./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 e2fb8bed 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-?-e2fb8be-m [2025-03-09 01:20:19,698 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-09 01:20:19,751 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-03-09 01:20:19,756 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-09 01:20:19,756 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-09 01:20:19,778 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-09 01:20:19,778 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-09 01:20:19,778 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-09 01:20:19,778 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-09 01:20:19,778 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-09 01:20:19,779 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-09 01:20:19,779 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-09 01:20:19,779 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-09 01:20:19,779 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-09 01:20:19,779 INFO L153 SettingsManager]: * Use SBE=true [2025-03-09 01:20:19,779 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-09 01:20:19,779 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-09 01:20:19,779 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-09 01:20:19,779 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-09 01:20:19,779 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-09 01:20:19,779 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-03-09 01:20:19,779 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-03-09 01:20:19,779 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-03-09 01:20:19,779 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-09 01:20:19,779 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-03-09 01:20:19,779 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-03-09 01:20:19,780 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-09 01:20:19,780 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-09 01:20:19,780 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-09 01:20:19,780 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-09 01:20:19,780 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-09 01:20:19,780 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-09 01:20:19,780 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-09 01:20:19,780 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-09 01:20:19,780 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-09 01:20:19,780 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-09 01:20:19,780 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-09 01:20:19,780 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-09 01:20:19,780 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-09 01:20:19,780 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-09 01:20:19,780 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-09 01:20:19,780 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-09 01:20:19,780 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 [2025-03-09 01:20:20,008 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-09 01:20:20,015 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-09 01:20:20,018 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-09 01:20:20,020 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-09 01:20:20,020 INFO L274 PluginConnector]: CDTParser initialized [2025-03-09 01:20:20,021 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/chl-nzb-file-subst.wvr.c [2025-03-09 01:20:21,134 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45932fcf1/657f0b6c2ab648d48e425b390d89d352/FLAGf19b79b5f [2025-03-09 01:20:21,360 INFO L384 CDTParser]: Found 1 translation units. [2025-03-09 01:20:21,365 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-nzb-file-subst.wvr.c [2025-03-09 01:20:21,398 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45932fcf1/657f0b6c2ab648d48e425b390d89d352/FLAGf19b79b5f [2025-03-09 01:20:21,695 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45932fcf1/657f0b6c2ab648d48e425b390d89d352 [2025-03-09 01:20:21,696 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-09 01:20:21,697 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-09 01:20:21,698 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-09 01:20:21,698 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-09 01:20:21,701 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-09 01:20:21,701 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.03 01:20:21" (1/1) ... [2025-03-09 01:20:21,702 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30c7e046 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:20:21, skipping insertion in model container [2025-03-09 01:20:21,702 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.03 01:20:21" (1/1) ... [2025-03-09 01:20:21,715 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-09 01:20:21,878 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-03-09 01:20:21,884 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-09 01:20:21,893 INFO L200 MainTranslator]: Completed pre-run [2025-03-09 01:20:21,939 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-09 01:20:21,956 INFO L204 MainTranslator]: Completed translation [2025-03-09 01:20:21,956 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:20:21 WrapperNode [2025-03-09 01:20:21,957 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-09 01:20:21,957 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-09 01:20:21,958 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-09 01:20:21,958 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-09 01:20:21,962 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:20:21" (1/1) ... [2025-03-09 01:20:21,972 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:20:21" (1/1) ... [2025-03-09 01:20:22,015 INFO L138 Inliner]: procedures = 25, calls = 62, calls flagged for inlining = 29, calls inlined = 43, statements flattened = 593 [2025-03-09 01:20:22,017 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-09 01:20:22,017 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-09 01:20:22,017 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-09 01:20:22,017 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-09 01:20:22,023 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:20:21" (1/1) ... [2025-03-09 01:20:22,023 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:20:21" (1/1) ... [2025-03-09 01:20:22,031 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:20:21" (1/1) ... [2025-03-09 01:20:22,056 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]. [2025-03-09 01:20:22,059 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:20:21" (1/1) ... [2025-03-09 01:20:22,060 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:20:21" (1/1) ... [2025-03-09 01:20:22,071 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:20:21" (1/1) ... [2025-03-09 01:20:22,072 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:20:21" (1/1) ... [2025-03-09 01:20:22,074 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:20:21" (1/1) ... [2025-03-09 01:20:22,075 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:20:21" (1/1) ... [2025-03-09 01:20:22,077 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-09 01:20:22,078 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-09 01:20:22,078 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-09 01:20:22,078 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-09 01:20:22,078 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:20:21" (1/1) ... [2025-03-09 01:20:22,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-09 01:20:22,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:20:22,104 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) [2025-03-09 01:20:22,106 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 [2025-03-09 01:20:22,121 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-09 01:20:22,121 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-03-09 01:20:22,121 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-03-09 01:20:22,121 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-03-09 01:20:22,121 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-03-09 01:20:22,121 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2025-03-09 01:20:22,121 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2025-03-09 01:20:22,121 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-09 01:20:22,121 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-09 01:20:22,121 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-09 01:20:22,121 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-09 01:20:22,121 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-03-09 01:20:22,121 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-09 01:20:22,121 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-09 01:20:22,121 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-09 01:20:22,122 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-09 01:20:22,122 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-03-09 01:20:22,218 INFO L256 CfgBuilder]: Building ICFG [2025-03-09 01:20:22,219 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-09 01:20:22,916 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-09 01:20:22,916 INFO L307 CfgBuilder]: Performing block encoding [2025-03-09 01:20:23,334 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-09 01:20:23,336 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-09 01:20:23,336 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 09.03 01:20:23 BoogieIcfgContainer [2025-03-09 01:20:23,336 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-09 01:20:23,337 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-09 01:20:23,337 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-09 01:20:23,341 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-09 01:20:23,341 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.03 01:20:21" (1/3) ... [2025-03-09 01:20:23,341 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d46aa48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.03 01:20:23, skipping insertion in model container [2025-03-09 01:20:23,342 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:20:21" (2/3) ... [2025-03-09 01:20:23,342 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d46aa48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.03 01:20:23, skipping insertion in model container [2025-03-09 01:20:23,342 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 09.03 01:20:23" (3/3) ... [2025-03-09 01:20:23,343 INFO L128 eAbstractionObserver]: Analyzing ICFG chl-nzb-file-subst.wvr.c [2025-03-09 01:20:23,354 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-09 01:20:23,357 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. [2025-03-09 01:20:23,357 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-09 01:20:23,464 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2025-03-09 01:20:23,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 166 places, 186 transitions, 393 flow [2025-03-09 01:20:23,589 INFO L124 PetriNetUnfolderBase]: 30/183 cut-off events. [2025-03-09 01:20:23,592 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-03-09 01:20:23,599 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 724 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. [2025-03-09 01:20:23,600 INFO L82 GeneralOperation]: Start removeDead. Operand has 166 places, 186 transitions, 393 flow [2025-03-09 01:20:23,606 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 162 places, 182 transitions, 382 flow [2025-03-09 01:20:23,613 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-09 01:20:23,624 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;@93b4b3d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-09 01:20:23,624 INFO L334 AbstractCegarLoop]: Starting to check reachability of 107 error locations. [2025-03-09 01:20:23,629 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-09 01:20:23,629 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2025-03-09 01:20:23,630 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-03-09 01:20:23,630 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:20:23,630 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-03-09 01:20:23,630 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 104 more)] === [2025-03-09 01:20:23,634 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:20:23,634 INFO L85 PathProgramCache]: Analyzing trace with hash 1702794, now seen corresponding path program 1 times [2025-03-09 01:20:23,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:20:23,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436038490] [2025-03-09 01:20:23,639 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:20:23,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:20:23,695 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-03-09 01:20:23,721 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-03-09 01:20:23,722 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:20:23,722 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:20:23,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:20:23,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:20:23,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436038490] [2025-03-09 01:20:23,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436038490] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:20:23,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:20:23,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-03-09 01:20:23,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051559174] [2025-03-09 01:20:23,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:20:23,871 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-09 01:20:23,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:20:23,887 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-09 01:20:23,888 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-09 01:20:23,939 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 186 [2025-03-09 01:20:23,942 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) [2025-03-09 01:20:23,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:20:23,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 186 [2025-03-09 01:20:23,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:20:29,556 INFO L124 PetriNetUnfolderBase]: 49598/89287 cut-off events. [2025-03-09 01:20:29,557 INFO L125 PetriNetUnfolderBase]: For 1204/1204 co-relation queries the response was YES. [2025-03-09 01:20:29,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153712 conditions, 89287 events. 49598/89287 cut-off events. For 1204/1204 co-relation queries the response was YES. Maximal size of possible extension queue 2254. Compared 849617 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. [2025-03-09 01:20:30,041 INFO L140 encePairwiseOnDemand]: 177/186 looper letters, 84 selfloop transitions, 2 changer transitions 0/174 dead transitions. [2025-03-09 01:20:30,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 174 transitions, 538 flow [2025-03-09 01:20:30,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-09 01:20:30,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-09 01:20:30,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 369 transitions. [2025-03-09 01:20:30,054 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6612903225806451 [2025-03-09 01:20:30,055 INFO L175 Difference]: Start difference. First operand has 162 places, 182 transitions, 382 flow. Second operand 3 states and 369 transitions. [2025-03-09 01:20:30,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 174 transitions, 538 flow [2025-03-09 01:20:30,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 174 transitions, 526 flow, removed 0 selfloop flow, removed 6 redundant places. [2025-03-09 01:20:30,067 INFO L231 Difference]: Finished difference. Result has 153 places, 174 transitions, 358 flow [2025-03-09 01:20:30,068 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} [2025-03-09 01:20:30,072 INFO L279 CegarLoopForPetriNet]: 162 programPoint places, -9 predicate places. [2025-03-09 01:20:30,072 INFO L471 AbstractCegarLoop]: Abstraction has has 153 places, 174 transitions, 358 flow [2025-03-09 01:20:30,073 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) [2025-03-09 01:20:30,073 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:20:30,073 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-03-09 01:20:30,073 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-09 01:20:30,073 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 104 more)] === [2025-03-09 01:20:30,074 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:20:30,074 INFO L85 PathProgramCache]: Analyzing trace with hash 1702795, now seen corresponding path program 1 times [2025-03-09 01:20:30,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:20:30,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360519077] [2025-03-09 01:20:30,075 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:20:30,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:20:30,083 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-03-09 01:20:30,106 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-03-09 01:20:30,108 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:20:30,108 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:20:30,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:20:30,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:20:30,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360519077] [2025-03-09 01:20:30,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360519077] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:20:30,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:20:30,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-09 01:20:30,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905580855] [2025-03-09 01:20:30,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:20:30,448 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-09 01:20:30,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:20:30,448 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-09 01:20:30,448 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-09 01:20:30,534 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 186 [2025-03-09 01:20:30,535 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) [2025-03-09 01:20:30,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:20:30,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 186 [2025-03-09 01:20:30,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:20:34,887 INFO L124 PetriNetUnfolderBase]: 49601/89296 cut-off events. [2025-03-09 01:20:34,887 INFO L125 PetriNetUnfolderBase]: For 294/294 co-relation queries the response was YES. [2025-03-09 01:20:34,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153112 conditions, 89296 events. 49601/89296 cut-off events. For 294/294 co-relation queries the response was YES. Maximal size of possible extension queue 2254. Compared 849680 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. [2025-03-09 01:20:35,281 INFO L140 encePairwiseOnDemand]: 176/186 looper letters, 91 selfloop transitions, 7 changer transitions 0/183 dead transitions. [2025-03-09 01:20:35,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 183 transitions, 574 flow [2025-03-09 01:20:35,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-09 01:20:35,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-09 01:20:35,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 377 transitions. [2025-03-09 01:20:35,284 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6756272401433692 [2025-03-09 01:20:35,284 INFO L175 Difference]: Start difference. First operand has 153 places, 174 transitions, 358 flow. Second operand 3 states and 377 transitions. [2025-03-09 01:20:35,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 183 transitions, 574 flow [2025-03-09 01:20:35,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 183 transitions, 568 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-09 01:20:35,291 INFO L231 Difference]: Finished difference. Result has 155 places, 180 transitions, 412 flow [2025-03-09 01:20:35,293 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} [2025-03-09 01:20:35,294 INFO L279 CegarLoopForPetriNet]: 162 programPoint places, -7 predicate places. [2025-03-09 01:20:35,294 INFO L471 AbstractCegarLoop]: Abstraction has has 155 places, 180 transitions, 412 flow [2025-03-09 01:20:35,294 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) [2025-03-09 01:20:35,295 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:20:35,295 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2025-03-09 01:20:35,295 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-09 01:20:35,295 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 104 more)] === [2025-03-09 01:20:35,295 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:20:35,295 INFO L85 PathProgramCache]: Analyzing trace with hash 1636435870, now seen corresponding path program 1 times [2025-03-09 01:20:35,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:20:35,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014452485] [2025-03-09 01:20:35,296 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:20:35,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:20:35,307 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-03-09 01:20:35,320 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-03-09 01:20:35,320 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:20:35,320 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:20:35,524 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:20:35,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:20:35,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014452485] [2025-03-09 01:20:35,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014452485] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 01:20:35,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972060955] [2025-03-09 01:20:35,525 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:20:35,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:20:35,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:20:35,528 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) [2025-03-09 01:20:35,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-09 01:20:35,601 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-03-09 01:20:35,615 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-03-09 01:20:35,615 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:20:35,615 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:20:35,617 INFO L256 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-03-09 01:20:35,619 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:20:35,650 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 [2025-03-09 01:20:35,700 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:20:35,701 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 01:20:35,763 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:20:35,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972060955] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 01:20:35,764 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-09 01:20:35,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2025-03-09 01:20:35,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5560603] [2025-03-09 01:20:35,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-09 01:20:35,764 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-09 01:20:35,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:20:35,765 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-09 01:20:35,765 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2025-03-09 01:20:36,069 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 186 [2025-03-09 01:20:36,070 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) [2025-03-09 01:20:36,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:20:36,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 186 [2025-03-09 01:20:36,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:20:40,931 INFO L124 PetriNetUnfolderBase]: 49610/89323 cut-off events. [2025-03-09 01:20:40,931 INFO L125 PetriNetUnfolderBase]: For 297/297 co-relation queries the response was YES. [2025-03-09 01:20:41,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153211 conditions, 89323 events. 49610/89323 cut-off events. For 297/297 co-relation queries the response was YES. Maximal size of possible extension queue 2254. Compared 849927 event pairs, 29352 based on Foata normal form. 0/71900 useless extension candidates. Maximal degree in co-relation 153062. Up to 63495 conditions per place. [2025-03-09 01:20:41,302 INFO L140 encePairwiseOnDemand]: 176/186 looper letters, 100 selfloop transitions, 25 changer transitions 0/210 dead transitions. [2025-03-09 01:20:41,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 210 transitions, 770 flow [2025-03-09 01:20:41,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-09 01:20:41,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-09 01:20:41,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 686 transitions. [2025-03-09 01:20:41,305 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6146953405017921 [2025-03-09 01:20:41,305 INFO L175 Difference]: Start difference. First operand has 155 places, 180 transitions, 412 flow. Second operand 6 states and 686 transitions. [2025-03-09 01:20:41,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 210 transitions, 770 flow [2025-03-09 01:20:41,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 210 transitions, 744 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-09 01:20:41,308 INFO L231 Difference]: Finished difference. Result has 161 places, 198 transitions, 573 flow [2025-03-09 01:20:41,308 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=398, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=573, PETRI_PLACES=161, PETRI_TRANSITIONS=198} [2025-03-09 01:20:41,309 INFO L279 CegarLoopForPetriNet]: 162 programPoint places, -1 predicate places. [2025-03-09 01:20:41,309 INFO L471 AbstractCegarLoop]: Abstraction has has 161 places, 198 transitions, 573 flow [2025-03-09 01:20:41,309 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) [2025-03-09 01:20:41,309 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:20:41,309 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:20:41,316 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-09 01:20:41,510 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 [2025-03-09 01:20:41,510 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 104 more)] === [2025-03-09 01:20:41,510 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:20:41,510 INFO L85 PathProgramCache]: Analyzing trace with hash 1434413843, now seen corresponding path program 1 times [2025-03-09 01:20:41,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:20:41,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293031437] [2025-03-09 01:20:41,510 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:20:41,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:20:41,519 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-09 01:20:41,527 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-09 01:20:41,527 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:20:41,527 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:20:41,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:20:41,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:20:41,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293031437] [2025-03-09 01:20:41,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293031437] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:20:41,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:20:41,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-09 01:20:41,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328417688] [2025-03-09 01:20:41,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:20:41,606 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-09 01:20:41,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:20:41,606 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-09 01:20:41,606 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-09 01:20:41,614 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 186 [2025-03-09 01:20:41,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 198 transitions, 573 flow. Second operand has 3 states, 3 states have (on average 98.0) internal successors, (294), 3 states have internal predecessors, (294), 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) [2025-03-09 01:20:41,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:20:41,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 186 [2025-03-09 01:20:41,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:20:47,013 INFO L124 PetriNetUnfolderBase]: 49607/89320 cut-off events. [2025-03-09 01:20:47,013 INFO L125 PetriNetUnfolderBase]: For 345/345 co-relation queries the response was YES. [2025-03-09 01:20:47,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153244 conditions, 89320 events. 49607/89320 cut-off events. For 345/345 co-relation queries the response was YES. Maximal size of possible extension queue 2253. Compared 849879 event pairs, 29352 based on Foata normal form. 3/71903 useless extension candidates. Maximal degree in co-relation 153141. Up to 63509 conditions per place. [2025-03-09 01:20:47,481 INFO L140 encePairwiseOnDemand]: 179/186 looper letters, 98 selfloop transitions, 12 changer transitions 0/198 dead transitions. [2025-03-09 01:20:47,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 198 transitions, 785 flow [2025-03-09 01:20:47,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-09 01:20:47,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-09 01:20:47,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 380 transitions. [2025-03-09 01:20:47,483 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6810035842293907 [2025-03-09 01:20:47,483 INFO L175 Difference]: Start difference. First operand has 161 places, 198 transitions, 573 flow. Second operand 3 states and 380 transitions. [2025-03-09 01:20:47,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 198 transitions, 785 flow [2025-03-09 01:20:47,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 198 transitions, 749 flow, removed 12 selfloop flow, removed 1 redundant places. [2025-03-09 01:20:47,487 INFO L231 Difference]: Finished difference. Result has 162 places, 195 transitions, 547 flow [2025-03-09 01:20:47,487 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=523, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=547, PETRI_PLACES=162, PETRI_TRANSITIONS=195} [2025-03-09 01:20:47,488 INFO L279 CegarLoopForPetriNet]: 162 programPoint places, 0 predicate places. [2025-03-09 01:20:47,488 INFO L471 AbstractCegarLoop]: Abstraction has has 162 places, 195 transitions, 547 flow [2025-03-09 01:20:47,488 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 98.0) internal successors, (294), 3 states have internal predecessors, (294), 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) [2025-03-09 01:20:47,488 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:20:47,488 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2025-03-09 01:20:47,488 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-03-09 01:20:47,488 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 104 more)] === [2025-03-09 01:20:47,489 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:20:47,489 INFO L85 PathProgramCache]: Analyzing trace with hash 1074435927, now seen corresponding path program 2 times [2025-03-09 01:20:47,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:20:47,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030585542] [2025-03-09 01:20:47,489 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-09 01:20:47,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:20:47,498 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 11 statements into 2 equivalence classes. [2025-03-09 01:20:47,513 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 11 of 11 statements. [2025-03-09 01:20:47,514 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-09 01:20:47,514 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:20:47,766 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:20:47,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:20:47,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030585542] [2025-03-09 01:20:47,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030585542] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 01:20:47,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343241859] [2025-03-09 01:20:47,767 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-09 01:20:47,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:20:47,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:20:47,770 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) [2025-03-09 01:20:47,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-09 01:20:47,839 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 11 statements into 2 equivalence classes. [2025-03-09 01:20:47,857 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 11 of 11 statements. [2025-03-09 01:20:47,857 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-09 01:20:47,857 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:20:47,858 INFO L256 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-03-09 01:20:47,859 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:20:47,874 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 [2025-03-09 01:20:48,015 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:20:48,015 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 01:20:48,124 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:20:48,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343241859] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 01:20:48,124 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-09 01:20:48,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 16 [2025-03-09 01:20:48,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131855158] [2025-03-09 01:20:48,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-09 01:20:48,124 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-09 01:20:48,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:20:48,125 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-09 01:20:48,125 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2025-03-09 01:20:49,154 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 186 [2025-03-09 01:20:49,156 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 195 transitions, 547 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) [2025-03-09 01:20:49,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:20:49,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 186 [2025-03-09 01:20:49,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:20:55,151 INFO L124 PetriNetUnfolderBase]: 49610/89326 cut-off events. [2025-03-09 01:20:55,152 INFO L125 PetriNetUnfolderBase]: For 357/357 co-relation queries the response was YES. [2025-03-09 01:20:55,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153251 conditions, 89326 events. 49610/89326 cut-off events. For 357/357 co-relation queries the response was YES. Maximal size of possible extension queue 2268. Compared 850683 event pairs, 29352 based on Foata normal form. 6/71912 useless extension candidates. Maximal degree in co-relation 153139. Up to 63483 conditions per place. [2025-03-09 01:20:55,557 INFO L140 encePairwiseOnDemand]: 173/186 looper letters, 91 selfloop transitions, 37 changer transitions 0/213 dead transitions. [2025-03-09 01:20:55,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 213 transitions, 841 flow [2025-03-09 01:20:55,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-09 01:20:55,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-09 01:20:55,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 962 transitions. [2025-03-09 01:20:55,561 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5746714456391876 [2025-03-09 01:20:55,561 INFO L175 Difference]: Start difference. First operand has 162 places, 195 transitions, 547 flow. Second operand 9 states and 962 transitions. [2025-03-09 01:20:55,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 213 transitions, 841 flow [2025-03-09 01:20:55,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 213 transitions, 756 flow, removed 8 selfloop flow, removed 6 redundant places. [2025-03-09 01:20:55,564 INFO L231 Difference]: Finished difference. Result has 162 places, 201 transitions, 568 flow [2025-03-09 01:20:55,568 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=446, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=568, PETRI_PLACES=162, PETRI_TRANSITIONS=201} [2025-03-09 01:20:55,568 INFO L279 CegarLoopForPetriNet]: 162 programPoint places, 0 predicate places. [2025-03-09 01:20:55,568 INFO L471 AbstractCegarLoop]: Abstraction has has 162 places, 201 transitions, 568 flow [2025-03-09 01:20:55,569 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) [2025-03-09 01:20:55,569 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:20:55,569 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:20:55,580 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-03-09 01:20:55,771 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:20:55,771 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 104 more)] === [2025-03-09 01:20:55,771 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:20:55,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1899050130, now seen corresponding path program 1 times [2025-03-09 01:20:55,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:20:55,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038887335] [2025-03-09 01:20:55,771 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:20:55,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:20:55,782 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-09 01:20:55,795 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-09 01:20:55,795 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:20:55,795 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:20:55,853 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-09 01:20:55,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:20:55,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038887335] [2025-03-09 01:20:55,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038887335] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 01:20:55,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537715567] [2025-03-09 01:20:55,854 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:20:55,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:20:55,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:20:55,856 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) [2025-03-09 01:20:55,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-09 01:20:55,925 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-09 01:20:55,947 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-09 01:20:55,947 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:20:55,947 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:20:55,948 INFO L256 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-03-09 01:20:55,949 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:20:55,979 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-09 01:20:55,980 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 01:20:55,993 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-09 01:20:55,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537715567] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 01:20:55,993 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-09 01:20:55,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2025-03-09 01:20:55,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679930410] [2025-03-09 01:20:55,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-09 01:20:55,994 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-09 01:20:55,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:20:55,994 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-09 01:20:55,994 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2025-03-09 01:20:56,006 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 186 [2025-03-09 01:20:56,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 201 transitions, 568 flow. Second operand has 8 states, 8 states have (on average 97.875) internal successors, (783), 8 states have internal predecessors, (783), 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) [2025-03-09 01:20:56,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:20:56,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 186 [2025-03-09 01:20:56,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand