./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/chl-nzb-file-subst.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 8fc3dc66 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/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_1.6.800.v20240513-1750.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/weaver/chl-nzb-file-subst.wvr.c -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 47976145f2a7f206dd7d2e7a0ffeac879f94f33f7a5b87161ebd997173567eb0 --- Real Ultimate output --- This is Ultimate 0.3.0-?-8fc3dc6-m [2025-03-17 14:23:35,025 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-17 14:23:35,083 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-03-17 14:23:35,087 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-17 14:23:35,087 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-17 14:23:35,106 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-17 14:23:35,106 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-17 14:23:35,106 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-17 14:23:35,107 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-17 14:23:35,107 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-17 14:23:35,107 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-17 14:23:35,107 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-17 14:23:35,107 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-17 14:23:35,107 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-17 14:23:35,107 INFO L153 SettingsManager]: * Use SBE=true [2025-03-17 14:23:35,107 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-17 14:23:35,108 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-17 14:23:35,108 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-17 14:23:35,108 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-17 14:23:35,108 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-17 14:23:35,108 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-03-17 14:23:35,108 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-03-17 14:23:35,108 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-03-17 14:23:35,108 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-17 14:23:35,108 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-03-17 14:23:35,108 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-03-17 14:23:35,108 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-17 14:23:35,108 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-17 14:23:35,109 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-17 14:23:35,109 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-17 14:23:35,109 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-17 14:23:35,109 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-17 14:23:35,109 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-17 14:23:35,109 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 14:23:35,109 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-17 14:23:35,109 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-17 14:23:35,110 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-17 14:23:35,110 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-17 14:23:35,110 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-17 14:23:35,110 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-17 14:23:35,110 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-17 14:23:35,110 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-17 14:23:35,110 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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 -> 47976145f2a7f206dd7d2e7a0ffeac879f94f33f7a5b87161ebd997173567eb0 [2025-03-17 14:23:35,385 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-17 14:23:35,394 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-17 14:23:35,396 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-17 14:23:35,397 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-17 14:23:35,397 INFO L274 PluginConnector]: CDTParser initialized [2025-03-17 14:23:35,398 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/chl-nzb-file-subst.wvr.c [2025-03-17 14:23:36,476 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad89ed27b/4c36b14a270a4a489d39961af93be7ed/FLAGd82f3936e [2025-03-17 14:23:36,770 INFO L384 CDTParser]: Found 1 translation units. [2025-03-17 14:23:36,775 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-nzb-file-subst.wvr.c [2025-03-17 14:23:36,783 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad89ed27b/4c36b14a270a4a489d39961af93be7ed/FLAGd82f3936e [2025-03-17 14:23:37,052 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad89ed27b/4c36b14a270a4a489d39961af93be7ed [2025-03-17 14:23:37,054 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-17 14:23:37,056 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-17 14:23:37,057 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-17 14:23:37,058 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-17 14:23:37,061 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-17 14:23:37,062 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 02:23:37" (1/1) ... [2025-03-17 14:23:37,062 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1478a754 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:23:37, skipping insertion in model container [2025-03-17 14:23:37,062 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 02:23:37" (1/1) ... [2025-03-17 14:23:37,084 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-17 14:23:37,240 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-03-17 14:23:37,242 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 14:23:37,248 INFO L200 MainTranslator]: Completed pre-run [2025-03-17 14:23:37,294 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 14:23:37,312 INFO L204 MainTranslator]: Completed translation [2025-03-17 14:23:37,313 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:23:37 WrapperNode [2025-03-17 14:23:37,313 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-17 14:23:37,314 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-17 14:23:37,314 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-17 14:23:37,314 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-17 14:23:37,319 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:23:37" (1/1) ... [2025-03-17 14:23:37,330 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:23:37" (1/1) ... [2025-03-17 14:23:37,376 INFO L138 Inliner]: procedures = 25, calls = 62, calls flagged for inlining = 29, calls inlined = 43, statements flattened = 593 [2025-03-17 14:23:37,380 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-17 14:23:37,380 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-17 14:23:37,381 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-17 14:23:37,381 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-17 14:23:37,390 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:23:37" (1/1) ... [2025-03-17 14:23:37,391 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:23:37" (1/1) ... [2025-03-17 14:23:37,399 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:23:37" (1/1) ... [2025-03-17 14:23:37,425 INFO L175 MemorySlicer]: Split 29 memory accesses to 2 slices as follows [2, 27]. 93 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2025-03-17 14:23:37,428 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:23:37" (1/1) ... [2025-03-17 14:23:37,429 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:23:37" (1/1) ... [2025-03-17 14:23:37,446 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:23:37" (1/1) ... [2025-03-17 14:23:37,452 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:23:37" (1/1) ... [2025-03-17 14:23:37,454 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:23:37" (1/1) ... [2025-03-17 14:23:37,459 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:23:37" (1/1) ... [2025-03-17 14:23:37,462 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-17 14:23:37,468 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-17 14:23:37,468 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-17 14:23:37,468 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-17 14:23:37,469 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:23:37" (1/1) ... [2025-03-17 14:23:37,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 14:23:37,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:23:37,494 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) [2025-03-17 14:23:37,500 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 [2025-03-17 14:23:37,514 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-17 14:23:37,514 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-03-17 14:23:37,514 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-03-17 14:23:37,514 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-03-17 14:23:37,514 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-03-17 14:23:37,514 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2025-03-17 14:23:37,515 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2025-03-17 14:23:37,515 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-17 14:23:37,515 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-17 14:23:37,515 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-17 14:23:37,515 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-17 14:23:37,515 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-03-17 14:23:37,515 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-17 14:23:37,515 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-17 14:23:37,515 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-17 14:23:37,515 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-17 14:23:37,516 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-03-17 14:23:37,613 INFO L256 CfgBuilder]: Building ICFG [2025-03-17 14:23:37,614 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-17 14:23:38,279 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-17 14:23:38,279 INFO L307 CfgBuilder]: Performing block encoding [2025-03-17 14:23:38,714 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-17 14:23:38,715 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-17 14:23:38,716 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 02:23:38 BoogieIcfgContainer [2025-03-17 14:23:38,716 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-17 14:23:38,717 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-17 14:23:38,718 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-17 14:23:38,721 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-17 14:23:38,721 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 02:23:37" (1/3) ... [2025-03-17 14:23:38,721 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@df9d994 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 02:23:38, skipping insertion in model container [2025-03-17 14:23:38,721 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:23:37" (2/3) ... [2025-03-17 14:23:38,721 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@df9d994 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 02:23:38, skipping insertion in model container [2025-03-17 14:23:38,722 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 02:23:38" (3/3) ... [2025-03-17 14:23:38,722 INFO L128 eAbstractionObserver]: Analyzing ICFG chl-nzb-file-subst.wvr.c [2025-03-17 14:23:38,734 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-17 14:23:38,735 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG chl-nzb-file-subst.wvr.c that has 4 procedures, 157 locations, 1 initial locations, 6 loop locations, and 56 error locations. [2025-03-17 14:23:38,735 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-17 14:23:38,837 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2025-03-17 14:23:38,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 166 places, 186 transitions, 393 flow [2025-03-17 14:23:38,927 INFO L124 PetriNetUnfolderBase]: 30/183 cut-off events. [2025-03-17 14:23:38,929 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-03-17 14:23:38,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 196 conditions, 183 events. 30/183 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 708 event pairs, 0 based on Foata normal form. 0/97 useless extension candidates. Maximal degree in co-relation 162. Up to 2 conditions per place. [2025-03-17 14:23:38,940 INFO L82 GeneralOperation]: Start removeDead. Operand has 166 places, 186 transitions, 393 flow [2025-03-17 14:23:38,946 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 162 places, 182 transitions, 382 flow [2025-03-17 14:23:38,953 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-17 14:23:38,964 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;@57d5cf0e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-17 14:23:38,966 INFO L334 AbstractCegarLoop]: Starting to check reachability of 107 error locations. [2025-03-17 14:23:38,970 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-17 14:23:38,970 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2025-03-17 14:23:38,971 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-03-17 14:23:38,971 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:23:38,971 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-03-17 14:23:38,972 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 104 more)] === [2025-03-17 14:23:38,975 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:23:38,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1694786, now seen corresponding path program 1 times [2025-03-17 14:23:38,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:23:38,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927247141] [2025-03-17 14:23:38,983 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:23:38,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:23:39,038 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-03-17 14:23:39,069 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-03-17 14:23:39,069 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:23:39,069 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:39,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:23:39,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:23:39,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927247141] [2025-03-17 14:23:39,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927247141] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:23:39,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:23:39,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-03-17 14:23:39,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532134302] [2025-03-17 14:23:39,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:23:39,236 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-17 14:23:39,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:23:39,254 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-17 14:23:39,255 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 14:23:39,328 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 186 [2025-03-17 14:23:39,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 182 transitions, 382 flow. Second operand has 3 states, 3 states have (on average 93.0) internal successors, (279), 3 states have internal predecessors, (279), 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) [2025-03-17 14:23:39,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:23:39,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 186 [2025-03-17 14:23:39,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:23:44,675 INFO L124 PetriNetUnfolderBase]: 49598/89287 cut-off events. [2025-03-17 14:23:44,675 INFO L125 PetriNetUnfolderBase]: For 1212/1212 co-relation queries the response was YES. [2025-03-17 14:23:44,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153712 conditions, 89287 events. 49598/89287 cut-off events. For 1212/1212 co-relation queries the response was YES. Maximal size of possible extension queue 2268. Compared 850552 event pairs, 29352 based on Foata normal form. 1/71865 useless extension candidates. Maximal degree in co-relation 150410. Up to 63479 conditions per place. [2025-03-17 14:23:45,148 INFO L140 encePairwiseOnDemand]: 177/186 looper letters, 84 selfloop transitions, 2 changer transitions 0/174 dead transitions. [2025-03-17 14:23:45,148 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 174 transitions, 538 flow [2025-03-17 14:23:45,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 14:23:45,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-17 14:23:45,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 369 transitions. [2025-03-17 14:23:45,162 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6612903225806451 [2025-03-17 14:23:45,164 INFO L175 Difference]: Start difference. First operand has 162 places, 182 transitions, 382 flow. Second operand 3 states and 369 transitions. [2025-03-17 14:23:45,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 174 transitions, 538 flow [2025-03-17 14:23:45,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 174 transitions, 526 flow, removed 0 selfloop flow, removed 6 redundant places. [2025-03-17 14:23:45,183 INFO L231 Difference]: Finished difference. Result has 153 places, 174 transitions, 358 flow [2025-03-17 14:23:45,185 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=354, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=358, PETRI_PLACES=153, PETRI_TRANSITIONS=174} [2025-03-17 14:23:45,188 INFO L279 CegarLoopForPetriNet]: 162 programPoint places, -9 predicate places. [2025-03-17 14:23:45,188 INFO L471 AbstractCegarLoop]: Abstraction has has 153 places, 174 transitions, 358 flow [2025-03-17 14:23:45,189 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 93.0) internal successors, (279), 3 states have internal predecessors, (279), 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) [2025-03-17 14:23:45,189 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:23:45,189 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-03-17 14:23:45,189 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-17 14:23:45,189 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 104 more)] === [2025-03-17 14:23:45,190 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:23:45,190 INFO L85 PathProgramCache]: Analyzing trace with hash 1694787, now seen corresponding path program 1 times [2025-03-17 14:23:45,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:23:45,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984765307] [2025-03-17 14:23:45,190 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:23:45,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:23:45,201 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-03-17 14:23:45,242 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-03-17 14:23:45,242 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:23:45,242 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:45,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:23:45,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:23:45,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984765307] [2025-03-17 14:23:45,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984765307] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:23:45,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:23:45,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-17 14:23:45,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969892046] [2025-03-17 14:23:45,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:23:45,458 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 14:23:45,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:23:45,458 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 14:23:45,458 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-17 14:23:45,553 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 186 [2025-03-17 14:23:45,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 174 transitions, 358 flow. Second operand has 4 states, 4 states have (on average 92.75) internal successors, (371), 4 states have internal predecessors, (371), 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) [2025-03-17 14:23:45,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:23:45,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 186 [2025-03-17 14:23:45,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:23:50,304 INFO L124 PetriNetUnfolderBase]: 49601/89296 cut-off events. [2025-03-17 14:23:50,304 INFO L125 PetriNetUnfolderBase]: For 298/298 co-relation queries the response was YES. [2025-03-17 14:23:50,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153112 conditions, 89296 events. 49601/89296 cut-off events. For 298/298 co-relation queries the response was YES. Maximal size of possible extension queue 2268. Compared 850603 event pairs, 29352 based on Foata normal form. 0/71869 useless extension candidates. Maximal degree in co-relation 153062. Up to 63492 conditions per place. [2025-03-17 14:23:50,700 INFO L140 encePairwiseOnDemand]: 176/186 looper letters, 91 selfloop transitions, 7 changer transitions 0/183 dead transitions. [2025-03-17 14:23:50,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 183 transitions, 574 flow [2025-03-17 14:23:50,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 14:23:50,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-17 14:23:50,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 377 transitions. [2025-03-17 14:23:50,705 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6756272401433692 [2025-03-17 14:23:50,705 INFO L175 Difference]: Start difference. First operand has 153 places, 174 transitions, 358 flow. Second operand 3 states and 377 transitions. [2025-03-17 14:23:50,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 183 transitions, 574 flow [2025-03-17 14:23:50,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 183 transitions, 568 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-17 14:23:50,711 INFO L231 Difference]: Finished difference. Result has 155 places, 180 transitions, 412 flow [2025-03-17 14:23:50,713 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=354, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=412, PETRI_PLACES=155, PETRI_TRANSITIONS=180} [2025-03-17 14:23:50,714 INFO L279 CegarLoopForPetriNet]: 162 programPoint places, -7 predicate places. [2025-03-17 14:23:50,714 INFO L471 AbstractCegarLoop]: Abstraction has has 155 places, 180 transitions, 412 flow [2025-03-17 14:23:50,715 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 92.75) internal successors, (371), 4 states have internal predecessors, (371), 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) [2025-03-17 14:23:50,715 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:23:50,715 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2025-03-17 14:23:50,715 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-17 14:23:50,715 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 104 more)] === [2025-03-17 14:23:50,716 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:23:50,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1628739862, now seen corresponding path program 1 times [2025-03-17 14:23:50,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:23:50,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111932450] [2025-03-17 14:23:50,717 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:23:50,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:23:50,728 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-03-17 14:23:50,748 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-03-17 14:23:50,749 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:23:50,751 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:50,964 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:23:50,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:23:50,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111932450] [2025-03-17 14:23:50,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111932450] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:23:50,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249327882] [2025-03-17 14:23:50,965 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:23:50,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:23:50,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:23:50,968 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:23:50,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-17 14:23:51,040 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-03-17 14:23:51,054 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-03-17 14:23:51,054 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:23:51,054 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:51,056 INFO L256 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-17 14:23:51,059 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:23:51,089 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 6 treesize of output 5 [2025-03-17 14:23:51,128 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:23:51,128 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:23:51,162 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:23:51,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249327882] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:23:51,163 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:23:51,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2025-03-17 14:23:51,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463454125] [2025-03-17 14:23:51,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:23:51,163 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-17 14:23:51,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:23:51,163 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-17 14:23:51,164 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2025-03-17 14:23:51,445 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 186 [2025-03-17 14:23:51,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 180 transitions, 412 flow. Second operand has 9 states, 9 states have (on average 93.66666666666667) internal successors, (843), 9 states have internal predecessors, (843), 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) [2025-03-17 14:23:51,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:23:51,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 186 [2025-03-17 14:23:51,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:23:56,784 INFO L124 PetriNetUnfolderBase]: 49604/89317 cut-off events. [2025-03-17 14:23:56,784 INFO L125 PetriNetUnfolderBase]: For 301/301 co-relation queries the response was YES. [2025-03-17 14:23:56,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153190 conditions, 89317 events. 49604/89317 cut-off events. For 301/301 co-relation queries the response was YES. Maximal size of possible extension queue 2268. Compared 850610 event pairs, 29352 based on Foata normal form. 6/71900 useless extension candidates. Maximal degree in co-relation 153094. Up to 63493 conditions per place. [2025-03-17 14:23:57,199 INFO L140 encePairwiseOnDemand]: 176/186 looper letters, 98 selfloop transitions, 21 changer transitions 0/204 dead transitions. [2025-03-17 14:23:57,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 204 transitions, 728 flow [2025-03-17 14:23:57,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-17 14:23:57,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-17 14:23:57,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 686 transitions. [2025-03-17 14:23:57,202 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6146953405017921 [2025-03-17 14:23:57,202 INFO L175 Difference]: Start difference. First operand has 155 places, 180 transitions, 412 flow. Second operand 6 states and 686 transitions. [2025-03-17 14:23:57,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 204 transitions, 728 flow [2025-03-17 14:23:57,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 204 transitions, 708 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-17 14:23:57,205 INFO L231 Difference]: Finished difference. Result has 161 places, 192 transitions, 538 flow [2025-03-17 14:23:57,205 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=386, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=538, PETRI_PLACES=161, PETRI_TRANSITIONS=192} [2025-03-17 14:23:57,206 INFO L279 CegarLoopForPetriNet]: 162 programPoint places, -1 predicate places. [2025-03-17 14:23:57,206 INFO L471 AbstractCegarLoop]: Abstraction has has 161 places, 192 transitions, 538 flow [2025-03-17 14:23:57,207 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 93.66666666666667) internal successors, (843), 9 states have internal predecessors, (843), 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) [2025-03-17 14:23:57,207 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:23:57,207 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2025-03-17 14:23:57,215 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-17 14:23:57,411 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:23:57,411 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 104 more)] === [2025-03-17 14:23:57,411 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:23:57,411 INFO L85 PathProgramCache]: Analyzing trace with hash 300817167, now seen corresponding path program 2 times [2025-03-17 14:23:57,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:23:57,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441824313] [2025-03-17 14:23:57,412 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:23:57,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:23:57,423 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 11 statements into 2 equivalence classes. [2025-03-17 14:23:57,445 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 11 of 11 statements. [2025-03-17 14:23:57,447 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:23:57,448 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:57,735 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:23:57,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:23:57,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441824313] [2025-03-17 14:23:57,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441824313] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:23:57,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739759495] [2025-03-17 14:23:57,736 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:23:57,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:23:57,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:23:57,739 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:23:57,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-17 14:23:57,806 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 11 statements into 2 equivalence classes. [2025-03-17 14:23:57,844 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 11 of 11 statements. [2025-03-17 14:23:57,844 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:23:57,844 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:57,848 INFO L256 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-03-17 14:23:57,850 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:23:57,859 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 6 treesize of output 5 [2025-03-17 14:23:57,981 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:23:57,981 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:23:58,091 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:23:58,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739759495] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:23:58,091 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:23:58,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 16 [2025-03-17 14:23:58,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472865219] [2025-03-17 14:23:58,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:23:58,092 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-17 14:23:58,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:23:58,092 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-17 14:23:58,092 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2025-03-17 14:23:59,186 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 186 [2025-03-17 14:23:59,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 192 transitions, 538 flow. Second operand has 18 states, 18 states have (on average 93.83333333333333) internal successors, (1689), 18 states have internal predecessors, (1689), 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) [2025-03-17 14:23:59,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:23:59,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 186 [2025-03-17 14:23:59,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:24:04,720 INFO L124 PetriNetUnfolderBase]: 49607/89323 cut-off events. [2025-03-17 14:24:04,720 INFO L125 PetriNetUnfolderBase]: For 370/370 co-relation queries the response was YES. [2025-03-17 14:24:04,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153244 conditions, 89323 events. 49607/89323 cut-off events. For 370/370 co-relation queries the response was YES. Maximal size of possible extension queue 2268. Compared 850634 event pairs, 29352 based on Foata normal form. 6/71909 useless extension candidates. Maximal degree in co-relation 153126. Up to 63482 conditions per place. [2025-03-17 14:24:05,182 INFO L140 encePairwiseOnDemand]: 173/186 looper letters, 91 selfloop transitions, 34 changer transitions 0/210 dead transitions. [2025-03-17 14:24:05,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 210 transitions, 824 flow [2025-03-17 14:24:05,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-17 14:24:05,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-17 14:24:05,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 959 transitions. [2025-03-17 14:24:05,185 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.572879330943847 [2025-03-17 14:24:05,185 INFO L175 Difference]: Start difference. First operand has 161 places, 192 transitions, 538 flow. Second operand 9 states and 959 transitions. [2025-03-17 14:24:05,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 210 transitions, 824 flow [2025-03-17 14:24:05,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 210 transitions, 738 flow, removed 19 selfloop flow, removed 5 redundant places. [2025-03-17 14:24:05,188 INFO L231 Difference]: Finished difference. Result has 162 places, 198 transitions, 550 flow [2025-03-17 14:24:05,188 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=434, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=550, PETRI_PLACES=162, PETRI_TRANSITIONS=198} [2025-03-17 14:24:05,189 INFO L279 CegarLoopForPetriNet]: 162 programPoint places, 0 predicate places. [2025-03-17 14:24:05,189 INFO L471 AbstractCegarLoop]: Abstraction has has 162 places, 198 transitions, 550 flow [2025-03-17 14:24:05,190 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 93.83333333333333) internal successors, (1689), 18 states have internal predecessors, (1689), 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) [2025-03-17 14:24:05,190 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:24:05,190 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:24:05,197 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-17 14:24:05,394 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2025-03-17 14:24:05,394 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 104 more)] === [2025-03-17 14:24:05,394 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:24:05,395 INFO L85 PathProgramCache]: Analyzing trace with hash -1372092158, now seen corresponding path program 1 times [2025-03-17 14:24:05,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:24:05,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828014903] [2025-03-17 14:24:05,395 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:24:05,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:24:05,403 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-03-17 14:24:05,416 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-03-17 14:24:05,417 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:24:05,417 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:24:05,511 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-03-17 14:24:05,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:24:05,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828014903] [2025-03-17 14:24:05,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828014903] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:24:05,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947582833] [2025-03-17 14:24:05,512 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:24:05,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:24:05,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:24:05,514 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:24:05,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-17 14:24:05,586 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-03-17 14:24:05,610 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-03-17 14:24:05,610 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:24:05,610 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:24:05,612 INFO L256 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-17 14:24:05,613 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:24:05,652 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-03-17 14:24:05,653 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:24:05,684 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-03-17 14:24:05,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947582833] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:24:05,685 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:24:05,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 11 [2025-03-17 14:24:05,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496848566] [2025-03-17 14:24:05,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:24:05,686 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-17 14:24:05,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:24:05,687 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-17 14:24:05,688 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=58, Unknown=0, NotChecked=0, Total=110 [2025-03-17 14:24:05,707 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 186 [2025-03-17 14:24:05,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 198 transitions, 550 flow. Second operand has 11 states, 11 states have (on average 98.18181818181819) internal successors, (1080), 11 states have internal predecessors, (1080), 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) [2025-03-17 14:24:05,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:24:05,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 186 [2025-03-17 14:24:05,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand