./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/goblint-regression/06-symbeq_05-funloop_hard2.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/goblint-regression/06-symbeq_05-funloop_hard2.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 9e83a031749850377e0f1ecd2c361048b8f87f697f146600048034d31c93bd9a --- Real Ultimate output --- This is Ultimate 0.2.5-?-c7c6ca5-m [2024-11-09 10:39:30,388 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 10:39:30,482 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-09 10:39:30,488 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 10:39:30,489 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 10:39:30,519 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 10:39:30,520 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 10:39:30,520 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 10:39:30,521 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-09 10:39:30,521 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-09 10:39:30,522 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 10:39:30,522 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 10:39:30,523 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-09 10:39:30,523 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-09 10:39:30,523 INFO L153 SettingsManager]: * Use SBE=true [2024-11-09 10:39:30,524 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 10:39:30,524 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 10:39:30,525 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 10:39:30,525 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 10:39:30,525 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 10:39:30,526 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-09 10:39:30,526 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-09 10:39:30,526 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-09 10:39:30,527 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 10:39:30,527 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-09 10:39:30,527 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 10:39:30,528 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-09 10:39:30,528 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 10:39:30,528 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 10:39:30,529 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 10:39:30,529 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-09 10:39:30,529 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 10:39:30,530 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 10:39:30,530 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 10:39:30,530 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 10:39:30,530 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 10:39:30,531 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-09 10:39:30,531 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 10:39:30,531 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 10:39:30,532 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-09 10:39:30,532 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-09 10:39:30,535 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 10:39:30,535 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9e83a031749850377e0f1ecd2c361048b8f87f697f146600048034d31c93bd9a [2024-11-09 10:39:30,756 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 10:39:30,806 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 10:39:30,809 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 10:39:30,810 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 10:39:30,815 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 10:39:30,817 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/06-symbeq_05-funloop_hard2.i [2024-11-09 10:39:32,343 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 10:39:32,628 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 10:39:32,629 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/06-symbeq_05-funloop_hard2.i [2024-11-09 10:39:32,654 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/df8c54dd1/f781aa850f524589b9c526ae48dd268d/FLAG1259c7f06 [2024-11-09 10:39:32,669 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/df8c54dd1/f781aa850f524589b9c526ae48dd268d [2024-11-09 10:39:32,673 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 10:39:32,675 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 10:39:32,676 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 10:39:32,676 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 10:39:32,681 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 10:39:32,682 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:39:32" (1/1) ... [2024-11-09 10:39:32,683 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68837109 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:39:32, skipping insertion in model container [2024-11-09 10:39:32,683 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:39:32" (1/1) ... [2024-11-09 10:39:32,736 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 10:39:33,224 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 10:39:33,274 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 10:39:33,325 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 10:39:33,388 INFO L204 MainTranslator]: Completed translation [2024-11-09 10:39:33,389 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:39:33 WrapperNode [2024-11-09 10:39:33,389 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 10:39:33,390 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 10:39:33,390 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 10:39:33,390 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 10:39:33,397 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:39:33" (1/1) ... [2024-11-09 10:39:33,425 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:39:33" (1/1) ... [2024-11-09 10:39:33,465 INFO L138 Inliner]: procedures = 263, calls = 74, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 143 [2024-11-09 10:39:33,466 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 10:39:33,467 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 10:39:33,467 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 10:39:33,467 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 10:39:33,480 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:39:33" (1/1) ... [2024-11-09 10:39:33,480 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:39:33" (1/1) ... [2024-11-09 10:39:33,484 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:39:33" (1/1) ... [2024-11-09 10:39:33,509 INFO L175 MemorySlicer]: Split 66 memory accesses to 1 slices as follows [66]. 100 percent of accesses are in the largest equivalence class. The 60 initializations are split as follows [60]. The 3 writes are split as follows [3]. [2024-11-09 10:39:33,510 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:39:33" (1/1) ... [2024-11-09 10:39:33,510 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:39:33" (1/1) ... [2024-11-09 10:39:33,525 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:39:33" (1/1) ... [2024-11-09 10:39:33,529 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:39:33" (1/1) ... [2024-11-09 10:39:33,534 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:39:33" (1/1) ... [2024-11-09 10:39:33,535 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:39:33" (1/1) ... [2024-11-09 10:39:33,540 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 10:39:33,541 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 10:39:33,541 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 10:39:33,541 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 10:39:33,542 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:39:33" (1/1) ... [2024-11-09 10:39:33,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 10:39:33,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:39:33,592 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 10:39:33,600 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 10:39:33,649 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-11-09 10:39:33,649 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-09 10:39:33,650 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-09 10:39:33,650 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-11-09 10:39:33,650 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 10:39:33,650 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2024-11-09 10:39:33,650 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2024-11-09 10:39:33,650 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-09 10:39:33,650 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 10:39:33,650 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 10:39:33,652 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 10:39:33,776 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 10:39:33,778 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 10:39:34,117 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-09 10:39:34,118 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 10:39:34,447 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 10:39:34,450 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-09 10:39:34,451 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:39:34 BoogieIcfgContainer [2024-11-09 10:39:34,451 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 10:39:34,453 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 10:39:34,453 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 10:39:34,456 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 10:39:34,457 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 10:39:32" (1/3) ... [2024-11-09 10:39:34,458 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19a1816f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:39:34, skipping insertion in model container [2024-11-09 10:39:34,458 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:39:33" (2/3) ... [2024-11-09 10:39:34,458 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19a1816f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:39:34, skipping insertion in model container [2024-11-09 10:39:34,459 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:39:34" (3/3) ... [2024-11-09 10:39:34,460 INFO L112 eAbstractionObserver]: Analyzing ICFG 06-symbeq_05-funloop_hard2.i [2024-11-09 10:39:34,477 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 10:39:34,477 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 13 error locations. [2024-11-09 10:39:34,478 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-09 10:39:34,525 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-09 10:39:34,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 44 places, 43 transitions, 90 flow [2024-11-09 10:39:34,603 INFO L124 PetriNetUnfolderBase]: 3/42 cut-off events. [2024-11-09 10:39:34,603 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-09 10:39:34,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46 conditions, 42 events. 3/42 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 122 event pairs, 0 based on Foata normal form. 0/26 useless extension candidates. Maximal degree in co-relation 38. Up to 2 conditions per place. [2024-11-09 10:39:34,608 INFO L82 GeneralOperation]: Start removeDead. Operand has 44 places, 43 transitions, 90 flow [2024-11-09 10:39:34,611 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 42 transitions, 87 flow [2024-11-09 10:39:34,626 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 10:39:34,636 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;@41ba24ad, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 10:39:34,636 INFO L334 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2024-11-09 10:39:34,643 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-09 10:39:34,644 INFO L124 PetriNetUnfolderBase]: 1/16 cut-off events. [2024-11-09 10:39:34,644 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-09 10:39:34,644 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:39:34,645 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:39:34,646 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-09 10:39:34,652 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:39:34,652 INFO L85 PathProgramCache]: Analyzing trace with hash -42604094, now seen corresponding path program 1 times [2024-11-09 10:39:34,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:39:34,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220435217] [2024-11-09 10:39:34,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:39:34,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:39:34,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:39:34,989 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 10:39:34,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:39:34,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220435217] [2024-11-09 10:39:34,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220435217] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:39:34,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:39:34,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 10:39:34,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995110533] [2024-11-09 10:39:34,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:39:35,004 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 10:39:35,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:39:35,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 10:39:35,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 10:39:35,041 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-11-09 10:39:35,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 42 transitions, 87 flow. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:39:35,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:39:35,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-11-09 10:39:35,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:39:35,194 INFO L124 PetriNetUnfolderBase]: 114/317 cut-off events. [2024-11-09 10:39:35,195 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-09 10:39:35,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 551 conditions, 317 events. 114/317 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 1617 event pairs, 91 based on Foata normal form. 0/260 useless extension candidates. Maximal degree in co-relation 536. Up to 229 conditions per place. [2024-11-09 10:39:35,202 INFO L140 encePairwiseOnDemand]: 40/43 looper letters, 25 selfloop transitions, 2 changer transitions 0/43 dead transitions. [2024-11-09 10:39:35,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 43 transitions, 143 flow [2024-11-09 10:39:35,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 10:39:35,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-09 10:39:35,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 79 transitions. [2024-11-09 10:39:35,215 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6124031007751938 [2024-11-09 10:39:35,217 INFO L175 Difference]: Start difference. First operand has 43 places, 42 transitions, 87 flow. Second operand 3 states and 79 transitions. [2024-11-09 10:39:35,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 43 transitions, 143 flow [2024-11-09 10:39:35,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 43 transitions, 142 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-09 10:39:35,223 INFO L231 Difference]: Finished difference. Result has 45 places, 43 transitions, 98 flow [2024-11-09 10:39:35,226 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=45, PETRI_TRANSITIONS=43} [2024-11-09 10:39:35,232 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 2 predicate places. [2024-11-09 10:39:35,232 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 43 transitions, 98 flow [2024-11-09 10:39:35,232 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:39:35,233 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:39:35,233 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:39:35,234 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 10:39:35,234 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-09 10:39:35,234 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:39:35,235 INFO L85 PathProgramCache]: Analyzing trace with hash -361866624, now seen corresponding path program 1 times [2024-11-09 10:39:35,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:39:35,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525990598] [2024-11-09 10:39:35,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:39:35,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:39:35,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:39:35,374 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 10:39:35,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:39:35,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525990598] [2024-11-09 10:39:35,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525990598] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:39:35,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788470517] [2024-11-09 10:39:35,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:39:35,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:39:35,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:39:35,379 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 10:39:35,381 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 10:39:35,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:39:35,488 INFO L255 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-09 10:39:35,492 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:39:35,527 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 10:39:35,528 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:39:35,552 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 10:39:35,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788470517] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:39:35,553 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:39:35,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-11-09 10:39:35,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332039033] [2024-11-09 10:39:35,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:39:35,556 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 10:39:35,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:39:35,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 10:39:35,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-09 10:39:35,558 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-11-09 10:39:35,559 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 43 transitions, 98 flow. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 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 10:39:35,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:39:35,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-11-09 10:39:35,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:39:35,689 INFO L124 PetriNetUnfolderBase]: 114/320 cut-off events. [2024-11-09 10:39:35,690 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-09 10:39:35,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 566 conditions, 320 events. 114/320 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 1617 event pairs, 91 based on Foata normal form. 0/263 useless extension candidates. Maximal degree in co-relation 555. Up to 229 conditions per place. [2024-11-09 10:39:35,695 INFO L140 encePairwiseOnDemand]: 40/43 looper letters, 25 selfloop transitions, 5 changer transitions 0/46 dead transitions. [2024-11-09 10:39:35,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 46 transitions, 170 flow [2024-11-09 10:39:35,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 10:39:35,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-09 10:39:35,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 135 transitions. [2024-11-09 10:39:35,699 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5232558139534884 [2024-11-09 10:39:35,700 INFO L175 Difference]: Start difference. First operand has 45 places, 43 transitions, 98 flow. Second operand 6 states and 135 transitions. [2024-11-09 10:39:35,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 46 transitions, 170 flow [2024-11-09 10:39:35,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 46 transitions, 166 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-09 10:39:35,702 INFO L231 Difference]: Finished difference. Result has 52 places, 46 transitions, 130 flow [2024-11-09 10:39:35,704 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=130, PETRI_PLACES=52, PETRI_TRANSITIONS=46} [2024-11-09 10:39:35,705 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 9 predicate places. [2024-11-09 10:39:35,705 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 46 transitions, 130 flow [2024-11-09 10:39:35,705 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 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 10:39:35,705 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:39:35,705 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:39:35,721 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 10:39:35,906 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 10:39:35,906 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-09 10:39:35,907 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:39:35,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1948715364, now seen corresponding path program 2 times [2024-11-09 10:39:35,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:39:35,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509831220] [2024-11-09 10:39:35,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:39:35,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:39:35,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:39:36,096 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 10:39:36,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:39:36,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509831220] [2024-11-09 10:39:36,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509831220] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:39:36,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815499123] [2024-11-09 10:39:36,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 10:39:36,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:39:36,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:39:36,100 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 10:39:36,102 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 10:39:36,188 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-09 10:39:36,188 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:39:36,190 INFO L255 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-09 10:39:36,192 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:39:36,346 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-09 10:39:36,347 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 10:39:36,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815499123] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:39:36,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 10:39:36,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 9 [2024-11-09 10:39:36,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997829968] [2024-11-09 10:39:36,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:39:36,348 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 10:39:36,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:39:36,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 10:39:36,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-11-09 10:39:36,386 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-11-09 10:39:36,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 46 transitions, 130 flow. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 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 10:39:36,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:39:36,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-11-09 10:39:36,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:39:36,589 INFO L124 PetriNetUnfolderBase]: 226/559 cut-off events. [2024-11-09 10:39:36,590 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-09 10:39:36,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1042 conditions, 559 events. 226/559 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 2801 event pairs, 93 based on Foata normal form. 0/497 useless extension candidates. Maximal degree in co-relation 1009. Up to 288 conditions per place. [2024-11-09 10:39:36,594 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 62 selfloop transitions, 4 changer transitions 0/78 dead transitions. [2024-11-09 10:39:36,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 78 transitions, 326 flow [2024-11-09 10:39:36,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 10:39:36,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-09 10:39:36,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 136 transitions. [2024-11-09 10:39:36,597 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6325581395348837 [2024-11-09 10:39:36,597 INFO L175 Difference]: Start difference. First operand has 52 places, 46 transitions, 130 flow. Second operand 5 states and 136 transitions. [2024-11-09 10:39:36,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 78 transitions, 326 flow [2024-11-09 10:39:36,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 78 transitions, 312 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-11-09 10:39:36,600 INFO L231 Difference]: Finished difference. Result has 55 places, 46 transitions, 138 flow [2024-11-09 10:39:36,600 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=138, PETRI_PLACES=55, PETRI_TRANSITIONS=46} [2024-11-09 10:39:36,601 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 12 predicate places. [2024-11-09 10:39:36,601 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 46 transitions, 138 flow [2024-11-09 10:39:36,602 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 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 10:39:36,602 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:39:36,602 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:39:36,620 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 10:39:36,806 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 10:39:36,807 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-09 10:39:36,808 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:39:36,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1948715363, now seen corresponding path program 1 times [2024-11-09 10:39:36,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:39:36,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640565146] [2024-11-09 10:39:36,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:39:36,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:39:36,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:39:36,906 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-09 10:39:36,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:39:36,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640565146] [2024-11-09 10:39:36,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640565146] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:39:36,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:39:36,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 10:39:36,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320332692] [2024-11-09 10:39:36,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:39:36,908 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:39:36,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:39:36,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:39:36,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 10:39:36,971 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-11-09 10:39:36,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 46 transitions, 138 flow. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 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 10:39:36,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:39:36,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-11-09 10:39:36,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:39:37,106 INFO L124 PetriNetUnfolderBase]: 198/477 cut-off events. [2024-11-09 10:39:37,107 INFO L125 PetriNetUnfolderBase]: For 93/93 co-relation queries the response was YES. [2024-11-09 10:39:37,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1041 conditions, 477 events. 198/477 cut-off events. For 93/93 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 2239 event pairs, 39 based on Foata normal form. 0/443 useless extension candidates. Maximal degree in co-relation 1011. Up to 280 conditions per place. [2024-11-09 10:39:37,111 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 41 selfloop transitions, 5 changer transitions 0/56 dead transitions. [2024-11-09 10:39:37,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 56 transitions, 250 flow [2024-11-09 10:39:37,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:39:37,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:39:37,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 98 transitions. [2024-11-09 10:39:37,113 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5697674418604651 [2024-11-09 10:39:37,113 INFO L175 Difference]: Start difference. First operand has 55 places, 46 transitions, 138 flow. Second operand 4 states and 98 transitions. [2024-11-09 10:39:37,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 56 transitions, 250 flow [2024-11-09 10:39:37,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 56 transitions, 246 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:39:37,116 INFO L231 Difference]: Finished difference. Result has 52 places, 42 transitions, 136 flow [2024-11-09 10:39:37,116 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=136, PETRI_PLACES=52, PETRI_TRANSITIONS=42} [2024-11-09 10:39:37,117 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 9 predicate places. [2024-11-09 10:39:37,117 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 42 transitions, 136 flow [2024-11-09 10:39:37,118 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 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 10:39:37,118 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:39:37,119 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:39:37,119 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-09 10:39:37,119 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-09 10:39:37,120 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:39:37,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1918963906, now seen corresponding path program 1 times [2024-11-09 10:39:37,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:39:37,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259191444] [2024-11-09 10:39:37,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:39:37,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:39:37,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:39:37,249 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-09 10:39:37,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:39:37,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259191444] [2024-11-09 10:39:37,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259191444] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:39:37,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:39:37,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 10:39:37,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428563159] [2024-11-09 10:39:37,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:39:37,251 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:39:37,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:39:37,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:39:37,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 10:39:37,289 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-11-09 10:39:37,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 42 transitions, 136 flow. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 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 10:39:37,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:39:37,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-11-09 10:39:37,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:39:37,414 INFO L124 PetriNetUnfolderBase]: 198/484 cut-off events. [2024-11-09 10:39:37,415 INFO L125 PetriNetUnfolderBase]: For 170/170 co-relation queries the response was YES. [2024-11-09 10:39:37,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1080 conditions, 484 events. 198/484 cut-off events. For 170/170 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 2324 event pairs, 104 based on Foata normal form. 0/469 useless extension candidates. Maximal degree in co-relation 1050. Up to 260 conditions per place. [2024-11-09 10:39:37,420 INFO L140 encePairwiseOnDemand]: 38/43 looper letters, 39 selfloop transitions, 3 changer transitions 0/50 dead transitions. [2024-11-09 10:39:37,420 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 50 transitions, 258 flow [2024-11-09 10:39:37,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:39:37,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:39:37,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 88 transitions. [2024-11-09 10:39:37,424 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5116279069767442 [2024-11-09 10:39:37,424 INFO L175 Difference]: Start difference. First operand has 52 places, 42 transitions, 136 flow. Second operand 4 states and 88 transitions. [2024-11-09 10:39:37,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 50 transitions, 258 flow [2024-11-09 10:39:37,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 50 transitions, 240 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-09 10:39:37,428 INFO L231 Difference]: Finished difference. Result has 50 places, 40 transitions, 128 flow [2024-11-09 10:39:37,428 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=128, PETRI_PLACES=50, PETRI_TRANSITIONS=40} [2024-11-09 10:39:37,429 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 7 predicate places. [2024-11-09 10:39:37,430 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 40 transitions, 128 flow [2024-11-09 10:39:37,430 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 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 10:39:37,430 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:39:37,430 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:39:37,430 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-09 10:39:37,431 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-09 10:39:37,431 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:39:37,431 INFO L85 PathProgramCache]: Analyzing trace with hash 1918963907, now seen corresponding path program 1 times [2024-11-09 10:39:37,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:39:37,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545313785] [2024-11-09 10:39:37,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:39:37,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:39:37,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:39:37,537 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 10:39:37,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:39:37,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545313785] [2024-11-09 10:39:37,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545313785] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:39:37,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594414237] [2024-11-09 10:39:37,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:39:37,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:39:37,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:39:37,542 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 10:39:37,544 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 10:39:37,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:39:37,629 INFO L255 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-09 10:39:37,630 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:39:37,655 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 10:39:37,655 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:39:37,715 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 10:39:37,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594414237] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:39:37,716 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:39:37,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-11-09 10:39:37,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173319097] [2024-11-09 10:39:37,716 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:39:37,716 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-09 10:39:37,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:39:37,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-09 10:39:37,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-11-09 10:39:37,718 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-11-09 10:39:37,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 40 transitions, 128 flow. Second operand has 13 states, 13 states have (on average 18.384615384615383) internal successors, (239), 13 states have internal predecessors, (239), 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 10:39:37,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:39:37,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-11-09 10:39:37,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:39:37,883 INFO L124 PetriNetUnfolderBase]: 198/475 cut-off events. [2024-11-09 10:39:37,883 INFO L125 PetriNetUnfolderBase]: For 98/98 co-relation queries the response was YES. [2024-11-09 10:39:37,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1071 conditions, 475 events. 198/475 cut-off events. For 98/98 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 2126 event pairs, 169 based on Foata normal form. 6/465 useless extension candidates. Maximal degree in co-relation 1017. Up to 397 conditions per place. [2024-11-09 10:39:37,887 INFO L140 encePairwiseOnDemand]: 40/43 looper letters, 27 selfloop transitions, 11 changer transitions 0/46 dead transitions. [2024-11-09 10:39:37,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 46 transitions, 240 flow [2024-11-09 10:39:37,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-09 10:39:37,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-09 10:39:37,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 246 transitions. [2024-11-09 10:39:37,889 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47674418604651164 [2024-11-09 10:39:37,889 INFO L175 Difference]: Start difference. First operand has 50 places, 40 transitions, 128 flow. Second operand 12 states and 246 transitions. [2024-11-09 10:39:37,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 46 transitions, 240 flow [2024-11-09 10:39:37,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 46 transitions, 234 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-09 10:39:37,892 INFO L231 Difference]: Finished difference. Result has 64 places, 46 transitions, 206 flow [2024-11-09 10:39:37,892 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=206, PETRI_PLACES=64, PETRI_TRANSITIONS=46} [2024-11-09 10:39:37,893 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 21 predicate places. [2024-11-09 10:39:37,893 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 46 transitions, 206 flow [2024-11-09 10:39:37,893 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 18.384615384615383) internal successors, (239), 13 states have internal predecessors, (239), 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 10:39:37,893 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:39:37,893 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:39:37,911 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-09 10:39:38,094 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:39:38,095 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-09 10:39:38,096 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:39:38,096 INFO L85 PathProgramCache]: Analyzing trace with hash 909392707, now seen corresponding path program 2 times [2024-11-09 10:39:38,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:39:38,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457495779] [2024-11-09 10:39:38,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:39:38,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:39:38,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:39:38,281 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-11-09 10:39:38,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:39:38,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457495779] [2024-11-09 10:39:38,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457495779] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:39:38,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:39:38,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 10:39:38,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193037594] [2024-11-09 10:39:38,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:39:38,283 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 10:39:38,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:39:38,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 10:39:38,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-09 10:39:38,322 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-11-09 10:39:38,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 46 transitions, 206 flow. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 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 10:39:38,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:39:38,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-11-09 10:39:38,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:39:38,498 INFO L124 PetriNetUnfolderBase]: 310/700 cut-off events. [2024-11-09 10:39:38,498 INFO L125 PetriNetUnfolderBase]: For 170/170 co-relation queries the response was YES. [2024-11-09 10:39:38,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1557 conditions, 700 events. 310/700 cut-off events. For 170/170 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 3292 event pairs, 195 based on Foata normal form. 0/636 useless extension candidates. Maximal degree in co-relation 1480. Up to 462 conditions per place. [2024-11-09 10:39:38,503 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 62 selfloop transitions, 4 changer transitions 0/72 dead transitions. [2024-11-09 10:39:38,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 72 transitions, 418 flow [2024-11-09 10:39:38,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 10:39:38,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-09 10:39:38,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-11-09 10:39:38,504 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5488372093023256 [2024-11-09 10:39:38,504 INFO L175 Difference]: Start difference. First operand has 64 places, 46 transitions, 206 flow. Second operand 5 states and 118 transitions. [2024-11-09 10:39:38,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 72 transitions, 418 flow [2024-11-09 10:39:38,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 72 transitions, 370 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-11-09 10:39:38,511 INFO L231 Difference]: Finished difference. Result has 65 places, 48 transitions, 184 flow [2024-11-09 10:39:38,512 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=184, PETRI_PLACES=65, PETRI_TRANSITIONS=48} [2024-11-09 10:39:38,513 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 22 predicate places. [2024-11-09 10:39:38,513 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 48 transitions, 184 flow [2024-11-09 10:39:38,513 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 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 10:39:38,513 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:39:38,513 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:39:38,514 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-09 10:39:38,515 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-09 10:39:38,515 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:39:38,515 INFO L85 PathProgramCache]: Analyzing trace with hash 1322317096, now seen corresponding path program 1 times [2024-11-09 10:39:38,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:39:38,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197053818] [2024-11-09 10:39:38,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:39:38,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:39:38,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:39:38,775 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-11-09 10:39:38,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:39:38,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197053818] [2024-11-09 10:39:38,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197053818] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:39:38,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401106121] [2024-11-09 10:39:38,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:39:38,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:39:38,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:39:38,779 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 10:39:38,780 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 10:39:38,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:39:38,891 INFO L255 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-09 10:39:38,894 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:39:39,126 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-11-09 10:39:39,126 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:39:39,299 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-11-09 10:39:39,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401106121] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:39:39,302 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:39:39,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2024-11-09 10:39:39,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24977832] [2024-11-09 10:39:39,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:39:39,303 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-09 10:39:39,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:39:39,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-09 10:39:39,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2024-11-09 10:39:39,511 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-11-09 10:39:39,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 48 transitions, 184 flow. Second operand has 14 states, 14 states have (on average 16.0) internal successors, (224), 14 states have internal predecessors, (224), 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 10:39:39,512 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:39:39,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-11-09 10:39:39,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:39:40,107 INFO L124 PetriNetUnfolderBase]: 548/1212 cut-off events. [2024-11-09 10:39:40,108 INFO L125 PetriNetUnfolderBase]: For 437/437 co-relation queries the response was YES. [2024-11-09 10:39:40,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2849 conditions, 1212 events. 548/1212 cut-off events. For 437/437 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 5454 event pairs, 124 based on Foata normal form. 98/1257 useless extension candidates. Maximal degree in co-relation 2793. Up to 350 conditions per place. [2024-11-09 10:39:40,117 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 141 selfloop transitions, 12 changer transitions 0/159 dead transitions. [2024-11-09 10:39:40,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 159 transitions, 848 flow [2024-11-09 10:39:40,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-09 10:39:40,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-09 10:39:40,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 289 transitions. [2024-11-09 10:39:40,119 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.560077519379845 [2024-11-09 10:39:40,119 INFO L175 Difference]: Start difference. First operand has 65 places, 48 transitions, 184 flow. Second operand 12 states and 289 transitions. [2024-11-09 10:39:40,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 159 transitions, 848 flow [2024-11-09 10:39:40,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 159 transitions, 844 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:39:40,124 INFO L231 Difference]: Finished difference. Result has 80 places, 54 transitions, 259 flow [2024-11-09 10:39:40,124 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=259, PETRI_PLACES=80, PETRI_TRANSITIONS=54} [2024-11-09 10:39:40,125 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 37 predicate places. [2024-11-09 10:39:40,125 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 54 transitions, 259 flow [2024-11-09 10:39:40,126 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 16.0) internal successors, (224), 14 states have internal predecessors, (224), 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 10:39:40,126 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:39:40,126 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:39:40,145 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-09 10:39:40,330 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:39:40,331 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-09 10:39:40,331 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:39:40,331 INFO L85 PathProgramCache]: Analyzing trace with hash -546771875, now seen corresponding path program 1 times [2024-11-09 10:39:40,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:39:40,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320872456] [2024-11-09 10:39:40,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:39:40,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:39:40,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:39:40,600 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-11-09 10:39:40,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:39:40,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320872456] [2024-11-09 10:39:40,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320872456] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:39:40,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824938086] [2024-11-09 10:39:40,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:39:40,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:39:40,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:39:40,603 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 10:39:40,605 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 10:39:40,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:39:40,714 INFO L255 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-09 10:39:40,716 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:39:40,897 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-11-09 10:39:40,897 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:39:41,057 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-11-09 10:39:41,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824938086] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:39:41,058 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:39:41,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2024-11-09 10:39:41,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876855449] [2024-11-09 10:39:41,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:39:41,059 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-09 10:39:41,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:39:41,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-09 10:39:41,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2024-11-09 10:39:41,220 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-11-09 10:39:41,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 54 transitions, 259 flow. Second operand has 14 states, 14 states have (on average 16.0) internal successors, (224), 14 states have internal predecessors, (224), 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 10:39:41,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:39:41,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-11-09 10:39:41,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:39:42,033 INFO L124 PetriNetUnfolderBase]: 1256/2734 cut-off events. [2024-11-09 10:39:42,033 INFO L125 PetriNetUnfolderBase]: For 2677/2677 co-relation queries the response was YES. [2024-11-09 10:39:42,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7175 conditions, 2734 events. 1256/2734 cut-off events. For 2677/2677 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 15198 event pairs, 185 based on Foata normal form. 266/2962 useless extension candidates. Maximal degree in co-relation 7112. Up to 470 conditions per place. [2024-11-09 10:39:42,119 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 265 selfloop transitions, 12 changer transitions 0/282 dead transitions. [2024-11-09 10:39:42,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 282 transitions, 1945 flow [2024-11-09 10:39:42,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-09 10:39:42,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-09 10:39:42,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 343 transitions. [2024-11-09 10:39:42,121 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6647286821705426 [2024-11-09 10:39:42,121 INFO L175 Difference]: Start difference. First operand has 80 places, 54 transitions, 259 flow. Second operand 12 states and 343 transitions. [2024-11-09 10:39:42,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 282 transitions, 1945 flow [2024-11-09 10:39:42,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 282 transitions, 1764 flow, removed 70 selfloop flow, removed 3 redundant places. [2024-11-09 10:39:42,129 INFO L231 Difference]: Finished difference. Result has 94 places, 60 transitions, 319 flow [2024-11-09 10:39:42,130 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=319, PETRI_PLACES=94, PETRI_TRANSITIONS=60} [2024-11-09 10:39:42,130 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 51 predicate places. [2024-11-09 10:39:42,130 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 60 transitions, 319 flow [2024-11-09 10:39:42,131 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 16.0) internal successors, (224), 14 states have internal predecessors, (224), 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 10:39:42,131 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:39:42,131 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2024-11-09 10:39:42,152 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-09 10:39:42,332 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:39:42,332 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-09 10:39:42,332 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:39:42,333 INFO L85 PathProgramCache]: Analyzing trace with hash 1788139428, now seen corresponding path program 2 times [2024-11-09 10:39:42,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:39:42,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138047206] [2024-11-09 10:39:42,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:39:42,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:39:42,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:39:42,728 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-11-09 10:39:42,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:39:42,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138047206] [2024-11-09 10:39:42,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138047206] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:39:42,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9710064] [2024-11-09 10:39:42,729 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 10:39:42,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:39:42,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:39:42,731 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 10:39:42,733 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 10:39:42,862 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 10:39:42,862 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:39:42,865 INFO L255 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-09 10:39:42,869 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:39:43,300 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-11-09 10:39:43,302 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:39:43,581 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-11-09 10:39:43,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9710064] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:39:43,582 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:39:43,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 21 [2024-11-09 10:39:43,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188315505] [2024-11-09 10:39:43,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:39:43,586 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-09 10:39:43,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:39:43,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-09 10:39:43,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2024-11-09 10:39:43,996 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-11-09 10:39:43,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 60 transitions, 319 flow. Second operand has 23 states, 23 states have (on average 17.17391304347826) internal successors, (395), 23 states have internal predecessors, (395), 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 10:39:43,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:39:43,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-11-09 10:39:43,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:39:46,373 INFO L124 PetriNetUnfolderBase]: 2624/5694 cut-off events. [2024-11-09 10:39:46,373 INFO L125 PetriNetUnfolderBase]: For 9839/9839 co-relation queries the response was YES. [2024-11-09 10:39:46,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16198 conditions, 5694 events. 2624/5694 cut-off events. For 9839/9839 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 33023 event pairs, 150 based on Foata normal form. 456/6150 useless extension candidates. Maximal degree in co-relation 16127. Up to 571 conditions per place. [2024-11-09 10:39:46,412 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 565 selfloop transitions, 24 changer transitions 0/594 dead transitions. [2024-11-09 10:39:46,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 594 transitions, 3819 flow [2024-11-09 10:39:46,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-09 10:39:46,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-11-09 10:39:46,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 705 transitions. [2024-11-09 10:39:46,415 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6831395348837209 [2024-11-09 10:39:46,415 INFO L175 Difference]: Start difference. First operand has 94 places, 60 transitions, 319 flow. Second operand 24 states and 705 transitions. [2024-11-09 10:39:46,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 594 transitions, 3819 flow [2024-11-09 10:39:46,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 594 transitions, 3788 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-11-09 10:39:46,451 INFO L231 Difference]: Finished difference. Result has 127 places, 73 transitions, 476 flow [2024-11-09 10:39:46,452 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=300, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=476, PETRI_PLACES=127, PETRI_TRANSITIONS=73} [2024-11-09 10:39:46,452 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 84 predicate places. [2024-11-09 10:39:46,453 INFO L471 AbstractCegarLoop]: Abstraction has has 127 places, 73 transitions, 476 flow [2024-11-09 10:39:46,454 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 17.17391304347826) internal successors, (395), 23 states have internal predecessors, (395), 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 10:39:46,454 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:39:46,454 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2024-11-09 10:39:46,473 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-09 10:39:46,654 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:39:46,655 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-09 10:39:46,656 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:39:46,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1751442429, now seen corresponding path program 2 times [2024-11-09 10:39:46,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:39:46,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205322018] [2024-11-09 10:39:46,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:39:46,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:39:46,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:39:47,022 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-11-09 10:39:47,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:39:47,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205322018] [2024-11-09 10:39:47,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205322018] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:39:47,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883318179] [2024-11-09 10:39:47,023 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 10:39:47,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:39:47,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:39:47,025 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:39:47,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 10:39:47,244 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 10:39:47,244 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:39:47,246 INFO L255 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-09 10:39:47,249 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:39:47,619 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 46 proven. 12 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-11-09 10:39:47,622 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:39:48,126 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 42 proven. 16 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-11-09 10:39:48,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883318179] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:39:48,126 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:39:48,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 21 [2024-11-09 10:39:48,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252595531] [2024-11-09 10:39:48,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:39:48,127 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-09 10:39:48,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:39:48,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-09 10:39:48,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2024-11-09 10:39:48,510 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-11-09 10:39:48,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 73 transitions, 476 flow. Second operand has 23 states, 23 states have (on average 17.17391304347826) internal successors, (395), 23 states have internal predecessors, (395), 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 10:39:48,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:39:48,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-11-09 10:39:48,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:39:50,290 INFO L124 PetriNetUnfolderBase]: 2994/6566 cut-off events. [2024-11-09 10:39:50,291 INFO L125 PetriNetUnfolderBase]: For 15119/15119 co-relation queries the response was YES. [2024-11-09 10:39:50,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19989 conditions, 6566 events. 2994/6566 cut-off events. For 15119/15119 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 40242 event pairs, 67 based on Foata normal form. 204/6770 useless extension candidates. Maximal degree in co-relation 19904. Up to 1020 conditions per place. [2024-11-09 10:39:50,339 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 433 selfloop transitions, 15 changer transitions 0/453 dead transitions. [2024-11-09 10:39:50,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 453 transitions, 4432 flow [2024-11-09 10:39:50,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-09 10:39:50,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-09 10:39:50,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 350 transitions. [2024-11-09 10:39:50,342 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5426356589147286 [2024-11-09 10:39:50,342 INFO L175 Difference]: Start difference. First operand has 127 places, 73 transitions, 476 flow. Second operand 15 states and 350 transitions. [2024-11-09 10:39:50,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 453 transitions, 4432 flow [2024-11-09 10:39:50,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 453 transitions, 3877 flow, removed 169 selfloop flow, removed 13 redundant places. [2024-11-09 10:39:50,375 INFO L231 Difference]: Finished difference. Result has 128 places, 74 transitions, 460 flow [2024-11-09 10:39:50,375 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=415, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=460, PETRI_PLACES=128, PETRI_TRANSITIONS=74} [2024-11-09 10:39:50,376 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 85 predicate places. [2024-11-09 10:39:50,376 INFO L471 AbstractCegarLoop]: Abstraction has has 128 places, 74 transitions, 460 flow [2024-11-09 10:39:50,376 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 17.17391304347826) internal successors, (395), 23 states have internal predecessors, (395), 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 10:39:50,377 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:39:50,377 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:39:50,396 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-09 10:39:50,580 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:39:50,581 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-09 10:39:50,581 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:39:50,581 INFO L85 PathProgramCache]: Analyzing trace with hash 237533891, now seen corresponding path program 1 times [2024-11-09 10:39:50,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:39:50,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100510428] [2024-11-09 10:39:50,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:39:50,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:39:50,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:39:50,683 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2024-11-09 10:39:50,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:39:50,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100510428] [2024-11-09 10:39:50,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100510428] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:39:50,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:39:50,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-09 10:39:50,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808805203] [2024-11-09 10:39:50,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:39:50,685 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 10:39:50,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:39:50,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 10:39:50,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 10:39:50,697 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 43 [2024-11-09 10:39:50,697 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 74 transitions, 460 flow. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:39:50,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:39:50,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 43 [2024-11-09 10:39:50,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:39:51,686 INFO L124 PetriNetUnfolderBase]: 2994/6531 cut-off events. [2024-11-09 10:39:51,686 INFO L125 PetriNetUnfolderBase]: For 13547/13547 co-relation queries the response was YES. [2024-11-09 10:39:51,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20264 conditions, 6531 events. 2994/6531 cut-off events. For 13547/13547 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 39923 event pairs, 2881 based on Foata normal form. 68/6598 useless extension candidates. Maximal degree in co-relation 20181. Up to 5998 conditions per place. [2024-11-09 10:39:51,741 INFO L140 encePairwiseOnDemand]: 41/43 looper letters, 67 selfloop transitions, 1 changer transitions 1/73 dead transitions. [2024-11-09 10:39:51,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 73 transitions, 596 flow [2024-11-09 10:39:51,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 10:39:51,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-09 10:39:51,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 75 transitions. [2024-11-09 10:39:51,742 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5813953488372093 [2024-11-09 10:39:51,743 INFO L175 Difference]: Start difference. First operand has 128 places, 74 transitions, 460 flow. Second operand 3 states and 75 transitions. [2024-11-09 10:39:51,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 73 transitions, 596 flow [2024-11-09 10:39:51,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 73 transitions, 570 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-11-09 10:39:51,807 INFO L231 Difference]: Finished difference. Result has 119 places, 72 transitions, 412 flow [2024-11-09 10:39:51,808 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=432, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=412, PETRI_PLACES=119, PETRI_TRANSITIONS=72} [2024-11-09 10:39:51,808 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 76 predicate places. [2024-11-09 10:39:51,809 INFO L471 AbstractCegarLoop]: Abstraction has has 119 places, 72 transitions, 412 flow [2024-11-09 10:39:51,809 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:39:51,809 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:39:51,809 INFO L204 CegarLoopForPetriNet]: trace histogram [11, 11, 11, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1] [2024-11-09 10:39:51,810 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-09 10:39:51,810 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-09 10:39:51,810 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:39:51,811 INFO L85 PathProgramCache]: Analyzing trace with hash 887910724, now seen corresponding path program 3 times [2024-11-09 10:39:51,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:39:51,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456580533] [2024-11-09 10:39:51,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:39:51,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:39:51,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:39:52,226 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 291 proven. 64 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-11-09 10:39:52,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:39:52,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456580533] [2024-11-09 10:39:52,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456580533] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:39:52,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69363374] [2024-11-09 10:39:52,228 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 10:39:52,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:39:52,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:39:52,230 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:39:52,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-09 10:39:52,384 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-09 10:39:52,385 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:39:52,387 INFO L255 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-09 10:39:52,395 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:39:52,988 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 64 proven. 30 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2024-11-09 10:39:52,988 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:39:53,579 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2024-11-09 10:39:53,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69363374] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:39:53,580 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:39:53,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5, 5] total 23 [2024-11-09 10:39:53,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210057711] [2024-11-09 10:39:53,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:39:53,582 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-09 10:39:53,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:39:53,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-09 10:39:53,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2024-11-09 10:39:53,767 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-11-09 10:39:53,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 72 transitions, 412 flow. Second operand has 23 states, 23 states have (on average 17.695652173913043) internal successors, (407), 23 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:39:53,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:39:53,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-11-09 10:39:53,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:39:55,907 INFO L124 PetriNetUnfolderBase]: 2686/5873 cut-off events. [2024-11-09 10:39:55,907 INFO L125 PetriNetUnfolderBase]: For 6879/6879 co-relation queries the response was YES. [2024-11-09 10:39:55,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16770 conditions, 5873 events. 2686/5873 cut-off events. For 6879/6879 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 34849 event pairs, 0 based on Foata normal form. 44/5917 useless extension candidates. Maximal degree in co-relation 16721. Up to 485 conditions per place. [2024-11-09 10:39:55,936 INFO L140 encePairwiseOnDemand]: 38/43 looper letters, 0 selfloop transitions, 0 changer transitions 653/653 dead transitions. [2024-11-09 10:39:55,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 653 transitions, 4255 flow [2024-11-09 10:39:55,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-09 10:39:55,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-11-09 10:39:55,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 713 transitions. [2024-11-09 10:39:55,940 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6632558139534884 [2024-11-09 10:39:55,940 INFO L175 Difference]: Start difference. First operand has 119 places, 72 transitions, 412 flow. Second operand 25 states and 713 transitions. [2024-11-09 10:39:55,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 653 transitions, 4255 flow [2024-11-09 10:39:55,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 653 transitions, 4175 flow, removed 6 selfloop flow, removed 24 redundant places. [2024-11-09 10:39:55,994 INFO L231 Difference]: Finished difference. Result has 116 places, 0 transitions, 0 flow [2024-11-09 10:39:55,994 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=298, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=0, PETRI_PLACES=116, PETRI_TRANSITIONS=0} [2024-11-09 10:39:55,994 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 73 predicate places. [2024-11-09 10:39:55,995 INFO L471 AbstractCegarLoop]: Abstraction has has 116 places, 0 transitions, 0 flow [2024-11-09 10:39:55,995 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 17.695652173913043) internal successors, (407), 23 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:39:55,998 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 18 remaining) [2024-11-09 10:39:55,998 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 18 remaining) [2024-11-09 10:39:55,998 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 18 remaining) [2024-11-09 10:39:55,998 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 18 remaining) [2024-11-09 10:39:55,998 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 18 remaining) [2024-11-09 10:39:55,999 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 18 remaining) [2024-11-09 10:39:55,999 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 18 remaining) [2024-11-09 10:39:55,999 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 18 remaining) [2024-11-09 10:39:55,999 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK (9 of 18 remaining) [2024-11-09 10:39:55,999 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 18 remaining) [2024-11-09 10:39:55,999 INFO L782 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 18 remaining) [2024-11-09 10:39:55,999 INFO L782 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 18 remaining) [2024-11-09 10:39:56,000 INFO L782 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 18 remaining) [2024-11-09 10:39:56,000 INFO L782 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 18 remaining) [2024-11-09 10:39:56,000 INFO L782 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 18 remaining) [2024-11-09 10:39:56,000 INFO L782 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 18 remaining) [2024-11-09 10:39:56,000 INFO L782 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 18 remaining) [2024-11-09 10:39:56,000 INFO L782 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 18 remaining) [2024-11-09 10:39:56,018 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-09 10:39:56,204 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-09 10:39:56,205 INFO L407 BasicCegarLoop]: Path program histogram: [3, 2, 2, 2, 1, 1, 1, 1] [2024-11-09 10:39:56,209 INFO L239 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-11-09 10:39:56,210 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2024-11-09 10:39:56,214 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.11 10:39:56 BasicIcfg [2024-11-09 10:39:56,214 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-09 10:39:56,214 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-09 10:39:56,214 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-09 10:39:56,215 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-09 10:39:56,215 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:39:34" (3/4) ... [2024-11-09 10:39:56,217 INFO L142 WitnessPrinter]: Generating witness for correct program [2024-11-09 10:39:56,219 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure t_fun [2024-11-09 10:39:56,224 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 83 nodes and edges [2024-11-09 10:39:56,224 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2024-11-09 10:39:56,224 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2024-11-09 10:39:56,224 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2024-11-09 10:39:56,315 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2024-11-09 10:39:56,316 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.yml [2024-11-09 10:39:56,316 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-09 10:39:56,316 INFO L158 Benchmark]: Toolchain (without parser) took 23642.03ms. Allocated memory was 188.7MB in the beginning and 979.4MB in the end (delta: 790.6MB). Free memory was 128.5MB in the beginning and 395.3MB in the end (delta: -266.8MB). Peak memory consumption was 523.5MB. Max. memory is 16.1GB. [2024-11-09 10:39:56,317 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 96.5MB. Free memory was 50.8MB in the beginning and 50.7MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-09 10:39:56,317 INFO L158 Benchmark]: CACSL2BoogieTranslator took 713.53ms. Allocated memory is still 188.7MB. Free memory was 128.1MB in the beginning and 142.1MB in the end (delta: -14.0MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2024-11-09 10:39:56,317 INFO L158 Benchmark]: Boogie Procedure Inliner took 75.98ms. Allocated memory is still 188.7MB. Free memory was 142.1MB in the beginning and 139.0MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-11-09 10:39:56,318 INFO L158 Benchmark]: Boogie Preprocessor took 73.86ms. Allocated memory is still 188.7MB. Free memory was 139.0MB in the beginning and 135.8MB in the end (delta: 3.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-11-09 10:39:56,318 INFO L158 Benchmark]: RCFGBuilder took 910.10ms. Allocated memory is still 188.7MB. Free memory was 135.8MB in the beginning and 155.7MB in the end (delta: -19.9MB). Peak memory consumption was 84.9MB. Max. memory is 16.1GB. [2024-11-09 10:39:56,318 INFO L158 Benchmark]: TraceAbstraction took 21760.80ms. Allocated memory was 188.7MB in the beginning and 979.4MB in the end (delta: 790.6MB). Free memory was 154.7MB in the beginning and 400.6MB in the end (delta: -245.9MB). Peak memory consumption was 544.7MB. Max. memory is 16.1GB. [2024-11-09 10:39:56,318 INFO L158 Benchmark]: Witness Printer took 101.68ms. Allocated memory is still 979.4MB. Free memory was 399.5MB in the beginning and 395.3MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-11-09 10:39:56,320 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 96.5MB. Free memory was 50.8MB in the beginning and 50.7MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 713.53ms. Allocated memory is still 188.7MB. Free memory was 128.1MB in the beginning and 142.1MB in the end (delta: -14.0MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 75.98ms. Allocated memory is still 188.7MB. Free memory was 142.1MB in the beginning and 139.0MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 73.86ms. Allocated memory is still 188.7MB. Free memory was 139.0MB in the beginning and 135.8MB in the end (delta: 3.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 910.10ms. Allocated memory is still 188.7MB. Free memory was 135.8MB in the beginning and 155.7MB in the end (delta: -19.9MB). Peak memory consumption was 84.9MB. Max. memory is 16.1GB. * TraceAbstraction took 21760.80ms. Allocated memory was 188.7MB in the beginning and 979.4MB in the end (delta: 790.6MB). Free memory was 154.7MB in the beginning and 400.6MB in the end (delta: -245.9MB). Peak memory consumption was 544.7MB. Max. memory is 16.1GB. * Witness Printer took 101.68ms. Allocated memory is still 979.4MB. Free memory was 399.5MB in the beginning and 395.3MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 931]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 3 procedures, 55 locations, 18 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 21.6s, OverallIterations: 13, TraceHistogramMax: 11, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 11.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2988 SdHoareTripleChecker+Valid, 5.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2835 mSDsluCounter, 822 SdHoareTripleChecker+Invalid, 4.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 798 mSDsCounter, 64 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 9547 IncrementalHoareTripleChecker+Invalid, 9611 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 64 mSolverCounterUnsat, 24 mSDtfsCounter, 9547 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 631 GetRequests, 439 SyntacticMatches, 0 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 974 ImplicationChecksByTransitivity, 2.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=476occurred in iteration=10, InterpolantAutomatonStates: 130, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 6.3s InterpolantComputationTime, 633 NumberOfCodeBlocks, 567 NumberOfCodeBlocksAsserted, 25 NumberOfCheckSat, 856 ConstructedInterpolants, 0 QuantifiedInterpolants, 9527 SizeOfPredicates, 33 NumberOfNonLiveVariables, 2243 ConjunctsInSsa, 123 ConjunctsInUnsatCore, 28 InterpolantComputations, 6 PerfectInterpolantSequences, 2005/2520 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 13 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-11-09 10:39:56,349 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE