./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/parallel-misc-1.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e2fb8bed Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/parallel-misc-1.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 faddac23864cc4e42f962ac43a8d0f59593853dbb1d55e3baabe0c76b2187dd4 --- Real Ultimate output --- This is Ultimate 0.3.0-?-e2fb8be-m [2025-03-09 01:22:27,074 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-09 01:22:27,126 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-03-09 01:22:27,133 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-09 01:22:27,133 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-09 01:22:27,148 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-09 01:22:27,148 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-09 01:22:27,149 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-09 01:22:27,149 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-09 01:22:27,149 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-09 01:22:27,149 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-09 01:22:27,149 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-09 01:22:27,149 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-09 01:22:27,149 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-09 01:22:27,149 INFO L153 SettingsManager]: * Use SBE=true [2025-03-09 01:22:27,150 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-09 01:22:27,150 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-09 01:22:27,150 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-09 01:22:27,150 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-09 01:22:27,150 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-09 01:22:27,150 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-03-09 01:22:27,150 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-03-09 01:22:27,150 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-03-09 01:22:27,150 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-09 01:22:27,150 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-03-09 01:22:27,150 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-03-09 01:22:27,150 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-09 01:22:27,151 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-09 01:22:27,151 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-09 01:22:27,151 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-09 01:22:27,151 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-09 01:22:27,151 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-09 01:22:27,151 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-09 01:22:27,151 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-09 01:22:27,151 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-09 01:22:27,151 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-09 01:22:27,151 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-09 01:22:27,151 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-09 01:22:27,152 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-09 01:22:27,152 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-09 01:22:27,152 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-09 01:22:27,152 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-09 01:22:27,152 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 -> faddac23864cc4e42f962ac43a8d0f59593853dbb1d55e3baabe0c76b2187dd4 [2025-03-09 01:22:27,386 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-09 01:22:27,392 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-09 01:22:27,394 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-09 01:22:27,394 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-09 01:22:27,395 INFO L274 PluginConnector]: CDTParser initialized [2025-03-09 01:22:27,395 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/parallel-misc-1.wvr.c [2025-03-09 01:22:28,501 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83ad2ce0b/64c87c1311504550880627caa21048aa/FLAGd458e8110 [2025-03-09 01:22:28,758 INFO L384 CDTParser]: Found 1 translation units. [2025-03-09 01:22:28,760 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/parallel-misc-1.wvr.c [2025-03-09 01:22:28,769 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83ad2ce0b/64c87c1311504550880627caa21048aa/FLAGd458e8110 [2025-03-09 01:22:29,072 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83ad2ce0b/64c87c1311504550880627caa21048aa [2025-03-09 01:22:29,074 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-09 01:22:29,075 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-09 01:22:29,076 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-09 01:22:29,076 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-09 01:22:29,079 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-09 01:22:29,079 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.03 01:22:29" (1/1) ... [2025-03-09 01:22:29,080 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5207a446 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:22:29, skipping insertion in model container [2025-03-09 01:22:29,080 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.03 01:22:29" (1/1) ... [2025-03-09 01:22:29,090 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-09 01:22:29,206 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-03-09 01:22:29,210 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-09 01:22:29,218 INFO L200 MainTranslator]: Completed pre-run [2025-03-09 01:22:29,235 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-09 01:22:29,246 INFO L204 MainTranslator]: Completed translation [2025-03-09 01:22:29,246 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:22:29 WrapperNode [2025-03-09 01:22:29,246 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-09 01:22:29,247 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-09 01:22:29,247 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-09 01:22:29,247 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-09 01:22:29,251 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:22:29" (1/1) ... [2025-03-09 01:22:29,256 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:22:29" (1/1) ... [2025-03-09 01:22:29,273 INFO L138 Inliner]: procedures = 22, calls = 32, calls flagged for inlining = 18, calls inlined = 32, statements flattened = 270 [2025-03-09 01:22:29,274 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-09 01:22:29,274 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-09 01:22:29,274 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-09 01:22:29,274 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-09 01:22:29,280 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:22:29" (1/1) ... [2025-03-09 01:22:29,280 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:22:29" (1/1) ... [2025-03-09 01:22:29,282 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:22:29" (1/1) ... [2025-03-09 01:22:29,296 INFO L175 MemorySlicer]: Split 9 memory accesses to 2 slices as follows [2, 7]. 78 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]. [2025-03-09 01:22:29,297 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:22:29" (1/1) ... [2025-03-09 01:22:29,297 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:22:29" (1/1) ... [2025-03-09 01:22:29,302 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:22:29" (1/1) ... [2025-03-09 01:22:29,303 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:22:29" (1/1) ... [2025-03-09 01:22:29,304 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:22:29" (1/1) ... [2025-03-09 01:22:29,305 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:22:29" (1/1) ... [2025-03-09 01:22:29,306 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-09 01:22:29,307 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-09 01:22:29,307 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-09 01:22:29,307 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-09 01:22:29,308 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:22:29" (1/1) ... [2025-03-09 01:22:29,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-09 01:22:29,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:22:29,331 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-03-09 01:22:29,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-03-09 01:22:29,349 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-09 01:22:29,349 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-03-09 01:22:29,349 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-03-09 01:22:29,349 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-03-09 01:22:29,349 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-03-09 01:22:29,349 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-09 01:22:29,349 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-09 01:22:29,349 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-09 01:22:29,349 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-09 01:22:29,349 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-03-09 01:22:29,349 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-09 01:22:29,350 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-09 01:22:29,350 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-09 01:22:29,350 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-09 01:22:29,350 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-03-09 01:22:29,424 INFO L256 CfgBuilder]: Building ICFG [2025-03-09 01:22:29,426 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-09 01:22:29,859 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-09 01:22:29,859 INFO L307 CfgBuilder]: Performing block encoding [2025-03-09 01:22:30,133 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-09 01:22:30,133 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-09 01:22:30,133 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 09.03 01:22:30 BoogieIcfgContainer [2025-03-09 01:22:30,133 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-09 01:22:30,135 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-09 01:22:30,135 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-09 01:22:30,138 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-09 01:22:30,139 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.03 01:22:29" (1/3) ... [2025-03-09 01:22:30,140 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40aa2519 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.03 01:22:30, skipping insertion in model container [2025-03-09 01:22:30,140 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:22:29" (2/3) ... [2025-03-09 01:22:30,141 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40aa2519 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.03 01:22:30, skipping insertion in model container [2025-03-09 01:22:30,141 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 09.03 01:22:30" (3/3) ... [2025-03-09 01:22:30,142 INFO L128 eAbstractionObserver]: Analyzing ICFG parallel-misc-1.wvr.c [2025-03-09 01:22:30,154 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-09 01:22:30,155 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG parallel-misc-1.wvr.c that has 3 procedures, 45 locations, 1 initial locations, 3 loop locations, and 16 error locations. [2025-03-09 01:22:30,156 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-09 01:22:30,201 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-03-09 01:22:30,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 49 transitions, 112 flow [2025-03-09 01:22:30,252 INFO L124 PetriNetUnfolderBase]: 5/47 cut-off events. [2025-03-09 01:22:30,257 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-03-09 01:22:30,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56 conditions, 47 events. 5/47 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 113 event pairs, 0 based on Foata normal form. 0/26 useless extension candidates. Maximal degree in co-relation 35. Up to 2 conditions per place. [2025-03-09 01:22:30,262 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 49 transitions, 112 flow [2025-03-09 01:22:30,265 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 48 places, 46 transitions, 104 flow [2025-03-09 01:22:30,273 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-09 01:22:30,284 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;@2ba6949b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-09 01:22:30,285 INFO L334 AbstractCegarLoop]: Starting to check reachability of 30 error locations. [2025-03-09 01:22:30,289 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-09 01:22:30,290 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2025-03-09 01:22:30,290 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-03-09 01:22:30,290 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:22:30,290 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-03-09 01:22:30,291 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-03-09 01:22:30,295 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:22:30,296 INFO L85 PathProgramCache]: Analyzing trace with hash 830906, now seen corresponding path program 1 times [2025-03-09 01:22:30,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:22:30,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218619803] [2025-03-09 01:22:30,302 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:22:30,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:22:30,358 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-03-09 01:22:30,380 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-03-09 01:22:30,380 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:22:30,380 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:22:30,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:22:30,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:22:30,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218619803] [2025-03-09 01:22:30,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218619803] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:22:30,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:22:30,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-03-09 01:22:30,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788992195] [2025-03-09 01:22:30,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:22:30,527 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-09 01:22:30,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:22:30,543 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-09 01:22:30,544 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-09 01:22:30,565 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 49 [2025-03-09 01:22:30,567 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 46 transitions, 104 flow. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:22:30,567 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:22:30,567 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 49 [2025-03-09 01:22:30,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:22:30,683 INFO L124 PetriNetUnfolderBase]: 220/507 cut-off events. [2025-03-09 01:22:30,683 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2025-03-09 01:22:30,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 875 conditions, 507 events. 220/507 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2751 event pairs, 130 based on Foata normal form. 1/396 useless extension candidates. Maximal degree in co-relation 806. Up to 338 conditions per place. [2025-03-09 01:22:30,692 INFO L140 encePairwiseOnDemand]: 45/49 looper letters, 23 selfloop transitions, 2 changer transitions 0/43 dead transitions. [2025-03-09 01:22:30,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 43 transitions, 148 flow [2025-03-09 01:22:30,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-09 01:22:30,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-09 01:22:30,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 90 transitions. [2025-03-09 01:22:30,707 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6122448979591837 [2025-03-09 01:22:30,708 INFO L175 Difference]: Start difference. First operand has 48 places, 46 transitions, 104 flow. Second operand 3 states and 90 transitions. [2025-03-09 01:22:30,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 43 transitions, 148 flow [2025-03-09 01:22:30,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 43 transitions, 140 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-03-09 01:22:30,714 INFO L231 Difference]: Finished difference. Result has 43 places, 43 transitions, 94 flow [2025-03-09 01:22:30,716 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=94, PETRI_PLACES=43, PETRI_TRANSITIONS=43} [2025-03-09 01:22:30,718 INFO L279 CegarLoopForPetriNet]: 48 programPoint places, -5 predicate places. [2025-03-09 01:22:30,719 INFO L471 AbstractCegarLoop]: Abstraction has has 43 places, 43 transitions, 94 flow [2025-03-09 01:22:30,719 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:22:30,719 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:22:30,719 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-03-09 01:22:30,719 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-09 01:22:30,719 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-03-09 01:22:30,720 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:22:30,720 INFO L85 PathProgramCache]: Analyzing trace with hash 830907, now seen corresponding path program 1 times [2025-03-09 01:22:30,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:22:30,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633200298] [2025-03-09 01:22:30,720 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:22:30,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:22:30,726 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-03-09 01:22:30,741 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-03-09 01:22:30,741 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:22:30,741 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:22:30,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:22:30,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:22:30,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633200298] [2025-03-09 01:22:30,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633200298] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:22:30,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:22:30,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-09 01:22:30,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576109046] [2025-03-09 01:22:30,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:22:30,990 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-09 01:22:30,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:22:30,991 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-09 01:22:30,991 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-09 01:22:31,023 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 49 [2025-03-09 01:22:31,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 43 transitions, 94 flow. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:22:31,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:22:31,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 49 [2025-03-09 01:22:31,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:22:31,180 INFO L124 PetriNetUnfolderBase]: 221/510 cut-off events. [2025-03-09 01:22:31,180 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2025-03-09 01:22:31,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 868 conditions, 510 events. 221/510 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2769 event pairs, 130 based on Foata normal form. 0/398 useless extension candidates. Maximal degree in co-relation 846. Up to 343 conditions per place. [2025-03-09 01:22:31,184 INFO L140 encePairwiseOnDemand]: 44/49 looper letters, 25 selfloop transitions, 4 changer transitions 0/46 dead transitions. [2025-03-09 01:22:31,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 46 transitions, 160 flow [2025-03-09 01:22:31,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-09 01:22:31,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-09 01:22:31,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 114 transitions. [2025-03-09 01:22:31,185 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5816326530612245 [2025-03-09 01:22:31,185 INFO L175 Difference]: Start difference. First operand has 43 places, 43 transitions, 94 flow. Second operand 4 states and 114 transitions. [2025-03-09 01:22:31,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 46 transitions, 160 flow [2025-03-09 01:22:31,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 46 transitions, 154 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-09 01:22:31,189 INFO L231 Difference]: Finished difference. Result has 46 places, 46 transitions, 117 flow [2025-03-09 01:22:31,189 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=117, PETRI_PLACES=46, PETRI_TRANSITIONS=46} [2025-03-09 01:22:31,189 INFO L279 CegarLoopForPetriNet]: 48 programPoint places, -2 predicate places. [2025-03-09 01:22:31,189 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 46 transitions, 117 flow [2025-03-09 01:22:31,190 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:22:31,190 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:22:31,190 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2025-03-09 01:22:31,190 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-09 01:22:31,190 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-03-09 01:22:31,190 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:22:31,190 INFO L85 PathProgramCache]: Analyzing trace with hash 798528177, now seen corresponding path program 1 times [2025-03-09 01:22:31,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:22:31,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743223987] [2025-03-09 01:22:31,190 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:22:31,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:22:31,199 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-03-09 01:22:31,216 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-03-09 01:22:31,219 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:22:31,220 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:22:31,435 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:22:31,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:22:31,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743223987] [2025-03-09 01:22:31,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743223987] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 01:22:31,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682205435] [2025-03-09 01:22:31,436 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:22:31,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:22:31,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:22:31,439 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:22:31,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-09 01:22:31,486 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-03-09 01:22:31,496 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-03-09 01:22:31,496 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:22:31,496 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:22:31,497 INFO L256 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-03-09 01:22:31,500 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:22:31,541 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 [2025-03-09 01:22:31,697 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:22:31,698 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 01:22:31,776 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:22:31,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682205435] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 01:22:31,776 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-09 01:22:31,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2025-03-09 01:22:31,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195892811] [2025-03-09 01:22:31,776 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-09 01:22:31,777 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-09 01:22:31,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:22:31,777 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-09 01:22:31,777 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2025-03-09 01:22:31,922 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 49 [2025-03-09 01:22:31,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 46 transitions, 117 flow. Second operand has 11 states, 11 states have (on average 22.363636363636363) internal successors, (246), 11 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:22:31,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:22:31,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 49 [2025-03-09 01:22:31,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:22:32,191 INFO L124 PetriNetUnfolderBase]: 222/512 cut-off events. [2025-03-09 01:22:32,192 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2025-03-09 01:22:32,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 884 conditions, 512 events. 222/512 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2782 event pairs, 130 based on Foata normal form. 0/399 useless extension candidates. Maximal degree in co-relation 853. Up to 340 conditions per place. [2025-03-09 01:22:32,195 INFO L140 encePairwiseOnDemand]: 44/49 looper letters, 21 selfloop transitions, 10 changer transitions 0/48 dead transitions. [2025-03-09 01:22:32,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 48 transitions, 187 flow [2025-03-09 01:22:32,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-09 01:22:32,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-03-09 01:22:32,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2025-03-09 01:22:32,200 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5127551020408163 [2025-03-09 01:22:32,200 INFO L175 Difference]: Start difference. First operand has 46 places, 46 transitions, 117 flow. Second operand 8 states and 201 transitions. [2025-03-09 01:22:32,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 48 transitions, 187 flow [2025-03-09 01:22:32,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 48 transitions, 184 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-09 01:22:32,202 INFO L231 Difference]: Finished difference. Result has 51 places, 48 transitions, 142 flow [2025-03-09 01:22:32,202 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=142, PETRI_PLACES=51, PETRI_TRANSITIONS=48} [2025-03-09 01:22:32,203 INFO L279 CegarLoopForPetriNet]: 48 programPoint places, 3 predicate places. [2025-03-09 01:22:32,203 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 48 transitions, 142 flow [2025-03-09 01:22:32,204 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 22.363636363636363) internal successors, (246), 11 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:22:32,204 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:22:32,204 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2025-03-09 01:22:32,211 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-03-09 01:22:32,404 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:22:32,405 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-03-09 01:22:32,405 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:22:32,405 INFO L85 PathProgramCache]: Analyzing trace with hash -1013039877, now seen corresponding path program 1 times [2025-03-09 01:22:32,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:22:32,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751459588] [2025-03-09 01:22:32,406 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:22:32,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:22:32,411 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-03-09 01:22:32,414 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-03-09 01:22:32,414 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:22:32,415 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:22:32,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:22:32,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:22:32,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751459588] [2025-03-09 01:22:32,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751459588] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:22:32,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:22:32,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-09 01:22:32,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551368648] [2025-03-09 01:22:32,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:22:32,483 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-09 01:22:32,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:22:32,483 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-09 01:22:32,484 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-09 01:22:32,528 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 49 [2025-03-09 01:22:32,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 48 transitions, 142 flow. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:22:32,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:22:32,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 49 [2025-03-09 01:22:32,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:22:32,614 INFO L124 PetriNetUnfolderBase]: 222/443 cut-off events. [2025-03-09 01:22:32,615 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2025-03-09 01:22:32,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 823 conditions, 443 events. 222/443 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2067 event pairs, 130 based on Foata normal form. 0/399 useless extension candidates. Maximal degree in co-relation 785. Up to 339 conditions per place. [2025-03-09 01:22:32,617 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 27 selfloop transitions, 4 changer transitions 0/42 dead transitions. [2025-03-09 01:22:32,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 42 transitions, 192 flow [2025-03-09 01:22:32,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-09 01:22:32,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-09 01:22:32,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 91 transitions. [2025-03-09 01:22:32,619 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2025-03-09 01:22:32,619 INFO L175 Difference]: Start difference. First operand has 51 places, 48 transitions, 142 flow. Second operand 4 states and 91 transitions. [2025-03-09 01:22:32,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 42 transitions, 192 flow [2025-03-09 01:22:32,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 42 transitions, 150 flow, removed 6 selfloop flow, removed 7 redundant places. [2025-03-09 01:22:32,622 INFO L231 Difference]: Finished difference. Result has 41 places, 42 transitions, 96 flow [2025-03-09 01:22:32,622 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=96, PETRI_PLACES=41, PETRI_TRANSITIONS=42} [2025-03-09 01:22:32,623 INFO L279 CegarLoopForPetriNet]: 48 programPoint places, -7 predicate places. [2025-03-09 01:22:32,623 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 42 transitions, 96 flow [2025-03-09 01:22:32,623 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:22:32,624 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:22:32,624 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2025-03-09 01:22:32,624 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-03-09 01:22:32,624 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-03-09 01:22:32,625 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:22:32,625 INFO L85 PathProgramCache]: Analyzing trace with hash -1013039876, now seen corresponding path program 1 times [2025-03-09 01:22:32,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:22:32,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812666051] [2025-03-09 01:22:32,625 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:22:32,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:22:32,630 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-03-09 01:22:32,636 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-03-09 01:22:32,636 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:22:32,637 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:22:32,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:22:32,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:22:32,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812666051] [2025-03-09 01:22:32,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812666051] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:22:32,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:22:32,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-09 01:22:32,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357961787] [2025-03-09 01:22:32,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:22:32,704 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-09 01:22:32,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:22:32,705 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-09 01:22:32,705 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-09 01:22:32,717 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 49 [2025-03-09 01:22:32,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 42 transitions, 96 flow. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:22:32,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:22:32,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 49 [2025-03-09 01:22:32,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:22:32,846 INFO L124 PetriNetUnfolderBase]: 274/530 cut-off events. [2025-03-09 01:22:32,847 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2025-03-09 01:22:32,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 978 conditions, 530 events. 274/530 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2367 event pairs, 157 based on Foata normal form. 0/460 useless extension candidates. Maximal degree in co-relation 760. Up to 316 conditions per place. [2025-03-09 01:22:32,850 INFO L140 encePairwiseOnDemand]: 44/49 looper letters, 40 selfloop transitions, 4 changer transitions 0/54 dead transitions. [2025-03-09 01:22:32,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 54 transitions, 210 flow [2025-03-09 01:22:32,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-09 01:22:32,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-09 01:22:32,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 126 transitions. [2025-03-09 01:22:32,852 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2025-03-09 01:22:32,853 INFO L175 Difference]: Start difference. First operand has 41 places, 42 transitions, 96 flow. Second operand 4 states and 126 transitions. [2025-03-09 01:22:32,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 54 transitions, 210 flow [2025-03-09 01:22:32,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 54 transitions, 205 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-09 01:22:32,854 INFO L231 Difference]: Finished difference. Result has 44 places, 43 transitions, 110 flow [2025-03-09 01:22:32,854 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=91, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=110, PETRI_PLACES=44, PETRI_TRANSITIONS=43} [2025-03-09 01:22:32,854 INFO L279 CegarLoopForPetriNet]: 48 programPoint places, -4 predicate places. [2025-03-09 01:22:32,854 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 43 transitions, 110 flow [2025-03-09 01:22:32,854 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:22:32,854 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:22:32,856 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:22:32,856 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-03-09 01:22:32,856 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-03-09 01:22:32,856 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:22:32,857 INFO L85 PathProgramCache]: Analyzing trace with hash -867718074, now seen corresponding path program 1 times [2025-03-09 01:22:32,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:22:32,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152534844] [2025-03-09 01:22:32,857 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:22:32,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:22:32,863 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-03-09 01:22:32,869 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-03-09 01:22:32,870 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:22:32,870 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:22:33,003 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-09 01:22:33,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:22:33,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152534844] [2025-03-09 01:22:33,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152534844] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 01:22:33,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600254373] [2025-03-09 01:22:33,003 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:22:33,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:22:33,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:22:33,005 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:22:33,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-09 01:22:33,047 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-03-09 01:22:33,058 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-03-09 01:22:33,059 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:22:33,059 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:22:33,061 INFO L256 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-03-09 01:22:33,062 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:22:33,124 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-09 01:22:33,124 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 01:22:33,174 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2025-03-09 01:22:33,183 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-09 01:22:33,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600254373] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 01:22:33,183 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-09 01:22:33,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2025-03-09 01:22:33,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832461883] [2025-03-09 01:22:33,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-09 01:22:33,183 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-09 01:22:33,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:22:33,184 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-09 01:22:33,184 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2025-03-09 01:22:33,318 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2025-03-09 01:22:33,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 43 transitions, 110 flow. Second operand has 9 states, 9 states have (on average 20.666666666666668) internal successors, (186), 9 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:22:33,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:22:33,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2025-03-09 01:22:33,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:22:33,545 INFO L124 PetriNetUnfolderBase]: 410/762 cut-off events. [2025-03-09 01:22:33,546 INFO L125 PetriNetUnfolderBase]: For 112/138 co-relation queries the response was YES. [2025-03-09 01:22:33,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1519 conditions, 762 events. 410/762 cut-off events. For 112/138 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 3641 event pairs, 167 based on Foata normal form. 0/668 useless extension candidates. Maximal degree in co-relation 1282. Up to 266 conditions per place. [2025-03-09 01:22:33,549 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 56 selfloop transitions, 8 changer transitions 0/72 dead transitions. [2025-03-09 01:22:33,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 72 transitions, 305 flow [2025-03-09 01:22:33,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-09 01:22:33,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-09 01:22:33,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 179 transitions. [2025-03-09 01:22:33,551 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.608843537414966 [2025-03-09 01:22:33,551 INFO L175 Difference]: Start difference. First operand has 44 places, 43 transitions, 110 flow. Second operand 6 states and 179 transitions. [2025-03-09 01:22:33,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 72 transitions, 305 flow [2025-03-09 01:22:33,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 72 transitions, 302 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-09 01:22:33,553 INFO L231 Difference]: Finished difference. Result has 48 places, 43 transitions, 135 flow [2025-03-09 01:22:33,553 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=135, PETRI_PLACES=48, PETRI_TRANSITIONS=43} [2025-03-09 01:22:33,555 INFO L279 CegarLoopForPetriNet]: 48 programPoint places, 0 predicate places. [2025-03-09 01:22:33,555 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 43 transitions, 135 flow [2025-03-09 01:22:33,556 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 20.666666666666668) internal successors, (186), 9 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:22:33,556 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:22:33,556 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:22:33,562 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-09 01:22:33,756 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,SelfDestructingSolverStorable5 [2025-03-09 01:22:33,756 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-03-09 01:22:33,757 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:22:33,757 INFO L85 PathProgramCache]: Analyzing trace with hash 1397634252, now seen corresponding path program 1 times [2025-03-09 01:22:33,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:22:33,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722523635] [2025-03-09 01:22:33,757 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:22:33,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:22:33,761 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-03-09 01:22:33,764 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-03-09 01:22:33,764 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:22:33,764 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:22:33,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:22:33,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:22:33,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722523635] [2025-03-09 01:22:33,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722523635] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:22:33,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:22:33,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-09 01:22:33,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931523828] [2025-03-09 01:22:33,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:22:33,804 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-09 01:22:33,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:22:33,805 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-09 01:22:33,805 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-09 01:22:33,816 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 49 [2025-03-09 01:22:33,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 43 transitions, 135 flow. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:22:33,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:22:33,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 49 [2025-03-09 01:22:33,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:22:33,933 INFO L124 PetriNetUnfolderBase]: 418/751 cut-off events. [2025-03-09 01:22:33,934 INFO L125 PetriNetUnfolderBase]: For 221/246 co-relation queries the response was YES. [2025-03-09 01:22:33,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1655 conditions, 751 events. 418/751 cut-off events. For 221/246 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 3361 event pairs, 250 based on Foata normal form. 0/638 useless extension candidates. Maximal degree in co-relation 1556. Up to 553 conditions per place. [2025-03-09 01:22:33,940 INFO L140 encePairwiseOnDemand]: 44/49 looper letters, 46 selfloop transitions, 4 changer transitions 0/58 dead transitions. [2025-03-09 01:22:33,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 58 transitions, 284 flow [2025-03-09 01:22:33,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-09 01:22:33,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-09 01:22:33,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 127 transitions. [2025-03-09 01:22:33,943 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6479591836734694 [2025-03-09 01:22:33,943 INFO L175 Difference]: Start difference. First operand has 48 places, 43 transitions, 135 flow. Second operand 4 states and 127 transitions. [2025-03-09 01:22:33,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 58 transitions, 284 flow [2025-03-09 01:22:33,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 58 transitions, 278 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-09 01:22:33,947 INFO L231 Difference]: Finished difference. Result has 51 places, 44 transitions, 148 flow [2025-03-09 01:22:33,948 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=148, PETRI_PLACES=51, PETRI_TRANSITIONS=44} [2025-03-09 01:22:33,948 INFO L279 CegarLoopForPetriNet]: 48 programPoint places, 3 predicate places. [2025-03-09 01:22:33,948 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 44 transitions, 148 flow [2025-03-09 01:22:33,948 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:22:33,950 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:22:33,950 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:22:33,950 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2025-03-09 01:22:33,950 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-03-09 01:22:33,951 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:22:33,951 INFO L85 PathProgramCache]: Analyzing trace with hash -682034794, now seen corresponding path program 1 times [2025-03-09 01:22:33,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:22:33,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194140907] [2025-03-09 01:22:33,951 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:22:33,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:22:33,956 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-09 01:22:33,965 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-09 01:22:33,966 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:22:33,966 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:22:34,065 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-09 01:22:34,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:22:34,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194140907] [2025-03-09 01:22:34,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194140907] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 01:22:34,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927786257] [2025-03-09 01:22:34,066 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:22:34,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:22:34,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:22:34,069 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:22:34,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-09 01:22:34,108 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-09 01:22:34,119 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-09 01:22:34,120 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:22:34,120 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:22:34,120 INFO L256 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-03-09 01:22:34,121 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:22:34,202 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-09 01:22:34,202 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 01:22:34,234 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2025-03-09 01:22:34,241 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-09 01:22:34,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927786257] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 01:22:34,241 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-09 01:22:34,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2025-03-09 01:22:34,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838265674] [2025-03-09 01:22:34,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-09 01:22:34,242 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-09 01:22:34,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:22:34,242 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-09 01:22:34,242 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2025-03-09 01:22:34,309 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2025-03-09 01:22:34,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 44 transitions, 148 flow. Second operand has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:22:34,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:22:34,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2025-03-09 01:22:34,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:22:34,501 INFO L124 PetriNetUnfolderBase]: 638/1070 cut-off events. [2025-03-09 01:22:34,501 INFO L125 PetriNetUnfolderBase]: For 526/592 co-relation queries the response was YES. [2025-03-09 01:22:34,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2562 conditions, 1070 events. 638/1070 cut-off events. For 526/592 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 4796 event pairs, 247 based on Foata normal form. 0/916 useless extension candidates. Maximal degree in co-relation 2454. Up to 467 conditions per place. [2025-03-09 01:22:34,508 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 62 selfloop transitions, 8 changer transitions 0/76 dead transitions. [2025-03-09 01:22:34,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 76 transitions, 393 flow [2025-03-09 01:22:34,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-09 01:22:34,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-09 01:22:34,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 178 transitions. [2025-03-09 01:22:34,509 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6054421768707483 [2025-03-09 01:22:34,509 INFO L175 Difference]: Start difference. First operand has 51 places, 44 transitions, 148 flow. Second operand 6 states and 178 transitions. [2025-03-09 01:22:34,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 76 transitions, 393 flow [2025-03-09 01:22:34,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 76 transitions, 390 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-09 01:22:34,511 INFO L231 Difference]: Finished difference. Result has 55 places, 44 transitions, 173 flow [2025-03-09 01:22:34,511 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=141, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=173, PETRI_PLACES=55, PETRI_TRANSITIONS=44} [2025-03-09 01:22:34,511 INFO L279 CegarLoopForPetriNet]: 48 programPoint places, 7 predicate places. [2025-03-09 01:22:34,511 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 44 transitions, 173 flow [2025-03-09 01:22:34,511 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:22:34,511 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:22:34,511 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:22:34,517 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-09 01:22:34,712 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:22:34,712 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-03-09 01:22:34,712 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:22:34,712 INFO L85 PathProgramCache]: Analyzing trace with hash -223172662, now seen corresponding path program 1 times [2025-03-09 01:22:34,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:22:34,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847574021] [2025-03-09 01:22:34,713 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:22:34,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:22:34,717 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-03-09 01:22:34,725 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-03-09 01:22:34,725 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:22:34,725 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:22:34,804 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-09 01:22:34,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:22:34,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847574021] [2025-03-09 01:22:34,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847574021] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 01:22:34,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631497717] [2025-03-09 01:22:34,804 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:22:34,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:22:34,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:22:34,806 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:22:34,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-09 01:22:34,847 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-03-09 01:22:34,861 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-03-09 01:22:34,861 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:22:34,861 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:22:34,862 INFO L256 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-03-09 01:22:34,863 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:22:34,939 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-09 01:22:34,939 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 01:22:34,997 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-09 01:22:34,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631497717] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 01:22:34,998 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-09 01:22:34,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 13 [2025-03-09 01:22:34,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337407439] [2025-03-09 01:22:34,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-09 01:22:34,998 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-09 01:22:34,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:22:34,998 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-09 01:22:34,998 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2025-03-09 01:22:35,133 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 49 [2025-03-09 01:22:35,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 44 transitions, 173 flow. Second operand has 14 states, 14 states have (on average 23.071428571428573) internal successors, (323), 14 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:22:35,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:22:35,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 49 [2025-03-09 01:22:35,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:22:35,506 INFO L124 PetriNetUnfolderBase]: 1085/1882 cut-off events. [2025-03-09 01:22:35,506 INFO L125 PetriNetUnfolderBase]: For 1113/1160 co-relation queries the response was YES. [2025-03-09 01:22:35,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4833 conditions, 1882 events. 1085/1882 cut-off events. For 1113/1160 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 9799 event pairs, 628 based on Foata normal form. 26/1719 useless extension candidates. Maximal degree in co-relation 3904. Up to 873 conditions per place. [2025-03-09 01:22:35,517 INFO L140 encePairwiseOnDemand]: 42/49 looper letters, 93 selfloop transitions, 10 changer transitions 0/109 dead transitions. [2025-03-09 01:22:35,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 109 transitions, 599 flow [2025-03-09 01:22:35,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-09 01:22:35,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-09 01:22:35,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 280 transitions. [2025-03-09 01:22:35,518 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6349206349206349 [2025-03-09 01:22:35,518 INFO L175 Difference]: Start difference. First operand has 55 places, 44 transitions, 173 flow. Second operand 9 states and 280 transitions. [2025-03-09 01:22:35,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 109 transitions, 599 flow [2025-03-09 01:22:35,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 109 transitions, 593 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-09 01:22:35,526 INFO L231 Difference]: Finished difference. Result has 63 places, 47 transitions, 215 flow [2025-03-09 01:22:35,527 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=167, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=215, PETRI_PLACES=63, PETRI_TRANSITIONS=47} [2025-03-09 01:22:35,527 INFO L279 CegarLoopForPetriNet]: 48 programPoint places, 15 predicate places. [2025-03-09 01:22:35,527 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 47 transitions, 215 flow [2025-03-09 01:22:35,527 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 23.071428571428573) internal successors, (323), 14 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:22:35,527 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:22:35,527 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:22:35,533 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-03-09 01:22:35,728 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:22:35,728 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-03-09 01:22:35,728 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:22:35,728 INFO L85 PathProgramCache]: Analyzing trace with hash -469901029, now seen corresponding path program 1 times [2025-03-09 01:22:35,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:22:35,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579840897] [2025-03-09 01:22:35,729 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:22:35,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:22:35,734 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-03-09 01:22:35,742 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-03-09 01:22:35,742 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:22:35,742 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:22:35,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:22:35,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:22:35,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579840897] [2025-03-09 01:22:35,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579840897] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:22:35,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:22:35,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-09 01:22:35,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628269615] [2025-03-09 01:22:35,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:22:35,807 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-09 01:22:35,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:22:35,807 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-09 01:22:35,807 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-09 01:22:35,808 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 49 [2025-03-09 01:22:35,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 47 transitions, 215 flow. Second operand has 5 states, 5 states have (on average 24.2) internal successors, (121), 5 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:22:35,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:22:35,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 49 [2025-03-09 01:22:35,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:22:36,062 INFO L124 PetriNetUnfolderBase]: 1410/2415 cut-off events. [2025-03-09 01:22:36,063 INFO L125 PetriNetUnfolderBase]: For 2129/2272 co-relation queries the response was YES. [2025-03-09 01:22:36,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6570 conditions, 2415 events. 1410/2415 cut-off events. For 2129/2272 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 13271 event pairs, 169 based on Foata normal form. 3/2144 useless extension candidates. Maximal degree in co-relation 5474. Up to 1227 conditions per place. [2025-03-09 01:22:36,076 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 76 selfloop transitions, 17 changer transitions 4/104 dead transitions. [2025-03-09 01:22:36,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 104 transitions, 642 flow [2025-03-09 01:22:36,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-09 01:22:36,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-09 01:22:36,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 183 transitions. [2025-03-09 01:22:36,078 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.746938775510204 [2025-03-09 01:22:36,078 INFO L175 Difference]: Start difference. First operand has 63 places, 47 transitions, 215 flow. Second operand 5 states and 183 transitions. [2025-03-09 01:22:36,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 104 transitions, 642 flow [2025-03-09 01:22:36,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 104 transitions, 634 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-09 01:22:36,087 INFO L231 Difference]: Finished difference. Result has 67 places, 59 transitions, 337 flow [2025-03-09 01:22:36,087 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=207, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=337, PETRI_PLACES=67, PETRI_TRANSITIONS=59} [2025-03-09 01:22:36,089 INFO L279 CegarLoopForPetriNet]: 48 programPoint places, 19 predicate places. [2025-03-09 01:22:36,089 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 59 transitions, 337 flow [2025-03-09 01:22:36,089 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.2) internal successors, (121), 5 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:22:36,089 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:22:36,089 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:22:36,089 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2025-03-09 01:22:36,089 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-03-09 01:22:36,090 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:22:36,091 INFO L85 PathProgramCache]: Analyzing trace with hash 863326528, now seen corresponding path program 2 times [2025-03-09 01:22:36,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:22:36,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344045802] [2025-03-09 01:22:36,091 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-09 01:22:36,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:22:36,098 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 15 statements into 2 equivalence classes. [2025-03-09 01:22:36,114 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-03-09 01:22:36,114 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-09 01:22:36,114 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:22:36,319 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2025-03-09 01:22:36,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:22:36,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344045802] [2025-03-09 01:22:36,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344045802] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 01:22:36,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248802870] [2025-03-09 01:22:36,320 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-09 01:22:36,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:22:36,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:22:36,321 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:22:36,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-09 01:22:36,364 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 15 statements into 2 equivalence classes. [2025-03-09 01:22:36,379 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-03-09 01:22:36,379 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-09 01:22:36,379 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:22:36,380 INFO L256 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 23 conjuncts are in the unsatisfiable core [2025-03-09 01:22:36,381 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:22:36,391 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 [2025-03-09 01:22:36,622 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-09 01:22:36,623 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 01:22:36,757 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-09 01:22:36,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248802870] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 01:22:36,758 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-09 01:22:36,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 5, 5] total 13 [2025-03-09 01:22:36,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761649073] [2025-03-09 01:22:36,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-09 01:22:36,758 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-03-09 01:22:36,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:22:36,759 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-03-09 01:22:36,759 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2025-03-09 01:22:37,126 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2025-03-09 01:22:37,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 59 transitions, 337 flow. Second operand has 15 states, 15 states have (on average 20.4) internal successors, (306), 15 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:22:37,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:22:37,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2025-03-09 01:22:37,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:22:37,690 INFO L124 PetriNetUnfolderBase]: 1598/2640 cut-off events. [2025-03-09 01:22:37,690 INFO L125 PetriNetUnfolderBase]: For 4053/4141 co-relation queries the response was YES. [2025-03-09 01:22:37,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8920 conditions, 2640 events. 1598/2640 cut-off events. For 4053/4141 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 14047 event pairs, 327 based on Foata normal form. 48/2678 useless extension candidates. Maximal degree in co-relation 7471. Up to 1004 conditions per place. [2025-03-09 01:22:37,706 INFO L140 encePairwiseOnDemand]: 44/49 looper letters, 104 selfloop transitions, 8 changer transitions 0/117 dead transitions. [2025-03-09 01:22:37,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 117 transitions, 848 flow [2025-03-09 01:22:37,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-09 01:22:37,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-09 01:22:37,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 194 transitions. [2025-03-09 01:22:37,708 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.565597667638484 [2025-03-09 01:22:37,708 INFO L175 Difference]: Start difference. First operand has 67 places, 59 transitions, 337 flow. Second operand 7 states and 194 transitions. [2025-03-09 01:22:37,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 117 transitions, 848 flow [2025-03-09 01:22:37,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 117 transitions, 776 flow, removed 3 selfloop flow, removed 7 redundant places. [2025-03-09 01:22:37,718 INFO L231 Difference]: Finished difference. Result has 65 places, 59 transitions, 307 flow [2025-03-09 01:22:37,718 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=287, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=307, PETRI_PLACES=65, PETRI_TRANSITIONS=59} [2025-03-09 01:22:37,719 INFO L279 CegarLoopForPetriNet]: 48 programPoint places, 17 predicate places. [2025-03-09 01:22:37,720 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 59 transitions, 307 flow [2025-03-09 01:22:37,720 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 20.4) internal successors, (306), 15 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:22:37,720 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:22:37,720 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:22:37,726 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-03-09 01:22:37,924 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2025-03-09 01:22:37,924 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-03-09 01:22:37,924 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:22:37,924 INFO L85 PathProgramCache]: Analyzing trace with hash 416746855, now seen corresponding path program 1 times [2025-03-09 01:22:37,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:22:37,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360017523] [2025-03-09 01:22:37,924 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:22:37,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:22:37,929 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-03-09 01:22:37,933 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-03-09 01:22:37,933 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:22:37,933 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:22:37,998 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-09 01:22:37,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:22:37,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360017523] [2025-03-09 01:22:37,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360017523] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 01:22:37,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830992561] [2025-03-09 01:22:37,998 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:22:37,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:22:37,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:22:38,000 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:22:38,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-09 01:22:38,041 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-03-09 01:22:38,054 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-03-09 01:22:38,055 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:22:38,055 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:22:38,056 INFO L256 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-03-09 01:22:38,056 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:22:38,125 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-09 01:22:38,125 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 01:22:38,179 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-09 01:22:38,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830992561] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 01:22:38,179 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-09 01:22:38,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 13 [2025-03-09 01:22:38,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339068476] [2025-03-09 01:22:38,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-09 01:22:38,180 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-09 01:22:38,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:22:38,180 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-09 01:22:38,180 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2025-03-09 01:22:38,310 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 49 [2025-03-09 01:22:38,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 59 transitions, 307 flow. Second operand has 14 states, 14 states have (on average 23.5) internal successors, (329), 14 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:22:38,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:22:38,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 49 [2025-03-09 01:22:38,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:22:38,671 INFO L124 PetriNetUnfolderBase]: 1310/2172 cut-off events. [2025-03-09 01:22:38,671 INFO L125 PetriNetUnfolderBase]: For 2342/2342 co-relation queries the response was YES. [2025-03-09 01:22:38,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7036 conditions, 2172 events. 1310/2172 cut-off events. For 2342/2342 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 10971 event pairs, 720 based on Foata normal form. 27/2187 useless extension candidates. Maximal degree in co-relation 5349. Up to 1423 conditions per place. [2025-03-09 01:22:38,686 INFO L140 encePairwiseOnDemand]: 42/49 looper letters, 111 selfloop transitions, 10 changer transitions 1/128 dead transitions. [2025-03-09 01:22:38,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 128 transitions, 892 flow [2025-03-09 01:22:38,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-09 01:22:38,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-09 01:22:38,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 273 transitions. [2025-03-09 01:22:38,688 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2025-03-09 01:22:38,688 INFO L175 Difference]: Start difference. First operand has 65 places, 59 transitions, 307 flow. Second operand 9 states and 273 transitions. [2025-03-09 01:22:38,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 128 transitions, 892 flow [2025-03-09 01:22:38,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 128 transitions, 876 flow, removed 1 selfloop flow, removed 4 redundant places. [2025-03-09 01:22:38,694 INFO L231 Difference]: Finished difference. Result has 72 places, 63 transitions, 355 flow [2025-03-09 01:22:38,694 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=295, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=355, PETRI_PLACES=72, PETRI_TRANSITIONS=63} [2025-03-09 01:22:38,695 INFO L279 CegarLoopForPetriNet]: 48 programPoint places, 24 predicate places. [2025-03-09 01:22:38,696 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 63 transitions, 355 flow [2025-03-09 01:22:38,696 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 23.5) internal successors, (329), 14 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:22:38,696 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:22:38,696 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:22:38,702 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-03-09 01:22:38,899 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:22:38,900 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-03-09 01:22:38,900 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:22:38,900 INFO L85 PathProgramCache]: Analyzing trace with hash 865415517, now seen corresponding path program 2 times [2025-03-09 01:22:38,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:22:38,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529978349] [2025-03-09 01:22:38,900 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-09 01:22:38,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:22:38,905 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 17 statements into 2 equivalence classes. [2025-03-09 01:22:38,922 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-03-09 01:22:38,922 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-09 01:22:38,922 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:22:39,075 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-09 01:22:39,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:22:39,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529978349] [2025-03-09 01:22:39,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529978349] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 01:22:39,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682606854] [2025-03-09 01:22:39,076 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-09 01:22:39,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:22:39,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:22:39,078 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:22:39,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-09 01:22:39,118 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 17 statements into 2 equivalence classes. [2025-03-09 01:22:39,134 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-03-09 01:22:39,134 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-09 01:22:39,134 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:22:39,135 INFO L256 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-09 01:22:39,136 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:22:39,263 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-09 01:22:39,264 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 01:22:39,350 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2025-03-09 01:22:39,383 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-09 01:22:39,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682606854] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 01:22:39,383 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-09 01:22:39,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 6] total 15 [2025-03-09 01:22:39,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032169018] [2025-03-09 01:22:39,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-09 01:22:39,383 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-09 01:22:39,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:22:39,384 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-09 01:22:39,384 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2025-03-09 01:22:39,765 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2025-03-09 01:22:39,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 63 transitions, 355 flow. Second operand has 17 states, 17 states have (on average 20.705882352941178) internal successors, (352), 17 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:22:39,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:22:39,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2025-03-09 01:22:39,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:22:40,338 INFO L124 PetriNetUnfolderBase]: 1793/2886 cut-off events. [2025-03-09 01:22:40,338 INFO L125 PetriNetUnfolderBase]: For 3080/3080 co-relation queries the response was YES. [2025-03-09 01:22:40,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9885 conditions, 2886 events. 1793/2886 cut-off events. For 3080/3080 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 14255 event pairs, 364 based on Foata normal form. 88/2962 useless extension candidates. Maximal degree in co-relation 8057. Up to 744 conditions per place. [2025-03-09 01:22:40,353 INFO L140 encePairwiseOnDemand]: 42/49 looper letters, 145 selfloop transitions, 11 changer transitions 0/161 dead transitions. [2025-03-09 01:22:40,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 161 transitions, 1157 flow [2025-03-09 01:22:40,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-09 01:22:40,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-03-09 01:22:40,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 308 transitions. [2025-03-09 01:22:40,356 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2025-03-09 01:22:40,356 INFO L175 Difference]: Start difference. First operand has 72 places, 63 transitions, 355 flow. Second operand 11 states and 308 transitions. [2025-03-09 01:22:40,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 161 transitions, 1157 flow [2025-03-09 01:22:40,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 161 transitions, 1146 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-03-09 01:22:40,361 INFO L231 Difference]: Finished difference. Result has 79 places, 65 transitions, 385 flow [2025-03-09 01:22:40,361 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=340, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=385, PETRI_PLACES=79, PETRI_TRANSITIONS=65} [2025-03-09 01:22:40,361 INFO L279 CegarLoopForPetriNet]: 48 programPoint places, 31 predicate places. [2025-03-09 01:22:40,361 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 65 transitions, 385 flow [2025-03-09 01:22:40,362 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 20.705882352941178) internal successors, (352), 17 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:22:40,362 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:22:40,362 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] [2025-03-09 01:22:40,368 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-03-09 01:22:40,566 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:22:40,566 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-03-09 01:22:40,566 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:22:40,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1874864134, now seen corresponding path program 1 times [2025-03-09 01:22:40,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:22:40,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101621103] [2025-03-09 01:22:40,566 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:22:40,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:22:40,571 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-03-09 01:22:40,575 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-03-09 01:22:40,577 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:22:40,577 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:22:40,644 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-09 01:22:40,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:22:40,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101621103] [2025-03-09 01:22:40,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101621103] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 01:22:40,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525101799] [2025-03-09 01:22:40,645 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:22:40,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:22:40,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:22:40,648 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:22:40,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-09 01:22:40,690 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-03-09 01:22:40,707 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-03-09 01:22:40,707 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:22:40,707 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:22:40,708 INFO L256 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-03-09 01:22:40,709 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:22:40,737 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-09 01:22:40,737 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-09 01:22:40,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525101799] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:22:40,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-09 01:22:40,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2025-03-09 01:22:40,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921185359] [2025-03-09 01:22:40,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:22:40,738 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-09 01:22:40,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:22:40,738 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-09 01:22:40,738 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2025-03-09 01:22:40,752 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 49 [2025-03-09 01:22:40,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 65 transitions, 385 flow. Second operand has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:22:40,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:22:40,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 49 [2025-03-09 01:22:40,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:22:40,984 INFO L124 PetriNetUnfolderBase]: 1803/2934 cut-off events. [2025-03-09 01:22:40,984 INFO L125 PetriNetUnfolderBase]: For 4369/4369 co-relation queries the response was YES. [2025-03-09 01:22:40,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10397 conditions, 2934 events. 1803/2934 cut-off events. For 4369/4369 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 14717 event pairs, 340 based on Foata normal form. 6/2930 useless extension candidates. Maximal degree in co-relation 8521. Up to 2325 conditions per place. [2025-03-09 01:22:40,997 INFO L140 encePairwiseOnDemand]: 43/49 looper letters, 100 selfloop transitions, 16 changer transitions 7/128 dead transitions. [2025-03-09 01:22:40,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 128 transitions, 989 flow [2025-03-09 01:22:40,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-09 01:22:40,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-09 01:22:40,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 180 transitions. [2025-03-09 01:22:40,998 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7346938775510204 [2025-03-09 01:22:40,998 INFO L175 Difference]: Start difference. First operand has 79 places, 65 transitions, 385 flow. Second operand 5 states and 180 transitions. [2025-03-09 01:22:40,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 128 transitions, 989 flow [2025-03-09 01:22:41,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 128 transitions, 956 flow, removed 5 selfloop flow, removed 6 redundant places. [2025-03-09 01:22:41,004 INFO L231 Difference]: Finished difference. Result has 79 places, 79 transitions, 561 flow [2025-03-09 01:22:41,004 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=366, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=561, PETRI_PLACES=79, PETRI_TRANSITIONS=79} [2025-03-09 01:22:41,005 INFO L279 CegarLoopForPetriNet]: 48 programPoint places, 31 predicate places. [2025-03-09 01:22:41,005 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 79 transitions, 561 flow [2025-03-09 01:22:41,005 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:22:41,005 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:22:41,005 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] [2025-03-09 01:22:41,011 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-03-09 01:22:41,209 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2025-03-09 01:22:41,209 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-03-09 01:22:41,209 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:22:41,209 INFO L85 PathProgramCache]: Analyzing trace with hash 567145530, now seen corresponding path program 2 times [2025-03-09 01:22:41,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:22:41,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643476638] [2025-03-09 01:22:41,210 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-09 01:22:41,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:22:41,214 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-03-09 01:22:41,217 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 18 of 21 statements. [2025-03-09 01:22:41,217 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-09 01:22:41,217 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:22:41,257 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-09 01:22:41,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:22:41,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643476638] [2025-03-09 01:22:41,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643476638] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:22:41,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:22:41,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-09 01:22:41,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751685628] [2025-03-09 01:22:41,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:22:41,259 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-09 01:22:41,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:22:41,259 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-09 01:22:41,259 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-09 01:22:41,273 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 49 [2025-03-09 01:22:41,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 79 transitions, 561 flow. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:22:41,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:22:41,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 49 [2025-03-09 01:22:41,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:22:41,502 INFO L124 PetriNetUnfolderBase]: 1957/3143 cut-off events. [2025-03-09 01:22:41,502 INFO L125 PetriNetUnfolderBase]: For 5893/5893 co-relation queries the response was YES. [2025-03-09 01:22:41,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11446 conditions, 3143 events. 1957/3143 cut-off events. For 5893/5893 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 15141 event pairs, 341 based on Foata normal form. 40/3177 useless extension candidates. Maximal degree in co-relation 9591. Up to 2636 conditions per place. [2025-03-09 01:22:41,516 INFO L140 encePairwiseOnDemand]: 42/49 looper letters, 82 selfloop transitions, 11 changer transitions 8/104 dead transitions. [2025-03-09 01:22:41,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 104 transitions, 865 flow [2025-03-09 01:22:41,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-09 01:22:41,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-09 01:22:41,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 135 transitions. [2025-03-09 01:22:41,517 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6887755102040817 [2025-03-09 01:22:41,517 INFO L175 Difference]: Start difference. First operand has 79 places, 79 transitions, 561 flow. Second operand 4 states and 135 transitions. [2025-03-09 01:22:41,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 104 transitions, 865 flow [2025-03-09 01:22:41,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 104 transitions, 859 flow, removed 3 selfloop flow, removed 0 redundant places. [2025-03-09 01:22:41,524 INFO L231 Difference]: Finished difference. Result has 84 places, 76 transitions, 552 flow [2025-03-09 01:22:41,524 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=512, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=552, PETRI_PLACES=84, PETRI_TRANSITIONS=76} [2025-03-09 01:22:41,524 INFO L279 CegarLoopForPetriNet]: 48 programPoint places, 36 predicate places. [2025-03-09 01:22:41,524 INFO L471 AbstractCegarLoop]: Abstraction has has 84 places, 76 transitions, 552 flow [2025-03-09 01:22:41,525 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:22:41,525 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:22:41,525 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] [2025-03-09 01:22:41,525 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2025-03-09 01:22:41,525 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-03-09 01:22:41,526 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:22:41,526 INFO L85 PathProgramCache]: Analyzing trace with hash -1408791737, now seen corresponding path program 1 times [2025-03-09 01:22:41,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:22:41,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569431784] [2025-03-09 01:22:41,526 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:22:41,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:22:41,533 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-03-09 01:22:41,537 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-03-09 01:22:41,537 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:22:41,537 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:22:41,606 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-09 01:22:41,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:22:41,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569431784] [2025-03-09 01:22:41,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569431784] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 01:22:41,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658211030] [2025-03-09 01:22:41,606 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:22:41,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:22:41,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:22:41,609 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:22:41,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-09 01:22:41,649 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-03-09 01:22:41,665 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-03-09 01:22:41,666 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:22:41,666 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:22:41,667 INFO L256 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-03-09 01:22:41,667 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:22:41,697 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-09 01:22:41,697 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-09 01:22:41,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658211030] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:22:41,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-09 01:22:41,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2025-03-09 01:22:41,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038747541] [2025-03-09 01:22:41,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:22:41,697 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-09 01:22:41,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:22:41,697 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-09 01:22:41,697 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2025-03-09 01:22:41,708 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 49 [2025-03-09 01:22:41,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 76 transitions, 552 flow. Second operand has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:22:41,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:22:41,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 49 [2025-03-09 01:22:41,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:22:41,956 INFO L124 PetriNetUnfolderBase]: 1695/2786 cut-off events. [2025-03-09 01:22:41,956 INFO L125 PetriNetUnfolderBase]: For 5140/5140 co-relation queries the response was YES. [2025-03-09 01:22:41,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10219 conditions, 2786 events. 1695/2786 cut-off events. For 5140/5140 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 13802 event pairs, 361 based on Foata normal form. 4/2774 useless extension candidates. Maximal degree in co-relation 8519. Up to 2278 conditions per place. [2025-03-09 01:22:41,969 INFO L140 encePairwiseOnDemand]: 44/49 looper letters, 73 selfloop transitions, 6 changer transitions 7/94 dead transitions. [2025-03-09 01:22:41,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 94 transitions, 783 flow [2025-03-09 01:22:41,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-09 01:22:41,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-09 01:22:41,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 132 transitions. [2025-03-09 01:22:41,970 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.673469387755102 [2025-03-09 01:22:41,971 INFO L175 Difference]: Start difference. First operand has 84 places, 76 transitions, 552 flow. Second operand 4 states and 132 transitions. [2025-03-09 01:22:41,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 94 transitions, 783 flow [2025-03-09 01:22:41,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 94 transitions, 765 flow, removed 5 selfloop flow, removed 2 redundant places. [2025-03-09 01:22:41,978 INFO L231 Difference]: Finished difference. Result has 85 places, 72 transitions, 493 flow [2025-03-09 01:22:41,978 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=504, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=493, PETRI_PLACES=85, PETRI_TRANSITIONS=72} [2025-03-09 01:22:41,978 INFO L279 CegarLoopForPetriNet]: 48 programPoint places, 37 predicate places. [2025-03-09 01:22:41,978 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 72 transitions, 493 flow [2025-03-09 01:22:41,979 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:22:41,979 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:22:41,979 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] [2025-03-09 01:22:41,985 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-03-09 01:22:42,179 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,SelfDestructingSolverStorable15 [2025-03-09 01:22:42,179 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-03-09 01:22:42,180 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:22:42,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1727552075, now seen corresponding path program 2 times [2025-03-09 01:22:42,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:22:42,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431865373] [2025-03-09 01:22:42,180 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-09 01:22:42,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:22:42,187 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-03-09 01:22:42,190 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 18 of 21 statements. [2025-03-09 01:22:42,190 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-09 01:22:42,190 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:22:42,245 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-09 01:22:42,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:22:42,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431865373] [2025-03-09 01:22:42,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431865373] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:22:42,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:22:42,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-09 01:22:42,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128838217] [2025-03-09 01:22:42,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:22:42,246 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-09 01:22:42,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:22:42,246 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-09 01:22:42,247 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2025-03-09 01:22:42,273 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 49 [2025-03-09 01:22:42,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 72 transitions, 493 flow. Second operand has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:22:42,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:22:42,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 49 [2025-03-09 01:22:42,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:22:42,583 INFO L124 PetriNetUnfolderBase]: 1857/2927 cut-off events. [2025-03-09 01:22:42,583 INFO L125 PetriNetUnfolderBase]: For 5781/5781 co-relation queries the response was YES. [2025-03-09 01:22:42,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10722 conditions, 2927 events. 1857/2927 cut-off events. For 5781/5781 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 13344 event pairs, 228 based on Foata normal form. 30/2955 useless extension candidates. Maximal degree in co-relation 9008. Up to 1863 conditions per place. [2025-03-09 01:22:42,598 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 95 selfloop transitions, 21 changer transitions 0/119 dead transitions. [2025-03-09 01:22:42,599 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 119 transitions, 966 flow [2025-03-09 01:22:42,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-09 01:22:42,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-09 01:22:42,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 191 transitions. [2025-03-09 01:22:42,600 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6496598639455783 [2025-03-09 01:22:42,600 INFO L175 Difference]: Start difference. First operand has 85 places, 72 transitions, 493 flow. Second operand 6 states and 191 transitions. [2025-03-09 01:22:42,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 119 transitions, 966 flow [2025-03-09 01:22:42,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 119 transitions, 925 flow, removed 2 selfloop flow, removed 6 redundant places. [2025-03-09 01:22:42,608 INFO L231 Difference]: Finished difference. Result has 84 places, 76 transitions, 568 flow [2025-03-09 01:22:42,608 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=452, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=568, PETRI_PLACES=84, PETRI_TRANSITIONS=76} [2025-03-09 01:22:42,609 INFO L279 CegarLoopForPetriNet]: 48 programPoint places, 36 predicate places. [2025-03-09 01:22:42,609 INFO L471 AbstractCegarLoop]: Abstraction has has 84 places, 76 transitions, 568 flow [2025-03-09 01:22:42,609 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:22:42,609 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:22:42,609 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] [2025-03-09 01:22:42,609 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2025-03-09 01:22:42,609 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-03-09 01:22:42,610 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:22:42,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1786413354, now seen corresponding path program 3 times [2025-03-09 01:22:42,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:22:42,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220477615] [2025-03-09 01:22:42,610 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-09 01:22:42,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:22:42,616 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 3 equivalence classes. [2025-03-09 01:22:42,624 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 20 of 21 statements. [2025-03-09 01:22:42,624 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-09 01:22:42,624 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:22:42,708 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-09 01:22:42,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:22:42,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220477615] [2025-03-09 01:22:42,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220477615] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 01:22:42,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514975875] [2025-03-09 01:22:42,709 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-09 01:22:42,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:22:42,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:22:42,714 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:22:42,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-09 01:22:42,759 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 3 equivalence classes. [2025-03-09 01:22:42,775 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 20 of 21 statements. [2025-03-09 01:22:42,775 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-09 01:22:42,775 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:22:42,776 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-09 01:22:42,777 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:22:42,848 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-09 01:22:42,848 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 01:22:42,898 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-09 01:22:42,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514975875] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 01:22:42,898 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-09 01:22:42,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2025-03-09 01:22:42,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791797914] [2025-03-09 01:22:42,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-09 01:22:42,899 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-09 01:22:42,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:22:42,899 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-09 01:22:42,899 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2025-03-09 01:22:42,976 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 49 [2025-03-09 01:22:42,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 76 transitions, 568 flow. Second operand has 12 states, 12 states have (on average 23.75) internal successors, (285), 12 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:22:42,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:22:42,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 49 [2025-03-09 01:22:42,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:22:43,366 INFO L124 PetriNetUnfolderBase]: 1792/2825 cut-off events. [2025-03-09 01:22:43,366 INFO L125 PetriNetUnfolderBase]: For 7544/7544 co-relation queries the response was YES. [2025-03-09 01:22:43,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11048 conditions, 2825 events. 1792/2825 cut-off events. For 7544/7544 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 12998 event pairs, 84 based on Foata normal form. 44/2867 useless extension candidates. Maximal degree in co-relation 9329. Up to 966 conditions per place. [2025-03-09 01:22:43,378 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 151 selfloop transitions, 34 changer transitions 0/188 dead transitions. [2025-03-09 01:22:43,378 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 188 transitions, 1589 flow [2025-03-09 01:22:43,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-09 01:22:43,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-03-09 01:22:43,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 369 transitions. [2025-03-09 01:22:43,379 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6275510204081632 [2025-03-09 01:22:43,379 INFO L175 Difference]: Start difference. First operand has 84 places, 76 transitions, 568 flow. Second operand 12 states and 369 transitions. [2025-03-09 01:22:43,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 188 transitions, 1589 flow [2025-03-09 01:22:43,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 188 transitions, 1559 flow, removed 8 selfloop flow, removed 2 redundant places. [2025-03-09 01:22:43,389 INFO L231 Difference]: Finished difference. Result has 97 places, 88 transitions, 787 flow [2025-03-09 01:22:43,389 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=529, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=787, PETRI_PLACES=97, PETRI_TRANSITIONS=88} [2025-03-09 01:22:43,390 INFO L279 CegarLoopForPetriNet]: 48 programPoint places, 49 predicate places. [2025-03-09 01:22:43,390 INFO L471 AbstractCegarLoop]: Abstraction has has 97 places, 88 transitions, 787 flow [2025-03-09 01:22:43,390 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 23.75) internal successors, (285), 12 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:22:43,390 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:22:43,390 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, 1, 1] [2025-03-09 01:22:43,396 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-03-09 01:22:43,590 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-03-09 01:22:43,590 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-03-09 01:22:43,591 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:22:43,591 INFO L85 PathProgramCache]: Analyzing trace with hash -635743260, now seen corresponding path program 1 times [2025-03-09 01:22:43,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:22:43,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274106197] [2025-03-09 01:22:43,591 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:22:43,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:22:43,596 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-03-09 01:22:43,616 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-03-09 01:22:43,616 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:22:43,616 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:22:43,946 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-09 01:22:43,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:22:43,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274106197] [2025-03-09 01:22:43,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274106197] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:22:43,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:22:43,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2025-03-09 01:22:43,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050295083] [2025-03-09 01:22:43,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:22:43,948 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-09 01:22:43,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:22:43,948 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-09 01:22:43,948 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2025-03-09 01:22:44,445 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 49 [2025-03-09 01:22:44,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 88 transitions, 787 flow. Second operand has 12 states, 12 states have (on average 23.75) internal successors, (285), 12 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:22:44,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:22:44,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 49 [2025-03-09 01:22:44,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:22:45,166 INFO L124 PetriNetUnfolderBase]: 1909/3173 cut-off events. [2025-03-09 01:22:45,166 INFO L125 PetriNetUnfolderBase]: For 11691/11691 co-relation queries the response was YES. [2025-03-09 01:22:45,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13886 conditions, 3173 events. 1909/3173 cut-off events. For 11691/11691 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 16179 event pairs, 22 based on Foata normal form. 2/3163 useless extension candidates. Maximal degree in co-relation 12511. Up to 1397 conditions per place. [2025-03-09 01:22:45,181 INFO L140 encePairwiseOnDemand]: 35/49 looper letters, 155 selfloop transitions, 75 changer transitions 3/245 dead transitions. [2025-03-09 01:22:45,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 245 transitions, 2416 flow [2025-03-09 01:22:45,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-03-09 01:22:45,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2025-03-09 01:22:45,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 514 transitions. [2025-03-09 01:22:45,182 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6556122448979592 [2025-03-09 01:22:45,183 INFO L175 Difference]: Start difference. First operand has 97 places, 88 transitions, 787 flow. Second operand 16 states and 514 transitions. [2025-03-09 01:22:45,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 245 transitions, 2416 flow [2025-03-09 01:22:45,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 245 transitions, 2287 flow, removed 21 selfloop flow, removed 6 redundant places. [2025-03-09 01:22:45,201 INFO L231 Difference]: Finished difference. Result has 114 places, 144 transitions, 1606 flow [2025-03-09 01:22:45,203 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=724, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1606, PETRI_PLACES=114, PETRI_TRANSITIONS=144} [2025-03-09 01:22:45,203 INFO L279 CegarLoopForPetriNet]: 48 programPoint places, 66 predicate places. [2025-03-09 01:22:45,203 INFO L471 AbstractCegarLoop]: Abstraction has has 114 places, 144 transitions, 1606 flow [2025-03-09 01:22:45,204 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 23.75) internal successors, (285), 12 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:22:45,204 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:22:45,204 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, 1, 1] [2025-03-09 01:22:45,204 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2025-03-09 01:22:45,204 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-03-09 01:22:45,204 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:22:45,204 INFO L85 PathProgramCache]: Analyzing trace with hash -144484950, now seen corresponding path program 2 times [2025-03-09 01:22:45,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:22:45,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561248613] [2025-03-09 01:22:45,205 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-09 01:22:45,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:22:45,210 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 26 statements into 2 equivalence classes. [2025-03-09 01:22:45,218 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 23 of 26 statements. [2025-03-09 01:22:45,218 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-09 01:22:45,218 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:22:45,444 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-09 01:22:45,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:22:45,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561248613] [2025-03-09 01:22:45,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561248613] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:22:45,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:22:45,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2025-03-09 01:22:45,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325104941] [2025-03-09 01:22:45,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:22:45,445 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-09 01:22:45,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:22:45,445 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-09 01:22:45,446 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2025-03-09 01:22:45,601 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 49 [2025-03-09 01:22:45,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 144 transitions, 1606 flow. Second operand has 11 states, 11 states have (on average 23.90909090909091) internal successors, (263), 11 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:22:45,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:22:45,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 49 [2025-03-09 01:22:45,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:22:46,171 INFO L124 PetriNetUnfolderBase]: 2715/4453 cut-off events. [2025-03-09 01:22:46,171 INFO L125 PetriNetUnfolderBase]: For 22634/22634 co-relation queries the response was YES. [2025-03-09 01:22:46,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22378 conditions, 4453 events. 2715/4453 cut-off events. For 22634/22634 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 24002 event pairs, 304 based on Foata normal form. 2/4439 useless extension candidates. Maximal degree in co-relation 20031. Up to 2470 conditions per place. [2025-03-09 01:22:46,200 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 181 selfloop transitions, 112 changer transitions 5/310 dead transitions. [2025-03-09 01:22:46,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 310 transitions, 3786 flow [2025-03-09 01:22:46,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-09 01:22:46,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-03-09 01:22:46,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 401 transitions. [2025-03-09 01:22:46,202 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6819727891156463 [2025-03-09 01:22:46,202 INFO L175 Difference]: Start difference. First operand has 114 places, 144 transitions, 1606 flow. Second operand 12 states and 401 transitions. [2025-03-09 01:22:46,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 310 transitions, 3786 flow [2025-03-09 01:22:46,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 310 transitions, 3564 flow, removed 78 selfloop flow, removed 4 redundant places. [2025-03-09 01:22:46,259 INFO L231 Difference]: Finished difference. Result has 126 places, 230 transitions, 2957 flow [2025-03-09 01:22:46,260 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1466, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2957, PETRI_PLACES=126, PETRI_TRANSITIONS=230} [2025-03-09 01:22:46,260 INFO L279 CegarLoopForPetriNet]: 48 programPoint places, 78 predicate places. [2025-03-09 01:22:46,260 INFO L471 AbstractCegarLoop]: Abstraction has has 126 places, 230 transitions, 2957 flow [2025-03-09 01:22:46,260 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 23.90909090909091) internal successors, (263), 11 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:22:46,260 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:22:46,260 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, 1, 1] [2025-03-09 01:22:46,260 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2025-03-09 01:22:46,260 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-03-09 01:22:46,261 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:22:46,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1843043774, now seen corresponding path program 1 times [2025-03-09 01:22:46,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:22:46,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449458165] [2025-03-09 01:22:46,261 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:22:46,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:22:46,265 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-03-09 01:22:46,272 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-03-09 01:22:46,273 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:22:46,273 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:22:46,662 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-09 01:22:46,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:22:46,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449458165] [2025-03-09 01:22:46,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449458165] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:22:46,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:22:46,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2025-03-09 01:22:46,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814546728] [2025-03-09 01:22:46,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:22:46,663 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-09 01:22:46,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:22:46,663 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-09 01:22:46,663 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2025-03-09 01:22:47,027 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 49 [2025-03-09 01:22:47,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 230 transitions, 2957 flow. Second operand has 13 states, 13 states have (on average 23.615384615384617) internal successors, (307), 13 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:22:47,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:22:47,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 49 [2025-03-09 01:22:47,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:22:47,981 INFO L124 PetriNetUnfolderBase]: 4027/6515 cut-off events. [2025-03-09 01:22:47,982 INFO L125 PetriNetUnfolderBase]: For 39456/39456 co-relation queries the response was YES. [2025-03-09 01:22:48,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35452 conditions, 6515 events. 4027/6515 cut-off events. For 39456/39456 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 37337 event pairs, 616 based on Foata normal form. 2/6503 useless extension candidates. Maximal degree in co-relation 32870. Up to 4145 conditions per place. [2025-03-09 01:22:48,023 INFO L140 encePairwiseOnDemand]: 35/49 looper letters, 318 selfloop transitions, 117 changer transitions 3/450 dead transitions. [2025-03-09 01:22:48,024 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 450 transitions, 6302 flow [2025-03-09 01:22:48,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-09 01:22:48,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2025-03-09 01:22:48,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 468 transitions. [2025-03-09 01:22:48,029 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.636734693877551 [2025-03-09 01:22:48,029 INFO L175 Difference]: Start difference. First operand has 126 places, 230 transitions, 2957 flow. Second operand 15 states and 468 transitions. [2025-03-09 01:22:48,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 450 transitions, 6302 flow [2025-03-09 01:22:48,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 450 transitions, 6011 flow, removed 103 selfloop flow, removed 2 redundant places. [2025-03-09 01:22:48,152 INFO L231 Difference]: Finished difference. Result has 149 places, 332 transitions, 4573 flow [2025-03-09 01:22:48,152 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2784, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=4573, PETRI_PLACES=149, PETRI_TRANSITIONS=332} [2025-03-09 01:22:48,153 INFO L279 CegarLoopForPetriNet]: 48 programPoint places, 101 predicate places. [2025-03-09 01:22:48,153 INFO L471 AbstractCegarLoop]: Abstraction has has 149 places, 332 transitions, 4573 flow [2025-03-09 01:22:48,153 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 23.615384615384617) internal successors, (307), 13 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:22:48,153 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:22:48,153 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, 1, 1] [2025-03-09 01:22:48,153 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2025-03-09 01:22:48,153 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-03-09 01:22:48,154 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:22:48,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1685128178, now seen corresponding path program 2 times [2025-03-09 01:22:48,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:22:48,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010668103] [2025-03-09 01:22:48,154 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-09 01:22:48,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:22:48,159 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 26 statements into 2 equivalence classes. [2025-03-09 01:22:48,163 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 23 of 26 statements. [2025-03-09 01:22:48,163 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-09 01:22:48,163 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:22:48,373 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-09 01:22:48,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:22:48,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010668103] [2025-03-09 01:22:48,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010668103] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:22:48,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:22:48,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2025-03-09 01:22:48,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326921117] [2025-03-09 01:22:48,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:22:48,375 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-09 01:22:48,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:22:48,375 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-09 01:22:48,375 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2025-03-09 01:22:48,537 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 49 [2025-03-09 01:22:48,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 332 transitions, 4573 flow. Second operand has 10 states, 10 states have (on average 24.1) internal successors, (241), 10 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:22:48,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:22:48,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 49 [2025-03-09 01:22:48,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:22:49,564 INFO L124 PetriNetUnfolderBase]: 4308/6983 cut-off events. [2025-03-09 01:22:49,564 INFO L125 PetriNetUnfolderBase]: For 49639/49683 co-relation queries the response was YES. [2025-03-09 01:22:49,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41321 conditions, 6983 events. 4308/6983 cut-off events. For 49639/49683 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 40520 event pairs, 307 based on Foata normal form. 4/6973 useless extension candidates. Maximal degree in co-relation 38141. Up to 3044 conditions per place. [2025-03-09 01:22:49,619 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 226 selfloop transitions, 183 changer transitions 3/424 dead transitions. [2025-03-09 01:22:49,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 424 transitions, 6209 flow [2025-03-09 01:22:49,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-09 01:22:49,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-09 01:22:49,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 321 transitions. [2025-03-09 01:22:49,620 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7278911564625851 [2025-03-09 01:22:49,620 INFO L175 Difference]: Start difference. First operand has 149 places, 332 transitions, 4573 flow. Second operand 9 states and 321 transitions. [2025-03-09 01:22:49,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 424 transitions, 6209 flow [2025-03-09 01:22:49,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 424 transitions, 6133 flow, removed 29 selfloop flow, removed 2 redundant places. [2025-03-09 01:22:49,853 INFO L231 Difference]: Finished difference. Result has 158 places, 348 transitions, 5303 flow [2025-03-09 01:22:49,853 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=4497, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5303, PETRI_PLACES=158, PETRI_TRANSITIONS=348} [2025-03-09 01:22:49,854 INFO L279 CegarLoopForPetriNet]: 48 programPoint places, 110 predicate places. [2025-03-09 01:22:49,854 INFO L471 AbstractCegarLoop]: Abstraction has has 158 places, 348 transitions, 5303 flow [2025-03-09 01:22:49,854 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 24.1) internal successors, (241), 10 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:22:49,854 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:22:49,854 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, 1, 1] [2025-03-09 01:22:49,854 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2025-03-09 01:22:49,854 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-03-09 01:22:49,854 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:22:49,854 INFO L85 PathProgramCache]: Analyzing trace with hash -265443468, now seen corresponding path program 3 times [2025-03-09 01:22:49,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:22:49,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592221210] [2025-03-09 01:22:49,855 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-09 01:22:49,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:22:49,859 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 26 statements into 3 equivalence classes. [2025-03-09 01:22:49,864 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) and asserted 23 of 26 statements. [2025-03-09 01:22:49,864 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2025-03-09 01:22:49,864 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:22:50,123 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-09 01:22:50,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:22:50,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592221210] [2025-03-09 01:22:50,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592221210] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:22:50,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:22:50,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2025-03-09 01:22:50,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073485132] [2025-03-09 01:22:50,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:22:50,124 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-09 01:22:50,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:22:50,124 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-09 01:22:50,126 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2025-03-09 01:22:50,304 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 49 [2025-03-09 01:22:50,304 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 348 transitions, 5303 flow. Second operand has 10 states, 10 states have (on average 24.1) internal successors, (241), 10 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:22:50,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:22:50,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 49 [2025-03-09 01:22:50,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:22:51,523 INFO L124 PetriNetUnfolderBase]: 4610/7488 cut-off events. [2025-03-09 01:22:51,523 INFO L125 PetriNetUnfolderBase]: For 65358/65402 co-relation queries the response was YES. [2025-03-09 01:22:51,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47049 conditions, 7488 events. 4610/7488 cut-off events. For 65358/65402 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 44108 event pairs, 317 based on Foata normal form. 4/7474 useless extension candidates. Maximal degree in co-relation 43724. Up to 2719 conditions per place. [2025-03-09 01:22:51,583 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 220 selfloop transitions, 210 changer transitions 7/449 dead transitions. [2025-03-09 01:22:51,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 449 transitions, 7116 flow [2025-03-09 01:22:51,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-09 01:22:51,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-09 01:22:51,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 352 transitions. [2025-03-09 01:22:51,589 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7183673469387755 [2025-03-09 01:22:51,589 INFO L175 Difference]: Start difference. First operand has 158 places, 348 transitions, 5303 flow. Second operand 10 states and 352 transitions. [2025-03-09 01:22:51,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 449 transitions, 7116 flow [2025-03-09 01:22:51,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 449 transitions, 6963 flow, removed 30 selfloop flow, removed 4 redundant places. [2025-03-09 01:22:51,810 INFO L231 Difference]: Finished difference. Result has 167 places, 363 transitions, 6067 flow [2025-03-09 01:22:51,810 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=5156, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=197, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6067, PETRI_PLACES=167, PETRI_TRANSITIONS=363} [2025-03-09 01:22:51,811 INFO L279 CegarLoopForPetriNet]: 48 programPoint places, 119 predicate places. [2025-03-09 01:22:51,811 INFO L471 AbstractCegarLoop]: Abstraction has has 167 places, 363 transitions, 6067 flow [2025-03-09 01:22:51,811 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 24.1) internal successors, (241), 10 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:22:51,811 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:22:51,811 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, 1, 1] [2025-03-09 01:22:51,811 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2025-03-09 01:22:51,811 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-03-09 01:22:51,811 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:22:51,811 INFO L85 PathProgramCache]: Analyzing trace with hash -221476458, now seen corresponding path program 4 times [2025-03-09 01:22:51,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:22:51,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746032821] [2025-03-09 01:22:51,811 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-09 01:22:51,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:22:51,816 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 26 statements into 2 equivalence classes. [2025-03-09 01:22:51,823 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-03-09 01:22:51,823 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-09 01:22:51,823 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:22:52,269 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-09 01:22:52,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:22:52,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746032821] [2025-03-09 01:22:52,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746032821] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 01:22:52,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000520166] [2025-03-09 01:22:52,270 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-09 01:22:52,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:22:52,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:22:52,273 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:22:52,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-09 01:22:52,318 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 26 statements into 2 equivalence classes. [2025-03-09 01:22:52,339 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-03-09 01:22:52,340 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-09 01:22:52,340 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:22:52,341 INFO L256 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 34 conjuncts are in the unsatisfiable core [2025-03-09 01:22:52,342 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:22:52,355 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 1 [2025-03-09 01:22:52,489 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-09 01:22:52,520 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-09 01:22:52,521 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 01:22:52,614 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-09 01:22:52,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000520166] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-09 01:22:52,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-09 01:22:52,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [12, 10] total 22 [2025-03-09 01:22:52,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921181200] [2025-03-09 01:22:52,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:22:52,615 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-09 01:22:52,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:22:52,615 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-09 01:22:52,617 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2025-03-09 01:22:52,808 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 49 [2025-03-09 01:22:52,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 363 transitions, 6067 flow. Second operand has 9 states, 9 states have (on average 24.333333333333332) internal successors, (219), 9 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:22:52,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:22:52,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 49 [2025-03-09 01:22:52,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:22:53,980 INFO L124 PetriNetUnfolderBase]: 5125/8275 cut-off events. [2025-03-09 01:22:53,980 INFO L125 PetriNetUnfolderBase]: For 85084/85128 co-relation queries the response was YES. [2025-03-09 01:22:54,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55606 conditions, 8275 events. 5125/8275 cut-off events. For 85084/85128 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 49283 event pairs, 624 based on Foata normal form. 4/8261 useless extension candidates. Maximal degree in co-relation 52117. Up to 4550 conditions per place. [2025-03-09 01:22:54,041 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 253 selfloop transitions, 212 changer transitions 18/495 dead transitions. [2025-03-09 01:22:54,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 495 transitions, 8669 flow [2025-03-09 01:22:54,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-09 01:22:54,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2025-03-09 01:22:54,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 455 transitions. [2025-03-09 01:22:54,042 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6632653061224489 [2025-03-09 01:22:54,042 INFO L175 Difference]: Start difference. First operand has 167 places, 363 transitions, 6067 flow. Second operand 14 states and 455 transitions. [2025-03-09 01:22:54,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 495 transitions, 8669 flow [2025-03-09 01:22:54,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 495 transitions, 8333 flow, removed 47 selfloop flow, removed 6 redundant places. [2025-03-09 01:22:54,326 INFO L231 Difference]: Finished difference. Result has 177 places, 397 transitions, 7089 flow [2025-03-09 01:22:54,326 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=5777, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=7089, PETRI_PLACES=177, PETRI_TRANSITIONS=397} [2025-03-09 01:22:54,326 INFO L279 CegarLoopForPetriNet]: 48 programPoint places, 129 predicate places. [2025-03-09 01:22:54,326 INFO L471 AbstractCegarLoop]: Abstraction has has 177 places, 397 transitions, 7089 flow [2025-03-09 01:22:54,326 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 24.333333333333332) internal successors, (219), 9 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:22:54,326 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:22:54,326 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, 1, 1] [2025-03-09 01:22:54,332 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2025-03-09 01:22:54,527 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2025-03-09 01:22:54,527 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-03-09 01:22:54,527 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:22:54,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1538682964, now seen corresponding path program 3 times [2025-03-09 01:22:54,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:22:54,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306305854] [2025-03-09 01:22:54,528 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-09 01:22:54,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:22:54,532 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 26 statements into 3 equivalence classes. [2025-03-09 01:22:54,537 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) and asserted 23 of 26 statements. [2025-03-09 01:22:54,537 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2025-03-09 01:22:54,537 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:22:54,851 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-09 01:22:54,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:22:54,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306305854] [2025-03-09 01:22:54,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306305854] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:22:54,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:22:54,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2025-03-09 01:22:54,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664517474] [2025-03-09 01:22:54,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:22:54,852 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-09 01:22:54,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:22:54,852 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-09 01:22:54,852 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2025-03-09 01:22:55,000 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 49 [2025-03-09 01:22:55,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 397 transitions, 7089 flow. Second operand has 10 states, 10 states have (on average 24.1) internal successors, (241), 10 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:22:55,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:22:55,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 49 [2025-03-09 01:22:55,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:22:56,761 INFO L124 PetriNetUnfolderBase]: 6484/10399 cut-off events. [2025-03-09 01:22:56,761 INFO L125 PetriNetUnfolderBase]: For 124765/124809 co-relation queries the response was YES. [2025-03-09 01:22:56,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72726 conditions, 10399 events. 6484/10399 cut-off events. For 124765/124809 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 64487 event pairs, 833 based on Foata normal form. 4/10385 useless extension candidates. Maximal degree in co-relation 69269. Up to 5757 conditions per place. [2025-03-09 01:22:56,837 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 319 selfloop transitions, 231 changer transitions 15/577 dead transitions. [2025-03-09 01:22:56,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 577 transitions, 11095 flow [2025-03-09 01:22:56,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-09 01:22:56,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-09 01:22:56,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 317 transitions. [2025-03-09 01:22:56,838 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7188208616780045 [2025-03-09 01:22:56,838 INFO L175 Difference]: Start difference. First operand has 177 places, 397 transitions, 7089 flow. Second operand 9 states and 317 transitions. [2025-03-09 01:22:56,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 577 transitions, 11095 flow [2025-03-09 01:22:57,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 577 transitions, 10658 flow, removed 112 selfloop flow, removed 8 redundant places. [2025-03-09 01:22:57,272 INFO L231 Difference]: Finished difference. Result has 181 places, 487 transitions, 9465 flow [2025-03-09 01:22:57,272 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=6774, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9465, PETRI_PLACES=181, PETRI_TRANSITIONS=487} [2025-03-09 01:22:57,272 INFO L279 CegarLoopForPetriNet]: 48 programPoint places, 133 predicate places. [2025-03-09 01:22:57,272 INFO L471 AbstractCegarLoop]: Abstraction has has 181 places, 487 transitions, 9465 flow [2025-03-09 01:22:57,272 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 24.1) internal successors, (241), 10 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:22:57,272 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:22:57,272 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, 1, 1] [2025-03-09 01:22:57,273 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2025-03-09 01:22:57,273 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-03-09 01:22:57,273 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:22:57,273 INFO L85 PathProgramCache]: Analyzing trace with hash 208674164, now seen corresponding path program 5 times [2025-03-09 01:22:57,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:22:57,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649113313] [2025-03-09 01:22:57,273 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-09 01:22:57,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:22:57,279 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 26 statements into 3 equivalence classes. [2025-03-09 01:22:57,286 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 26 of 26 statements. [2025-03-09 01:22:57,286 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-03-09 01:22:57,286 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:22:57,560 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-09 01:22:57,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:22:57,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649113313] [2025-03-09 01:22:57,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649113313] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:22:57,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:22:57,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2025-03-09 01:22:57,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725111601] [2025-03-09 01:22:57,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:22:57,561 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-09 01:22:57,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:22:57,561 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-09 01:22:57,561 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2025-03-09 01:22:57,894 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 49 [2025-03-09 01:22:57,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 487 transitions, 9465 flow. Second operand has 13 states, 13 states have (on average 23.615384615384617) internal successors, (307), 13 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:22:57,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:22:57,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 49 [2025-03-09 01:22:57,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:23:00,159 INFO L124 PetriNetUnfolderBase]: 8527/13527 cut-off events. [2025-03-09 01:23:00,160 INFO L125 PetriNetUnfolderBase]: For 187219/187263 co-relation queries the response was YES. [2025-03-09 01:23:00,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100204 conditions, 13527 events. 8527/13527 cut-off events. For 187219/187263 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 86814 event pairs, 1273 based on Foata normal form. 4/13513 useless extension candidates. Maximal degree in co-relation 96718. Up to 7576 conditions per place. [2025-03-09 01:23:00,264 INFO L140 encePairwiseOnDemand]: 35/49 looper letters, 391 selfloop transitions, 307 changer transitions 9/719 dead transitions. [2025-03-09 01:23:00,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 719 transitions, 15140 flow [2025-03-09 01:23:00,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-09 01:23:00,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2025-03-09 01:23:00,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 468 transitions. [2025-03-09 01:23:00,266 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.636734693877551 [2025-03-09 01:23:00,266 INFO L175 Difference]: Start difference. First operand has 181 places, 487 transitions, 9465 flow. Second operand 15 states and 468 transitions. [2025-03-09 01:23:00,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 719 transitions, 15140 flow [2025-03-09 01:23:00,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 719 transitions, 14894 flow, removed 88 selfloop flow, removed 3 redundant places. [2025-03-09 01:23:00,955 INFO L231 Difference]: Finished difference. Result has 200 places, 636 transitions, 13994 flow [2025-03-09 01:23:00,955 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=9315, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=13994, PETRI_PLACES=200, PETRI_TRANSITIONS=636} [2025-03-09 01:23:00,956 INFO L279 CegarLoopForPetriNet]: 48 programPoint places, 152 predicate places. [2025-03-09 01:23:00,956 INFO L471 AbstractCegarLoop]: Abstraction has has 200 places, 636 transitions, 13994 flow [2025-03-09 01:23:00,956 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 23.615384615384617) internal successors, (307), 13 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:23:00,956 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:23:00,956 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, 1, 1] [2025-03-09 01:23:00,958 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2025-03-09 01:23:00,958 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-03-09 01:23:00,958 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:23:00,958 INFO L85 PathProgramCache]: Analyzing trace with hash 2086751562, now seen corresponding path program 6 times [2025-03-09 01:23:00,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:23:00,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870309179] [2025-03-09 01:23:00,959 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-09 01:23:00,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:23:00,965 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 26 statements into 3 equivalence classes. [2025-03-09 01:23:00,974 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 26 of 26 statements. [2025-03-09 01:23:00,974 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-03-09 01:23:00,974 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:23:01,242 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-09 01:23:01,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:23:01,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870309179] [2025-03-09 01:23:01,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870309179] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 01:23:01,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26460405] [2025-03-09 01:23:01,243 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-09 01:23:01,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:23:01,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:23:01,245 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:23:01,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-09 01:23:01,287 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 26 statements into 3 equivalence classes. [2025-03-09 01:23:01,308 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 26 of 26 statements. [2025-03-09 01:23:01,308 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-03-09 01:23:01,308 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:23:01,309 INFO L256 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 34 conjuncts are in the unsatisfiable core [2025-03-09 01:23:01,313 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:23:01,325 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 1 [2025-03-09 01:23:01,473 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-09 01:23:01,509 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-09 01:23:01,509 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 01:23:01,582 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-09 01:23:01,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26460405] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 01:23:01,582 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-09 01:23:01,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 22 [2025-03-09 01:23:01,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317994803] [2025-03-09 01:23:01,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-09 01:23:01,583 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-03-09 01:23:01,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:23:01,583 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-03-09 01:23:01,583 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2025-03-09 01:23:02,027 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 49 [2025-03-09 01:23:02,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 636 transitions, 13994 flow. Second operand has 22 states, 22 states have (on average 24.454545454545453) internal successors, (538), 22 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:23:02,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:23:02,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 49 [2025-03-09 01:23:02,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:23:05,145 INFO L124 PetriNetUnfolderBase]: 9157/14477 cut-off events. [2025-03-09 01:23:05,145 INFO L125 PetriNetUnfolderBase]: For 231213/231257 co-relation queries the response was YES. [2025-03-09 01:23:05,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112404 conditions, 14477 events. 9157/14477 cut-off events. For 231213/231257 co-relation queries the response was YES. Maximal size of possible extension queue 514. Compared 93426 event pairs, 1027 based on Foata normal form. 4/14463 useless extension candidates. Maximal degree in co-relation 108876. Up to 5932 conditions per place. [2025-03-09 01:23:05,322 INFO L140 encePairwiseOnDemand]: 35/49 looper letters, 264 selfloop transitions, 450 changer transitions 11/737 dead transitions. [2025-03-09 01:23:05,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 737 transitions, 16686 flow [2025-03-09 01:23:05,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-09 01:23:05,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2025-03-09 01:23:05,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 442 transitions. [2025-03-09 01:23:05,323 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6443148688046647 [2025-03-09 01:23:05,323 INFO L175 Difference]: Start difference. First operand has 200 places, 636 transitions, 13994 flow. Second operand 14 states and 442 transitions. [2025-03-09 01:23:05,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 737 transitions, 16686 flow [2025-03-09 01:23:06,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 737 transitions, 16485 flow, removed 65 selfloop flow, removed 4 redundant places. [2025-03-09 01:23:06,482 INFO L231 Difference]: Finished difference. Result has 212 places, 654 transitions, 15534 flow [2025-03-09 01:23:06,482 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=13795, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=636, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=428, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=15534, PETRI_PLACES=212, PETRI_TRANSITIONS=654} [2025-03-09 01:23:06,482 INFO L279 CegarLoopForPetriNet]: 48 programPoint places, 164 predicate places. [2025-03-09 01:23:06,482 INFO L471 AbstractCegarLoop]: Abstraction has has 212 places, 654 transitions, 15534 flow [2025-03-09 01:23:06,483 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 24.454545454545453) internal successors, (538), 22 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:23:06,483 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:23:06,483 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, 1, 1] [2025-03-09 01:23:06,488 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2025-03-09 01:23:06,683 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,SelfDestructingSolverStorable26 [2025-03-09 01:23:06,683 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-03-09 01:23:06,684 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:23:06,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1590824232, now seen corresponding path program 7 times [2025-03-09 01:23:06,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:23:06,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245019571] [2025-03-09 01:23:06,684 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-09 01:23:06,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:23:06,688 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-03-09 01:23:06,694 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-03-09 01:23:06,694 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:23:06,694 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:23:06,966 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-09 01:23:06,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:23:06,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245019571] [2025-03-09 01:23:06,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245019571] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:23:06,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:23:06,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2025-03-09 01:23:06,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207966120] [2025-03-09 01:23:06,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:23:06,966 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-09 01:23:06,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:23:06,967 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-09 01:23:06,967 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2025-03-09 01:23:07,243 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 49 [2025-03-09 01:23:07,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 654 transitions, 15534 flow. Second operand has 13 states, 13 states have (on average 23.615384615384617) internal successors, (307), 13 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:23:07,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:23:07,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 49 [2025-03-09 01:23:07,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:23:10,538 INFO L124 PetriNetUnfolderBase]: 11102/17516 cut-off events. [2025-03-09 01:23:10,538 INFO L125 PetriNetUnfolderBase]: For 320967/320991 co-relation queries the response was YES. [2025-03-09 01:23:10,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143290 conditions, 17516 events. 11102/17516 cut-off events. For 320967/320991 co-relation queries the response was YES. Maximal size of possible extension queue 615. Compared 116133 event pairs, 1955 based on Foata normal form. 8/17508 useless extension candidates. Maximal degree in co-relation 139712. Up to 11466 conditions per place. [2025-03-09 01:23:10,710 INFO L140 encePairwiseOnDemand]: 34/49 looper letters, 605 selfloop transitions, 380 changer transitions 5/1002 dead transitions. [2025-03-09 01:23:10,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 1002 transitions, 24187 flow [2025-03-09 01:23:10,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-03-09 01:23:10,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2025-03-09 01:23:10,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 665 transitions. [2025-03-09 01:23:10,711 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6168831168831169 [2025-03-09 01:23:10,711 INFO L175 Difference]: Start difference. First operand has 212 places, 654 transitions, 15534 flow. Second operand 22 states and 665 transitions. [2025-03-09 01:23:10,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 1002 transitions, 24187 flow [2025-03-09 01:23:12,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 1002 transitions, 23508 flow, removed 87 selfloop flow, removed 9 redundant places. [2025-03-09 01:23:12,267 INFO L231 Difference]: Finished difference. Result has 237 places, 856 transitions, 21420 flow [2025-03-09 01:23:12,268 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=15075, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=654, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=208, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=21420, PETRI_PLACES=237, PETRI_TRANSITIONS=856} [2025-03-09 01:23:12,268 INFO L279 CegarLoopForPetriNet]: 48 programPoint places, 189 predicate places. [2025-03-09 01:23:12,268 INFO L471 AbstractCegarLoop]: Abstraction has has 237 places, 856 transitions, 21420 flow [2025-03-09 01:23:12,268 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 23.615384615384617) internal successors, (307), 13 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:23:12,268 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:23:12,268 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, 1, 1] [2025-03-09 01:23:12,269 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2025-03-09 01:23:12,269 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-03-09 01:23:12,269 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:23:12,269 INFO L85 PathProgramCache]: Analyzing trace with hash 1678598244, now seen corresponding path program 8 times [2025-03-09 01:23:12,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:23:12,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113872417] [2025-03-09 01:23:12,269 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-09 01:23:12,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:23:12,274 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 26 statements into 2 equivalence classes. [2025-03-09 01:23:12,277 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 23 of 26 statements. [2025-03-09 01:23:12,277 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-09 01:23:12,277 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:23:12,413 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-09 01:23:12,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:23:12,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113872417] [2025-03-09 01:23:12,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113872417] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:23:12,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:23:12,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2025-03-09 01:23:12,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367391173] [2025-03-09 01:23:12,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:23:12,413 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-09 01:23:12,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:23:12,414 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-09 01:23:12,414 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2025-03-09 01:23:12,572 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 49 [2025-03-09 01:23:12,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 856 transitions, 21420 flow. Second operand has 10 states, 10 states have (on average 24.1) internal successors, (241), 10 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:23:12,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:23:12,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 49 [2025-03-09 01:23:12,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:23:16,710 INFO L124 PetriNetUnfolderBase]: 11775/18568 cut-off events. [2025-03-09 01:23:16,710 INFO L125 PetriNetUnfolderBase]: For 360525/360569 co-relation queries the response was YES. [2025-03-09 01:23:16,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157313 conditions, 18568 events. 11775/18568 cut-off events. For 360525/360569 co-relation queries the response was YES. Maximal size of possible extension queue 649. Compared 124567 event pairs, 1943 based on Foata normal form. 4/18554 useless extension candidates. Maximal degree in co-relation 155639. Up to 10856 conditions per place. [2025-03-09 01:23:16,947 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 487 selfloop transitions, 509 changer transitions 16/1024 dead transitions. [2025-03-09 01:23:16,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 1024 transitions, 26471 flow [2025-03-09 01:23:16,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-09 01:23:16,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2025-03-09 01:23:16,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 451 transitions. [2025-03-09 01:23:16,948 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6574344023323615 [2025-03-09 01:23:16,948 INFO L175 Difference]: Start difference. First operand has 237 places, 856 transitions, 21420 flow. Second operand 14 states and 451 transitions. [2025-03-09 01:23:16,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 1024 transitions, 26471 flow [2025-03-09 01:23:19,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 1024 transitions, 26202 flow, removed 130 selfloop flow, removed 2 redundant places. [2025-03-09 01:23:19,099 INFO L231 Difference]: Finished difference. Result has 254 places, 923 transitions, 24597 flow [2025-03-09 01:23:19,100 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=21167, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=856, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=444, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=24597, PETRI_PLACES=254, PETRI_TRANSITIONS=923} [2025-03-09 01:23:19,101 INFO L279 CegarLoopForPetriNet]: 48 programPoint places, 206 predicate places. [2025-03-09 01:23:19,101 INFO L471 AbstractCegarLoop]: Abstraction has has 254 places, 923 transitions, 24597 flow [2025-03-09 01:23:19,101 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 24.1) internal successors, (241), 10 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:23:19,101 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:23:19,101 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, 1, 1] [2025-03-09 01:23:19,101 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2025-03-09 01:23:19,101 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-03-09 01:23:19,101 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:23:19,102 INFO L85 PathProgramCache]: Analyzing trace with hash -511555988, now seen corresponding path program 9 times [2025-03-09 01:23:19,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:23:19,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599570349] [2025-03-09 01:23:19,102 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-09 01:23:19,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:23:19,107 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 26 statements into 3 equivalence classes. [2025-03-09 01:23:19,111 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) and asserted 23 of 26 statements. [2025-03-09 01:23:19,111 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2025-03-09 01:23:19,111 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:23:19,327 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-09 01:23:19,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:23:19,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599570349] [2025-03-09 01:23:19,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599570349] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:23:19,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:23:19,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2025-03-09 01:23:19,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500389996] [2025-03-09 01:23:19,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:23:19,328 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-09 01:23:19,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:23:19,328 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-09 01:23:19,328 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2025-03-09 01:23:19,395 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 49 [2025-03-09 01:23:19,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 923 transitions, 24597 flow. Second operand has 10 states, 10 states have (on average 24.1) internal successors, (241), 10 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:23:19,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:23:19,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 49 [2025-03-09 01:23:19,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:23:23,663 INFO L124 PetriNetUnfolderBase]: 12145/19181 cut-off events. [2025-03-09 01:23:23,663 INFO L125 PetriNetUnfolderBase]: For 428522/428566 co-relation queries the response was YES. [2025-03-09 01:23:23,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 170090 conditions, 19181 events. 12145/19181 cut-off events. For 428522/428566 co-relation queries the response was YES. Maximal size of possible extension queue 671. Compared 129029 event pairs, 1470 based on Foata normal form. 4/19167 useless extension candidates. Maximal degree in co-relation 168640. Up to 10649 conditions per place. [2025-03-09 01:23:24,099 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 479 selfloop transitions, 540 changer transitions 16/1047 dead transitions. [2025-03-09 01:23:24,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 1047 transitions, 28755 flow [2025-03-09 01:23:24,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-09 01:23:24,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-03-09 01:23:24,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 400 transitions. [2025-03-09 01:23:24,100 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6802721088435374 [2025-03-09 01:23:24,100 INFO L175 Difference]: Start difference. First operand has 254 places, 923 transitions, 24597 flow. Second operand 12 states and 400 transitions. [2025-03-09 01:23:24,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 1047 transitions, 28755 flow [2025-03-09 01:23:26,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 1047 transitions, 28158 flow, removed 237 selfloop flow, removed 4 redundant places. [2025-03-09 01:23:26,575 INFO L231 Difference]: Finished difference. Result has 266 places, 956 transitions, 26578 flow [2025-03-09 01:23:26,575 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=24152, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=923, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=506, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=407, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=26578, PETRI_PLACES=266, PETRI_TRANSITIONS=956} [2025-03-09 01:23:26,575 INFO L279 CegarLoopForPetriNet]: 48 programPoint places, 218 predicate places. [2025-03-09 01:23:26,575 INFO L471 AbstractCegarLoop]: Abstraction has has 266 places, 956 transitions, 26578 flow [2025-03-09 01:23:26,575 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 24.1) internal successors, (241), 10 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:23:26,575 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:23:26,576 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, 1, 1] [2025-03-09 01:23:26,576 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2025-03-09 01:23:26,576 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-03-09 01:23:26,576 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:23:26,576 INFO L85 PathProgramCache]: Analyzing trace with hash 653146808, now seen corresponding path program 1 times [2025-03-09 01:23:26,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:23:26,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721416241] [2025-03-09 01:23:26,576 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:23:26,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:23:26,580 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-03-09 01:23:26,587 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-03-09 01:23:26,587 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:23:26,587 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:23:26,778 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-09 01:23:26,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:23:26,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721416241] [2025-03-09 01:23:26,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721416241] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:23:26,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:23:26,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-03-09 01:23:26,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380527727] [2025-03-09 01:23:26,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:23:26,778 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-09 01:23:26,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:23:26,778 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-09 01:23:26,779 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2025-03-09 01:23:26,975 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 49 [2025-03-09 01:23:26,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 956 transitions, 26578 flow. Second operand has 10 states, 10 states have (on average 24.1) internal successors, (241), 10 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:23:26,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:23:26,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 49 [2025-03-09 01:23:26,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:23:32,303 INFO L124 PetriNetUnfolderBase]: 13789/21773 cut-off events. [2025-03-09 01:23:32,303 INFO L125 PetriNetUnfolderBase]: For 534662/534706 co-relation queries the response was YES. [2025-03-09 01:23:32,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 199507 conditions, 21773 events. 13789/21773 cut-off events. For 534662/534706 co-relation queries the response was YES. Maximal size of possible extension queue 767. Compared 150813 event pairs, 2637 based on Foata normal form. 4/21755 useless extension candidates. Maximal degree in co-relation 198036. Up to 17267 conditions per place. [2025-03-09 01:23:32,632 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 987 selfloop transitions, 205 changer transitions 4/1208 dead transitions. [2025-03-09 01:23:32,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 1208 transitions, 34854 flow [2025-03-09 01:23:32,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-09 01:23:32,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-09 01:23:32,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 334 transitions. [2025-03-09 01:23:32,634 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6816326530612244 [2025-03-09 01:23:32,634 INFO L175 Difference]: Start difference. First operand has 266 places, 956 transitions, 26578 flow. Second operand 10 states and 334 transitions. [2025-03-09 01:23:32,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 1208 transitions, 34854 flow [2025-03-09 01:23:35,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 1208 transitions, 34422 flow, removed 88 selfloop flow, removed 5 redundant places. [2025-03-09 01:23:35,921 INFO L231 Difference]: Finished difference. Result has 276 places, 1078 transitions, 30956 flow [2025-03-09 01:23:35,922 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=26201, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=956, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=759, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=30956, PETRI_PLACES=276, PETRI_TRANSITIONS=1078} [2025-03-09 01:23:35,922 INFO L279 CegarLoopForPetriNet]: 48 programPoint places, 228 predicate places. [2025-03-09 01:23:35,922 INFO L471 AbstractCegarLoop]: Abstraction has has 276 places, 1078 transitions, 30956 flow [2025-03-09 01:23:35,923 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 24.1) internal successors, (241), 10 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:23:35,923 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:23:35,923 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, 1, 1] [2025-03-09 01:23:35,923 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2025-03-09 01:23:35,923 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-03-09 01:23:35,923 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:23:35,923 INFO L85 PathProgramCache]: Analyzing trace with hash -1822774834, now seen corresponding path program 2 times [2025-03-09 01:23:35,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:23:35,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628881685] [2025-03-09 01:23:35,923 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-09 01:23:35,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:23:35,928 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 26 statements into 2 equivalence classes. [2025-03-09 01:23:35,932 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 23 of 26 statements. [2025-03-09 01:23:35,932 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-09 01:23:35,932 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:23:36,114 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-09 01:23:36,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:23:36,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628881685] [2025-03-09 01:23:36,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628881685] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:23:36,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:23:36,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2025-03-09 01:23:36,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842378000] [2025-03-09 01:23:36,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:23:36,115 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-09 01:23:36,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:23:36,115 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-09 01:23:36,115 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2025-03-09 01:23:36,185 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 49 [2025-03-09 01:23:36,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 1078 transitions, 30956 flow. Second operand has 10 states, 10 states have (on average 24.1) internal successors, (241), 10 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:23:36,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:23:36,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 49 [2025-03-09 01:23:36,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:23:41,912 INFO L124 PetriNetUnfolderBase]: 14071/22202 cut-off events. [2025-03-09 01:23:41,913 INFO L125 PetriNetUnfolderBase]: For 554187/554231 co-relation queries the response was YES. [2025-03-09 01:23:42,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 205750 conditions, 22202 events. 14071/22202 cut-off events. For 554187/554231 co-relation queries the response was YES. Maximal size of possible extension queue 783. Compared 153281 event pairs, 1738 based on Foata normal form. 4/22192 useless extension candidates. Maximal degree in co-relation 204254. Up to 12671 conditions per place. [2025-03-09 01:23:42,195 INFO L140 encePairwiseOnDemand]: 35/49 looper letters, 574 selfloop transitions, 566 changer transitions 16/1168 dead transitions. [2025-03-09 01:23:42,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 1168 transitions, 34403 flow [2025-03-09 01:23:42,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-09 01:23:42,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-03-09 01:23:42,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 371 transitions. [2025-03-09 01:23:42,196 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6883116883116883 [2025-03-09 01:23:42,196 INFO L175 Difference]: Start difference. First operand has 276 places, 1078 transitions, 30956 flow. Second operand 11 states and 371 transitions. [2025-03-09 01:23:42,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 1168 transitions, 34403 flow [2025-03-09 01:23:45,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 1168 transitions, 34052 flow, removed 167 selfloop flow, removed 2 redundant places. [2025-03-09 01:23:45,555 INFO L231 Difference]: Finished difference. Result has 287 places, 1080 transitions, 32161 flow [2025-03-09 01:23:45,555 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=30625, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1078, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=557, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=517, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=32161, PETRI_PLACES=287, PETRI_TRANSITIONS=1080} [2025-03-09 01:23:45,555 INFO L279 CegarLoopForPetriNet]: 48 programPoint places, 239 predicate places. [2025-03-09 01:23:45,555 INFO L471 AbstractCegarLoop]: Abstraction has has 287 places, 1080 transitions, 32161 flow [2025-03-09 01:23:45,556 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 24.1) internal successors, (241), 10 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:23:45,556 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:23:45,556 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, 1, 1] [2025-03-09 01:23:45,556 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2025-03-09 01:23:45,556 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2025-03-09 01:23:45,556 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:23:45,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1767566812, now seen corresponding path program 1 times [2025-03-09 01:23:45,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:23:45,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250716057] [2025-03-09 01:23:45,556 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:23:45,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:23:45,561 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-03-09 01:23:45,567 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-03-09 01:23:45,567 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:23:45,567 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:23:45,805 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-09 01:23:45,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:23:45,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250716057] [2025-03-09 01:23:45,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250716057] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 01:23:45,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094215686] [2025-03-09 01:23:45,805 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:23:45,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:23:45,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:23:45,807 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:23:45,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-09 01:23:45,848 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-03-09 01:23:45,864 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-03-09 01:23:45,864 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:23:45,864 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:23:45,865 INFO L256 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 32 conjuncts are in the unsatisfiable core [2025-03-09 01:23:45,866 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:23:45,880 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 1 [2025-03-09 01:23:46,020 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-09 01:23:46,038 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-09 01:23:46,038 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 01:23:46,065 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-09 01:23:46,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094215686] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-09 01:23:46,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-09 01:23:46,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11, 9] total 18 [2025-03-09 01:23:46,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702790095] [2025-03-09 01:23:46,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:23:46,066 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-09 01:23:46,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:23:46,066 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-09 01:23:46,066 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2025-03-09 01:23:46,196 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 49 [2025-03-09 01:23:46,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 1080 transitions, 32161 flow. Second operand has 8 states, 8 states have (on average 24.625) internal successors, (197), 8 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:23:46,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:23:46,196 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 49 [2025-03-09 01:23:46,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:23:52,178 INFO L124 PetriNetUnfolderBase]: 14405/22778 cut-off events. [2025-03-09 01:23:52,178 INFO L125 PetriNetUnfolderBase]: For 616788/616832 co-relation queries the response was YES. [2025-03-09 01:23:52,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 214977 conditions, 22778 events. 14405/22778 cut-off events. For 616788/616832 co-relation queries the response was YES. Maximal size of possible extension queue 806. Compared 158704 event pairs, 2497 based on Foata normal form. 4/22768 useless extension candidates. Maximal degree in co-relation 212696. Up to 14612 conditions per place. [2025-03-09 01:23:52,587 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 701 selfloop transitions, 460 changer transitions 4/1177 dead transitions. [2025-03-09 01:23:52,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 1177 transitions, 35828 flow [2025-03-09 01:23:52,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-09 01:23:52,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-09 01:23:52,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 338 transitions. [2025-03-09 01:23:52,588 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.689795918367347 [2025-03-09 01:23:52,588 INFO L175 Difference]: Start difference. First operand has 287 places, 1080 transitions, 32161 flow. Second operand 10 states and 338 transitions. [2025-03-09 01:23:52,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 1177 transitions, 35828 flow