./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/pthread/fib_safe-6.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version c7c6ca5d Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/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_1.5.800.v20200727-1323.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_safe-6.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 ca933e9c322081d61da01652cda9ceed61707699c680fd4ef3d92d3ccd39b362 --- Real Ultimate output --- This is Ultimate 0.2.5-?-c7c6ca5-m [2024-11-09 10:19:49,275 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 10:19:49,375 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-09 10:19:49,382 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 10:19:49,383 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 10:19:49,411 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 10:19:49,411 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 10:19:49,412 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 10:19:49,412 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-09 10:19:49,413 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-09 10:19:49,413 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 10:19:49,413 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 10:19:49,414 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-09 10:19:49,414 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-09 10:19:49,414 INFO L153 SettingsManager]: * Use SBE=true [2024-11-09 10:19:49,415 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 10:19:49,427 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 10:19:49,427 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 10:19:49,427 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 10:19:49,428 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 10:19:49,428 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-09 10:19:49,428 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-09 10:19:49,429 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-09 10:19:49,429 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 10:19:49,429 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-09 10:19:49,429 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 10:19:49,429 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-09 10:19:49,430 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 10:19:49,430 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 10:19:49,430 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 10:19:49,430 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-09 10:19:49,431 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 10:19:49,431 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 10:19:49,431 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 10:19:49,431 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 10:19:49,431 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 10:19:49,431 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-09 10:19:49,432 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 10:19:49,432 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 10:19:49,432 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-09 10:19:49,432 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-09 10:19:49,433 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 10:19:49,433 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ca933e9c322081d61da01652cda9ceed61707699c680fd4ef3d92d3ccd39b362 [2024-11-09 10:19:49,691 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 10:19:49,726 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 10:19:49,729 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 10:19:49,731 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 10:19:49,731 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 10:19:49,732 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread/fib_safe-6.i [2024-11-09 10:19:51,214 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 10:19:51,470 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 10:19:51,472 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/fib_safe-6.i [2024-11-09 10:19:51,489 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2c05e4342/26639f81599d47da999a6fb921c1a967/FLAG06dd9d065 [2024-11-09 10:19:51,502 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2c05e4342/26639f81599d47da999a6fb921c1a967 [2024-11-09 10:19:51,504 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 10:19:51,506 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 10:19:51,508 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 10:19:51,509 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 10:19:51,513 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 10:19:51,514 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:19:51" (1/1) ... [2024-11-09 10:19:51,515 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38677618 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:19:51, skipping insertion in model container [2024-11-09 10:19:51,515 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:19:51" (1/1) ... [2024-11-09 10:19:51,553 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 10:19:51,886 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 10:19:51,896 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 10:19:51,936 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 10:19:51,968 INFO L204 MainTranslator]: Completed translation [2024-11-09 10:19:51,969 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:19:51 WrapperNode [2024-11-09 10:19:51,969 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 10:19:51,970 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 10:19:51,971 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 10:19:51,971 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 10:19:51,977 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:19:51" (1/1) ... [2024-11-09 10:19:51,992 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:19:51" (1/1) ... [2024-11-09 10:19:52,012 INFO L138 Inliner]: procedures = 164, calls = 21, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 68 [2024-11-09 10:19:52,014 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 10:19:52,015 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 10:19:52,015 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 10:19:52,015 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 10:19:52,024 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:19:51" (1/1) ... [2024-11-09 10:19:52,024 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:19:51" (1/1) ... [2024-11-09 10:19:52,028 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:19:51" (1/1) ... [2024-11-09 10:19:52,051 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]. [2024-11-09 10:19:52,051 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:19:51" (1/1) ... [2024-11-09 10:19:52,052 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:19:51" (1/1) ... [2024-11-09 10:19:52,055 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:19:51" (1/1) ... [2024-11-09 10:19:52,062 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:19:51" (1/1) ... [2024-11-09 10:19:52,066 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:19:51" (1/1) ... [2024-11-09 10:19:52,067 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:19:51" (1/1) ... [2024-11-09 10:19:52,069 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 10:19:52,074 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 10:19:52,074 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 10:19:52,074 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 10:19:52,075 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:19:51" (1/1) ... [2024-11-09 10:19:52,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 10:19:52,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:19:52,115 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) [2024-11-09 10:19:52,121 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 [2024-11-09 10:19:52,159 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2024-11-09 10:19:52,159 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2024-11-09 10:19:52,160 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2024-11-09 10:19:52,160 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2024-11-09 10:19:52,160 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-09 10:19:52,160 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 10:19:52,160 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-09 10:19:52,160 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-09 10:19:52,160 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 10:19:52,160 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 10:19:52,161 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-09 10:19:52,278 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 10:19:52,280 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 10:19:52,399 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-09 10:19:52,399 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 10:19:52,505 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 10:19:52,506 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-09 10:19:52,506 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:19:52 BoogieIcfgContainer [2024-11-09 10:19:52,506 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 10:19:52,509 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 10:19:52,510 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 10:19:52,513 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 10:19:52,513 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 10:19:51" (1/3) ... [2024-11-09 10:19:52,514 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b3a9a71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:19:52, skipping insertion in model container [2024-11-09 10:19:52,514 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:19:51" (2/3) ... [2024-11-09 10:19:52,514 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b3a9a71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:19:52, skipping insertion in model container [2024-11-09 10:19:52,514 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:19:52" (3/3) ... [2024-11-09 10:19:52,516 INFO L112 eAbstractionObserver]: Analyzing ICFG fib_safe-6.i [2024-11-09 10:19:52,529 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 10:19:52,530 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-11-09 10:19:52,530 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-09 10:19:52,562 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-09 10:19:52,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 36 places, 34 transitions, 76 flow [2024-11-09 10:19:52,619 INFO L124 PetriNetUnfolderBase]: 5/32 cut-off events. [2024-11-09 10:19:52,623 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-09 10:19:52,626 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 37 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. [2024-11-09 10:19:52,626 INFO L82 GeneralOperation]: Start removeDead. Operand has 36 places, 34 transitions, 76 flow [2024-11-09 10:19:52,630 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 34 places, 32 transitions, 70 flow [2024-11-09 10:19:52,641 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 10:19:52,647 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;@334a773d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 10:19:52,647 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-11-09 10:19:52,658 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-09 10:19:52,660 INFO L124 PetriNetUnfolderBase]: 5/29 cut-off events. [2024-11-09 10:19:52,660 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-09 10:19:52,661 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:19:52,661 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:19:52,662 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-09 10:19:52,666 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:19:52,666 INFO L85 PathProgramCache]: Analyzing trace with hash 563650960, now seen corresponding path program 1 times [2024-11-09 10:19:52,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:19:52,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448762540] [2024-11-09 10:19:52,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:19:52,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:19:52,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:19:52,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:19:52,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:19:52,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448762540] [2024-11-09 10:19:52,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448762540] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:19:52,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:19:52,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 10:19:52,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370606121] [2024-11-09 10:19:52,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:19:52,985 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 10:19:52,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:19:53,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 10:19:53,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 10:19:53,009 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 34 [2024-11-09 10:19:53,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 32 transitions, 70 flow. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:19:53,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:19:53,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 34 [2024-11-09 10:19:53,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:19:53,124 INFO L124 PetriNetUnfolderBase]: 151/292 cut-off events. [2024-11-09 10:19:53,124 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-09 10:19:53,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 535 conditions, 292 events. 151/292 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 993 event pairs, 20 based on Foata normal form. 18/296 useless extension candidates. Maximal degree in co-relation 521. Up to 172 conditions per place. [2024-11-09 10:19:53,128 INFO L140 encePairwiseOnDemand]: 29/34 looper letters, 22 selfloop transitions, 2 changer transitions 1/36 dead transitions. [2024-11-09 10:19:53,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 36 transitions, 128 flow [2024-11-09 10:19:53,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 10:19:53,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-09 10:19:53,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 67 transitions. [2024-11-09 10:19:53,139 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6568627450980392 [2024-11-09 10:19:53,140 INFO L175 Difference]: Start difference. First operand has 34 places, 32 transitions, 70 flow. Second operand 3 states and 67 transitions. [2024-11-09 10:19:53,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 36 transitions, 128 flow [2024-11-09 10:19:53,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 36 transitions, 126 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:19:53,144 INFO L231 Difference]: Finished difference. Result has 34 places, 29 transitions, 72 flow [2024-11-09 10:19:53,146 INFO L260 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} [2024-11-09 10:19:53,150 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 0 predicate places. [2024-11-09 10:19:53,151 INFO L471 AbstractCegarLoop]: Abstraction has has 34 places, 29 transitions, 72 flow [2024-11-09 10:19:53,151 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:19:53,152 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:19:53,152 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:19:53,152 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 10:19:53,152 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-09 10:19:53,153 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:19:53,153 INFO L85 PathProgramCache]: Analyzing trace with hash -488978942, now seen corresponding path program 1 times [2024-11-09 10:19:53,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:19:53,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945310030] [2024-11-09 10:19:53,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:19:53,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:19:53,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:19:53,251 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:19:53,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:19:53,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945310030] [2024-11-09 10:19:53,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945310030] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:19:53,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175769896] [2024-11-09 10:19:53,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:19:53,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:19:53,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:19:53,257 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) [2024-11-09 10:19:53,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 10:19:53,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:19:53,318 INFO L255 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 10:19:53,321 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:19:53,359 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:19:53,359 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 10:19:53,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175769896] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:19:53,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 10:19:53,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [4] total 5 [2024-11-09 10:19:53,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621891987] [2024-11-09 10:19:53,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:19:53,361 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 10:19:53,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:19:53,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 10:19:53,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-09 10:19:53,362 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 34 [2024-11-09 10:19:53,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 29 transitions, 72 flow. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 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) [2024-11-09 10:19:53,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:19:53,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 34 [2024-11-09 10:19:53,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:19:53,421 INFO L124 PetriNetUnfolderBase]: 133/256 cut-off events. [2024-11-09 10:19:53,422 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2024-11-09 10:19:53,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 509 conditions, 256 events. 133/256 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 816 event pairs, 80 based on Foata normal form. 9/248 useless extension candidates. Maximal degree in co-relation 494. Up to 204 conditions per place. [2024-11-09 10:19:53,424 INFO L140 encePairwiseOnDemand]: 32/34 looper letters, 16 selfloop transitions, 1 changer transitions 1/28 dead transitions. [2024-11-09 10:19:53,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 28 transitions, 106 flow [2024-11-09 10:19:53,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 10:19:53,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-09 10:19:53,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 54 transitions. [2024-11-09 10:19:53,426 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5294117647058824 [2024-11-09 10:19:53,426 INFO L175 Difference]: Start difference. First operand has 34 places, 29 transitions, 72 flow. Second operand 3 states and 54 transitions. [2024-11-09 10:19:53,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 28 transitions, 106 flow [2024-11-09 10:19:53,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 28 transitions, 104 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-09 10:19:53,427 INFO L231 Difference]: Finished difference. Result has 33 places, 27 transitions, 68 flow [2024-11-09 10:19:53,427 INFO L260 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} [2024-11-09 10:19:53,428 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, -1 predicate places. [2024-11-09 10:19:53,428 INFO L471 AbstractCegarLoop]: Abstraction has has 33 places, 27 transitions, 68 flow [2024-11-09 10:19:53,428 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 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) [2024-11-09 10:19:53,428 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:19:53,428 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:19:53,442 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-09 10:19:53,629 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 [2024-11-09 10:19:53,629 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-09 10:19:53,630 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:19:53,630 INFO L85 PathProgramCache]: Analyzing trace with hash -488977835, now seen corresponding path program 1 times [2024-11-09 10:19:53,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:19:53,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177611362] [2024-11-09 10:19:53,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:19:53,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:19:53,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:19:53,671 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:19:53,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:19:53,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177611362] [2024-11-09 10:19:53,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177611362] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:19:53,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149368303] [2024-11-09 10:19:53,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:19:53,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:19:53,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:19:53,674 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) [2024-11-09 10:19:53,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 10:19:53,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:19:53,731 INFO L255 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-09 10:19:53,732 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:19:53,754 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:19:53,754 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:19:53,776 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:19:53,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149368303] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:19:53,776 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:19:53,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-11-09 10:19:53,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088190251] [2024-11-09 10:19:53,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:19:53,777 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 10:19:53,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:19:53,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 10:19:53,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-09 10:19:53,778 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 34 [2024-11-09 10:19:53,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 27 transitions, 68 flow. Second operand has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 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) [2024-11-09 10:19:53,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:19:53,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 34 [2024-11-09 10:19:53,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:19:53,863 INFO L124 PetriNetUnfolderBase]: 169/310 cut-off events. [2024-11-09 10:19:53,864 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-09 10:19:53,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 636 conditions, 310 events. 169/310 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 926 event pairs, 20 based on Foata normal form. 0/299 useless extension candidates. Maximal degree in co-relation 628. Up to 118 conditions per place. [2024-11-09 10:19:53,868 INFO L140 encePairwiseOnDemand]: 31/34 looper letters, 39 selfloop transitions, 5 changer transitions 0/54 dead transitions. [2024-11-09 10:19:53,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 54 transitions, 216 flow [2024-11-09 10:19:53,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 10:19:53,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-09 10:19:53,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 125 transitions. [2024-11-09 10:19:53,871 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6127450980392157 [2024-11-09 10:19:53,871 INFO L175 Difference]: Start difference. First operand has 33 places, 27 transitions, 68 flow. Second operand 6 states and 125 transitions. [2024-11-09 10:19:53,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 54 transitions, 216 flow [2024-11-09 10:19:53,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 54 transitions, 215 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-09 10:19:53,873 INFO L231 Difference]: Finished difference. Result has 39 places, 30 transitions, 103 flow [2024-11-09 10:19:53,873 INFO L260 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} [2024-11-09 10:19:53,875 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 5 predicate places. [2024-11-09 10:19:53,876 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 30 transitions, 103 flow [2024-11-09 10:19:53,876 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 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) [2024-11-09 10:19:53,876 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:19:53,876 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:19:53,892 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-09 10:19:54,077 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 [2024-11-09 10:19:54,078 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-09 10:19:54,078 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:19:54,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1932997219, now seen corresponding path program 2 times [2024-11-09 10:19:54,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:19:54,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344441292] [2024-11-09 10:19:54,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:19:54,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:19:54,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:19:54,203 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:19:54,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:19:54,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344441292] [2024-11-09 10:19:54,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344441292] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:19:54,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882004023] [2024-11-09 10:19:54,204 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 10:19:54,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:19:54,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:19:54,207 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) [2024-11-09 10:19:54,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 10:19:54,274 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 10:19:54,275 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:19:54,275 INFO L255 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-09 10:19:54,277 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:19:54,295 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:19:54,296 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:19:54,346 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:19:54,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882004023] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:19:54,347 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:19:54,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-11-09 10:19:54,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639893339] [2024-11-09 10:19:54,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:19:54,348 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-09 10:19:54,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:19:54,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-09 10:19:54,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-11-09 10:19:54,349 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 34 [2024-11-09 10:19:54,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 30 transitions, 103 flow. Second operand has 13 states, 13 states have (on average 14.615384615384615) internal successors, (190), 13 states have internal predecessors, (190), 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) [2024-11-09 10:19:54,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:19:54,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 34 [2024-11-09 10:19:54,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:19:54,484 INFO L124 PetriNetUnfolderBase]: 277/472 cut-off events. [2024-11-09 10:19:54,485 INFO L125 PetriNetUnfolderBase]: For 216/216 co-relation queries the response was YES. [2024-11-09 10:19:54,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1171 conditions, 472 events. 277/472 cut-off events. For 216/216 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1325 event pairs, 20 based on Foata normal form. 54/524 useless extension candidates. Maximal degree in co-relation 1159. Up to 118 conditions per place. [2024-11-09 10:19:54,488 INFO L140 encePairwiseOnDemand]: 31/34 looper letters, 75 selfloop transitions, 11 changer transitions 0/96 dead transitions. [2024-11-09 10:19:54,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 96 transitions, 431 flow [2024-11-09 10:19:54,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-09 10:19:54,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-09 10:19:54,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 248 transitions. [2024-11-09 10:19:54,490 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6078431372549019 [2024-11-09 10:19:54,490 INFO L175 Difference]: Start difference. First operand has 39 places, 30 transitions, 103 flow. Second operand 12 states and 248 transitions. [2024-11-09 10:19:54,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 96 transitions, 431 flow [2024-11-09 10:19:54,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 96 transitions, 417 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-11-09 10:19:54,494 INFO L231 Difference]: Finished difference. Result has 55 places, 36 transitions, 173 flow [2024-11-09 10:19:54,494 INFO L260 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} [2024-11-09 10:19:54,495 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 21 predicate places. [2024-11-09 10:19:54,495 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 36 transitions, 173 flow [2024-11-09 10:19:54,496 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 14.615384615384615) internal successors, (190), 13 states have internal predecessors, (190), 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) [2024-11-09 10:19:54,496 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:19:54,496 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:19:54,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-09 10:19:54,696 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 [2024-11-09 10:19:54,697 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-09 10:19:54,698 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:19:54,698 INFO L85 PathProgramCache]: Analyzing trace with hash 749587747, now seen corresponding path program 3 times [2024-11-09 10:19:54,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:19:54,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282208846] [2024-11-09 10:19:54,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:19:54,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:19:54,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:19:54,894 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:19:54,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:19:54,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282208846] [2024-11-09 10:19:54,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282208846] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:19:54,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722343750] [2024-11-09 10:19:54,897 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 10:19:54,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:19:54,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:19:54,899 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) [2024-11-09 10:19:54,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 10:19:54,963 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-09 10:19:54,964 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:19:54,965 INFO L255 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-09 10:19:54,966 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:19:54,987 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:19:54,987 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:19:55,090 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:19:55,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722343750] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:19:55,090 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:19:55,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 17 [2024-11-09 10:19:55,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883346046] [2024-11-09 10:19:55,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:19:55,091 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-09 10:19:55,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:19:55,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-09 10:19:55,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2024-11-09 10:19:55,093 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 34 [2024-11-09 10:19:55,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 36 transitions, 173 flow. Second operand has 17 states, 17 states have (on average 14.529411764705882) internal successors, (247), 17 states have internal predecessors, (247), 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) [2024-11-09 10:19:55,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:19:55,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 34 [2024-11-09 10:19:55,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:19:55,257 INFO L124 PetriNetUnfolderBase]: 349/580 cut-off events. [2024-11-09 10:19:55,257 INFO L125 PetriNetUnfolderBase]: For 1620/1620 co-relation queries the response was YES. [2024-11-09 10:19:55,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1655 conditions, 580 events. 349/580 cut-off events. For 1620/1620 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1591 event pairs, 20 based on Foata normal form. 36/614 useless extension candidates. Maximal degree in co-relation 1636. Up to 118 conditions per place. [2024-11-09 10:19:55,261 INFO L140 encePairwiseOnDemand]: 31/34 looper letters, 99 selfloop transitions, 15 changer transitions 0/124 dead transitions. [2024-11-09 10:19:55,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 124 transitions, 601 flow [2024-11-09 10:19:55,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-09 10:19:55,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-09 10:19:55,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 326 transitions. [2024-11-09 10:19:55,263 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5992647058823529 [2024-11-09 10:19:55,263 INFO L175 Difference]: Start difference. First operand has 55 places, 36 transitions, 173 flow. Second operand 16 states and 326 transitions. [2024-11-09 10:19:55,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 124 transitions, 601 flow [2024-11-09 10:19:55,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 124 transitions, 545 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-11-09 10:19:55,269 INFO L231 Difference]: Finished difference. Result has 69 places, 40 transitions, 197 flow [2024-11-09 10:19:55,269 INFO L260 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=16, PETRI_FLOW=197, PETRI_PLACES=69, PETRI_TRANSITIONS=40} [2024-11-09 10:19:55,270 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 35 predicate places. [2024-11-09 10:19:55,270 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 40 transitions, 197 flow [2024-11-09 10:19:55,270 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 14.529411764705882) internal successors, (247), 17 states have internal predecessors, (247), 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) [2024-11-09 10:19:55,270 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:19:55,270 INFO L204 CegarLoopForPetriNet]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:19:55,287 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-09 10:19:55,474 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 [2024-11-09 10:19:55,475 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-09 10:19:55,475 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:19:55,476 INFO L85 PathProgramCache]: Analyzing trace with hash 350665123, now seen corresponding path program 4 times [2024-11-09 10:19:55,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:19:55,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122137350] [2024-11-09 10:19:55,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:19:55,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:19:55,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:19:56,195 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:19:56,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:19:56,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122137350] [2024-11-09 10:19:56,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122137350] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:19:56,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299311969] [2024-11-09 10:19:56,196 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 10:19:56,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:19:56,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:19:56,198 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) [2024-11-09 10:19:56,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 10:19:56,255 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 10:19:56,256 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:19:56,257 INFO L255 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-11-09 10:19:56,259 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:19:56,978 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 78 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:19:56,978 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:19:57,789 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:19:57,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299311969] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:19:57,790 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:19:57,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 60 [2024-11-09 10:19:57,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915634396] [2024-11-09 10:19:57,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:19:57,790 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2024-11-09 10:19:57,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:19:57,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2024-11-09 10:19:57,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=3159, Unknown=0, NotChecked=0, Total=3660 [2024-11-09 10:19:57,841 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2024-11-09 10:19:57,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 40 transitions, 197 flow. Second operand has 61 states, 61 states have (on average 8.278688524590164) internal successors, (505), 61 states have internal predecessors, (505), 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) [2024-11-09 10:19:57,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:19:57,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2024-11-09 10:19:57,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:20:13,773 INFO L124 PetriNetUnfolderBase]: 15682/25622 cut-off events. [2024-11-09 10:20:13,774 INFO L125 PetriNetUnfolderBase]: For 48027/48027 co-relation queries the response was YES. [2024-11-09 10:20:13,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67986 conditions, 25622 events. 15682/25622 cut-off events. For 48027/48027 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 165393 event pairs, 70 based on Foata normal form. 0/25297 useless extension candidates. Maximal degree in co-relation 67963. Up to 3279 conditions per place. [2024-11-09 10:20:14,026 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 580 selfloop transitions, 585 changer transitions 701/1870 dead transitions. [2024-11-09 10:20:14,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 1870 transitions, 11074 flow [2024-11-09 10:20:14,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 177 states. [2024-11-09 10:20:14,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2024-11-09 10:20:14,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 2714 transitions. [2024-11-09 10:20:14,043 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45098039215686275 [2024-11-09 10:20:14,043 INFO L175 Difference]: Start difference. First operand has 69 places, 40 transitions, 197 flow. Second operand 177 states and 2714 transitions. [2024-11-09 10:20:14,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 1870 transitions, 11074 flow [2024-11-09 10:20:14,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 1870 transitions, 9532 flow, removed 442 selfloop flow, removed 11 redundant places. [2024-11-09 10:20:14,156 INFO L231 Difference]: Finished difference. Result has 304 places, 679 transitions, 4095 flow [2024-11-09 10:20:14,157 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=149, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=177, PETRI_FLOW=4095, PETRI_PLACES=304, PETRI_TRANSITIONS=679} [2024-11-09 10:20:14,157 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 270 predicate places. [2024-11-09 10:20:14,158 INFO L471 AbstractCegarLoop]: Abstraction has has 304 places, 679 transitions, 4095 flow [2024-11-09 10:20:14,158 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 8.278688524590164) internal successors, (505), 61 states have internal predecessors, (505), 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) [2024-11-09 10:20:14,158 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:20:14,158 INFO L204 CegarLoopForPetriNet]: trace histogram [14, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:20:14,173 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-09 10:20:14,362 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 [2024-11-09 10:20:14,363 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-09 10:20:14,363 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:20:14,363 INFO L85 PathProgramCache]: Analyzing trace with hash -600576193, now seen corresponding path program 1 times [2024-11-09 10:20:14,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:20:14,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67173199] [2024-11-09 10:20:14,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:20:14,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:20:14,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:20:15,156 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:20:15,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:20:15,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67173199] [2024-11-09 10:20:15,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67173199] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:20:15,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380522335] [2024-11-09 10:20:15,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:20:15,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:20:15,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:20:15,159 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) [2024-11-09 10:20:15,159 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 10:20:15,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:20:15,222 INFO L255 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-11-09 10:20:15,225 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:20:16,046 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 78 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:20:16,047 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:20:17,118 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:20:17,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380522335] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:20:17,119 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:20:17,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 67 [2024-11-09 10:20:17,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029087139] [2024-11-09 10:20:17,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:20:17,120 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2024-11-09 10:20:17,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:20:17,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2024-11-09 10:20:17,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=545, Invalid=4011, Unknown=0, NotChecked=0, Total=4556 [2024-11-09 10:20:17,147 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2024-11-09 10:20:17,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 679 transitions, 4095 flow. Second operand has 68 states, 68 states have (on average 8.323529411764707) internal successors, (566), 68 states have internal predecessors, (566), 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) [2024-11-09 10:20:17,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:20:17,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2024-11-09 10:20:17,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand