./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/pthread-wmm/safe019_power.opt.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 3289d67d Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/pthread-wmm/safe019_power.opt.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 57c8b47d74ada5c94291d16aafebbb644062493fff61510a323122bcd88ba5b1 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-3289d67-m [2024-11-17 03:21:22,174 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-17 03:21:22,246 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-17 03:21:22,250 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-17 03:21:22,252 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-17 03:21:22,280 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-17 03:21:22,280 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-17 03:21:22,281 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-17 03:21:22,281 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-17 03:21:22,281 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-17 03:21:22,282 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-17 03:21:22,282 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-17 03:21:22,282 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-17 03:21:22,283 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-17 03:21:22,283 INFO L153 SettingsManager]: * Use SBE=true [2024-11-17 03:21:22,290 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-17 03:21:22,290 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-17 03:21:22,291 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-17 03:21:22,291 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-17 03:21:22,291 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-17 03:21:22,291 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-17 03:21:22,292 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-17 03:21:22,292 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-17 03:21:22,293 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-17 03:21:22,293 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-17 03:21:22,293 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-17 03:21:22,293 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-17 03:21:22,294 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-17 03:21:22,294 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-17 03:21:22,294 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-17 03:21:22,294 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-17 03:21:22,295 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-17 03:21:22,295 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-17 03:21:22,295 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-17 03:21:22,295 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-17 03:21:22,296 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-17 03:21:22,296 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-17 03:21:22,296 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-17 03:21:22,296 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-17 03:21:22,296 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-17 03:21:22,297 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-17 03:21:22,297 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-17 03:21:22,297 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 57c8b47d74ada5c94291d16aafebbb644062493fff61510a323122bcd88ba5b1 [2024-11-17 03:21:22,496 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-17 03:21:22,517 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-17 03:21:22,520 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-17 03:21:22,521 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-17 03:21:22,521 INFO L274 PluginConnector]: CDTParser initialized [2024-11-17 03:21:22,522 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-wmm/safe019_power.opt.i [2024-11-17 03:21:23,876 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-17 03:21:24,092 INFO L384 CDTParser]: Found 1 translation units. [2024-11-17 03:21:24,093 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-wmm/safe019_power.opt.i [2024-11-17 03:21:24,110 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/723d6508c/96fc6e87742246daa92deafceaf0274c/FLAGef324f51f [2024-11-17 03:21:24,125 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/723d6508c/96fc6e87742246daa92deafceaf0274c [2024-11-17 03:21:24,127 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-17 03:21:24,128 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-17 03:21:24,129 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-17 03:21:24,129 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-17 03:21:24,133 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-17 03:21:24,134 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:21:24" (1/1) ... [2024-11-17 03:21:24,135 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54090af4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:21:24, skipping insertion in model container [2024-11-17 03:21:24,135 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:21:24" (1/1) ... [2024-11-17 03:21:24,170 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-17 03:21:24,531 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-17 03:21:24,545 INFO L200 MainTranslator]: Completed pre-run [2024-11-17 03:21:24,593 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-17 03:21:24,632 INFO L204 MainTranslator]: Completed translation [2024-11-17 03:21:24,633 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:21:24 WrapperNode [2024-11-17 03:21:24,633 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-17 03:21:24,634 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-17 03:21:24,634 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-17 03:21:24,635 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-17 03:21:24,640 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:21:24" (1/1) ... [2024-11-17 03:21:24,663 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:21:24" (1/1) ... [2024-11-17 03:21:24,692 INFO L138 Inliner]: procedures = 176, calls = 73, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 182 [2024-11-17 03:21:24,692 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-17 03:21:24,693 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-17 03:21:24,693 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-17 03:21:24,693 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-17 03:21:24,712 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:21:24" (1/1) ... [2024-11-17 03:21:24,713 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:21:24" (1/1) ... [2024-11-17 03:21:24,721 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:21:24" (1/1) ... [2024-11-17 03:21:24,751 INFO L175 MemorySlicer]: Split 26 memory accesses to 2 slices as follows [2, 24]. 92 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 8 writes are split as follows [0, 8]. [2024-11-17 03:21:24,755 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:21:24" (1/1) ... [2024-11-17 03:21:24,755 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:21:24" (1/1) ... [2024-11-17 03:21:24,767 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:21:24" (1/1) ... [2024-11-17 03:21:24,772 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:21:24" (1/1) ... [2024-11-17 03:21:24,774 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:21:24" (1/1) ... [2024-11-17 03:21:24,780 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:21:24" (1/1) ... [2024-11-17 03:21:24,789 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-17 03:21:24,790 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-17 03:21:24,790 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-17 03:21:24,790 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-17 03:21:24,791 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:21:24" (1/1) ... [2024-11-17 03:21:24,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-17 03:21:24,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:21:24,827 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-17 03:21:24,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-17 03:21:24,869 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-17 03:21:24,869 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-17 03:21:24,869 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-17 03:21:24,869 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-17 03:21:24,870 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-17 03:21:24,870 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-17 03:21:24,870 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-11-17 03:21:24,870 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-11-17 03:21:24,870 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-11-17 03:21:24,870 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-11-17 03:21:24,871 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-11-17 03:21:24,871 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-11-17 03:21:24,871 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-11-17 03:21:24,871 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-11-17 03:21:24,871 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-17 03:21:24,871 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-17 03:21:24,871 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-17 03:21:24,871 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-17 03:21:24,871 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-17 03:21:24,873 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-17 03:21:25,000 INFO L256 CfgBuilder]: Building ICFG [2024-11-17 03:21:25,001 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-17 03:21:25,416 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-17 03:21:25,416 INFO L307 CfgBuilder]: Performing block encoding [2024-11-17 03:21:26,139 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-17 03:21:26,139 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-17 03:21:26,140 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.11 03:21:26 BoogieIcfgContainer [2024-11-17 03:21:26,140 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-17 03:21:26,141 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-17 03:21:26,141 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-17 03:21:26,148 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-17 03:21:26,148 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 03:21:24" (1/3) ... [2024-11-17 03:21:26,148 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6489350d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:21:26, skipping insertion in model container [2024-11-17 03:21:26,148 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:21:24" (2/3) ... [2024-11-17 03:21:26,149 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6489350d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:21:26, skipping insertion in model container [2024-11-17 03:21:26,149 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.11 03:21:26" (3/3) ... [2024-11-17 03:21:26,149 INFO L112 eAbstractionObserver]: Analyzing ICFG safe019_power.opt.i [2024-11-17 03:21:26,169 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-17 03:21:26,170 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 49 error locations. [2024-11-17 03:21:26,170 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-17 03:21:26,366 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-17 03:21:26,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 108 places, 97 transitions, 210 flow [2024-11-17 03:21:26,429 INFO L124 PetriNetUnfolderBase]: 2/93 cut-off events. [2024-11-17 03:21:26,429 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-17 03:21:26,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106 conditions, 93 events. 2/93 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 375 event pairs, 0 based on Foata normal form. 0/42 useless extension candidates. Maximal degree in co-relation 97. Up to 2 conditions per place. [2024-11-17 03:21:26,437 INFO L82 GeneralOperation]: Start removeDead. Operand has 108 places, 97 transitions, 210 flow [2024-11-17 03:21:26,443 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 104 places, 93 transitions, 198 flow [2024-11-17 03:21:26,453 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-17 03:21:26,463 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;@1136e02f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-17 03:21:26,464 INFO L334 AbstractCegarLoop]: Starting to check reachability of 94 error locations. [2024-11-17 03:21:26,473 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-17 03:21:26,473 INFO L124 PetriNetUnfolderBase]: 0/8 cut-off events. [2024-11-17 03:21:26,473 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-17 03:21:26,474 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:21:26,478 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-11-17 03:21:26,478 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting P0Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 91 more)] === [2024-11-17 03:21:26,482 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:21:26,485 INFO L85 PathProgramCache]: Analyzing trace with hash 924931108, now seen corresponding path program 1 times [2024-11-17 03:21:26,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:21:26,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992104232] [2024-11-17 03:21:26,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:21:26,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:21:26,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:21:26,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:21:26,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:21:26,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992104232] [2024-11-17 03:21:26,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992104232] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:21:26,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:21:26,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-17 03:21:26,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795943300] [2024-11-17 03:21:26,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:21:26,795 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-17 03:21:26,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:21:26,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-17 03:21:26,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-17 03:21:26,823 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 97 [2024-11-17 03:21:26,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 93 transitions, 198 flow. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:21:26,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:21:26,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 97 [2024-11-17 03:21:26,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:21:55,624 INFO L124 PetriNetUnfolderBase]: 171115/235895 cut-off events. [2024-11-17 03:21:55,625 INFO L125 PetriNetUnfolderBase]: For 469/469 co-relation queries the response was YES. [2024-11-17 03:21:56,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 458679 conditions, 235895 events. 171115/235895 cut-off events. For 469/469 co-relation queries the response was YES. Maximal size of possible extension queue 8427. Compared 1768995 event pairs, 171115 based on Foata normal form. 7056/171544 useless extension candidates. Maximal degree in co-relation 458667. Up to 221642 conditions per place. [2024-11-17 03:21:57,156 INFO L140 encePairwiseOnDemand]: 60/97 looper letters, 47 selfloop transitions, 1 changer transitions 0/56 dead transitions. [2024-11-17 03:21:57,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 56 transitions, 220 flow [2024-11-17 03:21:57,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:21:57,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:21:57,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 120 transitions. [2024-11-17 03:21:57,166 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.41237113402061853 [2024-11-17 03:21:57,167 INFO L175 Difference]: Start difference. First operand has 104 places, 93 transitions, 198 flow. Second operand 3 states and 120 transitions. [2024-11-17 03:21:57,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 56 transitions, 220 flow [2024-11-17 03:21:57,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 56 transitions, 216 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-17 03:21:57,195 INFO L231 Difference]: Finished difference. Result has 67 places, 56 transitions, 122 flow [2024-11-17 03:21:57,197 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=122, PETRI_PLACES=67, PETRI_TRANSITIONS=56} [2024-11-17 03:21:57,200 INFO L277 CegarLoopForPetriNet]: 104 programPoint places, -37 predicate places. [2024-11-17 03:21:57,200 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 56 transitions, 122 flow [2024-11-17 03:21:57,200 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:21:57,200 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:21:57,200 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-11-17 03:21:57,201 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-17 03:21:57,201 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting P0Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 91 more)] === [2024-11-17 03:21:57,201 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:21:57,201 INFO L85 PathProgramCache]: Analyzing trace with hash 924931109, now seen corresponding path program 1 times [2024-11-17 03:21:57,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:21:57,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161403322] [2024-11-17 03:21:57,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:21:57,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:21:57,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:21:57,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:21:57,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:21:57,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161403322] [2024-11-17 03:21:57,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161403322] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:21:57,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:21:57,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-17 03:21:57,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310978693] [2024-11-17 03:21:57,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:21:57,305 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-17 03:21:57,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:21:57,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-17 03:21:57,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-17 03:21:57,309 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 97 [2024-11-17 03:21:57,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 56 transitions, 122 flow. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:21:57,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:21:57,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 97 [2024-11-17 03:21:57,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:22:04,039 INFO L124 PetriNetUnfolderBase]: 42899/60758 cut-off events. [2024-11-17 03:22:04,040 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-17 03:22:04,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117656 conditions, 60758 events. 42899/60758 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2113. Compared 413124 event pairs, 42899 based on Foata normal form. 0/56252 useless extension candidates. Maximal degree in co-relation 117650. Up to 56376 conditions per place. [2024-11-17 03:22:04,501 INFO L140 encePairwiseOnDemand]: 86/97 looper letters, 37 selfloop transitions, 1 changer transitions 0/46 dead transitions. [2024-11-17 03:22:04,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 46 transitions, 178 flow [2024-11-17 03:22:04,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:22:04,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:22:04,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 84 transitions. [2024-11-17 03:22:04,505 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.28865979381443296 [2024-11-17 03:22:04,505 INFO L175 Difference]: Start difference. First operand has 67 places, 56 transitions, 122 flow. Second operand 3 states and 84 transitions. [2024-11-17 03:22:04,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 46 transitions, 178 flow [2024-11-17 03:22:04,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 46 transitions, 177 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-17 03:22:04,506 INFO L231 Difference]: Finished difference. Result has 58 places, 46 transitions, 103 flow [2024-11-17 03:22:04,506 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=103, PETRI_PLACES=58, PETRI_TRANSITIONS=46} [2024-11-17 03:22:04,507 INFO L277 CegarLoopForPetriNet]: 104 programPoint places, -46 predicate places. [2024-11-17 03:22:04,507 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 46 transitions, 103 flow [2024-11-17 03:22:04,507 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:22:04,507 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:22:04,507 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-17 03:22:04,507 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-17 03:22:04,508 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting P1Err4ASSERT_VIOLATIONMEMORY_LEAK === [P0Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 91 more)] === [2024-11-17 03:22:04,508 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:22:04,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1393125709, now seen corresponding path program 1 times [2024-11-17 03:22:04,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:22:04,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564246326] [2024-11-17 03:22:04,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:22:04,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:22:04,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:22:04,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:22:04,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:22:04,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564246326] [2024-11-17 03:22:04,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564246326] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:22:04,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:22:04,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-17 03:22:04,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431066502] [2024-11-17 03:22:04,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:22:04,751 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-17 03:22:04,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:22:04,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-17 03:22:04,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-17 03:22:04,751 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 97 [2024-11-17 03:22:04,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 46 transitions, 103 flow. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 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) [2024-11-17 03:22:04,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:22:04,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 97 [2024-11-17 03:22:04,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand