./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-queue-add-2.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/popl20-queue-add-2.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 8c3fe688d0e9a9929009fc24c8ef56c8fc1bfa15613131b287e178eb7d2f1f1e --- Real Ultimate output --- This is Ultimate 0.3.0-?-8fc3dc6-m [2025-03-17 14:31:39,145 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-17 14:31:39,196 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-03-17 14:31:39,203 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-17 14:31:39,204 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-17 14:31:39,221 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-17 14:31:39,222 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-17 14:31:39,222 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-17 14:31:39,222 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-17 14:31:39,222 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-17 14:31:39,222 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-17 14:31:39,222 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-17 14:31:39,223 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-17 14:31:39,223 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-17 14:31:39,223 INFO L153 SettingsManager]: * Use SBE=true [2025-03-17 14:31:39,223 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-17 14:31:39,223 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-17 14:31:39,223 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-17 14:31:39,223 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-17 14:31:39,223 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-17 14:31:39,223 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-03-17 14:31:39,223 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-03-17 14:31:39,223 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-03-17 14:31:39,223 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-17 14:31:39,223 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-03-17 14:31:39,223 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-03-17 14:31:39,224 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-17 14:31:39,224 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-17 14:31:39,224 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-17 14:31:39,224 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-17 14:31:39,224 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-17 14:31:39,224 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-17 14:31:39,224 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-17 14:31:39,224 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 14:31:39,225 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-17 14:31:39,225 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-17 14:31:39,225 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-17 14:31:39,225 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-17 14:31:39,225 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-17 14:31:39,225 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-17 14:31:39,225 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-17 14:31:39,225 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-17 14:31:39,225 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 -> 8c3fe688d0e9a9929009fc24c8ef56c8fc1bfa15613131b287e178eb7d2f1f1e [2025-03-17 14:31:39,448 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-17 14:31:39,458 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-17 14:31:39,460 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-17 14:31:39,461 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-17 14:31:39,461 INFO L274 PluginConnector]: CDTParser initialized [2025-03-17 14:31:39,462 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c [2025-03-17 14:31:40,536 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/422020ad3/2466d4d6d41349b0adeca401372cb2b3/FLAG647314c8d [2025-03-17 14:31:40,733 INFO L384 CDTParser]: Found 1 translation units. [2025-03-17 14:31:40,734 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c [2025-03-17 14:31:40,740 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/422020ad3/2466d4d6d41349b0adeca401372cb2b3/FLAG647314c8d [2025-03-17 14:31:41,107 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/422020ad3/2466d4d6d41349b0adeca401372cb2b3 [2025-03-17 14:31:41,112 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-17 14:31:41,114 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-17 14:31:41,115 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-17 14:31:41,116 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-17 14:31:41,119 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-17 14:31:41,119 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 02:31:41" (1/1) ... [2025-03-17 14:31:41,120 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6340505d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:31:41, skipping insertion in model container [2025-03-17 14:31:41,120 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 02:31:41" (1/1) ... [2025-03-17 14:31:41,130 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-17 14:31:41,240 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-03-17 14:31:41,242 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 14:31:41,252 INFO L200 MainTranslator]: Completed pre-run [2025-03-17 14:31:41,274 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 14:31:41,285 INFO L204 MainTranslator]: Completed translation [2025-03-17 14:31:41,286 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:31:41 WrapperNode [2025-03-17 14:31:41,286 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-17 14:31:41,287 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-17 14:31:41,287 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-17 14:31:41,287 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-17 14:31:41,291 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:31:41" (1/1) ... [2025-03-17 14:31:41,296 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:31:41" (1/1) ... [2025-03-17 14:31:41,310 INFO L138 Inliner]: procedures = 23, calls = 30, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 142 [2025-03-17 14:31:41,310 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-17 14:31:41,310 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-17 14:31:41,311 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-17 14:31:41,311 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-17 14:31:41,316 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:31:41" (1/1) ... [2025-03-17 14:31:41,316 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:31:41" (1/1) ... [2025-03-17 14:31:41,317 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:31:41" (1/1) ... [2025-03-17 14:31:41,328 INFO L175 MemorySlicer]: Split 6 memory accesses to 2 slices as follows [2, 4]. 67 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2025-03-17 14:31:41,329 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:31:41" (1/1) ... [2025-03-17 14:31:41,329 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:31:41" (1/1) ... [2025-03-17 14:31:41,333 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:31:41" (1/1) ... [2025-03-17 14:31:41,335 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:31:41" (1/1) ... [2025-03-17 14:31:41,336 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:31:41" (1/1) ... [2025-03-17 14:31:41,336 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:31:41" (1/1) ... [2025-03-17 14:31:41,337 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-17 14:31:41,338 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-17 14:31:41,338 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-17 14:31:41,338 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-17 14:31:41,339 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:31:41" (1/1) ... [2025-03-17 14:31:41,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 14:31:41,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:31:41,365 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 14:31:41,368 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 14:31:41,385 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-17 14:31:41,385 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-03-17 14:31:41,385 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-03-17 14:31:41,385 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-03-17 14:31:41,385 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-03-17 14:31:41,385 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-17 14:31:41,385 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-17 14:31:41,386 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-17 14:31:41,386 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-17 14:31:41,386 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-03-17 14:31:41,386 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-03-17 14:31:41,386 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-03-17 14:31:41,386 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-17 14:31:41,386 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-17 14:31:41,386 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-17 14:31:41,386 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-17 14:31:41,387 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 14:31:41,453 INFO L256 CfgBuilder]: Building ICFG [2025-03-17 14:31:41,454 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-17 14:31:41,673 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-17 14:31:41,673 INFO L307 CfgBuilder]: Performing block encoding [2025-03-17 14:31:41,819 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-17 14:31:41,820 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-17 14:31:41,820 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 02:31:41 BoogieIcfgContainer [2025-03-17 14:31:41,820 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-17 14:31:41,822 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-17 14:31:41,822 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-17 14:31:41,825 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-17 14:31:41,825 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 02:31:41" (1/3) ... [2025-03-17 14:31:41,826 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@196d3888 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 02:31:41, skipping insertion in model container [2025-03-17 14:31:41,826 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:31:41" (2/3) ... [2025-03-17 14:31:41,826 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@196d3888 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 02:31:41, skipping insertion in model container [2025-03-17 14:31:41,826 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 02:31:41" (3/3) ... [2025-03-17 14:31:41,827 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-queue-add-2.wvr.c [2025-03-17 14:31:41,838 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-17 14:31:41,840 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-queue-add-2.wvr.c that has 3 procedures, 36 locations, 1 initial locations, 3 loop locations, and 10 error locations. [2025-03-17 14:31:41,841 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-17 14:31:41,886 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-03-17 14:31:41,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 42 places, 39 transitions, 92 flow [2025-03-17 14:31:41,940 INFO L124 PetriNetUnfolderBase]: 4/37 cut-off events. [2025-03-17 14:31:41,942 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-03-17 14:31:41,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46 conditions, 37 events. 4/37 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 81 event pairs, 0 based on Foata normal form. 0/23 useless extension candidates. Maximal degree in co-relation 25. Up to 2 conditions per place. [2025-03-17 14:31:41,945 INFO L82 GeneralOperation]: Start removeDead. Operand has 42 places, 39 transitions, 92 flow [2025-03-17 14:31:41,948 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 39 places, 36 transitions, 84 flow [2025-03-17 14:31:41,954 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-17 14:31:41,963 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;@2694c9db, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-17 14:31:41,963 INFO L334 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2025-03-17 14:31:41,965 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-17 14:31:41,966 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2025-03-17 14:31:41,966 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-03-17 14:31:41,966 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:31:41,966 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-03-17 14:31:41,967 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-03-17 14:31:41,970 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:31:41,970 INFO L85 PathProgramCache]: Analyzing trace with hash 409273, now seen corresponding path program 1 times [2025-03-17 14:31:41,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:31:41,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934115575] [2025-03-17 14:31:41,975 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:31:41,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:31:42,028 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-03-17 14:31:42,046 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-03-17 14:31:42,046 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:31:42,046 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:31:42,135 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 14:31:42,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:31:42,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934115575] [2025-03-17 14:31:42,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934115575] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:31:42,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:31:42,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-03-17 14:31:42,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991936687] [2025-03-17 14:31:42,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:31:42,145 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-17 14:31:42,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:31:42,164 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-17 14:31:42,165 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 14:31:42,172 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 39 [2025-03-17 14:31:42,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 36 transitions, 84 flow. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 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 14:31:42,176 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:31:42,176 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 39 [2025-03-17 14:31:42,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:31:42,314 INFO L124 PetriNetUnfolderBase]: 207/401 cut-off events. [2025-03-17 14:31:42,314 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2025-03-17 14:31:42,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 772 conditions, 401 events. 207/401 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 1783 event pairs, 172 based on Foata normal form. 1/281 useless extension candidates. Maximal degree in co-relation 721. Up to 336 conditions per place. [2025-03-17 14:31:42,320 INFO L140 encePairwiseOnDemand]: 34/39 looper letters, 24 selfloop transitions, 2 changer transitions 0/32 dead transitions. [2025-03-17 14:31:42,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 32 transitions, 128 flow [2025-03-17 14:31:42,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 14:31:42,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-17 14:31:42,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 56 transitions. [2025-03-17 14:31:42,334 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.47863247863247865 [2025-03-17 14:31:42,335 INFO L175 Difference]: Start difference. First operand has 39 places, 36 transitions, 84 flow. Second operand 3 states and 56 transitions. [2025-03-17 14:31:42,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 32 transitions, 128 flow [2025-03-17 14:31:42,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 32 transitions, 120 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-03-17 14:31:42,341 INFO L231 Difference]: Finished difference. Result has 34 places, 32 transitions, 72 flow [2025-03-17 14:31:42,343 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=72, PETRI_PLACES=34, PETRI_TRANSITIONS=32} [2025-03-17 14:31:42,346 INFO L279 CegarLoopForPetriNet]: 39 programPoint places, -5 predicate places. [2025-03-17 14:31:42,346 INFO L471 AbstractCegarLoop]: Abstraction has has 34 places, 32 transitions, 72 flow [2025-03-17 14:31:42,346 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 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 14:31:42,346 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:31:42,346 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-03-17 14:31:42,346 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-17 14:31:42,346 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-03-17 14:31:42,347 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:31:42,347 INFO L85 PathProgramCache]: Analyzing trace with hash 409274, now seen corresponding path program 1 times [2025-03-17 14:31:42,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:31:42,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815316115] [2025-03-17 14:31:42,347 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:31:42,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:31:42,354 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-03-17 14:31:42,375 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-03-17 14:31:42,376 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:31:42,376 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:31:42,616 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 14:31:42,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:31:42,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815316115] [2025-03-17 14:31:42,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815316115] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:31:42,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:31:42,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-17 14:31:42,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623018920] [2025-03-17 14:31:42,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:31:42,617 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 14:31:42,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:31:42,617 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 14:31:42,617 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-17 14:31:42,620 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 39 [2025-03-17 14:31:42,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 32 transitions, 72 flow. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 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 14:31:42,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:31:42,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 39 [2025-03-17 14:31:42,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:31:42,754 INFO L124 PetriNetUnfolderBase]: 208/404 cut-off events. [2025-03-17 14:31:42,754 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2025-03-17 14:31:42,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 763 conditions, 404 events. 208/404 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 1785 event pairs, 172 based on Foata normal form. 0/283 useless extension candidates. Maximal degree in co-relation 741. Up to 341 conditions per place. [2025-03-17 14:31:42,759 INFO L140 encePairwiseOnDemand]: 34/39 looper letters, 26 selfloop transitions, 4 changer transitions 0/35 dead transitions. [2025-03-17 14:31:42,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 35 transitions, 140 flow [2025-03-17 14:31:42,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 14:31:42,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-17 14:31:42,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 67 transitions. [2025-03-17 14:31:42,761 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.42948717948717946 [2025-03-17 14:31:42,761 INFO L175 Difference]: Start difference. First operand has 34 places, 32 transitions, 72 flow. Second operand 4 states and 67 transitions. [2025-03-17 14:31:42,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 35 transitions, 140 flow [2025-03-17 14:31:42,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 35 transitions, 134 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-17 14:31:42,763 INFO L231 Difference]: Finished difference. Result has 37 places, 35 transitions, 95 flow [2025-03-17 14:31:42,763 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=95, PETRI_PLACES=37, PETRI_TRANSITIONS=35} [2025-03-17 14:31:42,764 INFO L279 CegarLoopForPetriNet]: 39 programPoint places, -2 predicate places. [2025-03-17 14:31:42,764 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 35 transitions, 95 flow [2025-03-17 14:31:42,764 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 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 14:31:42,764 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:31:42,764 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2025-03-17 14:31:42,764 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-17 14:31:42,765 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-03-17 14:31:42,765 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:31:42,766 INFO L85 PathProgramCache]: Analyzing trace with hash 393325656, now seen corresponding path program 1 times [2025-03-17 14:31:42,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:31:42,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119314741] [2025-03-17 14:31:42,766 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:31:42,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:31:42,773 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-03-17 14:31:42,787 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-03-17 14:31:42,789 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:31:42,790 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:31:43,050 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 14:31:43,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:31:43,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119314741] [2025-03-17 14:31:43,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119314741] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:31:43,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084954952] [2025-03-17 14:31:43,051 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:31:43,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:31:43,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:31:43,053 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 14:31:43,055 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 14:31:43,093 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-03-17 14:31:43,102 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-03-17 14:31:43,102 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:31:43,102 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:31:43,103 INFO L256 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-17 14:31:43,106 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:31:43,150 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 10 treesize of output 9 [2025-03-17 14:31:43,318 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:31:43,318 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:31:43,418 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 14:31:43,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084954952] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:31:43,419 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:31:43,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2025-03-17 14:31:43,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844697724] [2025-03-17 14:31:43,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:31:43,420 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-17 14:31:43,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:31:43,420 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-17 14:31:43,421 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2025-03-17 14:31:43,442 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 39 [2025-03-17 14:31:43,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 35 transitions, 95 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 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 14:31:43,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:31:43,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 39 [2025-03-17 14:31:43,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:31:43,659 INFO L124 PetriNetUnfolderBase]: 208/403 cut-off events. [2025-03-17 14:31:43,659 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2025-03-17 14:31:43,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 770 conditions, 403 events. 208/403 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 1791 event pairs, 172 based on Foata normal form. 0/282 useless extension candidates. Maximal degree in co-relation 748. Up to 337 conditions per place. [2025-03-17 14:31:43,662 INFO L140 encePairwiseOnDemand]: 34/39 looper letters, 22 selfloop transitions, 7 changer transitions 0/34 dead transitions. [2025-03-17 14:31:43,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 34 transitions, 149 flow [2025-03-17 14:31:43,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-17 14:31:43,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-17 14:31:43,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 84 transitions. [2025-03-17 14:31:43,665 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.358974358974359 [2025-03-17 14:31:43,665 INFO L175 Difference]: Start difference. First operand has 37 places, 35 transitions, 95 flow. Second operand 6 states and 84 transitions. [2025-03-17 14:31:43,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 34 transitions, 149 flow [2025-03-17 14:31:43,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 34 transitions, 146 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-17 14:31:43,666 INFO L231 Difference]: Finished difference. Result has 40 places, 34 transitions, 102 flow [2025-03-17 14:31:43,666 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=102, PETRI_PLACES=40, PETRI_TRANSITIONS=34} [2025-03-17 14:31:43,667 INFO L279 CegarLoopForPetriNet]: 39 programPoint places, 1 predicate places. [2025-03-17 14:31:43,667 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 34 transitions, 102 flow [2025-03-17 14:31:43,667 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 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 14:31:43,667 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:31:43,667 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2025-03-17 14:31:43,675 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-03-17 14:31:43,872 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 14:31:43,872 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-03-17 14:31:43,873 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:31:43,873 INFO L85 PathProgramCache]: Analyzing trace with hash -689797132, now seen corresponding path program 1 times [2025-03-17 14:31:43,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:31:43,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149172511] [2025-03-17 14:31:43,873 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:31:43,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:31:43,877 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-03-17 14:31:43,882 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-03-17 14:31:43,882 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:31:43,882 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:31:43,933 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 14:31:43,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:31:43,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149172511] [2025-03-17 14:31:43,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149172511] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:31:43,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:31:43,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-17 14:31:43,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534086573] [2025-03-17 14:31:43,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:31:43,934 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 14:31:43,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:31:43,935 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 14:31:43,935 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-17 14:31:43,939 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 39 [2025-03-17 14:31:43,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 34 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:31:43,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:31:43,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 39 [2025-03-17 14:31:43,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:31:43,998 INFO L124 PetriNetUnfolderBase]: 143/285 cut-off events. [2025-03-17 14:31:43,998 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-03-17 14:31:43,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 549 conditions, 285 events. 143/285 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1109 event pairs, 113 based on Foata normal form. 0/225 useless extension candidates. Maximal degree in co-relation 523. Up to 230 conditions per place. [2025-03-17 14:31:44,001 INFO L140 encePairwiseOnDemand]: 34/39 looper letters, 23 selfloop transitions, 3 changer transitions 0/31 dead transitions. [2025-03-17 14:31:44,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 31 transitions, 148 flow [2025-03-17 14:31:44,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 14:31:44,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-17 14:31:44,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 62 transitions. [2025-03-17 14:31:44,004 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3974358974358974 [2025-03-17 14:31:44,004 INFO L175 Difference]: Start difference. First operand has 40 places, 34 transitions, 102 flow. Second operand 4 states and 62 transitions. [2025-03-17 14:31:44,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 31 transitions, 148 flow [2025-03-17 14:31:44,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 31 transitions, 118 flow, removed 3 selfloop flow, removed 7 redundant places. [2025-03-17 14:31:44,006 INFO L231 Difference]: Finished difference. Result has 33 places, 31 transitions, 72 flow [2025-03-17 14:31:44,006 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=72, PETRI_PLACES=33, PETRI_TRANSITIONS=31} [2025-03-17 14:31:44,007 INFO L279 CegarLoopForPetriNet]: 39 programPoint places, -6 predicate places. [2025-03-17 14:31:44,007 INFO L471 AbstractCegarLoop]: Abstraction has has 33 places, 31 transitions, 72 flow [2025-03-17 14:31:44,007 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:31:44,007 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:31:44,007 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2025-03-17 14:31:44,007 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-03-17 14:31:44,008 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-03-17 14:31:44,008 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:31:44,008 INFO L85 PathProgramCache]: Analyzing trace with hash -689797131, now seen corresponding path program 1 times [2025-03-17 14:31:44,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:31:44,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183596426] [2025-03-17 14:31:44,008 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:31:44,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:31:44,012 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-03-17 14:31:44,015 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-03-17 14:31:44,015 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:31:44,015 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:31:44,061 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 14:31:44,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:31:44,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183596426] [2025-03-17 14:31:44,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183596426] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:31:44,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:31:44,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-17 14:31:44,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462207832] [2025-03-17 14:31:44,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:31:44,061 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 14:31:44,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:31:44,062 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 14:31:44,062 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-17 14:31:44,066 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 39 [2025-03-17 14:31:44,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 31 transitions, 72 flow. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 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 14:31:44,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:31:44,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 39 [2025-03-17 14:31:44,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:31:44,149 INFO L124 PetriNetUnfolderBase]: 155/317 cut-off events. [2025-03-17 14:31:44,149 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-03-17 14:31:44,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 602 conditions, 317 events. 155/317 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1218 event pairs, 126 based on Foata normal form. 17/276 useless extension candidates. Maximal degree in co-relation 515. Up to 233 conditions per place. [2025-03-17 14:31:44,151 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 23 selfloop transitions, 2 changer transitions 8/38 dead transitions. [2025-03-17 14:31:44,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 38 transitions, 154 flow [2025-03-17 14:31:44,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 14:31:44,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-17 14:31:44,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 79 transitions. [2025-03-17 14:31:44,153 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5064102564102564 [2025-03-17 14:31:44,153 INFO L175 Difference]: Start difference. First operand has 33 places, 31 transitions, 72 flow. Second operand 4 states and 79 transitions. [2025-03-17 14:31:44,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 38 transitions, 154 flow [2025-03-17 14:31:44,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 38 transitions, 150 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-17 14:31:44,154 INFO L231 Difference]: Finished difference. Result has 35 places, 30 transitions, 81 flow [2025-03-17 14:31:44,154 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=81, PETRI_PLACES=35, PETRI_TRANSITIONS=30} [2025-03-17 14:31:44,155 INFO L279 CegarLoopForPetriNet]: 39 programPoint places, -4 predicate places. [2025-03-17 14:31:44,156 INFO L471 AbstractCegarLoop]: Abstraction has has 35 places, 30 transitions, 81 flow [2025-03-17 14:31:44,156 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 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 14:31:44,156 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:31:44,156 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:31:44,156 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-03-17 14:31:44,157 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-03-17 14:31:44,157 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:31:44,157 INFO L85 PathProgramCache]: Analyzing trace with hash 896257431, now seen corresponding path program 1 times [2025-03-17 14:31:44,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:31:44,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950425317] [2025-03-17 14:31:44,157 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:31:44,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:31:44,162 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-03-17 14:31:44,168 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-03-17 14:31:44,168 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:31:44,168 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:31:44,313 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 14:31:44,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:31:44,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950425317] [2025-03-17 14:31:44,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950425317] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:31:44,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:31:44,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-17 14:31:44,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923918566] [2025-03-17 14:31:44,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:31:44,313 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 14:31:44,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:31:44,314 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 14:31:44,314 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-17 14:31:44,322 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 39 [2025-03-17 14:31:44,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 30 transitions, 81 flow. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 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 14:31:44,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:31:44,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 39 [2025-03-17 14:31:44,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:31:44,384 INFO L124 PetriNetUnfolderBase]: 89/186 cut-off events. [2025-03-17 14:31:44,384 INFO L125 PetriNetUnfolderBase]: For 24/24 co-relation queries the response was YES. [2025-03-17 14:31:44,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 381 conditions, 186 events. 89/186 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 599 event pairs, 66 based on Foata normal form. 0/171 useless extension candidates. Maximal degree in co-relation 369. Up to 143 conditions per place. [2025-03-17 14:31:44,385 INFO L140 encePairwiseOnDemand]: 34/39 looper letters, 20 selfloop transitions, 2 changer transitions 0/27 dead transitions. [2025-03-17 14:31:44,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 27 transitions, 113 flow [2025-03-17 14:31:44,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 14:31:44,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-17 14:31:44,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 63 transitions. [2025-03-17 14:31:44,386 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.40384615384615385 [2025-03-17 14:31:44,386 INFO L175 Difference]: Start difference. First operand has 35 places, 30 transitions, 81 flow. Second operand 4 states and 63 transitions. [2025-03-17 14:31:44,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 27 transitions, 113 flow [2025-03-17 14:31:44,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 27 transitions, 109 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-17 14:31:44,387 INFO L231 Difference]: Finished difference. Result has 32 places, 27 transitions, 69 flow [2025-03-17 14:31:44,387 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=65, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=69, PETRI_PLACES=32, PETRI_TRANSITIONS=27} [2025-03-17 14:31:44,387 INFO L279 CegarLoopForPetriNet]: 39 programPoint places, -7 predicate places. [2025-03-17 14:31:44,387 INFO L471 AbstractCegarLoop]: Abstraction has has 32 places, 27 transitions, 69 flow [2025-03-17 14:31:44,387 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 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 14:31:44,387 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:31:44,387 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:31:44,387 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-03-17 14:31:44,387 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-03-17 14:31:44,388 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:31:44,388 INFO L85 PathProgramCache]: Analyzing trace with hash -52755893, now seen corresponding path program 1 times [2025-03-17 14:31:44,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:31:44,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116832927] [2025-03-17 14:31:44,388 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:31:44,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:31:44,392 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-03-17 14:31:44,397 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-03-17 14:31:44,397 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:31:44,397 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:31:44,527 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 14:31:44,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:31:44,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116832927] [2025-03-17 14:31:44,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116832927] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:31:44,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:31:44,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-03-17 14:31:44,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807046473] [2025-03-17 14:31:44,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:31:44,528 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-17 14:31:44,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:31:44,528 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-17 14:31:44,528 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2025-03-17 14:31:44,546 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2025-03-17 14:31:44,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 27 transitions, 69 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 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 14:31:44,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:31:44,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2025-03-17 14:31:44,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:31:44,685 INFO L124 PetriNetUnfolderBase]: 229/427 cut-off events. [2025-03-17 14:31:44,686 INFO L125 PetriNetUnfolderBase]: For 65/65 co-relation queries the response was YES. [2025-03-17 14:31:44,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 948 conditions, 427 events. 229/427 cut-off events. For 65/65 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1784 event pairs, 63 based on Foata normal form. 1/427 useless extension candidates. Maximal degree in co-relation 929. Up to 155 conditions per place. [2025-03-17 14:31:44,689 INFO L140 encePairwiseOnDemand]: 30/39 looper letters, 48 selfloop transitions, 9 changer transitions 7/67 dead transitions. [2025-03-17 14:31:44,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 67 transitions, 304 flow [2025-03-17 14:31:44,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-17 14:31:44,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-03-17 14:31:44,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2025-03-17 14:31:44,690 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.40705128205128205 [2025-03-17 14:31:44,690 INFO L175 Difference]: Start difference. First operand has 32 places, 27 transitions, 69 flow. Second operand 8 states and 127 transitions. [2025-03-17 14:31:44,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 67 transitions, 304 flow [2025-03-17 14:31:44,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 67 transitions, 301 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-17 14:31:44,693 INFO L231 Difference]: Finished difference. Result has 41 places, 34 transitions, 124 flow [2025-03-17 14:31:44,693 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=124, PETRI_PLACES=41, PETRI_TRANSITIONS=34} [2025-03-17 14:31:44,694 INFO L279 CegarLoopForPetriNet]: 39 programPoint places, 2 predicate places. [2025-03-17 14:31:44,695 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 34 transitions, 124 flow [2025-03-17 14:31:44,695 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 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 14:31:44,695 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:31:44,695 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:31:44,695 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2025-03-17 14:31:44,695 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-03-17 14:31:44,695 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:31:44,696 INFO L85 PathProgramCache]: Analyzing trace with hash 700131919, now seen corresponding path program 2 times [2025-03-17 14:31:44,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:31:44,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395971134] [2025-03-17 14:31:44,698 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:31:44,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:31:44,705 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-03-17 14:31:44,716 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-17 14:31:44,716 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:31:44,716 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:31:44,750 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 14:31:44,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:31:44,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395971134] [2025-03-17 14:31:44,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395971134] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:31:44,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:31:44,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-17 14:31:44,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575122397] [2025-03-17 14:31:44,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:31:44,751 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-17 14:31:44,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:31:44,752 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-17 14:31:44,752 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 14:31:44,752 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 39 [2025-03-17 14:31:44,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 34 transitions, 124 flow. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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 14:31:44,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:31:44,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 39 [2025-03-17 14:31:44,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:31:44,823 INFO L124 PetriNetUnfolderBase]: 145/309 cut-off events. [2025-03-17 14:31:44,823 INFO L125 PetriNetUnfolderBase]: For 168/168 co-relation queries the response was YES. [2025-03-17 14:31:44,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 807 conditions, 309 events. 145/309 cut-off events. For 168/168 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1173 event pairs, 39 based on Foata normal form. 6/311 useless extension candidates. Maximal degree in co-relation 795. Up to 214 conditions per place. [2025-03-17 14:31:44,824 INFO L140 encePairwiseOnDemand]: 35/39 looper letters, 28 selfloop transitions, 3 changer transitions 0/39 dead transitions. [2025-03-17 14:31:44,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 39 transitions, 199 flow [2025-03-17 14:31:44,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 14:31:44,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-17 14:31:44,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 58 transitions. [2025-03-17 14:31:44,827 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49572649572649574 [2025-03-17 14:31:44,827 INFO L175 Difference]: Start difference. First operand has 41 places, 34 transitions, 124 flow. Second operand 3 states and 58 transitions. [2025-03-17 14:31:44,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 39 transitions, 199 flow [2025-03-17 14:31:44,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 39 transitions, 189 flow, removed 2 selfloop flow, removed 3 redundant places. [2025-03-17 14:31:44,828 INFO L231 Difference]: Finished difference. Result has 40 places, 35 transitions, 133 flow [2025-03-17 14:31:44,828 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=133, PETRI_PLACES=40, PETRI_TRANSITIONS=35} [2025-03-17 14:31:44,829 INFO L279 CegarLoopForPetriNet]: 39 programPoint places, 1 predicate places. [2025-03-17 14:31:44,829 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 35 transitions, 133 flow [2025-03-17 14:31:44,829 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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 14:31:44,829 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:31:44,829 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:31:44,829 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2025-03-17 14:31:44,829 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-03-17 14:31:44,831 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:31:44,831 INFO L85 PathProgramCache]: Analyzing trace with hash -851030848, now seen corresponding path program 1 times [2025-03-17 14:31:44,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:31:44,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919614814] [2025-03-17 14:31:44,831 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:31:44,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:31:44,837 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-17 14:31:44,846 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-17 14:31:44,848 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:31:44,848 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:31:44,934 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 14:31:44,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:31:44,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919614814] [2025-03-17 14:31:44,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919614814] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:31:44,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680326807] [2025-03-17 14:31:44,935 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:31:44,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:31:44,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:31:44,937 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 14:31:44,939 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 14:31:44,973 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-17 14:31:44,988 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-17 14:31:44,988 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:31:44,988 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:31:44,989 INFO L256 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-17 14:31:44,990 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:31:45,038 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 14:31:45,038 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:31:45,102 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 14:31:45,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680326807] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:31:45,102 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:31:45,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2025-03-17 14:31:45,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338635628] [2025-03-17 14:31:45,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:31:45,103 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-17 14:31:45,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:31:45,103 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-17 14:31:45,103 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2025-03-17 14:31:45,112 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 39 [2025-03-17 14:31:45,113 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 35 transitions, 133 flow. Second operand has 12 states, 12 states have (on average 13.0) internal successors, (156), 12 states have internal predecessors, (156), 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 14:31:45,113 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:31:45,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 39 [2025-03-17 14:31:45,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:31:45,274 INFO L124 PetriNetUnfolderBase]: 238/537 cut-off events. [2025-03-17 14:31:45,274 INFO L125 PetriNetUnfolderBase]: For 476/476 co-relation queries the response was YES. [2025-03-17 14:31:45,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1473 conditions, 537 events. 238/537 cut-off events. For 476/476 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2530 event pairs, 137 based on Foata normal form. 24/552 useless extension candidates. Maximal degree in co-relation 838. Up to 248 conditions per place. [2025-03-17 14:31:45,277 INFO L140 encePairwiseOnDemand]: 33/39 looper letters, 42 selfloop transitions, 7 changer transitions 4/61 dead transitions. [2025-03-17 14:31:45,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 61 transitions, 331 flow [2025-03-17 14:31:45,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-17 14:31:45,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-17 14:31:45,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2025-03-17 14:31:45,279 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.43223443223443225 [2025-03-17 14:31:45,279 INFO L175 Difference]: Start difference. First operand has 40 places, 35 transitions, 133 flow. Second operand 7 states and 118 transitions. [2025-03-17 14:31:45,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 61 transitions, 331 flow [2025-03-17 14:31:45,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 61 transitions, 310 flow, removed 8 selfloop flow, removed 2 redundant places. [2025-03-17 14:31:45,281 INFO L231 Difference]: Finished difference. Result has 48 places, 39 transitions, 169 flow [2025-03-17 14:31:45,281 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=169, PETRI_PLACES=48, PETRI_TRANSITIONS=39} [2025-03-17 14:31:45,281 INFO L279 CegarLoopForPetriNet]: 39 programPoint places, 9 predicate places. [2025-03-17 14:31:45,282 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 39 transitions, 169 flow [2025-03-17 14:31:45,284 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 13.0) internal successors, (156), 12 states have internal predecessors, (156), 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 14:31:45,284 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:31:45,284 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:31:45,289 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-03-17 14:31:45,484 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,SelfDestructingSolverStorable8 [2025-03-17 14:31:45,484 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-03-17 14:31:45,485 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:31:45,485 INFO L85 PathProgramCache]: Analyzing trace with hash 1498792656, now seen corresponding path program 1 times [2025-03-17 14:31:45,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:31:45,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314284038] [2025-03-17 14:31:45,485 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:31:45,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:31:45,491 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-17 14:31:45,499 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-17 14:31:45,499 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:31:45,499 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:31:45,542 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 14:31:45,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:31:45,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314284038] [2025-03-17 14:31:45,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314284038] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:31:45,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:31:45,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-17 14:31:45,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121606337] [2025-03-17 14:31:45,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:31:45,543 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 14:31:45,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:31:45,544 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 14:31:45,544 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-17 14:31:45,544 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 39 [2025-03-17 14:31:45,544 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 39 transitions, 169 flow. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 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 14:31:45,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:31:45,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 39 [2025-03-17 14:31:45,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:31:45,649 INFO L124 PetriNetUnfolderBase]: 257/599 cut-off events. [2025-03-17 14:31:45,649 INFO L125 PetriNetUnfolderBase]: For 425/440 co-relation queries the response was YES. [2025-03-17 14:31:45,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1557 conditions, 599 events. 257/599 cut-off events. For 425/440 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2912 event pairs, 64 based on Foata normal form. 21/613 useless extension candidates. Maximal degree in co-relation 1311. Up to 171 conditions per place. [2025-03-17 14:31:45,652 INFO L140 encePairwiseOnDemand]: 35/39 looper letters, 47 selfloop transitions, 7 changer transitions 5/66 dead transitions. [2025-03-17 14:31:45,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 66 transitions, 373 flow [2025-03-17 14:31:45,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 14:31:45,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-17 14:31:45,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 88 transitions. [2025-03-17 14:31:45,655 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5641025641025641 [2025-03-17 14:31:45,655 INFO L175 Difference]: Start difference. First operand has 48 places, 39 transitions, 169 flow. Second operand 4 states and 88 transitions. [2025-03-17 14:31:45,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 66 transitions, 373 flow [2025-03-17 14:31:45,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 66 transitions, 358 flow, removed 6 selfloop flow, removed 2 redundant places. [2025-03-17 14:31:45,658 INFO L231 Difference]: Finished difference. Result has 51 places, 38 transitions, 180 flow [2025-03-17 14:31:45,659 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=157, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=180, PETRI_PLACES=51, PETRI_TRANSITIONS=38} [2025-03-17 14:31:45,659 INFO L279 CegarLoopForPetriNet]: 39 programPoint places, 12 predicate places. [2025-03-17 14:31:45,660 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 38 transitions, 180 flow [2025-03-17 14:31:45,660 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 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 14:31:45,660 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:31:45,660 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 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 14:31:45,660 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2025-03-17 14:31:45,661 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-03-17 14:31:45,661 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:31:45,661 INFO L85 PathProgramCache]: Analyzing trace with hash -1158441246, now seen corresponding path program 2 times [2025-03-17 14:31:45,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:31:45,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620209136] [2025-03-17 14:31:45,661 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:31:45,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:31:45,669 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 26 statements into 2 equivalence classes. [2025-03-17 14:31:45,684 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-03-17 14:31:45,685 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:31:45,685 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:31:45,991 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:31:45,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:31:45,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620209136] [2025-03-17 14:31:45,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620209136] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:31:45,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926994461] [2025-03-17 14:31:45,991 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:31:45,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:31:45,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:31:45,994 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 14:31:45,995 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 14:31:46,031 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 26 statements into 2 equivalence classes. [2025-03-17 14:31:46,052 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-03-17 14:31:46,053 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:31:46,053 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:31:46,054 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-03-17 14:31:46,055 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:31:46,227 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 14:31:46,227 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 15 [2025-03-17 14:31:46,316 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:31:46,318 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:31:46,431 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-03-17 14:31:46,432 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 11 [2025-03-17 14:31:46,638 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:31:46,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926994461] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:31:46,638 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:31:46,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 24 [2025-03-17 14:31:46,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502364384] [2025-03-17 14:31:46,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:31:46,639 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-03-17 14:31:46,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:31:46,640 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-03-17 14:31:46,641 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2025-03-17 14:31:46,730 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 39 [2025-03-17 14:31:46,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 38 transitions, 180 flow. Second operand has 25 states, 25 states have (on average 9.72) internal successors, (243), 25 states have internal predecessors, (243), 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 14:31:46,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:31:46,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 39 [2025-03-17 14:31:46,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:31:47,422 INFO L124 PetriNetUnfolderBase]: 891/1666 cut-off events. [2025-03-17 14:31:47,423 INFO L125 PetriNetUnfolderBase]: For 2081/2081 co-relation queries the response was YES. [2025-03-17 14:31:47,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4823 conditions, 1666 events. 891/1666 cut-off events. For 2081/2081 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 8748 event pairs, 148 based on Foata normal form. 104/1769 useless extension candidates. Maximal degree in co-relation 2693. Up to 390 conditions per place. [2025-03-17 14:31:47,431 INFO L140 encePairwiseOnDemand]: 31/39 looper letters, 114 selfloop transitions, 23 changer transitions 15/154 dead transitions. [2025-03-17 14:31:47,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 154 transitions, 1025 flow [2025-03-17 14:31:47,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-17 14:31:47,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2025-03-17 14:31:47,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 231 transitions. [2025-03-17 14:31:47,433 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.39487179487179486 [2025-03-17 14:31:47,433 INFO L175 Difference]: Start difference. First operand has 51 places, 38 transitions, 180 flow. Second operand 15 states and 231 transitions. [2025-03-17 14:31:47,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 154 transitions, 1025 flow [2025-03-17 14:31:47,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 154 transitions, 951 flow, removed 37 selfloop flow, removed 2 redundant places. [2025-03-17 14:31:47,439 INFO L231 Difference]: Finished difference. Result has 67 places, 58 transitions, 423 flow [2025-03-17 14:31:47,440 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=423, PETRI_PLACES=67, PETRI_TRANSITIONS=58} [2025-03-17 14:31:47,441 INFO L279 CegarLoopForPetriNet]: 39 programPoint places, 28 predicate places. [2025-03-17 14:31:47,443 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 58 transitions, 423 flow [2025-03-17 14:31:47,443 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 9.72) internal successors, (243), 25 states have internal predecessors, (243), 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 14:31:47,443 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:31:47,443 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 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 14:31:47,450 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 14:31:47,644 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:31:47,644 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-03-17 14:31:47,645 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:31:47,645 INFO L85 PathProgramCache]: Analyzing trace with hash -1615487336, now seen corresponding path program 3 times [2025-03-17 14:31:47,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:31:47,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004223364] [2025-03-17 14:31:47,645 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 14:31:47,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:31:47,652 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 26 statements into 4 equivalence classes. [2025-03-17 14:31:47,661 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 23 of 26 statements. [2025-03-17 14:31:47,661 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-17 14:31:47,661 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:31:47,733 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-17 14:31:47,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:31:47,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004223364] [2025-03-17 14:31:47,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004223364] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:31:47,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:31:47,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-17 14:31:47,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564484333] [2025-03-17 14:31:47,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:31:47,733 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-17 14:31:47,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:31:47,734 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-17 14:31:47,734 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-03-17 14:31:47,739 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 39 [2025-03-17 14:31:47,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 58 transitions, 423 flow. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 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 14:31:47,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:31:47,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 39 [2025-03-17 14:31:47,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:31:47,898 INFO L124 PetriNetUnfolderBase]: 559/1126 cut-off events. [2025-03-17 14:31:47,898 INFO L125 PetriNetUnfolderBase]: For 3175/3175 co-relation queries the response was YES. [2025-03-17 14:31:47,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3869 conditions, 1126 events. 559/1126 cut-off events. For 3175/3175 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 5734 event pairs, 72 based on Foata normal form. 60/1184 useless extension candidates. Maximal degree in co-relation 2427. Up to 375 conditions per place. [2025-03-17 14:31:47,905 INFO L140 encePairwiseOnDemand]: 34/39 looper letters, 61 selfloop transitions, 17 changer transitions 0/83 dead transitions. [2025-03-17 14:31:47,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 83 transitions, 748 flow [2025-03-17 14:31:47,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 14:31:47,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-17 14:31:47,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 84 transitions. [2025-03-17 14:31:47,906 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4307692307692308 [2025-03-17 14:31:47,906 INFO L175 Difference]: Start difference. First operand has 67 places, 58 transitions, 423 flow. Second operand 5 states and 84 transitions. [2025-03-17 14:31:47,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 83 transitions, 748 flow [2025-03-17 14:31:47,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 83 transitions, 669 flow, removed 36 selfloop flow, removed 5 redundant places. [2025-03-17 14:31:47,916 INFO L231 Difference]: Finished difference. Result has 66 places, 58 transitions, 441 flow [2025-03-17 14:31:47,916 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=368, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=441, PETRI_PLACES=66, PETRI_TRANSITIONS=58} [2025-03-17 14:31:47,917 INFO L279 CegarLoopForPetriNet]: 39 programPoint places, 27 predicate places. [2025-03-17 14:31:47,918 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 58 transitions, 441 flow [2025-03-17 14:31:47,918 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 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 14:31:47,918 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:31:47,918 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:31:47,918 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2025-03-17 14:31:47,918 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-03-17 14:31:47,919 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:31:47,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1201120181, now seen corresponding path program 1 times [2025-03-17 14:31:47,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:31:47,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345868011] [2025-03-17 14:31:47,919 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:31:47,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:31:47,924 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-03-17 14:31:47,942 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-03-17 14:31:47,945 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:31:47,945 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:31:48,475 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:31:48,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:31:48,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345868011] [2025-03-17 14:31:48,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345868011] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:31:48,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69378391] [2025-03-17 14:31:48,476 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:31:48,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:31:48,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:31:48,478 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 14:31:48,479 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 14:31:48,519 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-03-17 14:31:48,535 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-03-17 14:31:48,535 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:31:48,535 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:31:48,541 INFO L256 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 32 conjuncts are in the unsatisfiable core [2025-03-17 14:31:48,542 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:31:48,986 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:31:48,986 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:31:49,227 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 14:31:49,228 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2025-03-17 14:31:49,537 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:31:49,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69378391] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:31:49,537 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:31:49,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 41 [2025-03-17 14:31:49,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136450910] [2025-03-17 14:31:49,537 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:31:49,537 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2025-03-17 14:31:49,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:31:49,538 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2025-03-17 14:31:49,538 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=1522, Unknown=0, NotChecked=0, Total=1722 [2025-03-17 14:31:49,632 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 39 [2025-03-17 14:31:49,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 58 transitions, 441 flow. Second operand has 42 states, 42 states have (on average 7.928571428571429) internal successors, (333), 42 states have internal predecessors, (333), 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 14:31:49,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:31:49,633 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 39 [2025-03-17 14:31:49,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:31:52,390 INFO L124 PetriNetUnfolderBase]: 1331/2433 cut-off events. [2025-03-17 14:31:52,390 INFO L125 PetriNetUnfolderBase]: For 5287/5287 co-relation queries the response was YES. [2025-03-17 14:31:52,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8433 conditions, 2433 events. 1331/2433 cut-off events. For 5287/5287 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 13534 event pairs, 102 based on Foata normal form. 3/2436 useless extension candidates. Maximal degree in co-relation 4504. Up to 850 conditions per place. [2025-03-17 14:31:52,403 INFO L140 encePairwiseOnDemand]: 25/39 looper letters, 207 selfloop transitions, 87 changer transitions 54/349 dead transitions. [2025-03-17 14:31:52,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 349 transitions, 2437 flow [2025-03-17 14:31:52,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2025-03-17 14:31:52,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2025-03-17 14:31:52,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 612 transitions. [2025-03-17 14:31:52,423 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3076923076923077 [2025-03-17 14:31:52,423 INFO L175 Difference]: Start difference. First operand has 66 places, 58 transitions, 441 flow. Second operand 51 states and 612 transitions. [2025-03-17 14:31:52,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 349 transitions, 2437 flow [2025-03-17 14:31:52,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 349 transitions, 2411 flow, removed 7 selfloop flow, removed 2 redundant places. [2025-03-17 14:31:52,434 INFO L231 Difference]: Finished difference. Result has 130 places, 134 transitions, 1281 flow [2025-03-17 14:31:52,434 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=430, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=1281, PETRI_PLACES=130, PETRI_TRANSITIONS=134} [2025-03-17 14:31:52,435 INFO L279 CegarLoopForPetriNet]: 39 programPoint places, 91 predicate places. [2025-03-17 14:31:52,435 INFO L471 AbstractCegarLoop]: Abstraction has has 130 places, 134 transitions, 1281 flow [2025-03-17 14:31:52,435 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 7.928571428571429) internal successors, (333), 42 states have internal predecessors, (333), 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 14:31:52,435 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:31:52,435 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:31:52,442 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 14:31:52,635 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:31:52,636 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-03-17 14:31:52,636 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:31:52,636 INFO L85 PathProgramCache]: Analyzing trace with hash -644207129, now seen corresponding path program 2 times [2025-03-17 14:31:52,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:31:52,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751810710] [2025-03-17 14:31:52,636 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:31:52,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:31:52,641 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 29 statements into 2 equivalence classes. [2025-03-17 14:31:52,654 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 29 of 29 statements. [2025-03-17 14:31:52,654 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:31:52,654 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:31:53,339 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:31:53,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:31:53,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751810710] [2025-03-17 14:31:53,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751810710] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:31:53,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737843317] [2025-03-17 14:31:53,340 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:31:53,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:31:53,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:31:53,342 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 14:31:53,343 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 14:31:53,381 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 29 statements into 2 equivalence classes. [2025-03-17 14:31:53,399 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 29 of 29 statements. [2025-03-17 14:31:53,399 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:31:53,400 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:31:53,401 INFO L256 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 31 conjuncts are in the unsatisfiable core [2025-03-17 14:31:53,402 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:31:53,642 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2025-03-17 14:31:53,795 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:31:53,795 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:31:54,014 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 14:31:54,014 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2025-03-17 14:31:54,305 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:31:54,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737843317] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:31:54,305 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:31:54,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 40 [2025-03-17 14:31:54,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212944443] [2025-03-17 14:31:54,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:31:54,306 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2025-03-17 14:31:54,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:31:54,306 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2025-03-17 14:31:54,307 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1479, Unknown=0, NotChecked=0, Total=1640 [2025-03-17 14:31:54,440 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 39 [2025-03-17 14:31:54,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 134 transitions, 1281 flow. Second operand has 41 states, 41 states have (on average 7.902439024390244) internal successors, (324), 41 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:31:54,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:31:54,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 39 [2025-03-17 14:31:54,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:31:57,324 INFO L124 PetriNetUnfolderBase]: 1485/2757 cut-off events. [2025-03-17 14:31:57,324 INFO L125 PetriNetUnfolderBase]: For 10637/10637 co-relation queries the response was YES. [2025-03-17 14:31:57,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12109 conditions, 2757 events. 1485/2757 cut-off events. For 10637/10637 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 15978 event pairs, 149 based on Foata normal form. 2/2759 useless extension candidates. Maximal degree in co-relation 12046. Up to 1147 conditions per place. [2025-03-17 14:31:57,342 INFO L140 encePairwiseOnDemand]: 23/39 looper letters, 178 selfloop transitions, 119 changer transitions 64/362 dead transitions. [2025-03-17 14:31:57,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 362 transitions, 3345 flow [2025-03-17 14:31:57,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2025-03-17 14:31:57,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2025-03-17 14:31:57,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 544 transitions. [2025-03-17 14:31:57,344 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.2967812329514457 [2025-03-17 14:31:57,344 INFO L175 Difference]: Start difference. First operand has 130 places, 134 transitions, 1281 flow. Second operand 47 states and 544 transitions. [2025-03-17 14:31:57,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 362 transitions, 3345 flow [2025-03-17 14:31:57,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 362 transitions, 3157 flow, removed 79 selfloop flow, removed 9 redundant places. [2025-03-17 14:31:57,379 INFO L231 Difference]: Finished difference. Result has 178 places, 176 transitions, 1976 flow [2025-03-17 14:31:57,380 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1149, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=1976, PETRI_PLACES=178, PETRI_TRANSITIONS=176} [2025-03-17 14:31:57,380 INFO L279 CegarLoopForPetriNet]: 39 programPoint places, 139 predicate places. [2025-03-17 14:31:57,381 INFO L471 AbstractCegarLoop]: Abstraction has has 178 places, 176 transitions, 1976 flow [2025-03-17 14:31:57,381 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 7.902439024390244) internal successors, (324), 41 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:31:57,381 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:31:57,381 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:31:57,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-03-17 14:31:57,586 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2025-03-17 14:31:57,586 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-03-17 14:31:57,586 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:31:57,586 INFO L85 PathProgramCache]: Analyzing trace with hash 1608441573, now seen corresponding path program 3 times [2025-03-17 14:31:57,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:31:57,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751368296] [2025-03-17 14:31:57,587 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 14:31:57,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:31:57,591 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 29 statements into 4 equivalence classes. [2025-03-17 14:31:57,598 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 26 of 29 statements. [2025-03-17 14:31:57,598 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-17 14:31:57,598 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:31:57,763 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-17 14:31:57,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:31:57,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751368296] [2025-03-17 14:31:57,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751368296] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:31:57,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464623002] [2025-03-17 14:31:57,764 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 14:31:57,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:31:57,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:31:57,766 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 14:31:57,767 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 14:31:57,805 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 29 statements into 4 equivalence classes. [2025-03-17 14:31:57,821 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 26 of 29 statements. [2025-03-17 14:31:57,821 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-17 14:31:57,821 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:31:57,822 INFO L256 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-03-17 14:31:57,824 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:31:58,010 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-17 14:31:58,010 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:31:58,125 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 14:31:58,125 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 21 [2025-03-17 14:31:58,172 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-17 14:31:58,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464623002] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:31:58,172 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:31:58,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2025-03-17 14:31:58,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335402065] [2025-03-17 14:31:58,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:31:58,172 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-03-17 14:31:58,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:31:58,173 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-03-17 14:31:58,173 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2025-03-17 14:31:58,185 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 39 [2025-03-17 14:31:58,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 176 transitions, 1976 flow. Second operand has 28 states, 28 states have (on average 7.857142857142857) internal successors, (220), 28 states have internal predecessors, (220), 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 14:31:58,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:31:58,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 39 [2025-03-17 14:31:58,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:31:59,076 INFO L124 PetriNetUnfolderBase]: 1742/3214 cut-off events. [2025-03-17 14:31:59,077 INFO L125 PetriNetUnfolderBase]: For 20286/20286 co-relation queries the response was YES. [2025-03-17 14:31:59,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16994 conditions, 3214 events. 1742/3214 cut-off events. For 20286/20286 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 19069 event pairs, 93 based on Foata normal form. 3/3217 useless extension candidates. Maximal degree in co-relation 16911. Up to 761 conditions per place. [2025-03-17 14:31:59,098 INFO L140 encePairwiseOnDemand]: 26/39 looper letters, 192 selfloop transitions, 163 changer transitions 35/391 dead transitions. [2025-03-17 14:31:59,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 391 transitions, 4719 flow [2025-03-17 14:31:59,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2025-03-17 14:31:59,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2025-03-17 14:31:59,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 381 transitions. [2025-03-17 14:31:59,100 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.32564102564102565 [2025-03-17 14:31:59,100 INFO L175 Difference]: Start difference. First operand has 178 places, 176 transitions, 1976 flow. Second operand 30 states and 381 transitions. [2025-03-17 14:31:59,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 391 transitions, 4719 flow [2025-03-17 14:31:59,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 391 transitions, 4476 flow, removed 59 selfloop flow, removed 20 redundant places. [2025-03-17 14:31:59,159 INFO L231 Difference]: Finished difference. Result has 184 places, 237 transitions, 3004 flow [2025-03-17 14:31:59,160 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=1818, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=3004, PETRI_PLACES=184, PETRI_TRANSITIONS=237} [2025-03-17 14:31:59,161 INFO L279 CegarLoopForPetriNet]: 39 programPoint places, 145 predicate places. [2025-03-17 14:31:59,161 INFO L471 AbstractCegarLoop]: Abstraction has has 184 places, 237 transitions, 3004 flow [2025-03-17 14:31:59,161 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 7.857142857142857) internal successors, (220), 28 states have internal predecessors, (220), 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 14:31:59,161 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:31:59,161 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:31:59,167 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-03-17 14:31:59,361 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2025-03-17 14:31:59,362 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-03-17 14:31:59,362 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:31:59,362 INFO L85 PathProgramCache]: Analyzing trace with hash -1257740063, now seen corresponding path program 4 times [2025-03-17 14:31:59,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:31:59,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950649824] [2025-03-17 14:31:59,362 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 14:31:59,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:31:59,367 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 29 statements into 2 equivalence classes. [2025-03-17 14:31:59,378 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 29 of 29 statements. [2025-03-17 14:31:59,378 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 14:31:59,378 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:31:59,532 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-17 14:31:59,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:31:59,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950649824] [2025-03-17 14:31:59,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950649824] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:31:59,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886079173] [2025-03-17 14:31:59,533 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 14:31:59,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:31:59,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:31:59,534 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 14:31:59,535 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 14:31:59,572 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 29 statements into 2 equivalence classes. [2025-03-17 14:31:59,587 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 29 of 29 statements. [2025-03-17 14:31:59,587 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 14:31:59,587 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:31:59,588 INFO L256 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 34 conjuncts are in the unsatisfiable core [2025-03-17 14:31:59,589 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:31:59,741 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 14:31:59,741 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 15 [2025-03-17 14:31:59,974 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:31:59,975 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:32:00,147 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 14:32:00,147 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2025-03-17 14:32:00,333 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:32:00,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886079173] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:32:00,333 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:32:00,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14, 14] total 36 [2025-03-17 14:32:00,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116671785] [2025-03-17 14:32:00,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:32:00,333 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2025-03-17 14:32:00,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:32:00,334 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2025-03-17 14:32:00,334 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1161, Unknown=0, NotChecked=0, Total=1332 [2025-03-17 14:32:00,401 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 39 [2025-03-17 14:32:00,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 237 transitions, 3004 flow. Second operand has 37 states, 37 states have (on average 8.08108108108108) internal successors, (299), 37 states have internal predecessors, (299), 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 14:32:00,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:32:00,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 39 [2025-03-17 14:32:00,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:32:01,644 INFO L124 PetriNetUnfolderBase]: 1746/3188 cut-off events. [2025-03-17 14:32:01,644 INFO L125 PetriNetUnfolderBase]: For 23526/23526 co-relation queries the response was YES. [2025-03-17 14:32:01,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18642 conditions, 3188 events. 1746/3188 cut-off events. For 23526/23526 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 18660 event pairs, 203 based on Foata normal form. 2/3190 useless extension candidates. Maximal degree in co-relation 18564. Up to 1434 conditions per place. [2025-03-17 14:32:01,665 INFO L140 encePairwiseOnDemand]: 24/39 looper letters, 205 selfloop transitions, 140 changer transitions 44/390 dead transitions. [2025-03-17 14:32:01,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 390 transitions, 5053 flow [2025-03-17 14:32:01,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2025-03-17 14:32:01,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2025-03-17 14:32:01,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 393 transitions. [2025-03-17 14:32:01,666 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.29638009049773756 [2025-03-17 14:32:01,667 INFO L175 Difference]: Start difference. First operand has 184 places, 237 transitions, 3004 flow. Second operand 34 states and 393 transitions. [2025-03-17 14:32:01,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 390 transitions, 5053 flow [2025-03-17 14:32:01,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 390 transitions, 4845 flow, removed 83 selfloop flow, removed 10 redundant places. [2025-03-17 14:32:01,749 INFO L231 Difference]: Finished difference. Result has 212 places, 256 transitions, 3567 flow [2025-03-17 14:32:01,749 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=2850, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=3567, PETRI_PLACES=212, PETRI_TRANSITIONS=256} [2025-03-17 14:32:01,749 INFO L279 CegarLoopForPetriNet]: 39 programPoint places, 173 predicate places. [2025-03-17 14:32:01,749 INFO L471 AbstractCegarLoop]: Abstraction has has 212 places, 256 transitions, 3567 flow [2025-03-17 14:32:01,749 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 8.08108108108108) internal successors, (299), 37 states have internal predecessors, (299), 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 14:32:01,749 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:32:01,750 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:32:01,755 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-03-17 14:32:01,950 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:32:01,950 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-03-17 14:32:01,950 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:32:01,950 INFO L85 PathProgramCache]: Analyzing trace with hash -1714523475, now seen corresponding path program 5 times [2025-03-17 14:32:01,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:32:01,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857763470] [2025-03-17 14:32:01,951 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 14:32:01,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:32:01,955 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 29 statements into 4 equivalence classes. [2025-03-17 14:32:01,964 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 29 of 29 statements. [2025-03-17 14:32:01,964 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-03-17 14:32:01,964 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:02,390 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:32:02,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:32:02,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857763470] [2025-03-17 14:32:02,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857763470] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:32:02,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905462552] [2025-03-17 14:32:02,390 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 14:32:02,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:32:02,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:32:02,393 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 14:32:02,395 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 14:32:02,433 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 29 statements into 4 equivalence classes. [2025-03-17 14:32:02,452 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 29 of 29 statements. [2025-03-17 14:32:02,452 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-03-17 14:32:02,452 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:02,453 INFO L256 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-03-17 14:32:02,454 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:32:02,681 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-17 14:32:02,681 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:32:02,778 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 14:32:02,779 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2025-03-17 14:32:02,832 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-17 14:32:02,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905462552] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:32:02,832 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:32:02,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 10] total 32 [2025-03-17 14:32:02,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634384023] [2025-03-17 14:32:02,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:32:02,832 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2025-03-17 14:32:02,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:32:02,833 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2025-03-17 14:32:02,833 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=946, Unknown=0, NotChecked=0, Total=1056 [2025-03-17 14:32:02,882 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 39 [2025-03-17 14:32:02,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 256 transitions, 3567 flow. Second operand has 33 states, 33 states have (on average 8.090909090909092) internal successors, (267), 33 states have internal predecessors, (267), 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 14:32:02,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:32:02,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 39 [2025-03-17 14:32:02,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:32:03,689 INFO L124 PetriNetUnfolderBase]: 1690/3075 cut-off events. [2025-03-17 14:32:03,689 INFO L125 PetriNetUnfolderBase]: For 26679/26679 co-relation queries the response was YES. [2025-03-17 14:32:03,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19317 conditions, 3075 events. 1690/3075 cut-off events. For 26679/26679 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 17740 event pairs, 211 based on Foata normal form. 2/3077 useless extension candidates. Maximal degree in co-relation 19232. Up to 1818 conditions per place. [2025-03-17 14:32:03,706 INFO L140 encePairwiseOnDemand]: 24/39 looper letters, 187 selfloop transitions, 120 changer transitions 36/344 dead transitions. [2025-03-17 14:32:03,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 344 transitions, 4907 flow [2025-03-17 14:32:03,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-03-17 14:32:03,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2025-03-17 14:32:03,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 262 transitions. [2025-03-17 14:32:03,708 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.30536130536130535 [2025-03-17 14:32:03,708 INFO L175 Difference]: Start difference. First operand has 212 places, 256 transitions, 3567 flow. Second operand 22 states and 262 transitions. [2025-03-17 14:32:03,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 344 transitions, 4907 flow [2025-03-17 14:32:03,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 344 transitions, 4818 flow, removed 27 selfloop flow, removed 18 redundant places. [2025-03-17 14:32:03,796 INFO L231 Difference]: Finished difference. Result has 209 places, 245 transitions, 3582 flow [2025-03-17 14:32:03,796 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=3490, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=3582, PETRI_PLACES=209, PETRI_TRANSITIONS=245} [2025-03-17 14:32:03,797 INFO L279 CegarLoopForPetriNet]: 39 programPoint places, 170 predicate places. [2025-03-17 14:32:03,797 INFO L471 AbstractCegarLoop]: Abstraction has has 209 places, 245 transitions, 3582 flow [2025-03-17 14:32:03,797 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 8.090909090909092) internal successors, (267), 33 states have internal predecessors, (267), 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 14:32:03,797 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:32:03,797 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:32:03,803 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 14:32:04,002 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,SelfDestructingSolverStorable16 [2025-03-17 14:32:04,002 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-03-17 14:32:04,006 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:32:04,006 INFO L85 PathProgramCache]: Analyzing trace with hash 2102292807, now seen corresponding path program 6 times [2025-03-17 14:32:04,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:32:04,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360073525] [2025-03-17 14:32:04,006 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-17 14:32:04,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:32:04,012 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 31 statements into 5 equivalence classes. [2025-03-17 14:32:04,019 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 27 of 31 statements. [2025-03-17 14:32:04,019 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-03-17 14:32:04,019 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:04,169 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-03-17 14:32:04,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:32:04,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360073525] [2025-03-17 14:32:04,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360073525] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:32:04,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605537895] [2025-03-17 14:32:04,169 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-17 14:32:04,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:32:04,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:32:04,171 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 14:32:04,173 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 14:32:04,209 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 31 statements into 5 equivalence classes. [2025-03-17 14:32:04,226 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 27 of 31 statements. [2025-03-17 14:32:04,226 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-03-17 14:32:04,226 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:04,227 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-03-17 14:32:04,228 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:32:04,402 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-03-17 14:32:04,402 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:32:04,489 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 14:32:04,489 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2025-03-17 14:32:04,537 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-03-17 14:32:04,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605537895] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:32:04,537 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:32:04,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 24 [2025-03-17 14:32:04,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250353096] [2025-03-17 14:32:04,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:32:04,538 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-03-17 14:32:04,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:32:04,539 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-03-17 14:32:04,539 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2025-03-17 14:32:04,555 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 39 [2025-03-17 14:32:04,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 245 transitions, 3582 flow. Second operand has 25 states, 25 states have (on average 8.2) internal successors, (205), 25 states have internal predecessors, (205), 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 14:32:04,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:32:04,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 39 [2025-03-17 14:32:04,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:32:05,250 INFO L124 PetriNetUnfolderBase]: 1625/2943 cut-off events. [2025-03-17 14:32:05,250 INFO L125 PetriNetUnfolderBase]: For 28987/28987 co-relation queries the response was YES. [2025-03-17 14:32:05,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19142 conditions, 2943 events. 1625/2943 cut-off events. For 28987/28987 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 16697 event pairs, 188 based on Foata normal form. 1/2944 useless extension candidates. Maximal degree in co-relation 19063. Up to 1317 conditions per place. [2025-03-17 14:32:05,304 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 188 selfloop transitions, 120 changer transitions 16/325 dead transitions. [2025-03-17 14:32:05,304 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 325 transitions, 4861 flow [2025-03-17 14:32:05,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-03-17 14:32:05,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2025-03-17 14:32:05,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 212 transitions. [2025-03-17 14:32:05,305 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.33974358974358976 [2025-03-17 14:32:05,305 INFO L175 Difference]: Start difference. First operand has 209 places, 245 transitions, 3582 flow. Second operand 16 states and 212 transitions. [2025-03-17 14:32:05,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 325 transitions, 4861 flow [2025-03-17 14:32:05,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 325 transitions, 4684 flow, removed 25 selfloop flow, removed 17 redundant places. [2025-03-17 14:32:05,404 INFO L231 Difference]: Finished difference. Result has 204 places, 246 transitions, 3775 flow [2025-03-17 14:32:05,405 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=3432, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=3775, PETRI_PLACES=204, PETRI_TRANSITIONS=246} [2025-03-17 14:32:05,405 INFO L279 CegarLoopForPetriNet]: 39 programPoint places, 165 predicate places. [2025-03-17 14:32:05,405 INFO L471 AbstractCegarLoop]: Abstraction has has 204 places, 246 transitions, 3775 flow [2025-03-17 14:32:05,405 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 8.2) internal successors, (205), 25 states have internal predecessors, (205), 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 14:32:05,405 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:32:05,405 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:32:05,412 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 14:32:05,610 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,SelfDestructingSolverStorable17 [2025-03-17 14:32:05,610 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-03-17 14:32:05,610 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:32:05,611 INFO L85 PathProgramCache]: Analyzing trace with hash 95564543, now seen corresponding path program 7 times [2025-03-17 14:32:05,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:32:05,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19919335] [2025-03-17 14:32:05,611 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-17 14:32:05,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:32:05,618 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 31 statements into 1 equivalence classes. [2025-03-17 14:32:05,630 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 31 of 31 statements. [2025-03-17 14:32:05,631 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:32:05,631 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:06,295 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 14:32:06,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:32:06,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19919335] [2025-03-17 14:32:06,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19919335] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:32:06,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933643222] [2025-03-17 14:32:06,295 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-17 14:32:06,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:32:06,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:32:06,297 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 14:32:06,299 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 14:32:06,334 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 31 statements into 1 equivalence classes. [2025-03-17 14:32:06,352 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 31 of 31 statements. [2025-03-17 14:32:06,352 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:32:06,352 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:06,354 INFO L256 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 29 conjuncts are in the unsatisfiable core [2025-03-17 14:32:06,355 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:32:06,561 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-17 14:32:06,561 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:32:06,658 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 14:32:06,659 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2025-03-17 14:32:06,714 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-03-17 14:32:06,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933643222] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:32:06,714 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:32:06,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 10] total 33 [2025-03-17 14:32:06,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527877512] [2025-03-17 14:32:06,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:32:06,714 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2025-03-17 14:32:06,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:32:06,714 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2025-03-17 14:32:06,715 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1004, Unknown=0, NotChecked=0, Total=1122 [2025-03-17 14:32:06,773 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 39 [2025-03-17 14:32:06,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 246 transitions, 3775 flow. Second operand has 34 states, 34 states have (on average 8.117647058823529) internal successors, (276), 34 states have internal predecessors, (276), 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 14:32:06,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:32:06,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 39 [2025-03-17 14:32:06,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:32:07,977 INFO L124 PetriNetUnfolderBase]: 1637/2950 cut-off events. [2025-03-17 14:32:07,977 INFO L125 PetriNetUnfolderBase]: For 30563/30563 co-relation queries the response was YES. [2025-03-17 14:32:07,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19540 conditions, 2950 events. 1637/2950 cut-off events. For 30563/30563 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 16448 event pairs, 147 based on Foata normal form. 1/2951 useless extension candidates. Maximal degree in co-relation 19462. Up to 1256 conditions per place. [2025-03-17 14:32:07,997 INFO L140 encePairwiseOnDemand]: 24/39 looper letters, 184 selfloop transitions, 170 changer transitions 25/380 dead transitions. [2025-03-17 14:32:07,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 380 transitions, 5539 flow [2025-03-17 14:32:07,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2025-03-17 14:32:07,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2025-03-17 14:32:07,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 376 transitions. [2025-03-17 14:32:07,999 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3110008271298594 [2025-03-17 14:32:07,999 INFO L175 Difference]: Start difference. First operand has 204 places, 246 transitions, 3775 flow. Second operand 31 states and 376 transitions. [2025-03-17 14:32:07,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 380 transitions, 5539 flow [2025-03-17 14:32:08,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 380 transitions, 5456 flow, removed 6 selfloop flow, removed 10 redundant places. [2025-03-17 14:32:08,110 INFO L231 Difference]: Finished difference. Result has 226 places, 260 transitions, 4283 flow [2025-03-17 14:32:08,110 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=3716, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=4283, PETRI_PLACES=226, PETRI_TRANSITIONS=260} [2025-03-17 14:32:08,111 INFO L279 CegarLoopForPetriNet]: 39 programPoint places, 187 predicate places. [2025-03-17 14:32:08,111 INFO L471 AbstractCegarLoop]: Abstraction has has 226 places, 260 transitions, 4283 flow [2025-03-17 14:32:08,111 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 8.117647058823529) internal successors, (276), 34 states have internal predecessors, (276), 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 14:32:08,112 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:32:08,112 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:32:08,118 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 14:32:08,316 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:32:08,316 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-03-17 14:32:08,316 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:32:08,316 INFO L85 PathProgramCache]: Analyzing trace with hash 171677782, now seen corresponding path program 8 times [2025-03-17 14:32:08,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:32:08,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452428443] [2025-03-17 14:32:08,317 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:32:08,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:32:08,322 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 32 statements into 2 equivalence classes. [2025-03-17 14:32:08,328 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 32 of 32 statements. [2025-03-17 14:32:08,328 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:32:08,328 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:08,410 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 14:32:08,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:32:08,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452428443] [2025-03-17 14:32:08,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452428443] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:32:08,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360772057] [2025-03-17 14:32:08,411 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:32:08,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:32:08,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:32:08,413 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 14:32:08,415 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 14:32:08,453 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 32 statements into 2 equivalence classes. [2025-03-17 14:32:08,470 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 32 of 32 statements. [2025-03-17 14:32:08,471 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:32:08,471 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:08,472 INFO L256 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-17 14:32:08,473 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:32:08,578 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 14:32:08,578 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:32:08,678 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 14:32:08,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360772057] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:32:08,678 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:32:08,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 18 [2025-03-17 14:32:08,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262260733] [2025-03-17 14:32:08,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:32:08,679 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-17 14:32:08,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:32:08,679 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-17 14:32:08,679 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2025-03-17 14:32:08,701 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 39 [2025-03-17 14:32:08,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 260 transitions, 4283 flow. Second operand has 19 states, 19 states have (on average 12.368421052631579) internal successors, (235), 19 states have internal predecessors, (235), 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 14:32:08,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:32:08,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 39 [2025-03-17 14:32:08,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:32:09,157 INFO L124 PetriNetUnfolderBase]: 1040/2173 cut-off events. [2025-03-17 14:32:09,157 INFO L125 PetriNetUnfolderBase]: For 26644/26808 co-relation queries the response was YES. [2025-03-17 14:32:09,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15124 conditions, 2173 events. 1040/2173 cut-off events. For 26644/26808 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 13610 event pairs, 131 based on Foata normal form. 69/2194 useless extension candidates. Maximal degree in co-relation 15045. Up to 583 conditions per place. [2025-03-17 14:32:09,178 INFO L140 encePairwiseOnDemand]: 32/39 looper letters, 182 selfloop transitions, 44 changer transitions 46/337 dead transitions. [2025-03-17 14:32:09,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 337 transitions, 5421 flow [2025-03-17 14:32:09,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-17 14:32:09,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2025-03-17 14:32:09,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 225 transitions. [2025-03-17 14:32:09,180 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4437869822485207 [2025-03-17 14:32:09,180 INFO L175 Difference]: Start difference. First operand has 226 places, 260 transitions, 4283 flow. Second operand 13 states and 225 transitions. [2025-03-17 14:32:09,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 337 transitions, 5421 flow [2025-03-17 14:32:09,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 337 transitions, 5176 flow, removed 15 selfloop flow, removed 16 redundant places. [2025-03-17 14:32:09,274 INFO L231 Difference]: Finished difference. Result has 213 places, 220 transitions, 3500 flow [2025-03-17 14:32:09,274 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=4014, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3500, PETRI_PLACES=213, PETRI_TRANSITIONS=220} [2025-03-17 14:32:09,274 INFO L279 CegarLoopForPetriNet]: 39 programPoint places, 174 predicate places. [2025-03-17 14:32:09,274 INFO L471 AbstractCegarLoop]: Abstraction has has 213 places, 220 transitions, 3500 flow [2025-03-17 14:32:09,275 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 12.368421052631579) internal successors, (235), 19 states have internal predecessors, (235), 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 14:32:09,275 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:32:09,275 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:32:09,281 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 14:32:09,475 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:32:09,475 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-03-17 14:32:09,476 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:32:09,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1427440126, now seen corresponding path program 9 times [2025-03-17 14:32:09,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:32:09,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419752760] [2025-03-17 14:32:09,476 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 14:32:09,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:32:09,481 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 32 statements into 4 equivalence classes. [2025-03-17 14:32:09,491 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 31 of 32 statements. [2025-03-17 14:32:09,491 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-03-17 14:32:09,491 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:09,587 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-17 14:32:09,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:32:09,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419752760] [2025-03-17 14:32:09,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419752760] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:32:09,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813698388] [2025-03-17 14:32:09,587 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 14:32:09,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:32:09,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:32:09,589 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 14:32:09,591 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 14:32:09,630 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 32 statements into 4 equivalence classes. [2025-03-17 14:32:09,648 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 31 of 32 statements. [2025-03-17 14:32:09,649 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-03-17 14:32:09,649 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:09,649 INFO L256 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-03-17 14:32:09,650 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:32:09,681 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-17 14:32:09,681 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:32:09,714 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2025-03-17 14:32:09,714 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2025-03-17 14:32:09,729 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-17 14:32:09,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813698388] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:32:09,729 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:32:09,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 11 [2025-03-17 14:32:09,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78669766] [2025-03-17 14:32:09,729 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:32:09,729 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-17 14:32:09,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:32:09,730 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-17 14:32:09,730 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2025-03-17 14:32:09,745 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 39 [2025-03-17 14:32:09,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 220 transitions, 3500 flow. Second operand has 12 states, 12 states have (on average 10.75) internal successors, (129), 12 states have internal predecessors, (129), 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 14:32:09,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:32:09,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 39 [2025-03-17 14:32:09,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:32:10,205 INFO L124 PetriNetUnfolderBase]: 1431/2571 cut-off events. [2025-03-17 14:32:10,205 INFO L125 PetriNetUnfolderBase]: For 38172/38172 co-relation queries the response was YES. [2025-03-17 14:32:10,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19052 conditions, 2571 events. 1431/2571 cut-off events. For 38172/38172 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 13537 event pairs, 113 based on Foata normal form. 103/2670 useless extension candidates. Maximal degree in co-relation 18725. Up to 615 conditions per place. [2025-03-17 14:32:10,223 INFO L140 encePairwiseOnDemand]: 33/39 looper letters, 269 selfloop transitions, 66 changer transitions 42/395 dead transitions. [2025-03-17 14:32:10,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 395 transitions, 6758 flow [2025-03-17 14:32:10,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-17 14:32:10,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2025-03-17 14:32:10,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 225 transitions. [2025-03-17 14:32:10,223 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.41208791208791207 [2025-03-17 14:32:10,224 INFO L175 Difference]: Start difference. First operand has 213 places, 220 transitions, 3500 flow. Second operand 14 states and 225 transitions. [2025-03-17 14:32:10,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 395 transitions, 6758 flow [2025-03-17 14:32:10,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 395 transitions, 6543 flow, removed 17 selfloop flow, removed 17 redundant places. [2025-03-17 14:32:10,301 INFO L231 Difference]: Finished difference. Result has 204 places, 202 transitions, 3646 flow [2025-03-17 14:32:10,301 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=3352, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=3646, PETRI_PLACES=204, PETRI_TRANSITIONS=202} [2025-03-17 14:32:10,301 INFO L279 CegarLoopForPetriNet]: 39 programPoint places, 165 predicate places. [2025-03-17 14:32:10,301 INFO L471 AbstractCegarLoop]: Abstraction has has 204 places, 202 transitions, 3646 flow [2025-03-17 14:32:10,301 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.75) internal successors, (129), 12 states have internal predecessors, (129), 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 14:32:10,301 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:32:10,301 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:32:10,307 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-03-17 14:32:10,502 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,SelfDestructingSolverStorable20 [2025-03-17 14:32:10,502 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-03-17 14:32:10,502 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:32:10,502 INFO L85 PathProgramCache]: Analyzing trace with hash 273389334, now seen corresponding path program 10 times [2025-03-17 14:32:10,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:32:10,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262948246] [2025-03-17 14:32:10,502 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 14:32:10,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:32:10,507 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 34 statements into 2 equivalence classes. [2025-03-17 14:32:10,512 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 34 of 34 statements. [2025-03-17 14:32:10,512 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 14:32:10,512 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:10,562 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-03-17 14:32:10,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:32:10,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262948246] [2025-03-17 14:32:10,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262948246] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:32:10,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600512976] [2025-03-17 14:32:10,562 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 14:32:10,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:32:10,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:32:10,564 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 14:32:10,566 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 14:32:10,605 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 34 statements into 2 equivalence classes. [2025-03-17 14:32:10,633 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 34 of 34 statements. [2025-03-17 14:32:10,634 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 14:32:10,634 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:10,635 INFO L256 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-17 14:32:10,636 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:32:10,661 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-03-17 14:32:10,661 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:32:10,750 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-03-17 14:32:10,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600512976] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:32:10,750 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:32:10,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 6] total 9 [2025-03-17 14:32:10,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577395332] [2025-03-17 14:32:10,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:32:10,750 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-17 14:32:10,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:32:10,751 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-17 14:32:10,751 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2025-03-17 14:32:10,751 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 39 [2025-03-17 14:32:10,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 202 transitions, 3646 flow. Second operand has 10 states, 10 states have (on average 14.1) internal successors, (141), 10 states have internal predecessors, (141), 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 14:32:10,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:32:10,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 39 [2025-03-17 14:32:10,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:32:11,109 INFO L124 PetriNetUnfolderBase]: 1491/2997 cut-off events. [2025-03-17 14:32:11,109 INFO L125 PetriNetUnfolderBase]: For 42057/42430 co-relation queries the response was YES. [2025-03-17 14:32:11,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24030 conditions, 2997 events. 1491/2997 cut-off events. For 42057/42430 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 18865 event pairs, 155 based on Foata normal form. 145/3043 useless extension candidates. Maximal degree in co-relation 23972. Up to 918 conditions per place. [2025-03-17 14:32:11,135 INFO L140 encePairwiseOnDemand]: 35/39 looper letters, 177 selfloop transitions, 76 changer transitions 9/316 dead transitions. [2025-03-17 14:32:11,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 316 transitions, 6011 flow [2025-03-17 14:32:11,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 14:32:11,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-17 14:32:11,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 112 transitions. [2025-03-17 14:32:11,136 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5743589743589743 [2025-03-17 14:32:11,136 INFO L175 Difference]: Start difference. First operand has 204 places, 202 transitions, 3646 flow. Second operand 5 states and 112 transitions. [2025-03-17 14:32:11,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 316 transitions, 6011 flow [2025-03-17 14:32:11,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 316 transitions, 5169 flow, removed 165 selfloop flow, removed 23 redundant places. [2025-03-17 14:32:11,272 INFO L231 Difference]: Finished difference. Result has 162 places, 234 transitions, 4176 flow [2025-03-17 14:32:11,273 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=3049, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4176, PETRI_PLACES=162, PETRI_TRANSITIONS=234} [2025-03-17 14:32:11,273 INFO L279 CegarLoopForPetriNet]: 39 programPoint places, 123 predicate places. [2025-03-17 14:32:11,273 INFO L471 AbstractCegarLoop]: Abstraction has has 162 places, 234 transitions, 4176 flow [2025-03-17 14:32:11,273 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.1) internal successors, (141), 10 states have internal predecessors, (141), 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 14:32:11,273 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:32:11,273 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:32:11,279 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 14:32:11,473 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,SelfDestructingSolverStorable21 [2025-03-17 14:32:11,474 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-03-17 14:32:11,474 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:32:11,474 INFO L85 PathProgramCache]: Analyzing trace with hash 1163595785, now seen corresponding path program 11 times [2025-03-17 14:32:11,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:32:11,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236004558] [2025-03-17 14:32:11,474 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 14:32:11,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:32:11,479 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 37 statements into 5 equivalence classes. [2025-03-17 14:32:11,490 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) and asserted 37 of 37 statements. [2025-03-17 14:32:11,490 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2025-03-17 14:32:11,490 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:11,772 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-03-17 14:32:11,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:32:11,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236004558] [2025-03-17 14:32:11,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236004558] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:32:11,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321953181] [2025-03-17 14:32:11,773 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 14:32:11,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:32:11,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:32:11,774 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 14:32:11,776 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 14:32:11,815 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 37 statements into 5 equivalence classes. [2025-03-17 14:32:11,833 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) and asserted 37 of 37 statements. [2025-03-17 14:32:11,833 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2025-03-17 14:32:11,833 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:11,834 INFO L256 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 30 conjuncts are in the unsatisfiable core [2025-03-17 14:32:11,835 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:32:12,098 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-03-17 14:32:12,098 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:32:12,307 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 14:32:12,308 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 53 [2025-03-17 14:32:12,366 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-03-17 14:32:12,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321953181] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:32:12,366 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:32:12,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 33 [2025-03-17 14:32:12,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686879163] [2025-03-17 14:32:12,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:32:12,367 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2025-03-17 14:32:12,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:32:12,367 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2025-03-17 14:32:12,368 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1001, Unknown=0, NotChecked=0, Total=1122 [2025-03-17 14:32:12,385 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 39 [2025-03-17 14:32:12,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 234 transitions, 4176 flow. Second operand has 34 states, 34 states have (on average 8.147058823529411) internal successors, (277), 34 states have internal predecessors, (277), 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 14:32:12,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:32:12,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 39 [2025-03-17 14:32:12,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:32:13,622 INFO L124 PetriNetUnfolderBase]: 2645/4561 cut-off events. [2025-03-17 14:32:13,623 INFO L125 PetriNetUnfolderBase]: For 53333/53333 co-relation queries the response was YES. [2025-03-17 14:32:13,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32325 conditions, 4561 events. 2645/4561 cut-off events. For 53333/53333 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 25495 event pairs, 279 based on Foata normal form. 2/4563 useless extension candidates. Maximal degree in co-relation 32276. Up to 1891 conditions per place. [2025-03-17 14:32:13,655 INFO L140 encePairwiseOnDemand]: 28/39 looper letters, 191 selfloop transitions, 172 changer transitions 15/379 dead transitions. [2025-03-17 14:32:13,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 379 transitions, 6335 flow [2025-03-17 14:32:13,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-03-17 14:32:13,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2025-03-17 14:32:13,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 298 transitions. [2025-03-17 14:32:13,656 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.31837606837606836 [2025-03-17 14:32:13,657 INFO L175 Difference]: Start difference. First operand has 162 places, 234 transitions, 4176 flow. Second operand 24 states and 298 transitions. [2025-03-17 14:32:13,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 379 transitions, 6335 flow [2025-03-17 14:32:13,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 379 transitions, 5811 flow, removed 81 selfloop flow, removed 4 redundant places. [2025-03-17 14:32:13,772 INFO L231 Difference]: Finished difference. Result has 183 places, 263 transitions, 4779 flow [2025-03-17 14:32:13,772 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=3769, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=4779, PETRI_PLACES=183, PETRI_TRANSITIONS=263} [2025-03-17 14:32:13,772 INFO L279 CegarLoopForPetriNet]: 39 programPoint places, 144 predicate places. [2025-03-17 14:32:13,772 INFO L471 AbstractCegarLoop]: Abstraction has has 183 places, 263 transitions, 4779 flow [2025-03-17 14:32:13,772 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 8.147058823529411) internal successors, (277), 34 states have internal predecessors, (277), 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 14:32:13,772 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:32:13,772 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:32:13,778 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 14:32:13,973 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:32:13,973 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-03-17 14:32:13,973 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:32:13,973 INFO L85 PathProgramCache]: Analyzing trace with hash -141467569, now seen corresponding path program 12 times [2025-03-17 14:32:13,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:32:13,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972615589] [2025-03-17 14:32:13,974 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-17 14:32:13,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:32:13,978 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 37 statements into 5 equivalence classes. [2025-03-17 14:32:13,992 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) and asserted 37 of 37 statements. [2025-03-17 14:32:13,992 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2025-03-17 14:32:13,992 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:15,102 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 7 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:32:15,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:32:15,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972615589] [2025-03-17 14:32:15,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972615589] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:32:15,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512951575] [2025-03-17 14:32:15,102 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-17 14:32:15,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:32:15,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:32:15,104 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 14:32:15,105 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 14:32:15,140 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 37 statements into 5 equivalence classes. [2025-03-17 14:32:15,165 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) and asserted 37 of 37 statements. [2025-03-17 14:32:15,166 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2025-03-17 14:32:15,166 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:15,169 INFO L256 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 41 conjuncts are in the unsatisfiable core [2025-03-17 14:32:15,170 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:32:15,636 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 7 proven. 25 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-17 14:32:15,636 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:32:16,109 INFO L349 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2025-03-17 14:32:16,109 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 45 [2025-03-17 14:32:16,239 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-03-17 14:32:16,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512951575] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:32:16,239 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:32:16,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 16, 14] total 50 [2025-03-17 14:32:16,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790900279] [2025-03-17 14:32:16,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:32:16,239 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2025-03-17 14:32:16,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:32:16,240 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2025-03-17 14:32:16,240 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=2327, Unknown=0, NotChecked=0, Total=2550 [2025-03-17 14:32:16,411 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 39 [2025-03-17 14:32:16,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 263 transitions, 4779 flow. Second operand has 51 states, 51 states have (on average 7.980392156862745) internal successors, (407), 51 states have internal predecessors, (407), 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 14:32:16,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:32:16,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 39 [2025-03-17 14:32:16,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:32:23,641 INFO L124 PetriNetUnfolderBase]: 3957/6761 cut-off events. [2025-03-17 14:32:23,641 INFO L125 PetriNetUnfolderBase]: For 83063/83063 co-relation queries the response was YES. [2025-03-17 14:32:23,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49045 conditions, 6761 events. 3957/6761 cut-off events. For 83063/83063 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 41224 event pairs, 239 based on Foata normal form. 3/6764 useless extension candidates. Maximal degree in co-relation 48990. Up to 1988 conditions per place. [2025-03-17 14:32:23,685 INFO L140 encePairwiseOnDemand]: 23/39 looper letters, 355 selfloop transitions, 592 changer transitions 80/1028 dead transitions. [2025-03-17 14:32:23,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 1028 transitions, 16472 flow [2025-03-17 14:32:23,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2025-03-17 14:32:23,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2025-03-17 14:32:23,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 1304 transitions. [2025-03-17 14:32:23,688 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.28335506301608 [2025-03-17 14:32:23,688 INFO L175 Difference]: Start difference. First operand has 183 places, 263 transitions, 4779 flow. Second operand 118 states and 1304 transitions. [2025-03-17 14:32:23,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 1028 transitions, 16472 flow [2025-03-17 14:32:23,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 1028 transitions, 16332 flow, removed 34 selfloop flow, removed 8 redundant places. [2025-03-17 14:32:23,926 INFO L231 Difference]: Finished difference. Result has 313 places, 688 transitions, 13396 flow [2025-03-17 14:32:23,926 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=4661, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=210, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=118, PETRI_FLOW=13396, PETRI_PLACES=313, PETRI_TRANSITIONS=688} [2025-03-17 14:32:23,926 INFO L279 CegarLoopForPetriNet]: 39 programPoint places, 274 predicate places. [2025-03-17 14:32:23,926 INFO L471 AbstractCegarLoop]: Abstraction has has 313 places, 688 transitions, 13396 flow [2025-03-17 14:32:23,927 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 7.980392156862745) internal successors, (407), 51 states have internal predecessors, (407), 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 14:32:23,927 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:32:23,927 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:32:23,932 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2025-03-17 14:32:24,129 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:32:24,129 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-03-17 14:32:24,129 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:32:24,130 INFO L85 PathProgramCache]: Analyzing trace with hash 1357554075, now seen corresponding path program 13 times [2025-03-17 14:32:24,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:32:24,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903618386] [2025-03-17 14:32:24,130 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-17 14:32:24,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:32:24,134 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-03-17 14:32:24,140 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-03-17 14:32:24,140 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:32:24,140 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:24,976 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 14:32:24,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:32:24,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903618386] [2025-03-17 14:32:24,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903618386] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:32:24,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670280597] [2025-03-17 14:32:24,976 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-17 14:32:24,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:32:24,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:32:24,978 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 14:32:24,980 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 14:32:25,017 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-03-17 14:32:25,036 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-03-17 14:32:25,036 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:32:25,036 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:25,038 INFO L256 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 48 conjuncts are in the unsatisfiable core [2025-03-17 14:32:25,039 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:32:25,638 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 7 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 14:32:25,638 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:32:26,086 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 14:32:26,086 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 53 [2025-03-17 14:32:26,418 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 7 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 14:32:26,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670280597] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:32:26,418 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:32:26,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 56 [2025-03-17 14:32:26,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995869079] [2025-03-17 14:32:26,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:32:26,419 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2025-03-17 14:32:26,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:32:26,419 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2025-03-17 14:32:26,420 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=297, Invalid=2895, Unknown=0, NotChecked=0, Total=3192 [2025-03-17 14:32:26,586 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 39 [2025-03-17 14:32:26,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 688 transitions, 13396 flow. Second operand has 57 states, 57 states have (on average 7.842105263157895) internal successors, (447), 57 states have internal predecessors, (447), 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 14:32:26,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:32:26,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 39 [2025-03-17 14:32:26,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:33:02,120 INFO L124 PetriNetUnfolderBase]: 18689/31669 cut-off events. [2025-03-17 14:33:02,120 INFO L125 PetriNetUnfolderBase]: For 810901/810901 co-relation queries the response was YES. [2025-03-17 14:33:02,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 283561 conditions, 31669 events. 18689/31669 cut-off events. For 810901/810901 co-relation queries the response was YES. Maximal size of possible extension queue 735. Compared 238147 event pairs, 429 based on Foata normal form. 850/32519 useless extension candidates. Maximal degree in co-relation 283485. Up to 7451 conditions per place. [2025-03-17 14:33:02,408 INFO L140 encePairwiseOnDemand]: 23/39 looper letters, 1414 selfloop transitions, 2419 changer transitions 888/4722 dead transitions. [2025-03-17 14:33:02,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 652 places, 4722 transitions, 99876 flow [2025-03-17 14:33:02,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 357 states. [2025-03-17 14:33:02,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 357 states. [2025-03-17 14:33:02,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 4292 transitions. [2025-03-17 14:33:02,414 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.30826689650219063 [2025-03-17 14:33:02,414 INFO L175 Difference]: Start difference. First operand has 313 places, 688 transitions, 13396 flow. Second operand 357 states and 4292 transitions. [2025-03-17 14:33:02,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 652 places, 4722 transitions, 99876 flow