./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/valid-memsafety.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_71-funloop_racing.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a046e57d Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_71-funloop_racing.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/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 bde6fe221f69c3fccb0f7c90e011f0b13ab5ca582ddcd328a459cbb512a8fd7f --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-mul-div-a046e57-m [2024-10-13 12:32:20,095 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-13 12:32:20,178 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-13 12:32:20,185 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-13 12:32:20,186 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-13 12:32:20,218 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-13 12:32:20,219 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-13 12:32:20,219 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-13 12:32:20,220 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-13 12:32:20,220 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-13 12:32:20,221 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-13 12:32:20,221 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-13 12:32:20,222 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-13 12:32:20,222 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-13 12:32:20,222 INFO L153 SettingsManager]: * Use SBE=true [2024-10-13 12:32:20,223 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-13 12:32:20,223 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-13 12:32:20,223 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-13 12:32:20,224 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-13 12:32:20,224 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-13 12:32:20,224 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-13 12:32:20,229 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-13 12:32:20,229 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-13 12:32:20,229 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-13 12:32:20,232 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-13 12:32:20,232 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-13 12:32:20,233 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-13 12:32:20,233 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-13 12:32:20,233 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-13 12:32:20,234 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-13 12:32:20,234 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-13 12:32:20,234 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-13 12:32:20,234 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-13 12:32:20,235 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 12:32:20,235 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-13 12:32:20,235 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-13 12:32:20,235 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-13 12:32:20,235 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-13 12:32:20,236 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-13 12:32:20,236 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-13 12:32:20,237 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-13 12:32:20,238 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-13 12:32:20,238 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/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bde6fe221f69c3fccb0f7c90e011f0b13ab5ca582ddcd328a459cbb512a8fd7f [2024-10-13 12:32:20,543 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-13 12:32:20,569 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-13 12:32:20,572 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-13 12:32:20,573 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-13 12:32:20,574 INFO L274 PluginConnector]: CDTParser initialized [2024-10-13 12:32:20,575 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_71-funloop_racing.i [2024-10-13 12:32:22,157 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-13 12:32:22,426 INFO L384 CDTParser]: Found 1 translation units. [2024-10-13 12:32:22,426 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_71-funloop_racing.i [2024-10-13 12:32:22,445 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/883588a47/18475d71512748239ec47cc85b40811c/FLAG19a375040 [2024-10-13 12:32:22,463 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/883588a47/18475d71512748239ec47cc85b40811c [2024-10-13 12:32:22,466 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-13 12:32:22,468 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-13 12:32:22,469 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-13 12:32:22,470 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-13 12:32:22,475 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-13 12:32:22,476 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:32:22" (1/1) ... [2024-10-13 12:32:22,477 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e6cc026 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:32:22, skipping insertion in model container [2024-10-13 12:32:22,477 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:32:22" (1/1) ... [2024-10-13 12:32:22,514 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-13 12:32:23,004 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 12:32:23,028 INFO L200 MainTranslator]: Completed pre-run [2024-10-13 12:32:23,097 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 12:32:23,199 INFO L204 MainTranslator]: Completed translation [2024-10-13 12:32:23,200 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:32:23 WrapperNode [2024-10-13 12:32:23,200 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-13 12:32:23,201 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-13 12:32:23,201 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-13 12:32:23,202 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-13 12:32:23,208 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:32:23" (1/1) ... [2024-10-13 12:32:23,231 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:32:23" (1/1) ... [2024-10-13 12:32:23,264 INFO L138 Inliner]: procedures = 272, calls = 48, calls flagged for inlining = 7, calls inlined = 10, statements flattened = 285 [2024-10-13 12:32:23,265 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-13 12:32:23,266 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-13 12:32:23,266 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-13 12:32:23,266 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-13 12:32:23,278 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:32:23" (1/1) ... [2024-10-13 12:32:23,278 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:32:23" (1/1) ... [2024-10-13 12:32:23,285 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:32:23" (1/1) ... [2024-10-13 12:32:23,309 INFO L175 MemorySlicer]: Split 25 memory accesses to 4 slices as follows [2, 5, 2, 16]. 64 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [2, 5, 0, 0]. The 8 writes are split as follows [0, 0, 1, 7]. [2024-10-13 12:32:23,309 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:32:23" (1/1) ... [2024-10-13 12:32:23,310 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:32:23" (1/1) ... [2024-10-13 12:32:23,319 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:32:23" (1/1) ... [2024-10-13 12:32:23,324 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:32:23" (1/1) ... [2024-10-13 12:32:23,330 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:32:23" (1/1) ... [2024-10-13 12:32:23,331 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:32:23" (1/1) ... [2024-10-13 12:32:23,338 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-13 12:32:23,340 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-13 12:32:23,340 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-13 12:32:23,341 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-13 12:32:23,342 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:32:23" (1/1) ... [2024-10-13 12:32:23,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 12:32:23,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 12:32:23,372 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-13 12:32:23,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-13 12:32:23,418 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-13 12:32:23,419 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-13 12:32:23,419 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-10-13 12:32:23,419 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-13 12:32:23,419 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-13 12:32:23,419 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-13 12:32:23,419 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-10-13 12:32:23,419 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-13 12:32:23,419 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-13 12:32:23,419 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-13 12:32:23,419 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-10-13 12:32:23,420 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-10-13 12:32:23,420 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-13 12:32:23,420 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2024-10-13 12:32:23,420 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2024-10-13 12:32:23,420 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-13 12:32:23,420 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-13 12:32:23,420 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-13 12:32:23,420 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-10-13 12:32:23,420 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-13 12:32:23,420 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-13 12:32:23,423 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-13 12:32:23,577 INFO L238 CfgBuilder]: Building ICFG [2024-10-13 12:32:23,579 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-13 12:32:23,988 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-13 12:32:23,988 INFO L287 CfgBuilder]: Performing block encoding [2024-10-13 12:32:24,187 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-13 12:32:24,187 INFO L314 CfgBuilder]: Removed 35 assume(true) statements. [2024-10-13 12:32:24,188 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:32:24 BoogieIcfgContainer [2024-10-13 12:32:24,188 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-13 12:32:24,191 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-13 12:32:24,191 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-13 12:32:24,195 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-13 12:32:24,195 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 12:32:22" (1/3) ... [2024-10-13 12:32:24,195 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54550a07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 12:32:24, skipping insertion in model container [2024-10-13 12:32:24,195 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:32:23" (2/3) ... [2024-10-13 12:32:24,196 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54550a07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 12:32:24, skipping insertion in model container [2024-10-13 12:32:24,196 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:32:24" (3/3) ... [2024-10-13 12:32:24,198 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_71-funloop_racing.i [2024-10-13 12:32:24,214 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-13 12:32:24,215 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 38 error locations. [2024-10-13 12:32:24,215 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-13 12:32:24,280 INFO L143 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2024-10-13 12:32:24,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 156 places, 196 transitions, 399 flow [2024-10-13 12:32:24,416 INFO L124 PetriNetUnfolderBase]: 70/323 cut-off events. [2024-10-13 12:32:24,417 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-10-13 12:32:24,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 328 conditions, 323 events. 70/323 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1886 event pairs, 0 based on Foata normal form. 0/185 useless extension candidates. Maximal degree in co-relation 189. Up to 8 conditions per place. [2024-10-13 12:32:24,427 INFO L82 GeneralOperation]: Start removeDead. Operand has 156 places, 196 transitions, 399 flow [2024-10-13 12:32:24,438 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 156 places, 196 transitions, 399 flow [2024-10-13 12:32:24,450 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-13 12:32:24,458 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;@13afc87d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-13 12:32:24,460 INFO L334 AbstractCegarLoop]: Starting to check reachability of 50 error locations. [2024-10-13 12:32:24,465 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-13 12:32:24,467 INFO L124 PetriNetUnfolderBase]: 1/6 cut-off events. [2024-10-13 12:32:24,467 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-13 12:32:24,467 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:32:24,468 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-10-13 12:32:24,469 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-10-13 12:32:24,475 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:32:24,475 INFO L85 PathProgramCache]: Analyzing trace with hash 23822674, now seen corresponding path program 1 times [2024-10-13 12:32:24,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:32:24,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598792256] [2024-10-13 12:32:24,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:32:24,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:32:24,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:32:24,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:32:24,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:32:24,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598792256] [2024-10-13 12:32:24,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598792256] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:32:24,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:32:24,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 12:32:24,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983391742] [2024-10-13 12:32:24,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:32:24,775 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 12:32:24,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:32:24,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 12:32:24,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 12:32:24,817 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 196 [2024-10-13 12:32:24,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 196 transitions, 399 flow. Second operand has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:32:24,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:32:24,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 196 [2024-10-13 12:32:24,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:32:25,518 INFO L124 PetriNetUnfolderBase]: 1016/3457 cut-off events. [2024-10-13 12:32:25,520 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-10-13 12:32:25,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5382 conditions, 3457 events. 1016/3457 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 30765 event pairs, 861 based on Foata normal form. 708/3646 useless extension candidates. Maximal degree in co-relation 5218. Up to 1919 conditions per place. [2024-10-13 12:32:25,554 INFO L140 encePairwiseOnDemand]: 157/196 looper letters, 69 selfloop transitions, 2 changer transitions 0/158 dead transitions. [2024-10-13 12:32:25,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 158 transitions, 465 flow [2024-10-13 12:32:25,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 12:32:25,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 12:32:25,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 369 transitions. [2024-10-13 12:32:25,574 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6275510204081632 [2024-10-13 12:32:25,577 INFO L175 Difference]: Start difference. First operand has 156 places, 196 transitions, 399 flow. Second operand 3 states and 369 transitions. [2024-10-13 12:32:25,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 158 transitions, 465 flow [2024-10-13 12:32:25,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 158 transitions, 465 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-13 12:32:25,591 INFO L231 Difference]: Finished difference. Result has 156 places, 158 transitions, 333 flow [2024-10-13 12:32:25,594 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=196, PETRI_DIFFERENCE_MINUEND_FLOW=321, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=333, PETRI_PLACES=156, PETRI_TRANSITIONS=158} [2024-10-13 12:32:25,600 INFO L277 CegarLoopForPetriNet]: 156 programPoint places, 0 predicate places. [2024-10-13 12:32:25,601 INFO L471 AbstractCegarLoop]: Abstraction has has 156 places, 158 transitions, 333 flow [2024-10-13 12:32:25,601 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:32:25,601 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:32:25,601 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-10-13 12:32:25,602 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-13 12:32:25,602 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-10-13 12:32:25,602 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:32:25,603 INFO L85 PathProgramCache]: Analyzing trace with hash 738508764, now seen corresponding path program 1 times [2024-10-13 12:32:25,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:32:25,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597808728] [2024-10-13 12:32:25,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:32:25,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:32:25,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:32:25,705 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:32:25,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:32:25,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597808728] [2024-10-13 12:32:25,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597808728] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 12:32:25,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593678585] [2024-10-13 12:32:25,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:32:25,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 12:32:25,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 12:32:25,709 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 12:32:25,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-13 12:32:25,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:32:25,814 INFO L255 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-13 12:32:25,820 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:32:25,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:32:25,860 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 12:32:25,885 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:32:25,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593678585] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 12:32:25,886 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 12:32:25,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-10-13 12:32:25,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714289532] [2024-10-13 12:32:25,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 12:32:25,888 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-13 12:32:25,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:32:25,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-13 12:32:25,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-10-13 12:32:25,895 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 196 [2024-10-13 12:32:25,900 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 158 transitions, 333 flow. Second operand has 7 states, 7 states have (on average 88.28571428571429) internal successors, (618), 7 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:32:25,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:32:25,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 196 [2024-10-13 12:32:25,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:32:26,462 INFO L124 PetriNetUnfolderBase]: 1016/3460 cut-off events. [2024-10-13 12:32:26,464 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-10-13 12:32:26,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5398 conditions, 3460 events. 1016/3460 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 30764 event pairs, 861 based on Foata normal form. 0/2941 useless extension candidates. Maximal degree in co-relation 5386. Up to 1919 conditions per place. [2024-10-13 12:32:26,489 INFO L140 encePairwiseOnDemand]: 193/196 looper letters, 69 selfloop transitions, 5 changer transitions 0/161 dead transitions. [2024-10-13 12:32:26,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 161 transitions, 493 flow [2024-10-13 12:32:26,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-13 12:32:26,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-13 12:32:26,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 599 transitions. [2024-10-13 12:32:26,497 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5093537414965986 [2024-10-13 12:32:26,498 INFO L175 Difference]: Start difference. First operand has 156 places, 158 transitions, 333 flow. Second operand 6 states and 599 transitions. [2024-10-13 12:32:26,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 161 transitions, 493 flow [2024-10-13 12:32:26,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 161 transitions, 489 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-13 12:32:26,506 INFO L231 Difference]: Finished difference. Result has 163 places, 161 transitions, 365 flow [2024-10-13 12:32:26,507 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=196, PETRI_DIFFERENCE_MINUEND_FLOW=329, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=365, PETRI_PLACES=163, PETRI_TRANSITIONS=161} [2024-10-13 12:32:26,508 INFO L277 CegarLoopForPetriNet]: 156 programPoint places, 7 predicate places. [2024-10-13 12:32:26,508 INFO L471 AbstractCegarLoop]: Abstraction has has 163 places, 161 transitions, 365 flow [2024-10-13 12:32:26,509 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 88.28571428571429) internal successors, (618), 7 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:32:26,509 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:32:26,509 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2024-10-13 12:32:26,531 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-13 12:32:26,709 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 12:32:26,710 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-10-13 12:32:26,711 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:32:26,711 INFO L85 PathProgramCache]: Analyzing trace with hash 2097927122, now seen corresponding path program 2 times [2024-10-13 12:32:26,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:32:26,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071540173] [2024-10-13 12:32:26,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:32:26,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:32:26,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:32:26,836 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-13 12:32:26,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:32:26,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071540173] [2024-10-13 12:32:26,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071540173] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:32:26,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:32:26,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 12:32:26,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241324073] [2024-10-13 12:32:26,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:32:26,839 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 12:32:26,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:32:26,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 12:32:26,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 12:32:26,878 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 196 [2024-10-13 12:32:26,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 161 transitions, 365 flow. Second operand has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:32:26,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:32:26,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 196 [2024-10-13 12:32:26,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:32:27,418 INFO L124 PetriNetUnfolderBase]: 1069/3541 cut-off events. [2024-10-13 12:32:27,419 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-10-13 12:32:27,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5590 conditions, 3541 events. 1069/3541 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 31432 event pairs, 861 based on Foata normal form. 0/3059 useless extension candidates. Maximal degree in co-relation 5556. Up to 1915 conditions per place. [2024-10-13 12:32:27,448 INFO L140 encePairwiseOnDemand]: 192/196 looper letters, 96 selfloop transitions, 2 changer transitions 0/181 dead transitions. [2024-10-13 12:32:27,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 181 transitions, 601 flow [2024-10-13 12:32:27,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 12:32:27,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 12:32:27,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 345 transitions. [2024-10-13 12:32:27,451 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5867346938775511 [2024-10-13 12:32:27,451 INFO L175 Difference]: Start difference. First operand has 163 places, 161 transitions, 365 flow. Second operand 3 states and 345 transitions. [2024-10-13 12:32:27,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 181 transitions, 601 flow [2024-10-13 12:32:27,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 181 transitions, 587 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-10-13 12:32:27,456 INFO L231 Difference]: Finished difference. Result has 162 places, 159 transitions, 351 flow [2024-10-13 12:32:27,457 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=196, PETRI_DIFFERENCE_MINUEND_FLOW=347, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=351, PETRI_PLACES=162, PETRI_TRANSITIONS=159} [2024-10-13 12:32:27,457 INFO L277 CegarLoopForPetriNet]: 156 programPoint places, 6 predicate places. [2024-10-13 12:32:27,458 INFO L471 AbstractCegarLoop]: Abstraction has has 162 places, 159 transitions, 351 flow [2024-10-13 12:32:27,458 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:32:27,458 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:32:27,458 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2024-10-13 12:32:27,459 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-13 12:32:27,459 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-10-13 12:32:27,459 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:32:27,459 INFO L85 PathProgramCache]: Analyzing trace with hash 2097927123, now seen corresponding path program 1 times [2024-10-13 12:32:27,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:32:27,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238422446] [2024-10-13 12:32:27,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:32:27,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:32:27,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:32:27,620 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:32:27,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:32:27,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238422446] [2024-10-13 12:32:27,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238422446] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 12:32:27,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332257990] [2024-10-13 12:32:27,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:32:27,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 12:32:27,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 12:32:27,624 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 12:32:27,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-13 12:32:27,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:32:27,701 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-13 12:32:27,703 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:32:27,724 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:32:27,724 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 12:32:27,792 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:32:27,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332257990] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 12:32:27,793 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 12:32:27,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-10-13 12:32:27,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543602761] [2024-10-13 12:32:27,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 12:32:27,794 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-13 12:32:27,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:32:27,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-13 12:32:27,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-10-13 12:32:27,797 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 196 [2024-10-13 12:32:27,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 159 transitions, 351 flow. Second operand has 13 states, 13 states have (on average 88.15384615384616) internal successors, (1146), 13 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:32:27,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:32:27,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 196 [2024-10-13 12:32:27,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:32:28,313 INFO L124 PetriNetUnfolderBase]: 1016/3442 cut-off events. [2024-10-13 12:32:28,313 INFO L125 PetriNetUnfolderBase]: For 83/83 co-relation queries the response was YES. [2024-10-13 12:32:28,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5438 conditions, 3442 events. 1016/3442 cut-off events. For 83/83 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 30435 event pairs, 861 based on Foata normal form. 6/2954 useless extension candidates. Maximal degree in co-relation 5386. Up to 1919 conditions per place. [2024-10-13 12:32:28,345 INFO L140 encePairwiseOnDemand]: 193/196 looper letters, 69 selfloop transitions, 11 changer transitions 0/165 dead transitions. [2024-10-13 12:32:28,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 165 transitions, 547 flow [2024-10-13 12:32:28,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-13 12:32:28,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-10-13 12:32:28,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1130 transitions. [2024-10-13 12:32:28,349 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4804421768707483 [2024-10-13 12:32:28,349 INFO L175 Difference]: Start difference. First operand has 162 places, 159 transitions, 351 flow. Second operand 12 states and 1130 transitions. [2024-10-13 12:32:28,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 165 transitions, 547 flow [2024-10-13 12:32:28,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 165 transitions, 543 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-13 12:32:28,355 INFO L231 Difference]: Finished difference. Result has 177 places, 165 transitions, 431 flow [2024-10-13 12:32:28,355 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=196, PETRI_DIFFERENCE_MINUEND_FLOW=347, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=431, PETRI_PLACES=177, PETRI_TRANSITIONS=165} [2024-10-13 12:32:28,356 INFO L277 CegarLoopForPetriNet]: 156 programPoint places, 21 predicate places. [2024-10-13 12:32:28,356 INFO L471 AbstractCegarLoop]: Abstraction has has 177 places, 165 transitions, 431 flow [2024-10-13 12:32:28,357 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 88.15384615384616) internal successors, (1146), 13 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:32:28,357 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:32:28,357 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1] [2024-10-13 12:32:28,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-13 12:32:28,558 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2024-10-13 12:32:28,560 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-10-13 12:32:28,560 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:32:28,561 INFO L85 PathProgramCache]: Analyzing trace with hash -551454829, now seen corresponding path program 2 times [2024-10-13 12:32:28,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:32:28,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484852449] [2024-10-13 12:32:28,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:32:28,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:32:28,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:32:28,692 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-10-13 12:32:28,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:32:28,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484852449] [2024-10-13 12:32:28,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484852449] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:32:28,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:32:28,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 12:32:28,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799910589] [2024-10-13 12:32:28,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:32:28,695 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 12:32:28,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:32:28,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 12:32:28,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 12:32:28,728 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 196 [2024-10-13 12:32:28,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 165 transitions, 431 flow. Second operand has 3 states, 3 states have (on average 87.66666666666667) internal successors, (263), 3 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:32:28,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:32:28,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 196 [2024-10-13 12:32:28,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:32:29,080 INFO L124 PetriNetUnfolderBase]: 993/3218 cut-off events. [2024-10-13 12:32:29,081 INFO L125 PetriNetUnfolderBase]: For 35/35 co-relation queries the response was YES. [2024-10-13 12:32:29,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5194 conditions, 3218 events. 993/3218 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 28737 event pairs, 0 based on Foata normal form. 1/2790 useless extension candidates. Maximal degree in co-relation 5118. Up to 1887 conditions per place. [2024-10-13 12:32:29,113 INFO L140 encePairwiseOnDemand]: 192/196 looper letters, 102 selfloop transitions, 2 changer transitions 0/188 dead transitions. [2024-10-13 12:32:29,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 188 transitions, 685 flow [2024-10-13 12:32:29,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 12:32:29,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 12:32:29,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 354 transitions. [2024-10-13 12:32:29,115 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6020408163265306 [2024-10-13 12:32:29,115 INFO L175 Difference]: Start difference. First operand has 177 places, 165 transitions, 431 flow. Second operand 3 states and 354 transitions. [2024-10-13 12:32:29,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 188 transitions, 685 flow [2024-10-13 12:32:29,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 188 transitions, 637 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-10-13 12:32:29,122 INFO L231 Difference]: Finished difference. Result has 175 places, 165 transitions, 393 flow [2024-10-13 12:32:29,123 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=196, PETRI_DIFFERENCE_MINUEND_FLOW=383, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=393, PETRI_PLACES=175, PETRI_TRANSITIONS=165} [2024-10-13 12:32:29,124 INFO L277 CegarLoopForPetriNet]: 156 programPoint places, 19 predicate places. [2024-10-13 12:32:29,125 INFO L471 AbstractCegarLoop]: Abstraction has has 175 places, 165 transitions, 393 flow [2024-10-13 12:32:29,125 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 87.66666666666667) internal successors, (263), 3 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:32:29,125 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:32:29,125 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1] [2024-10-13 12:32:29,126 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-13 12:32:29,126 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-10-13 12:32:29,127 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:32:29,127 INFO L85 PathProgramCache]: Analyzing trace with hash -45324805, now seen corresponding path program 1 times [2024-10-13 12:32:29,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:32:29,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484574016] [2024-10-13 12:32:29,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:32:29,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:32:29,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:32:29,301 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-10-13 12:32:29,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:32:29,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484574016] [2024-10-13 12:32:29,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484574016] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 12:32:29,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177124095] [2024-10-13 12:32:29,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:32:29,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 12:32:29,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 12:32:29,305 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 12:32:29,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-13 12:32:29,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:32:29,387 INFO L255 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-13 12:32:29,389 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:32:29,427 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-10-13 12:32:29,485 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-10-13 12:32:29,486 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 12:32:29,560 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-10-13 12:32:29,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177124095] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 12:32:29,561 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 12:32:29,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2024-10-13 12:32:29,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549044736] [2024-10-13 12:32:29,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 12:32:29,561 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-13 12:32:29,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:32:29,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-13 12:32:29,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-10-13 12:32:29,770 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 196 [2024-10-13 12:32:29,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 165 transitions, 393 flow. Second operand has 9 states, 9 states have (on average 87.55555555555556) internal successors, (788), 9 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:32:29,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:32:29,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 196 [2024-10-13 12:32:29,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:32:29,890 INFO L124 PetriNetUnfolderBase]: 72/276 cut-off events. [2024-10-13 12:32:29,890 INFO L125 PetriNetUnfolderBase]: For 122/122 co-relation queries the response was YES. [2024-10-13 12:32:29,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 532 conditions, 276 events. 72/276 cut-off events. For 122/122 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1123 event pairs, 34 based on Foata normal form. 44/292 useless extension candidates. Maximal degree in co-relation 479. Up to 132 conditions per place. [2024-10-13 12:32:29,892 INFO L140 encePairwiseOnDemand]: 192/196 looper letters, 61 selfloop transitions, 2 changer transitions 0/90 dead transitions. [2024-10-13 12:32:29,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 90 transitions, 362 flow [2024-10-13 12:32:29,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-13 12:32:29,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-13 12:32:29,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 395 transitions. [2024-10-13 12:32:29,894 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5038265306122449 [2024-10-13 12:32:29,894 INFO L175 Difference]: Start difference. First operand has 175 places, 165 transitions, 393 flow. Second operand 4 states and 395 transitions. [2024-10-13 12:32:29,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 90 transitions, 362 flow [2024-10-13 12:32:29,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 90 transitions, 356 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-13 12:32:29,896 INFO L231 Difference]: Finished difference. Result has 80 places, 66 transitions, 186 flow [2024-10-13 12:32:29,896 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=196, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=186, PETRI_PLACES=80, PETRI_TRANSITIONS=66} [2024-10-13 12:32:29,898 INFO L277 CegarLoopForPetriNet]: 156 programPoint places, -76 predicate places. [2024-10-13 12:32:29,899 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 66 transitions, 186 flow [2024-10-13 12:32:29,899 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 87.55555555555556) internal successors, (788), 9 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:32:29,899 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:32:29,899 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 2, 2, 1, 1, 1, 1, 1] [2024-10-13 12:32:29,914 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-13 12:32:30,100 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 12:32:30,101 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-10-13 12:32:30,101 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:32:30,101 INFO L85 PathProgramCache]: Analyzing trace with hash -1405068054, now seen corresponding path program 1 times [2024-10-13 12:32:30,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:32:30,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773392087] [2024-10-13 12:32:30,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:32:30,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:32:30,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-13 12:32:30,131 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-13 12:32:30,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-13 12:32:30,157 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-13 12:32:30,157 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-13 12:32:30,158 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (49 of 50 remaining) [2024-10-13 12:32:30,160 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 50 remaining) [2024-10-13 12:32:30,160 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 50 remaining) [2024-10-13 12:32:30,160 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 50 remaining) [2024-10-13 12:32:30,160 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 50 remaining) [2024-10-13 12:32:30,161 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_LEAK (44 of 50 remaining) [2024-10-13 12:32:30,161 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 50 remaining) [2024-10-13 12:32:30,161 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 50 remaining) [2024-10-13 12:32:30,161 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 50 remaining) [2024-10-13 12:32:30,161 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 50 remaining) [2024-10-13 12:32:30,161 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 50 remaining) [2024-10-13 12:32:30,161 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 50 remaining) [2024-10-13 12:32:30,161 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 50 remaining) [2024-10-13 12:32:30,162 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 50 remaining) [2024-10-13 12:32:30,162 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 50 remaining) [2024-10-13 12:32:30,162 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 50 remaining) [2024-10-13 12:32:30,162 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 50 remaining) [2024-10-13 12:32:30,162 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 50 remaining) [2024-10-13 12:32:30,162 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 50 remaining) [2024-10-13 12:32:30,162 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 50 remaining) [2024-10-13 12:32:30,163 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_LEAK (29 of 50 remaining) [2024-10-13 12:32:30,163 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 50 remaining) [2024-10-13 12:32:30,163 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 50 remaining) [2024-10-13 12:32:30,163 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 50 remaining) [2024-10-13 12:32:30,163 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 50 remaining) [2024-10-13 12:32:30,163 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 50 remaining) [2024-10-13 12:32:30,163 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 50 remaining) [2024-10-13 12:32:30,163 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK (22 of 50 remaining) [2024-10-13 12:32:30,164 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 50 remaining) [2024-10-13 12:32:30,164 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 50 remaining) [2024-10-13 12:32:30,164 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 50 remaining) [2024-10-13 12:32:30,164 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 50 remaining) [2024-10-13 12:32:30,164 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 50 remaining) [2024-10-13 12:32:30,164 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 50 remaining) [2024-10-13 12:32:30,164 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 50 remaining) [2024-10-13 12:32:30,165 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 50 remaining) [2024-10-13 12:32:30,165 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 50 remaining) [2024-10-13 12:32:30,165 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 50 remaining) [2024-10-13 12:32:30,165 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (11 of 50 remaining) [2024-10-13 12:32:30,165 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 50 remaining) [2024-10-13 12:32:30,165 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 50 remaining) [2024-10-13 12:32:30,165 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 50 remaining) [2024-10-13 12:32:30,165 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 50 remaining) [2024-10-13 12:32:30,165 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 50 remaining) [2024-10-13 12:32:30,166 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 50 remaining) [2024-10-13 12:32:30,166 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 50 remaining) [2024-10-13 12:32:30,166 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 50 remaining) [2024-10-13 12:32:30,166 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 50 remaining) [2024-10-13 12:32:30,166 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 50 remaining) [2024-10-13 12:32:30,166 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (0 of 50 remaining) [2024-10-13 12:32:30,166 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-10-13 12:32:30,167 INFO L407 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1] [2024-10-13 12:32:30,169 WARN L239 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-13 12:32:30,169 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-10-13 12:32:30,203 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-10-13 12:32:30,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 206 places, 259 transitions, 534 flow [2024-10-13 12:32:30,238 INFO L124 PetriNetUnfolderBase]: 113/525 cut-off events. [2024-10-13 12:32:30,238 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-10-13 12:32:30,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 537 conditions, 525 events. 113/525 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 3427 event pairs, 0 based on Foata normal form. 0/302 useless extension candidates. Maximal degree in co-relation 325. Up to 12 conditions per place. [2024-10-13 12:32:30,245 INFO L82 GeneralOperation]: Start removeDead. Operand has 206 places, 259 transitions, 534 flow [2024-10-13 12:32:30,250 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 206 places, 259 transitions, 534 flow [2024-10-13 12:32:30,251 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-13 12:32:30,252 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;@13afc87d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-13 12:32:30,252 INFO L334 AbstractCegarLoop]: Starting to check reachability of 61 error locations. [2024-10-13 12:32:30,253 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-13 12:32:30,253 INFO L124 PetriNetUnfolderBase]: 1/6 cut-off events. [2024-10-13 12:32:30,253 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-13 12:32:30,253 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:32:30,253 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-10-13 12:32:30,254 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2024-10-13 12:32:30,254 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:32:30,254 INFO L85 PathProgramCache]: Analyzing trace with hash 31795730, now seen corresponding path program 1 times [2024-10-13 12:32:30,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:32:30,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105835403] [2024-10-13 12:32:30,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:32:30,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:32:30,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:32:30,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:32:30,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:32:30,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105835403] [2024-10-13 12:32:30,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105835403] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:32:30,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:32:30,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 12:32:30,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264660890] [2024-10-13 12:32:30,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:32:30,270 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 12:32:30,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:32:30,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 12:32:30,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 12:32:30,271 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 259 [2024-10-13 12:32:30,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 259 transitions, 534 flow. Second operand has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:32:30,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:32:30,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 259 [2024-10-13 12:32:30,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:32:37,327 INFO L124 PetriNetUnfolderBase]: 44674/99599 cut-off events. [2024-10-13 12:32:37,327 INFO L125 PetriNetUnfolderBase]: For 282/282 co-relation queries the response was YES. [2024-10-13 12:32:37,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 164300 conditions, 99599 events. 44674/99599 cut-off events. For 282/282 co-relation queries the response was YES. Maximal size of possible extension queue 2867. Compared 1207882 event pairs, 39313 based on Foata normal form. 23707/109828 useless extension candidates. Maximal degree in co-relation 151614. Up to 64558 conditions per place. [2024-10-13 12:32:38,035 INFO L140 encePairwiseOnDemand]: 208/259 looper letters, 93 selfloop transitions, 2 changer transitions 0/208 dead transitions. [2024-10-13 12:32:38,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 208 transitions, 622 flow [2024-10-13 12:32:38,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 12:32:38,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 12:32:38,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 483 transitions. [2024-10-13 12:32:38,039 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6216216216216216 [2024-10-13 12:32:38,039 INFO L175 Difference]: Start difference. First operand has 206 places, 259 transitions, 534 flow. Second operand 3 states and 483 transitions. [2024-10-13 12:32:38,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 208 transitions, 622 flow [2024-10-13 12:32:38,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 208 transitions, 622 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-13 12:32:38,046 INFO L231 Difference]: Finished difference. Result has 205 places, 208 transitions, 442 flow [2024-10-13 12:32:38,047 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=259, PETRI_DIFFERENCE_MINUEND_FLOW=430, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=442, PETRI_PLACES=205, PETRI_TRANSITIONS=208} [2024-10-13 12:32:38,048 INFO L277 CegarLoopForPetriNet]: 206 programPoint places, -1 predicate places. [2024-10-13 12:32:38,048 INFO L471 AbstractCegarLoop]: Abstraction has has 205 places, 208 transitions, 442 flow [2024-10-13 12:32:38,048 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:32:38,049 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:32:38,049 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-10-13 12:32:38,049 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-10-13 12:32:38,049 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2024-10-13 12:32:38,049 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:32:38,049 INFO L85 PathProgramCache]: Analyzing trace with hash 985673759, now seen corresponding path program 1 times [2024-10-13 12:32:38,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:32:38,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650005797] [2024-10-13 12:32:38,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:32:38,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:32:38,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:32:38,086 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:32:38,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:32:38,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650005797] [2024-10-13 12:32:38,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650005797] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 12:32:38,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340481264] [2024-10-13 12:32:38,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:32:38,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 12:32:38,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 12:32:38,089 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 12:32:38,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-13 12:32:38,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:32:38,156 INFO L255 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-13 12:32:38,156 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:32:38,165 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:32:38,165 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 12:32:38,175 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:32:38,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340481264] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 12:32:38,176 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 12:32:38,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-10-13 12:32:38,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023518726] [2024-10-13 12:32:38,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 12:32:38,177 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-13 12:32:38,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:32:38,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-13 12:32:38,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-10-13 12:32:38,178 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 259 [2024-10-13 12:32:38,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 208 transitions, 442 flow. Second operand has 7 states, 7 states have (on average 114.28571428571429) internal successors, (800), 7 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:32:38,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:32:38,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 259 [2024-10-13 12:32:38,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:32:44,797 INFO L124 PetriNetUnfolderBase]: 44674/99602 cut-off events. [2024-10-13 12:32:44,797 INFO L125 PetriNetUnfolderBase]: For 282/282 co-relation queries the response was YES. [2024-10-13 12:32:45,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 164316 conditions, 99602 events. 44674/99602 cut-off events. For 282/282 co-relation queries the response was YES. Maximal size of possible extension queue 2867. Compared 1207887 event pairs, 39313 based on Foata normal form. 0/86124 useless extension candidates. Maximal degree in co-relation 164303. Up to 64558 conditions per place. [2024-10-13 12:32:45,635 INFO L140 encePairwiseOnDemand]: 256/259 looper letters, 93 selfloop transitions, 5 changer transitions 0/211 dead transitions. [2024-10-13 12:32:45,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 211 transitions, 650 flow [2024-10-13 12:32:45,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-13 12:32:45,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-13 12:32:45,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 779 transitions. [2024-10-13 12:32:45,638 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5012870012870013 [2024-10-13 12:32:45,639 INFO L175 Difference]: Start difference. First operand has 205 places, 208 transitions, 442 flow. Second operand 6 states and 779 transitions. [2024-10-13 12:32:45,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 211 transitions, 650 flow [2024-10-13 12:32:45,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 211 transitions, 646 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-13 12:32:45,643 INFO L231 Difference]: Finished difference. Result has 212 places, 211 transitions, 474 flow [2024-10-13 12:32:45,644 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=259, PETRI_DIFFERENCE_MINUEND_FLOW=438, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=474, PETRI_PLACES=212, PETRI_TRANSITIONS=211} [2024-10-13 12:32:45,645 INFO L277 CegarLoopForPetriNet]: 206 programPoint places, 6 predicate places. [2024-10-13 12:32:45,645 INFO L471 AbstractCegarLoop]: Abstraction has has 212 places, 211 transitions, 474 flow [2024-10-13 12:32:45,646 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 114.28571428571429) internal successors, (800), 7 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:32:45,646 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:32:45,646 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2024-10-13 12:32:45,662 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-10-13 12:32:45,853 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 12:32:45,853 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2024-10-13 12:32:45,854 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:32:45,854 INFO L85 PathProgramCache]: Analyzing trace with hash -478362286, now seen corresponding path program 2 times [2024-10-13 12:32:45,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:32:45,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610028166] [2024-10-13 12:32:45,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:32:45,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:32:45,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:32:45,879 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-13 12:32:45,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:32:45,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610028166] [2024-10-13 12:32:45,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610028166] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:32:45,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:32:45,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 12:32:45,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069946193] [2024-10-13 12:32:45,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:32:45,880 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 12:32:45,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:32:45,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 12:32:45,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 12:32:45,917 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 259 [2024-10-13 12:32:45,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 211 transitions, 474 flow. Second operand has 3 states, 3 states have (on average 110.66666666666667) internal successors, (332), 3 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:32:45,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:32:45,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 259 [2024-10-13 12:32:45,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:32:53,204 INFO L124 PetriNetUnfolderBase]: 47090/103142 cut-off events. [2024-10-13 12:32:53,204 INFO L125 PetriNetUnfolderBase]: For 166/166 co-relation queries the response was YES. [2024-10-13 12:32:53,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 171284 conditions, 103142 events. 47090/103142 cut-off events. For 166/166 co-relation queries the response was YES. Maximal size of possible extension queue 3014. Compared 1242082 event pairs, 39292 based on Foata normal form. 0/89868 useless extension candidates. Maximal degree in co-relation 171249. Up to 64472 conditions per place. [2024-10-13 12:32:53,982 INFO L140 encePairwiseOnDemand]: 255/259 looper letters, 142 selfloop transitions, 2 changer transitions 0/253 dead transitions. [2024-10-13 12:32:53,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 253 transitions, 846 flow [2024-10-13 12:32:53,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 12:32:53,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 12:32:53,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 469 transitions. [2024-10-13 12:32:53,984 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6036036036036037 [2024-10-13 12:32:53,984 INFO L175 Difference]: Start difference. First operand has 212 places, 211 transitions, 474 flow. Second operand 3 states and 469 transitions. [2024-10-13 12:32:53,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 253 transitions, 846 flow [2024-10-13 12:32:53,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 253 transitions, 832 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-10-13 12:32:53,987 INFO L231 Difference]: Finished difference. Result has 211 places, 209 transitions, 460 flow [2024-10-13 12:32:53,988 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=259, PETRI_DIFFERENCE_MINUEND_FLOW=456, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=460, PETRI_PLACES=211, PETRI_TRANSITIONS=209} [2024-10-13 12:32:53,988 INFO L277 CegarLoopForPetriNet]: 206 programPoint places, 5 predicate places. [2024-10-13 12:32:53,988 INFO L471 AbstractCegarLoop]: Abstraction has has 211 places, 209 transitions, 460 flow [2024-10-13 12:32:53,989 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 110.66666666666667) internal successors, (332), 3 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:32:53,989 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:32:53,989 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2024-10-13 12:32:53,989 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-10-13 12:32:53,989 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2024-10-13 12:32:53,989 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:32:53,989 INFO L85 PathProgramCache]: Analyzing trace with hash -478362285, now seen corresponding path program 1 times [2024-10-13 12:32:53,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:32:53,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641662057] [2024-10-13 12:32:53,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:32:53,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:32:53,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:32:54,047 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:32:54,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:32:54,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641662057] [2024-10-13 12:32:54,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641662057] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 12:32:54,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191804249] [2024-10-13 12:32:54,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:32:54,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 12:32:54,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 12:32:54,051 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 12:32:54,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-13 12:32:54,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:32:54,120 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-13 12:32:54,121 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:32:54,137 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:32:54,137 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 12:32:54,182 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:32:54,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191804249] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 12:32:54,183 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 12:32:54,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-10-13 12:32:54,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881095494] [2024-10-13 12:32:54,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 12:32:54,183 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-13 12:32:54,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:32:54,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-13 12:32:54,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-10-13 12:32:54,185 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 259 [2024-10-13 12:32:54,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 209 transitions, 460 flow. Second operand has 13 states, 13 states have (on average 114.15384615384616) internal successors, (1484), 13 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:32:54,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:32:54,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 259 [2024-10-13 12:32:54,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:33:01,424 INFO L124 PetriNetUnfolderBase]: 44674/99280 cut-off events. [2024-10-13 12:33:01,425 INFO L125 PetriNetUnfolderBase]: For 1253/1253 co-relation queries the response was YES. [2024-10-13 12:33:01,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 164966 conditions, 99280 events. 44674/99280 cut-off events. For 1253/1253 co-relation queries the response was YES. Maximal size of possible extension queue 2860. Compared 1200498 event pairs, 39313 based on Foata normal form. 6/86137 useless extension candidates. Maximal degree in co-relation 164913. Up to 64558 conditions per place. [2024-10-13 12:33:02,169 INFO L140 encePairwiseOnDemand]: 256/259 looper letters, 93 selfloop transitions, 11 changer transitions 0/215 dead transitions. [2024-10-13 12:33:02,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 215 transitions, 704 flow [2024-10-13 12:33:02,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-13 12:33:02,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-10-13 12:33:02,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1466 transitions. [2024-10-13 12:33:02,172 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4716859716859717 [2024-10-13 12:33:02,172 INFO L175 Difference]: Start difference. First operand has 211 places, 209 transitions, 460 flow. Second operand 12 states and 1466 transitions. [2024-10-13 12:33:02,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 215 transitions, 704 flow [2024-10-13 12:33:02,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 215 transitions, 700 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-13 12:33:02,221 INFO L231 Difference]: Finished difference. Result has 226 places, 215 transitions, 540 flow [2024-10-13 12:33:02,221 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=259, PETRI_DIFFERENCE_MINUEND_FLOW=456, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=540, PETRI_PLACES=226, PETRI_TRANSITIONS=215} [2024-10-13 12:33:02,221 INFO L277 CegarLoopForPetriNet]: 206 programPoint places, 20 predicate places. [2024-10-13 12:33:02,222 INFO L471 AbstractCegarLoop]: Abstraction has has 226 places, 215 transitions, 540 flow [2024-10-13 12:33:02,222 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 114.15384615384616) internal successors, (1484), 13 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:33:02,222 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:33:02,222 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1] [2024-10-13 12:33:02,235 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-13 12:33:02,423 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-10-13 12:33:02,423 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2024-10-13 12:33:02,424 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:33:02,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1423318477, now seen corresponding path program 2 times [2024-10-13 12:33:02,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:33:02,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032950918] [2024-10-13 12:33:02,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:33:02,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:33:02,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:33:02,501 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-10-13 12:33:02,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:33:02,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032950918] [2024-10-13 12:33:02,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032950918] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:33:02,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:33:02,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 12:33:02,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752158265] [2024-10-13 12:33:02,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:33:02,502 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 12:33:02,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:33:02,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 12:33:02,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 12:33:02,552 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 259 [2024-10-13 12:33:02,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 215 transitions, 540 flow. Second operand has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:33:02,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:33:02,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 259 [2024-10-13 12:33:02,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand