./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/pthread/fib_unsafe-10.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 8fc3dc66 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/pthread/fib_unsafe-10.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 89d9c43e2f37f1bac8114d01260f8a993f33530b50231d4afed1f3cf3859d385 --- Real Ultimate output --- This is Ultimate 0.3.0-?-8fc3dc6-m [2025-03-17 13:57:50,237 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-17 13:57:50,294 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-03-17 13:57:50,300 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-17 13:57:50,303 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-17 13:57:50,321 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-17 13:57:50,322 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-17 13:57:50,323 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-17 13:57:50,323 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-17 13:57:50,323 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-17 13:57:50,323 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-17 13:57:50,324 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-17 13:57:50,324 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-17 13:57:50,324 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-17 13:57:50,324 INFO L153 SettingsManager]: * Use SBE=true [2025-03-17 13:57:50,324 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-17 13:57:50,325 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-17 13:57:50,325 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-17 13:57:50,325 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-17 13:57:50,325 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-17 13:57:50,325 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-03-17 13:57:50,325 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-03-17 13:57:50,325 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-03-17 13:57:50,325 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-17 13:57:50,325 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-03-17 13:57:50,325 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-03-17 13:57:50,325 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-17 13:57:50,326 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-17 13:57:50,326 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-17 13:57:50,326 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-17 13:57:50,326 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-17 13:57:50,326 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-17 13:57:50,326 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-17 13:57:50,326 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 13:57:50,327 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-17 13:57:50,327 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-17 13:57:50,327 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-17 13:57:50,327 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-17 13:57:50,327 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-17 13:57:50,327 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-17 13:57:50,327 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-17 13:57:50,327 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-17 13:57:50,327 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 -> 89d9c43e2f37f1bac8114d01260f8a993f33530b50231d4afed1f3cf3859d385 [2025-03-17 13:57:50,570 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-17 13:57:50,575 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-17 13:57:50,577 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-17 13:57:50,577 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-17 13:57:50,578 INFO L274 PluginConnector]: CDTParser initialized [2025-03-17 13:57:50,578 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread/fib_unsafe-10.i [2025-03-17 13:57:51,663 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f80fd7ad9/681a045a841d414692ad79bc8f354b70/FLAG8f74637b9 [2025-03-17 13:57:51,912 INFO L384 CDTParser]: Found 1 translation units. [2025-03-17 13:57:51,913 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/fib_unsafe-10.i [2025-03-17 13:57:51,928 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f80fd7ad9/681a045a841d414692ad79bc8f354b70/FLAG8f74637b9 [2025-03-17 13:57:52,238 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f80fd7ad9/681a045a841d414692ad79bc8f354b70 [2025-03-17 13:57:52,240 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-17 13:57:52,241 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-17 13:57:52,241 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-17 13:57:52,241 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-17 13:57:52,244 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-17 13:57:52,245 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 01:57:52" (1/1) ... [2025-03-17 13:57:52,245 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1139a99b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 01:57:52, skipping insertion in model container [2025-03-17 13:57:52,245 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 01:57:52" (1/1) ... [2025-03-17 13:57:52,266 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-17 13:57:52,446 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 13:57:52,452 INFO L200 MainTranslator]: Completed pre-run [2025-03-17 13:57:52,478 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 13:57:52,501 INFO L204 MainTranslator]: Completed translation [2025-03-17 13:57:52,501 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 01:57:52 WrapperNode [2025-03-17 13:57:52,501 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-17 13:57:52,502 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-17 13:57:52,502 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-17 13:57:52,502 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-17 13:57:52,506 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 01:57:52" (1/1) ... [2025-03-17 13:57:52,514 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 01:57:52" (1/1) ... [2025-03-17 13:57:52,526 INFO L138 Inliner]: procedures = 164, calls = 21, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 65 [2025-03-17 13:57:52,527 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-17 13:57:52,527 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-17 13:57:52,527 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-17 13:57:52,527 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-17 13:57:52,532 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 01:57:52" (1/1) ... [2025-03-17 13:57:52,532 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 01:57:52" (1/1) ... [2025-03-17 13:57:52,533 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 01:57:52" (1/1) ... [2025-03-17 13:57:52,540 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2025-03-17 13:57:52,540 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 01:57:52" (1/1) ... [2025-03-17 13:57:52,541 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 01:57:52" (1/1) ... [2025-03-17 13:57:52,543 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 01:57:52" (1/1) ... [2025-03-17 13:57:52,544 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 01:57:52" (1/1) ... [2025-03-17 13:57:52,545 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 01:57:52" (1/1) ... [2025-03-17 13:57:52,545 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 01:57:52" (1/1) ... [2025-03-17 13:57:52,546 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-17 13:57:52,547 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-17 13:57:52,547 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-17 13:57:52,547 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-17 13:57:52,547 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 01:57:52" (1/1) ... [2025-03-17 13:57:52,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 13:57:52,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 13:57:52,578 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-03-17 13:57:52,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-03-17 13:57:52,597 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2025-03-17 13:57:52,597 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2025-03-17 13:57:52,597 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2025-03-17 13:57:52,597 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2025-03-17 13:57:52,597 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-03-17 13:57:52,597 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-17 13:57:52,598 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-17 13:57:52,598 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-03-17 13:57:52,598 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-17 13:57:52,598 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-17 13:57:52,598 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-03-17 13:57:52,681 INFO L256 CfgBuilder]: Building ICFG [2025-03-17 13:57:52,682 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-17 13:57:52,816 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-17 13:57:52,816 INFO L307 CfgBuilder]: Performing block encoding [2025-03-17 13:57:52,895 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-17 13:57:52,895 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-17 13:57:52,895 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 01:57:52 BoogieIcfgContainer [2025-03-17 13:57:52,895 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-17 13:57:52,897 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-17 13:57:52,897 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-17 13:57:52,900 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-17 13:57:52,900 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 01:57:52" (1/3) ... [2025-03-17 13:57:52,901 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28baf692 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 01:57:52, skipping insertion in model container [2025-03-17 13:57:52,902 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 01:57:52" (2/3) ... [2025-03-17 13:57:52,902 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28baf692 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 01:57:52, skipping insertion in model container [2025-03-17 13:57:52,902 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 01:57:52" (3/3) ... [2025-03-17 13:57:52,903 INFO L128 eAbstractionObserver]: Analyzing ICFG fib_unsafe-10.i [2025-03-17 13:57:52,913 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-17 13:57:52,915 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG fib_unsafe-10.i that has 3 procedures, 30 locations, 1 initial locations, 3 loop locations, and 2 error locations. [2025-03-17 13:57:52,915 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-17 13:57:52,945 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-03-17 13:57:52,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 36 places, 34 transitions, 76 flow [2025-03-17 13:57:52,990 INFO L124 PetriNetUnfolderBase]: 5/32 cut-off events. [2025-03-17 13:57:52,993 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-03-17 13:57:52,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39 conditions, 32 events. 5/32 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 43 event pairs, 0 based on Foata normal form. 0/25 useless extension candidates. Maximal degree in co-relation 29. Up to 2 conditions per place. [2025-03-17 13:57:52,996 INFO L82 GeneralOperation]: Start removeDead. Operand has 36 places, 34 transitions, 76 flow [2025-03-17 13:57:52,998 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 34 places, 32 transitions, 70 flow [2025-03-17 13:57:53,003 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-17 13:57:53,010 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;@6e36b380, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-17 13:57:53,010 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2025-03-17 13:57:53,019 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-17 13:57:53,019 INFO L124 PetriNetUnfolderBase]: 5/29 cut-off events. [2025-03-17 13:57:53,019 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-03-17 13:57:53,019 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 13:57:53,020 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 13:57:53,020 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 13:57:53,025 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 13:57:53,025 INFO L85 PathProgramCache]: Analyzing trace with hash -782702448, now seen corresponding path program 1 times [2025-03-17 13:57:53,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 13:57:53,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324811707] [2025-03-17 13:57:53,032 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 13:57:53,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 13:57:53,094 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-03-17 13:57:53,112 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-03-17 13:57:53,114 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 13:57:53,114 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 13:57:53,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 13:57:53,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 13:57:53,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324811707] [2025-03-17 13:57:53,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324811707] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 13:57:53,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 13:57:53,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-17 13:57:53,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674077760] [2025-03-17 13:57:53,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 13:57:53,225 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-17 13:57:53,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 13:57:53,245 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-17 13:57:53,246 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 13:57:53,247 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2025-03-17 13:57:53,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 32 transitions, 70 flow. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 13:57:53,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 13:57:53,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2025-03-17 13:57:53,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 13:57:53,363 INFO L124 PetriNetUnfolderBase]: 297/523 cut-off events. [2025-03-17 13:57:53,363 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-03-17 13:57:53,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 990 conditions, 523 events. 297/523 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2146 event pairs, 39 based on Foata normal form. 32/534 useless extension candidates. Maximal degree in co-relation 974. Up to 353 conditions per place. [2025-03-17 13:57:53,369 INFO L140 encePairwiseOnDemand]: 29/34 looper letters, 29 selfloop transitions, 2 changer transitions 1/38 dead transitions. [2025-03-17 13:57:53,369 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 38 transitions, 146 flow [2025-03-17 13:57:53,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 13:57:53,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-17 13:57:53,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 59 transitions. [2025-03-17 13:57:53,380 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5784313725490197 [2025-03-17 13:57:53,381 INFO L175 Difference]: Start difference. First operand has 34 places, 32 transitions, 70 flow. Second operand 3 states and 59 transitions. [2025-03-17 13:57:53,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 38 transitions, 146 flow [2025-03-17 13:57:53,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 38 transitions, 144 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-17 13:57:53,387 INFO L231 Difference]: Finished difference. Result has 34 places, 29 transitions, 72 flow [2025-03-17 13:57:53,388 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=72, PETRI_PLACES=34, PETRI_TRANSITIONS=29} [2025-03-17 13:57:53,391 INFO L279 CegarLoopForPetriNet]: 34 programPoint places, 0 predicate places. [2025-03-17 13:57:53,391 INFO L471 AbstractCegarLoop]: Abstraction has has 34 places, 29 transitions, 72 flow [2025-03-17 13:57:53,391 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 13:57:53,391 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 13:57:53,391 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 13:57:53,391 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-17 13:57:53,392 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 13:57:53,392 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 13:57:53,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1732255421, now seen corresponding path program 1 times [2025-03-17 13:57:53,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 13:57:53,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082371993] [2025-03-17 13:57:53,395 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 13:57:53,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 13:57:53,415 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-03-17 13:57:53,428 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-03-17 13:57:53,429 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 13:57:53,429 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 13:57:53,479 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 13:57:53,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 13:57:53,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082371993] [2025-03-17 13:57:53,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082371993] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 13:57:53,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759857936] [2025-03-17 13:57:53,479 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 13:57:53,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 13:57:53,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 13:57:53,482 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 13:57:53,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-17 13:57:53,529 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-03-17 13:57:53,542 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-03-17 13:57:53,542 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 13:57:53,542 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 13:57:53,543 INFO L256 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 2 conjuncts are in the unsatisfiable core [2025-03-17 13:57:53,546 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 13:57:53,573 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 13:57:53,573 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 13:57:53,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759857936] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 13:57:53,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-17 13:57:53,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [4] total 5 [2025-03-17 13:57:53,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989803123] [2025-03-17 13:57:53,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 13:57:53,575 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-17 13:57:53,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 13:57:53,575 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-17 13:57:53,575 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-17 13:57:53,575 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2025-03-17 13:57:53,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 29 transitions, 72 flow. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 13:57:53,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 13:57:53,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2025-03-17 13:57:53,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 13:57:53,643 INFO L124 PetriNetUnfolderBase]: 265/459 cut-off events. [2025-03-17 13:57:53,643 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2025-03-17 13:57:53,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 943 conditions, 459 events. 265/459 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1777 event pairs, 183 based on Foata normal form. 16/454 useless extension candidates. Maximal degree in co-relation 926. Up to 405 conditions per place. [2025-03-17 13:57:53,645 INFO L140 encePairwiseOnDemand]: 32/34 looper letters, 21 selfloop transitions, 1 changer transitions 1/28 dead transitions. [2025-03-17 13:57:53,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 28 transitions, 116 flow [2025-03-17 13:57:53,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 13:57:53,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-17 13:57:53,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 44 transitions. [2025-03-17 13:57:53,647 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.43137254901960786 [2025-03-17 13:57:53,647 INFO L175 Difference]: Start difference. First operand has 34 places, 29 transitions, 72 flow. Second operand 3 states and 44 transitions. [2025-03-17 13:57:53,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 28 transitions, 116 flow [2025-03-17 13:57:53,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 28 transitions, 114 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-17 13:57:53,648 INFO L231 Difference]: Finished difference. Result has 33 places, 27 transitions, 68 flow [2025-03-17 13:57:53,648 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=68, PETRI_PLACES=33, PETRI_TRANSITIONS=27} [2025-03-17 13:57:53,648 INFO L279 CegarLoopForPetriNet]: 34 programPoint places, -1 predicate places. [2025-03-17 13:57:53,648 INFO L471 AbstractCegarLoop]: Abstraction has has 33 places, 27 transitions, 68 flow [2025-03-17 13:57:53,648 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 13:57:53,649 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 13:57:53,649 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 13:57:53,655 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-17 13:57:53,849 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 13:57:53,850 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 13:57:53,851 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 13:57:53,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1732256997, now seen corresponding path program 1 times [2025-03-17 13:57:53,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 13:57:53,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21279924] [2025-03-17 13:57:53,853 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 13:57:53,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 13:57:53,860 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-03-17 13:57:53,869 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-03-17 13:57:53,869 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 13:57:53,869 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 13:57:53,928 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 13:57:53,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 13:57:53,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21279924] [2025-03-17 13:57:53,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21279924] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 13:57:53,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323568560] [2025-03-17 13:57:53,929 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 13:57:53,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 13:57:53,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 13:57:53,931 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 13:57:53,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-17 13:57:53,974 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-03-17 13:57:53,989 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-03-17 13:57:53,990 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 13:57:53,990 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 13:57:53,991 INFO L256 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-03-17 13:57:53,992 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 13:57:54,017 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 13:57:54,017 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 13:57:54,038 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 13:57:54,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323568560] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 13:57:54,038 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 13:57:54,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2025-03-17 13:57:54,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595624613] [2025-03-17 13:57:54,038 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 13:57:54,039 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-17 13:57:54,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 13:57:54,039 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-17 13:57:54,039 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2025-03-17 13:57:54,039 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2025-03-17 13:57:54,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 27 transitions, 68 flow. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 13:57:54,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 13:57:54,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2025-03-17 13:57:54,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 13:57:54,146 INFO L124 PetriNetUnfolderBase]: 329/555 cut-off events. [2025-03-17 13:57:54,146 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2025-03-17 13:57:54,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1168 conditions, 555 events. 329/555 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 2089 event pairs, 39 based on Foata normal form. 0/534 useless extension candidates. Maximal degree in co-relation 1160. Up to 257 conditions per place. [2025-03-17 13:57:54,150 INFO L140 encePairwiseOnDemand]: 31/34 looper letters, 52 selfloop transitions, 5 changer transitions 0/62 dead transitions. [2025-03-17 13:57:54,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 62 transitions, 258 flow [2025-03-17 13:57:54,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-17 13:57:54,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-17 13:57:54,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2025-03-17 13:57:54,153 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5294117647058824 [2025-03-17 13:57:54,153 INFO L175 Difference]: Start difference. First operand has 33 places, 27 transitions, 68 flow. Second operand 6 states and 108 transitions. [2025-03-17 13:57:54,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 62 transitions, 258 flow [2025-03-17 13:57:54,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 62 transitions, 257 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-17 13:57:54,155 INFO L231 Difference]: Finished difference. Result has 39 places, 30 transitions, 103 flow [2025-03-17 13:57:54,156 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=67, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=103, PETRI_PLACES=39, PETRI_TRANSITIONS=30} [2025-03-17 13:57:54,156 INFO L279 CegarLoopForPetriNet]: 34 programPoint places, 5 predicate places. [2025-03-17 13:57:54,157 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 30 transitions, 103 flow [2025-03-17 13:57:54,157 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 13:57:54,157 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 13:57:54,157 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 13:57:54,164 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-17 13:57:54,362 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,SelfDestructingSolverStorable2 [2025-03-17 13:57:54,362 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 13:57:54,362 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 13:57:54,363 INFO L85 PathProgramCache]: Analyzing trace with hash -1400139272, now seen corresponding path program 2 times [2025-03-17 13:57:54,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 13:57:54,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341782527] [2025-03-17 13:57:54,363 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 13:57:54,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 13:57:54,369 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-03-17 13:57:54,385 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-03-17 13:57:54,385 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 13:57:54,385 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 13:57:54,470 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 13:57:54,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 13:57:54,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341782527] [2025-03-17 13:57:54,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341782527] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 13:57:54,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333542160] [2025-03-17 13:57:54,471 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 13:57:54,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 13:57:54,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 13:57:54,472 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 13:57:54,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-17 13:57:54,507 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-03-17 13:57:54,520 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-03-17 13:57:54,520 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 13:57:54,520 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 13:57:54,521 INFO L256 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-17 13:57:54,522 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 13:57:54,535 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 13:57:54,535 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 13:57:54,579 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 13:57:54,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333542160] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 13:57:54,579 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 13:57:54,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2025-03-17 13:57:54,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751307228] [2025-03-17 13:57:54,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 13:57:54,580 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-17 13:57:54,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 13:57:54,580 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-17 13:57:54,580 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2025-03-17 13:57:54,580 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2025-03-17 13:57:54,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 30 transitions, 103 flow. Second operand has 13 states, 13 states have (on average 9.846153846153847) internal successors, (128), 13 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 13:57:54,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 13:57:54,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2025-03-17 13:57:54,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 13:57:54,740 INFO L124 PetriNetUnfolderBase]: 521/843 cut-off events. [2025-03-17 13:57:54,740 INFO L125 PetriNetUnfolderBase]: For 364/364 co-relation queries the response was YES. [2025-03-17 13:57:54,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2116 conditions, 843 events. 521/843 cut-off events. For 364/364 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 3087 event pairs, 39 based on Foata normal form. 96/934 useless extension candidates. Maximal degree in co-relation 2104. Up to 257 conditions per place. [2025-03-17 13:57:54,744 INFO L140 encePairwiseOnDemand]: 31/34 looper letters, 100 selfloop transitions, 11 changer transitions 0/116 dead transitions. [2025-03-17 13:57:54,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 116 transitions, 521 flow [2025-03-17 13:57:54,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-17 13:57:54,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-03-17 13:57:54,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 213 transitions. [2025-03-17 13:57:54,745 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5220588235294118 [2025-03-17 13:57:54,745 INFO L175 Difference]: Start difference. First operand has 39 places, 30 transitions, 103 flow. Second operand 12 states and 213 transitions. [2025-03-17 13:57:54,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 116 transitions, 521 flow [2025-03-17 13:57:54,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 116 transitions, 507 flow, removed 6 selfloop flow, removed 1 redundant places. [2025-03-17 13:57:54,748 INFO L231 Difference]: Finished difference. Result has 55 places, 36 transitions, 173 flow [2025-03-17 13:57:54,748 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=89, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=173, PETRI_PLACES=55, PETRI_TRANSITIONS=36} [2025-03-17 13:57:54,749 INFO L279 CegarLoopForPetriNet]: 34 programPoint places, 21 predicate places. [2025-03-17 13:57:54,749 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 36 transitions, 173 flow [2025-03-17 13:57:54,749 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.846153846153847) internal successors, (128), 13 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 13:57:54,749 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 13:57:54,749 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 13:57:54,755 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-17 13:57:54,954 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 13:57:54,954 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 13:57:54,955 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 13:57:54,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1716632280, now seen corresponding path program 3 times [2025-03-17 13:57:54,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 13:57:54,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364091011] [2025-03-17 13:57:54,956 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 13:57:54,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 13:57:54,961 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 24 statements into 6 equivalence classes. [2025-03-17 13:57:54,983 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 24 of 24 statements. [2025-03-17 13:57:54,983 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-03-17 13:57:54,984 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 13:57:55,115 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 13:57:55,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 13:57:55,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364091011] [2025-03-17 13:57:55,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364091011] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 13:57:55,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70260789] [2025-03-17 13:57:55,115 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 13:57:55,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 13:57:55,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 13:57:55,117 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 13:57:55,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-17 13:57:55,154 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 24 statements into 6 equivalence classes. [2025-03-17 13:57:55,175 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 24 of 24 statements. [2025-03-17 13:57:55,175 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-03-17 13:57:55,175 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 13:57:55,176 INFO L256 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-17 13:57:55,177 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 13:57:55,203 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 13:57:55,204 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 13:57:55,394 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 13:57:55,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70260789] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 13:57:55,394 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 13:57:55,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2025-03-17 13:57:55,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547589443] [2025-03-17 13:57:55,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 13:57:55,394 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-03-17 13:57:55,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 13:57:55,395 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-03-17 13:57:55,395 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2025-03-17 13:57:55,395 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2025-03-17 13:57:55,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 36 transitions, 173 flow. Second operand has 25 states, 25 states have (on average 9.44) internal successors, (236), 25 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 13:57:55,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 13:57:55,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2025-03-17 13:57:55,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 13:57:55,751 INFO L124 PetriNetUnfolderBase]: 905/1419 cut-off events. [2025-03-17 13:57:55,751 INFO L125 PetriNetUnfolderBase]: For 7468/7468 co-relation queries the response was YES. [2025-03-17 13:57:55,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4123 conditions, 1419 events. 905/1419 cut-off events. For 7468/7468 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 5226 event pairs, 39 based on Foata normal form. 192/1606 useless extension candidates. Maximal degree in co-relation 4104. Up to 337 conditions per place. [2025-03-17 13:57:55,763 INFO L140 encePairwiseOnDemand]: 31/34 looper letters, 196 selfloop transitions, 23 changer transitions 0/224 dead transitions. [2025-03-17 13:57:55,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 224 transitions, 1059 flow [2025-03-17 13:57:55,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-03-17 13:57:55,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2025-03-17 13:57:55,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 423 transitions. [2025-03-17 13:57:55,768 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5183823529411765 [2025-03-17 13:57:55,768 INFO L175 Difference]: Start difference. First operand has 55 places, 36 transitions, 173 flow. Second operand 24 states and 423 transitions. [2025-03-17 13:57:55,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 224 transitions, 1059 flow [2025-03-17 13:57:55,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 224 transitions, 987 flow, removed 31 selfloop flow, removed 5 redundant places. [2025-03-17 13:57:55,781 INFO L231 Difference]: Finished difference. Result has 85 places, 48 transitions, 293 flow [2025-03-17 13:57:55,782 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=293, PETRI_PLACES=85, PETRI_TRANSITIONS=48} [2025-03-17 13:57:55,782 INFO L279 CegarLoopForPetriNet]: 34 programPoint places, 51 predicate places. [2025-03-17 13:57:55,783 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 48 transitions, 293 flow [2025-03-17 13:57:55,784 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 9.44) internal successors, (236), 25 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 13:57:55,784 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 13:57:55,784 INFO L206 CegarLoopForPetriNet]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 13:57:55,795 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-03-17 13:57:55,984 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 13:57:55,985 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 13:57:55,985 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 13:57:55,986 INFO L85 PathProgramCache]: Analyzing trace with hash -490892136, now seen corresponding path program 4 times [2025-03-17 13:57:55,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 13:57:55,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051325468] [2025-03-17 13:57:55,986 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 13:57:55,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 13:57:55,995 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 36 statements into 2 equivalence classes. [2025-03-17 13:57:56,044 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 36 of 36 statements. [2025-03-17 13:57:56,044 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 13:57:56,044 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 13:57:57,416 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 13:57:57,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 13:57:57,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051325468] [2025-03-17 13:57:57,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051325468] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 13:57:57,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224165122] [2025-03-17 13:57:57,417 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 13:57:57,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 13:57:57,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 13:57:57,419 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 13:57:57,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-17 13:57:57,464 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 36 statements into 2 equivalence classes. [2025-03-17 13:57:57,492 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 36 of 36 statements. [2025-03-17 13:57:57,492 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 13:57:57,493 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 13:57:57,494 INFO L256 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 77 conjuncts are in the unsatisfiable core [2025-03-17 13:57:57,498 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 13:57:58,826 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 210 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 13:57:58,827 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 13:58:00,273 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 13:58:00,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224165122] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 13:58:00,273 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 13:58:00,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 85 [2025-03-17 13:58:00,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263867544] [2025-03-17 13:58:00,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 13:58:00,274 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2025-03-17 13:58:00,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 13:58:00,275 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2025-03-17 13:58:00,277 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1010, Invalid=6300, Unknown=0, NotChecked=0, Total=7310 [2025-03-17 13:58:00,279 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2025-03-17 13:58:00,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 48 transitions, 293 flow. Second operand has 86 states, 86 states have (on average 8.186046511627907) internal successors, (704), 86 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 13:58:00,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 13:58:00,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2025-03-17 13:58:00,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 13:58:31,743 INFO L124 PetriNetUnfolderBase]: 31762/52483 cut-off events. [2025-03-17 13:58:31,744 INFO L125 PetriNetUnfolderBase]: For 195751/195751 co-relation queries the response was YES. [2025-03-17 13:58:31,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148939 conditions, 52483 events. 31762/52483 cut-off events. For 195751/195751 co-relation queries the response was YES. Maximal size of possible extension queue 558. Compared 362138 event pairs, 104 based on Foata normal form. 0/51987 useless extension candidates. Maximal degree in co-relation 148908. Up to 7717 conditions per place. [2025-03-17 13:58:32,012 INFO L140 encePairwiseOnDemand]: 24/34 looper letters, 869 selfloop transitions, 1254 changer transitions 1053/3180 dead transitions. [2025-03-17 13:58:32,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 3180 transitions, 21998 flow [2025-03-17 13:58:32,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 262 states. [2025-03-17 13:58:32,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2025-03-17 13:58:32,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 4041 transitions. [2025-03-17 13:58:32,023 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45363718006286485 [2025-03-17 13:58:32,023 INFO L175 Difference]: Start difference. First operand has 85 places, 48 transitions, 293 flow. Second operand 262 states and 4041 transitions. [2025-03-17 13:58:32,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 3180 transitions, 21998 flow [2025-03-17 13:58:32,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 3180 transitions, 17336 flow, removed 1850 selfloop flow, removed 11 redundant places. [2025-03-17 13:58:32,231 INFO L231 Difference]: Finished difference. Result has 437 places, 1387 transitions, 8389 flow [2025-03-17 13:58:32,232 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=197, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=262, PETRI_FLOW=8389, PETRI_PLACES=437, PETRI_TRANSITIONS=1387} [2025-03-17 13:58:32,232 INFO L279 CegarLoopForPetriNet]: 34 programPoint places, 403 predicate places. [2025-03-17 13:58:32,232 INFO L471 AbstractCegarLoop]: Abstraction has has 437 places, 1387 transitions, 8389 flow [2025-03-17 13:58:32,234 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 8.186046511627907) internal successors, (704), 86 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 13:58:32,234 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 13:58:32,234 INFO L206 CegarLoopForPetriNet]: trace histogram [22, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 13:58:32,241 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-03-17 13:58:32,438 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 13:58:32,439 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 13:58:32,439 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 13:58:32,439 INFO L85 PathProgramCache]: Analyzing trace with hash -684104612, now seen corresponding path program 1 times [2025-03-17 13:58:32,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 13:58:32,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42100314] [2025-03-17 13:58:32,439 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 13:58:32,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 13:58:32,448 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 42 statements into 1 equivalence classes. [2025-03-17 13:58:32,468 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 42 of 42 statements. [2025-03-17 13:58:32,472 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 13:58:32,472 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 13:58:33,745 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 255 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 13:58:33,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 13:58:33,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42100314] [2025-03-17 13:58:33,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42100314] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 13:58:33,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765349145] [2025-03-17 13:58:33,745 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 13:58:33,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 13:58:33,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 13:58:33,747 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 13:58:33,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-17 13:58:33,785 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 42 statements into 1 equivalence classes. [2025-03-17 13:58:33,812 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 42 of 42 statements. [2025-03-17 13:58:33,812 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 13:58:33,812 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 13:58:33,813 INFO L256 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 79 conjuncts are in the unsatisfiable core [2025-03-17 13:58:33,816 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 13:58:34,989 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 210 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 13:58:34,989 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 13:58:36,385 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 255 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 13:58:36,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765349145] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 13:58:36,385 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 13:58:36,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 91 [2025-03-17 13:58:36,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335610278] [2025-03-17 13:58:36,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 13:58:36,385 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2025-03-17 13:58:36,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 13:58:36,387 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2025-03-17 13:58:36,390 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1092, Invalid=7280, Unknown=0, NotChecked=0, Total=8372 [2025-03-17 13:58:36,391 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2025-03-17 13:58:36,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 1387 transitions, 8389 flow. Second operand has 92 states, 92 states have (on average 8.23913043478261) internal successors, (758), 92 states have internal predecessors, (758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 13:58:36,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 13:58:36,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2025-03-17 13:58:36,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand