./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/chl-chromosome-subst.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 8fc3dc66 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/chl-chromosome-subst.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 60539e5483ee028af31550fcc6bdc40a30b35263f2407e34b5392a698998aa9c --- Real Ultimate output --- This is Ultimate 0.3.0-?-8fc3dc6-m [2025-03-17 14:22:47,155 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-17 14:22:47,205 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-03-17 14:22:47,209 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-17 14:22:47,211 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-17 14:22:47,231 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-17 14:22:47,232 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-17 14:22:47,233 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-17 14:22:47,233 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-17 14:22:47,233 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-17 14:22:47,234 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-17 14:22:47,234 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-17 14:22:47,234 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-17 14:22:47,234 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-17 14:22:47,234 INFO L153 SettingsManager]: * Use SBE=true [2025-03-17 14:22:47,235 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-17 14:22:47,235 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-17 14:22:47,235 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-17 14:22:47,235 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-17 14:22:47,235 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-17 14:22:47,235 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-03-17 14:22:47,235 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-03-17 14:22:47,235 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-03-17 14:22:47,235 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-17 14:22:47,235 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-03-17 14:22:47,236 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-03-17 14:22:47,236 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-17 14:22:47,236 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-17 14:22:47,236 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-17 14:22:47,236 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-17 14:22:47,236 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-17 14:22:47,236 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-17 14:22:47,236 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-17 14:22:47,236 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 14:22:47,237 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-17 14:22:47,237 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-17 14:22:47,237 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-17 14:22:47,237 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-17 14:22:47,237 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-17 14:22:47,237 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-17 14:22:47,237 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-17 14:22:47,237 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-17 14:22:47,237 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 -> 60539e5483ee028af31550fcc6bdc40a30b35263f2407e34b5392a698998aa9c [2025-03-17 14:22:47,441 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-17 14:22:47,446 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-17 14:22:47,448 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-17 14:22:47,449 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-17 14:22:47,449 INFO L274 PluginConnector]: CDTParser initialized [2025-03-17 14:22:47,450 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/chl-chromosome-subst.wvr.c [2025-03-17 14:22:48,606 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9a7d2df8e/744c6d0e755d4d9da13595447238e416/FLAG3d40dc19f [2025-03-17 14:22:48,796 INFO L384 CDTParser]: Found 1 translation units. [2025-03-17 14:22:48,797 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-chromosome-subst.wvr.c [2025-03-17 14:22:48,803 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9a7d2df8e/744c6d0e755d4d9da13595447238e416/FLAG3d40dc19f [2025-03-17 14:22:49,160 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9a7d2df8e/744c6d0e755d4d9da13595447238e416 [2025-03-17 14:22:49,161 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-17 14:22:49,162 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-17 14:22:49,163 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-17 14:22:49,163 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-17 14:22:49,166 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-17 14:22:49,167 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 02:22:49" (1/1) ... [2025-03-17 14:22:49,167 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c369d48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:22:49, skipping insertion in model container [2025-03-17 14:22:49,167 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 02:22:49" (1/1) ... [2025-03-17 14:22:49,178 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-17 14:22:49,295 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-03-17 14:22:49,299 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 14:22:49,306 INFO L200 MainTranslator]: Completed pre-run [2025-03-17 14:22:49,327 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 14:22:49,338 INFO L204 MainTranslator]: Completed translation [2025-03-17 14:22:49,338 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:22:49 WrapperNode [2025-03-17 14:22:49,338 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-17 14:22:49,339 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-17 14:22:49,339 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-17 14:22:49,339 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-17 14:22:49,343 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:22:49" (1/1) ... [2025-03-17 14:22:49,349 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:22:49" (1/1) ... [2025-03-17 14:22:49,370 INFO L138 Inliner]: procedures = 25, calls = 33, calls flagged for inlining = 18, calls inlined = 26, statements flattened = 255 [2025-03-17 14:22:49,370 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-17 14:22:49,370 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-17 14:22:49,371 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-17 14:22:49,371 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-17 14:22:49,376 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:22:49" (1/1) ... [2025-03-17 14:22:49,376 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:22:49" (1/1) ... [2025-03-17 14:22:49,379 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:22:49" (1/1) ... [2025-03-17 14:22:49,393 INFO L175 MemorySlicer]: Split 11 memory accesses to 2 slices as follows [2, 9]. 82 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2025-03-17 14:22:49,394 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:22:49" (1/1) ... [2025-03-17 14:22:49,394 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:22:49" (1/1) ... [2025-03-17 14:22:49,399 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:22:49" (1/1) ... [2025-03-17 14:22:49,400 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:22:49" (1/1) ... [2025-03-17 14:22:49,402 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:22:49" (1/1) ... [2025-03-17 14:22:49,402 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:22:49" (1/1) ... [2025-03-17 14:22:49,404 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-17 14:22:49,405 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-17 14:22:49,405 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-17 14:22:49,405 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-17 14:22:49,406 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:22:49" (1/1) ... [2025-03-17 14:22:49,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 14:22:49,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:22:49,430 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-03-17 14:22:49,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-03-17 14:22:49,446 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-17 14:22:49,447 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-03-17 14:22:49,447 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-03-17 14:22:49,447 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-03-17 14:22:49,447 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-03-17 14:22:49,447 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2025-03-17 14:22:49,447 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2025-03-17 14:22:49,447 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-17 14:22:49,447 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-17 14:22:49,447 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-17 14:22:49,447 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-17 14:22:49,447 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-03-17 14:22:49,447 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-17 14:22:49,447 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-17 14:22:49,447 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-17 14:22:49,447 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-17 14:22:49,448 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-03-17 14:22:49,539 INFO L256 CfgBuilder]: Building ICFG [2025-03-17 14:22:49,541 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-17 14:22:49,944 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-17 14:22:49,944 INFO L307 CfgBuilder]: Performing block encoding [2025-03-17 14:22:50,183 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-17 14:22:50,184 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-17 14:22:50,184 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 02:22:50 BoogieIcfgContainer [2025-03-17 14:22:50,184 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-17 14:22:50,186 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-17 14:22:50,186 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-17 14:22:50,189 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-17 14:22:50,189 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 02:22:49" (1/3) ... [2025-03-17 14:22:50,189 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cc37223 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 02:22:50, skipping insertion in model container [2025-03-17 14:22:50,190 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:22:49" (2/3) ... [2025-03-17 14:22:50,190 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cc37223 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 02:22:50, skipping insertion in model container [2025-03-17 14:22:50,190 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 02:22:50" (3/3) ... [2025-03-17 14:22:50,191 INFO L128 eAbstractionObserver]: Analyzing ICFG chl-chromosome-subst.wvr.c [2025-03-17 14:22:50,201 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-17 14:22:50,202 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG chl-chromosome-subst.wvr.c that has 4 procedures, 55 locations, 1 initial locations, 6 loop locations, and 20 error locations. [2025-03-17 14:22:50,202 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-17 14:22:50,255 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2025-03-17 14:22:50,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 64 places, 60 transitions, 141 flow [2025-03-17 14:22:50,310 INFO L124 PetriNetUnfolderBase]: 6/57 cut-off events. [2025-03-17 14:22:50,312 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-03-17 14:22:50,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70 conditions, 57 events. 6/57 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 140 event pairs, 0 based on Foata normal form. 0/31 useless extension candidates. Maximal degree in co-relation 42. Up to 2 conditions per place. [2025-03-17 14:22:50,316 INFO L82 GeneralOperation]: Start removeDead. Operand has 64 places, 60 transitions, 141 flow [2025-03-17 14:22:50,319 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 60 places, 56 transitions, 130 flow [2025-03-17 14:22:50,326 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-17 14:22:50,334 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;@764d69ae, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-17 14:22:50,334 INFO L334 AbstractCegarLoop]: Starting to check reachability of 35 error locations. [2025-03-17 14:22:50,337 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-17 14:22:50,337 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2025-03-17 14:22:50,337 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-03-17 14:22:50,337 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:22:50,337 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-03-17 14:22:50,338 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2025-03-17 14:22:50,341 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:22:50,341 INFO L85 PathProgramCache]: Analyzing trace with hash 773083, now seen corresponding path program 1 times [2025-03-17 14:22:50,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:22:50,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189377552] [2025-03-17 14:22:50,347 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:22:50,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:22:50,400 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-03-17 14:22:50,418 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-03-17 14:22:50,418 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:22:50,419 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:22:50,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:22:50,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:22:50,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189377552] [2025-03-17 14:22:50,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189377552] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:22:50,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:22:50,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-03-17 14:22:50,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467343146] [2025-03-17 14:22:50,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:22:50,534 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-17 14:22:50,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:22:50,554 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-17 14:22:50,554 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 14:22:50,588 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 60 [2025-03-17 14:22:50,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 56 transitions, 130 flow. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 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) [2025-03-17 14:22:50,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:22:50,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 60 [2025-03-17 14:22:50,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:22:50,750 INFO L124 PetriNetUnfolderBase]: 202/401 cut-off events. [2025-03-17 14:22:50,750 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2025-03-17 14:22:50,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 746 conditions, 401 events. 202/401 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1652 event pairs, 124 based on Foata normal form. 1/328 useless extension candidates. Maximal degree in co-relation 630. Up to 293 conditions per place. [2025-03-17 14:22:50,755 INFO L140 encePairwiseOnDemand]: 54/60 looper letters, 27 selfloop transitions, 2 changer transitions 0/51 dead transitions. [2025-03-17 14:22:50,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 51 transitions, 178 flow [2025-03-17 14:22:50,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 14:22:50,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-17 14:22:50,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 111 transitions. [2025-03-17 14:22:50,765 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6166666666666667 [2025-03-17 14:22:50,766 INFO L175 Difference]: Start difference. First operand has 60 places, 56 transitions, 130 flow. Second operand 3 states and 111 transitions. [2025-03-17 14:22:50,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 51 transitions, 178 flow [2025-03-17 14:22:50,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 51 transitions, 166 flow, removed 0 selfloop flow, removed 6 redundant places. [2025-03-17 14:22:50,772 INFO L231 Difference]: Finished difference. Result has 51 places, 51 transitions, 112 flow [2025-03-17 14:22:50,774 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=51, PETRI_TRANSITIONS=51} [2025-03-17 14:22:50,776 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, -9 predicate places. [2025-03-17 14:22:50,777 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 51 transitions, 112 flow [2025-03-17 14:22:50,778 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 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) [2025-03-17 14:22:50,778 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:22:50,778 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-03-17 14:22:50,778 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-17 14:22:50,778 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2025-03-17 14:22:50,779 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:22:50,779 INFO L85 PathProgramCache]: Analyzing trace with hash 773084, now seen corresponding path program 1 times [2025-03-17 14:22:50,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:22:50,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627196188] [2025-03-17 14:22:50,779 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:22:50,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:22:50,786 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-03-17 14:22:50,800 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-03-17 14:22:50,803 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:22:50,803 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:22:50,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:22:50,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:22:50,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627196188] [2025-03-17 14:22:50,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627196188] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:22:50,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:22:50,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-17 14:22:50,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322993565] [2025-03-17 14:22:50,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:22:50,944 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 14:22:50,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:22:50,945 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 14:22:50,945 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-17 14:22:50,988 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 60 [2025-03-17 14:22:50,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 51 transitions, 112 flow. Second operand has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:22:50,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:22:50,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 60 [2025-03-17 14:22:50,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:22:51,105 INFO L124 PetriNetUnfolderBase]: 202/407 cut-off events. [2025-03-17 14:22:51,105 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-03-17 14:22:51,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 735 conditions, 407 events. 202/407 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1650 event pairs, 124 based on Foata normal form. 1/332 useless extension candidates. Maximal degree in co-relation 692. Up to 305 conditions per place. [2025-03-17 14:22:51,107 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 32 selfloop transitions, 6 changer transitions 0/57 dead transitions. [2025-03-17 14:22:51,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 57 transitions, 200 flow [2025-03-17 14:22:51,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 14:22:51,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-17 14:22:51,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 122 transitions. [2025-03-17 14:22:51,109 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6777777777777778 [2025-03-17 14:22:51,109 INFO L175 Difference]: Start difference. First operand has 51 places, 51 transitions, 112 flow. Second operand 3 states and 122 transitions. [2025-03-17 14:22:51,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 57 transitions, 200 flow [2025-03-17 14:22:51,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 57 transitions, 196 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-17 14:22:51,112 INFO L231 Difference]: Finished difference. Result has 52 places, 54 transitions, 146 flow [2025-03-17 14:22:51,112 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=52, PETRI_TRANSITIONS=54} [2025-03-17 14:22:51,113 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, -8 predicate places. [2025-03-17 14:22:51,113 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 54 transitions, 146 flow [2025-03-17 14:22:51,113 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:22:51,113 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:22:51,113 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2025-03-17 14:22:51,113 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-17 14:22:51,113 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2025-03-17 14:22:51,113 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:22:51,113 INFO L85 PathProgramCache]: Analyzing trace with hash 742957228, now seen corresponding path program 1 times [2025-03-17 14:22:51,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:22:51,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439263366] [2025-03-17 14:22:51,114 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:22:51,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:22:51,118 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-03-17 14:22:51,123 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-03-17 14:22:51,123 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:22:51,123 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:22:51,336 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:22:51,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:22:51,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439263366] [2025-03-17 14:22:51,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439263366] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:22:51,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904900539] [2025-03-17 14:22:51,337 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:22:51,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:22:51,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:22:51,339 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:22:51,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-17 14:22:51,390 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-03-17 14:22:51,402 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-03-17 14:22:51,402 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:22:51,402 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:22:51,404 INFO L256 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-03-17 14:22:51,407 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:22:51,440 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-03-17 14:22:51,493 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:22:51,493 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:22:51,546 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:22:51,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904900539] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:22:51,547 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:22:51,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2025-03-17 14:22:51,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037407075] [2025-03-17 14:22:51,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:22:51,547 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-17 14:22:51,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:22:51,548 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-17 14:22:51,548 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2025-03-17 14:22:51,720 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 60 [2025-03-17 14:22:51,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 54 transitions, 146 flow. Second operand has 9 states, 9 states have (on average 27.666666666666668) internal successors, (249), 9 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:22:51,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:22:51,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 60 [2025-03-17 14:22:51,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:22:52,015 INFO L124 PetriNetUnfolderBase]: 208/431 cut-off events. [2025-03-17 14:22:52,015 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-03-17 14:22:52,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 813 conditions, 431 events. 208/431 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1691 event pairs, 124 based on Foata normal form. 3/360 useless extension candidates. Maximal degree in co-relation 724. Up to 307 conditions per place. [2025-03-17 14:22:52,019 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 41 selfloop transitions, 21 changer transitions 0/81 dead transitions. [2025-03-17 14:22:52,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 81 transitions, 358 flow [2025-03-17 14:22:52,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-17 14:22:52,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-17 14:22:52,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 230 transitions. [2025-03-17 14:22:52,021 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6388888888888888 [2025-03-17 14:22:52,021 INFO L175 Difference]: Start difference. First operand has 52 places, 54 transitions, 146 flow. Second operand 6 states and 230 transitions. [2025-03-17 14:22:52,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 81 transitions, 358 flow [2025-03-17 14:22:52,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 81 transitions, 348 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-17 14:22:52,024 INFO L231 Difference]: Finished difference. Result has 59 places, 69 transitions, 292 flow [2025-03-17 14:22:52,024 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=292, PETRI_PLACES=59, PETRI_TRANSITIONS=69} [2025-03-17 14:22:52,024 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, -1 predicate places. [2025-03-17 14:22:52,024 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 69 transitions, 292 flow [2025-03-17 14:22:52,025 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 27.666666666666668) internal successors, (249), 9 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:22:52,025 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:22:52,025 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2025-03-17 14:22:52,031 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-17 14:22:52,225 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:22:52,225 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2025-03-17 14:22:52,226 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:22:52,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1428645660, now seen corresponding path program 2 times [2025-03-17 14:22:52,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:22:52,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114465896] [2025-03-17 14:22:52,226 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:22:52,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:22:52,233 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 11 statements into 2 equivalence classes. [2025-03-17 14:22:52,242 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 11 of 11 statements. [2025-03-17 14:22:52,242 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:22:52,242 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:22:52,456 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:22:52,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:22:52,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114465896] [2025-03-17 14:22:52,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114465896] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:22:52,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856989698] [2025-03-17 14:22:52,457 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:22:52,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:22:52,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:22:52,459 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:22:52,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-17 14:22:52,506 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 11 statements into 2 equivalence classes. [2025-03-17 14:22:52,521 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 11 of 11 statements. [2025-03-17 14:22:52,521 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:22:52,522 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:22:52,523 INFO L256 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-03-17 14:22:52,524 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:22:52,545 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 [2025-03-17 14:22:52,721 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:22:52,722 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:22:52,968 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:22:52,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856989698] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:22:52,968 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:22:52,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 17 [2025-03-17 14:22:52,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31631993] [2025-03-17 14:22:52,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:22:52,969 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-17 14:22:52,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:22:52,969 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-17 14:22:52,969 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=225, Unknown=0, NotChecked=0, Total=342 [2025-03-17 14:22:53,336 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 60 [2025-03-17 14:22:53,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 69 transitions, 292 flow. Second operand has 19 states, 19 states have (on average 27.68421052631579) internal successors, (526), 19 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:22:53,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:22:53,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 60 [2025-03-17 14:22:53,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:22:53,620 INFO L124 PetriNetUnfolderBase]: 208/428 cut-off events. [2025-03-17 14:22:53,621 INFO L125 PetriNetUnfolderBase]: For 54/54 co-relation queries the response was YES. [2025-03-17 14:22:53,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 844 conditions, 428 events. 208/428 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1690 event pairs, 124 based on Foata normal form. 3/360 useless extension candidates. Maximal degree in co-relation 756. Up to 295 conditions per place. [2025-03-17 14:22:53,623 INFO L140 encePairwiseOnDemand]: 47/60 looper letters, 22 selfloop transitions, 37 changer transitions 0/78 dead transitions. [2025-03-17 14:22:53,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 78 transitions, 404 flow [2025-03-17 14:22:53,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-17 14:22:53,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-03-17 14:22:53,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 348 transitions. [2025-03-17 14:22:53,625 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5272727272727272 [2025-03-17 14:22:53,625 INFO L175 Difference]: Start difference. First operand has 59 places, 69 transitions, 292 flow. Second operand 11 states and 348 transitions. [2025-03-17 14:22:53,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 78 transitions, 404 flow [2025-03-17 14:22:53,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 78 transitions, 330 flow, removed 15 selfloop flow, removed 5 redundant places. [2025-03-17 14:22:53,628 INFO L231 Difference]: Finished difference. Result has 61 places, 78 transitions, 292 flow [2025-03-17 14:22:53,628 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=292, PETRI_PLACES=61, PETRI_TRANSITIONS=78} [2025-03-17 14:22:53,628 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 1 predicate places. [2025-03-17 14:22:53,628 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 78 transitions, 292 flow [2025-03-17 14:22:53,629 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 27.68421052631579) internal successors, (526), 19 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:22:53,629 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:22:53,629 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:22:53,635 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-17 14:22:53,833 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2025-03-17 14:22:53,833 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2025-03-17 14:22:53,833 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:22:53,834 INFO L85 PathProgramCache]: Analyzing trace with hash -29910024, now seen corresponding path program 1 times [2025-03-17 14:22:53,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:22:53,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451328955] [2025-03-17 14:22:53,835 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:22:53,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:22:53,847 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-03-17 14:22:53,861 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-03-17 14:22:53,863 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:22:53,863 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:22:53,925 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-03-17 14:22:53,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:22:53,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451328955] [2025-03-17 14:22:53,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451328955] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:22:53,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748704965] [2025-03-17 14:22:53,925 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:22:53,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:22:53,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:22:53,927 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:22:53,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-17 14:22:53,982 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-03-17 14:22:54,006 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-03-17 14:22:54,007 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:22:54,007 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:22:54,008 INFO L256 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-17 14:22:54,009 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:22:54,041 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-03-17 14:22:54,041 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:22:54,065 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-03-17 14:22:54,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748704965] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:22:54,066 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:22:54,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2025-03-17 14:22:54,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49095371] [2025-03-17 14:22:54,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:22:54,066 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-17 14:22:54,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:22:54,067 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-17 14:22:54,067 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=46, Unknown=0, NotChecked=0, Total=90 [2025-03-17 14:22:54,092 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 60 [2025-03-17 14:22:54,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 78 transitions, 292 flow. Second operand has 10 states, 10 states have (on average 31.6) internal successors, (316), 10 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:22:54,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:22:54,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 60 [2025-03-17 14:22:54,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:22:54,228 INFO L124 PetriNetUnfolderBase]: 202/425 cut-off events. [2025-03-17 14:22:54,229 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-03-17 14:22:54,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 826 conditions, 425 events. 202/425 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1641 event pairs, 124 based on Foata normal form. 9/363 useless extension candidates. Maximal degree in co-relation 692. Up to 296 conditions per place. [2025-03-17 14:22:54,231 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 35 selfloop transitions, 21 changer transitions 0/75 dead transitions. [2025-03-17 14:22:54,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 75 transitions, 380 flow [2025-03-17 14:22:54,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-17 14:22:54,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-17 14:22:54,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 268 transitions. [2025-03-17 14:22:54,237 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.638095238095238 [2025-03-17 14:22:54,238 INFO L175 Difference]: Start difference. First operand has 61 places, 78 transitions, 292 flow. Second operand 7 states and 268 transitions. [2025-03-17 14:22:54,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 75 transitions, 380 flow [2025-03-17 14:22:54,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 75 transitions, 340 flow, removed 4 selfloop flow, removed 6 redundant places. [2025-03-17 14:22:54,239 INFO L231 Difference]: Finished difference. Result has 63 places, 75 transitions, 296 flow [2025-03-17 14:22:54,239 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=296, PETRI_PLACES=63, PETRI_TRANSITIONS=75} [2025-03-17 14:22:54,240 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 3 predicate places. [2025-03-17 14:22:54,240 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 75 transitions, 296 flow [2025-03-17 14:22:54,240 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 31.6) internal successors, (316), 10 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:22:54,240 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:22:54,240 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:22:54,247 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-03-17 14:22:54,440 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:22:54,441 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2025-03-17 14:22:54,441 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:22:54,441 INFO L85 PathProgramCache]: Analyzing trace with hash -1238583781, now seen corresponding path program 2 times [2025-03-17 14:22:54,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:22:54,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008432657] [2025-03-17 14:22:54,441 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:22:54,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:22:54,451 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 38 statements into 2 equivalence classes. [2025-03-17 14:22:54,464 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 8 of 38 statements. [2025-03-17 14:22:54,464 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-17 14:22:54,465 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:22:54,583 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2025-03-17 14:22:54,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:22:54,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008432657] [2025-03-17 14:22:54,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008432657] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:22:54,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:22:54,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-17 14:22:54,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750703990] [2025-03-17 14:22:54,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:22:54,584 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 14:22:54,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:22:54,584 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 14:22:54,584 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-17 14:22:54,610 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 60 [2025-03-17 14:22:54,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 75 transitions, 296 flow. Second operand has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:22:54,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:22:54,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 60 [2025-03-17 14:22:54,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:22:54,711 INFO L124 PetriNetUnfolderBase]: 343/663 cut-off events. [2025-03-17 14:22:54,711 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2025-03-17 14:22:54,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1288 conditions, 663 events. 343/663 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3043 event pairs, 234 based on Foata normal form. 0/581 useless extension candidates. Maximal degree in co-relation 1143. Up to 494 conditions per place. [2025-03-17 14:22:54,715 INFO L140 encePairwiseOnDemand]: 55/60 looper letters, 55 selfloop transitions, 3 changer transitions 0/73 dead transitions. [2025-03-17 14:22:54,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 73 transitions, 408 flow [2025-03-17 14:22:54,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 14:22:54,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-17 14:22:54,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 143 transitions. [2025-03-17 14:22:54,717 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4766666666666667 [2025-03-17 14:22:54,717 INFO L175 Difference]: Start difference. First operand has 63 places, 75 transitions, 296 flow. Second operand 5 states and 143 transitions. [2025-03-17 14:22:54,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 73 transitions, 408 flow [2025-03-17 14:22:54,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 73 transitions, 375 flow, removed 0 selfloop flow, removed 5 redundant places. [2025-03-17 14:22:54,720 INFO L231 Difference]: Finished difference. Result has 60 places, 73 transitions, 265 flow [2025-03-17 14:22:54,720 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=259, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=265, PETRI_PLACES=60, PETRI_TRANSITIONS=73} [2025-03-17 14:22:54,721 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 0 predicate places. [2025-03-17 14:22:54,722 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 73 transitions, 265 flow [2025-03-17 14:22:54,722 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:22:54,722 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:22:54,722 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:22:54,722 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-03-17 14:22:54,722 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2025-03-17 14:22:54,723 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:22:54,723 INFO L85 PathProgramCache]: Analyzing trace with hash -1238583780, now seen corresponding path program 1 times [2025-03-17 14:22:54,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:22:54,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928296810] [2025-03-17 14:22:54,723 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:22:54,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:22:54,735 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 38 statements into 1 equivalence classes. [2025-03-17 14:22:54,775 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 38 of 38 statements. [2025-03-17 14:22:54,776 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:22:54,776 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:22:55,392 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2025-03-17 14:22:55,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:22:55,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928296810] [2025-03-17 14:22:55,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928296810] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:22:55,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304650195] [2025-03-17 14:22:55,392 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:22:55,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:22:55,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:22:55,396 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) [2025-03-17 14:22:55,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-17 14:22:55,465 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 38 statements into 1 equivalence classes. [2025-03-17 14:22:55,505 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 38 of 38 statements. [2025-03-17 14:22:55,506 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:22:55,506 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:22:55,508 INFO L256 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 36 conjuncts are in the unsatisfiable core [2025-03-17 14:22:55,512 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:22:55,522 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 [2025-03-17 14:22:55,525 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-03-17 14:22:55,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-17 14:22:55,611 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 [2025-03-17 14:22:55,623 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-03-17 14:22:55,623 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 [2025-03-17 14:22:55,666 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2025-03-17 14:22:55,667 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 [2025-03-17 14:22:55,965 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2025-03-17 14:22:55,966 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:22:56,421 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2025-03-17 14:22:56,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304650195] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-17 14:22:56,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-17 14:22:56,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8, 9] total 25 [2025-03-17 14:22:56,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948545132] [2025-03-17 14:22:56,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:22:56,422 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-17 14:22:56,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:22:56,422 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-17 14:22:56,423 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=542, Unknown=0, NotChecked=0, Total=702 [2025-03-17 14:22:56,705 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 60 [2025-03-17 14:22:56,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 73 transitions, 265 flow. Second operand has 11 states, 11 states have (on average 28.90909090909091) internal successors, (318), 11 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:22:56,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:22:56,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 60 [2025-03-17 14:22:56,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:22:56,994 INFO L124 PetriNetUnfolderBase]: 459/886 cut-off events. [2025-03-17 14:22:56,994 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-03-17 14:22:56,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1678 conditions, 886 events. 459/886 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 4269 event pairs, 169 based on Foata normal form. 0/749 useless extension candidates. Maximal degree in co-relation 1548. Up to 351 conditions per place. [2025-03-17 14:22:56,999 INFO L140 encePairwiseOnDemand]: 53/60 looper letters, 69 selfloop transitions, 6 changer transitions 0/90 dead transitions. [2025-03-17 14:22:56,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 90 transitions, 454 flow [2025-03-17 14:22:56,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-17 14:22:56,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-17 14:22:57,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 211 transitions. [2025-03-17 14:22:57,000 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5861111111111111 [2025-03-17 14:22:57,000 INFO L175 Difference]: Start difference. First operand has 60 places, 73 transitions, 265 flow. Second operand 6 states and 211 transitions. [2025-03-17 14:22:57,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 90 transitions, 454 flow [2025-03-17 14:22:57,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 90 transitions, 449 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-17 14:22:57,002 INFO L231 Difference]: Finished difference. Result has 64 places, 74 transitions, 285 flow [2025-03-17 14:22:57,002 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=285, PETRI_PLACES=64, PETRI_TRANSITIONS=74} [2025-03-17 14:22:57,002 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 4 predicate places. [2025-03-17 14:22:57,002 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 74 transitions, 285 flow [2025-03-17 14:22:57,005 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 28.90909090909091) internal successors, (318), 11 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:22:57,005 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:22:57,005 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:22:57,011 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-03-17 14:22:57,205 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:22:57,205 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2025-03-17 14:22:57,206 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:22:57,206 INFO L85 PathProgramCache]: Analyzing trace with hash 258609187, now seen corresponding path program 1 times [2025-03-17 14:22:57,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:22:57,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332001579] [2025-03-17 14:22:57,206 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:22:57,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:22:57,218 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 39 statements into 1 equivalence classes. [2025-03-17 14:22:57,239 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 39 of 39 statements. [2025-03-17 14:22:57,240 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:22:57,240 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:22:57,562 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2025-03-17 14:22:57,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:22:57,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332001579] [2025-03-17 14:22:57,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332001579] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:22:57,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359443045] [2025-03-17 14:22:57,564 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:22:57,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:22:57,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:22:57,566 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) [2025-03-17 14:22:57,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-17 14:22:57,629 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 39 statements into 1 equivalence classes. [2025-03-17 14:22:57,666 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 39 of 39 statements. [2025-03-17 14:22:57,666 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:22:57,666 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:22:57,668 INFO L256 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-03-17 14:22:57,671 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:22:57,678 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-03-17 14:22:57,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-17 14:22:57,814 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 16 treesize of output 11 [2025-03-17 14:22:57,821 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-03-17 14:22:57,821 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 [2025-03-17 14:22:57,893 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2025-03-17 14:22:57,893 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:22:57,995 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 52 treesize of output 48 [2025-03-17 14:22:58,208 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2025-03-17 14:22:58,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359443045] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:22:58,209 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:22:58,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 22 [2025-03-17 14:22:58,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418979829] [2025-03-17 14:22:58,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:22:58,209 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-03-17 14:22:58,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:22:58,211 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-03-17 14:22:58,211 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2025-03-17 14:22:59,035 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 60 [2025-03-17 14:22:59,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 74 transitions, 285 flow. Second operand has 23 states, 23 states have (on average 27.26086956521739) internal successors, (627), 23 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:22:59,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:22:59,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 60 [2025-03-17 14:22:59,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:22:59,627 INFO L124 PetriNetUnfolderBase]: 539/1100 cut-off events. [2025-03-17 14:22:59,627 INFO L125 PetriNetUnfolderBase]: For 194/194 co-relation queries the response was YES. [2025-03-17 14:22:59,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2337 conditions, 1100 events. 539/1100 cut-off events. For 194/194 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 5825 event pairs, 169 based on Foata normal form. 52/1071 useless extension candidates. Maximal degree in co-relation 2205. Up to 377 conditions per place. [2025-03-17 14:22:59,634 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 72 selfloop transitions, 19 changer transitions 0/108 dead transitions. [2025-03-17 14:22:59,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 108 transitions, 553 flow [2025-03-17 14:22:59,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-17 14:22:59,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2025-03-17 14:22:59,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 465 transitions. [2025-03-17 14:22:59,636 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5166666666666667 [2025-03-17 14:22:59,636 INFO L175 Difference]: Start difference. First operand has 64 places, 74 transitions, 285 flow. Second operand 15 states and 465 transitions. [2025-03-17 14:22:59,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 108 transitions, 553 flow [2025-03-17 14:22:59,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 108 transitions, 543 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-03-17 14:22:59,638 INFO L231 Difference]: Finished difference. Result has 76 places, 76 transitions, 335 flow [2025-03-17 14:22:59,638 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=277, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=335, PETRI_PLACES=76, PETRI_TRANSITIONS=76} [2025-03-17 14:22:59,641 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 16 predicate places. [2025-03-17 14:22:59,642 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 76 transitions, 335 flow [2025-03-17 14:22:59,642 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 27.26086956521739) internal successors, (627), 23 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:22:59,642 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:22:59,642 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:22:59,650 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-03-17 14:22:59,843 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:22:59,843 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2025-03-17 14:22:59,843 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:22:59,843 INFO L85 PathProgramCache]: Analyzing trace with hash 258609186, now seen corresponding path program 1 times [2025-03-17 14:22:59,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:22:59,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437479421] [2025-03-17 14:22:59,843 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:22:59,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:22:59,852 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 39 statements into 1 equivalence classes. [2025-03-17 14:22:59,862 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 39 of 39 statements. [2025-03-17 14:22:59,863 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:22:59,863 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:22:59,953 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2025-03-17 14:22:59,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:22:59,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437479421] [2025-03-17 14:22:59,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437479421] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:22:59,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:22:59,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-17 14:22:59,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986487816] [2025-03-17 14:22:59,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:22:59,954 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 14:22:59,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:22:59,956 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 14:22:59,956 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-17 14:23:00,019 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 60 [2025-03-17 14:23:00,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 76 transitions, 335 flow. Second operand has 5 states, 5 states have (on average 26.4) internal successors, (132), 5 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:00,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:23:00,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 60 [2025-03-17 14:23:00,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:23:00,140 INFO L124 PetriNetUnfolderBase]: 606/1093 cut-off events. [2025-03-17 14:23:00,141 INFO L125 PetriNetUnfolderBase]: For 684/711 co-relation queries the response was YES. [2025-03-17 14:23:00,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2549 conditions, 1093 events. 606/1093 cut-off events. For 684/711 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 5227 event pairs, 435 based on Foata normal form. 87/1080 useless extension candidates. Maximal degree in co-relation 2402. Up to 882 conditions per place. [2025-03-17 14:23:00,147 INFO L140 encePairwiseOnDemand]: 55/60 looper letters, 56 selfloop transitions, 3 changer transitions 0/74 dead transitions. [2025-03-17 14:23:00,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 74 transitions, 449 flow [2025-03-17 14:23:00,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 14:23:00,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-17 14:23:00,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 147 transitions. [2025-03-17 14:23:00,148 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49 [2025-03-17 14:23:00,148 INFO L175 Difference]: Start difference. First operand has 76 places, 76 transitions, 335 flow. Second operand 5 states and 147 transitions. [2025-03-17 14:23:00,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 74 transitions, 449 flow [2025-03-17 14:23:00,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 74 transitions, 448 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-17 14:23:00,151 INFO L231 Difference]: Finished difference. Result has 77 places, 74 transitions, 336 flow [2025-03-17 14:23:00,152 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=330, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=336, PETRI_PLACES=77, PETRI_TRANSITIONS=74} [2025-03-17 14:23:00,153 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 17 predicate places. [2025-03-17 14:23:00,153 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 74 transitions, 336 flow [2025-03-17 14:23:00,153 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.4) internal successors, (132), 5 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:00,153 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:23:00,153 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:23:00,153 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2025-03-17 14:23:00,153 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2025-03-17 14:23:00,154 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:23:00,154 INFO L85 PathProgramCache]: Analyzing trace with hash -611950210, now seen corresponding path program 1 times [2025-03-17 14:23:00,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:23:00,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783739064] [2025-03-17 14:23:00,154 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:23:00,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:23:00,164 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 40 statements into 1 equivalence classes. [2025-03-17 14:23:00,178 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 40 of 40 statements. [2025-03-17 14:23:00,178 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:23:00,178 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:00,553 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2025-03-17 14:23:00,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:23:00,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783739064] [2025-03-17 14:23:00,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783739064] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:23:00,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356490121] [2025-03-17 14:23:00,553 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:23:00,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:23:00,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:23:00,555 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) [2025-03-17 14:23:00,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-17 14:23:00,621 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 40 statements into 1 equivalence classes. [2025-03-17 14:23:00,652 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 40 of 40 statements. [2025-03-17 14:23:00,652 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:23:00,652 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:00,659 INFO L256 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 46 conjuncts are in the unsatisfiable core [2025-03-17 14:23:00,661 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:23:00,666 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-03-17 14:23:00,669 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 [2025-03-17 14:23:00,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-17 14:23:00,797 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 [2025-03-17 14:23:00,802 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-03-17 14:23:00,802 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 [2025-03-17 14:23:00,848 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2025-03-17 14:23:00,848 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 [2025-03-17 14:23:01,127 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 20 proven. 30 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2025-03-17 14:23:01,128 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:23:01,556 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2025-03-17 14:23:01,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356490121] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-17 14:23:01,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-17 14:23:01,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8, 14] total 30 [2025-03-17 14:23:01,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313607522] [2025-03-17 14:23:01,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:23:01,557 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-17 14:23:01,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:23:01,557 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-17 14:23:01,558 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=812, Unknown=0, NotChecked=0, Total=992 [2025-03-17 14:23:01,775 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 60 [2025-03-17 14:23:01,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 74 transitions, 336 flow. Second operand has 11 states, 11 states have (on average 29.09090909090909) internal successors, (320), 11 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:01,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:23:01,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 60 [2025-03-17 14:23:01,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:23:02,087 INFO L124 PetriNetUnfolderBase]: 1093/1964 cut-off events. [2025-03-17 14:23:02,087 INFO L125 PetriNetUnfolderBase]: For 1295/1348 co-relation queries the response was YES. [2025-03-17 14:23:02,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4497 conditions, 1964 events. 1093/1964 cut-off events. For 1295/1348 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 11179 event pairs, 458 based on Foata normal form. 0/1721 useless extension candidates. Maximal degree in co-relation 4348. Up to 853 conditions per place. [2025-03-17 14:23:02,097 INFO L140 encePairwiseOnDemand]: 53/60 looper letters, 71 selfloop transitions, 6 changer transitions 0/91 dead transitions. [2025-03-17 14:23:02,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 91 transitions, 552 flow [2025-03-17 14:23:02,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-17 14:23:02,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-17 14:23:02,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 209 transitions. [2025-03-17 14:23:02,101 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5805555555555556 [2025-03-17 14:23:02,101 INFO L175 Difference]: Start difference. First operand has 77 places, 74 transitions, 336 flow. Second operand 6 states and 209 transitions. [2025-03-17 14:23:02,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 91 transitions, 552 flow [2025-03-17 14:23:02,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 91 transitions, 547 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-17 14:23:02,103 INFO L231 Difference]: Finished difference. Result has 81 places, 75 transitions, 356 flow [2025-03-17 14:23:02,104 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=331, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=356, PETRI_PLACES=81, PETRI_TRANSITIONS=75} [2025-03-17 14:23:02,105 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 21 predicate places. [2025-03-17 14:23:02,105 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 75 transitions, 356 flow [2025-03-17 14:23:02,105 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 29.09090909090909) internal successors, (320), 11 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:02,106 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:23:02,106 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:23:02,112 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-03-17 14:23:02,310 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:23:02,310 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2025-03-17 14:23:02,310 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:23:02,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1790586615, now seen corresponding path program 1 times [2025-03-17 14:23:02,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:23:02,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221711083] [2025-03-17 14:23:02,311 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:23:02,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:23:02,319 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 41 statements into 1 equivalence classes. [2025-03-17 14:23:02,325 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 41 of 41 statements. [2025-03-17 14:23:02,325 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:23:02,325 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:02,369 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2025-03-17 14:23:02,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:23:02,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221711083] [2025-03-17 14:23:02,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221711083] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:23:02,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:23:02,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-17 14:23:02,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122187431] [2025-03-17 14:23:02,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:23:02,370 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 14:23:02,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:23:02,371 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 14:23:02,371 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-17 14:23:02,389 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 60 [2025-03-17 14:23:02,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 75 transitions, 356 flow. Second operand has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:02,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:23:02,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 60 [2025-03-17 14:23:02,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:23:02,530 INFO L124 PetriNetUnfolderBase]: 740/1377 cut-off events. [2025-03-17 14:23:02,530 INFO L125 PetriNetUnfolderBase]: For 1242/1309 co-relation queries the response was YES. [2025-03-17 14:23:02,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3510 conditions, 1377 events. 740/1377 cut-off events. For 1242/1309 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 7334 event pairs, 590 based on Foata normal form. 44/1306 useless extension candidates. Maximal degree in co-relation 3359. Up to 1093 conditions per place. [2025-03-17 14:23:02,537 INFO L140 encePairwiseOnDemand]: 56/60 looper letters, 56 selfloop transitions, 2 changer transitions 0/73 dead transitions. [2025-03-17 14:23:02,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 73 transitions, 468 flow [2025-03-17 14:23:02,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 14:23:02,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-17 14:23:02,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 127 transitions. [2025-03-17 14:23:02,538 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5291666666666667 [2025-03-17 14:23:02,538 INFO L175 Difference]: Start difference. First operand has 81 places, 75 transitions, 356 flow. Second operand 4 states and 127 transitions. [2025-03-17 14:23:02,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 73 transitions, 468 flow [2025-03-17 14:23:02,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 73 transitions, 460 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-03-17 14:23:02,540 INFO L231 Difference]: Finished difference. Result has 78 places, 73 transitions, 348 flow [2025-03-17 14:23:02,540 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=344, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=348, PETRI_PLACES=78, PETRI_TRANSITIONS=73} [2025-03-17 14:23:02,541 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 18 predicate places. [2025-03-17 14:23:02,541 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 73 transitions, 348 flow [2025-03-17 14:23:02,541 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:02,541 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:23:02,541 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:23:02,541 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2025-03-17 14:23:02,541 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2025-03-17 14:23:02,541 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:23:02,541 INFO L85 PathProgramCache]: Analyzing trace with hash -1790586614, now seen corresponding path program 1 times [2025-03-17 14:23:02,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:23:02,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925259463] [2025-03-17 14:23:02,542 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:23:02,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:23:02,549 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 41 statements into 1 equivalence classes. [2025-03-17 14:23:02,557 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 41 of 41 statements. [2025-03-17 14:23:02,557 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:23:02,557 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:02,710 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2025-03-17 14:23:02,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:23:02,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925259463] [2025-03-17 14:23:02,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925259463] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:23:02,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653490994] [2025-03-17 14:23:02,710 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:23:02,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:23:02,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:23:02,712 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) [2025-03-17 14:23:02,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-17 14:23:02,773 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 41 statements into 1 equivalence classes. [2025-03-17 14:23:02,804 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 41 of 41 statements. [2025-03-17 14:23:02,804 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:23:02,804 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:02,806 INFO L256 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 48 conjuncts are in the unsatisfiable core [2025-03-17 14:23:02,808 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:23:02,848 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 [2025-03-17 14:23:02,959 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2025-03-17 14:23:02,959 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 [2025-03-17 14:23:03,011 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 20 proven. 30 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2025-03-17 14:23:03,011 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:23:03,095 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2025-03-17 14:23:03,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653490994] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-17 14:23:03,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-17 14:23:03,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 15] total 20 [2025-03-17 14:23:03,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599421470] [2025-03-17 14:23:03,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:23:03,096 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 14:23:03,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:23:03,096 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 14:23:03,096 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2025-03-17 14:23:03,144 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 60 [2025-03-17 14:23:03,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 73 transitions, 348 flow. Second operand has 5 states, 5 states have (on average 31.0) internal successors, (155), 5 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:03,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:23:03,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 60 [2025-03-17 14:23:03,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:23:03,345 INFO L124 PetriNetUnfolderBase]: 942/1690 cut-off events. [2025-03-17 14:23:03,346 INFO L125 PetriNetUnfolderBase]: For 1343/1388 co-relation queries the response was YES. [2025-03-17 14:23:03,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4317 conditions, 1690 events. 942/1690 cut-off events. For 1343/1388 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9236 event pairs, 458 based on Foata normal form. 65/1628 useless extension candidates. Maximal degree in co-relation 4167. Up to 918 conditions per place. [2025-03-17 14:23:03,353 INFO L140 encePairwiseOnDemand]: 55/60 looper letters, 72 selfloop transitions, 4 changer transitions 0/90 dead transitions. [2025-03-17 14:23:03,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 90 transitions, 565 flow [2025-03-17 14:23:03,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 14:23:03,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-17 14:23:03,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 186 transitions. [2025-03-17 14:23:03,354 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.62 [2025-03-17 14:23:03,354 INFO L175 Difference]: Start difference. First operand has 78 places, 73 transitions, 348 flow. Second operand 5 states and 186 transitions. [2025-03-17 14:23:03,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 90 transitions, 565 flow [2025-03-17 14:23:03,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 90 transitions, 562 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-17 14:23:03,357 INFO L231 Difference]: Finished difference. Result has 81 places, 74 transitions, 364 flow [2025-03-17 14:23:03,357 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=345, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=364, PETRI_PLACES=81, PETRI_TRANSITIONS=74} [2025-03-17 14:23:03,358 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 21 predicate places. [2025-03-17 14:23:03,358 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 74 transitions, 364 flow [2025-03-17 14:23:03,358 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.0) internal successors, (155), 5 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:03,358 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:23:03,358 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:23:03,365 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-03-17 14:23:03,562 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:23:03,562 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2025-03-17 14:23:03,562 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:23:03,562 INFO L85 PathProgramCache]: Analyzing trace with hash -584649208, now seen corresponding path program 1 times [2025-03-17 14:23:03,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:23:03,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739274787] [2025-03-17 14:23:03,562 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:23:03,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:23:03,572 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 41 statements into 1 equivalence classes. [2025-03-17 14:23:03,585 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 41 of 41 statements. [2025-03-17 14:23:03,585 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:23:03,585 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:04,190 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 29 proven. 23 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2025-03-17 14:23:04,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:23:04,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739274787] [2025-03-17 14:23:04,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739274787] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:23:04,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376368604] [2025-03-17 14:23:04,191 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:23:04,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:23:04,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:23:04,193 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) [2025-03-17 14:23:04,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-17 14:23:04,260 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 41 statements into 1 equivalence classes. [2025-03-17 14:23:04,295 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 41 of 41 statements. [2025-03-17 14:23:04,295 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:23:04,295 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:04,297 INFO L256 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 51 conjuncts are in the unsatisfiable core [2025-03-17 14:23:04,300 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:23:04,306 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 [2025-03-17 14:23:04,309 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-03-17 14:23:04,437 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2025-03-17 14:23:04,437 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 19 treesize of output 16 [2025-03-17 14:23:04,443 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 [2025-03-17 14:23:04,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-17 14:23:04,671 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2025-03-17 14:23:04,671 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 21 [2025-03-17 14:23:04,678 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-03-17 14:23:04,678 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 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 [2025-03-17 14:23:04,737 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 20 proven. 32 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2025-03-17 14:23:04,738 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:23:05,339 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 25 proven. 2 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2025-03-17 14:23:05,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376368604] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:23:05,339 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:23:05,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 10] total 37 [2025-03-17 14:23:05,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263561284] [2025-03-17 14:23:05,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:23:05,339 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2025-03-17 14:23:05,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:23:05,340 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2025-03-17 14:23:05,341 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=1245, Unknown=0, NotChecked=0, Total=1482 [2025-03-17 14:23:06,760 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 60 [2025-03-17 14:23:06,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 74 transitions, 364 flow. Second operand has 39 states, 39 states have (on average 20.076923076923077) internal successors, (783), 39 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:06,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:23:06,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 60 [2025-03-17 14:23:06,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:23:07,922 INFO L124 PetriNetUnfolderBase]: 2404/4060 cut-off events. [2025-03-17 14:23:07,922 INFO L125 PetriNetUnfolderBase]: For 4820/4980 co-relation queries the response was YES. [2025-03-17 14:23:07,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10986 conditions, 4060 events. 2404/4060 cut-off events. For 4820/4980 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 22927 event pairs, 437 based on Foata normal form. 174/4182 useless extension candidates. Maximal degree in co-relation 10820. Up to 795 conditions per place. [2025-03-17 14:23:07,944 INFO L140 encePairwiseOnDemand]: 49/60 looper letters, 122 selfloop transitions, 25 changer transitions 0/157 dead transitions. [2025-03-17 14:23:07,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 157 transitions, 961 flow [2025-03-17 14:23:07,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-03-17 14:23:07,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2025-03-17 14:23:07,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 482 transitions. [2025-03-17 14:23:07,946 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.42280701754385963 [2025-03-17 14:23:07,946 INFO L175 Difference]: Start difference. First operand has 81 places, 74 transitions, 364 flow. Second operand 19 states and 482 transitions. [2025-03-17 14:23:07,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 157 transitions, 961 flow [2025-03-17 14:23:07,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 157 transitions, 947 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-17 14:23:07,951 INFO L231 Difference]: Finished difference. Result has 102 places, 79 transitions, 472 flow [2025-03-17 14:23:07,951 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=358, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=472, PETRI_PLACES=102, PETRI_TRANSITIONS=79} [2025-03-17 14:23:07,951 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 42 predicate places. [2025-03-17 14:23:07,951 INFO L471 AbstractCegarLoop]: Abstraction has has 102 places, 79 transitions, 472 flow [2025-03-17 14:23:07,952 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 20.076923076923077) internal successors, (783), 39 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:07,952 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:23:07,952 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:23:07,959 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-03-17 14:23:08,152 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,SelfDestructingSolverStorable12 [2025-03-17 14:23:08,153 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2025-03-17 14:23:08,153 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:23:08,154 INFO L85 PathProgramCache]: Analyzing trace with hash 279952285, now seen corresponding path program 1 times [2025-03-17 14:23:08,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:23:08,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817437123] [2025-03-17 14:23:08,154 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:23:08,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:23:08,162 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 42 statements into 1 equivalence classes. [2025-03-17 14:23:08,172 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 42 of 42 statements. [2025-03-17 14:23:08,172 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:23:08,172 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:08,350 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2025-03-17 14:23:08,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:23:08,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817437123] [2025-03-17 14:23:08,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817437123] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:23:08,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558029082] [2025-03-17 14:23:08,350 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:23:08,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:23:08,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:23:08,352 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) [2025-03-17 14:23:08,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-17 14:23:08,420 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 42 statements into 1 equivalence classes. [2025-03-17 14:23:08,456 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 42 of 42 statements. [2025-03-17 14:23:08,456 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:23:08,456 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:08,462 INFO L256 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 42 conjuncts are in the unsatisfiable core [2025-03-17 14:23:08,464 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:23:08,509 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 [2025-03-17 14:23:08,632 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2025-03-17 14:23:08,632 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 21 treesize of output 18 [2025-03-17 14:23:08,684 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 20 proven. 30 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2025-03-17 14:23:08,685 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:23:09,018 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2025-03-17 14:23:09,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558029082] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-17 14:23:09,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-17 14:23:09,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [6, 14] total 25 [2025-03-17 14:23:09,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474007665] [2025-03-17 14:23:09,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:23:09,019 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-17 14:23:09,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:23:09,019 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-17 14:23:09,020 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2025-03-17 14:23:09,244 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 60 [2025-03-17 14:23:09,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 79 transitions, 472 flow. Second operand has 10 states, 10 states have (on average 29.5) internal successors, (295), 10 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:09,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:23:09,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 60 [2025-03-17 14:23:09,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:23:09,662 INFO L124 PetriNetUnfolderBase]: 2511/4256 cut-off events. [2025-03-17 14:23:09,663 INFO L125 PetriNetUnfolderBase]: For 7764/8203 co-relation queries the response was YES. [2025-03-17 14:23:09,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12043 conditions, 4256 events. 2511/4256 cut-off events. For 7764/8203 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 26270 event pairs, 1256 based on Foata normal form. 0/4000 useless extension candidates. Maximal degree in co-relation 11970. Up to 2119 conditions per place. [2025-03-17 14:23:09,684 INFO L140 encePairwiseOnDemand]: 53/60 looper letters, 76 selfloop transitions, 6 changer transitions 0/96 dead transitions. [2025-03-17 14:23:09,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 96 transitions, 735 flow [2025-03-17 14:23:09,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-17 14:23:09,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-17 14:23:09,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 207 transitions. [2025-03-17 14:23:09,690 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.575 [2025-03-17 14:23:09,690 INFO L175 Difference]: Start difference. First operand has 102 places, 79 transitions, 472 flow. Second operand 6 states and 207 transitions. [2025-03-17 14:23:09,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 96 transitions, 735 flow [2025-03-17 14:23:09,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 96 transitions, 713 flow, removed 4 selfloop flow, removed 4 redundant places. [2025-03-17 14:23:09,695 INFO L231 Difference]: Finished difference. Result has 105 places, 80 transitions, 485 flow [2025-03-17 14:23:09,696 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=460, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=485, PETRI_PLACES=105, PETRI_TRANSITIONS=80} [2025-03-17 14:23:09,697 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 45 predicate places. [2025-03-17 14:23:09,697 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 80 transitions, 485 flow [2025-03-17 14:23:09,697 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 29.5) internal successors, (295), 10 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:09,697 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:23:09,697 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:23:09,703 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-03-17 14:23:09,901 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,SelfDestructingSolverStorable13 [2025-03-17 14:23:09,901 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2025-03-17 14:23:09,901 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:23:09,901 INFO L85 PathProgramCache]: Analyzing trace with hash 88586964, now seen corresponding path program 1 times [2025-03-17 14:23:09,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:23:09,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458269596] [2025-03-17 14:23:09,902 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:23:09,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:23:09,910 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 43 statements into 1 equivalence classes. [2025-03-17 14:23:09,919 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 43 of 43 statements. [2025-03-17 14:23:09,919 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:23:09,919 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:10,142 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2025-03-17 14:23:10,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:23:10,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458269596] [2025-03-17 14:23:10,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458269596] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:23:10,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105922915] [2025-03-17 14:23:10,143 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:23:10,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:23:10,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:23:10,145 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) [2025-03-17 14:23:10,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-17 14:23:10,220 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 43 statements into 1 equivalence classes. [2025-03-17 14:23:10,250 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 43 of 43 statements. [2025-03-17 14:23:10,251 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:23:10,251 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:10,252 INFO L256 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 48 conjuncts are in the unsatisfiable core [2025-03-17 14:23:10,254 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:23:10,307 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 [2025-03-17 14:23:10,427 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2025-03-17 14:23:10,427 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 [2025-03-17 14:23:10,482 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 20 proven. 30 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2025-03-17 14:23:10,482 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:23:10,569 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2025-03-17 14:23:10,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105922915] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-17 14:23:10,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-17 14:23:10,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9, 15] total 24 [2025-03-17 14:23:10,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381099342] [2025-03-17 14:23:10,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:23:10,569 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 14:23:10,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:23:10,569 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 14:23:10,570 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2025-03-17 14:23:10,631 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 60 [2025-03-17 14:23:10,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 80 transitions, 485 flow. Second operand has 5 states, 5 states have (on average 31.4) internal successors, (157), 5 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:10,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:23:10,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 60 [2025-03-17 14:23:10,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:23:10,954 INFO L124 PetriNetUnfolderBase]: 2185/4048 cut-off events. [2025-03-17 14:23:10,954 INFO L125 PetriNetUnfolderBase]: For 5872/6241 co-relation queries the response was YES. [2025-03-17 14:23:10,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11870 conditions, 4048 events. 2185/4048 cut-off events. For 5872/6241 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 26810 event pairs, 1256 based on Foata normal form. 145/4091 useless extension candidates. Maximal degree in co-relation 11794. Up to 2264 conditions per place. [2025-03-17 14:23:10,971 INFO L140 encePairwiseOnDemand]: 55/60 looper letters, 77 selfloop transitions, 4 changer transitions 0/97 dead transitions. [2025-03-17 14:23:10,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 97 transitions, 740 flow [2025-03-17 14:23:10,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 14:23:10,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-17 14:23:10,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 184 transitions. [2025-03-17 14:23:10,973 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6133333333333333 [2025-03-17 14:23:10,973 INFO L175 Difference]: Start difference. First operand has 105 places, 80 transitions, 485 flow. Second operand 5 states and 184 transitions. [2025-03-17 14:23:10,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 97 transitions, 740 flow [2025-03-17 14:23:10,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 97 transitions, 731 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-03-17 14:23:10,980 INFO L231 Difference]: Finished difference. Result has 106 places, 81 transitions, 496 flow [2025-03-17 14:23:10,980 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=477, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=496, PETRI_PLACES=106, PETRI_TRANSITIONS=81} [2025-03-17 14:23:10,980 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 46 predicate places. [2025-03-17 14:23:10,980 INFO L471 AbstractCegarLoop]: Abstraction has has 106 places, 81 transitions, 496 flow [2025-03-17 14:23:10,980 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 5 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:10,980 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:23:10,981 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:23:10,987 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-03-17 14:23:11,181 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,SelfDestructingSolverStorable14 [2025-03-17 14:23:11,182 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2025-03-17 14:23:11,182 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:23:11,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1528175183, now seen corresponding path program 1 times [2025-03-17 14:23:11,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:23:11,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708916457] [2025-03-17 14:23:11,182 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:23:11,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:23:11,192 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 43 statements into 1 equivalence classes. [2025-03-17 14:23:11,203 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 43 of 43 statements. [2025-03-17 14:23:11,203 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:23:11,203 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:11,651 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 29 proven. 23 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2025-03-17 14:23:11,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:23:11,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708916457] [2025-03-17 14:23:11,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708916457] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:23:11,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569342642] [2025-03-17 14:23:11,652 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:23:11,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:23:11,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:23:11,653 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) [2025-03-17 14:23:11,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-17 14:23:11,725 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 43 statements into 1 equivalence classes. [2025-03-17 14:23:11,755 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 43 of 43 statements. [2025-03-17 14:23:11,755 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:23:11,755 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:11,758 INFO L256 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 51 conjuncts are in the unsatisfiable core [2025-03-17 14:23:11,760 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:23:11,764 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 [2025-03-17 14:23:11,766 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-03-17 14:23:11,902 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2025-03-17 14:23:11,903 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 19 treesize of output 16 [2025-03-17 14:23:11,908 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 [2025-03-17 14:23:12,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-17 14:23:12,125 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2025-03-17 14:23:12,125 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 21 [2025-03-17 14:23:12,129 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-03-17 14:23:12,130 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 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 [2025-03-17 14:23:12,193 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 20 proven. 32 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2025-03-17 14:23:12,193 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:23:12,806 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 25 proven. 2 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2025-03-17 14:23:12,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569342642] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:23:12,806 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:23:12,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 10] total 37 [2025-03-17 14:23:12,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236508194] [2025-03-17 14:23:12,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:23:12,807 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2025-03-17 14:23:12,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:23:12,807 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2025-03-17 14:23:12,808 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=1245, Unknown=0, NotChecked=0, Total=1482 [2025-03-17 14:23:14,148 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 60 [2025-03-17 14:23:14,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 81 transitions, 496 flow. Second operand has 39 states, 39 states have (on average 20.17948717948718) internal successors, (787), 39 states have internal predecessors, (787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:14,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:23:14,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 60 [2025-03-17 14:23:14,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:23:15,900 INFO L124 PetriNetUnfolderBase]: 7919/13347 cut-off events. [2025-03-17 14:23:15,901 INFO L125 PetriNetUnfolderBase]: For 28094/29312 co-relation queries the response was YES. [2025-03-17 14:23:15,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41412 conditions, 13347 events. 7919/13347 cut-off events. For 28094/29312 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 94296 event pairs, 1596 based on Foata normal form. 615/13819 useless extension candidates. Maximal degree in co-relation 41335. Up to 2687 conditions per place. [2025-03-17 14:23:15,973 INFO L140 encePairwiseOnDemand]: 49/60 looper letters, 134 selfloop transitions, 25 changer transitions 0/170 dead transitions. [2025-03-17 14:23:15,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 170 transitions, 1299 flow [2025-03-17 14:23:15,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-03-17 14:23:15,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2025-03-17 14:23:15,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 474 transitions. [2025-03-17 14:23:15,975 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.41578947368421054 [2025-03-17 14:23:15,975 INFO L175 Difference]: Start difference. First operand has 106 places, 81 transitions, 496 flow. Second operand 19 states and 474 transitions. [2025-03-17 14:23:15,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 170 transitions, 1299 flow [2025-03-17 14:23:15,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 170 transitions, 1285 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-17 14:23:15,994 INFO L231 Difference]: Finished difference. Result has 125 places, 84 transitions, 578 flow [2025-03-17 14:23:15,994 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=490, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=578, PETRI_PLACES=125, PETRI_TRANSITIONS=84} [2025-03-17 14:23:15,995 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 65 predicate places. [2025-03-17 14:23:15,995 INFO L471 AbstractCegarLoop]: Abstraction has has 125 places, 84 transitions, 578 flow [2025-03-17 14:23:15,995 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 20.17948717948718) internal successors, (787), 39 states have internal predecessors, (787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:15,995 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:23:15,995 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:23:16,002 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2025-03-17 14:23:16,196 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,SelfDestructingSolverStorable15 [2025-03-17 14:23:16,196 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2025-03-17 14:23:16,196 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:23:16,196 INFO L85 PathProgramCache]: Analyzing trace with hash 128791129, now seen corresponding path program 1 times [2025-03-17 14:23:16,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:23:16,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321227638] [2025-03-17 14:23:16,197 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:23:16,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:23:16,211 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 44 statements into 1 equivalence classes. [2025-03-17 14:23:16,222 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 44 of 44 statements. [2025-03-17 14:23:16,222 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:23:16,222 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:16,522 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 16 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2025-03-17 14:23:16,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:23:16,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321227638] [2025-03-17 14:23:16,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321227638] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:23:16,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965771979] [2025-03-17 14:23:16,523 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:23:16,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:23:16,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:23:16,525 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) [2025-03-17 14:23:16,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-17 14:23:16,599 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 44 statements into 1 equivalence classes. [2025-03-17 14:23:16,631 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 44 of 44 statements. [2025-03-17 14:23:16,631 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:23:16,631 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:16,633 INFO L256 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 40 conjuncts are in the unsatisfiable core [2025-03-17 14:23:16,634 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:23:16,645 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 [2025-03-17 14:23:16,742 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2025-03-17 14:23:16,742 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 [2025-03-17 14:23:16,800 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 20 proven. 8 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2025-03-17 14:23:16,800 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:23:16,887 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2025-03-17 14:23:16,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965771979] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:23:16,887 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:23:16,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 5] total 22 [2025-03-17 14:23:16,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637568186] [2025-03-17 14:23:16,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:23:16,888 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-03-17 14:23:16,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:23:16,888 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-03-17 14:23:16,888 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2025-03-17 14:23:17,600 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 60 [2025-03-17 14:23:17,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 84 transitions, 578 flow. Second operand has 23 states, 23 states have (on average 27.217391304347824) internal successors, (626), 23 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:17,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:23:17,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 60 [2025-03-17 14:23:17,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:23:18,631 INFO L124 PetriNetUnfolderBase]: 4434/8346 cut-off events. [2025-03-17 14:23:18,631 INFO L125 PetriNetUnfolderBase]: For 18086/18832 co-relation queries the response was YES. [2025-03-17 14:23:18,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27133 conditions, 8346 events. 4434/8346 cut-off events. For 18086/18832 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 62471 event pairs, 1123 based on Foata normal form. 471/8593 useless extension candidates. Maximal degree in co-relation 27047. Up to 2170 conditions per place. [2025-03-17 14:23:18,669 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 119 selfloop transitions, 21 changer transitions 0/157 dead transitions. [2025-03-17 14:23:18,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 157 transitions, 1237 flow [2025-03-17 14:23:18,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-17 14:23:18,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-03-17 14:23:18,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 417 transitions. [2025-03-17 14:23:18,671 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5791666666666667 [2025-03-17 14:23:18,671 INFO L175 Difference]: Start difference. First operand has 125 places, 84 transitions, 578 flow. Second operand 12 states and 417 transitions. [2025-03-17 14:23:18,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 157 transitions, 1237 flow [2025-03-17 14:23:18,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 157 transitions, 1194 flow, removed 2 selfloop flow, removed 14 redundant places. [2025-03-17 14:23:18,696 INFO L231 Difference]: Finished difference. Result has 125 places, 85 transitions, 602 flow [2025-03-17 14:23:18,696 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=535, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=602, PETRI_PLACES=125, PETRI_TRANSITIONS=85} [2025-03-17 14:23:18,697 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 65 predicate places. [2025-03-17 14:23:18,697 INFO L471 AbstractCegarLoop]: Abstraction has has 125 places, 85 transitions, 602 flow [2025-03-17 14:23:18,697 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 27.217391304347824) internal successors, (626), 23 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:18,697 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:23:18,697 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:23:18,704 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2025-03-17 14:23:18,897 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,SelfDestructingSolverStorable16 [2025-03-17 14:23:18,898 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2025-03-17 14:23:18,898 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:23:18,898 INFO L85 PathProgramCache]: Analyzing trace with hash 1719154595, now seen corresponding path program 1 times [2025-03-17 14:23:18,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:23:18,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944805108] [2025-03-17 14:23:18,898 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:23:18,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:23:18,906 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 45 statements into 1 equivalence classes. [2025-03-17 14:23:18,917 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 45 of 45 statements. [2025-03-17 14:23:18,917 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:23:18,918 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:19,143 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2025-03-17 14:23:19,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:23:19,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944805108] [2025-03-17 14:23:19,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944805108] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:23:19,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359248616] [2025-03-17 14:23:19,144 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:23:19,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:23:19,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:23:19,146 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) [2025-03-17 14:23:19,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-17 14:23:19,222 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 45 statements into 1 equivalence classes. [2025-03-17 14:23:19,254 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 45 of 45 statements. [2025-03-17 14:23:19,254 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:23:19,254 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:19,259 INFO L256 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 53 conjuncts are in the unsatisfiable core [2025-03-17 14:23:19,260 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:23:19,296 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-03-17 14:23:19,299 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 [2025-03-17 14:23:19,352 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-03-17 14:23:19,352 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 [2025-03-17 14:23:19,359 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 [2025-03-17 14:23:19,655 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 20 proven. 39 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2025-03-17 14:23:19,655 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:23:19,981 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2025-03-17 14:23:19,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359248616] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:23:19,982 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:23:19,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 16, 11] total 33 [2025-03-17 14:23:19,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46399713] [2025-03-17 14:23:19,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:23:19,982 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2025-03-17 14:23:19,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:23:19,983 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2025-03-17 14:23:19,983 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=916, Unknown=0, NotChecked=0, Total=1122 [2025-03-17 14:23:21,319 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 60 [2025-03-17 14:23:21,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 85 transitions, 602 flow. Second operand has 34 states, 34 states have (on average 27.029411764705884) internal successors, (919), 34 states have internal predecessors, (919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:21,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:23:21,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 60 [2025-03-17 14:23:21,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:23:23,119 INFO L124 PetriNetUnfolderBase]: 5308/9936 cut-off events. [2025-03-17 14:23:23,119 INFO L125 PetriNetUnfolderBase]: For 31522/32755 co-relation queries the response was YES. [2025-03-17 14:23:23,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34877 conditions, 9936 events. 5308/9936 cut-off events. For 31522/32755 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 75273 event pairs, 1028 based on Foata normal form. 402/10172 useless extension candidates. Maximal degree in co-relation 34789. Up to 2057 conditions per place. [2025-03-17 14:23:23,191 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 150 selfloop transitions, 25 changer transitions 0/192 dead transitions. [2025-03-17 14:23:23,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 192 transitions, 1600 flow [2025-03-17 14:23:23,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-03-17 14:23:23,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2025-03-17 14:23:23,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 648 transitions. [2025-03-17 14:23:23,193 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.54 [2025-03-17 14:23:23,193 INFO L175 Difference]: Start difference. First operand has 125 places, 85 transitions, 602 flow. Second operand 20 states and 648 transitions. [2025-03-17 14:23:23,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 192 transitions, 1600 flow [2025-03-17 14:23:23,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 192 transitions, 1508 flow, removed 6 selfloop flow, removed 10 redundant places. [2025-03-17 14:23:23,229 INFO L231 Difference]: Finished difference. Result has 137 places, 87 transitions, 642 flow [2025-03-17 14:23:23,229 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=560, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=642, PETRI_PLACES=137, PETRI_TRANSITIONS=87} [2025-03-17 14:23:23,230 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 77 predicate places. [2025-03-17 14:23:23,230 INFO L471 AbstractCegarLoop]: Abstraction has has 137 places, 87 transitions, 642 flow [2025-03-17 14:23:23,230 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 27.029411764705884) internal successors, (919), 34 states have internal predecessors, (919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:23,230 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:23:23,230 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:23:23,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2025-03-17 14:23:23,435 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,SelfDestructingSolverStorable17 [2025-03-17 14:23:23,435 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2025-03-17 14:23:23,435 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:23:23,435 INFO L85 PathProgramCache]: Analyzing trace with hash -767247687, now seen corresponding path program 1 times [2025-03-17 14:23:23,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:23:23,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524763811] [2025-03-17 14:23:23,435 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:23:23,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:23:23,445 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 45 statements into 1 equivalence classes. [2025-03-17 14:23:23,457 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 45 of 45 statements. [2025-03-17 14:23:23,457 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:23:23,457 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:23,722 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2025-03-17 14:23:23,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:23:23,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524763811] [2025-03-17 14:23:23,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524763811] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:23:23,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481924499] [2025-03-17 14:23:23,723 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:23:23,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:23:23,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:23:23,725 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) [2025-03-17 14:23:23,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-03-17 14:23:23,804 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 45 statements into 1 equivalence classes. [2025-03-17 14:23:23,832 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 45 of 45 statements. [2025-03-17 14:23:23,832 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:23:23,832 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:23,833 INFO L256 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-03-17 14:23:23,834 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:23:23,837 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-03-17 14:23:23,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-17 14:23:23,914 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 16 treesize of output 11 [2025-03-17 14:23:23,918 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-03-17 14:23:23,918 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 [2025-03-17 14:23:23,990 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2025-03-17 14:23:23,990 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:23:24,087 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 52 treesize of output 48 [2025-03-17 14:23:24,231 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2025-03-17 14:23:24,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481924499] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:23:24,231 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:23:24,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 10] total 25 [2025-03-17 14:23:24,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513239364] [2025-03-17 14:23:24,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:23:24,231 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-03-17 14:23:24,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:23:24,232 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-03-17 14:23:24,232 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2025-03-17 14:23:28,299 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2025-03-17 14:23:29,273 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 60 [2025-03-17 14:23:29,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 87 transitions, 642 flow. Second operand has 26 states, 26 states have (on average 25.692307692307693) internal successors, (668), 26 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:29,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:23:29,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 60 [2025-03-17 14:23:29,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:23:31,757 INFO L124 PetriNetUnfolderBase]: 14634/24832 cut-off events. [2025-03-17 14:23:31,758 INFO L125 PetriNetUnfolderBase]: For 82868/85442 co-relation queries the response was YES. [2025-03-17 14:23:31,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85712 conditions, 24832 events. 14634/24832 cut-off events. For 82868/85442 co-relation queries the response was YES. Maximal size of possible extension queue 759. Compared 196371 event pairs, 3459 based on Foata normal form. 1146/25836 useless extension candidates. Maximal degree in co-relation 85620. Up to 5626 conditions per place. [2025-03-17 14:23:31,895 INFO L140 encePairwiseOnDemand]: 49/60 looper letters, 139 selfloop transitions, 22 changer transitions 0/176 dead transitions. [2025-03-17 14:23:31,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 176 transitions, 1673 flow [2025-03-17 14:23:31,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-03-17 14:23:31,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2025-03-17 14:23:31,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 504 transitions. [2025-03-17 14:23:31,896 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49411764705882355 [2025-03-17 14:23:31,896 INFO L175 Difference]: Start difference. First operand has 137 places, 87 transitions, 642 flow. Second operand 17 states and 504 transitions. [2025-03-17 14:23:31,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 176 transitions, 1673 flow [2025-03-17 14:23:31,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 176 transitions, 1612 flow, removed 0 selfloop flow, removed 14 redundant places. [2025-03-17 14:23:31,934 INFO L231 Difference]: Finished difference. Result has 143 places, 90 transitions, 687 flow [2025-03-17 14:23:31,934 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=605, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=687, PETRI_PLACES=143, PETRI_TRANSITIONS=90} [2025-03-17 14:23:31,934 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 83 predicate places. [2025-03-17 14:23:31,934 INFO L471 AbstractCegarLoop]: Abstraction has has 143 places, 90 transitions, 687 flow [2025-03-17 14:23:31,935 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 25.692307692307693) internal successors, (668), 26 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:31,935 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:23:31,935 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:23:31,941 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2025-03-17 14:23:32,135 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:23:32,135 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2025-03-17 14:23:32,136 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:23:32,136 INFO L85 PathProgramCache]: Analyzing trace with hash 1985126200, now seen corresponding path program 1 times [2025-03-17 14:23:32,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:23:32,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235418507] [2025-03-17 14:23:32,136 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:23:32,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:23:32,145 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 46 statements into 1 equivalence classes. [2025-03-17 14:23:32,151 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 46 of 46 statements. [2025-03-17 14:23:32,151 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:23:32,151 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:32,304 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2025-03-17 14:23:32,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:23:32,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235418507] [2025-03-17 14:23:32,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235418507] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:23:32,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134362738] [2025-03-17 14:23:32,304 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:23:32,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:23:32,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:23:32,316 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) [2025-03-17 14:23:32,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-03-17 14:23:32,403 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 46 statements into 1 equivalence classes. [2025-03-17 14:23:32,437 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 46 of 46 statements. [2025-03-17 14:23:32,438 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:23:32,438 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:32,439 INFO L256 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 40 conjuncts are in the unsatisfiable core [2025-03-17 14:23:32,441 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:23:32,446 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 [2025-03-17 14:23:32,537 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2025-03-17 14:23:32,537 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 [2025-03-17 14:23:32,595 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 20 proven. 8 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2025-03-17 14:23:32,595 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:23:32,678 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2025-03-17 14:23:32,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134362738] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:23:32,678 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:23:32,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 11, 5] total 18 [2025-03-17 14:23:32,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57392001] [2025-03-17 14:23:32,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:23:32,679 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-17 14:23:32,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:23:32,679 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-17 14:23:32,679 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2025-03-17 14:23:33,186 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 60 [2025-03-17 14:23:33,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 90 transitions, 687 flow. Second operand has 19 states, 19 states have (on average 30.526315789473685) internal successors, (580), 19 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:33,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:23:33,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 60 [2025-03-17 14:23:33,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:23:35,337 INFO L124 PetriNetUnfolderBase]: 11126/20750 cut-off events. [2025-03-17 14:23:35,338 INFO L125 PetriNetUnfolderBase]: For 72503/74389 co-relation queries the response was YES. [2025-03-17 14:23:35,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75647 conditions, 20750 events. 11126/20750 cut-off events. For 72503/74389 co-relation queries the response was YES. Maximal size of possible extension queue 647. Compared 176008 event pairs, 3459 based on Foata normal form. 1146/21622 useless extension candidates. Maximal degree in co-relation 75551. Up to 6008 conditions per place. [2025-03-17 14:23:35,478 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 136 selfloop transitions, 21 changer transitions 0/175 dead transitions. [2025-03-17 14:23:35,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 175 transitions, 1668 flow [2025-03-17 14:23:35,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-17 14:23:35,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-03-17 14:23:35,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 445 transitions. [2025-03-17 14:23:35,479 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6180555555555556 [2025-03-17 14:23:35,479 INFO L175 Difference]: Start difference. First operand has 143 places, 90 transitions, 687 flow. Second operand 12 states and 445 transitions. [2025-03-17 14:23:35,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 175 transitions, 1668 flow [2025-03-17 14:23:35,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 175 transitions, 1631 flow, removed 2 selfloop flow, removed 12 redundant places. [2025-03-17 14:23:35,587 INFO L231 Difference]: Finished difference. Result has 145 places, 91 transitions, 717 flow [2025-03-17 14:23:35,587 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=650, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=717, PETRI_PLACES=145, PETRI_TRANSITIONS=91} [2025-03-17 14:23:35,587 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 85 predicate places. [2025-03-17 14:23:35,587 INFO L471 AbstractCegarLoop]: Abstraction has has 145 places, 91 transitions, 717 flow [2025-03-17 14:23:35,588 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 30.526315789473685) internal successors, (580), 19 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:35,588 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:23:35,588 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:23:35,595 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2025-03-17 14:23:35,788 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:23:35,788 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2025-03-17 14:23:35,789 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:23:35,789 INFO L85 PathProgramCache]: Analyzing trace with hash 35268380, now seen corresponding path program 2 times [2025-03-17 14:23:35,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:23:35,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538072480] [2025-03-17 14:23:35,789 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:23:35,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:23:35,798 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 50 statements into 2 equivalence classes. [2025-03-17 14:23:35,814 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 50 of 50 statements. [2025-03-17 14:23:35,814 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:23:35,814 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:36,179 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 29 proven. 4 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2025-03-17 14:23:36,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:23:36,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538072480] [2025-03-17 14:23:36,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538072480] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:23:36,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130251391] [2025-03-17 14:23:36,179 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:23:36,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:23:36,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:23:36,181 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) [2025-03-17 14:23:36,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-03-17 14:23:36,259 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 50 statements into 2 equivalence classes. [2025-03-17 14:23:36,293 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 50 of 50 statements. [2025-03-17 14:23:36,293 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:23:36,293 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:36,294 INFO L256 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 32 conjuncts are in the unsatisfiable core [2025-03-17 14:23:36,296 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:23:36,298 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-03-17 14:23:36,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-17 14:23:36,386 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 16 treesize of output 11 [2025-03-17 14:23:36,400 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2025-03-17 14:23:36,400 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 19 treesize of output 16 [2025-03-17 14:23:36,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-17 14:23:36,442 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 16 treesize of output 11 [2025-03-17 14:23:36,450 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-03-17 14:23:36,450 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 [2025-03-17 14:23:36,691 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 20 proven. 31 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2025-03-17 14:23:36,691 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:23:37,025 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 162 treesize of output 156 [2025-03-17 14:23:37,531 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 20 proven. 31 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2025-03-17 14:23:37,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130251391] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:23:37,531 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:23:37,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 13] total 36 [2025-03-17 14:23:37,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264445970] [2025-03-17 14:23:37,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:23:37,532 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2025-03-17 14:23:37,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:23:37,532 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2025-03-17 14:23:37,532 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1233, Unknown=0, NotChecked=0, Total=1406 [2025-03-17 14:23:40,745 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2025-03-17 14:23:43,410 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 60 [2025-03-17 14:23:43,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 91 transitions, 717 flow. Second operand has 38 states, 38 states have (on average 20.5) internal successors, (779), 38 states have internal predecessors, (779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:43,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:23:43,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 60 [2025-03-17 14:23:43,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:23:48,770 INFO L124 PetriNetUnfolderBase]: 26096/39298 cut-off events. [2025-03-17 14:23:48,771 INFO L125 PetriNetUnfolderBase]: For 179702/185418 co-relation queries the response was YES. [2025-03-17 14:23:49,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157182 conditions, 39298 events. 26096/39298 cut-off events. For 179702/185418 co-relation queries the response was YES. Maximal size of possible extension queue 1011. Compared 277725 event pairs, 1792 based on Foata normal form. 772/37549 useless extension candidates. Maximal degree in co-relation 157083. Up to 6016 conditions per place. [2025-03-17 14:23:49,195 INFO L140 encePairwiseOnDemand]: 49/60 looper letters, 242 selfloop transitions, 24 changer transitions 0/277 dead transitions. [2025-03-17 14:23:49,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 277 transitions, 2583 flow [2025-03-17 14:23:49,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-03-17 14:23:49,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2025-03-17 14:23:49,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 542 transitions. [2025-03-17 14:23:49,197 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45166666666666666 [2025-03-17 14:23:49,197 INFO L175 Difference]: Start difference. First operand has 145 places, 91 transitions, 717 flow. Second operand 20 states and 542 transitions. [2025-03-17 14:23:49,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 277 transitions, 2583 flow [2025-03-17 14:23:49,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 277 transitions, 2449 flow, removed 8 selfloop flow, removed 14 redundant places. [2025-03-17 14:23:49,603 INFO L231 Difference]: Finished difference. Result has 150 places, 91 transitions, 702 flow [2025-03-17 14:23:49,604 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=647, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=702, PETRI_PLACES=150, PETRI_TRANSITIONS=91} [2025-03-17 14:23:49,604 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 90 predicate places. [2025-03-17 14:23:49,604 INFO L471 AbstractCegarLoop]: Abstraction has has 150 places, 91 transitions, 702 flow [2025-03-17 14:23:49,604 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 20.5) internal successors, (779), 38 states have internal predecessors, (779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:49,604 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:23:49,604 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:23:49,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2025-03-17 14:23:49,805 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:23:49,805 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2025-03-17 14:23:49,805 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:23:49,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1163385493, now seen corresponding path program 1 times [2025-03-17 14:23:49,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:23:49,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401181580] [2025-03-17 14:23:49,806 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:23:49,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:23:49,813 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 51 statements into 1 equivalence classes. [2025-03-17 14:23:49,818 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 51 of 51 statements. [2025-03-17 14:23:49,818 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:23:49,818 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:49,875 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2025-03-17 14:23:49,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:23:49,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401181580] [2025-03-17 14:23:49,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401181580] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:23:49,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:23:49,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-17 14:23:49,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658022104] [2025-03-17 14:23:49,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:23:49,876 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 14:23:49,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:23:49,876 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 14:23:49,876 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-17 14:23:49,882 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 60 [2025-03-17 14:23:49,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 91 transitions, 702 flow. Second operand has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:49,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:23:49,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 60 [2025-03-17 14:23:49,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:23:51,770 INFO L124 PetriNetUnfolderBase]: 10249/19520 cut-off events. [2025-03-17 14:23:51,770 INFO L125 PetriNetUnfolderBase]: For 76351/78080 co-relation queries the response was YES. [2025-03-17 14:23:51,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72720 conditions, 19520 events. 10249/19520 cut-off events. For 76351/78080 co-relation queries the response was YES. Maximal size of possible extension queue 616. Compared 167063 event pairs, 7245 based on Foata normal form. 25/18980 useless extension candidates. Maximal degree in co-relation 72624. Up to 12744 conditions per place. [2025-03-17 14:23:51,973 INFO L140 encePairwiseOnDemand]: 57/60 looper letters, 92 selfloop transitions, 2 changer transitions 1/114 dead transitions. [2025-03-17 14:23:51,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 114 transitions, 1051 flow [2025-03-17 14:23:51,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 14:23:51,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-17 14:23:51,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 133 transitions. [2025-03-17 14:23:51,974 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7388888888888889 [2025-03-17 14:23:51,974 INFO L175 Difference]: Start difference. First operand has 150 places, 91 transitions, 702 flow. Second operand 3 states and 133 transitions. [2025-03-17 14:23:51,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 114 transitions, 1051 flow [2025-03-17 14:23:52,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 114 transitions, 1003 flow, removed 1 selfloop flow, removed 18 redundant places. [2025-03-17 14:23:52,072 INFO L231 Difference]: Finished difference. Result has 135 places, 91 transitions, 662 flow [2025-03-17 14:23:52,072 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=654, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=662, PETRI_PLACES=135, PETRI_TRANSITIONS=91} [2025-03-17 14:23:52,073 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 75 predicate places. [2025-03-17 14:23:52,073 INFO L471 AbstractCegarLoop]: Abstraction has has 135 places, 91 transitions, 662 flow [2025-03-17 14:23:52,073 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:52,073 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:23:52,073 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:23:52,073 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2025-03-17 14:23:52,073 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2025-03-17 14:23:52,073 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:23:52,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1634001346, now seen corresponding path program 2 times [2025-03-17 14:23:52,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:23:52,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671390388] [2025-03-17 14:23:52,073 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:23:52,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:23:52,086 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 52 statements into 2 equivalence classes. [2025-03-17 14:23:52,100 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 52 of 52 statements. [2025-03-17 14:23:52,100 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:23:52,100 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:52,516 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 9 proven. 17 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2025-03-17 14:23:52,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:23:52,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671390388] [2025-03-17 14:23:52,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671390388] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:23:52,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317303879] [2025-03-17 14:23:52,517 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:23:52,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:23:52,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:23:52,519 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) [2025-03-17 14:23:52,522 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-03-17 14:23:52,667 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 52 statements into 2 equivalence classes. [2025-03-17 14:23:52,718 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 52 of 52 statements. [2025-03-17 14:23:52,718 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:23:52,718 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:23:52,724 INFO L256 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 55 conjuncts are in the unsatisfiable core [2025-03-17 14:23:52,729 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:23:52,732 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-03-17 14:23:52,769 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2025-03-17 14:23:52,769 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 [2025-03-17 14:23:52,940 INFO L349 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2025-03-17 14:23:52,941 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 3 case distinctions, treesize of input 17 treesize of output 22 [2025-03-17 14:23:53,178 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2025-03-17 14:23:53,178 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:23:53,526 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 25 proven. 26 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2025-03-17 14:23:53,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317303879] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:23:53,527 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:23:53,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 13] total 35 [2025-03-17 14:23:53,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536380670] [2025-03-17 14:23:53,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:23:53,527 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2025-03-17 14:23:53,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:23:53,528 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2025-03-17 14:23:53,528 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=315, Invalid=1017, Unknown=0, NotChecked=0, Total=1332 [2025-03-17 14:23:54,338 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 60 [2025-03-17 14:23:54,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 91 transitions, 662 flow. Second operand has 37 states, 37 states have (on average 19.7027027027027) internal successors, (729), 37 states have internal predecessors, (729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:23:54,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:23:54,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 60 [2025-03-17 14:23:54,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:24:00,160 INFO L124 PetriNetUnfolderBase]: 31764/48456 cut-off events. [2025-03-17 14:24:00,160 INFO L125 PetriNetUnfolderBase]: For 170724/174352 co-relation queries the response was YES. [2025-03-17 14:24:00,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 183929 conditions, 48456 events. 31764/48456 cut-off events. For 170724/174352 co-relation queries the response was YES. Maximal size of possible extension queue 1166. Compared 353925 event pairs, 1252 based on Foata normal form. 1044/46113 useless extension candidates. Maximal degree in co-relation 183821. Up to 7287 conditions per place. [2025-03-17 14:24:00,740 INFO L140 encePairwiseOnDemand]: 49/60 looper letters, 236 selfloop transitions, 29 changer transitions 0/276 dead transitions. [2025-03-17 14:24:00,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 276 transitions, 2490 flow [2025-03-17 14:24:00,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-03-17 14:24:00,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2025-03-17 14:24:00,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 570 transitions. [2025-03-17 14:24:00,743 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.41304347826086957 [2025-03-17 14:24:00,743 INFO L175 Difference]: Start difference. First operand has 135 places, 91 transitions, 662 flow. Second operand 23 states and 570 transitions. [2025-03-17 14:24:00,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 276 transitions, 2490 flow [2025-03-17 14:24:01,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 276 transitions, 2436 flow, removed 0 selfloop flow, removed 6 redundant places. [2025-03-17 14:24:01,080 INFO L231 Difference]: Finished difference. Result has 152 places, 94 transitions, 732 flow [2025-03-17 14:24:01,080 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=632, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=732, PETRI_PLACES=152, PETRI_TRANSITIONS=94} [2025-03-17 14:24:01,080 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 92 predicate places. [2025-03-17 14:24:01,080 INFO L471 AbstractCegarLoop]: Abstraction has has 152 places, 94 transitions, 732 flow [2025-03-17 14:24:01,081 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 19.7027027027027) internal successors, (729), 37 states have internal predecessors, (729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:24:01,081 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:24:01,081 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:24:01,087 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2025-03-17 14:24:01,281 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:24:01,281 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2025-03-17 14:24:01,282 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:24:01,282 INFO L85 PathProgramCache]: Analyzing trace with hash 885566538, now seen corresponding path program 2 times [2025-03-17 14:24:01,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:24:01,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162307369] [2025-03-17 14:24:01,282 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:24:01,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:24:01,291 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 53 statements into 2 equivalence classes. [2025-03-17 14:24:01,296 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 11 of 53 statements. [2025-03-17 14:24:01,296 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-17 14:24:01,296 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:24:01,391 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2025-03-17 14:24:01,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:24:01,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162307369] [2025-03-17 14:24:01,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162307369] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:24:01,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89722259] [2025-03-17 14:24:01,391 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:24:01,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:24:01,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:24:01,393 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) [2025-03-17 14:24:01,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-03-17 14:24:01,623 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 53 statements into 2 equivalence classes. [2025-03-17 14:24:01,638 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 11 of 53 statements. [2025-03-17 14:24:01,638 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-17 14:24:01,638 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:24:01,640 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 40 conjuncts are in the unsatisfiable core [2025-03-17 14:24:01,641 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:24:01,644 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-03-17 14:24:01,683 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2025-03-17 14:24:01,684 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 [2025-03-17 14:24:01,735 INFO L349 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2025-03-17 14:24:01,735 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 3 case distinctions, treesize of input 17 treesize of output 22 [2025-03-17 14:24:01,922 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2025-03-17 14:24:01,922 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:24:02,600 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2025-03-17 14:24:02,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89722259] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:24:02,601 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:24:02,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 16 [2025-03-17 14:24:02,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826940887] [2025-03-17 14:24:02,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:24:02,601 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-17 14:24:02,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:24:02,601 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-17 14:24:02,601 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2025-03-17 14:24:03,332 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 60 [2025-03-17 14:24:03,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 94 transitions, 732 flow. Second operand has 18 states, 18 states have (on average 29.22222222222222) internal successors, (526), 18 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:24:03,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:24:03,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 60 [2025-03-17 14:24:03,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:24:06,746 INFO L124 PetriNetUnfolderBase]: 22902/33943 cut-off events. [2025-03-17 14:24:06,747 INFO L125 PetriNetUnfolderBase]: For 117782/121965 co-relation queries the response was YES. [2025-03-17 14:24:06,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127313 conditions, 33943 events. 22902/33943 cut-off events. For 117782/121965 co-relation queries the response was YES. Maximal size of possible extension queue 900. Compared 232029 event pairs, 9220 based on Foata normal form. 756/34207 useless extension candidates. Maximal degree in co-relation 127197. Up to 15036 conditions per place. [2025-03-17 14:24:07,025 INFO L140 encePairwiseOnDemand]: 52/60 looper letters, 108 selfloop transitions, 15 changer transitions 0/136 dead transitions. [2025-03-17 14:24:07,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 136 transitions, 1278 flow [2025-03-17 14:24:07,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-17 14:24:07,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-17 14:24:07,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 240 transitions. [2025-03-17 14:24:07,026 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2025-03-17 14:24:07,026 INFO L175 Difference]: Start difference. First operand has 152 places, 94 transitions, 732 flow. Second operand 7 states and 240 transitions. [2025-03-17 14:24:07,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 136 transitions, 1278 flow [2025-03-17 14:24:07,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 136 transitions, 1211 flow, removed 5 selfloop flow, removed 22 redundant places. [2025-03-17 14:24:07,163 INFO L231 Difference]: Finished difference. Result has 136 places, 94 transitions, 701 flow [2025-03-17 14:24:07,164 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=655, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=701, PETRI_PLACES=136, PETRI_TRANSITIONS=94} [2025-03-17 14:24:07,164 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 76 predicate places. [2025-03-17 14:24:07,164 INFO L471 AbstractCegarLoop]: Abstraction has has 136 places, 94 transitions, 701 flow [2025-03-17 14:24:07,164 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 29.22222222222222) internal successors, (526), 18 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:24:07,164 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:24:07,165 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:24:07,171 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2025-03-17 14:24:07,365 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:24:07,365 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2025-03-17 14:24:07,366 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:24:07,366 INFO L85 PathProgramCache]: Analyzing trace with hash -1757211367, now seen corresponding path program 1 times [2025-03-17 14:24:07,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:24:07,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770074330] [2025-03-17 14:24:07,366 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:24:07,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:24:07,376 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 54 statements into 1 equivalence classes. [2025-03-17 14:24:07,387 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 54 of 54 statements. [2025-03-17 14:24:07,387 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:24:07,387 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:24:07,607 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2025-03-17 14:24:07,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:24:07,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770074330] [2025-03-17 14:24:07,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770074330] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:24:07,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590247783] [2025-03-17 14:24:07,607 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:24:07,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:24:07,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:24:07,614 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:24:07,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-03-17 14:24:07,783 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 54 statements into 1 equivalence classes. [2025-03-17 14:24:07,833 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 54 of 54 statements. [2025-03-17 14:24:07,833 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:24:07,833 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:24:07,835 INFO L256 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-17 14:24:07,836 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:24:07,892 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2025-03-17 14:24:07,892 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 14:24:07,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590247783] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:24:07,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-17 14:24:07,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 9 [2025-03-17 14:24:07,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161759102] [2025-03-17 14:24:07,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:24:07,894 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-17 14:24:07,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:24:07,894 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-17 14:24:07,894 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2025-03-17 14:24:07,911 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 60 [2025-03-17 14:24:07,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 94 transitions, 701 flow. Second operand has 6 states, 6 states have (on average 33.5) internal successors, (201), 6 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:24:07,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:24:07,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 60 [2025-03-17 14:24:07,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:24:10,417 INFO L124 PetriNetUnfolderBase]: 12434/23185 cut-off events. [2025-03-17 14:24:10,417 INFO L125 PetriNetUnfolderBase]: For 90238/92828 co-relation queries the response was YES. [2025-03-17 14:24:10,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81175 conditions, 23185 events. 12434/23185 cut-off events. For 90238/92828 co-relation queries the response was YES. Maximal size of possible extension queue 702. Compared 199206 event pairs, 9008 based on Foata normal form. 5/22704 useless extension candidates. Maximal degree in co-relation 81086. Up to 14846 conditions per place. [2025-03-17 14:24:10,569 INFO L140 encePairwiseOnDemand]: 55/60 looper letters, 107 selfloop transitions, 5 changer transitions 1/132 dead transitions. [2025-03-17 14:24:10,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 132 transitions, 1194 flow [2025-03-17 14:24:10,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 14:24:10,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-17 14:24:10,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 170 transitions. [2025-03-17 14:24:10,570 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7083333333333334 [2025-03-17 14:24:10,570 INFO L175 Difference]: Start difference. First operand has 136 places, 94 transitions, 701 flow. Second operand 4 states and 170 transitions. [2025-03-17 14:24:10,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 132 transitions, 1194 flow [2025-03-17 14:24:10,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 132 transitions, 1150 flow, removed 1 selfloop flow, removed 5 redundant places. [2025-03-17 14:24:10,751 INFO L231 Difference]: Finished difference. Result has 136 places, 97 transitions, 721 flow [2025-03-17 14:24:10,751 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=673, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=721, PETRI_PLACES=136, PETRI_TRANSITIONS=97} [2025-03-17 14:24:10,752 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 76 predicate places. [2025-03-17 14:24:10,752 INFO L471 AbstractCegarLoop]: Abstraction has has 136 places, 97 transitions, 721 flow [2025-03-17 14:24:10,752 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 33.5) internal successors, (201), 6 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:24:10,752 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:24:10,752 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:24:10,760 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2025-03-17 14:24:10,953 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:24:10,953 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2025-03-17 14:24:10,953 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:24:10,954 INFO L85 PathProgramCache]: Analyzing trace with hash 1973598283, now seen corresponding path program 2 times [2025-03-17 14:24:10,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:24:10,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519055349] [2025-03-17 14:24:10,954 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:24:10,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:24:10,964 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 54 statements into 2 equivalence classes. [2025-03-17 14:24:10,975 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 21 of 54 statements. [2025-03-17 14:24:10,975 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-17 14:24:10,975 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:24:11,081 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2025-03-17 14:24:11,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:24:11,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519055349] [2025-03-17 14:24:11,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519055349] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:24:11,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:24:11,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-17 14:24:11,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754450083] [2025-03-17 14:24:11,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:24:11,082 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-17 14:24:11,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:24:11,082 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-17 14:24:11,083 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2025-03-17 14:24:11,096 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 60 [2025-03-17 14:24:11,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 97 transitions, 721 flow. Second operand has 6 states, 6 states have (on average 33.5) internal successors, (201), 6 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:24:11,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:24:11,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 60 [2025-03-17 14:24:11,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:24:13,395 INFO L124 PetriNetUnfolderBase]: 12434/22695 cut-off events. [2025-03-17 14:24:13,395 INFO L125 PetriNetUnfolderBase]: For 85709/87758 co-relation queries the response was YES. [2025-03-17 14:24:13,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80812 conditions, 22695 events. 12434/22695 cut-off events. For 85709/87758 co-relation queries the response was YES. Maximal size of possible extension queue 645. Compared 189997 event pairs, 8760 based on Foata normal form. 57/21799 useless extension candidates. Maximal degree in co-relation 80722. Up to 15143 conditions per place. [2025-03-17 14:24:13,543 INFO L140 encePairwiseOnDemand]: 55/60 looper letters, 108 selfloop transitions, 7 changer transitions 1/135 dead transitions. [2025-03-17 14:24:13,543 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 135 transitions, 1213 flow [2025-03-17 14:24:13,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 14:24:13,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-17 14:24:13,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 172 transitions. [2025-03-17 14:24:13,544 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7166666666666667 [2025-03-17 14:24:13,544 INFO L175 Difference]: Start difference. First operand has 136 places, 97 transitions, 721 flow. Second operand 4 states and 172 transitions. [2025-03-17 14:24:13,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 135 transitions, 1213 flow [2025-03-17 14:24:13,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 135 transitions, 1203 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-17 14:24:13,669 INFO L231 Difference]: Finished difference. Result has 139 places, 100 transitions, 774 flow [2025-03-17 14:24:13,669 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=715, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=774, PETRI_PLACES=139, PETRI_TRANSITIONS=100} [2025-03-17 14:24:13,670 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 79 predicate places. [2025-03-17 14:24:13,670 INFO L471 AbstractCegarLoop]: Abstraction has has 139 places, 100 transitions, 774 flow [2025-03-17 14:24:13,670 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 33.5) internal successors, (201), 6 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:24:13,670 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:24:13,670 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:24:13,670 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2025-03-17 14:24:13,670 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2025-03-17 14:24:13,671 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:24:13,671 INFO L85 PathProgramCache]: Analyzing trace with hash 831688861, now seen corresponding path program 2 times [2025-03-17 14:24:13,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:24:13,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688991242] [2025-03-17 14:24:13,671 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:24:13,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:24:13,680 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 54 statements into 2 equivalence classes. [2025-03-17 14:24:13,695 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 54 of 54 statements. [2025-03-17 14:24:13,695 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:24:13,695 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:24:13,942 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 9 proven. 17 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2025-03-17 14:24:13,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:24:13,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688991242] [2025-03-17 14:24:13,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688991242] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:24:13,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647537198] [2025-03-17 14:24:13,942 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:24:13,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:24:13,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:24:13,945 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:24:13,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process