19:27:18,034 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2024-10-11 19:27:18,035 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-11 19:27:18,035 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:27:18,036 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-11 19:27:18,036 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-11 19:27:18,040 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:27:18,041 INFO L85 PathProgramCache]: Analyzing trace with hash 496103, now seen corresponding path program 1 times [2024-10-11 19:27:18,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:27:18,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993144158] [2024-10-11 19:27:18,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:27:18,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:27:18,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:27:18,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:27:18,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:27:18,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993144158] [2024-10-11 19:27:18,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993144158] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:27:18,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:27:18,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 19:27:18,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293294202] [2024-10-11 19:27:18,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:27:18,193 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-11 19:27:18,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:27:18,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-11 19:27:18,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-11 19:27:18,227 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 77 [2024-10-11 19:27:18,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 77 transitions, 158 flow. Second operand has 2 states, 2 states have (on average 28.0) internal successors, (56), 2 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:27:18,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:27:18,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 77 [2024-10-11 19:27:18,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:27:18,349 INFO L124 PetriNetUnfolderBase]: 70/224 cut-off events. [2024-10-11 19:27:18,350 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-11 19:27:18,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 384 conditions, 224 events. 70/224 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 849 event pairs, 58 based on Foata normal form. 24/197 useless extension candidates. Maximal degree in co-relation 367. Up to 156 conditions per place. [2024-10-11 19:27:18,355 INFO L140 encePairwiseOnDemand]: 65/77 looper letters, 34 selfloop transitions, 0 changer transitions 0/60 dead transitions. [2024-10-11 19:27:18,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 60 transitions, 192 flow [2024-10-11 19:27:18,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-11 19:27:18,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-10-11 19:27:18,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 100 transitions. [2024-10-11 19:27:18,366 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6493506493506493 [2024-10-11 19:27:18,369 INFO L175 Difference]: Start difference. First operand has 67 places, 77 transitions, 158 flow. Second operand 2 states and 100 transitions. [2024-10-11 19:27:18,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 60 transitions, 192 flow [2024-10-11 19:27:18,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 60 transitions, 192 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-11 19:27:18,374 INFO L231 Difference]: Finished difference. Result has 60 places, 60 transitions, 124 flow [2024-10-11 19:27:18,376 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=124, PETRI_PLACES=60, PETRI_TRANSITIONS=60} [2024-10-11 19:27:18,380 INFO L277 CegarLoopForPetriNet]: 67 programPoint places, -7 predicate places. [2024-10-11 19:27:18,381 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 60 transitions, 124 flow [2024-10-11 19:27:18,381 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 28.0) internal successors, (56), 2 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:27:18,382 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:27:18,382 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-10-11 19:27:18,382 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-11 19:27:18,382 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-11 19:27:18,383 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:27:18,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1896579585, now seen corresponding path program 1 times [2024-10-11 19:27:18,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:27:18,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857450542] [2024-10-11 19:27:18,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:27:18,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:27:18,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-11 19:27:18,416 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-11 19:27:18,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-11 19:27:18,457 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-11 19:27:18,457 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-11 19:27:18,459 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (39 of 40 remaining) [2024-10-11 19:27:18,460 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 40 remaining) [2024-10-11 19:27:18,461 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 40 remaining) [2024-10-11 19:27:18,461 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 40 remaining) [2024-10-11 19:27:18,461 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 40 remaining) [2024-10-11 19:27:18,461 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 40 remaining) [2024-10-11 19:27:18,462 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 40 remaining) [2024-10-11 19:27:18,462 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONMEMORY_LEAK (32 of 40 remaining) [2024-10-11 19:27:18,463 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18ASSERT_VIOLATIONMEMORY_LEAK (31 of 40 remaining) [2024-10-11 19:27:18,463 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 40 remaining) [2024-10-11 19:27:18,463 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 40 remaining) [2024-10-11 19:27:18,463 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 40 remaining) [2024-10-11 19:27:18,463 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 40 remaining) [2024-10-11 19:27:18,463 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 40 remaining) [2024-10-11 19:27:18,463 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 40 remaining) [2024-10-11 19:27:18,464 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 40 remaining) [2024-10-11 19:27:18,464 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 40 remaining) [2024-10-11 19:27:18,464 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 40 remaining) [2024-10-11 19:27:18,464 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 40 remaining) [2024-10-11 19:27:18,465 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONMEMORY_LEAK (20 of 40 remaining) [2024-10-11 19:27:18,465 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (19 of 40 remaining) [2024-10-11 19:27:18,465 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 40 remaining) [2024-10-11 19:27:18,466 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 40 remaining) [2024-10-11 19:27:18,466 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 40 remaining) [2024-10-11 19:27:18,467 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 40 remaining) [2024-10-11 19:27:18,467 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 40 remaining) [2024-10-11 19:27:18,467 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 40 remaining) [2024-10-11 19:27:18,467 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONMEMORY_LEAK (12 of 40 remaining) [2024-10-11 19:27:18,468 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18ASSERT_VIOLATIONMEMORY_LEAK (11 of 40 remaining) [2024-10-11 19:27:18,468 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 40 remaining) [2024-10-11 19:27:18,468 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 40 remaining) [2024-10-11 19:27:18,469 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 40 remaining) [2024-10-11 19:27:18,469 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 40 remaining) [2024-10-11 19:27:18,469 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 40 remaining) [2024-10-11 19:27:18,469 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 40 remaining) [2024-10-11 19:27:18,469 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 40 remaining) [2024-10-11 19:27:18,469 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 40 remaining) [2024-10-11 19:27:18,470 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 40 remaining) [2024-10-11 19:27:18,471 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 40 remaining) [2024-10-11 19:27:18,471 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONMEMORY_LEAK (0 of 40 remaining) [2024-10-11 19:27:18,471 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-11 19:27:18,471 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1] [2024-10-11 19:27:18,474 WARN L239 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-11 19:27:18,479 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-10-11 19:27:18,564 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-11 19:27:18,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 126 places, 147 transitions, 304 flow [2024-10-11 19:27:18,597 INFO L124 PetriNetUnfolderBase]: 26/156 cut-off events. [2024-10-11 19:27:18,597 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-11 19:27:18,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 164 conditions, 156 events. 26/156 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 616 event pairs, 0 based on Foata normal form. 0/86 useless extension candidates. Maximal degree in co-relation 143. Up to 3 conditions per place. [2024-10-11 19:27:18,603 INFO L82 GeneralOperation]: Start removeDead. Operand has 126 places, 147 transitions, 304 flow [2024-10-11 19:27:18,607 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 126 places, 147 transitions, 304 flow [2024-10-11 19:27:18,608 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 19:27:18,610 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;@d3c0844, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 19:27:18,610 INFO L334 AbstractCegarLoop]: Starting to check reachability of 59 error locations. [2024-10-11 19:27:18,612 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-11 19:27:18,612 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2024-10-11 19:27:18,612 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-11 19:27:18,612 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:27:18,613 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-11 19:27:18,613 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-10-11 19:27:18,613 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:27:18,613 INFO L85 PathProgramCache]: Analyzing trace with hash 642074, now seen corresponding path program 1 times [2024-10-11 19:27:18,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:27:18,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673714517] [2024-10-11 19:27:18,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:27:18,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:27:18,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:27:18,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:27:18,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:27:18,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673714517] [2024-10-11 19:27:18,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673714517] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:27:18,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:27:18,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 19:27:18,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826216668] [2024-10-11 19:27:18,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:27:18,636 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-11 19:27:18,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:27:18,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-11 19:27:18,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-11 19:27:18,637 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 147 [2024-10-11 19:27:18,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 147 transitions, 304 flow. Second operand has 2 states, 2 states have (on average 53.0) internal successors, (106), 2 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:27:18,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:27:18,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 147 [2024-10-11 19:27:18,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:27:19,567 INFO L124 PetriNetUnfolderBase]: 4969/10043 cut-off events. [2024-10-11 19:27:19,567 INFO L125 PetriNetUnfolderBase]: For 114/114 co-relation queries the response was YES. [2024-10-11 19:27:19,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17698 conditions, 10043 events. 4969/10043 cut-off events. For 114/114 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 85367 event pairs, 4408 based on Foata normal form. 1464/8829 useless extension candidates. Maximal degree in co-relation 10993. Up to 7560 conditions per place. [2024-10-11 19:27:19,642 INFO L140 encePairwiseOnDemand]: 124/147 looper letters, 65 selfloop transitions, 0 changer transitions 0/116 dead transitions. [2024-10-11 19:27:19,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 116 transitions, 372 flow [2024-10-11 19:27:19,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-11 19:27:19,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-10-11 19:27:19,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 192 transitions. [2024-10-11 19:27:19,648 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6530612244897959 [2024-10-11 19:27:19,648 INFO L175 Difference]: Start difference. First operand has 126 places, 147 transitions, 304 flow. Second operand 2 states and 192 transitions. [2024-10-11 19:27:19,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 116 transitions, 372 flow [2024-10-11 19:27:19,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 116 transitions, 372 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-11 19:27:19,652 INFO L231 Difference]: Finished difference. Result has 114 places, 116 transitions, 242 flow [2024-10-11 19:27:19,653 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=242, PETRI_PLACES=114, PETRI_TRANSITIONS=116} [2024-10-11 19:27:19,653 INFO L277 CegarLoopForPetriNet]: 126 programPoint places, -12 predicate places. [2024-10-11 19:27:19,653 INFO L471 AbstractCegarLoop]: Abstraction has has 114 places, 116 transitions, 242 flow [2024-10-11 19:27:19,654 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 53.0) internal successors, (106), 2 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:27:19,654 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:27:19,654 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:27:19,654 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-11 19:27:19,654 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-10-11 19:27:19,655 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:27:19,655 INFO L85 PathProgramCache]: Analyzing trace with hash -526338289, now seen corresponding path program 1 times [2024-10-11 19:27:19,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:27:19,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108025522] [2024-10-11 19:27:19,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:27:19,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:27:19,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:27:19,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:27:19,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:27:19,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108025522] [2024-10-11 19:27:19,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108025522] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:27:19,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:27:19,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-11 19:27:19,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918148970] [2024-10-11 19:27:19,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:27:19,779 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 19:27:19,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:27:19,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 19:27:19,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 19:27:19,801 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 147 [2024-10-11 19:27:19,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 116 transitions, 242 flow. Second operand has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:27:19,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:27:19,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 147 [2024-10-11 19:27:19,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:27:20,688 INFO L124 PetriNetUnfolderBase]: 4269/8806 cut-off events. [2024-10-11 19:27:20,688 INFO L125 PetriNetUnfolderBase]: For 108/108 co-relation queries the response was YES. [2024-10-11 19:27:20,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15484 conditions, 8806 events. 4269/8806 cut-off events. For 108/108 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 73594 event pairs, 3102 based on Foata normal form. 0/6750 useless extension candidates. Maximal degree in co-relation 15479. Up to 5153 conditions per place. [2024-10-11 19:27:20,737 INFO L140 encePairwiseOnDemand]: 136/147 looper letters, 119 selfloop transitions, 3 changer transitions 0/171 dead transitions. [2024-10-11 19:27:20,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 171 transitions, 601 flow [2024-10-11 19:27:20,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 19:27:20,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 19:27:20,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 280 transitions. [2024-10-11 19:27:20,739 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6349206349206349 [2024-10-11 19:27:20,739 INFO L175 Difference]: Start difference. First operand has 114 places, 116 transitions, 242 flow. Second operand 3 states and 280 transitions. [2024-10-11 19:27:20,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 171 transitions, 601 flow [2024-10-11 19:27:20,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 171 transitions, 601 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-11 19:27:20,743 INFO L231 Difference]: Finished difference. Result has 117 places, 118 transitions, 275 flow [2024-10-11 19:27:20,744 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=275, PETRI_PLACES=117, PETRI_TRANSITIONS=118} [2024-10-11 19:27:20,744 INFO L277 CegarLoopForPetriNet]: 126 programPoint places, -9 predicate places. [2024-10-11 19:27:20,745 INFO L471 AbstractCegarLoop]: Abstraction has has 117 places, 118 transitions, 275 flow [2024-10-11 19:27:20,745 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:27:20,745 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:27:20,745 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:27:20,745 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-11 19:27:20,745 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-10-11 19:27:20,746 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:27:20,746 INFO L85 PathProgramCache]: Analyzing trace with hash -526338288, now seen corresponding path program 1 times [2024-10-11 19:27:20,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:27:20,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288881676] [2024-10-11 19:27:20,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:27:20,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:27:20,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:27:20,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:27:20,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:27:20,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288881676] [2024-10-11 19:27:20,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288881676] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:27:20,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:27:20,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-11 19:27:20,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448758079] [2024-10-11 19:27:20,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:27:20,834 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 19:27:20,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:27:20,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 19:27:20,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 19:27:20,848 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 147 [2024-10-11 19:27:20,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 118 transitions, 275 flow. Second operand has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:27:20,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:27:20,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 147 [2024-10-11 19:27:20,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:27:21,493 INFO L124 PetriNetUnfolderBase]: 3420/7215 cut-off events. [2024-10-11 19:27:21,493 INFO L125 PetriNetUnfolderBase]: For 183/183 co-relation queries the response was YES. [2024-10-11 19:27:21,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12903 conditions, 7215 events. 3420/7215 cut-off events. For 183/183 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 58536 event pairs, 3084 based on Foata normal form. 0/5900 useless extension candidates. Maximal degree in co-relation 12896. Up to 5255 conditions per place. [2024-10-11 19:27:21,530 INFO L140 encePairwiseOnDemand]: 138/147 looper letters, 60 selfloop transitions, 1 changer transitions 0/110 dead transitions. [2024-10-11 19:27:21,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 110 transitions, 381 flow [2024-10-11 19:27:21,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 19:27:21,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 19:27:21,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 217 transitions. [2024-10-11 19:27:21,532 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49206349206349204 [2024-10-11 19:27:21,532 INFO L175 Difference]: Start difference. First operand has 117 places, 118 transitions, 275 flow. Second operand 3 states and 217 transitions. [2024-10-11 19:27:21,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 110 transitions, 381 flow [2024-10-11 19:27:21,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 110 transitions, 378 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-11 19:27:21,539 INFO L231 Difference]: Finished difference. Result has 110 places, 110 transitions, 258 flow [2024-10-11 19:27:21,539 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=258, PETRI_PLACES=110, PETRI_TRANSITIONS=110} [2024-10-11 19:27:21,540 INFO L277 CegarLoopForPetriNet]: 126 programPoint places, -16 predicate places. [2024-10-11 19:27:21,540 INFO L471 AbstractCegarLoop]: Abstraction has has 110 places, 110 transitions, 258 flow [2024-10-11 19:27:21,540 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:27:21,541 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:27:21,541 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1] [2024-10-11 19:27:21,541 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-11 19:27:21,541 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-10-11 19:27:21,541 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:27:21,542 INFO L85 PathProgramCache]: Analyzing trace with hash -1721433550, now seen corresponding path program 1 times [2024-10-11 19:27:21,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:27:21,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727119051] [2024-10-11 19:27:21,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:27:21,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:27:21,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-11 19:27:21,550 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-11 19:27:21,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-11 19:27:21,558 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-11 19:27:21,558 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-11 19:27:21,558 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (58 of 59 remaining) [2024-10-11 19:27:21,558 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (57 of 59 remaining) [2024-10-11 19:27:21,559 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (56 of 59 remaining) [2024-10-11 19:27:21,559 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (55 of 59 remaining) [2024-10-11 19:27:21,559 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (54 of 59 remaining) [2024-10-11 19:27:21,559 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (53 of 59 remaining) [2024-10-11 19:27:21,559 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (52 of 59 remaining) [2024-10-11 19:27:21,559 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONMEMORY_LEAK (51 of 59 remaining) [2024-10-11 19:27:21,559 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18ASSERT_VIOLATIONMEMORY_LEAK (50 of 59 remaining) [2024-10-11 19:27:21,559 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (49 of 59 remaining) [2024-10-11 19:27:21,559 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 59 remaining) [2024-10-11 19:27:21,560 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 59 remaining) [2024-10-11 19:27:21,560 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 59 remaining) [2024-10-11 19:27:21,560 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 59 remaining) [2024-10-11 19:27:21,560 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 59 remaining) [2024-10-11 19:27:21,560 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 59 remaining) [2024-10-11 19:27:21,560 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 59 remaining) [2024-10-11 19:27:21,560 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 59 remaining) [2024-10-11 19:27:21,560 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 59 remaining) [2024-10-11 19:27:21,560 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONMEMORY_LEAK (39 of 59 remaining) [2024-10-11 19:27:21,561 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (38 of 59 remaining) [2024-10-11 19:27:21,561 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 59 remaining) [2024-10-11 19:27:21,561 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 59 remaining) [2024-10-11 19:27:21,561 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 59 remaining) [2024-10-11 19:27:21,561 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 59 remaining) [2024-10-11 19:27:21,561 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 59 remaining) [2024-10-11 19:27:21,561 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 59 remaining) [2024-10-11 19:27:21,561 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONMEMORY_LEAK (31 of 59 remaining) [2024-10-11 19:27:21,562 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18ASSERT_VIOLATIONMEMORY_LEAK (30 of 59 remaining) [2024-10-11 19:27:21,562 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 59 remaining) [2024-10-11 19:27:21,562 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 59 remaining) [2024-10-11 19:27:21,562 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 59 remaining) [2024-10-11 19:27:21,562 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 59 remaining) [2024-10-11 19:27:21,562 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 59 remaining) [2024-10-11 19:27:21,562 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 59 remaining) [2024-10-11 19:27:21,562 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 59 remaining) [2024-10-11 19:27:21,563 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 59 remaining) [2024-10-11 19:27:21,563 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 59 remaining) [2024-10-11 19:27:21,563 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 59 remaining) [2024-10-11 19:27:21,563 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONMEMORY_LEAK (19 of 59 remaining) [2024-10-11 19:27:21,563 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 59 remaining) [2024-10-11 19:27:21,563 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 59 remaining) [2024-10-11 19:27:21,563 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 59 remaining) [2024-10-11 19:27:21,563 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 59 remaining) [2024-10-11 19:27:21,563 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 59 remaining) [2024-10-11 19:27:21,564 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 59 remaining) [2024-10-11 19:27:21,564 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONMEMORY_LEAK (12 of 59 remaining) [2024-10-11 19:27:21,564 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18ASSERT_VIOLATIONMEMORY_LEAK (11 of 59 remaining) [2024-10-11 19:27:21,564 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 59 remaining) [2024-10-11 19:27:21,565 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 59 remaining) [2024-10-11 19:27:21,566 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 59 remaining) [2024-10-11 19:27:21,566 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 59 remaining) [2024-10-11 19:27:21,566 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 59 remaining) [2024-10-11 19:27:21,566 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 59 remaining) [2024-10-11 19:27:21,566 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 59 remaining) [2024-10-11 19:27:21,566 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 59 remaining) [2024-10-11 19:27:21,566 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 59 remaining) [2024-10-11 19:27:21,567 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 59 remaining) [2024-10-11 19:27:21,567 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONMEMORY_LEAK (0 of 59 remaining) [2024-10-11 19:27:21,567 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-11 19:27:21,567 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2024-10-11 19:27:21,568 WARN L239 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-11 19:27:21,568 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-10-11 19:27:21,639 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-11 19:27:21,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 185 places, 217 transitions, 452 flow [2024-10-11 19:27:21,670 INFO L124 PetriNetUnfolderBase]: 39/231 cut-off events. [2024-10-11 19:27:21,671 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-10-11 19:27:21,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 244 conditions, 231 events. 39/231 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1073 event pairs, 0 based on Foata normal form. 0/127 useless extension candidates. Maximal degree in co-relation 212. Up to 4 conditions per place. [2024-10-11 19:27:21,674 INFO L82 GeneralOperation]: Start removeDead. Operand has 185 places, 217 transitions, 452 flow [2024-10-11 19:27:21,677 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 185 places, 217 transitions, 452 flow [2024-10-11 19:27:21,679 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 19:27:21,679 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;@d3c0844, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 19:27:21,679 INFO L334 AbstractCegarLoop]: Starting to check reachability of 78 error locations. [2024-10-11 19:27:21,680 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-11 19:27:21,681 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2024-10-11 19:27:21,681 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-11 19:27:21,681 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:27:21,681 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-11 19:27:21,681 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 75 more)] === [2024-10-11 19:27:21,682 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:27:21,682 INFO L85 PathProgramCache]: Analyzing trace with hash 857555, now seen corresponding path program 1 times [2024-10-11 19:27:21,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:27:21,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661885010] [2024-10-11 19:27:21,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:27:21,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:27:21,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:27:21,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:27:21,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:27:21,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661885010] [2024-10-11 19:27:21,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661885010] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:27:21,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:27:21,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 19:27:21,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882271652] [2024-10-11 19:27:21,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:27:21,692 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-11 19:27:21,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:27:21,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-11 19:27:21,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-11 19:27:21,693 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 217 [2024-10-11 19:27:21,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 217 transitions, 452 flow. Second operand has 2 states, 2 states have (on average 78.0) internal successors, (156), 2 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:27:21,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:27:21,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 217 [2024-10-11 19:27:21,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand