./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 84cfde4a Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_71-funloop_racing.i -s /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash bde6fe221f69c3fccb0f7c90e011f0b13ab5ca582ddcd328a459cbb512a8fd7f --- Real Ultimate output --- This is Ultimate 0.2.5-dev-84cfde4 [2024-10-11 19:47:48,336 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-11 19:47:48,403 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-11 19:47:48,408 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-11 19:47:48,409 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-11 19:47:48,437 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-11 19:47:48,438 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-11 19:47:48,438 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-11 19:47:48,438 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-11 19:47:48,439 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-11 19:47:48,439 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-11 19:47:48,439 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-11 19:47:48,440 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-11 19:47:48,440 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-11 19:47:48,440 INFO L153 SettingsManager]: * Use SBE=true [2024-10-11 19:47:48,440 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-11 19:47:48,441 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-11 19:47:48,442 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-11 19:47:48,442 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-11 19:47:48,443 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-11 19:47:48,443 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-11 19:47:48,444 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-11 19:47:48,444 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-11 19:47:48,445 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-11 19:47:48,445 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-11 19:47:48,445 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-11 19:47:48,445 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-11 19:47:48,445 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-11 19:47:48,445 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-11 19:47:48,445 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-11 19:47:48,446 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-11 19:47:48,446 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-11 19:47:48,446 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-11 19:47:48,446 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 19:47:48,446 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-11 19:47:48,446 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-11 19:47:48,446 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-11 19:47:48,447 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-11 19:47:48,447 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-11 19:47:48,447 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-11 19:47:48,447 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-11 19:47:48,449 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-11 19:47:48,449 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bde6fe221f69c3fccb0f7c90e011f0b13ab5ca582ddcd328a459cbb512a8fd7f [2024-10-11 19:47:48,658 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-11 19:47:48,679 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-11 19:47:48,681 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-11 19:47:48,682 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-11 19:47:48,682 INFO L274 PluginConnector]: CDTParser initialized [2024-10-11 19:47:48,683 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_71-funloop_racing.i [2024-10-11 19:47:49,904 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-11 19:47:50,124 INFO L384 CDTParser]: Found 1 translation units. [2024-10-11 19:47:50,125 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_71-funloop_racing.i [2024-10-11 19:47:50,139 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/210f06050/cb007f83e8b243e18938d9d725986ac2/FLAGe9ca6aaf1 [2024-10-11 19:47:50,151 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/210f06050/cb007f83e8b243e18938d9d725986ac2 [2024-10-11 19:47:50,154 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-11 19:47:50,155 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-11 19:47:50,158 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-11 19:47:50,158 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-11 19:47:50,162 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-11 19:47:50,163 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 07:47:50" (1/1) ... [2024-10-11 19:47:50,163 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25dcf278 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:47:50, skipping insertion in model container [2024-10-11 19:47:50,163 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 07:47:50" (1/1) ... [2024-10-11 19:47:50,198 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-11 19:47:50,549 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 19:47:50,574 INFO L200 MainTranslator]: Completed pre-run [2024-10-11 19:47:50,636 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 19:47:50,770 INFO L204 MainTranslator]: Completed translation [2024-10-11 19:47:50,771 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:47:50 WrapperNode [2024-10-11 19:47:50,771 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-11 19:47:50,772 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-11 19:47:50,773 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-11 19:47:50,773 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-11 19:47:50,779 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:47:50" (1/1) ... [2024-10-11 19:47:50,804 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:47:50" (1/1) ... [2024-10-11 19:47:50,833 INFO L138 Inliner]: procedures = 272, calls = 48, calls flagged for inlining = 7, calls inlined = 10, statements flattened = 285 [2024-10-11 19:47:50,834 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-11 19:47:50,836 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-11 19:47:50,836 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-11 19:47:50,836 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-11 19:47:50,845 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:47:50" (1/1) ... [2024-10-11 19:47:50,845 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:47:50" (1/1) ... [2024-10-11 19:47:50,850 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:47:50" (1/1) ... [2024-10-11 19:47:50,879 INFO L175 MemorySlicer]: Split 25 memory accesses to 4 slices as follows [2, 2, 5, 16]. 64 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [2, 0, 5, 0]. The 8 writes are split as follows [0, 1, 0, 7]. [2024-10-11 19:47:50,880 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:47:50" (1/1) ... [2024-10-11 19:47:50,880 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:47:50" (1/1) ... [2024-10-11 19:47:50,893 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:47:50" (1/1) ... [2024-10-11 19:47:50,898 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:47:50" (1/1) ... [2024-10-11 19:47:50,899 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:47:50" (1/1) ... [2024-10-11 19:47:50,903 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:47:50" (1/1) ... [2024-10-11 19:47:50,908 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-11 19:47:50,909 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-11 19:47:50,909 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-11 19:47:50,909 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-11 19:47:50,910 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:47:50" (1/1) ... [2024-10-11 19:47:50,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 19:47:50,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 19:47:50,941 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-11 19:47:50,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-11 19:47:50,979 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-11 19:47:50,979 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-11 19:47:50,979 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-10-11 19:47:50,979 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-11 19:47:50,980 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-11 19:47:50,980 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-11 19:47:50,980 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-10-11 19:47:50,980 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-11 19:47:50,980 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-11 19:47:50,980 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-11 19:47:50,980 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-10-11 19:47:50,982 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-10-11 19:47:50,982 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-11 19:47:50,982 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2024-10-11 19:47:50,982 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2024-10-11 19:47:50,982 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-11 19:47:50,982 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-11 19:47:50,982 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-11 19:47:50,982 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-10-11 19:47:50,982 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-11 19:47:50,982 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-11 19:47:50,984 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-11 19:47:51,106 INFO L238 CfgBuilder]: Building ICFG [2024-10-11 19:47:51,108 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-11 19:47:51,485 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-11 19:47:51,486 INFO L287 CfgBuilder]: Performing block encoding [2024-10-11 19:47:51,608 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-11 19:47:51,610 INFO L314 CfgBuilder]: Removed 35 assume(true) statements. [2024-10-11 19:47:51,610 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 07:47:51 BoogieIcfgContainer [2024-10-11 19:47:51,611 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-11 19:47:51,612 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-11 19:47:51,612 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-11 19:47:51,615 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-11 19:47:51,615 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 07:47:50" (1/3) ... [2024-10-11 19:47:51,616 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39790f08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 07:47:51, skipping insertion in model container [2024-10-11 19:47:51,616 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:47:50" (2/3) ... [2024-10-11 19:47:51,616 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39790f08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 07:47:51, skipping insertion in model container [2024-10-11 19:47:51,616 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 07:47:51" (3/3) ... [2024-10-11 19:47:51,617 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_71-funloop_racing.i [2024-10-11 19:47:51,629 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-11 19:47:51,629 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 38 error locations. [2024-10-11 19:47:51,629 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-11 19:47:51,715 INFO L143 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2024-10-11 19:47:51,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 156 places, 196 transitions, 399 flow [2024-10-11 19:47:51,834 INFO L124 PetriNetUnfolderBase]: 70/323 cut-off events. [2024-10-11 19:47:51,835 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-10-11 19:47:51,842 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. [2024-10-11 19:47:51,843 INFO L82 GeneralOperation]: Start removeDead. Operand has 156 places, 196 transitions, 399 flow [2024-10-11 19:47:51,850 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 156 places, 196 transitions, 399 flow [2024-10-11 19:47:51,861 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 19:47:51,868 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;@32135b25, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 19:47:51,868 INFO L334 AbstractCegarLoop]: Starting to check reachability of 50 error locations. [2024-10-11 19:47:51,870 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-11 19:47:51,870 INFO L124 PetriNetUnfolderBase]: 1/6 cut-off events. [2024-10-11 19:47:51,870 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-11 19:47:51,871 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:47:51,871 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-10-11 19:47:51,872 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)] === [2024-10-11 19:47:51,875 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:47:51,875 INFO L85 PathProgramCache]: Analyzing trace with hash 23822674, now seen corresponding path program 1 times [2024-10-11 19:47:51,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:47:51,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680174821] [2024-10-11 19:47:51,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:47:51,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:47:51,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:47:52,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:47:52,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:47:52,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680174821] [2024-10-11 19:47:52,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680174821] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:47:52,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:47:52,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 19:47:52,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132683156] [2024-10-11 19:47:52,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:47:52,082 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 19:47:52,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:47:52,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 19:47:52,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 19:47:52,110 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 196 [2024-10-11 19:47:52,112 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) [2024-10-11 19:47:52,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:47:52,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 196 [2024-10-11 19:47:52,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:47:52,649 INFO L124 PetriNetUnfolderBase]: 1016/3457 cut-off events. [2024-10-11 19:47:52,649 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-10-11 19:47:52,657 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. [2024-10-11 19:47:52,672 INFO L140 encePairwiseOnDemand]: 157/196 looper letters, 69 selfloop transitions, 2 changer transitions 0/158 dead transitions. [2024-10-11 19:47:52,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 158 transitions, 465 flow [2024-10-11 19:47:52,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 19:47:52,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 19:47:52,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 369 transitions. [2024-10-11 19:47:52,685 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6275510204081632 [2024-10-11 19:47:52,687 INFO L175 Difference]: Start difference. First operand has 156 places, 196 transitions, 399 flow. Second operand 3 states and 369 transitions. [2024-10-11 19:47:52,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 158 transitions, 465 flow [2024-10-11 19:47:52,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 158 transitions, 465 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-11 19:47:52,695 INFO L231 Difference]: Finished difference. Result has 156 places, 158 transitions, 333 flow [2024-10-11 19:47:52,697 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} [2024-10-11 19:47:52,701 INFO L277 CegarLoopForPetriNet]: 156 programPoint places, 0 predicate places. [2024-10-11 19:47:52,701 INFO L471 AbstractCegarLoop]: Abstraction has has 156 places, 158 transitions, 333 flow [2024-10-11 19:47:52,701 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) [2024-10-11 19:47:52,702 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:47:52,702 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-10-11 19:47:52,702 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-11 19:47:52,702 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)] === [2024-10-11 19:47:52,703 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:47:52,703 INFO L85 PathProgramCache]: Analyzing trace with hash 738508764, now seen corresponding path program 1 times [2024-10-11 19:47:52,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:47:52,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083049746] [2024-10-11 19:47:52,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:47:52,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:47:52,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:47:52,804 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:47:52,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:47:52,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083049746] [2024-10-11 19:47:52,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083049746] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 19:47:52,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148222392] [2024-10-11 19:47:52,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:47:52,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:47:52,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 19:47:52,807 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 19:47:52,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-11 19:47:52,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:47:52,882 INFO L255 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-11 19:47:52,885 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:47:52,909 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:47:52,909 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:47:52,924 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:47:52,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148222392] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:47:52,925 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 19:47:52,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-10-11 19:47:52,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513111317] [2024-10-11 19:47:52,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 19:47:52,927 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-11 19:47:52,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:47:52,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-11 19:47:52,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-10-11 19:47:52,930 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 196 [2024-10-11 19:47:52,933 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) [2024-10-11 19:47:52,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:47:52,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 196 [2024-10-11 19:47:52,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:47:53,344 INFO L124 PetriNetUnfolderBase]: 1016/3460 cut-off events. [2024-10-11 19:47:53,344 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-10-11 19:47:53,348 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. [2024-10-11 19:47:53,356 INFO L140 encePairwiseOnDemand]: 193/196 looper letters, 69 selfloop transitions, 5 changer transitions 0/161 dead transitions. [2024-10-11 19:47:53,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 161 transitions, 493 flow [2024-10-11 19:47:53,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-11 19:47:53,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-11 19:47:53,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 599 transitions. [2024-10-11 19:47:53,361 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5093537414965986 [2024-10-11 19:47:53,362 INFO L175 Difference]: Start difference. First operand has 156 places, 158 transitions, 333 flow. Second operand 6 states and 599 transitions. [2024-10-11 19:47:53,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 161 transitions, 493 flow [2024-10-11 19:47:53,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 161 transitions, 489 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-11 19:47:53,367 INFO L231 Difference]: Finished difference. Result has 163 places, 161 transitions, 365 flow [2024-10-11 19:47:53,367 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} [2024-10-11 19:47:53,368 INFO L277 CegarLoopForPetriNet]: 156 programPoint places, 7 predicate places. [2024-10-11 19:47:53,368 INFO L471 AbstractCegarLoop]: Abstraction has has 163 places, 161 transitions, 365 flow [2024-10-11 19:47:53,369 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) [2024-10-11 19:47:53,369 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:47:53,369 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2024-10-11 19:47:53,383 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-11 19:47:53,570 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:47:53,571 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)] === [2024-10-11 19:47:53,572 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:47:53,572 INFO L85 PathProgramCache]: Analyzing trace with hash 2097927122, now seen corresponding path program 2 times [2024-10-11 19:47:53,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:47:53,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872864480] [2024-10-11 19:47:53,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:47:53,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:47:53,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:47:53,642 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-11 19:47:53,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:47:53,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872864480] [2024-10-11 19:47:53,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872864480] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:47:53,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:47:53,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 19:47:53,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96413480] [2024-10-11 19:47:53,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:47:53,643 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 19:47:53,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:47:53,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 19:47:53,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 19:47:53,688 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 196 [2024-10-11 19:47:53,688 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) [2024-10-11 19:47:53,689 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:47:53,689 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 196 [2024-10-11 19:47:53,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:47:54,013 INFO L124 PetriNetUnfolderBase]: 1069/3541 cut-off events. [2024-10-11 19:47:54,014 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-10-11 19:47:54,018 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. [2024-10-11 19:47:54,027 INFO L140 encePairwiseOnDemand]: 192/196 looper letters, 96 selfloop transitions, 2 changer transitions 0/181 dead transitions. [2024-10-11 19:47:54,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 181 transitions, 601 flow [2024-10-11 19:47:54,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 19:47:54,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 19:47:54,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 345 transitions. [2024-10-11 19:47:54,029 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5867346938775511 [2024-10-11 19:47:54,029 INFO L175 Difference]: Start difference. First operand has 163 places, 161 transitions, 365 flow. Second operand 3 states and 345 transitions. [2024-10-11 19:47:54,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 181 transitions, 601 flow [2024-10-11 19:47:54,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 181 transitions, 587 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-10-11 19:47:54,036 INFO L231 Difference]: Finished difference. Result has 162 places, 159 transitions, 351 flow [2024-10-11 19:47:54,036 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} [2024-10-11 19:47:54,037 INFO L277 CegarLoopForPetriNet]: 156 programPoint places, 6 predicate places. [2024-10-11 19:47:54,037 INFO L471 AbstractCegarLoop]: Abstraction has has 162 places, 159 transitions, 351 flow [2024-10-11 19:47:54,038 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) [2024-10-11 19:47:54,038 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:47:54,038 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2024-10-11 19:47:54,038 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-11 19:47:54,039 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)] === [2024-10-11 19:47:54,039 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:47:54,039 INFO L85 PathProgramCache]: Analyzing trace with hash 2097927123, now seen corresponding path program 1 times [2024-10-11 19:47:54,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:47:54,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509077657] [2024-10-11 19:47:54,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:47:54,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:47:54,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:47:54,124 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:47:54,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:47:54,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509077657] [2024-10-11 19:47:54,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509077657] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 19:47:54,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704160773] [2024-10-11 19:47:54,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:47:54,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:47:54,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 19:47:54,127 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 19:47:54,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-11 19:47:54,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:47:54,187 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-11 19:47:54,187 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:47:54,200 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:47:54,200 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:47:54,249 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:47:54,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704160773] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:47:54,250 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 19:47:54,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-10-11 19:47:54,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449842545] [2024-10-11 19:47:54,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 19:47:54,251 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-11 19:47:54,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:47:54,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-11 19:47:54,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-10-11 19:47:54,253 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 196 [2024-10-11 19:47:54,255 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) [2024-10-11 19:47:54,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:47:54,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 196 [2024-10-11 19:47:54,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:47:54,701 INFO L124 PetriNetUnfolderBase]: 1016/3442 cut-off events. [2024-10-11 19:47:54,701 INFO L125 PetriNetUnfolderBase]: For 83/83 co-relation queries the response was YES. [2024-10-11 19:47:54,707 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. [2024-10-11 19:47:54,717 INFO L140 encePairwiseOnDemand]: 193/196 looper letters, 69 selfloop transitions, 11 changer transitions 0/165 dead transitions. [2024-10-11 19:47:54,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 165 transitions, 547 flow [2024-10-11 19:47:54,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-11 19:47:54,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-10-11 19:47:54,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1130 transitions. [2024-10-11 19:47:54,721 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4804421768707483 [2024-10-11 19:47:54,721 INFO L175 Difference]: Start difference. First operand has 162 places, 159 transitions, 351 flow. Second operand 12 states and 1130 transitions. [2024-10-11 19:47:54,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 165 transitions, 547 flow [2024-10-11 19:47:54,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 165 transitions, 543 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-11 19:47:54,727 INFO L231 Difference]: Finished difference. Result has 177 places, 165 transitions, 431 flow [2024-10-11 19:47:54,727 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} [2024-10-11 19:47:54,729 INFO L277 CegarLoopForPetriNet]: 156 programPoint places, 21 predicate places. [2024-10-11 19:47:54,729 INFO L471 AbstractCegarLoop]: Abstraction has has 177 places, 165 transitions, 431 flow [2024-10-11 19:47:54,730 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) [2024-10-11 19:47:54,730 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:47:54,730 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1] [2024-10-11 19:47:54,743 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-11 19:47:54,931 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:47:54,933 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)] === [2024-10-11 19:47:54,934 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:47:54,934 INFO L85 PathProgramCache]: Analyzing trace with hash -551454829, now seen corresponding path program 2 times [2024-10-11 19:47:54,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:47:54,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614782280] [2024-10-11 19:47:54,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:47:54,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:47:54,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:47:55,059 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-10-11 19:47:55,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:47:55,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614782280] [2024-10-11 19:47:55,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614782280] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:47:55,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:47:55,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 19:47:55,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433899766] [2024-10-11 19:47:55,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:47:55,063 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 19:47:55,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:47:55,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 19:47:55,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 19:47:55,091 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 196 [2024-10-11 19:47:55,091 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) [2024-10-11 19:47:55,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:47:55,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 196 [2024-10-11 19:47:55,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:47:55,392 INFO L124 PetriNetUnfolderBase]: 993/3218 cut-off events. [2024-10-11 19:47:55,392 INFO L125 PetriNetUnfolderBase]: For 35/35 co-relation queries the response was YES. [2024-10-11 19:47:55,398 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. [2024-10-11 19:47:55,413 INFO L140 encePairwiseOnDemand]: 192/196 looper letters, 102 selfloop transitions, 2 changer transitions 0/188 dead transitions. [2024-10-11 19:47:55,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 188 transitions, 685 flow [2024-10-11 19:47:55,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 19:47:55,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 19:47:55,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 354 transitions. [2024-10-11 19:47:55,416 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6020408163265306 [2024-10-11 19:47:55,416 INFO L175 Difference]: Start difference. First operand has 177 places, 165 transitions, 431 flow. Second operand 3 states and 354 transitions. [2024-10-11 19:47:55,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 188 transitions, 685 flow [2024-10-11 19:47:55,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 188 transitions, 637 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-10-11 19:47:55,422 INFO L231 Difference]: Finished difference. Result has 175 places, 165 transitions, 393 flow [2024-10-11 19:47:55,423 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} [2024-10-11 19:47:55,424 INFO L277 CegarLoopForPetriNet]: 156 programPoint places, 19 predicate places. [2024-10-11 19:47:55,425 INFO L471 AbstractCegarLoop]: Abstraction has has 175 places, 165 transitions, 393 flow [2024-10-11 19:47:55,425 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) [2024-10-11 19:47:55,425 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:47:55,426 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1] [2024-10-11 19:47:55,426 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-11 19:47:55,426 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)] === [2024-10-11 19:47:55,426 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:47:55,426 INFO L85 PathProgramCache]: Analyzing trace with hash -45324805, now seen corresponding path program 1 times [2024-10-11 19:47:55,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:47:55,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660388803] [2024-10-11 19:47:55,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:47:55,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:47:55,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:47:55,570 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-10-11 19:47:55,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:47:55,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660388803] [2024-10-11 19:47:55,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660388803] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 19:47:55,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408755187] [2024-10-11 19:47:55,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:47:55,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:47:55,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 19:47:55,574 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 19:47:55,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-11 19:47:55,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:47:55,647 INFO L255 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-11 19:47:55,649 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:47:55,688 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 [2024-10-11 19:47:55,744 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-10-11 19:47:55,745 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:47:55,809 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-10-11 19:47:55,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408755187] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:47:55,811 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 19:47:55,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2024-10-11 19:47:55,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690852636] [2024-10-11 19:47:55,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 19:47:55,812 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-11 19:47:55,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:47:55,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-11 19:47:55,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-10-11 19:47:56,015 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 196 [2024-10-11 19:47:56,016 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) [2024-10-11 19:47:56,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:47:56,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 196 [2024-10-11 19:47:56,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:47:56,125 INFO L124 PetriNetUnfolderBase]: 72/276 cut-off events. [2024-10-11 19:47:56,125 INFO L125 PetriNetUnfolderBase]: For 122/122 co-relation queries the response was YES. [2024-10-11 19:47:56,126 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. [2024-10-11 19:47:56,128 INFO L140 encePairwiseOnDemand]: 192/196 looper letters, 61 selfloop transitions, 2 changer transitions 0/90 dead transitions. [2024-10-11 19:47:56,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 90 transitions, 362 flow [2024-10-11 19:47:56,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 19:47:56,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-11 19:47:56,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 395 transitions. [2024-10-11 19:47:56,130 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5038265306122449 [2024-10-11 19:47:56,130 INFO L175 Difference]: Start difference. First operand has 175 places, 165 transitions, 393 flow. Second operand 4 states and 395 transitions. [2024-10-11 19:47:56,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 90 transitions, 362 flow [2024-10-11 19:47:56,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 90 transitions, 356 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-11 19:47:56,132 INFO L231 Difference]: Finished difference. Result has 80 places, 66 transitions, 186 flow [2024-10-11 19:47:56,132 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} [2024-10-11 19:47:56,133 INFO L277 CegarLoopForPetriNet]: 156 programPoint places, -76 predicate places. [2024-10-11 19:47:56,133 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 66 transitions, 186 flow [2024-10-11 19:47:56,134 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) [2024-10-11 19:47:56,134 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:47:56,134 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 2, 2, 1, 1, 1, 1, 1] [2024-10-11 19:47:56,147 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-11 19:47:56,334 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:47:56,335 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)] === [2024-10-11 19:47:56,335 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:47:56,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1405068054, now seen corresponding path program 1 times [2024-10-11 19:47:56,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:47:56,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19366777] [2024-10-11 19:47:56,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:47:56,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:47:56,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-11 19:47:56,364 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-11 19:47:56,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-11 19:47:56,395 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-11 19:47:56,395 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-11 19:47:56,396 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (49 of 50 remaining) [2024-10-11 19:47:56,397 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 50 remaining) [2024-10-11 19:47:56,398 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 50 remaining) [2024-10-11 19:47:56,398 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 50 remaining) [2024-10-11 19:47:56,398 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 50 remaining) [2024-10-11 19:47:56,398 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_LEAK (44 of 50 remaining) [2024-10-11 19:47:56,398 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 50 remaining) [2024-10-11 19:47:56,398 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 50 remaining) [2024-10-11 19:47:56,398 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 50 remaining) [2024-10-11 19:47:56,398 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 50 remaining) [2024-10-11 19:47:56,398 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 50 remaining) [2024-10-11 19:47:56,398 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 50 remaining) [2024-10-11 19:47:56,399 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 50 remaining) [2024-10-11 19:47:56,399 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 50 remaining) [2024-10-11 19:47:56,399 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 50 remaining) [2024-10-11 19:47:56,399 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 50 remaining) [2024-10-11 19:47:56,399 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 50 remaining) [2024-10-11 19:47:56,399 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 50 remaining) [2024-10-11 19:47:56,399 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 50 remaining) [2024-10-11 19:47:56,399 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 50 remaining) [2024-10-11 19:47:56,399 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_LEAK (29 of 50 remaining) [2024-10-11 19:47:56,399 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 50 remaining) [2024-10-11 19:47:56,399 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 50 remaining) [2024-10-11 19:47:56,399 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 50 remaining) [2024-10-11 19:47:56,400 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 50 remaining) [2024-10-11 19:47:56,400 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 50 remaining) [2024-10-11 19:47:56,400 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 50 remaining) [2024-10-11 19:47:56,400 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK (22 of 50 remaining) [2024-10-11 19:47:56,400 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 50 remaining) [2024-10-11 19:47:56,400 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 50 remaining) [2024-10-11 19:47:56,400 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 50 remaining) [2024-10-11 19:47:56,400 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 50 remaining) [2024-10-11 19:47:56,400 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 50 remaining) [2024-10-11 19:47:56,400 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 50 remaining) [2024-10-11 19:47:56,400 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 50 remaining) [2024-10-11 19:47:56,401 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 50 remaining) [2024-10-11 19:47:56,401 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 50 remaining) [2024-10-11 19:47:56,401 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 50 remaining) [2024-10-11 19:47:56,401 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (11 of 50 remaining) [2024-10-11 19:47:56,401 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 50 remaining) [2024-10-11 19:47:56,401 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 50 remaining) [2024-10-11 19:47:56,401 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 50 remaining) [2024-10-11 19:47:56,401 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 50 remaining) [2024-10-11 19:47:56,401 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 50 remaining) [2024-10-11 19:47:56,401 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 50 remaining) [2024-10-11 19:47:56,401 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 50 remaining) [2024-10-11 19:47:56,401 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 50 remaining) [2024-10-11 19:47:56,402 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 50 remaining) [2024-10-11 19:47:56,402 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 50 remaining) [2024-10-11 19:47:56,402 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (0 of 50 remaining) [2024-10-11 19:47:56,402 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-10-11 19:47:56,403 INFO L407 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1] [2024-10-11 19:47:56,405 WARN L239 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-11 19:47:56,405 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-10-11 19:47:56,437 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-10-11 19:47:56,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 206 places, 259 transitions, 534 flow [2024-10-11 19:47:56,476 INFO L124 PetriNetUnfolderBase]: 113/525 cut-off events. [2024-10-11 19:47:56,477 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-10-11 19:47:56,481 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. [2024-10-11 19:47:56,481 INFO L82 GeneralOperation]: Start removeDead. Operand has 206 places, 259 transitions, 534 flow [2024-10-11 19:47:56,489 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 206 places, 259 transitions, 534 flow [2024-10-11 19:47:56,490 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 19:47:56,491 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;@32135b25, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 19:47:56,491 INFO L334 AbstractCegarLoop]: Starting to check reachability of 61 error locations. [2024-10-11 19:47:56,493 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-11 19:47:56,493 INFO L124 PetriNetUnfolderBase]: 1/6 cut-off events. [2024-10-11 19:47:56,493 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-11 19:47:56,494 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:47:56,494 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-10-11 19:47:56,494 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)] === [2024-10-11 19:47:56,494 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:47:56,494 INFO L85 PathProgramCache]: Analyzing trace with hash 31795730, now seen corresponding path program 1 times [2024-10-11 19:47:56,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:47:56,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838004311] [2024-10-11 19:47:56,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:47:56,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:47:56,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:47:56,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:47:56,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:47:56,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838004311] [2024-10-11 19:47:56,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838004311] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:47:56,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:47:56,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 19:47:56,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696929798] [2024-10-11 19:47:56,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:47:56,519 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 19:47:56,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:47:56,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 19:47:56,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 19:47:56,521 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 259 [2024-10-11 19:47:56,521 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) [2024-10-11 19:47:56,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:47:56,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 259 [2024-10-11 19:47:56,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:48:02,735 INFO L124 PetriNetUnfolderBase]: 44674/99599 cut-off events. [2024-10-11 19:48:02,735 INFO L125 PetriNetUnfolderBase]: For 282/282 co-relation queries the response was YES. [2024-10-11 19:48:02,883 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. [2024-10-11 19:48:03,265 INFO L140 encePairwiseOnDemand]: 208/259 looper letters, 93 selfloop transitions, 2 changer transitions 0/208 dead transitions. [2024-10-11 19:48:03,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 208 transitions, 622 flow [2024-10-11 19:48:03,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 19:48:03,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 19:48:03,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 483 transitions. [2024-10-11 19:48:03,266 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6216216216216216 [2024-10-11 19:48:03,267 INFO L175 Difference]: Start difference. First operand has 206 places, 259 transitions, 534 flow. Second operand 3 states and 483 transitions. [2024-10-11 19:48:03,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 208 transitions, 622 flow [2024-10-11 19:48:03,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 208 transitions, 622 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-11 19:48:03,271 INFO L231 Difference]: Finished difference. Result has 205 places, 208 transitions, 442 flow [2024-10-11 19:48:03,272 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} [2024-10-11 19:48:03,272 INFO L277 CegarLoopForPetriNet]: 206 programPoint places, -1 predicate places. [2024-10-11 19:48:03,273 INFO L471 AbstractCegarLoop]: Abstraction has has 205 places, 208 transitions, 442 flow [2024-10-11 19:48:03,273 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) [2024-10-11 19:48:03,273 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:48:03,273 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-10-11 19:48:03,273 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-10-11 19:48:03,273 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)] === [2024-10-11 19:48:03,274 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:48:03,274 INFO L85 PathProgramCache]: Analyzing trace with hash 985673759, now seen corresponding path program 1 times [2024-10-11 19:48:03,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:48:03,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123938833] [2024-10-11 19:48:03,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:48:03,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:48:03,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:48:03,297 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:48:03,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:48:03,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123938833] [2024-10-11 19:48:03,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123938833] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 19:48:03,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269982615] [2024-10-11 19:48:03,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:48:03,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:48:03,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 19:48:03,299 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 19:48:03,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-11 19:48:03,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:48:03,363 INFO L255 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-11 19:48:03,364 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:48:03,371 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:48:03,371 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:48:03,382 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:48:03,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269982615] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:48:03,382 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 19:48:03,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-10-11 19:48:03,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343687165] [2024-10-11 19:48:03,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 19:48:03,383 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-11 19:48:03,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:48:03,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-11 19:48:03,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-10-11 19:48:03,385 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 259 [2024-10-11 19:48:03,385 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) [2024-10-11 19:48:03,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:48:03,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 259 [2024-10-11 19:48:03,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:48:09,767 INFO L124 PetriNetUnfolderBase]: 44674/99602 cut-off events. [2024-10-11 19:48:09,767 INFO L125 PetriNetUnfolderBase]: For 282/282 co-relation queries the response was YES. [2024-10-11 19:48:10,001 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. [2024-10-11 19:48:10,577 INFO L140 encePairwiseOnDemand]: 256/259 looper letters, 93 selfloop transitions, 5 changer transitions 0/211 dead transitions. [2024-10-11 19:48:10,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 211 transitions, 650 flow [2024-10-11 19:48:10,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-11 19:48:10,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-11 19:48:10,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 779 transitions. [2024-10-11 19:48:10,579 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5012870012870013 [2024-10-11 19:48:10,580 INFO L175 Difference]: Start difference. First operand has 205 places, 208 transitions, 442 flow. Second operand 6 states and 779 transitions. [2024-10-11 19:48:10,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 211 transitions, 650 flow [2024-10-11 19:48:10,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 211 transitions, 646 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-11 19:48:10,583 INFO L231 Difference]: Finished difference. Result has 212 places, 211 transitions, 474 flow [2024-10-11 19:48:10,584 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} [2024-10-11 19:48:10,584 INFO L277 CegarLoopForPetriNet]: 206 programPoint places, 6 predicate places. [2024-10-11 19:48:10,584 INFO L471 AbstractCegarLoop]: Abstraction has has 212 places, 211 transitions, 474 flow [2024-10-11 19:48:10,585 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) [2024-10-11 19:48:10,585 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:48:10,585 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2024-10-11 19:48:10,599 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-11 19:48:10,789 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-10-11 19:48:10,790 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)] === [2024-10-11 19:48:10,790 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:48:10,790 INFO L85 PathProgramCache]: Analyzing trace with hash -478362286, now seen corresponding path program 2 times [2024-10-11 19:48:10,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:48:10,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153210010] [2024-10-11 19:48:10,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:48:10,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:48:10,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:48:10,814 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-11 19:48:10,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:48:10,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153210010] [2024-10-11 19:48:10,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153210010] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:48:10,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:48:10,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 19:48:10,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232007285] [2024-10-11 19:48:10,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:48:10,815 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 19:48:10,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:48:10,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 19:48:10,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 19:48:10,849 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 259 [2024-10-11 19:48:10,850 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) [2024-10-11 19:48:10,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:48:10,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 259 [2024-10-11 19:48:10,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:48:17,449 INFO L124 PetriNetUnfolderBase]: 47090/103142 cut-off events. [2024-10-11 19:48:17,449 INFO L125 PetriNetUnfolderBase]: For 166/166 co-relation queries the response was YES. [2024-10-11 19:48:17,664 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. [2024-10-11 19:48:17,964 INFO L140 encePairwiseOnDemand]: 255/259 looper letters, 142 selfloop transitions, 2 changer transitions 0/253 dead transitions. [2024-10-11 19:48:17,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 253 transitions, 846 flow [2024-10-11 19:48:17,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 19:48:17,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 19:48:17,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 469 transitions. [2024-10-11 19:48:17,966 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6036036036036037 [2024-10-11 19:48:17,966 INFO L175 Difference]: Start difference. First operand has 212 places, 211 transitions, 474 flow. Second operand 3 states and 469 transitions. [2024-10-11 19:48:17,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 253 transitions, 846 flow [2024-10-11 19:48:17,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 253 transitions, 832 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-10-11 19:48:17,970 INFO L231 Difference]: Finished difference. Result has 211 places, 209 transitions, 460 flow [2024-10-11 19:48:17,970 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} [2024-10-11 19:48:17,970 INFO L277 CegarLoopForPetriNet]: 206 programPoint places, 5 predicate places. [2024-10-11 19:48:17,971 INFO L471 AbstractCegarLoop]: Abstraction has has 211 places, 209 transitions, 460 flow [2024-10-11 19:48:17,971 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) [2024-10-11 19:48:17,971 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:48:17,971 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2024-10-11 19:48:17,971 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-10-11 19:48:17,971 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)] === [2024-10-11 19:48:17,971 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:48:17,971 INFO L85 PathProgramCache]: Analyzing trace with hash -478362285, now seen corresponding path program 1 times [2024-10-11 19:48:17,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:48:17,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61106113] [2024-10-11 19:48:17,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:48:17,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:48:17,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:48:18,015 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:48:18,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:48:18,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61106113] [2024-10-11 19:48:18,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61106113] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 19:48:18,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67448184] [2024-10-11 19:48:18,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:48:18,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:48:18,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 19:48:18,017 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 19:48:18,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-11 19:48:18,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:48:18,082 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-11 19:48:18,083 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:48:18,358 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:48:18,358 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:48:18,404 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:48:18,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67448184] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:48:18,405 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 19:48:18,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-10-11 19:48:18,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556389207] [2024-10-11 19:48:18,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 19:48:18,407 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-11 19:48:18,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:48:18,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-11 19:48:18,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-10-11 19:48:18,409 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 259 [2024-10-11 19:48:18,410 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) [2024-10-11 19:48:18,413 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:48:18,413 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 259 [2024-10-11 19:48:18,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:48:25,167 INFO L124 PetriNetUnfolderBase]: 44674/99280 cut-off events. [2024-10-11 19:48:25,167 INFO L125 PetriNetUnfolderBase]: For 1253/1253 co-relation queries the response was YES. [2024-10-11 19:48:25,421 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. [2024-10-11 19:48:25,740 INFO L140 encePairwiseOnDemand]: 256/259 looper letters, 93 selfloop transitions, 11 changer transitions 0/215 dead transitions. [2024-10-11 19:48:25,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 215 transitions, 704 flow [2024-10-11 19:48:25,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-11 19:48:25,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-10-11 19:48:25,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1466 transitions. [2024-10-11 19:48:25,743 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4716859716859717 [2024-10-11 19:48:25,743 INFO L175 Difference]: Start difference. First operand has 211 places, 209 transitions, 460 flow. Second operand 12 states and 1466 transitions. [2024-10-11 19:48:25,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 215 transitions, 704 flow [2024-10-11 19:48:25,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 215 transitions, 700 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-11 19:48:25,793 INFO L231 Difference]: Finished difference. Result has 226 places, 215 transitions, 540 flow [2024-10-11 19:48:25,794 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} [2024-10-11 19:48:25,794 INFO L277 CegarLoopForPetriNet]: 206 programPoint places, 20 predicate places. [2024-10-11 19:48:25,794 INFO L471 AbstractCegarLoop]: Abstraction has has 226 places, 215 transitions, 540 flow [2024-10-11 19:48:25,795 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) [2024-10-11 19:48:25,795 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:48:25,795 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1] [2024-10-11 19:48:25,808 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-11 19:48:25,995 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-10-11 19:48:25,996 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)] === [2024-10-11 19:48:25,996 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:48:25,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1423318477, now seen corresponding path program 2 times [2024-10-11 19:48:25,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:48:25,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072018179] [2024-10-11 19:48:25,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:48:25,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:48:26,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:48:26,061 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-10-11 19:48:26,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:48:26,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072018179] [2024-10-11 19:48:26,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072018179] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:48:26,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:48:26,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 19:48:26,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736964554] [2024-10-11 19:48:26,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:48:26,063 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 19:48:26,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:48:26,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 19:48:26,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 19:48:26,096 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 259 [2024-10-11 19:48:26,097 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) [2024-10-11 19:48:26,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:48:26,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 259 [2024-10-11 19:48:26,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand