./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/pthread/bigshot_s2.i --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/pthread/bigshot_s2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash fa644cc26c2bb4f900e6af52233648196eb4dff503d36a50559ddcf2a4270ffb --- Real Ultimate output --- This is Ultimate 0.3.0-?-e2fb8be-m [2025-03-09 00:53:04,782 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-09 00:53:04,821 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-03-09 00:53:04,824 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-09 00:53:04,824 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-09 00:53:04,841 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-09 00:53:04,841 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-09 00:53:04,841 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-09 00:53:04,842 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-09 00:53:04,842 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-09 00:53:04,843 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-09 00:53:04,843 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-09 00:53:04,843 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-09 00:53:04,843 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-09 00:53:04,843 INFO L153 SettingsManager]: * Use SBE=true [2025-03-09 00:53:04,844 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-09 00:53:04,844 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-09 00:53:04,844 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-09 00:53:04,844 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-09 00:53:04,844 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-09 00:53:04,844 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-03-09 00:53:04,844 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-03-09 00:53:04,844 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-03-09 00:53:04,844 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-09 00:53:04,844 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-03-09 00:53:04,845 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-03-09 00:53:04,845 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-09 00:53:04,845 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-09 00:53:04,845 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-09 00:53:04,845 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-09 00:53:04,845 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-09 00:53:04,845 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-09 00:53:04,845 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-09 00:53:04,845 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-09 00:53:04,846 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-09 00:53:04,846 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-09 00:53:04,846 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-09 00:53:04,846 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-09 00:53:04,846 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-09 00:53:04,846 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-09 00:53:04,846 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-09 00:53:04,846 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-09 00:53:04,846 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 -> fa644cc26c2bb4f900e6af52233648196eb4dff503d36a50559ddcf2a4270ffb [2025-03-09 00:53:05,060 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-09 00:53:05,068 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-09 00:53:05,070 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-09 00:53:05,071 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-09 00:53:05,071 INFO L274 PluginConnector]: CDTParser initialized [2025-03-09 00:53:05,072 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread/bigshot_s2.i [2025-03-09 00:53:06,188 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd54f20d5/2ebb7cafedd54a51b3a49d901c88f808/FLAG6f8cabc2c [2025-03-09 00:53:06,437 INFO L384 CDTParser]: Found 1 translation units. [2025-03-09 00:53:06,438 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/bigshot_s2.i [2025-03-09 00:53:06,455 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd54f20d5/2ebb7cafedd54a51b3a49d901c88f808/FLAG6f8cabc2c [2025-03-09 00:53:06,752 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd54f20d5/2ebb7cafedd54a51b3a49d901c88f808 [2025-03-09 00:53:06,754 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-09 00:53:06,755 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-09 00:53:06,756 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-09 00:53:06,756 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-09 00:53:06,759 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-09 00:53:06,759 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.03 12:53:06" (1/1) ... [2025-03-09 00:53:06,760 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3074153e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 12:53:06, skipping insertion in model container [2025-03-09 00:53:06,760 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.03 12:53:06" (1/1) ... [2025-03-09 00:53:06,790 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-09 00:53:07,098 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-09 00:53:07,104 INFO L200 MainTranslator]: Completed pre-run [2025-03-09 00:53:07,135 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-09 00:53:07,176 INFO L204 MainTranslator]: Completed translation [2025-03-09 00:53:07,177 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 12:53:07 WrapperNode [2025-03-09 00:53:07,177 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-09 00:53:07,178 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-09 00:53:07,178 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-09 00:53:07,178 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-09 00:53:07,182 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 12:53:07" (1/1) ... [2025-03-09 00:53:07,196 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 12:53:07" (1/1) ... [2025-03-09 00:53:07,212 INFO L138 Inliner]: procedures = 322, calls = 24, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 63 [2025-03-09 00:53:07,212 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-09 00:53:07,214 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-09 00:53:07,215 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-09 00:53:07,215 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-09 00:53:07,219 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 12:53:07" (1/1) ... [2025-03-09 00:53:07,219 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 12:53:07" (1/1) ... [2025-03-09 00:53:07,222 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 12:53:07" (1/1) ... [2025-03-09 00:53:07,232 INFO L175 MemorySlicer]: Split 13 memory accesses to 3 slices as follows [2, 9, 2]. 69 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 8, 0]. The 1 writes are split as follows [0, 0, 1]. [2025-03-09 00:53:07,233 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 12:53:07" (1/1) ... [2025-03-09 00:53:07,233 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 12:53:07" (1/1) ... [2025-03-09 00:53:07,236 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 12:53:07" (1/1) ... [2025-03-09 00:53:07,236 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 12:53:07" (1/1) ... [2025-03-09 00:53:07,237 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 12:53:07" (1/1) ... [2025-03-09 00:53:07,238 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 12:53:07" (1/1) ... [2025-03-09 00:53:07,239 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-09 00:53:07,240 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-09 00:53:07,240 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-09 00:53:07,240 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-09 00:53:07,241 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 12:53:07" (1/1) ... [2025-03-09 00:53:07,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-09 00:53:07,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 00:53:07,264 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 00:53:07,266 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 00:53:07,280 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#0 [2025-03-09 00:53:07,281 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#1 [2025-03-09 00:53:07,281 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#2 [2025-03-09 00:53:07,281 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-09 00:53:07,281 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-09 00:53:07,281 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-03-09 00:53:07,281 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-03-09 00:53:07,281 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-03-09 00:53:07,281 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-03-09 00:53:07,281 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-03-09 00:53:07,281 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-03-09 00:53:07,281 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-09 00:53:07,281 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-09 00:53:07,281 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-09 00:53:07,281 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-03-09 00:53:07,281 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-09 00:53:07,281 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-09 00:53:07,282 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 00:53:07,378 INFO L256 CfgBuilder]: Building ICFG [2025-03-09 00:53:07,379 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-09 00:53:07,541 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-09 00:53:07,542 INFO L307 CfgBuilder]: Performing block encoding [2025-03-09 00:53:07,601 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-09 00:53:07,601 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-09 00:53:07,602 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 09.03 12:53:07 BoogieIcfgContainer [2025-03-09 00:53:07,602 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-09 00:53:07,604 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-09 00:53:07,605 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-09 00:53:07,608 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-09 00:53:07,608 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.03 12:53:06" (1/3) ... [2025-03-09 00:53:07,609 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c16f33c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.03 12:53:07, skipping insertion in model container [2025-03-09 00:53:07,609 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 12:53:07" (2/3) ... [2025-03-09 00:53:07,609 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c16f33c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.03 12:53:07, skipping insertion in model container [2025-03-09 00:53:07,610 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 09.03 12:53:07" (3/3) ... [2025-03-09 00:53:07,611 INFO L128 eAbstractionObserver]: Analyzing ICFG bigshot_s2.i [2025-03-09 00:53:07,623 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-09 00:53:07,625 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG bigshot_s2.i that has 3 procedures, 39 locations, 1 initial locations, 1 loop locations, and 10 error locations. [2025-03-09 00:53:07,625 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-09 00:53:07,673 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-03-09 00:53:07,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 45 places, 43 transitions, 100 flow [2025-03-09 00:53:07,727 INFO L124 PetriNetUnfolderBase]: 5/41 cut-off events. [2025-03-09 00:53:07,730 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-03-09 00:53:07,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50 conditions, 41 events. 5/41 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 78 event pairs, 0 based on Foata normal form. 0/26 useless extension candidates. Maximal degree in co-relation 39. Up to 2 conditions per place. [2025-03-09 00:53:07,733 INFO L82 GeneralOperation]: Start removeDead. Operand has 45 places, 43 transitions, 100 flow [2025-03-09 00:53:07,736 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 40 transitions, 92 flow [2025-03-09 00:53:07,742 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-09 00:53:07,752 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;@22cad221, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-09 00:53:07,753 INFO L334 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2025-03-09 00:53:07,757 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-09 00:53:07,757 INFO L124 PetriNetUnfolderBase]: 0/13 cut-off events. [2025-03-09 00:53:07,757 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-03-09 00:53:07,758 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 00:53:07,759 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 00:53:07,760 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-03-09 00:53:07,764 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 00:53:07,764 INFO L85 PathProgramCache]: Analyzing trace with hash -329561414, now seen corresponding path program 1 times [2025-03-09 00:53:07,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 00:53:07,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351751090] [2025-03-09 00:53:07,771 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 00:53:07,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 00:53:07,824 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-09 00:53:07,844 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-09 00:53:07,844 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 00:53:07,844 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 00:53:08,052 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 00:53:08,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 00:53:08,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351751090] [2025-03-09 00:53:08,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351751090] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 00:53:08,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 00:53:08,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-09 00:53:08,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192045966] [2025-03-09 00:53:08,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 00:53:08,059 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-09 00:53:08,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 00:53:08,075 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-09 00:53:08,076 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-09 00:53:08,096 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 43 [2025-03-09 00:53:08,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 40 transitions, 92 flow. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 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 00:53:08,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 00:53:08,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 43 [2025-03-09 00:53:08,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 00:53:08,162 INFO L124 PetriNetUnfolderBase]: 9/55 cut-off events. [2025-03-09 00:53:08,163 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-03-09 00:53:08,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96 conditions, 55 events. 9/55 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 142 event pairs, 2 based on Foata normal form. 2/49 useless extension candidates. Maximal degree in co-relation 75. Up to 20 conditions per place. [2025-03-09 00:53:08,165 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 16 selfloop transitions, 3 changer transitions 0/35 dead transitions. [2025-03-09 00:53:08,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 35 transitions, 120 flow [2025-03-09 00:53:08,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-09 00:53:08,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-09 00:53:08,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 96 transitions. [2025-03-09 00:53:08,175 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5581395348837209 [2025-03-09 00:53:08,176 INFO L175 Difference]: Start difference. First operand has 42 places, 40 transitions, 92 flow. Second operand 4 states and 96 transitions. [2025-03-09 00:53:08,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 35 transitions, 120 flow [2025-03-09 00:53:08,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 35 transitions, 112 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-03-09 00:53:08,182 INFO L231 Difference]: Finished difference. Result has 38 places, 34 transitions, 78 flow [2025-03-09 00:53:08,184 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=78, PETRI_PLACES=38, PETRI_TRANSITIONS=34} [2025-03-09 00:53:08,187 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, -4 predicate places. [2025-03-09 00:53:08,187 INFO L471 AbstractCegarLoop]: Abstraction has has 38 places, 34 transitions, 78 flow [2025-03-09 00:53:08,187 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 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 00:53:08,187 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 00:53:08,187 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 00:53:08,188 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-09 00:53:08,188 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-03-09 00:53:08,188 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 00:53:08,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1626469072, now seen corresponding path program 1 times [2025-03-09 00:53:08,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 00:53:08,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876015642] [2025-03-09 00:53:08,188 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 00:53:08,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 00:53:08,197 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-09 00:53:08,202 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-09 00:53:08,202 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 00:53:08,202 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 00:53:08,336 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 00:53:08,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 00:53:08,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876015642] [2025-03-09 00:53:08,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876015642] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 00:53:08,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 00:53:08,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-09 00:53:08,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215372472] [2025-03-09 00:53:08,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 00:53:08,338 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-09 00:53:08,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 00:53:08,339 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-09 00:53:08,339 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-09 00:53:08,354 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 43 [2025-03-09 00:53:08,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 34 transitions, 78 flow. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 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 00:53:08,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 00:53:08,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 43 [2025-03-09 00:53:08,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 00:53:08,429 INFO L124 PetriNetUnfolderBase]: 14/71 cut-off events. [2025-03-09 00:53:08,429 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2025-03-09 00:53:08,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125 conditions, 71 events. 14/71 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 169 event pairs, 6 based on Foata normal form. 2/60 useless extension candidates. Maximal degree in co-relation 46. Up to 36 conditions per place. [2025-03-09 00:53:08,430 INFO L140 encePairwiseOnDemand]: 37/43 looper letters, 19 selfloop transitions, 4 changer transitions 0/38 dead transitions. [2025-03-09 00:53:08,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 38 transitions, 134 flow [2025-03-09 00:53:08,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-09 00:53:08,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-09 00:53:08,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 101 transitions. [2025-03-09 00:53:08,433 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5872093023255814 [2025-03-09 00:53:08,433 INFO L175 Difference]: Start difference. First operand has 38 places, 34 transitions, 78 flow. Second operand 4 states and 101 transitions. [2025-03-09 00:53:08,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 38 transitions, 134 flow [2025-03-09 00:53:08,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 38 transitions, 126 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-09 00:53:08,435 INFO L231 Difference]: Finished difference. Result has 39 places, 36 transitions, 95 flow [2025-03-09 00:53:08,435 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=95, PETRI_PLACES=39, PETRI_TRANSITIONS=36} [2025-03-09 00:53:08,436 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, -3 predicate places. [2025-03-09 00:53:08,436 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 36 transitions, 95 flow [2025-03-09 00:53:08,436 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 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 00:53:08,436 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 00:53:08,436 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 00:53:08,436 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-09 00:53:08,437 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-03-09 00:53:08,438 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 00:53:08,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1119066493, now seen corresponding path program 1 times [2025-03-09 00:53:08,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 00:53:08,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670969197] [2025-03-09 00:53:08,439 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 00:53:08,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 00:53:08,446 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-03-09 00:53:08,449 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-03-09 00:53:08,449 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 00:53:08,449 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 00:53:08,509 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 00:53:08,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 00:53:08,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670969197] [2025-03-09 00:53:08,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670969197] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 00:53:08,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 00:53:08,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-09 00:53:08,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489098546] [2025-03-09 00:53:08,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 00:53:08,510 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-09 00:53:08,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 00:53:08,510 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-09 00:53:08,510 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-09 00:53:08,543 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 43 [2025-03-09 00:53:08,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 36 transitions, 95 flow. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 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 00:53:08,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 00:53:08,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 43 [2025-03-09 00:53:08,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 00:53:08,600 INFO L124 PetriNetUnfolderBase]: 14/73 cut-off events. [2025-03-09 00:53:08,600 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2025-03-09 00:53:08,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140 conditions, 73 events. 14/73 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 165 event pairs, 1 based on Foata normal form. 0/68 useless extension candidates. Maximal degree in co-relation 45. Up to 20 conditions per place. [2025-03-09 00:53:08,601 INFO L140 encePairwiseOnDemand]: 38/43 looper letters, 18 selfloop transitions, 4 changer transitions 0/36 dead transitions. [2025-03-09 00:53:08,601 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 36 transitions, 139 flow [2025-03-09 00:53:08,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-09 00:53:08,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-09 00:53:08,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 94 transitions. [2025-03-09 00:53:08,602 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5465116279069767 [2025-03-09 00:53:08,602 INFO L175 Difference]: Start difference. First operand has 39 places, 36 transitions, 95 flow. Second operand 4 states and 94 transitions. [2025-03-09 00:53:08,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 36 transitions, 139 flow [2025-03-09 00:53:08,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 36 transitions, 134 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-09 00:53:08,603 INFO L231 Difference]: Finished difference. Result has 38 places, 34 transitions, 94 flow [2025-03-09 00:53:08,603 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=94, PETRI_PLACES=38, PETRI_TRANSITIONS=34} [2025-03-09 00:53:08,604 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, -4 predicate places. [2025-03-09 00:53:08,604 INFO L471 AbstractCegarLoop]: Abstraction has has 38 places, 34 transitions, 94 flow [2025-03-09 00:53:08,604 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 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 00:53:08,604 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 00:53:08,604 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 00:53:08,604 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-09 00:53:08,604 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-03-09 00:53:08,605 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 00:53:08,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1098856874, now seen corresponding path program 1 times [2025-03-09 00:53:08,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 00:53:08,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445039948] [2025-03-09 00:53:08,606 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 00:53:08,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 00:53:08,612 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-03-09 00:53:08,616 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-03-09 00:53:08,616 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 00:53:08,616 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 00:53:08,628 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 00:53:08,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 00:53:08,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445039948] [2025-03-09 00:53:08,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445039948] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 00:53:08,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 00:53:08,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-09 00:53:08,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401700792] [2025-03-09 00:53:08,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 00:53:08,631 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-09 00:53:08,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 00:53:08,631 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-09 00:53:08,631 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-09 00:53:08,635 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 43 [2025-03-09 00:53:08,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 34 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 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 00:53:08,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 00:53:08,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 43 [2025-03-09 00:53:08,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 00:53:08,672 INFO L124 PetriNetUnfolderBase]: 11/64 cut-off events. [2025-03-09 00:53:08,675 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2025-03-09 00:53:08,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128 conditions, 64 events. 11/64 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 138 event pairs, 6 based on Foata normal form. 2/61 useless extension candidates. Maximal degree in co-relation 54. Up to 33 conditions per place. [2025-03-09 00:53:08,676 INFO L140 encePairwiseOnDemand]: 41/43 looper letters, 19 selfloop transitions, 1 changer transitions 0/34 dead transitions. [2025-03-09 00:53:08,676 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 34 transitions, 134 flow [2025-03-09 00:53:08,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-09 00:53:08,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-09 00:53:08,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 79 transitions. [2025-03-09 00:53:08,677 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6124031007751938 [2025-03-09 00:53:08,677 INFO L175 Difference]: Start difference. First operand has 38 places, 34 transitions, 94 flow. Second operand 3 states and 79 transitions. [2025-03-09 00:53:08,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 34 transitions, 134 flow [2025-03-09 00:53:08,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 34 transitions, 126 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-09 00:53:08,678 INFO L231 Difference]: Finished difference. Result has 37 places, 33 transitions, 86 flow [2025-03-09 00:53:08,678 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=37, PETRI_TRANSITIONS=33} [2025-03-09 00:53:08,679 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, -5 predicate places. [2025-03-09 00:53:08,679 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 33 transitions, 86 flow [2025-03-09 00:53:08,679 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 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 00:53:08,679 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 00:53:08,679 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 00:53:08,679 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-03-09 00:53:08,679 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-03-09 00:53:08,679 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 00:53:08,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1099818454, now seen corresponding path program 1 times [2025-03-09 00:53:08,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 00:53:08,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926705030] [2025-03-09 00:53:08,679 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 00:53:08,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 00:53:08,686 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-03-09 00:53:08,691 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-03-09 00:53:08,691 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 00:53:08,691 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 00:53:08,782 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 00:53:08,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 00:53:08,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926705030] [2025-03-09 00:53:08,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926705030] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 00:53:08,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 00:53:08,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-09 00:53:08,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540602591] [2025-03-09 00:53:08,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 00:53:08,783 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-09 00:53:08,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 00:53:08,784 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-09 00:53:08,784 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-09 00:53:08,799 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 43 [2025-03-09 00:53:08,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 33 transitions, 86 flow. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 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 00:53:08,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 00:53:08,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 43 [2025-03-09 00:53:08,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 00:53:08,847 INFO L124 PetriNetUnfolderBase]: 12/61 cut-off events. [2025-03-09 00:53:08,847 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2025-03-09 00:53:08,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120 conditions, 61 events. 12/61 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 109 event pairs, 5 based on Foata normal form. 2/60 useless extension candidates. Maximal degree in co-relation 101. Up to 30 conditions per place. [2025-03-09 00:53:08,848 INFO L140 encePairwiseOnDemand]: 37/43 looper letters, 19 selfloop transitions, 4 changer transitions 0/35 dead transitions. [2025-03-09 00:53:08,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 35 transitions, 136 flow [2025-03-09 00:53:08,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-09 00:53:08,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-09 00:53:08,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 101 transitions. [2025-03-09 00:53:08,850 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5872093023255814 [2025-03-09 00:53:08,851 INFO L175 Difference]: Start difference. First operand has 37 places, 33 transitions, 86 flow. Second operand 4 states and 101 transitions. [2025-03-09 00:53:08,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 35 transitions, 136 flow [2025-03-09 00:53:08,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 35 transitions, 135 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-09 00:53:08,852 INFO L231 Difference]: Finished difference. Result has 39 places, 32 transitions, 96 flow [2025-03-09 00:53:08,853 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=83, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=96, PETRI_PLACES=39, PETRI_TRANSITIONS=32} [2025-03-09 00:53:08,854 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, -3 predicate places. [2025-03-09 00:53:08,854 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 32 transitions, 96 flow [2025-03-09 00:53:08,854 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 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 00:53:08,856 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 00:53:08,856 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 00:53:08,856 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-03-09 00:53:08,856 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-03-09 00:53:08,857 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 00:53:08,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1513039259, now seen corresponding path program 1 times [2025-03-09 00:53:08,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 00:53:08,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400169093] [2025-03-09 00:53:08,857 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 00:53:08,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 00:53:08,864 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-03-09 00:53:08,870 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-03-09 00:53:08,871 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 00:53:08,871 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 00:53:08,995 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 00:53:08,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 00:53:08,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400169093] [2025-03-09 00:53:08,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400169093] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 00:53:08,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833939517] [2025-03-09 00:53:08,997 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 00:53:08,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 00:53:08,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 00:53:09,000 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 00:53:09,002 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 00:53:09,046 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-03-09 00:53:09,062 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-03-09 00:53:09,062 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 00:53:09,062 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 00:53:09,068 INFO L256 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-03-09 00:53:09,071 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 00:53:09,139 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2025-03-09 00:53:09,140 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2025-03-09 00:53:09,160 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-03-09 00:53:09,160 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2025-03-09 00:53:09,307 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 00:53:09,307 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 00:53:09,441 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 00:53:09,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833939517] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 00:53:09,441 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-09 00:53:09,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 11 [2025-03-09 00:53:09,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623483659] [2025-03-09 00:53:09,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-09 00:53:09,443 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-09 00:53:09,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 00:53:09,443 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-09 00:53:09,443 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2025-03-09 00:53:09,677 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2025-03-09 00:53:09,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 32 transitions, 96 flow. Second operand has 13 states, 13 states have (on average 18.23076923076923) internal successors, (237), 13 states have internal predecessors, (237), 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 00:53:09,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 00:53:09,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2025-03-09 00:53:09,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 00:53:09,842 INFO L124 PetriNetUnfolderBase]: 30/120 cut-off events. [2025-03-09 00:53:09,842 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2025-03-09 00:53:09,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 252 conditions, 120 events. 30/120 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 214 event pairs, 6 based on Foata normal form. 12/132 useless extension candidates. Maximal degree in co-relation 230. Up to 35 conditions per place. [2025-03-09 00:53:09,843 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 30 selfloop transitions, 11 changer transitions 0/50 dead transitions. [2025-03-09 00:53:09,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 50 transitions, 220 flow [2025-03-09 00:53:09,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-09 00:53:09,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-09 00:53:09,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 152 transitions. [2025-03-09 00:53:09,845 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5049833887043189 [2025-03-09 00:53:09,845 INFO L175 Difference]: Start difference. First operand has 39 places, 32 transitions, 96 flow. Second operand 7 states and 152 transitions. [2025-03-09 00:53:09,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 50 transitions, 220 flow [2025-03-09 00:53:09,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 50 transitions, 212 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-09 00:53:09,846 INFO L231 Difference]: Finished difference. Result has 45 places, 36 transitions, 150 flow [2025-03-09 00:53:09,846 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=150, PETRI_PLACES=45, PETRI_TRANSITIONS=36} [2025-03-09 00:53:09,847 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 3 predicate places. [2025-03-09 00:53:09,847 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 36 transitions, 150 flow [2025-03-09 00:53:09,847 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 18.23076923076923) internal successors, (237), 13 states have internal predecessors, (237), 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 00:53:09,847 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 00:53:09,847 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 00:53:09,853 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 00:53:10,047 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2025-03-09 00:53:10,048 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-03-09 00:53:10,049 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 00:53:10,049 INFO L85 PathProgramCache]: Analyzing trace with hash -1963179907, now seen corresponding path program 1 times [2025-03-09 00:53:10,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 00:53:10,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964907664] [2025-03-09 00:53:10,049 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 00:53:10,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 00:53:10,054 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-03-09 00:53:10,057 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-03-09 00:53:10,057 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 00:53:10,057 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 00:53:10,130 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 00:53:10,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 00:53:10,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964907664] [2025-03-09 00:53:10,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964907664] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 00:53:10,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122608210] [2025-03-09 00:53:10,131 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 00:53:10,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 00:53:10,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 00:53:10,133 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 00:53:10,136 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 00:53:10,193 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-03-09 00:53:10,207 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-03-09 00:53:10,207 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 00:53:10,207 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 00:53:10,208 INFO L256 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-03-09 00:53:10,209 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 00:53:10,215 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2025-03-09 00:53:10,294 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 00:53:10,294 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 00:53:10,373 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 00:53:10,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122608210] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 00:53:10,373 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-09 00:53:10,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2025-03-09 00:53:10,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845970609] [2025-03-09 00:53:10,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-09 00:53:10,374 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-09 00:53:10,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 00:53:10,374 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-09 00:53:10,375 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2025-03-09 00:53:10,460 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 43 [2025-03-09 00:53:10,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 36 transitions, 150 flow. Second operand has 11 states, 11 states have (on average 20.727272727272727) internal successors, (228), 11 states have internal predecessors, (228), 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 00:53:10,461 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 00:53:10,461 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 43 [2025-03-09 00:53:10,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 00:53:10,562 INFO L124 PetriNetUnfolderBase]: 25/111 cut-off events. [2025-03-09 00:53:10,562 INFO L125 PetriNetUnfolderBase]: For 99/99 co-relation queries the response was YES. [2025-03-09 00:53:10,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 265 conditions, 111 events. 25/111 cut-off events. For 99/99 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 179 event pairs, 4 based on Foata normal form. 6/115 useless extension candidates. Maximal degree in co-relation 240. Up to 29 conditions per place. [2025-03-09 00:53:10,563 INFO L140 encePairwiseOnDemand]: 37/43 looper letters, 26 selfloop transitions, 11 changer transitions 0/48 dead transitions. [2025-03-09 00:53:10,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 48 transitions, 248 flow [2025-03-09 00:53:10,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-09 00:53:10,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-09 00:53:10,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2025-03-09 00:53:10,564 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5514950166112956 [2025-03-09 00:53:10,566 INFO L175 Difference]: Start difference. First operand has 45 places, 36 transitions, 150 flow. Second operand 7 states and 166 transitions. [2025-03-09 00:53:10,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 48 transitions, 248 flow [2025-03-09 00:53:10,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 48 transitions, 232 flow, removed 6 selfloop flow, removed 2 redundant places. [2025-03-09 00:53:10,568 INFO L231 Difference]: Finished difference. Result has 53 places, 37 transitions, 184 flow [2025-03-09 00:53:10,568 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=184, PETRI_PLACES=53, PETRI_TRANSITIONS=37} [2025-03-09 00:53:10,568 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 11 predicate places. [2025-03-09 00:53:10,568 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 37 transitions, 184 flow [2025-03-09 00:53:10,570 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 20.727272727272727) internal successors, (228), 11 states have internal predecessors, (228), 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 00:53:10,570 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 00:53:10,570 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 00:53:10,576 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-09 00:53:10,770 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,SelfDestructingSolverStorable6 [2025-03-09 00:53:10,771 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-03-09 00:53:10,771 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 00:53:10,771 INFO L85 PathProgramCache]: Analyzing trace with hash -977748114, now seen corresponding path program 1 times [2025-03-09 00:53:10,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 00:53:10,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034458522] [2025-03-09 00:53:10,771 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 00:53:10,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 00:53:10,776 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-09 00:53:10,783 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-09 00:53:10,783 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 00:53:10,783 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 00:53:10,977 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 00:53:10,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 00:53:10,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034458522] [2025-03-09 00:53:10,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034458522] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 00:53:10,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 00:53:10,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-09 00:53:10,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948639002] [2025-03-09 00:53:10,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 00:53:10,978 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-09 00:53:10,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 00:53:10,978 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-09 00:53:10,978 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2025-03-09 00:53:11,011 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 43 [2025-03-09 00:53:11,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 37 transitions, 184 flow. Second operand has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 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 00:53:11,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 00:53:11,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 43 [2025-03-09 00:53:11,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 00:53:11,085 INFO L124 PetriNetUnfolderBase]: 21/109 cut-off events. [2025-03-09 00:53:11,085 INFO L125 PetriNetUnfolderBase]: For 140/140 co-relation queries the response was YES. [2025-03-09 00:53:11,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 293 conditions, 109 events. 21/109 cut-off events. For 140/140 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 178 event pairs, 12 based on Foata normal form. 2/111 useless extension candidates. Maximal degree in co-relation 264. Up to 51 conditions per place. [2025-03-09 00:53:11,086 INFO L140 encePairwiseOnDemand]: 38/43 looper letters, 23 selfloop transitions, 5 changer transitions 0/41 dead transitions. [2025-03-09 00:53:11,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 41 transitions, 240 flow [2025-03-09 00:53:11,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-09 00:53:11,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-09 00:53:11,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 139 transitions. [2025-03-09 00:53:11,087 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5387596899224806 [2025-03-09 00:53:11,087 INFO L175 Difference]: Start difference. First operand has 53 places, 37 transitions, 184 flow. Second operand 6 states and 139 transitions. [2025-03-09 00:53:11,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 41 transitions, 240 flow [2025-03-09 00:53:11,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 41 transitions, 227 flow, removed 0 selfloop flow, removed 5 redundant places. [2025-03-09 00:53:11,089 INFO L231 Difference]: Finished difference. Result has 54 places, 38 transitions, 181 flow [2025-03-09 00:53:11,089 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=161, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=181, PETRI_PLACES=54, PETRI_TRANSITIONS=38} [2025-03-09 00:53:11,090 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 12 predicate places. [2025-03-09 00:53:11,090 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 38 transitions, 181 flow [2025-03-09 00:53:11,090 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 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 00:53:11,090 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 00:53:11,090 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 00:53:11,090 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2025-03-09 00:53:11,091 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-03-09 00:53:11,091 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 00:53:11,091 INFO L85 PathProgramCache]: Analyzing trace with hash 697377793, now seen corresponding path program 1 times [2025-03-09 00:53:11,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 00:53:11,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775492807] [2025-03-09 00:53:11,091 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 00:53:11,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 00:53:11,097 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-03-09 00:53:11,103 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-03-09 00:53:11,103 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 00:53:11,103 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 00:53:11,265 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 00:53:11,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 00:53:11,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775492807] [2025-03-09 00:53:11,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775492807] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 00:53:11,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13021386] [2025-03-09 00:53:11,266 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 00:53:11,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 00:53:11,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 00:53:11,268 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 00:53:11,269 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 00:53:11,309 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-03-09 00:53:11,325 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-03-09 00:53:11,326 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 00:53:11,326 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 00:53:11,326 INFO L256 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-03-09 00:53:11,328 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 00:53:11,430 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-09 00:53:11,445 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 00:53:11,445 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 00:53:11,503 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 00:53:11,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13021386] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 00:53:11,503 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-09 00:53:11,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2025-03-09 00:53:11,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79811248] [2025-03-09 00:53:11,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-09 00:53:11,504 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-09 00:53:11,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 00:53:11,504 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-09 00:53:11,504 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2025-03-09 00:53:11,643 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 43 [2025-03-09 00:53:11,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 38 transitions, 181 flow. Second operand has 14 states, 14 states have (on average 23.142857142857142) internal successors, (324), 14 states have internal predecessors, (324), 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 00:53:11,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 00:53:11,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 43 [2025-03-09 00:53:11,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 00:53:11,754 INFO L124 PetriNetUnfolderBase]: 18/104 cut-off events. [2025-03-09 00:53:11,754 INFO L125 PetriNetUnfolderBase]: For 111/111 co-relation queries the response was YES. [2025-03-09 00:53:11,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 285 conditions, 104 events. 18/104 cut-off events. For 111/111 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 170 event pairs, 9 based on Foata normal form. 2/106 useless extension candidates. Maximal degree in co-relation 252. Up to 40 conditions per place. [2025-03-09 00:53:11,755 INFO L140 encePairwiseOnDemand]: 38/43 looper letters, 23 selfloop transitions, 6 changer transitions 0/42 dead transitions. [2025-03-09 00:53:11,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 42 transitions, 242 flow [2025-03-09 00:53:11,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-09 00:53:11,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-09 00:53:11,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2025-03-09 00:53:11,756 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5581395348837209 [2025-03-09 00:53:11,756 INFO L175 Difference]: Start difference. First operand has 54 places, 38 transitions, 181 flow. Second operand 7 states and 168 transitions. [2025-03-09 00:53:11,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 42 transitions, 242 flow [2025-03-09 00:53:11,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 42 transitions, 239 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-09 00:53:11,757 INFO L231 Difference]: Finished difference. Result has 60 places, 38 transitions, 193 flow [2025-03-09 00:53:11,757 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=169, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=193, PETRI_PLACES=60, PETRI_TRANSITIONS=38} [2025-03-09 00:53:11,758 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 18 predicate places. [2025-03-09 00:53:11,758 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 38 transitions, 193 flow [2025-03-09 00:53:11,758 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 23.142857142857142) internal successors, (324), 14 states have internal predecessors, (324), 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 00:53:11,758 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 00:53:11,758 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 00:53:11,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-09 00:53:11,958 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 00:53:11,959 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-03-09 00:53:11,959 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 00:53:11,959 INFO L85 PathProgramCache]: Analyzing trace with hash -1378674772, now seen corresponding path program 2 times [2025-03-09 00:53:11,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 00:53:11,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778855695] [2025-03-09 00:53:11,959 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-09 00:53:11,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 00:53:11,967 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 35 statements into 2 equivalence classes. [2025-03-09 00:53:11,984 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 35 of 35 statements. [2025-03-09 00:53:11,987 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-09 00:53:11,987 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 00:53:12,488 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 00:53:12,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 00:53:12,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778855695] [2025-03-09 00:53:12,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778855695] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 00:53:12,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32821636] [2025-03-09 00:53:12,489 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-09 00:53:12,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 00:53:12,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 00:53:12,491 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 00:53:12,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-09 00:53:12,532 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 35 statements into 2 equivalence classes. [2025-03-09 00:53:12,554 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 35 of 35 statements. [2025-03-09 00:53:12,554 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-09 00:53:12,554 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 00:53:12,555 INFO L256 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-03-09 00:53:12,560 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 00:53:12,715 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-09 00:53:12,731 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 00:53:12,731 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 00:53:12,813 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 00:53:12,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32821636] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 00:53:12,813 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-09 00:53:12,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6, 6] total 21 [2025-03-09 00:53:12,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708990357] [2025-03-09 00:53:12,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-09 00:53:12,814 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-03-09 00:53:12,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 00:53:12,814 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-03-09 00:53:12,814 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2025-03-09 00:53:13,289 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 43 [2025-03-09 00:53:13,289 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 38 transitions, 193 flow. Second operand has 22 states, 22 states have (on average 19.363636363636363) internal successors, (426), 22 states have internal predecessors, (426), 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 00:53:13,289 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 00:53:13,289 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 43 [2025-03-09 00:53:13,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 00:53:13,599 INFO L124 PetriNetUnfolderBase]: 25/111 cut-off events. [2025-03-09 00:53:13,600 INFO L125 PetriNetUnfolderBase]: For 154/154 co-relation queries the response was YES. [2025-03-09 00:53:13,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 333 conditions, 111 events. 25/111 cut-off events. For 154/154 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 148 event pairs, 8 based on Foata normal form. 2/112 useless extension candidates. Maximal degree in co-relation 297. Up to 37 conditions per place. [2025-03-09 00:53:13,601 INFO L140 encePairwiseOnDemand]: 37/43 looper letters, 33 selfloop transitions, 9 changer transitions 0/50 dead transitions. [2025-03-09 00:53:13,601 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 50 transitions, 310 flow [2025-03-09 00:53:13,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-09 00:53:13,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-09 00:53:13,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 203 transitions. [2025-03-09 00:53:13,602 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4720930232558139 [2025-03-09 00:53:13,602 INFO L175 Difference]: Start difference. First operand has 60 places, 38 transitions, 193 flow. Second operand 10 states and 203 transitions. [2025-03-09 00:53:13,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 50 transitions, 310 flow [2025-03-09 00:53:13,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 50 transitions, 298 flow, removed 1 selfloop flow, removed 5 redundant places. [2025-03-09 00:53:13,604 INFO L231 Difference]: Finished difference. Result has 66 places, 38 transitions, 204 flow [2025-03-09 00:53:13,604 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=204, PETRI_PLACES=66, PETRI_TRANSITIONS=38} [2025-03-09 00:53:13,605 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 24 predicate places. [2025-03-09 00:53:13,605 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 38 transitions, 204 flow [2025-03-09 00:53:13,605 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 19.363636363636363) internal successors, (426), 22 states have internal predecessors, (426), 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 00:53:13,605 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 00:53:13,605 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 00:53:13,612 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-03-09 00:53:13,811 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 00:53:13,811 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-03-09 00:53:13,811 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 00:53:13,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1638762672, now seen corresponding path program 2 times [2025-03-09 00:53:13,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 00:53:13,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054249160] [2025-03-09 00:53:13,812 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-09 00:53:13,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 00:53:13,818 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 35 statements into 2 equivalence classes. [2025-03-09 00:53:13,824 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 35 of 35 statements. [2025-03-09 00:53:13,826 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-09 00:53:13,826 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 00:53:13,980 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 00:53:13,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 00:53:13,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054249160] [2025-03-09 00:53:13,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054249160] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 00:53:13,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049555142] [2025-03-09 00:53:13,980 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-09 00:53:13,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 00:53:13,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 00:53:13,982 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 00:53:13,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-09 00:53:14,023 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 35 statements into 2 equivalence classes. [2025-03-09 00:53:14,041 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 35 of 35 statements. [2025-03-09 00:53:14,041 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-09 00:53:14,041 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 00:53:14,042 INFO L256 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 23 conjuncts are in the unsatisfiable core [2025-03-09 00:53:14,043 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 00:53:14,070 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2025-03-09 00:53:14,071 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2025-03-09 00:53:14,080 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-03-09 00:53:14,080 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2025-03-09 00:53:14,308 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 00:53:14,309 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 00:53:14,548 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 00:53:14,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049555142] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 00:53:14,548 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-09 00:53:14,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 20 [2025-03-09 00:53:14,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843458666] [2025-03-09 00:53:14,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-09 00:53:14,550 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-03-09 00:53:14,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 00:53:14,551 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-03-09 00:53:14,551 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2025-03-09 00:53:14,879 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2025-03-09 00:53:14,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 38 transitions, 204 flow. Second operand has 22 states, 22 states have (on average 18.545454545454547) internal successors, (408), 22 states have internal predecessors, (408), 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 00:53:14,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 00:53:14,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2025-03-09 00:53:14,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 00:53:15,178 INFO L124 PetriNetUnfolderBase]: 48/190 cut-off events. [2025-03-09 00:53:15,178 INFO L125 PetriNetUnfolderBase]: For 409/409 co-relation queries the response was YES. [2025-03-09 00:53:15,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 629 conditions, 190 events. 48/190 cut-off events. For 409/409 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 295 event pairs, 6 based on Foata normal form. 8/198 useless extension candidates. Maximal degree in co-relation 591. Up to 38 conditions per place. [2025-03-09 00:53:15,180 INFO L140 encePairwiseOnDemand]: 37/43 looper letters, 46 selfloop transitions, 16 changer transitions 0/72 dead transitions. [2025-03-09 00:53:15,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 72 transitions, 488 flow [2025-03-09 00:53:15,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-09 00:53:15,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-03-09 00:53:15,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 231 transitions. [2025-03-09 00:53:15,181 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4883720930232558 [2025-03-09 00:53:15,181 INFO L175 Difference]: Start difference. First operand has 66 places, 38 transitions, 204 flow. Second operand 11 states and 231 transitions. [2025-03-09 00:53:15,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 72 transitions, 488 flow [2025-03-09 00:53:15,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 72 transitions, 469 flow, removed 2 selfloop flow, removed 7 redundant places. [2025-03-09 00:53:15,183 INFO L231 Difference]: Finished difference. Result has 74 places, 47 transitions, 326 flow [2025-03-09 00:53:15,183 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=185, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=326, PETRI_PLACES=74, PETRI_TRANSITIONS=47} [2025-03-09 00:53:15,186 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 32 predicate places. [2025-03-09 00:53:15,186 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 47 transitions, 326 flow [2025-03-09 00:53:15,187 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 18.545454545454547) internal successors, (408), 22 states have internal predecessors, (408), 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 00:53:15,187 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 00:53:15,187 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 00:53:15,193 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-03-09 00:53:15,387 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2025-03-09 00:53:15,388 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-03-09 00:53:15,389 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 00:53:15,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1402075378, now seen corresponding path program 2 times [2025-03-09 00:53:15,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 00:53:15,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215903336] [2025-03-09 00:53:15,389 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-09 00:53:15,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 00:53:15,398 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 37 statements into 2 equivalence classes. [2025-03-09 00:53:15,401 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 13 of 37 statements. [2025-03-09 00:53:15,401 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-09 00:53:15,401 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 00:53:15,491 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2025-03-09 00:53:15,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 00:53:15,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215903336] [2025-03-09 00:53:15,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215903336] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 00:53:15,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092576142] [2025-03-09 00:53:15,492 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-09 00:53:15,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 00:53:15,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 00:53:15,494 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 00:53:15,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-09 00:53:15,537 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 37 statements into 2 equivalence classes. [2025-03-09 00:53:15,547 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 13 of 37 statements. [2025-03-09 00:53:15,548 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-09 00:53:15,548 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 00:53:15,549 INFO L256 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-03-09 00:53:15,551 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 00:53:15,579 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2025-03-09 00:53:15,579 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2025-03-09 00:53:15,592 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-03-09 00:53:15,593 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2025-03-09 00:53:15,870 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2025-03-09 00:53:15,871 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 00:53:16,188 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2025-03-09 00:53:16,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092576142] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 00:53:16,188 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-09 00:53:16,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2025-03-09 00:53:16,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466302470] [2025-03-09 00:53:16,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-09 00:53:16,189 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-09 00:53:16,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 00:53:16,189 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-09 00:53:16,189 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2025-03-09 00:53:16,379 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2025-03-09 00:53:16,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 47 transitions, 326 flow. Second operand has 14 states, 14 states have (on average 18.214285714285715) internal successors, (255), 14 states have internal predecessors, (255), 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 00:53:16,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 00:53:16,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2025-03-09 00:53:16,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 00:53:16,522 INFO L124 PetriNetUnfolderBase]: 55/189 cut-off events. [2025-03-09 00:53:16,522 INFO L125 PetriNetUnfolderBase]: For 601/601 co-relation queries the response was YES. [2025-03-09 00:53:16,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 672 conditions, 189 events. 55/189 cut-off events. For 601/601 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 263 event pairs, 2 based on Foata normal form. 8/197 useless extension candidates. Maximal degree in co-relation 629. Up to 80 conditions per place. [2025-03-09 00:53:16,523 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 24 selfloop transitions, 19 changer transitions 0/51 dead transitions. [2025-03-09 00:53:16,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 51 transitions, 414 flow [2025-03-09 00:53:16,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-09 00:53:16,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-09 00:53:16,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 116 transitions. [2025-03-09 00:53:16,525 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4496124031007752 [2025-03-09 00:53:16,525 INFO L175 Difference]: Start difference. First operand has 74 places, 47 transitions, 326 flow. Second operand 6 states and 116 transitions. [2025-03-09 00:53:16,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 51 transitions, 414 flow [2025-03-09 00:53:16,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 51 transitions, 389 flow, removed 0 selfloop flow, removed 8 redundant places. [2025-03-09 00:53:16,529 INFO L231 Difference]: Finished difference. Result has 71 places, 47 transitions, 346 flow [2025-03-09 00:53:16,529 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=291, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=346, PETRI_PLACES=71, PETRI_TRANSITIONS=47} [2025-03-09 00:53:16,529 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 29 predicate places. [2025-03-09 00:53:16,530 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 47 transitions, 346 flow [2025-03-09 00:53:16,530 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 18.214285714285715) internal successors, (255), 14 states have internal predecessors, (255), 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 00:53:16,530 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 00:53:16,531 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 00:53:16,536 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-03-09 00:53:16,731 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 00:53:16,731 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-03-09 00:53:16,732 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 00:53:16,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1663251811, now seen corresponding path program 3 times [2025-03-09 00:53:16,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 00:53:16,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612483637] [2025-03-09 00:53:16,732 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-09 00:53:16,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 00:53:16,738 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 41 statements into 4 equivalence classes. [2025-03-09 00:53:16,754 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 41 of 41 statements. [2025-03-09 00:53:16,756 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-03-09 00:53:16,756 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 00:53:17,064 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 00:53:17,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 00:53:17,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612483637] [2025-03-09 00:53:17,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612483637] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 00:53:17,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507831848] [2025-03-09 00:53:17,064 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-09 00:53:17,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 00:53:17,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 00:53:17,066 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 00:53:17,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-09 00:53:17,108 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 41 statements into 4 equivalence classes. [2025-03-09 00:53:17,137 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 41 of 41 statements. [2025-03-09 00:53:17,138 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-03-09 00:53:17,138 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 00:53:17,138 INFO L256 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-03-09 00:53:17,140 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 00:53:17,305 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-09 00:53:17,316 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 00:53:17,316 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 00:53:17,407 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 00:53:17,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507831848] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 00:53:17,407 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-09 00:53:17,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 20 [2025-03-09 00:53:17,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259460813] [2025-03-09 00:53:17,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-09 00:53:17,407 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-03-09 00:53:17,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 00:53:17,408 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-03-09 00:53:17,408 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2025-03-09 00:53:17,725 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 43 [2025-03-09 00:53:17,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 47 transitions, 346 flow. Second operand has 21 states, 21 states have (on average 22.142857142857142) internal successors, (465), 21 states have internal predecessors, (465), 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 00:53:17,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 00:53:17,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 43 [2025-03-09 00:53:17,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 00:53:17,985 INFO L124 PetriNetUnfolderBase]: 40/172 cut-off events. [2025-03-09 00:53:17,985 INFO L125 PetriNetUnfolderBase]: For 716/716 co-relation queries the response was YES. [2025-03-09 00:53:17,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 628 conditions, 172 events. 40/172 cut-off events. For 716/716 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 239 event pairs, 18 based on Foata normal form. 2/174 useless extension candidates. Maximal degree in co-relation 585. Up to 73 conditions per place. [2025-03-09 00:53:17,986 INFO L140 encePairwiseOnDemand]: 38/43 looper letters, 38 selfloop transitions, 9 changer transitions 0/57 dead transitions. [2025-03-09 00:53:17,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 57 transitions, 473 flow [2025-03-09 00:53:17,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-09 00:53:17,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-09 00:53:17,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 231 transitions. [2025-03-09 00:53:17,987 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5372093023255814 [2025-03-09 00:53:17,987 INFO L175 Difference]: Start difference. First operand has 71 places, 47 transitions, 346 flow. Second operand 10 states and 231 transitions. [2025-03-09 00:53:17,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 57 transitions, 473 flow [2025-03-09 00:53:17,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 57 transitions, 445 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-03-09 00:53:17,993 INFO L231 Difference]: Finished difference. Result has 78 places, 47 transitions, 342 flow [2025-03-09 00:53:17,993 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=308, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=342, PETRI_PLACES=78, PETRI_TRANSITIONS=47} [2025-03-09 00:53:17,994 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 36 predicate places. [2025-03-09 00:53:17,994 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 47 transitions, 342 flow [2025-03-09 00:53:17,994 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 22.142857142857142) internal successors, (465), 21 states have internal predecessors, (465), 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 00:53:17,994 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 00:53:17,994 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 00:53:18,001 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-03-09 00:53:18,194 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 00:53:18,194 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-03-09 00:53:18,195 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 00:53:18,195 INFO L85 PathProgramCache]: Analyzing trace with hash -388082374, now seen corresponding path program 4 times [2025-03-09 00:53:18,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 00:53:18,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166970818] [2025-03-09 00:53:18,195 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-09 00:53:18,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 00:53:18,201 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 47 statements into 2 equivalence classes. [2025-03-09 00:53:18,207 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 47 of 47 statements. [2025-03-09 00:53:18,209 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-09 00:53:18,209 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 00:53:18,441 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 00:53:18,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 00:53:18,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166970818] [2025-03-09 00:53:18,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166970818] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 00:53:18,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685974423] [2025-03-09 00:53:18,441 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-09 00:53:18,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 00:53:18,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 00:53:18,443 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 00:53:18,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-09 00:53:18,488 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 47 statements into 2 equivalence classes. [2025-03-09 00:53:18,511 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 47 of 47 statements. [2025-03-09 00:53:18,511 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-09 00:53:18,512 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 00:53:18,513 INFO L256 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-03-09 00:53:18,514 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 00:53:18,715 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-09 00:53:18,725 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 00:53:18,725 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 00:53:18,854 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 00:53:18,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685974423] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 00:53:18,854 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-09 00:53:18,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 23 [2025-03-09 00:53:18,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38396949] [2025-03-09 00:53:18,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-09 00:53:18,855 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-03-09 00:53:18,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 00:53:18,856 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-03-09 00:53:18,857 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2025-03-09 00:53:19,286 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 43 [2025-03-09 00:53:19,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 47 transitions, 342 flow. Second operand has 24 states, 24 states have (on average 21.583333333333332) internal successors, (518), 24 states have internal predecessors, (518), 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 00:53:19,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 00:53:19,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 43 [2025-03-09 00:53:19,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 00:53:19,529 INFO L124 PetriNetUnfolderBase]: 29/159 cut-off events. [2025-03-09 00:53:19,529 INFO L125 PetriNetUnfolderBase]: For 605/605 co-relation queries the response was YES. [2025-03-09 00:53:19,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 574 conditions, 159 events. 29/159 cut-off events. For 605/605 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 221 event pairs, 12 based on Foata normal form. 2/161 useless extension candidates. Maximal degree in co-relation 531. Up to 51 conditions per place. [2025-03-09 00:53:19,530 INFO L140 encePairwiseOnDemand]: 38/43 looper letters, 31 selfloop transitions, 9 changer transitions 0/54 dead transitions. [2025-03-09 00:53:19,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 54 transitions, 434 flow [2025-03-09 00:53:19,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-09 00:53:19,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-09 00:53:19,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 227 transitions. [2025-03-09 00:53:19,531 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5279069767441861 [2025-03-09 00:53:19,531 INFO L175 Difference]: Start difference. First operand has 78 places, 47 transitions, 342 flow. Second operand 10 states and 227 transitions. [2025-03-09 00:53:19,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 54 transitions, 434 flow [2025-03-09 00:53:19,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 54 transitions, 412 flow, removed 3 selfloop flow, removed 8 redundant places. [2025-03-09 00:53:19,533 INFO L231 Difference]: Finished difference. Result has 81 places, 47 transitions, 344 flow [2025-03-09 00:53:19,534 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=308, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=344, PETRI_PLACES=81, PETRI_TRANSITIONS=47} [2025-03-09 00:53:19,534 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 39 predicate places. [2025-03-09 00:53:19,534 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 47 transitions, 344 flow [2025-03-09 00:53:19,534 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 21.583333333333332) internal successors, (518), 24 states have internal predecessors, (518), 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 00:53:19,534 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 00:53:19,534 INFO L206 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 00:53:19,541 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-03-09 00:53:19,735 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2025-03-09 00:53:19,735 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-03-09 00:53:19,736 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 00:53:19,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1583659487, now seen corresponding path program 5 times [2025-03-09 00:53:19,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 00:53:19,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106569402] [2025-03-09 00:53:19,736 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-09 00:53:19,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 00:53:19,743 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 53 statements into 6 equivalence classes. [2025-03-09 00:53:19,750 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) and asserted 53 of 53 statements. [2025-03-09 00:53:19,750 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2025-03-09 00:53:19,750 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 00:53:19,928 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 00:53:19,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 00:53:19,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106569402] [2025-03-09 00:53:19,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106569402] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 00:53:19,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263327623] [2025-03-09 00:53:19,929 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-09 00:53:19,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 00:53:19,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 00:53:19,931 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 00:53:19,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-09 00:53:19,975 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 53 statements into 6 equivalence classes. [2025-03-09 00:53:20,005 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) and asserted 53 of 53 statements. [2025-03-09 00:53:20,005 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2025-03-09 00:53:20,005 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 00:53:20,007 INFO L256 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-03-09 00:53:20,008 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 00:53:20,259 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-09 00:53:20,270 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 00:53:20,270 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 00:53:20,384 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 00:53:20,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263327623] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 00:53:20,384 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-09 00:53:20,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2025-03-09 00:53:20,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87066928] [2025-03-09 00:53:20,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-09 00:53:20,385 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-03-09 00:53:20,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 00:53:20,385 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-03-09 00:53:20,385 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2025-03-09 00:53:20,877 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 43 [2025-03-09 00:53:20,877 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 47 transitions, 344 flow. Second operand has 26 states, 26 states have (on average 22.615384615384617) internal successors, (588), 26 states have internal predecessors, (588), 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 00:53:20,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 00:53:20,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 43 [2025-03-09 00:53:20,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 00:53:21,132 INFO L124 PetriNetUnfolderBase]: 26/154 cut-off events. [2025-03-09 00:53:21,132 INFO L125 PetriNetUnfolderBase]: For 628/628 co-relation queries the response was YES. [2025-03-09 00:53:21,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 556 conditions, 154 events. 26/154 cut-off events. For 628/628 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 211 event pairs, 9 based on Foata normal form. 2/156 useless extension candidates. Maximal degree in co-relation 511. Up to 40 conditions per place. [2025-03-09 00:53:21,133 INFO L140 encePairwiseOnDemand]: 38/43 looper letters, 31 selfloop transitions, 10 changer transitions 0/55 dead transitions. [2025-03-09 00:53:21,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 55 transitions, 442 flow [2025-03-09 00:53:21,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-09 00:53:21,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-03-09 00:53:21,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 260 transitions. [2025-03-09 00:53:21,135 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5496828752642706 [2025-03-09 00:53:21,135 INFO L175 Difference]: Start difference. First operand has 81 places, 47 transitions, 344 flow. Second operand 11 states and 260 transitions. [2025-03-09 00:53:21,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 55 transitions, 442 flow [2025-03-09 00:53:21,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 55 transitions, 418 flow, removed 4 selfloop flow, removed 8 redundant places. [2025-03-09 00:53:21,137 INFO L231 Difference]: Finished difference. Result has 85 places, 47 transitions, 348 flow [2025-03-09 00:53:21,138 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=308, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=348, PETRI_PLACES=85, PETRI_TRANSITIONS=47} [2025-03-09 00:53:21,139 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 43 predicate places. [2025-03-09 00:53:21,139 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 47 transitions, 348 flow [2025-03-09 00:53:21,139 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 22.615384615384617) internal successors, (588), 26 states have internal predecessors, (588), 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 00:53:21,139 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 00:53:21,139 INFO L206 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 00:53:21,146 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-03-09 00:53:21,342 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2025-03-09 00:53:21,342 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-03-09 00:53:21,343 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 00:53:21,343 INFO L85 PathProgramCache]: Analyzing trace with hash 1889775048, now seen corresponding path program 6 times [2025-03-09 00:53:21,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 00:53:21,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732117788] [2025-03-09 00:53:21,343 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-09 00:53:21,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 00:53:21,349 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 59 statements into 7 equivalence classes. [2025-03-09 00:53:21,363 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) and asserted 59 of 59 statements. [2025-03-09 00:53:21,364 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2025-03-09 00:53:21,364 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 00:53:21,583 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 00:53:21,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 00:53:21,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732117788] [2025-03-09 00:53:21,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732117788] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 00:53:21,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948548526] [2025-03-09 00:53:21,583 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-09 00:53:21,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 00:53:21,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 00:53:21,585 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 00:53:21,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-09 00:53:21,630 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 59 statements into 7 equivalence classes. [2025-03-09 00:53:21,668 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) and asserted 59 of 59 statements. [2025-03-09 00:53:21,668 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2025-03-09 00:53:21,669 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 00:53:21,670 INFO L256 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-09 00:53:21,671 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 00:53:21,963 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-09 00:53:21,974 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 00:53:21,975 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 00:53:22,120 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 00:53:22,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948548526] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 00:53:22,120 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-09 00:53:22,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 28 [2025-03-09 00:53:22,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168121397] [2025-03-09 00:53:22,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-09 00:53:22,121 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2025-03-09 00:53:22,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 00:53:22,121 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2025-03-09 00:53:22,122 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2025-03-09 00:53:22,653 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 43 [2025-03-09 00:53:22,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 47 transitions, 348 flow. Second operand has 29 states, 29 states have (on average 22.551724137931036) internal successors, (654), 29 states have internal predecessors, (654), 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 00:53:22,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 00:53:22,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 43 [2025-03-09 00:53:22,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 00:53:22,962 INFO L124 PetriNetUnfolderBase]: 23/155 cut-off events. [2025-03-09 00:53:22,962 INFO L125 PetriNetUnfolderBase]: For 663/663 co-relation queries the response was YES. [2025-03-09 00:53:22,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 556 conditions, 155 events. 23/155 cut-off events. For 663/663 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 186 event pairs, 6 based on Foata normal form. 2/157 useless extension candidates. Maximal degree in co-relation 509. Up to 31 conditions per place. [2025-03-09 00:53:22,963 INFO L140 encePairwiseOnDemand]: 38/43 looper letters, 31 selfloop transitions, 11 changer transitions 0/56 dead transitions. [2025-03-09 00:53:22,963 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 56 transitions, 452 flow [2025-03-09 00:53:22,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-09 00:53:22,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-03-09 00:53:22,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 283 transitions. [2025-03-09 00:53:22,964 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5484496124031008 [2025-03-09 00:53:22,964 INFO L175 Difference]: Start difference. First operand has 85 places, 47 transitions, 348 flow. Second operand 12 states and 283 transitions. [2025-03-09 00:53:22,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 56 transitions, 452 flow [2025-03-09 00:53:22,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 56 transitions, 424 flow, removed 5 selfloop flow, removed 9 redundant places. [2025-03-09 00:53:22,967 INFO L231 Difference]: Finished difference. Result has 89 places, 47 transitions, 352 flow [2025-03-09 00:53:22,967 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=308, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=352, PETRI_PLACES=89, PETRI_TRANSITIONS=47} [2025-03-09 00:53:22,967 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 47 predicate places. [2025-03-09 00:53:22,967 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 47 transitions, 352 flow [2025-03-09 00:53:22,967 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 22.551724137931036) internal successors, (654), 29 states have internal predecessors, (654), 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 00:53:22,967 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 00:53:22,967 INFO L206 CegarLoopForPetriNet]: trace histogram [9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 00:53:22,974 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-03-09 00:53:23,172 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2025-03-09 00:53:23,172 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-03-09 00:53:23,172 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 00:53:23,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1629687148, now seen corresponding path program 3 times [2025-03-09 00:53:23,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 00:53:23,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420706573] [2025-03-09 00:53:23,173 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-09 00:53:23,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 00:53:23,179 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 59 statements into 9 equivalence classes. [2025-03-09 00:53:23,182 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 17 of 59 statements. [2025-03-09 00:53:23,182 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-09 00:53:23,182 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 00:53:23,302 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2025-03-09 00:53:23,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 00:53:23,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420706573] [2025-03-09 00:53:23,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420706573] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 00:53:23,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919078752] [2025-03-09 00:53:23,303 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-09 00:53:23,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 00:53:23,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 00:53:23,306 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 00:53:23,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-09 00:53:23,351 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 59 statements into 9 equivalence classes. [2025-03-09 00:53:23,362 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 17 of 59 statements. [2025-03-09 00:53:23,362 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-09 00:53:23,362 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 00:53:23,363 INFO L256 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-03-09 00:53:23,365 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 00:53:23,398 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2025-03-09 00:53:23,398 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2025-03-09 00:53:23,405 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-03-09 00:53:23,405 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2025-03-09 00:53:23,896 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-09 00:53:23,896 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2025-03-09 00:53:23,984 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 14 proven. 30 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2025-03-09 00:53:23,984 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 00:53:24,642 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2025-03-09 00:53:24,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919078752] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 00:53:24,642 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-09 00:53:24,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 19 [2025-03-09 00:53:24,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664845195] [2025-03-09 00:53:24,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-09 00:53:24,642 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-03-09 00:53:24,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 00:53:24,643 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-03-09 00:53:24,643 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2025-03-09 00:53:25,097 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2025-03-09 00:53:25,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 47 transitions, 352 flow. Second operand has 21 states, 21 states have (on average 17.714285714285715) internal successors, (372), 21 states have internal predecessors, (372), 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 00:53:25,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 00:53:25,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2025-03-09 00:53:25,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 00:53:25,423 INFO L124 PetriNetUnfolderBase]: 50/180 cut-off events. [2025-03-09 00:53:25,423 INFO L125 PetriNetUnfolderBase]: For 599/599 co-relation queries the response was YES. [2025-03-09 00:53:25,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 650 conditions, 180 events. 50/180 cut-off events. For 599/599 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 203 event pairs, 2 based on Foata normal form. 2/182 useless extension candidates. Maximal degree in co-relation 601. Up to 72 conditions per place. [2025-03-09 00:53:25,424 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 25 selfloop transitions, 23 changer transitions 0/54 dead transitions. [2025-03-09 00:53:25,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 54 transitions, 448 flow [2025-03-09 00:53:25,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-09 00:53:25,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-09 00:53:25,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2025-03-09 00:53:25,425 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2025-03-09 00:53:25,425 INFO L175 Difference]: Start difference. First operand has 89 places, 47 transitions, 352 flow. Second operand 9 states and 168 transitions. [2025-03-09 00:53:25,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 54 transitions, 448 flow [2025-03-09 00:53:25,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 54 transitions, 391 flow, removed 6 selfloop flow, removed 18 redundant places. [2025-03-09 00:53:25,427 INFO L231 Difference]: Finished difference. Result has 78 places, 47 transitions, 327 flow [2025-03-09 00:53:25,428 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=277, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=327, PETRI_PLACES=78, PETRI_TRANSITIONS=47} [2025-03-09 00:53:25,428 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 36 predicate places. [2025-03-09 00:53:25,428 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 47 transitions, 327 flow [2025-03-09 00:53:25,428 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 17.714285714285715) internal successors, (372), 21 states have internal predecessors, (372), 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 00:53:25,428 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 00:53:25,428 INFO L206 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 00:53:25,434 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-03-09 00:53:25,628 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-03-09 00:53:25,629 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-03-09 00:53:25,629 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 00:53:25,629 INFO L85 PathProgramCache]: Analyzing trace with hash 2044315263, now seen corresponding path program 7 times [2025-03-09 00:53:25,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 00:53:25,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140263106] [2025-03-09 00:53:25,629 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-09 00:53:25,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 00:53:25,638 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 65 statements into 1 equivalence classes. [2025-03-09 00:53:25,643 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 65 of 65 statements. [2025-03-09 00:53:25,643 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 00:53:25,643 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-03-09 00:53:25,643 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-03-09 00:53:25,644 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 65 statements into 1 equivalence classes. [2025-03-09 00:53:25,652 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 65 of 65 statements. [2025-03-09 00:53:25,652 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 00:53:25,652 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-03-09 00:53:25,672 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-03-09 00:53:25,672 INFO L340 BasicCegarLoop]: Counterexample is feasible [2025-03-09 00:53:25,673 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (17 of 18 remaining) [2025-03-09 00:53:25,674 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE (16 of 18 remaining) [2025-03-09 00:53:25,674 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE (15 of 18 remaining) [2025-03-09 00:53:25,674 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (14 of 18 remaining) [2025-03-09 00:53:25,675 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (13 of 18 remaining) [2025-03-09 00:53:25,675 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 18 remaining) [2025-03-09 00:53:25,675 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 18 remaining) [2025-03-09 00:53:25,675 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 18 remaining) [2025-03-09 00:53:25,675 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 18 remaining) [2025-03-09 00:53:25,675 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK (8 of 18 remaining) [2025-03-09 00:53:25,675 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 18 remaining) [2025-03-09 00:53:25,675 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 18 remaining) [2025-03-09 00:53:25,675 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE (5 of 18 remaining) [2025-03-09 00:53:25,675 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE (4 of 18 remaining) [2025-03-09 00:53:25,676 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (3 of 18 remaining) [2025-03-09 00:53:25,676 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (2 of 18 remaining) [2025-03-09 00:53:25,676 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 18 remaining) [2025-03-09 00:53:25,676 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 18 remaining) [2025-03-09 00:53:25,676 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2025-03-09 00:53:25,676 INFO L422 BasicCegarLoop]: Path program histogram: [7, 3, 2, 1, 1, 1, 1, 1, 1] [2025-03-09 00:53:25,715 INFO L241 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2025-03-09 00:53:25,715 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2025-03-09 00:53:25,720 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.03 12:53:25 BasicIcfg [2025-03-09 00:53:25,720 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2025-03-09 00:53:25,721 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2025-03-09 00:53:25,721 INFO L270 PluginConnector]: Initializing Witness Printer... [2025-03-09 00:53:25,721 INFO L274 PluginConnector]: Witness Printer initialized [2025-03-09 00:53:25,721 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 09.03 12:53:07" (3/4) ... [2025-03-09 00:53:25,722 INFO L149 WitnessPrinter]: No result that supports witness generation found [2025-03-09 00:53:25,723 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2025-03-09 00:53:25,723 INFO L158 Benchmark]: Toolchain (without parser) took 18968.69ms. Allocated memory was 167.8MB in the beginning and 293.6MB in the end (delta: 125.8MB). Free memory was 130.4MB in the beginning and 217.1MB in the end (delta: -86.7MB). Peak memory consumption was 41.4MB. Max. memory is 16.1GB. [2025-03-09 00:53:25,723 INFO L158 Benchmark]: CDTParser took 0.42ms. Allocated memory is still 201.3MB. Free memory is still 125.3MB. There was no memory consumed. Max. memory is 16.1GB. [2025-03-09 00:53:25,724 INFO L158 Benchmark]: CACSL2BoogieTranslator took 421.71ms. Allocated memory is still 167.8MB. Free memory was 130.4MB in the beginning and 98.7MB in the end (delta: 31.7MB). Peak memory consumption was 33.6MB. Max. memory is 16.1GB. [2025-03-09 00:53:25,724 INFO L158 Benchmark]: Boogie Procedure Inliner took 34.15ms. Allocated memory is still 167.8MB. Free memory was 98.7MB in the beginning and 96.6MB in the end (delta: 2.1MB). There was no memory consumed. Max. memory is 16.1GB. [2025-03-09 00:53:25,724 INFO L158 Benchmark]: Boogie Preprocessor took 24.94ms. Allocated memory is still 167.8MB. Free memory was 96.6MB in the beginning and 94.9MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. [2025-03-09 00:53:25,724 INFO L158 Benchmark]: IcfgBuilder took 361.90ms. Allocated memory is still 167.8MB. Free memory was 94.9MB in the beginning and 71.1MB in the end (delta: 23.8MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2025-03-09 00:53:25,724 INFO L158 Benchmark]: TraceAbstraction took 18116.18ms. Allocated memory was 167.8MB in the beginning and 293.6MB in the end (delta: 125.8MB). Free memory was 70.7MB in the beginning and 217.2MB in the end (delta: -146.4MB). There was no memory consumed. Max. memory is 16.1GB. [2025-03-09 00:53:25,724 INFO L158 Benchmark]: Witness Printer took 2.24ms. Allocated memory is still 293.6MB. Free memory was 217.2MB in the beginning and 217.1MB in the end (delta: 92.3kB). There was no memory consumed. Max. memory is 16.1GB. [2025-03-09 00:53:25,725 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.42ms. Allocated memory is still 201.3MB. Free memory is still 125.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 421.71ms. Allocated memory is still 167.8MB. Free memory was 130.4MB in the beginning and 98.7MB in the end (delta: 31.7MB). Peak memory consumption was 33.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 34.15ms. Allocated memory is still 167.8MB. Free memory was 98.7MB in the beginning and 96.6MB in the end (delta: 2.1MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 24.94ms. Allocated memory is still 167.8MB. Free memory was 96.6MB in the beginning and 94.9MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. * IcfgBuilder took 361.90ms. Allocated memory is still 167.8MB. Free memory was 94.9MB in the beginning and 71.1MB in the end (delta: 23.8MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * TraceAbstraction took 18116.18ms. Allocated memory was 167.8MB in the beginning and 293.6MB in the end (delta: 125.8MB). Free memory was 70.7MB in the beginning and 217.2MB in the end (delta: -146.4MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 2.24ms. Allocated memory is still 293.6MB. Free memory was 217.2MB in the beginning and 217.1MB in the end (delta: 92.3kB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 1119]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 1119. Possible FailurePath: [L1108] 0 char *v; [L1121] 0 pthread_t t1, t2; [L1122] FCALL, FORK 0 pthread_create(&t1, 0, thread1, 0) VAL [\old(arg)={0:0}, t1=-2, v={0:0}] [L1111] 1 v = malloc(sizeof(char) * 8) [L1112] 1 return 0; [L1123] FCALL, JOIN 1 pthread_join(t1, 0) VAL [\old(arg)={0:0}, \result={0:0}, arg={0:0}, t1=-2, v={-3:0}] [L1124] FCALL, FORK 0 pthread_create(&t2, 0, thread2, 0) VAL [\old(arg)={0:0}, \result={0:0}, arg={0:0}, t1=-2, t2=-1, v={-3:0}] [L1116] COND TRUE 2 \read(*v) [L1116] FCALL 2 strcpy(v, "Bigshot") [L1117] 2 return 0; [L1125] FCALL, JOIN 2 pthread_join(t2, 0) VAL [\old(arg)={0:0}, \result={0:0}, arg={0:0}, t1=-2, t2=-1, v={-3:0}] [L1126] EXPR 0 v[0] [L1126] CALL 0 __VERIFIER_assert(v[0] == 'B') [L1107] COND FALSE 0 !(!expression) VAL [\old(arg)={0:0}, \old(expression)=1, \result={0:0}, arg={0:0}, expression=1, v={-3:0}] [L1126] RET 0 __VERIFIER_assert(v[0] == 'B') [L1127] 0 return 0; VAL [\old(arg)={0:0}, \result=0, \result={0:0}, arg={0:0}, t1=-2, t2=-1, v={-3:0}] - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 20]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 1122]: Unable to prove that petrification did provide enough thread instances (tool internal message) Unable to prove that petrification did provide enough thread instances (tool internal message) Reason: Not analyzed. - UnprovableResult [Line: 1124]: Unable to prove that petrification did provide enough thread instances (tool internal message) Unable to prove that petrification did provide enough thread instances (tool internal message) Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 60 locations, 67 edges, 18 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 18.0s, OverallIterations: 18, TraceHistogramMax: 9, PathProgramHistogramMax: 7, EmptinessCheckTime: 0.0s, AutomataDifference: 6.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2894 SdHoareTripleChecker+Valid, 5.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2608 mSDsluCounter, 2880 SdHoareTripleChecker+Invalid, 4.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2868 mSDsCounter, 73 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 14137 IncrementalHoareTripleChecker+Invalid, 14210 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 73 mSolverCounterUnsat, 12 mSDtfsCounter, 14137 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1016 GetRequests, 731 SyntacticMatches, 0 SemanticMatches, 285 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1285 ImplicationChecksByTransitivity, 3.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=352occurred in iteration=16, InterpolantAutomatonStates: 125, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 7.7s InterpolantComputationTime, 1009 NumberOfCodeBlocks, 877 NumberOfCodeBlocksAsserted, 65 NumberOfCheckSat, 1336 ConstructedInterpolants, 65 QuantifiedInterpolants, 19809 SizeOfPredicates, 42 NumberOfNonLiveVariables, 2161 ConjunctsInSsa, 196 ConjunctsInUnsatCore, 39 InterpolantComputations, 6 PerfectInterpolantSequences, 566/1866 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available, ConComCheckerStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2025-03-09 00:53:25,738 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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/pthread/bigshot_s2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.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 fa644cc26c2bb4f900e6af52233648196eb4dff503d36a50559ddcf2a4270ffb --- Real Ultimate output --- This is Ultimate 0.3.0-?-e2fb8be-m [2025-03-09 00:53:27,507 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-09 00:53:27,570 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2025-03-09 00:53:27,574 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-09 00:53:27,577 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-09 00:53:27,620 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-09 00:53:27,627 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-09 00:53:27,627 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-09 00:53:27,628 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-09 00:53:27,628 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-09 00:53:27,629 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-09 00:53:27,629 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-09 00:53:27,629 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-09 00:53:27,629 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-09 00:53:27,630 INFO L153 SettingsManager]: * Use SBE=true [2025-03-09 00:53:27,630 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-09 00:53:27,630 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-09 00:53:27,630 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-09 00:53:27,630 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-09 00:53:27,630 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-09 00:53:27,630 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-03-09 00:53:27,630 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-03-09 00:53:27,630 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-03-09 00:53:27,630 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-09 00:53:27,631 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-03-09 00:53:27,631 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2025-03-09 00:53:27,631 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2025-03-09 00:53:27,631 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-03-09 00:53:27,631 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-09 00:53:27,631 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-09 00:53:27,631 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-09 00:53:27,631 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-09 00:53:27,631 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-09 00:53:27,631 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-09 00:53:27,631 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-09 00:53:27,631 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-09 00:53:27,631 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-09 00:53:27,631 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-09 00:53:27,631 INFO L153 SettingsManager]: * Trace refinement strategy=FOX [2025-03-09 00:53:27,631 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2025-03-09 00:53:27,631 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-09 00:53:27,631 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-09 00:53:27,631 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-09 00:53:27,631 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-09 00:53:27,632 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 -> fa644cc26c2bb4f900e6af52233648196eb4dff503d36a50559ddcf2a4270ffb [2025-03-09 00:53:27,847 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-09 00:53:27,855 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-09 00:53:27,856 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-09 00:53:27,857 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-09 00:53:27,857 INFO L274 PluginConnector]: CDTParser initialized [2025-03-09 00:53:27,860 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread/bigshot_s2.i [2025-03-09 00:53:29,013 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/09084fd02/5a3318d1d65d4fa79c76ca1c176c75db/FLAG36df4125e [2025-03-09 00:53:29,259 INFO L384 CDTParser]: Found 1 translation units. [2025-03-09 00:53:29,260 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/bigshot_s2.i [2025-03-09 00:53:29,277 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/09084fd02/5a3318d1d65d4fa79c76ca1c176c75db/FLAG36df4125e [2025-03-09 00:53:29,291 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/09084fd02/5a3318d1d65d4fa79c76ca1c176c75db [2025-03-09 00:53:29,295 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-09 00:53:29,296 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-09 00:53:29,298 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-09 00:53:29,298 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-09 00:53:29,301 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-09 00:53:29,302 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.03 12:53:29" (1/1) ... [2025-03-09 00:53:29,303 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4387c85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 12:53:29, skipping insertion in model container [2025-03-09 00:53:29,304 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.03 12:53:29" (1/1) ... [2025-03-09 00:53:29,341 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-09 00:53:29,613 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-09 00:53:29,622 INFO L200 MainTranslator]: Completed pre-run [2025-03-09 00:53:29,661 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-09 00:53:29,703 INFO L204 MainTranslator]: Completed translation [2025-03-09 00:53:29,703 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 12:53:29 WrapperNode [2025-03-09 00:53:29,703 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-09 00:53:29,704 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-09 00:53:29,704 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-09 00:53:29,704 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-09 00:53:29,708 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 12:53:29" (1/1) ... [2025-03-09 00:53:29,728 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 12:53:29" (1/1) ... [2025-03-09 00:53:29,745 INFO L138 Inliner]: procedures = 323, calls = 24, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 64 [2025-03-09 00:53:29,745 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-09 00:53:29,746 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-09 00:53:29,746 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-09 00:53:29,746 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-09 00:53:29,752 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 12:53:29" (1/1) ... [2025-03-09 00:53:29,752 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 12:53:29" (1/1) ... [2025-03-09 00:53:29,754 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 12:53:29" (1/1) ... [2025-03-09 00:53:29,768 INFO L175 MemorySlicer]: Split 13 memory accesses to 3 slices as follows [2, 9, 2]. 69 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 8, 0]. The 1 writes are split as follows [0, 0, 1]. [2025-03-09 00:53:29,771 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 12:53:29" (1/1) ... [2025-03-09 00:53:29,772 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 12:53:29" (1/1) ... [2025-03-09 00:53:29,776 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 12:53:29" (1/1) ... [2025-03-09 00:53:29,776 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 12:53:29" (1/1) ... [2025-03-09 00:53:29,778 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 12:53:29" (1/1) ... [2025-03-09 00:53:29,778 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 12:53:29" (1/1) ... [2025-03-09 00:53:29,780 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-09 00:53:29,780 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-09 00:53:29,780 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-09 00:53:29,780 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-09 00:53:29,781 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 12:53:29" (1/1) ... [2025-03-09 00:53:29,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-09 00:53:29,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 00:53:29,805 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 00:53:29,808 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 00:53:29,824 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1#0 [2025-03-09 00:53:29,824 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1#1 [2025-03-09 00:53:29,824 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1#2 [2025-03-09 00:53:29,824 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2025-03-09 00:53:29,824 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2025-03-09 00:53:29,824 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#2 [2025-03-09 00:53:29,824 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-03-09 00:53:29,825 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-03-09 00:53:29,825 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-03-09 00:53:29,825 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-03-09 00:53:29,825 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1#0 [2025-03-09 00:53:29,825 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1#1 [2025-03-09 00:53:29,825 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1#2 [2025-03-09 00:53:29,825 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-03-09 00:53:29,825 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-09 00:53:29,825 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-09 00:53:29,825 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-09 00:53:29,826 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 00:53:29,935 INFO L256 CfgBuilder]: Building ICFG [2025-03-09 00:53:29,937 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-09 00:53:30,160 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-09 00:53:30,160 INFO L307 CfgBuilder]: Performing block encoding [2025-03-09 00:53:30,291 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-09 00:53:30,293 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-09 00:53:30,294 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 09.03 12:53:30 BoogieIcfgContainer [2025-03-09 00:53:30,294 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-09 00:53:30,295 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-09 00:53:30,296 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-09 00:53:30,301 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-09 00:53:30,301 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.03 12:53:29" (1/3) ... [2025-03-09 00:53:30,302 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cba5019 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.03 12:53:30, skipping insertion in model container [2025-03-09 00:53:30,302 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 12:53:29" (2/3) ... [2025-03-09 00:53:30,302 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cba5019 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.03 12:53:30, skipping insertion in model container [2025-03-09 00:53:30,302 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 09.03 12:53:30" (3/3) ... [2025-03-09 00:53:30,303 INFO L128 eAbstractionObserver]: Analyzing ICFG bigshot_s2.i [2025-03-09 00:53:30,313 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-09 00:53:30,314 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG bigshot_s2.i that has 3 procedures, 39 locations, 1 initial locations, 1 loop locations, and 10 error locations. [2025-03-09 00:53:30,314 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-09 00:53:30,355 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-03-09 00:53:30,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 45 places, 43 transitions, 100 flow [2025-03-09 00:53:30,407 INFO L124 PetriNetUnfolderBase]: 5/41 cut-off events. [2025-03-09 00:53:30,410 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-03-09 00:53:30,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50 conditions, 41 events. 5/41 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 78 event pairs, 0 based on Foata normal form. 0/26 useless extension candidates. Maximal degree in co-relation 39. Up to 2 conditions per place. [2025-03-09 00:53:30,412 INFO L82 GeneralOperation]: Start removeDead. Operand has 45 places, 43 transitions, 100 flow [2025-03-09 00:53:30,415 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 40 transitions, 92 flow [2025-03-09 00:53:30,421 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-09 00:53:30,429 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;@6483839f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-09 00:53:30,429 INFO L334 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2025-03-09 00:53:30,436 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-09 00:53:30,436 INFO L124 PetriNetUnfolderBase]: 0/13 cut-off events. [2025-03-09 00:53:30,436 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-03-09 00:53:30,436 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 00:53:30,436 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 00:53:30,437 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-03-09 00:53:30,443 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 00:53:30,443 INFO L85 PathProgramCache]: Analyzing trace with hash 982297594, now seen corresponding path program 1 times [2025-03-09 00:53:30,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-09 00:53:30,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1354118968] [2025-03-09 00:53:30,450 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 00:53:30,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 00:53:30,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 00:53:30,452 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 00:53:30,454 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 00:53:30,525 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-09 00:53:30,538 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-09 00:53:30,539 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 00:53:30,539 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 00:53:30,542 INFO L256 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-03-09 00:53:30,545 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 00:53:30,641 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2025-03-09 00:53:30,642 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2025-03-09 00:53:30,682 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 00:53:30,684 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-09 00:53:30,685 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-09 00:53:30,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354118968] [2025-03-09 00:53:30,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354118968] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 00:53:30,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 00:53:30,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-09 00:53:30,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689432037] [2025-03-09 00:53:30,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 00:53:30,693 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-09 00:53:30,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-09 00:53:30,713 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-09 00:53:30,714 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-09 00:53:30,750 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 43 [2025-03-09 00:53:30,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 40 transitions, 92 flow. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 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 00:53:30,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 00:53:30,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 43 [2025-03-09 00:53:30,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 00:53:30,816 INFO L124 PetriNetUnfolderBase]: 8/54 cut-off events. [2025-03-09 00:53:30,817 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-03-09 00:53:30,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92 conditions, 54 events. 8/54 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 141 event pairs, 2 based on Foata normal form. 4/50 useless extension candidates. Maximal degree in co-relation 71. Up to 20 conditions per place. [2025-03-09 00:53:30,818 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 15 selfloop transitions, 3 changer transitions 0/35 dead transitions. [2025-03-09 00:53:30,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 35 transitions, 118 flow [2025-03-09 00:53:30,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-09 00:53:30,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-09 00:53:30,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 99 transitions. [2025-03-09 00:53:30,830 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5755813953488372 [2025-03-09 00:53:30,831 INFO L175 Difference]: Start difference. First operand has 42 places, 40 transitions, 92 flow. Second operand 4 states and 99 transitions. [2025-03-09 00:53:30,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 35 transitions, 118 flow [2025-03-09 00:53:30,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 35 transitions, 110 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-03-09 00:53:30,838 INFO L231 Difference]: Finished difference. Result has 38 places, 34 transitions, 78 flow [2025-03-09 00:53:30,840 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=78, PETRI_PLACES=38, PETRI_TRANSITIONS=34} [2025-03-09 00:53:30,844 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, -4 predicate places. [2025-03-09 00:53:30,844 INFO L471 AbstractCegarLoop]: Abstraction has has 38 places, 34 transitions, 78 flow [2025-03-09 00:53:30,845 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 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 00:53:30,845 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 00:53:30,845 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 00:53:30,852 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-03-09 00:53:31,046 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 00:53:31,046 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-03-09 00:53:31,047 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 00:53:31,047 INFO L85 PathProgramCache]: Analyzing trace with hash 386454514, now seen corresponding path program 1 times [2025-03-09 00:53:31,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-09 00:53:31,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1703725655] [2025-03-09 00:53:31,047 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 00:53:31,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 00:53:31,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 00:53:31,049 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 00:53:31,050 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 00:53:31,101 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-09 00:53:31,114 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-09 00:53:31,114 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 00:53:31,114 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 00:53:31,116 INFO L256 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-09 00:53:31,117 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 00:53:31,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-09 00:53:31,167 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2025-03-09 00:53:31,233 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 00:53:31,233 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-09 00:53:31,233 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-09 00:53:31,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703725655] [2025-03-09 00:53:31,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703725655] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 00:53:31,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 00:53:31,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-09 00:53:31,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905143911] [2025-03-09 00:53:31,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 00:53:31,235 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-09 00:53:31,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-09 00:53:31,236 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-09 00:53:31,236 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2025-03-09 00:53:31,278 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 43 [2025-03-09 00:53:31,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 34 transitions, 78 flow. Second operand has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 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 00:53:31,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 00:53:31,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 43 [2025-03-09 00:53:31,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 00:53:31,358 INFO L124 PetriNetUnfolderBase]: 16/80 cut-off events. [2025-03-09 00:53:31,359 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2025-03-09 00:53:31,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140 conditions, 80 events. 16/80 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 194 event pairs, 7 based on Foata normal form. 2/70 useless extension candidates. Maximal degree in co-relation 60. Up to 39 conditions per place. [2025-03-09 00:53:31,359 INFO L140 encePairwiseOnDemand]: 37/43 looper letters, 21 selfloop transitions, 4 changer transitions 0/39 dead transitions. [2025-03-09 00:53:31,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 39 transitions, 140 flow [2025-03-09 00:53:31,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-09 00:53:31,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-09 00:53:31,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 99 transitions. [2025-03-09 00:53:31,361 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5755813953488372 [2025-03-09 00:53:31,361 INFO L175 Difference]: Start difference. First operand has 38 places, 34 transitions, 78 flow. Second operand 4 states and 99 transitions. [2025-03-09 00:53:31,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 39 transitions, 140 flow [2025-03-09 00:53:31,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 39 transitions, 132 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-09 00:53:31,363 INFO L231 Difference]: Finished difference. Result has 39 places, 36 transitions, 95 flow [2025-03-09 00:53:31,363 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=95, PETRI_PLACES=39, PETRI_TRANSITIONS=36} [2025-03-09 00:53:31,364 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, -3 predicate places. [2025-03-09 00:53:31,364 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 36 transitions, 95 flow [2025-03-09 00:53:31,364 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 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 00:53:31,364 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 00:53:31,364 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 00:53:31,371 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 00:53:31,568 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 [2025-03-09 00:53:31,568 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-03-09 00:53:31,569 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 00:53:31,569 INFO L85 PathProgramCache]: Analyzing trace with hash -904811779, now seen corresponding path program 1 times [2025-03-09 00:53:31,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-09 00:53:31,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2136540908] [2025-03-09 00:53:31,569 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 00:53:31,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 00:53:31,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 00:53:31,571 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 00:53:31,572 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 00:53:31,619 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-03-09 00:53:31,630 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-03-09 00:53:31,631 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 00:53:31,631 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 00:53:31,632 INFO L256 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-03-09 00:53:31,634 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 00:53:31,639 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 7 [2025-03-09 00:53:31,672 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 00:53:31,672 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-09 00:53:31,672 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-09 00:53:31,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136540908] [2025-03-09 00:53:31,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136540908] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 00:53:31,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 00:53:31,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-09 00:53:31,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164596348] [2025-03-09 00:53:31,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 00:53:31,673 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-09 00:53:31,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-09 00:53:31,673 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-09 00:53:31,673 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-09 00:53:31,697 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 43 [2025-03-09 00:53:31,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 36 transitions, 95 flow. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 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 00:53:31,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 00:53:31,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 43 [2025-03-09 00:53:31,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 00:53:31,763 INFO L124 PetriNetUnfolderBase]: 14/73 cut-off events. [2025-03-09 00:53:31,764 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2025-03-09 00:53:31,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140 conditions, 73 events. 14/73 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 159 event pairs, 1 based on Foata normal form. 0/68 useless extension candidates. Maximal degree in co-relation 45. Up to 20 conditions per place. [2025-03-09 00:53:31,764 INFO L140 encePairwiseOnDemand]: 38/43 looper letters, 18 selfloop transitions, 4 changer transitions 0/36 dead transitions. [2025-03-09 00:53:31,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 36 transitions, 139 flow [2025-03-09 00:53:31,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-09 00:53:31,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-09 00:53:31,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 94 transitions. [2025-03-09 00:53:31,766 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5465116279069767 [2025-03-09 00:53:31,766 INFO L175 Difference]: Start difference. First operand has 39 places, 36 transitions, 95 flow. Second operand 4 states and 94 transitions. [2025-03-09 00:53:31,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 36 transitions, 139 flow [2025-03-09 00:53:31,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 36 transitions, 134 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-09 00:53:31,767 INFO L231 Difference]: Finished difference. Result has 38 places, 34 transitions, 94 flow [2025-03-09 00:53:31,767 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=94, PETRI_PLACES=38, PETRI_TRANSITIONS=34} [2025-03-09 00:53:31,768 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, -4 predicate places. [2025-03-09 00:53:31,768 INFO L471 AbstractCegarLoop]: Abstraction has has 38 places, 34 transitions, 94 flow [2025-03-09 00:53:31,768 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 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 00:53:31,768 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 00:53:31,768 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 00:53:31,774 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-03-09 00:53:31,972 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 00:53:31,972 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-03-09 00:53:31,972 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 00:53:31,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1511827412, now seen corresponding path program 1 times [2025-03-09 00:53:31,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-09 00:53:31,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1041667023] [2025-03-09 00:53:31,973 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 00:53:31,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 00:53:31,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 00:53:31,975 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 00:53:31,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-09 00:53:32,020 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-03-09 00:53:32,029 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-03-09 00:53:32,029 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 00:53:32,029 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 00:53:32,030 INFO L256 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 2 conjuncts are in the unsatisfiable core [2025-03-09 00:53:32,031 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 00:53:32,044 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 00:53:32,044 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-09 00:53:32,044 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-09 00:53:32,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041667023] [2025-03-09 00:53:32,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041667023] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 00:53:32,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 00:53:32,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-09 00:53:32,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577293237] [2025-03-09 00:53:32,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 00:53:32,045 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-09 00:53:32,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-09 00:53:32,045 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-09 00:53:32,045 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-09 00:53:32,051 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 43 [2025-03-09 00:53:32,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 34 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 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 00:53:32,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 00:53:32,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 43 [2025-03-09 00:53:32,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 00:53:32,088 INFO L124 PetriNetUnfolderBase]: 11/64 cut-off events. [2025-03-09 00:53:32,088 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2025-03-09 00:53:32,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128 conditions, 64 events. 11/64 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 138 event pairs, 6 based on Foata normal form. 2/61 useless extension candidates. Maximal degree in co-relation 54. Up to 33 conditions per place. [2025-03-09 00:53:32,089 INFO L140 encePairwiseOnDemand]: 41/43 looper letters, 19 selfloop transitions, 1 changer transitions 0/34 dead transitions. [2025-03-09 00:53:32,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 34 transitions, 134 flow [2025-03-09 00:53:32,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-09 00:53:32,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-09 00:53:32,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 79 transitions. [2025-03-09 00:53:32,089 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6124031007751938 [2025-03-09 00:53:32,090 INFO L175 Difference]: Start difference. First operand has 38 places, 34 transitions, 94 flow. Second operand 3 states and 79 transitions. [2025-03-09 00:53:32,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 34 transitions, 134 flow [2025-03-09 00:53:32,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 34 transitions, 126 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-09 00:53:32,091 INFO L231 Difference]: Finished difference. Result has 37 places, 33 transitions, 86 flow [2025-03-09 00:53:32,091 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=37, PETRI_TRANSITIONS=33} [2025-03-09 00:53:32,091 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, -5 predicate places. [2025-03-09 00:53:32,091 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 33 transitions, 86 flow [2025-03-09 00:53:32,091 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 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 00:53:32,091 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 00:53:32,091 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 00:53:32,100 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-03-09 00:53:32,292 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 00:53:32,292 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-03-09 00:53:32,293 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 00:53:32,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1510865832, now seen corresponding path program 1 times [2025-03-09 00:53:32,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-09 00:53:32,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1459698158] [2025-03-09 00:53:32,293 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 00:53:32,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 00:53:32,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 00:53:32,296 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 00:53:32,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-09 00:53:32,340 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-03-09 00:53:32,354 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-03-09 00:53:32,354 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 00:53:32,354 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 00:53:32,355 INFO L256 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-09 00:53:32,356 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 00:53:32,363 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 00:53:32,432 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 00:53:32,432 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-09 00:53:32,432 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-09 00:53:32,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459698158] [2025-03-09 00:53:32,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459698158] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 00:53:32,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 00:53:32,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-09 00:53:32,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017122398] [2025-03-09 00:53:32,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 00:53:32,433 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-09 00:53:32,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-09 00:53:32,433 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-09 00:53:32,433 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-09 00:53:32,467 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 43 [2025-03-09 00:53:32,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 33 transitions, 86 flow. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 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 00:53:32,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 00:53:32,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 43 [2025-03-09 00:53:32,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 00:53:32,556 INFO L124 PetriNetUnfolderBase]: 12/61 cut-off events. [2025-03-09 00:53:32,556 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2025-03-09 00:53:32,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120 conditions, 61 events. 12/61 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 109 event pairs, 5 based on Foata normal form. 2/60 useless extension candidates. Maximal degree in co-relation 101. Up to 30 conditions per place. [2025-03-09 00:53:32,557 INFO L140 encePairwiseOnDemand]: 37/43 looper letters, 19 selfloop transitions, 4 changer transitions 0/35 dead transitions. [2025-03-09 00:53:32,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 35 transitions, 136 flow [2025-03-09 00:53:32,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-09 00:53:32,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-09 00:53:32,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 101 transitions. [2025-03-09 00:53:32,558 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5872093023255814 [2025-03-09 00:53:32,558 INFO L175 Difference]: Start difference. First operand has 37 places, 33 transitions, 86 flow. Second operand 4 states and 101 transitions. [2025-03-09 00:53:32,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 35 transitions, 136 flow [2025-03-09 00:53:32,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 35 transitions, 135 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-09 00:53:32,559 INFO L231 Difference]: Finished difference. Result has 39 places, 32 transitions, 96 flow [2025-03-09 00:53:32,559 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=83, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=96, PETRI_PLACES=39, PETRI_TRANSITIONS=32} [2025-03-09 00:53:32,559 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, -3 predicate places. [2025-03-09 00:53:32,559 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 32 transitions, 96 flow [2025-03-09 00:53:32,559 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 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 00:53:32,559 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 00:53:32,559 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 00:53:32,566 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-03-09 00:53:32,760 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 00:53:32,760 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-03-09 00:53:32,761 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 00:53:32,761 INFO L85 PathProgramCache]: Analyzing trace with hash -1703074915, now seen corresponding path program 1 times [2025-03-09 00:53:32,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-09 00:53:32,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [476807567] [2025-03-09 00:53:32,761 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 00:53:32,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 00:53:32,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 00:53:32,763 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 00:53:32,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-09 00:53:32,811 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-03-09 00:53:32,823 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-03-09 00:53:32,823 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 00:53:32,823 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 00:53:32,825 INFO L256 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-09 00:53:32,826 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 00:53:32,854 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2025-03-09 00:53:32,854 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2025-03-09 00:53:33,067 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 00:53:33,067 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 00:53:33,207 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 00:53:33,208 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-09 00:53:33,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476807567] [2025-03-09 00:53:33,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476807567] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 00:53:33,208 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-09 00:53:33,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2025-03-09 00:53:33,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713142273] [2025-03-09 00:53:33,208 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-09 00:53:33,208 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-09 00:53:33,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-09 00:53:33,209 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-09 00:53:33,209 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2025-03-09 00:53:33,398 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 43 [2025-03-09 00:53:33,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 32 transitions, 96 flow. Second operand has 10 states, 10 states have (on average 20.4) internal successors, (204), 10 states have internal predecessors, (204), 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 00:53:33,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 00:53:33,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 43 [2025-03-09 00:53:33,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 00:53:33,715 INFO L124 PetriNetUnfolderBase]: 25/114 cut-off events. [2025-03-09 00:53:33,715 INFO L125 PetriNetUnfolderBase]: For 41/41 co-relation queries the response was YES. [2025-03-09 00:53:33,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 231 conditions, 114 events. 25/114 cut-off events. For 41/41 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 208 event pairs, 3 based on Foata normal form. 12/124 useless extension candidates. Maximal degree in co-relation 209. Up to 26 conditions per place. [2025-03-09 00:53:33,716 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 25 selfloop transitions, 13 changer transitions 0/48 dead transitions. [2025-03-09 00:53:33,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 48 transitions, 210 flow [2025-03-09 00:53:33,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-09 00:53:33,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-09 00:53:33,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 206 transitions. [2025-03-09 00:53:33,718 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5322997416020672 [2025-03-09 00:53:33,718 INFO L175 Difference]: Start difference. First operand has 39 places, 32 transitions, 96 flow. Second operand 9 states and 206 transitions. [2025-03-09 00:53:33,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 48 transitions, 210 flow [2025-03-09 00:53:33,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 48 transitions, 202 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-09 00:53:33,719 INFO L231 Difference]: Finished difference. Result has 44 places, 36 transitions, 139 flow [2025-03-09 00:53:33,720 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=139, PETRI_PLACES=44, PETRI_TRANSITIONS=36} [2025-03-09 00:53:33,720 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 2 predicate places. [2025-03-09 00:53:33,720 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 36 transitions, 139 flow [2025-03-09 00:53:33,720 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 20.4) internal successors, (204), 10 states have internal predecessors, (204), 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 00:53:33,720 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 00:53:33,720 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 00:53:33,728 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-03-09 00:53:33,921 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 00:53:33,921 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-03-09 00:53:33,921 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 00:53:33,922 INFO L85 PathProgramCache]: Analyzing trace with hash -272447937, now seen corresponding path program 1 times [2025-03-09 00:53:33,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-09 00:53:33,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1570334265] [2025-03-09 00:53:33,922 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 00:53:33,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 00:53:33,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 00:53:33,924 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 00:53:33,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-09 00:53:33,963 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-03-09 00:53:33,974 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-03-09 00:53:33,974 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 00:53:33,974 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 00:53:33,975 INFO L256 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-09 00:53:33,979 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 00:53:33,985 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 00:53:34,074 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 00:53:34,074 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 00:53:34,146 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 00:53:34,146 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-09 00:53:34,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570334265] [2025-03-09 00:53:34,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570334265] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 00:53:34,146 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-09 00:53:34,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2025-03-09 00:53:34,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783422706] [2025-03-09 00:53:34,147 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-09 00:53:34,147 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-09 00:53:34,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-09 00:53:34,147 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-09 00:53:34,147 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2025-03-09 00:53:34,246 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 43 [2025-03-09 00:53:34,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 36 transitions, 139 flow. Second operand has 8 states, 8 states have (on average 20.625) internal successors, (165), 8 states have internal predecessors, (165), 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 00:53:34,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 00:53:34,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 43 [2025-03-09 00:53:34,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 00:53:34,402 INFO L124 PetriNetUnfolderBase]: 25/111 cut-off events. [2025-03-09 00:53:34,402 INFO L125 PetriNetUnfolderBase]: For 85/85 co-relation queries the response was YES. [2025-03-09 00:53:34,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 251 conditions, 111 events. 25/111 cut-off events. For 85/85 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 179 event pairs, 4 based on Foata normal form. 6/115 useless extension candidates. Maximal degree in co-relation 227. Up to 29 conditions per place. [2025-03-09 00:53:34,403 INFO L140 encePairwiseOnDemand]: 37/43 looper letters, 26 selfloop transitions, 11 changer transitions 0/48 dead transitions. [2025-03-09 00:53:34,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 48 transitions, 237 flow [2025-03-09 00:53:34,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-09 00:53:34,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-09 00:53:34,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2025-03-09 00:53:34,405 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5514950166112956 [2025-03-09 00:53:34,405 INFO L175 Difference]: Start difference. First operand has 44 places, 36 transitions, 139 flow. Second operand 7 states and 166 transitions. [2025-03-09 00:53:34,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 48 transitions, 237 flow [2025-03-09 00:53:34,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 48 transitions, 214 flow, removed 7 selfloop flow, removed 4 redundant places. [2025-03-09 00:53:34,406 INFO L231 Difference]: Finished difference. Result has 50 places, 37 transitions, 166 flow [2025-03-09 00:53:34,406 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=166, PETRI_PLACES=50, PETRI_TRANSITIONS=37} [2025-03-09 00:53:34,408 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 8 predicate places. [2025-03-09 00:53:34,409 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 37 transitions, 166 flow [2025-03-09 00:53:34,409 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.625) internal successors, (165), 8 states have internal predecessors, (165), 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 00:53:34,409 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 00:53:34,409 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 00:53:34,416 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-03-09 00:53:34,609 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 00:53:34,610 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-03-09 00:53:34,610 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 00:53:34,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1268546384, now seen corresponding path program 1 times [2025-03-09 00:53:34,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-09 00:53:34,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1853935525] [2025-03-09 00:53:34,610 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 00:53:34,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 00:53:34,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 00:53:34,612 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 00:53:34,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-09 00:53:34,651 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-09 00:53:34,663 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-09 00:53:34,663 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 00:53:34,663 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 00:53:34,665 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-09 00:53:34,666 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 00:53:34,726 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2025-03-09 00:53:34,732 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 00:53:34,732 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-09 00:53:34,732 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-09 00:53:34,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853935525] [2025-03-09 00:53:34,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853935525] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 00:53:34,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 00:53:34,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-09 00:53:34,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643587910] [2025-03-09 00:53:34,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 00:53:34,733 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-09 00:53:34,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-09 00:53:34,733 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-09 00:53:34,733 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-09 00:53:34,753 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 43 [2025-03-09 00:53:34,754 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 37 transitions, 166 flow. Second operand has 5 states, 5 states have (on average 23.2) internal successors, (116), 5 states have internal predecessors, (116), 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 00:53:34,754 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 00:53:34,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 43 [2025-03-09 00:53:34,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 00:53:34,840 INFO L124 PetriNetUnfolderBase]: 21/109 cut-off events. [2025-03-09 00:53:34,841 INFO L125 PetriNetUnfolderBase]: For 104/104 co-relation queries the response was YES. [2025-03-09 00:53:34,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 272 conditions, 109 events. 21/109 cut-off events. For 104/104 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 176 event pairs, 12 based on Foata normal form. 2/109 useless extension candidates. Maximal degree in co-relation 244. Up to 51 conditions per place. [2025-03-09 00:53:34,841 INFO L140 encePairwiseOnDemand]: 38/43 looper letters, 23 selfloop transitions, 5 changer transitions 0/41 dead transitions. [2025-03-09 00:53:34,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 41 transitions, 223 flow [2025-03-09 00:53:34,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-09 00:53:34,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-09 00:53:34,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2025-03-09 00:53:34,844 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.562015503875969 [2025-03-09 00:53:34,845 INFO L175 Difference]: Start difference. First operand has 50 places, 37 transitions, 166 flow. Second operand 6 states and 145 transitions. [2025-03-09 00:53:34,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 41 transitions, 223 flow [2025-03-09 00:53:34,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 41 transitions, 210 flow, removed 0 selfloop flow, removed 5 redundant places. [2025-03-09 00:53:34,848 INFO L231 Difference]: Finished difference. Result has 51 places, 38 transitions, 164 flow [2025-03-09 00:53:34,848 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=164, PETRI_PLACES=51, PETRI_TRANSITIONS=38} [2025-03-09 00:53:34,849 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 9 predicate places. [2025-03-09 00:53:34,849 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 38 transitions, 164 flow [2025-03-09 00:53:34,849 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.2) internal successors, (116), 5 states have internal predecessors, (116), 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 00:53:34,851 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 00:53:34,851 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 00:53:34,857 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-03-09 00:53:35,055 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 00:53:35,055 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-03-09 00:53:35,056 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 00:53:35,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1127090055, now seen corresponding path program 1 times [2025-03-09 00:53:35,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-09 00:53:35,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [921481078] [2025-03-09 00:53:35,056 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 00:53:35,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 00:53:35,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 00:53:35,058 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 00:53:35,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-09 00:53:35,096 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-03-09 00:53:35,111 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-03-09 00:53:35,111 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 00:53:35,111 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 00:53:35,113 INFO L256 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-03-09 00:53:35,114 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 00:53:35,126 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 00:53:35,343 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2025-03-09 00:53:35,350 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 00:53:35,350 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 00:53:35,528 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 00:53:35,529 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-09 00:53:35,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921481078] [2025-03-09 00:53:35,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921481078] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 00:53:35,529 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-09 00:53:35,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2025-03-09 00:53:35,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413529710] [2025-03-09 00:53:35,529 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-09 00:53:35,529 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-09 00:53:35,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-09 00:53:35,529 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-09 00:53:35,529 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2025-03-09 00:53:35,878 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2025-03-09 00:53:35,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 38 transitions, 164 flow. Second operand has 14 states, 14 states have (on average 19.5) internal successors, (273), 14 states have internal predecessors, (273), 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 00:53:35,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 00:53:35,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2025-03-09 00:53:35,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 00:53:36,173 INFO L124 PetriNetUnfolderBase]: 23/109 cut-off events. [2025-03-09 00:53:36,173 INFO L125 PetriNetUnfolderBase]: For 87/87 co-relation queries the response was YES. [2025-03-09 00:53:36,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 288 conditions, 109 events. 23/109 cut-off events. For 87/87 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 174 event pairs, 6 based on Foata normal form. 2/109 useless extension candidates. Maximal degree in co-relation 258. Up to 31 conditions per place. [2025-03-09 00:53:36,174 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 27 selfloop transitions, 11 changer transitions 0/48 dead transitions. [2025-03-09 00:53:36,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 48 transitions, 262 flow [2025-03-09 00:53:36,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-09 00:53:36,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-09 00:53:36,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 206 transitions. [2025-03-09 00:53:36,177 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4790697674418605 [2025-03-09 00:53:36,177 INFO L175 Difference]: Start difference. First operand has 51 places, 38 transitions, 164 flow. Second operand 10 states and 206 transitions. [2025-03-09 00:53:36,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 48 transitions, 262 flow [2025-03-09 00:53:36,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 48 transitions, 259 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-09 00:53:36,178 INFO L231 Difference]: Finished difference. Result has 59 places, 38 transitions, 183 flow [2025-03-09 00:53:36,178 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=153, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=183, PETRI_PLACES=59, PETRI_TRANSITIONS=38} [2025-03-09 00:53:36,179 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 17 predicate places. [2025-03-09 00:53:36,179 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 38 transitions, 183 flow [2025-03-09 00:53:36,179 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 19.5) internal successors, (273), 14 states have internal predecessors, (273), 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 00:53:36,179 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 00:53:36,179 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 00:53:36,187 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-03-09 00:53:36,380 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 00:53:36,381 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-03-09 00:53:36,381 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 00:53:36,381 INFO L85 PathProgramCache]: Analyzing trace with hash -962323602, now seen corresponding path program 2 times [2025-03-09 00:53:36,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-09 00:53:36,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [279057359] [2025-03-09 00:53:36,381 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-09 00:53:36,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 00:53:36,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 00:53:36,383 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 00:53:36,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-09 00:53:36,423 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 35 statements into 2 equivalence classes. [2025-03-09 00:53:36,443 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 35 of 35 statements. [2025-03-09 00:53:36,443 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-09 00:53:36,443 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 00:53:36,445 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-09 00:53:36,446 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 00:53:36,463 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 00:53:36,767 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2025-03-09 00:53:36,776 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 00:53:36,776 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 00:53:37,020 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 00:53:37,021 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-09 00:53:37,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279057359] [2025-03-09 00:53:37,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279057359] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 00:53:37,021 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-09 00:53:37,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2025-03-09 00:53:37,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985258015] [2025-03-09 00:53:37,021 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-09 00:53:37,021 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-09 00:53:37,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-09 00:53:37,022 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-09 00:53:37,022 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2025-03-09 00:53:37,502 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2025-03-09 00:53:37,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 38 transitions, 183 flow. Second operand has 16 states, 16 states have (on average 19.5625) internal successors, (313), 16 states have internal predecessors, (313), 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 00:53:37,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 00:53:37,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2025-03-09 00:53:37,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 00:53:37,895 INFO L124 PetriNetUnfolderBase]: 21/107 cut-off events. [2025-03-09 00:53:37,895 INFO L125 PetriNetUnfolderBase]: For 128/128 co-relation queries the response was YES. [2025-03-09 00:53:37,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 304 conditions, 107 events. 21/107 cut-off events. For 128/128 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 145 event pairs, 4 based on Foata normal form. 2/107 useless extension candidates. Maximal degree in co-relation 270. Up to 25 conditions per place. [2025-03-09 00:53:37,896 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 28 selfloop transitions, 12 changer transitions 0/50 dead transitions. [2025-03-09 00:53:37,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 50 transitions, 291 flow [2025-03-09 00:53:37,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-09 00:53:37,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-03-09 00:53:37,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 245 transitions. [2025-03-09 00:53:37,899 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4748062015503876 [2025-03-09 00:53:37,899 INFO L175 Difference]: Start difference. First operand has 59 places, 38 transitions, 183 flow. Second operand 12 states and 245 transitions. [2025-03-09 00:53:37,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 50 transitions, 291 flow [2025-03-09 00:53:37,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 50 transitions, 261 flow, removed 6 selfloop flow, removed 9 redundant places. [2025-03-09 00:53:37,900 INFO L231 Difference]: Finished difference. Result has 62 places, 38 transitions, 179 flow [2025-03-09 00:53:37,900 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=147, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=179, PETRI_PLACES=62, PETRI_TRANSITIONS=38} [2025-03-09 00:53:37,901 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 20 predicate places. [2025-03-09 00:53:37,901 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 38 transitions, 179 flow [2025-03-09 00:53:37,901 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 19.5625) internal successors, (313), 16 states have internal predecessors, (313), 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 00:53:37,901 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 00:53:37,901 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 00:53:37,908 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-03-09 00:53:38,101 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 00:53:38,102 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-03-09 00:53:38,102 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 00:53:38,102 INFO L85 PathProgramCache]: Analyzing trace with hash -1222411502, now seen corresponding path program 2 times [2025-03-09 00:53:38,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-09 00:53:38,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2065637227] [2025-03-09 00:53:38,103 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-09 00:53:38,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 00:53:38,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 00:53:38,105 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 00:53:38,106 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-09 00:53:38,145 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 35 statements into 2 equivalence classes. [2025-03-09 00:53:38,167 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 35 of 35 statements. [2025-03-09 00:53:38,167 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-09 00:53:38,167 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 00:53:38,169 INFO L256 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-03-09 00:53:38,171 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 00:53:38,190 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2025-03-09 00:53:38,191 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2025-03-09 00:53:38,568 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 00:53:38,568 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 00:53:39,197 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 00:53:39,197 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-09 00:53:39,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065637227] [2025-03-09 00:53:39,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065637227] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 00:53:39,198 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-09 00:53:39,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 17 [2025-03-09 00:53:39,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033211817] [2025-03-09 00:53:39,198 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-09 00:53:39,198 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-09 00:53:39,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-09 00:53:39,198 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-09 00:53:39,199 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2025-03-09 00:53:39,854 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2025-03-09 00:53:39,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 38 transitions, 179 flow. Second operand has 19 states, 19 states have (on average 17.63157894736842) internal successors, (335), 19 states have internal predecessors, (335), 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 00:53:39,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 00:53:39,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2025-03-09 00:53:39,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 00:53:41,603 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2025-03-09 00:53:42,179 INFO L124 PetriNetUnfolderBase]: 68/239 cut-off events. [2025-03-09 00:53:42,179 INFO L125 PetriNetUnfolderBase]: For 365/365 co-relation queries the response was YES. [2025-03-09 00:53:42,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 760 conditions, 239 events. 68/239 cut-off events. For 365/365 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 358 event pairs, 3 based on Foata normal form. 0/234 useless extension candidates. Maximal degree in co-relation 727. Up to 50 conditions per place. [2025-03-09 00:53:42,180 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 58 selfloop transitions, 27 changer transitions 0/93 dead transitions. [2025-03-09 00:53:42,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 93 transitions, 652 flow [2025-03-09 00:53:42,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-03-09 00:53:42,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2025-03-09 00:53:42,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 360 transitions. [2025-03-09 00:53:42,184 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2025-03-09 00:53:42,184 INFO L175 Difference]: Start difference. First operand has 62 places, 38 transitions, 179 flow. Second operand 18 states and 360 transitions. [2025-03-09 00:53:42,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 93 transitions, 652 flow [2025-03-09 00:53:42,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 93 transitions, 600 flow, removed 0 selfloop flow, removed 9 redundant places. [2025-03-09 00:53:42,186 INFO L231 Difference]: Finished difference. Result has 78 places, 57 transitions, 414 flow [2025-03-09 00:53:42,186 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=414, PETRI_PLACES=78, PETRI_TRANSITIONS=57} [2025-03-09 00:53:42,188 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 36 predicate places. [2025-03-09 00:53:42,188 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 57 transitions, 414 flow [2025-03-09 00:53:42,188 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 17.63157894736842) internal successors, (335), 19 states have internal predecessors, (335), 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 00:53:42,188 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 00:53:42,189 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 00:53:42,196 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2025-03-09 00:53:42,389 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 00:53:42,389 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-03-09 00:53:42,390 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 00:53:42,390 INFO L85 PathProgramCache]: Analyzing trace with hash 2083591284, now seen corresponding path program 2 times [2025-03-09 00:53:42,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-09 00:53:42,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [222109616] [2025-03-09 00:53:42,390 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-09 00:53:42,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 00:53:42,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 00:53:42,392 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 00:53:42,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-09 00:53:42,433 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 37 statements into 2 equivalence classes. [2025-03-09 00:53:42,441 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 13 of 37 statements. [2025-03-09 00:53:42,441 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-09 00:53:42,441 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 00:53:42,442 INFO L256 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-09 00:53:42,443 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 00:53:42,458 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2025-03-09 00:53:42,458 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2025-03-09 00:53:42,702 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2025-03-09 00:53:42,703 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 00:53:42,985 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2025-03-09 00:53:42,985 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-09 00:53:42,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222109616] [2025-03-09 00:53:42,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222109616] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 00:53:42,985 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-09 00:53:42,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2025-03-09 00:53:42,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695660745] [2025-03-09 00:53:42,985 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-09 00:53:42,985 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-09 00:53:42,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-09 00:53:42,985 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-09 00:53:42,986 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2025-03-09 00:53:43,301 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2025-03-09 00:53:43,302 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 57 transitions, 414 flow. Second operand has 10 states, 10 states have (on average 19.8) internal successors, (198), 10 states have internal predecessors, (198), 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 00:53:43,302 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 00:53:43,302 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2025-03-09 00:53:43,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 00:53:43,430 INFO L124 PetriNetUnfolderBase]: 60/222 cut-off events. [2025-03-09 00:53:43,430 INFO L125 PetriNetUnfolderBase]: For 800/800 co-relation queries the response was YES. [2025-03-09 00:53:43,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 773 conditions, 222 events. 60/222 cut-off events. For 800/800 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 312 event pairs, 2 based on Foata normal form. 12/234 useless extension candidates. Maximal degree in co-relation 732. Up to 95 conditions per place. [2025-03-09 00:53:43,432 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 24 selfloop transitions, 24 changer transitions 0/58 dead transitions. [2025-03-09 00:53:43,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 58 transitions, 488 flow [2025-03-09 00:53:43,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-09 00:53:43,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-09 00:53:43,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 126 transitions. [2025-03-09 00:53:43,433 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4883720930232558 [2025-03-09 00:53:43,433 INFO L175 Difference]: Start difference. First operand has 78 places, 57 transitions, 414 flow. Second operand 6 states and 126 transitions. [2025-03-09 00:53:43,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 58 transitions, 488 flow [2025-03-09 00:53:43,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 58 transitions, 461 flow, removed 0 selfloop flow, removed 6 redundant places. [2025-03-09 00:53:43,436 INFO L231 Difference]: Finished difference. Result has 74 places, 55 transitions, 423 flow [2025-03-09 00:53:43,436 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=355, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=423, PETRI_PLACES=74, PETRI_TRANSITIONS=55} [2025-03-09 00:53:43,438 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 32 predicate places. [2025-03-09 00:53:43,438 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 55 transitions, 423 flow [2025-03-09 00:53:43,439 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 19.8) internal successors, (198), 10 states have internal predecessors, (198), 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 00:53:43,439 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 00:53:43,439 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 00:53:43,445 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-03-09 00:53:43,639 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 00:53:43,639 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-03-09 00:53:43,640 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 00:53:43,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1478119323, now seen corresponding path program 3 times [2025-03-09 00:53:43,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-09 00:53:43,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [225623452] [2025-03-09 00:53:43,640 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-09 00:53:43,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 00:53:43,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 00:53:43,642 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 00:53:43,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-09 00:53:43,682 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 41 statements into 4 equivalence classes. [2025-03-09 00:53:43,711 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 41 of 41 statements. [2025-03-09 00:53:43,711 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-03-09 00:53:43,711 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 00:53:43,713 INFO L256 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-03-09 00:53:43,715 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 00:53:43,725 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 00:53:44,027 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2025-03-09 00:53:44,035 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 00:53:44,036 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 00:53:44,311 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 00:53:44,311 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-09 00:53:44,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225623452] [2025-03-09 00:53:44,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225623452] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 00:53:44,311 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-09 00:53:44,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2025-03-09 00:53:44,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020111908] [2025-03-09 00:53:44,311 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-09 00:53:44,312 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-09 00:53:44,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-09 00:53:44,312 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-09 00:53:44,312 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2025-03-09 00:53:44,782 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2025-03-09 00:53:44,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 55 transitions, 423 flow. Second operand has 18 states, 18 states have (on average 19.555555555555557) internal successors, (352), 18 states have internal predecessors, (352), 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 00:53:44,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 00:53:44,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2025-03-09 00:53:44,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 00:53:45,263 INFO L124 PetriNetUnfolderBase]: 54/214 cut-off events. [2025-03-09 00:53:45,263 INFO L125 PetriNetUnfolderBase]: For 800/800 co-relation queries the response was YES. [2025-03-09 00:53:45,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 781 conditions, 214 events. 54/214 cut-off events. For 800/800 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 296 event pairs, 14 based on Foata normal form. 2/216 useless extension candidates. Maximal degree in co-relation 738. Up to 63 conditions per place. [2025-03-09 00:53:45,264 INFO L140 encePairwiseOnDemand]: 37/43 looper letters, 37 selfloop transitions, 18 changer transitions 0/69 dead transitions. [2025-03-09 00:53:45,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 69 transitions, 566 flow [2025-03-09 00:53:45,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-09 00:53:45,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2025-03-09 00:53:45,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 265 transitions. [2025-03-09 00:53:45,266 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4740608228980322 [2025-03-09 00:53:45,266 INFO L175 Difference]: Start difference. First operand has 74 places, 55 transitions, 423 flow. Second operand 13 states and 265 transitions. [2025-03-09 00:53:45,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 69 transitions, 566 flow [2025-03-09 00:53:45,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 69 transitions, 534 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-03-09 00:53:45,269 INFO L231 Difference]: Finished difference. Result has 83 places, 55 transitions, 423 flow [2025-03-09 00:53:45,269 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=379, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=423, PETRI_PLACES=83, PETRI_TRANSITIONS=55} [2025-03-09 00:53:45,270 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 41 predicate places. [2025-03-09 00:53:45,270 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 55 transitions, 423 flow [2025-03-09 00:53:45,270 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 19.555555555555557) internal successors, (352), 18 states have internal predecessors, (352), 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 00:53:45,270 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 00:53:45,270 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 00:53:45,278 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-03-09 00:53:45,470 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 00:53:45,471 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-03-09 00:53:45,471 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 00:53:45,471 INFO L85 PathProgramCache]: Analyzing trace with hash 535549820, now seen corresponding path program 4 times [2025-03-09 00:53:45,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-09 00:53:45,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1806627449] [2025-03-09 00:53:45,472 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-09 00:53:45,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 00:53:45,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 00:53:45,474 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 00:53:45,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-03-09 00:53:45,514 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 47 statements into 2 equivalence classes. [2025-03-09 00:53:45,563 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 47 of 47 statements. [2025-03-09 00:53:45,563 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-09 00:53:45,563 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 00:53:45,567 INFO L256 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-03-09 00:53:45,568 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 00:53:45,577 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 00:53:45,960 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2025-03-09 00:53:45,968 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 00:53:45,968 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 00:53:46,319 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 00:53:46,319 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-09 00:53:46,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806627449] [2025-03-09 00:53:46,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806627449] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 00:53:46,319 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-09 00:53:46,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2025-03-09 00:53:46,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586864628] [2025-03-09 00:53:46,319 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-09 00:53:46,319 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-03-09 00:53:46,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-09 00:53:46,320 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-03-09 00:53:46,320 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2025-03-09 00:53:47,039 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2025-03-09 00:53:47,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 55 transitions, 423 flow. Second operand has 20 states, 20 states have (on average 19.65) internal successors, (393), 20 states have internal predecessors, (393), 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 00:53:47,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 00:53:47,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2025-03-09 00:53:47,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 00:53:48,302 INFO L124 PetriNetUnfolderBase]: 48/214 cut-off events. [2025-03-09 00:53:48,302 INFO L125 PetriNetUnfolderBase]: For 731/731 co-relation queries the response was YES. [2025-03-09 00:53:48,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 796 conditions, 214 events. 48/214 cut-off events. For 731/731 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 293 event pairs, 4 based on Foata normal form. 6/220 useless extension candidates. Maximal degree in co-relation 752. Up to 40 conditions per place. [2025-03-09 00:53:48,303 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 49 selfloop transitions, 27 changer transitions 0/90 dead transitions. [2025-03-09 00:53:48,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 90 transitions, 721 flow [2025-03-09 00:53:48,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-03-09 00:53:48,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2025-03-09 00:53:48,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 487 transitions. [2025-03-09 00:53:48,305 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.47189922480620156 [2025-03-09 00:53:48,306 INFO L175 Difference]: Start difference. First operand has 83 places, 55 transitions, 423 flow. Second operand 24 states and 487 transitions. [2025-03-09 00:53:48,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 90 transitions, 721 flow [2025-03-09 00:53:48,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 90 transitions, 671 flow, removed 0 selfloop flow, removed 11 redundant places. [2025-03-09 00:53:48,311 INFO L231 Difference]: Finished difference. Result has 99 places, 60 transitions, 482 flow [2025-03-09 00:53:48,311 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=364, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=482, PETRI_PLACES=99, PETRI_TRANSITIONS=60} [2025-03-09 00:53:48,312 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 57 predicate places. [2025-03-09 00:53:48,312 INFO L471 AbstractCegarLoop]: Abstraction has has 99 places, 60 transitions, 482 flow [2025-03-09 00:53:48,312 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 19.65) internal successors, (393), 20 states have internal predecessors, (393), 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 00:53:48,312 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 00:53:48,312 INFO L206 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 00:53:48,321 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2025-03-09 00:53:48,513 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 00:53:48,513 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-03-09 00:53:48,513 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 00:53:48,514 INFO L85 PathProgramCache]: Analyzing trace with hash -1475892749, now seen corresponding path program 5 times [2025-03-09 00:53:48,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-09 00:53:48,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2034460430] [2025-03-09 00:53:48,514 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-09 00:53:48,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 00:53:48,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 00:53:48,516 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 00:53:48,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-03-09 00:53:48,558 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 53 statements into 6 equivalence classes. [2025-03-09 00:53:48,620 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) and asserted 53 of 53 statements. [2025-03-09 00:53:48,620 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2025-03-09 00:53:48,620 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 00:53:48,624 INFO L256 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-03-09 00:53:48,625 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 00:53:48,635 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 00:53:49,099 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2025-03-09 00:53:49,107 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 00:53:49,107 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 00:53:49,524 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 00:53:49,524 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-09 00:53:49,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034460430] [2025-03-09 00:53:49,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034460430] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 00:53:49,524 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-09 00:53:49,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2025-03-09 00:53:49,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083003694] [2025-03-09 00:53:49,525 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-09 00:53:49,525 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-03-09 00:53:49,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-09 00:53:49,525 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-03-09 00:53:49,525 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2025-03-09 00:53:50,394 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2025-03-09 00:53:50,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 60 transitions, 482 flow. Second operand has 22 states, 22 states have (on average 19.636363636363637) internal successors, (432), 22 states have internal predecessors, (432), 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 00:53:50,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 00:53:50,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2025-03-09 00:53:50,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 00:53:51,948 INFO L124 PetriNetUnfolderBase]: 51/243 cut-off events. [2025-03-09 00:53:51,948 INFO L125 PetriNetUnfolderBase]: For 1108/1108 co-relation queries the response was YES. [2025-03-09 00:53:51,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 954 conditions, 243 events. 51/243 cut-off events. For 1108/1108 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 333 event pairs, 4 based on Foata normal form. 6/249 useless extension candidates. Maximal degree in co-relation 906. Up to 45 conditions per place. [2025-03-09 00:53:51,949 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 54 selfloop transitions, 30 changer transitions 0/98 dead transitions. [2025-03-09 00:53:51,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 98 transitions, 832 flow [2025-03-09 00:53:51,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2025-03-09 00:53:51,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2025-03-09 00:53:51,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 563 transitions. [2025-03-09 00:53:51,953 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4676079734219269 [2025-03-09 00:53:51,953 INFO L175 Difference]: Start difference. First operand has 99 places, 60 transitions, 482 flow. Second operand 28 states and 563 transitions. [2025-03-09 00:53:51,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 98 transitions, 832 flow [2025-03-09 00:53:51,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 98 transitions, 795 flow, removed 2 selfloop flow, removed 16 redundant places. [2025-03-09 00:53:51,959 INFO L231 Difference]: Finished difference. Result has 116 places, 64 transitions, 579 flow [2025-03-09 00:53:51,959 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=432, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=579, PETRI_PLACES=116, PETRI_TRANSITIONS=64} [2025-03-09 00:53:51,960 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 74 predicate places. [2025-03-09 00:53:51,960 INFO L471 AbstractCegarLoop]: Abstraction has has 116 places, 64 transitions, 579 flow [2025-03-09 00:53:51,960 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 19.636363636363637) internal successors, (432), 22 states have internal predecessors, (432), 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 00:53:51,960 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 00:53:51,960 INFO L206 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 00:53:51,968 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2025-03-09 00:53:52,161 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 00:53:52,161 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-03-09 00:53:52,161 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 00:53:52,162 INFO L85 PathProgramCache]: Analyzing trace with hash -2033567526, now seen corresponding path program 6 times [2025-03-09 00:53:52,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-09 00:53:52,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2000455560] [2025-03-09 00:53:52,162 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-09 00:53:52,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 00:53:52,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 00:53:52,164 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 00:53:52,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-03-09 00:53:52,207 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 59 statements into 7 equivalence classes. [2025-03-09 00:53:52,278 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) and asserted 59 of 59 statements. [2025-03-09 00:53:52,278 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2025-03-09 00:53:52,278 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 00:53:52,282 INFO L256 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-09 00:53:52,284 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 00:53:52,295 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 00:53:52,836 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2025-03-09 00:53:52,849 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 00:53:52,850 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 00:53:53,356 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 00:53:53,357 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-09 00:53:53,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000455560] [2025-03-09 00:53:53,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000455560] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 00:53:53,357 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-09 00:53:53,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2025-03-09 00:53:53,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387393676] [2025-03-09 00:53:53,357 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-09 00:53:53,357 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-03-09 00:53:53,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-09 00:53:53,357 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-03-09 00:53:53,358 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2025-03-09 00:53:54,300 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2025-03-09 00:53:54,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 64 transitions, 579 flow. Second operand has 24 states, 24 states have (on average 19.666666666666668) internal successors, (472), 24 states have internal predecessors, (472), 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 00:53:54,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 00:53:54,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2025-03-09 00:53:54,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 00:53:56,304 INFO L124 PetriNetUnfolderBase]: 54/272 cut-off events. [2025-03-09 00:53:56,304 INFO L125 PetriNetUnfolderBase]: For 1678/1678 co-relation queries the response was YES. [2025-03-09 00:53:56,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1156 conditions, 272 events. 54/272 cut-off events. For 1678/1678 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 369 event pairs, 4 based on Foata normal form. 6/278 useless extension candidates. Maximal degree in co-relation 1100. Up to 50 conditions per place. [2025-03-09 00:53:56,305 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 59 selfloop transitions, 33 changer transitions 0/106 dead transitions. [2025-03-09 00:53:56,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 106 transitions, 983 flow [2025-03-09 00:53:56,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2025-03-09 00:53:56,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2025-03-09 00:53:56,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 639 transitions. [2025-03-09 00:53:56,307 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4643895348837209 [2025-03-09 00:53:56,307 INFO L175 Difference]: Start difference. First operand has 116 places, 64 transitions, 579 flow. Second operand 32 states and 639 transitions. [2025-03-09 00:53:56,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 106 transitions, 983 flow [2025-03-09 00:53:56,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 106 transitions, 929 flow, removed 6 selfloop flow, removed 21 redundant places. [2025-03-09 00:53:56,314 INFO L231 Difference]: Finished difference. Result has 132 places, 68 transitions, 682 flow [2025-03-09 00:53:56,314 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=512, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=682, PETRI_PLACES=132, PETRI_TRANSITIONS=68} [2025-03-09 00:53:56,315 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 90 predicate places. [2025-03-09 00:53:56,315 INFO L471 AbstractCegarLoop]: Abstraction has has 132 places, 68 transitions, 682 flow [2025-03-09 00:53:56,315 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 19.666666666666668) internal successors, (472), 24 states have internal predecessors, (472), 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 00:53:56,315 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 00:53:56,315 INFO L206 CegarLoopForPetriNet]: trace histogram [9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 00:53:56,324 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2025-03-09 00:53:56,516 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 00:53:56,516 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-03-09 00:53:56,516 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 00:53:56,517 INFO L85 PathProgramCache]: Analyzing trace with hash -81572306, now seen corresponding path program 3 times [2025-03-09 00:53:56,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-09 00:53:56,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1992375555] [2025-03-09 00:53:56,517 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-09 00:53:56,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 00:53:56,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 00:53:56,519 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 00:53:56,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-03-09 00:53:56,563 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 59 statements into 9 equivalence classes. [2025-03-09 00:53:56,574 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 17 of 59 statements. [2025-03-09 00:53:56,574 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-09 00:53:56,574 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 00:53:56,575 INFO L256 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-03-09 00:53:56,576 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 00:53:56,606 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2025-03-09 00:53:56,607 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2025-03-09 00:53:56,615 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2025-03-09 00:53:56,615 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2025-03-09 00:53:57,274 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-09 00:53:57,275 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2025-03-09 00:53:57,380 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2025-03-09 00:53:57,380 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 00:53:58,172 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2025-03-09 00:53:58,172 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-09 00:53:58,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992375555] [2025-03-09 00:53:58,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992375555] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 00:53:58,172 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-09 00:53:58,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2025-03-09 00:53:58,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175675517] [2025-03-09 00:53:58,173 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-09 00:53:58,173 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-09 00:53:58,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-09 00:53:58,173 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-09 00:53:58,174 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2025-03-09 00:53:58,613 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 43 [2025-03-09 00:53:58,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 68 transitions, 682 flow. Second operand has 14 states, 14 states have (on average 16.571428571428573) internal successors, (232), 14 states have internal predecessors, (232), 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 00:53:58,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 00:53:58,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 43 [2025-03-09 00:53:58,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 00:53:59,066 INFO L124 PetriNetUnfolderBase]: 84/290 cut-off events. [2025-03-09 00:53:59,066 INFO L125 PetriNetUnfolderBase]: For 1748/1748 co-relation queries the response was YES. [2025-03-09 00:53:59,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1272 conditions, 290 events. 84/290 cut-off events. For 1748/1748 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 339 event pairs, 2 based on Foata normal form. 12/302 useless extension candidates. Maximal degree in co-relation 1208. Up to 170 conditions per place. [2025-03-09 00:53:59,067 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 34 selfloop transitions, 32 changer transitions 0/72 dead transitions. [2025-03-09 00:53:59,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 72 transitions, 802 flow [2025-03-09 00:53:59,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-09 00:53:59,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-09 00:53:59,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2025-03-09 00:53:59,069 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2025-03-09 00:53:59,069 INFO L175 Difference]: Start difference. First operand has 132 places, 68 transitions, 682 flow. Second operand 7 states and 129 transitions. [2025-03-09 00:53:59,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 72 transitions, 802 flow [2025-03-09 00:53:59,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 72 transitions, 716 flow, removed 10 selfloop flow, removed 29 redundant places. [2025-03-09 00:53:59,077 INFO L231 Difference]: Finished difference. Result has 107 places, 66 transitions, 634 flow [2025-03-09 00:53:59,077 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=570, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=634, PETRI_PLACES=107, PETRI_TRANSITIONS=66} [2025-03-09 00:53:59,078 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 65 predicate places. [2025-03-09 00:53:59,078 INFO L471 AbstractCegarLoop]: Abstraction has has 107 places, 66 transitions, 634 flow [2025-03-09 00:53:59,078 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 16.571428571428573) internal successors, (232), 14 states have internal predecessors, (232), 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 00:53:59,078 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 00:53:59,078 INFO L206 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 00:53:59,085 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2025-03-09 00:53:59,279 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 00:53:59,279 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-03-09 00:53:59,280 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 00:53:59,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1017757313, now seen corresponding path program 7 times [2025-03-09 00:53:59,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-09 00:53:59,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [688749321] [2025-03-09 00:53:59,280 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-09 00:53:59,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 00:53:59,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 00:53:59,282 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 00:53:59,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-03-09 00:53:59,324 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 65 statements into 1 equivalence classes. [2025-03-09 00:54:00,220 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 65 of 65 statements. [2025-03-09 00:54:00,221 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 00:54:00,221 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-03-09 00:54:00,221 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-03-09 00:54:00,238 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 65 statements into 1 equivalence classes. [2025-03-09 00:54:00,395 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 65 of 65 statements. [2025-03-09 00:54:00,395 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 00:54:00,395 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-03-09 00:54:00,431 INFO L130 FreeRefinementEngine]: Strategy FOX found a feasible trace [2025-03-09 00:54:00,432 INFO L340 BasicCegarLoop]: Counterexample is feasible [2025-03-09 00:54:00,433 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (17 of 18 remaining) [2025-03-09 00:54:00,434 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE (16 of 18 remaining) [2025-03-09 00:54:00,434 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE (15 of 18 remaining) [2025-03-09 00:54:00,434 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (14 of 18 remaining) [2025-03-09 00:54:00,434 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (13 of 18 remaining) [2025-03-09 00:54:00,434 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 18 remaining) [2025-03-09 00:54:00,434 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 18 remaining) [2025-03-09 00:54:00,435 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 18 remaining) [2025-03-09 00:54:00,435 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 18 remaining) [2025-03-09 00:54:00,435 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK (8 of 18 remaining) [2025-03-09 00:54:00,435 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 18 remaining) [2025-03-09 00:54:00,435 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 18 remaining) [2025-03-09 00:54:00,435 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err5ASSERT_VIOLATIONMEMORY_DEREFERENCE (5 of 18 remaining) [2025-03-09 00:54:00,435 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err4ASSERT_VIOLATIONMEMORY_DEREFERENCE (4 of 18 remaining) [2025-03-09 00:54:00,435 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (3 of 18 remaining) [2025-03-09 00:54:00,435 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (2 of 18 remaining) [2025-03-09 00:54:00,435 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 18 remaining) [2025-03-09 00:54:00,435 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 18 remaining) [2025-03-09 00:54:00,445 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2025-03-09 00:54:00,636 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 00:54:00,636 INFO L422 BasicCegarLoop]: Path program histogram: [7, 3, 2, 1, 1, 1, 1, 1, 1] [2025-03-09 00:54:00,679 INFO L241 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2025-03-09 00:54:00,679 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2025-03-09 00:54:00,685 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.03 12:54:00 BasicIcfg [2025-03-09 00:54:00,685 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2025-03-09 00:54:00,686 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2025-03-09 00:54:00,686 INFO L270 PluginConnector]: Initializing Witness Printer... [2025-03-09 00:54:00,686 INFO L274 PluginConnector]: Witness Printer initialized [2025-03-09 00:54:00,686 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 09.03 12:53:30" (3/4) ... [2025-03-09 00:54:00,687 INFO L149 WitnessPrinter]: No result that supports witness generation found [2025-03-09 00:54:00,688 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2025-03-09 00:54:00,688 INFO L158 Benchmark]: Toolchain (without parser) took 31392.50ms. Allocated memory was 117.4MB in the beginning and 260.0MB in the end (delta: 142.6MB). Free memory was 89.7MB in the beginning and 189.6MB in the end (delta: -99.9MB). Peak memory consumption was 44.7MB. Max. memory is 16.1GB. [2025-03-09 00:54:00,689 INFO L158 Benchmark]: CDTParser took 1.00ms. Allocated memory is still 117.4MB. Free memory is still 81.6MB. There was no memory consumed. Max. memory is 16.1GB. [2025-03-09 00:54:00,689 INFO L158 Benchmark]: CACSL2BoogieTranslator took 406.05ms. Allocated memory is still 117.4MB. Free memory was 89.5MB in the beginning and 57.3MB in the end (delta: 32.2MB). Peak memory consumption was 33.6MB. Max. memory is 16.1GB. [2025-03-09 00:54:00,689 INFO L158 Benchmark]: Boogie Procedure Inliner took 41.34ms. Allocated memory is still 117.4MB. Free memory was 57.3MB in the beginning and 55.1MB in the end (delta: 2.2MB). There was no memory consumed. Max. memory is 16.1GB. [2025-03-09 00:54:00,689 INFO L158 Benchmark]: Boogie Preprocessor took 34.13ms. Allocated memory is still 117.4MB. Free memory was 55.1MB in the beginning and 53.2MB in the end (delta: 1.9MB). There was no memory consumed. Max. memory is 16.1GB. [2025-03-09 00:54:00,690 INFO L158 Benchmark]: IcfgBuilder took 513.34ms. Allocated memory is still 117.4MB. Free memory was 53.2MB in the beginning and 66.7MB in the end (delta: -13.5MB). Peak memory consumption was 21.9MB. Max. memory is 16.1GB. [2025-03-09 00:54:00,690 INFO L158 Benchmark]: TraceAbstraction took 30390.01ms. Allocated memory was 117.4MB in the beginning and 260.0MB in the end (delta: 142.6MB). Free memory was 66.3MB in the beginning and 189.6MB in the end (delta: -123.4MB). Peak memory consumption was 22.9MB. Max. memory is 16.1GB. [2025-03-09 00:54:00,690 INFO L158 Benchmark]: Witness Printer took 2.28ms. Allocated memory is still 260.0MB. Free memory is still 189.6MB. There was no memory consumed. Max. memory is 16.1GB. [2025-03-09 00:54:00,691 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.00ms. Allocated memory is still 117.4MB. Free memory is still 81.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 406.05ms. Allocated memory is still 117.4MB. Free memory was 89.5MB in the beginning and 57.3MB in the end (delta: 32.2MB). Peak memory consumption was 33.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 41.34ms. Allocated memory is still 117.4MB. Free memory was 57.3MB in the beginning and 55.1MB in the end (delta: 2.2MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 34.13ms. Allocated memory is still 117.4MB. Free memory was 55.1MB in the beginning and 53.2MB in the end (delta: 1.9MB). There was no memory consumed. Max. memory is 16.1GB. * IcfgBuilder took 513.34ms. Allocated memory is still 117.4MB. Free memory was 53.2MB in the beginning and 66.7MB in the end (delta: -13.5MB). Peak memory consumption was 21.9MB. Max. memory is 16.1GB. * TraceAbstraction took 30390.01ms. Allocated memory was 117.4MB in the beginning and 260.0MB in the end (delta: 142.6MB). Free memory was 66.3MB in the beginning and 189.6MB in the end (delta: -123.4MB). Peak memory consumption was 22.9MB. Max. memory is 16.1GB. * Witness Printer took 2.28ms. Allocated memory is still 260.0MB. Free memory is still 189.6MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 1119]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 1119. Possible FailurePath: [L1108] 0 char *v; [L1121] 0 pthread_t t1, t2; [L1122] FCALL, FORK 0 pthread_create(&t1, 0, thread1, 0) VAL [\old(arg)={0:0}, t1=536870910, v={0:0}] [L1111] 1 v = malloc(sizeof(char) * 8) [L1112] 1 return 0; [L1123] FCALL, JOIN 1 pthread_join(t1, 0) VAL [\old(arg)={0:0}, \result={0:0}, arg={0:0}, t1=536870910, v={67108864:0}] [L1124] FCALL, FORK 0 pthread_create(&t2, 0, thread2, 0) VAL [\old(arg)={0:0}, \result={0:0}, arg={0:0}, t1=536870910, t2=536870911, v={67108864:0}] [L1116] COND TRUE 2 \read(*v) [L1116] FCALL 2 strcpy(v, "Bigshot") [L1117] 2 return 0; [L1125] FCALL, JOIN 2 pthread_join(t2, 0) VAL [\old(arg)={0:0}, \result={0:0}, arg={0:0}, t1=536870910, t2=536870911, v={67108864:0}] [L1126] EXPR 0 v[0] [L1126] CALL 0 __VERIFIER_assert(v[0] == 'B') [L1107] COND FALSE 0 !(!expression) VAL [\old(arg)={0:0}, \old(expression)=1, \result={0:0}, arg={0:0}, expression=1, v={67108864:0}] [L1126] RET 0 __VERIFIER_assert(v[0] == 'B') [L1127] 0 return 0; VAL [\old(arg)={0:0}, \result=0, \result={0:0}, arg={0:0}, t1=536870910, t2=536870911, v={67108864:0}] - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 20]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 1122]: Unable to prove that petrification did provide enough thread instances (tool internal message) Unable to prove that petrification did provide enough thread instances (tool internal message) Reason: Not analyzed. - UnprovableResult [Line: 1124]: Unable to prove that petrification did provide enough thread instances (tool internal message) Unable to prove that petrification did provide enough thread instances (tool internal message) Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 60 locations, 67 edges, 18 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 30.3s, OverallIterations: 18, TraceHistogramMax: 9, PathProgramHistogramMax: 7, EmptinessCheckTime: 0.0s, AutomataDifference: 15.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2720 SdHoareTripleChecker+Valid, 10.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2407 mSDsluCounter, 2175 SdHoareTripleChecker+Invalid, 9.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2071 mSDsCounter, 98 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 9903 IncrementalHoareTripleChecker+Invalid, 10001 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 98 mSolverCounterUnsat, 104 mSDtfsCounter, 9903 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1045 GetRequests, 747 SyntacticMatches, 3 SemanticMatches, 295 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1853 ImplicationChecksByTransitivity, 7.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=682occurred in iteration=16, InterpolantAutomatonStates: 191, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 1.3s SatisfiabilityAnalysisTime, 8.5s InterpolantComputationTime, 578 NumberOfCodeBlocks, 512 NumberOfCodeBlocksAsserted, 36 NumberOfCheckSat, 916 ConstructedInterpolants, 107 QuantifiedInterpolants, 16030 SizeOfPredicates, 90 NumberOfNonLiveVariables, 1778 ConjunctsInSsa, 185 ConjunctsInUnsatCore, 28 InterpolantComputations, 6 PerfectInterpolantSequences, 396/1244 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available, ConComCheckerStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2025-03-09 00:54:00,709 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN: Overapproximated counterexample