./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/valid-memsafety.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/bigshot_s.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a046e57d Calling Ultimate with: /root/.sdkman/candidates/java/current/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 /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/bigshot_s.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 4d8c741fd238f074816319de9a9bd5d97cd9b35eb7f53a276be973ea0c31ecbe --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-mul-div-a046e57-m [2024-10-13 12:05:27,826 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-13 12:05:27,908 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-13 12:05:27,913 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-13 12:05:27,915 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-13 12:05:27,948 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-13 12:05:27,949 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-13 12:05:27,949 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-13 12:05:27,950 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-13 12:05:27,950 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-13 12:05:27,950 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-13 12:05:27,951 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-13 12:05:27,951 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-13 12:05:27,952 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-13 12:05:27,952 INFO L153 SettingsManager]: * Use SBE=true [2024-10-13 12:05:27,953 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-13 12:05:27,953 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-13 12:05:27,953 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-13 12:05:27,954 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-13 12:05:27,954 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-13 12:05:27,954 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-13 12:05:27,955 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-13 12:05:27,955 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-13 12:05:27,956 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-13 12:05:27,956 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-13 12:05:27,956 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-13 12:05:27,957 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-13 12:05:27,957 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-13 12:05:27,957 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-13 12:05:27,958 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-13 12:05:27,958 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-13 12:05:27,958 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-13 12:05:27,958 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-13 12:05:27,959 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 12:05:27,959 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-13 12:05:27,959 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-13 12:05:27,960 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-13 12:05:27,960 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-13 12:05:27,960 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-13 12:05:27,960 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-13 12:05:27,960 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-13 12:05:27,961 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-13 12:05:27,962 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4d8c741fd238f074816319de9a9bd5d97cd9b35eb7f53a276be973ea0c31ecbe [2024-10-13 12:05:28,244 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-13 12:05:28,272 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-13 12:05:28,276 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-13 12:05:28,277 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-13 12:05:28,278 INFO L274 PluginConnector]: CDTParser initialized [2024-10-13 12:05:28,279 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/bigshot_s.i [2024-10-13 12:05:29,857 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-13 12:05:30,139 INFO L384 CDTParser]: Found 1 translation units. [2024-10-13 12:05:30,140 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/bigshot_s.i [2024-10-13 12:05:30,172 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/decdd9ae5/531ea3108e084d5ca61694e6e6b92ed1/FLAG82bad3b10 [2024-10-13 12:05:30,453 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/decdd9ae5/531ea3108e084d5ca61694e6e6b92ed1 [2024-10-13 12:05:30,455 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-13 12:05:30,457 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-13 12:05:30,458 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-13 12:05:30,458 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-13 12:05:30,464 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-13 12:05:30,465 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:05:30" (1/1) ... [2024-10-13 12:05:30,466 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a56d807 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:05:30, skipping insertion in model container [2024-10-13 12:05:30,466 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:05:30" (1/1) ... [2024-10-13 12:05:30,521 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-13 12:05:31,047 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 12:05:31,064 INFO L200 MainTranslator]: Completed pre-run [2024-10-13 12:05:31,131 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 12:05:31,246 INFO L204 MainTranslator]: Completed translation [2024-10-13 12:05:31,247 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:05:31 WrapperNode [2024-10-13 12:05:31,248 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-13 12:05:31,249 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-13 12:05:31,249 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-13 12:05:31,250 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-13 12:05:31,258 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:05:31" (1/1) ... [2024-10-13 12:05:31,286 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:05:31" (1/1) ... [2024-10-13 12:05:31,318 INFO L138 Inliner]: procedures = 322, calls = 24, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 67 [2024-10-13 12:05:31,319 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-13 12:05:31,321 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-13 12:05:31,321 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-13 12:05:31,321 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-13 12:05:31,332 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:05:31" (1/1) ... [2024-10-13 12:05:31,333 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:05:31" (1/1) ... [2024-10-13 12:05:31,336 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:05:31" (1/1) ... [2024-10-13 12:05:31,367 INFO L175 MemorySlicer]: Split 13 memory accesses to 3 slices as follows [2, 9, 2]. 69 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 8, 0]. The 1 writes are split as follows [0, 0, 1]. [2024-10-13 12:05:31,367 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:05:31" (1/1) ... [2024-10-13 12:05:31,368 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:05:31" (1/1) ... [2024-10-13 12:05:31,376 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:05:31" (1/1) ... [2024-10-13 12:05:31,383 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:05:31" (1/1) ... [2024-10-13 12:05:31,386 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:05:31" (1/1) ... [2024-10-13 12:05:31,391 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:05:31" (1/1) ... [2024-10-13 12:05:31,397 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-13 12:05:31,398 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-13 12:05:31,398 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-13 12:05:31,398 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-13 12:05:31,400 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:05:31" (1/1) ... [2024-10-13 12:05:31,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 12:05:31,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 12:05:31,437 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) [2024-10-13 12:05:31,444 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 [2024-10-13 12:05:31,489 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#0 [2024-10-13 12:05:31,489 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#1 [2024-10-13 12:05:31,490 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#2 [2024-10-13 12:05:31,490 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-13 12:05:31,493 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-13 12:05:31,493 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-13 12:05:31,493 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-13 12:05:31,493 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-13 12:05:31,493 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-13 12:05:31,494 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-13 12:05:31,494 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-13 12:05:31,494 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-13 12:05:31,494 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-13 12:05:31,494 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-13 12:05:31,494 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-13 12:05:31,495 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-13 12:05:31,495 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-13 12:05:31,497 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-13 12:05:31,625 INFO L238 CfgBuilder]: Building ICFG [2024-10-13 12:05:31,628 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-13 12:05:31,836 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-13 12:05:31,837 INFO L287 CfgBuilder]: Performing block encoding [2024-10-13 12:05:31,933 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-13 12:05:31,934 INFO L314 CfgBuilder]: Removed 1 assume(true) statements. [2024-10-13 12:05:31,934 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:05:31 BoogieIcfgContainer [2024-10-13 12:05:31,935 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-13 12:05:31,939 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-13 12:05:31,940 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-13 12:05:31,944 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-13 12:05:31,944 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 12:05:30" (1/3) ... [2024-10-13 12:05:31,945 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ed975ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 12:05:31, skipping insertion in model container [2024-10-13 12:05:31,946 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:05:31" (2/3) ... [2024-10-13 12:05:31,948 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ed975ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 12:05:31, skipping insertion in model container [2024-10-13 12:05:31,948 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:05:31" (3/3) ... [2024-10-13 12:05:31,950 INFO L112 eAbstractionObserver]: Analyzing ICFG bigshot_s.i [2024-10-13 12:05:31,964 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-13 12:05:31,965 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2024-10-13 12:05:31,965 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-13 12:05:32,015 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-10-13 12:05:32,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 48 places, 47 transitions, 108 flow [2024-10-13 12:05:32,092 INFO L124 PetriNetUnfolderBase]: 6/45 cut-off events. [2024-10-13 12:05:32,092 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-13 12:05:32,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54 conditions, 45 events. 6/45 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 72 event pairs, 0 based on Foata normal form. 0/29 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2024-10-13 12:05:32,096 INFO L82 GeneralOperation]: Start removeDead. Operand has 48 places, 47 transitions, 108 flow [2024-10-13 12:05:32,102 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 45 places, 44 transitions, 100 flow [2024-10-13 12:05:32,116 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-13 12:05:32,126 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;@3aa0d815, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-13 12:05:32,127 INFO L334 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2024-10-13 12:05:32,137 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-13 12:05:32,141 INFO L124 PetriNetUnfolderBase]: 1/14 cut-off events. [2024-10-13 12:05:32,141 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-13 12:05:32,142 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:05:32,142 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:05:32,143 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-13 12:05:32,148 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:05:32,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1745696950, now seen corresponding path program 1 times [2024-10-13 12:05:32,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:05:32,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416960260] [2024-10-13 12:05:32,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:05:32,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:05:32,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:05:32,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:05:32,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:05:32,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416960260] [2024-10-13 12:05:32,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416960260] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:05:32,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:05:32,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-13 12:05:32,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668194813] [2024-10-13 12:05:32,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:05:32,703 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-13 12:05:32,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:05:32,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-13 12:05:32,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-13 12:05:32,822 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-10-13 12:05:32,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 44 transitions, 100 flow. Second operand has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 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) [2024-10-13 12:05:32,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:05:32,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-10-13 12:05:32,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:05:32,945 INFO L124 PetriNetUnfolderBase]: 11/60 cut-off events. [2024-10-13 12:05:32,945 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-13 12:05:32,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105 conditions, 60 events. 11/60 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 143 event pairs, 3 based on Foata normal form. 2/51 useless extension candidates. Maximal degree in co-relation 84. Up to 24 conditions per place. [2024-10-13 12:05:32,948 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 19 selfloop transitions, 3 changer transitions 0/39 dead transitions. [2024-10-13 12:05:32,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 39 transitions, 134 flow [2024-10-13 12:05:32,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-13 12:05:32,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-13 12:05:32,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 103 transitions. [2024-10-13 12:05:32,963 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5478723404255319 [2024-10-13 12:05:32,965 INFO L175 Difference]: Start difference. First operand has 45 places, 44 transitions, 100 flow. Second operand 4 states and 103 transitions. [2024-10-13 12:05:32,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 39 transitions, 134 flow [2024-10-13 12:05:32,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 39 transitions, 126 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-13 12:05:32,972 INFO L231 Difference]: Finished difference. Result has 41 places, 38 transitions, 86 flow [2024-10-13 12:05:32,973 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=86, PETRI_PLACES=41, PETRI_TRANSITIONS=38} [2024-10-13 12:05:32,978 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, -4 predicate places. [2024-10-13 12:05:32,978 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 38 transitions, 86 flow [2024-10-13 12:05:32,978 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 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) [2024-10-13 12:05:32,978 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:05:32,979 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:05:32,979 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-13 12:05:32,979 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-13 12:05:32,980 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:05:32,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1717969130, now seen corresponding path program 1 times [2024-10-13 12:05:32,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:05:32,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254434975] [2024-10-13 12:05:32,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:05:32,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:05:33,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:05:33,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:05:33,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:05:33,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254434975] [2024-10-13 12:05:33,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254434975] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:05:33,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:05:33,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-13 12:05:33,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480998987] [2024-10-13 12:05:33,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:05:33,277 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-13 12:05:33,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:05:33,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-13 12:05:33,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-13 12:05:33,371 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 47 [2024-10-13 12:05:33,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 38 transitions, 86 flow. Second operand has 5 states, 5 states have (on average 21.8) internal successors, (109), 5 states have internal predecessors, (109), 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) [2024-10-13 12:05:33,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:05:33,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 47 [2024-10-13 12:05:33,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:05:33,496 INFO L124 PetriNetUnfolderBase]: 16/76 cut-off events. [2024-10-13 12:05:33,499 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-10-13 12:05:33,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134 conditions, 76 events. 16/76 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 178 event pairs, 7 based on Foata normal form. 2/63 useless extension candidates. Maximal degree in co-relation 53. Up to 40 conditions per place. [2024-10-13 12:05:33,500 INFO L140 encePairwiseOnDemand]: 41/47 looper letters, 22 selfloop transitions, 4 changer transitions 0/42 dead transitions. [2024-10-13 12:05:33,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 42 transitions, 148 flow [2024-10-13 12:05:33,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-13 12:05:33,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-13 12:05:33,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 108 transitions. [2024-10-13 12:05:33,503 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.574468085106383 [2024-10-13 12:05:33,503 INFO L175 Difference]: Start difference. First operand has 41 places, 38 transitions, 86 flow. Second operand 4 states and 108 transitions. [2024-10-13 12:05:33,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 42 transitions, 148 flow [2024-10-13 12:05:33,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 42 transitions, 140 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-13 12:05:33,505 INFO L231 Difference]: Finished difference. Result has 42 places, 40 transitions, 103 flow [2024-10-13 12:05:33,506 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=103, PETRI_PLACES=42, PETRI_TRANSITIONS=40} [2024-10-13 12:05:33,506 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, -3 predicate places. [2024-10-13 12:05:33,506 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 40 transitions, 103 flow [2024-10-13 12:05:33,507 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.8) internal successors, (109), 5 states have internal predecessors, (109), 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) [2024-10-13 12:05:33,507 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:05:33,507 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:05:33,507 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-13 12:05:33,507 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-13 12:05:33,508 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:05:33,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1717435208, now seen corresponding path program 1 times [2024-10-13 12:05:33,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:05:33,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319757085] [2024-10-13 12:05:33,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:05:33,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:05:33,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:05:33,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:05:33,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:05:33,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319757085] [2024-10-13 12:05:33,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319757085] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:05:33,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:05:33,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-13 12:05:33,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830415046] [2024-10-13 12:05:33,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:05:33,595 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-13 12:05:33,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:05:33,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-13 12:05:33,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-13 12:05:33,628 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 47 [2024-10-13 12:05:33,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 40 transitions, 103 flow. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 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) [2024-10-13 12:05:33,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:05:33,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 47 [2024-10-13 12:05:33,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:05:33,699 INFO L124 PetriNetUnfolderBase]: 15/77 cut-off events. [2024-10-13 12:05:33,700 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2024-10-13 12:05:33,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145 conditions, 77 events. 15/77 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 176 event pairs, 1 based on Foata normal form. 0/70 useless extension candidates. Maximal degree in co-relation 49. Up to 20 conditions per place. [2024-10-13 12:05:33,701 INFO L140 encePairwiseOnDemand]: 42/47 looper letters, 19 selfloop transitions, 4 changer transitions 0/40 dead transitions. [2024-10-13 12:05:33,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 40 transitions, 149 flow [2024-10-13 12:05:33,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-13 12:05:33,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-13 12:05:33,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 107 transitions. [2024-10-13 12:05:33,703 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5691489361702128 [2024-10-13 12:05:33,703 INFO L175 Difference]: Start difference. First operand has 42 places, 40 transitions, 103 flow. Second operand 4 states and 107 transitions. [2024-10-13 12:05:33,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 40 transitions, 149 flow [2024-10-13 12:05:33,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 40 transitions, 144 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-13 12:05:33,706 INFO L231 Difference]: Finished difference. Result has 41 places, 38 transitions, 102 flow [2024-10-13 12:05:33,706 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=102, PETRI_PLACES=41, PETRI_TRANSITIONS=38} [2024-10-13 12:05:33,707 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, -4 predicate places. [2024-10-13 12:05:33,707 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 38 transitions, 102 flow [2024-10-13 12:05:33,707 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 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) [2024-10-13 12:05:33,707 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:05:33,707 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:05:33,707 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-13 12:05:33,708 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-13 12:05:33,708 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:05:33,708 INFO L85 PathProgramCache]: Analyzing trace with hash -850989204, now seen corresponding path program 1 times [2024-10-13 12:05:33,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:05:33,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004584645] [2024-10-13 12:05:33,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:05:33,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:05:33,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:05:33,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:05:33,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:05:33,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004584645] [2024-10-13 12:05:33,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004584645] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:05:33,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:05:33,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-13 12:05:33,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729837897] [2024-10-13 12:05:33,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:05:33,853 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-13 12:05:33,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:05:33,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-13 12:05:33,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-13 12:05:33,899 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 47 [2024-10-13 12:05:33,900 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 38 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 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) [2024-10-13 12:05:33,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:05:33,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 47 [2024-10-13 12:05:33,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:05:33,975 INFO L124 PetriNetUnfolderBase]: 14/66 cut-off events. [2024-10-13 12:05:33,975 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2024-10-13 12:05:33,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132 conditions, 66 events. 14/66 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 133 event pairs, 4 based on Foata normal form. 2/62 useless extension candidates. Maximal degree in co-relation 49. Up to 31 conditions per place. [2024-10-13 12:05:33,977 INFO L140 encePairwiseOnDemand]: 41/47 looper letters, 20 selfloop transitions, 4 changer transitions 0/40 dead transitions. [2024-10-13 12:05:33,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 40 transitions, 154 flow [2024-10-13 12:05:33,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-13 12:05:33,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-13 12:05:33,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 114 transitions. [2024-10-13 12:05:33,980 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6063829787234043 [2024-10-13 12:05:33,980 INFO L175 Difference]: Start difference. First operand has 41 places, 38 transitions, 102 flow. Second operand 4 states and 114 transitions. [2024-10-13 12:05:33,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 40 transitions, 154 flow [2024-10-13 12:05:33,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 40 transitions, 146 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-13 12:05:33,982 INFO L231 Difference]: Finished difference. Result has 41 places, 37 transitions, 105 flow [2024-10-13 12:05:33,984 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=105, PETRI_PLACES=41, PETRI_TRANSITIONS=37} [2024-10-13 12:05:33,985 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, -4 predicate places. [2024-10-13 12:05:33,986 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 37 transitions, 105 flow [2024-10-13 12:05:33,986 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 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) [2024-10-13 12:05:33,987 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:05:33,987 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:05:33,987 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-13 12:05:33,988 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-13 12:05:33,988 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:05:33,989 INFO L85 PathProgramCache]: Analyzing trace with hash -391476111, now seen corresponding path program 1 times [2024-10-13 12:05:33,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:05:33,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517695846] [2024-10-13 12:05:33,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:05:33,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:05:34,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:05:34,157 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:05:34,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:05:34,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517695846] [2024-10-13 12:05:34,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517695846] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 12:05:34,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187752215] [2024-10-13 12:05:34,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:05:34,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 12:05:34,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 12:05:34,161 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) [2024-10-13 12:05:34,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-13 12:05:34,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:05:34,247 INFO L255 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-13 12:05:34,252 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:05:34,362 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-10-13 12:05:34,363 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-10-13 12:05:34,389 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-13 12:05:34,389 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-10-13 12:05:34,545 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:05:34,545 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 12:05:34,735 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:05:34,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187752215] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 12:05:34,736 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 12:05:34,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2024-10-13 12:05:34,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259929393] [2024-10-13 12:05:34,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 12:05:34,737 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-13 12:05:34,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:05:34,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-13 12:05:34,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2024-10-13 12:05:35,018 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 47 [2024-10-13 12:05:35,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 37 transitions, 105 flow. Second operand has 14 states, 14 states have (on average 21.0) internal successors, (294), 14 states have internal predecessors, (294), 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) [2024-10-13 12:05:35,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:05:35,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 47 [2024-10-13 12:05:35,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:05:35,288 INFO L124 PetriNetUnfolderBase]: 33/126 cut-off events. [2024-10-13 12:05:35,289 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2024-10-13 12:05:35,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 259 conditions, 126 events. 33/126 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 221 event pairs, 6 based on Foata normal form. 12/135 useless extension candidates. Maximal degree in co-relation 95. Up to 38 conditions per place. [2024-10-13 12:05:35,291 INFO L140 encePairwiseOnDemand]: 40/47 looper letters, 32 selfloop transitions, 11 changer transitions 0/55 dead transitions. [2024-10-13 12:05:35,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 55 transitions, 233 flow [2024-10-13 12:05:35,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-13 12:05:35,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-13 12:05:35,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-10-13 12:05:35,293 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5319148936170213 [2024-10-13 12:05:35,294 INFO L175 Difference]: Start difference. First operand has 41 places, 37 transitions, 105 flow. Second operand 7 states and 175 transitions. [2024-10-13 12:05:35,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 55 transitions, 233 flow [2024-10-13 12:05:35,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 55 transitions, 225 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-13 12:05:35,296 INFO L231 Difference]: Finished difference. Result has 47 places, 41 transitions, 159 flow [2024-10-13 12:05:35,296 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=93, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=159, PETRI_PLACES=47, PETRI_TRANSITIONS=41} [2024-10-13 12:05:35,297 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, 2 predicate places. [2024-10-13 12:05:35,297 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 41 transitions, 159 flow [2024-10-13 12:05:35,298 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 21.0) internal successors, (294), 14 states have internal predecessors, (294), 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) [2024-10-13 12:05:35,298 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:05:35,298 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:05:35,321 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-13 12:05:35,502 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 12:05:35,503 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-13 12:05:35,504 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:05:35,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1646348453, now seen corresponding path program 1 times [2024-10-13 12:05:35,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:05:35,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714963936] [2024-10-13 12:05:35,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:05:35,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:05:35,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:05:35,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:05:35,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:05:35,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714963936] [2024-10-13 12:05:35,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714963936] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:05:35,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:05:35,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-13 12:05:35,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120314646] [2024-10-13 12:05:35,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:05:35,540 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 12:05:35,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:05:35,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 12:05:35,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 12:05:35,553 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 47 [2024-10-13 12:05:35,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 41 transitions, 159 flow. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 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) [2024-10-13 12:05:35,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:05:35,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 47 [2024-10-13 12:05:35,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:05:35,601 INFO L124 PetriNetUnfolderBase]: 21/109 cut-off events. [2024-10-13 12:05:35,601 INFO L125 PetriNetUnfolderBase]: For 101/101 co-relation queries the response was YES. [2024-10-13 12:05:35,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 254 conditions, 109 events. 21/109 cut-off events. For 101/101 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 206 event pairs, 11 based on Foata normal form. 1/106 useless extension candidates. Maximal degree in co-relation 171. Up to 51 conditions per place. [2024-10-13 12:05:35,603 INFO L140 encePairwiseOnDemand]: 45/47 looper letters, 24 selfloop transitions, 1 changer transitions 0/41 dead transitions. [2024-10-13 12:05:35,603 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 41 transitions, 209 flow [2024-10-13 12:05:35,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 12:05:35,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 12:05:35,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 89 transitions. [2024-10-13 12:05:35,605 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6312056737588653 [2024-10-13 12:05:35,605 INFO L175 Difference]: Start difference. First operand has 47 places, 41 transitions, 159 flow. Second operand 3 states and 89 transitions. [2024-10-13 12:05:35,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 41 transitions, 209 flow [2024-10-13 12:05:35,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 41 transitions, 193 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-10-13 12:05:35,609 INFO L231 Difference]: Finished difference. Result has 47 places, 40 transitions, 143 flow [2024-10-13 12:05:35,609 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=141, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=143, PETRI_PLACES=47, PETRI_TRANSITIONS=40} [2024-10-13 12:05:35,612 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, 2 predicate places. [2024-10-13 12:05:35,612 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 40 transitions, 143 flow [2024-10-13 12:05:35,613 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 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) [2024-10-13 12:05:35,613 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:05:35,613 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:05:35,613 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-13 12:05:35,614 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-13 12:05:35,614 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:05:35,614 INFO L85 PathProgramCache]: Analyzing trace with hash 1748588019, now seen corresponding path program 1 times [2024-10-13 12:05:35,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:05:35,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187471609] [2024-10-13 12:05:35,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:05:35,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:05:35,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:05:35,787 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:05:35,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:05:35,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187471609] [2024-10-13 12:05:35,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187471609] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 12:05:35,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182774276] [2024-10-13 12:05:35,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:05:35,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 12:05:35,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 12:05:35,791 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) [2024-10-13 12:05:35,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-13 12:05:35,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:05:35,877 INFO L255 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-13 12:05:35,881 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:05:35,891 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-10-13 12:05:36,017 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:05:36,017 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 12:05:36,142 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:05:36,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182774276] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 12:05:36,143 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 12:05:36,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2024-10-13 12:05:36,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062519986] [2024-10-13 12:05:36,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 12:05:36,144 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-13 12:05:36,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:05:36,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-13 12:05:36,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-10-13 12:05:36,285 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 47 [2024-10-13 12:05:36,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 40 transitions, 143 flow. Second operand has 11 states, 11 states have (on average 23.727272727272727) internal successors, (261), 11 states have internal predecessors, (261), 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) [2024-10-13 12:05:36,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:05:36,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 47 [2024-10-13 12:05:36,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:05:36,463 INFO L124 PetriNetUnfolderBase]: 26/115 cut-off events. [2024-10-13 12:05:36,464 INFO L125 PetriNetUnfolderBase]: For 60/60 co-relation queries the response was YES. [2024-10-13 12:05:36,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 256 conditions, 115 events. 26/115 cut-off events. For 60/60 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 190 event pairs, 4 based on Foata normal form. 6/117 useless extension candidates. Maximal degree in co-relation 231. Up to 30 conditions per place. [2024-10-13 12:05:36,465 INFO L140 encePairwiseOnDemand]: 41/47 looper letters, 27 selfloop transitions, 11 changer transitions 0/52 dead transitions. [2024-10-13 12:05:36,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 52 transitions, 243 flow [2024-10-13 12:05:36,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-13 12:05:36,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-13 12:05:36,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 188 transitions. [2024-10-13 12:05:36,468 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-10-13 12:05:36,468 INFO L175 Difference]: Start difference. First operand has 47 places, 40 transitions, 143 flow. Second operand 7 states and 188 transitions. [2024-10-13 12:05:36,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 52 transitions, 243 flow [2024-10-13 12:05:36,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 52 transitions, 242 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-13 12:05:36,471 INFO L231 Difference]: Finished difference. Result has 56 places, 41 transitions, 192 flow [2024-10-13 12:05:36,472 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=192, PETRI_PLACES=56, PETRI_TRANSITIONS=41} [2024-10-13 12:05:36,473 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, 11 predicate places. [2024-10-13 12:05:36,473 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 41 transitions, 192 flow [2024-10-13 12:05:36,473 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 23.727272727272727) internal successors, (261), 11 states have internal predecessors, (261), 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) [2024-10-13 12:05:36,473 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:05:36,473 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:05:36,491 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-13 12:05:36,674 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,SelfDestructingSolverStorable6 [2024-10-13 12:05:36,675 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-13 12:05:36,675 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:05:36,675 INFO L85 PathProgramCache]: Analyzing trace with hash 177837018, now seen corresponding path program 1 times [2024-10-13 12:05:36,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:05:36,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816881244] [2024-10-13 12:05:36,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:05:36,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:05:36,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:05:36,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:05:36,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:05:36,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816881244] [2024-10-13 12:05:36,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816881244] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:05:36,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:05:36,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-13 12:05:36,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534553388] [2024-10-13 12:05:36,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:05:36,740 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-13 12:05:36,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:05:36,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-13 12:05:36,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-13 12:05:36,759 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 47 [2024-10-13 12:05:36,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 41 transitions, 192 flow. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 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) [2024-10-13 12:05:36,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:05:36,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 47 [2024-10-13 12:05:36,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:05:36,816 INFO L124 PetriNetUnfolderBase]: 20/108 cut-off events. [2024-10-13 12:05:36,816 INFO L125 PetriNetUnfolderBase]: For 184/184 co-relation queries the response was YES. [2024-10-13 12:05:36,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 294 conditions, 108 events. 20/108 cut-off events. For 184/184 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 183 event pairs, 11 based on Foata normal form. 0/105 useless extension candidates. Maximal degree in co-relation 263. Up to 51 conditions per place. [2024-10-13 12:05:36,819 INFO L140 encePairwiseOnDemand]: 43/47 looper letters, 24 selfloop transitions, 3 changer transitions 0/41 dead transitions. [2024-10-13 12:05:36,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 41 transitions, 246 flow [2024-10-13 12:05:36,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-13 12:05:36,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-13 12:05:36,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 102 transitions. [2024-10-13 12:05:36,821 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5425531914893617 [2024-10-13 12:05:36,821 INFO L175 Difference]: Start difference. First operand has 56 places, 41 transitions, 192 flow. Second operand 4 states and 102 transitions. [2024-10-13 12:05:36,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 41 transitions, 246 flow [2024-10-13 12:05:36,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 41 transitions, 232 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-10-13 12:05:36,826 INFO L231 Difference]: Finished difference. Result has 54 places, 40 transitions, 182 flow [2024-10-13 12:05:36,826 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=51, 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=182, PETRI_PLACES=54, PETRI_TRANSITIONS=40} [2024-10-13 12:05:36,826 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, 9 predicate places. [2024-10-13 12:05:36,826 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 40 transitions, 182 flow [2024-10-13 12:05:36,827 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 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) [2024-10-13 12:05:36,827 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:05:36,827 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:05:36,827 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-10-13 12:05:36,827 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-13 12:05:36,828 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:05:36,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1253845180, now seen corresponding path program 1 times [2024-10-13 12:05:36,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:05:36,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978957318] [2024-10-13 12:05:36,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:05:36,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:05:36,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:05:37,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:05:37,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:05:37,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978957318] [2024-10-13 12:05:37,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978957318] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:05:37,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:05:37,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-13 12:05:37,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956409680] [2024-10-13 12:05:37,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:05:37,012 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-13 12:05:37,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:05:37,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-13 12:05:37,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-13 12:05:37,036 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 47 [2024-10-13 12:05:37,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 40 transitions, 182 flow. Second operand has 5 states, 5 states have (on average 26.4) internal successors, (132), 5 states have internal predecessors, (132), 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) [2024-10-13 12:05:37,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:05:37,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 47 [2024-10-13 12:05:37,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:05:37,132 INFO L124 PetriNetUnfolderBase]: 21/112 cut-off events. [2024-10-13 12:05:37,132 INFO L125 PetriNetUnfolderBase]: For 98/98 co-relation queries the response was YES. [2024-10-13 12:05:37,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 291 conditions, 112 events. 21/112 cut-off events. For 98/98 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 185 event pairs, 12 based on Foata normal form. 2/113 useless extension candidates. Maximal degree in co-relation 258. Up to 52 conditions per place. [2024-10-13 12:05:37,133 INFO L140 encePairwiseOnDemand]: 42/47 looper letters, 24 selfloop transitions, 5 changer transitions 0/44 dead transitions. [2024-10-13 12:05:37,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 44 transitions, 241 flow [2024-10-13 12:05:37,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-13 12:05:37,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-13 12:05:37,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 164 transitions. [2024-10-13 12:05:37,135 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5815602836879432 [2024-10-13 12:05:37,135 INFO L175 Difference]: Start difference. First operand has 54 places, 40 transitions, 182 flow. Second operand 6 states and 164 transitions. [2024-10-13 12:05:37,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 44 transitions, 241 flow [2024-10-13 12:05:37,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 44 transitions, 235 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-13 12:05:37,139 INFO L231 Difference]: Finished difference. Result has 57 places, 41 transitions, 187 flow [2024-10-13 12:05:37,140 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=167, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=187, PETRI_PLACES=57, PETRI_TRANSITIONS=41} [2024-10-13 12:05:37,141 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, 12 predicate places. [2024-10-13 12:05:37,141 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 41 transitions, 187 flow [2024-10-13 12:05:37,141 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.4) internal successors, (132), 5 states have internal predecessors, (132), 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) [2024-10-13 12:05:37,142 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:05:37,142 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:05:37,142 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-10-13 12:05:37,142 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-13 12:05:37,143 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:05:37,144 INFO L85 PathProgramCache]: Analyzing trace with hash -147733591, now seen corresponding path program 1 times [2024-10-13 12:05:37,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:05:37,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481725002] [2024-10-13 12:05:37,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:05:37,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:05:37,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:05:37,406 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:05:37,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:05:37,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481725002] [2024-10-13 12:05:37,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481725002] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 12:05:37,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784675115] [2024-10-13 12:05:37,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:05:37,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 12:05:37,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 12:05:37,409 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) [2024-10-13 12:05:37,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-13 12:05:37,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:05:37,494 INFO L255 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-13 12:05:37,495 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:05:37,635 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-10-13 12:05:37,648 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:05:37,649 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 12:05:37,721 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:05:37,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784675115] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 12:05:37,721 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 12:05:37,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2024-10-13 12:05:37,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397841643] [2024-10-13 12:05:37,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 12:05:37,723 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-13 12:05:37,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:05:37,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-13 12:05:37,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2024-10-13 12:05:37,914 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 47 [2024-10-13 12:05:37,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 41 transitions, 187 flow. Second operand has 14 states, 14 states have (on average 26.214285714285715) internal successors, (367), 14 states have internal predecessors, (367), 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) [2024-10-13 12:05:37,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:05:37,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 47 [2024-10-13 12:05:37,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:05:38,091 INFO L124 PetriNetUnfolderBase]: 18/107 cut-off events. [2024-10-13 12:05:38,091 INFO L125 PetriNetUnfolderBase]: For 111/111 co-relation queries the response was YES. [2024-10-13 12:05:38,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 289 conditions, 107 events. 18/107 cut-off events. For 111/111 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 176 event pairs, 9 based on Foata normal form. 2/108 useless extension candidates. Maximal degree in co-relation 258. Up to 41 conditions per place. [2024-10-13 12:05:38,093 INFO L140 encePairwiseOnDemand]: 42/47 looper letters, 24 selfloop transitions, 6 changer transitions 0/45 dead transitions. [2024-10-13 12:05:38,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 45 transitions, 250 flow [2024-10-13 12:05:38,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-13 12:05:38,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-13 12:05:38,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 190 transitions. [2024-10-13 12:05:38,097 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5775075987841946 [2024-10-13 12:05:38,097 INFO L175 Difference]: Start difference. First operand has 57 places, 41 transitions, 187 flow. Second operand 7 states and 190 transitions. [2024-10-13 12:05:38,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 45 transitions, 250 flow [2024-10-13 12:05:38,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 45 transitions, 247 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-13 12:05:38,100 INFO L231 Difference]: Finished difference. Result has 63 places, 41 transitions, 199 flow [2024-10-13 12:05:38,100 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=175, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=199, PETRI_PLACES=63, PETRI_TRANSITIONS=41} [2024-10-13 12:05:38,102 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, 18 predicate places. [2024-10-13 12:05:38,103 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 41 transitions, 199 flow [2024-10-13 12:05:38,103 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 26.214285714285715) internal successors, (367), 14 states have internal predecessors, (367), 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) [2024-10-13 12:05:38,103 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:05:38,103 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:05:38,123 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-13 12:05:38,304 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 12:05:38,304 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-13 12:05:38,305 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:05:38,305 INFO L85 PathProgramCache]: Analyzing trace with hash -485710670, now seen corresponding path program 2 times [2024-10-13 12:05:38,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:05:38,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064576377] [2024-10-13 12:05:38,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:05:38,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:05:38,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:05:38,589 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:05:38,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:05:38,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064576377] [2024-10-13 12:05:38,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064576377] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 12:05:38,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480063189] [2024-10-13 12:05:38,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 12:05:38,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 12:05:38,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 12:05:38,594 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) [2024-10-13 12:05:38,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-13 12:05:38,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 12:05:38,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 12:05:38,684 INFO L255 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-10-13 12:05:38,686 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:05:38,719 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-13 12:05:38,720 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-10-13 12:05:38,725 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-10-13 12:05:39,084 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:05:39,085 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 12:05:39,430 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:05:39,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480063189] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 12:05:39,430 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 12:05:39,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 21 [2024-10-13 12:05:39,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050031140] [2024-10-13 12:05:39,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 12:05:39,431 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-10-13 12:05:39,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:05:39,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-10-13 12:05:39,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2024-10-13 12:05:40,085 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 47 [2024-10-13 12:05:40,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 41 transitions, 199 flow. Second operand has 23 states, 23 states have (on average 21.391304347826086) internal successors, (492), 23 states have internal predecessors, (492), 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) [2024-10-13 12:05:40,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:05:40,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 47 [2024-10-13 12:05:40,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:05:40,564 INFO L124 PetriNetUnfolderBase]: 50/197 cut-off events. [2024-10-13 12:05:40,565 INFO L125 PetriNetUnfolderBase]: For 361/361 co-relation queries the response was YES. [2024-10-13 12:05:40,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 622 conditions, 197 events. 50/197 cut-off events. For 361/361 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 315 event pairs, 6 based on Foata normal form. 8/204 useless extension candidates. Maximal degree in co-relation 588. Up to 40 conditions per place. [2024-10-13 12:05:40,566 INFO L140 encePairwiseOnDemand]: 41/47 looper letters, 47 selfloop transitions, 17 changer transitions 0/76 dead transitions. [2024-10-13 12:05:40,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 76 transitions, 487 flow [2024-10-13 12:05:40,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-13 12:05:40,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-10-13 12:05:40,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 266 transitions. [2024-10-13 12:05:40,568 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5145067698259188 [2024-10-13 12:05:40,569 INFO L175 Difference]: Start difference. First operand has 63 places, 41 transitions, 199 flow. Second operand 11 states and 266 transitions. [2024-10-13 12:05:40,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 76 transitions, 487 flow [2024-10-13 12:05:40,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 76 transitions, 475 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-10-13 12:05:40,572 INFO L231 Difference]: Finished difference. Result has 73 places, 50 transitions, 331 flow [2024-10-13 12:05:40,572 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=187, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=331, PETRI_PLACES=73, PETRI_TRANSITIONS=50} [2024-10-13 12:05:40,573 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, 28 predicate places. [2024-10-13 12:05:40,573 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 50 transitions, 331 flow [2024-10-13 12:05:40,574 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 21.391304347826086) internal successors, (492), 23 states have internal predecessors, (492), 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) [2024-10-13 12:05:40,574 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:05:40,574 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:05:40,595 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-10-13 12:05:40,778 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 12:05:40,779 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-13 12:05:40,779 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:05:40,779 INFO L85 PathProgramCache]: Analyzing trace with hash 1383490036, now seen corresponding path program 2 times [2024-10-13 12:05:40,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:05:40,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749776221] [2024-10-13 12:05:40,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:05:40,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:05:40,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:05:41,036 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:05:41,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:05:41,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749776221] [2024-10-13 12:05:41,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749776221] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 12:05:41,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519798968] [2024-10-13 12:05:41,037 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 12:05:41,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 12:05:41,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 12:05:41,040 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) [2024-10-13 12:05:41,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-13 12:05:41,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-10-13 12:05:41,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 12:05:41,119 INFO L255 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-10-13 12:05:41,121 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:05:41,156 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-13 12:05:41,157 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-10-13 12:05:41,165 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-10-13 12:05:41,629 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-10-13 12:05:41,629 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 12:05:42,128 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-10-13 12:05:42,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519798968] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 12:05:42,129 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 12:05:42,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 4] total 15 [2024-10-13 12:05:42,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369334244] [2024-10-13 12:05:42,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 12:05:42,131 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-13 12:05:42,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:05:42,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-13 12:05:42,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2024-10-13 12:05:42,570 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2024-10-13 12:05:42,572 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 50 transitions, 331 flow. Second operand has 16 states, 16 states have (on average 22.8125) internal successors, (365), 16 states have internal predecessors, (365), 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) [2024-10-13 12:05:42,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:05:42,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2024-10-13 12:05:42,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:05:43,182 INFO L124 PetriNetUnfolderBase]: 57/196 cut-off events. [2024-10-13 12:05:43,182 INFO L125 PetriNetUnfolderBase]: For 583/583 co-relation queries the response was YES. [2024-10-13 12:05:43,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 673 conditions, 196 events. 57/196 cut-off events. For 583/583 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 277 event pairs, 2 based on Foata normal form. 8/203 useless extension candidates. Maximal degree in co-relation 632. Up to 45 conditions per place. [2024-10-13 12:05:43,184 INFO L140 encePairwiseOnDemand]: 40/47 looper letters, 45 selfloop transitions, 25 changer transitions 0/80 dead transitions. [2024-10-13 12:05:43,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 80 transitions, 557 flow [2024-10-13 12:05:43,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-13 12:05:43,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-10-13 12:05:43,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 390 transitions. [2024-10-13 12:05:43,187 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4881101376720901 [2024-10-13 12:05:43,187 INFO L175 Difference]: Start difference. First operand has 73 places, 50 transitions, 331 flow. Second operand 17 states and 390 transitions. [2024-10-13 12:05:43,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 80 transitions, 557 flow [2024-10-13 12:05:43,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 80 transitions, 529 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-10-13 12:05:43,192 INFO L231 Difference]: Finished difference. Result has 80 places, 54 transitions, 370 flow [2024-10-13 12:05:43,192 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=370, PETRI_PLACES=80, PETRI_TRANSITIONS=54} [2024-10-13 12:05:43,195 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, 35 predicate places. [2024-10-13 12:05:43,195 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 54 transitions, 370 flow [2024-10-13 12:05:43,196 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 22.8125) internal successors, (365), 16 states have internal predecessors, (365), 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) [2024-10-13 12:05:43,197 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:05:43,197 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:05:43,215 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-13 12:05:43,398 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-10-13 12:05:43,399 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-13 12:05:43,399 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:05:43,399 INFO L85 PathProgramCache]: Analyzing trace with hash 1894038446, now seen corresponding path program 2 times [2024-10-13 12:05:43,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:05:43,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918964851] [2024-10-13 12:05:43,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:05:43,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:05:43,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:05:43,607 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:05:43,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:05:43,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918964851] [2024-10-13 12:05:43,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918964851] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 12:05:43,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45001044] [2024-10-13 12:05:43,608 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 12:05:43,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 12:05:43,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 12:05:43,611 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) [2024-10-13 12:05:43,612 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-13 12:05:43,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 12:05:43,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 12:05:43,705 INFO L255 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-13 12:05:43,707 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:05:43,877 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-10-13 12:05:43,888 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:05:43,888 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 12:05:44,002 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:05:44,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45001044] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 12:05:44,002 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 12:05:44,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2024-10-13 12:05:44,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354288308] [2024-10-13 12:05:44,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 12:05:44,003 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-13 12:05:44,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:05:44,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-13 12:05:44,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2024-10-13 12:05:44,244 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 47 [2024-10-13 12:05:44,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 54 transitions, 370 flow. Second operand has 17 states, 17 states have (on average 25.88235294117647) internal successors, (440), 17 states have internal predecessors, (440), 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) [2024-10-13 12:05:44,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:05:44,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 47 [2024-10-13 12:05:44,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:05:44,447 INFO L124 PetriNetUnfolderBase]: 35/172 cut-off events. [2024-10-13 12:05:44,447 INFO L125 PetriNetUnfolderBase]: For 556/556 co-relation queries the response was YES. [2024-10-13 12:05:44,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 584 conditions, 172 events. 35/172 cut-off events. For 556/556 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 251 event pairs, 18 based on Foata normal form. 2/173 useless extension candidates. Maximal degree in co-relation 544. Up to 74 conditions per place. [2024-10-13 12:05:44,449 INFO L140 encePairwiseOnDemand]: 42/47 looper letters, 32 selfloop transitions, 7 changer transitions 0/59 dead transitions. [2024-10-13 12:05:44,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 59 transitions, 452 flow [2024-10-13 12:05:44,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-13 12:05:44,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-13 12:05:44,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 216 transitions. [2024-10-13 12:05:44,450 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.574468085106383 [2024-10-13 12:05:44,450 INFO L175 Difference]: Start difference. First operand has 80 places, 54 transitions, 370 flow. Second operand 8 states and 216 transitions. [2024-10-13 12:05:44,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 59 transitions, 452 flow [2024-10-13 12:05:44,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 59 transitions, 386 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-10-13 12:05:44,455 INFO L231 Difference]: Finished difference. Result has 79 places, 54 transitions, 320 flow [2024-10-13 12:05:44,455 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=70, 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=8, PETRI_FLOW=320, PETRI_PLACES=79, PETRI_TRANSITIONS=54} [2024-10-13 12:05:44,456 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, 34 predicate places. [2024-10-13 12:05:44,456 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 54 transitions, 320 flow [2024-10-13 12:05:44,456 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 25.88235294117647) internal successors, (440), 17 states have internal predecessors, (440), 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) [2024-10-13 12:05:44,456 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:05:44,456 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:05:44,476 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-10-13 12:05:44,657 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 12:05:44,658 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-13 12:05:44,658 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:05:44,661 INFO L85 PathProgramCache]: Analyzing trace with hash 784914715, now seen corresponding path program 3 times [2024-10-13 12:05:44,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:05:44,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513737082] [2024-10-13 12:05:44,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:05:44,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:05:44,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:05:44,961 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:05:44,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:05:44,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513737082] [2024-10-13 12:05:44,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513737082] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 12:05:44,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804519899] [2024-10-13 12:05:44,962 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-13 12:05:44,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 12:05:44,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 12:05:44,964 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) [2024-10-13 12:05:44,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-13 12:05:45,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-10-13 12:05:45,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 12:05:45,057 INFO L255 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-13 12:05:45,058 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:05:45,291 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-10-13 12:05:45,300 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:05:45,300 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 12:05:45,409 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:05:45,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804519899] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 12:05:45,409 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 12:05:45,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2024-10-13 12:05:45,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808661896] [2024-10-13 12:05:45,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 12:05:45,410 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-13 12:05:45,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:05:45,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-13 12:05:45,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2024-10-13 12:05:45,758 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 47 [2024-10-13 12:05:45,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 54 transitions, 320 flow. Second operand has 20 states, 20 states have (on average 25.85) internal successors, (517), 20 states have internal predecessors, (517), 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) [2024-10-13 12:05:45,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:05:45,759 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 47 [2024-10-13 12:05:45,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:05:45,989 INFO L124 PetriNetUnfolderBase]: 32/167 cut-off events. [2024-10-13 12:05:45,989 INFO L125 PetriNetUnfolderBase]: For 406/406 co-relation queries the response was YES. [2024-10-13 12:05:45,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 530 conditions, 167 events. 32/167 cut-off events. For 406/406 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 240 event pairs, 15 based on Foata normal form. 2/168 useless extension candidates. Maximal degree in co-relation 494. Up to 63 conditions per place. [2024-10-13 12:05:45,990 INFO L140 encePairwiseOnDemand]: 42/47 looper letters, 32 selfloop transitions, 8 changer transitions 0/60 dead transitions. [2024-10-13 12:05:45,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 60 transitions, 411 flow [2024-10-13 12:05:45,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-13 12:05:45,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-13 12:05:45,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 242 transitions. [2024-10-13 12:05:45,992 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5721040189125296 [2024-10-13 12:05:45,992 INFO L175 Difference]: Start difference. First operand has 79 places, 54 transitions, 320 flow. Second operand 9 states and 242 transitions. [2024-10-13 12:05:45,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 60 transitions, 411 flow [2024-10-13 12:05:45,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 60 transitions, 395 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-10-13 12:05:45,995 INFO L231 Difference]: Finished difference. Result has 83 places, 54 transitions, 327 flow [2024-10-13 12:05:45,995 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=295, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=327, PETRI_PLACES=83, PETRI_TRANSITIONS=54} [2024-10-13 12:05:45,996 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, 38 predicate places. [2024-10-13 12:05:45,996 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 54 transitions, 327 flow [2024-10-13 12:05:45,997 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 25.85) internal successors, (517), 20 states have internal predecessors, (517), 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) [2024-10-13 12:05:45,997 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:05:45,997 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:05:46,016 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-10-13 12:05:46,197 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 12:05:46,198 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-13 12:05:46,198 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:05:46,199 INFO L85 PathProgramCache]: Analyzing trace with hash -1620704952, now seen corresponding path program 4 times [2024-10-13 12:05:46,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:05:46,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124263253] [2024-10-13 12:05:46,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:05:46,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:05:46,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:05:46,565 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:05:46,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:05:46,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124263253] [2024-10-13 12:05:46,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124263253] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 12:05:46,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63972267] [2024-10-13 12:05:46,566 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-13 12:05:46,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 12:05:46,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 12:05:46,568 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) [2024-10-13 12:05:46,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-13 12:05:46,661 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-13 12:05:46,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 12:05:46,663 INFO L255 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-13 12:05:46,665 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:05:46,920 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-10-13 12:05:46,931 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:05:46,931 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 12:05:47,067 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:05:47,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63972267] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 12:05:47,068 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 12:05:47,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2024-10-13 12:05:47,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719878509] [2024-10-13 12:05:47,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 12:05:47,068 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-10-13 12:05:47,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:05:47,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-10-13 12:05:47,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2024-10-13 12:05:47,490 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 47 [2024-10-13 12:05:47,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 54 transitions, 327 flow. Second operand has 23 states, 23 states have (on average 25.73913043478261) internal successors, (592), 23 states have internal predecessors, (592), 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) [2024-10-13 12:05:47,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:05:47,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 47 [2024-10-13 12:05:47,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:05:47,755 INFO L124 PetriNetUnfolderBase]: 29/162 cut-off events. [2024-10-13 12:05:47,755 INFO L125 PetriNetUnfolderBase]: For 448/448 co-relation queries the response was YES. [2024-10-13 12:05:47,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 524 conditions, 162 events. 29/162 cut-off events. For 448/448 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 231 event pairs, 12 based on Foata normal form. 2/163 useless extension candidates. Maximal degree in co-relation 486. Up to 52 conditions per place. [2024-10-13 12:05:47,757 INFO L140 encePairwiseOnDemand]: 42/47 looper letters, 32 selfloop transitions, 9 changer transitions 0/61 dead transitions. [2024-10-13 12:05:47,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 61 transitions, 423 flow [2024-10-13 12:05:47,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-13 12:05:47,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-10-13 12:05:47,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 268 transitions. [2024-10-13 12:05:47,759 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5702127659574469 [2024-10-13 12:05:47,759 INFO L175 Difference]: Start difference. First operand has 83 places, 54 transitions, 327 flow. Second operand 10 states and 268 transitions. [2024-10-13 12:05:47,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 61 transitions, 423 flow [2024-10-13 12:05:47,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 61 transitions, 403 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-10-13 12:05:47,762 INFO L231 Difference]: Finished difference. Result has 87 places, 54 transitions, 333 flow [2024-10-13 12:05:47,763 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=297, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=333, PETRI_PLACES=87, PETRI_TRANSITIONS=54} [2024-10-13 12:05:47,763 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, 42 predicate places. [2024-10-13 12:05:47,763 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 54 transitions, 333 flow [2024-10-13 12:05:47,764 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 25.73913043478261) internal successors, (592), 23 states have internal predecessors, (592), 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) [2024-10-13 12:05:47,764 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:05:47,764 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:05:47,778 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-10-13 12:05:47,964 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,SelfDestructingSolverStorable14 [2024-10-13 12:05:47,965 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-13 12:05:47,965 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:05:47,965 INFO L85 PathProgramCache]: Analyzing trace with hash -854395871, now seen corresponding path program 5 times [2024-10-13 12:05:47,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:05:47,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54081629] [2024-10-13 12:05:47,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:05:47,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:05:47,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:05:48,336 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:05:48,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:05:48,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54081629] [2024-10-13 12:05:48,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54081629] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 12:05:48,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194735589] [2024-10-13 12:05:48,337 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-13 12:05:48,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 12:05:48,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 12:05:48,339 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 12:05:48,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-13 12:05:48,445 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-10-13 12:05:48,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 12:05:48,447 INFO L255 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-13 12:05:48,449 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:05:48,812 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-10-13 12:05:48,829 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:05:48,829 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 12:05:49,010 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:05:49,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194735589] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 12:05:49,011 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 12:05:49,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2024-10-13 12:05:49,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815529987] [2024-10-13 12:05:49,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 12:05:49,013 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-10-13 12:05:49,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:05:49,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-10-13 12:05:49,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2024-10-13 12:05:49,730 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 47 [2024-10-13 12:05:49,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 54 transitions, 333 flow. Second operand has 26 states, 26 states have (on average 25.653846153846153) internal successors, (667), 26 states have internal predecessors, (667), 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) [2024-10-13 12:05:49,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:05:49,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 47 [2024-10-13 12:05:49,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:05:50,070 INFO L124 PetriNetUnfolderBase]: 26/157 cut-off events. [2024-10-13 12:05:50,070 INFO L125 PetriNetUnfolderBase]: For 465/465 co-relation queries the response was YES. [2024-10-13 12:05:50,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 510 conditions, 157 events. 26/157 cut-off events. For 465/465 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 200 event pairs, 9 based on Foata normal form. 2/158 useless extension candidates. Maximal degree in co-relation 470. Up to 41 conditions per place. [2024-10-13 12:05:50,072 INFO L140 encePairwiseOnDemand]: 42/47 looper letters, 32 selfloop transitions, 10 changer transitions 0/62 dead transitions. [2024-10-13 12:05:50,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 62 transitions, 434 flow [2024-10-13 12:05:50,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-13 12:05:50,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-10-13 12:05:50,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 294 transitions. [2024-10-13 12:05:50,074 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5686653771760155 [2024-10-13 12:05:50,074 INFO L175 Difference]: Start difference. First operand has 87 places, 54 transitions, 333 flow. Second operand 11 states and 294 transitions. [2024-10-13 12:05:50,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 62 transitions, 434 flow [2024-10-13 12:05:50,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 62 transitions, 410 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-10-13 12:05:50,082 INFO L231 Difference]: Finished difference. Result has 91 places, 54 transitions, 338 flow [2024-10-13 12:05:50,083 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=298, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=338, PETRI_PLACES=91, PETRI_TRANSITIONS=54} [2024-10-13 12:05:50,083 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, 46 predicate places. [2024-10-13 12:05:50,084 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 54 transitions, 338 flow [2024-10-13 12:05:50,084 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 25.653846153846153) internal successors, (667), 26 states have internal predecessors, (667), 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) [2024-10-13 12:05:50,084 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:05:50,085 INFO L204 CegarLoopForPetriNet]: trace histogram [9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:05:50,100 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-10-13 12:05:50,285 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-10-13 12:05:50,285 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-13 12:05:50,286 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:05:50,286 INFO L85 PathProgramCache]: Analyzing trace with hash 791631438, now seen corresponding path program 3 times [2024-10-13 12:05:50,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:05:50,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600959066] [2024-10-13 12:05:50,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:05:50,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:05:50,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:05:50,744 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 16 proven. 168 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:05:50,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:05:50,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600959066] [2024-10-13 12:05:50,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600959066] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 12:05:50,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124797488] [2024-10-13 12:05:50,745 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-13 12:05:50,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 12:05:50,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 12:05:50,748 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 12:05:50,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-13 12:05:50,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-13 12:05:50,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 12:05:50,828 INFO L255 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-10-13 12:05:50,830 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:05:50,881 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-10-13 12:05:50,882 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-10-13 12:05:50,898 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-13 12:05:50,899 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-10-13 12:05:51,716 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 12:05:51,716 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2024-10-13 12:05:51,824 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 14 proven. 30 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2024-10-13 12:05:51,824 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 12:05:52,752 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2024-10-13 12:05:52,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124797488] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 12:05:52,753 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 12:05:52,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 25 [2024-10-13 12:05:52,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828694107] [2024-10-13 12:05:52,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 12:05:52,753 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-10-13 12:05:52,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:05:52,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-10-13 12:05:52,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2024-10-13 12:05:53,745 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 47 [2024-10-13 12:05:53,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 54 transitions, 338 flow. Second operand has 26 states, 26 states have (on average 21.384615384615383) internal successors, (556), 26 states have internal predecessors, (556), 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) [2024-10-13 12:05:53,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:05:53,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 47 [2024-10-13 12:05:53,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:05:55,051 INFO L124 PetriNetUnfolderBase]: 47/172 cut-off events. [2024-10-13 12:05:55,051 INFO L125 PetriNetUnfolderBase]: For 363/363 co-relation queries the response was YES. [2024-10-13 12:05:55,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 570 conditions, 172 events. 47/172 cut-off events. For 363/363 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 195 event pairs, 2 based on Foata normal form. 2/173 useless extension candidates. Maximal degree in co-relation 526. Up to 45 conditions per place. [2024-10-13 12:05:55,053 INFO L140 encePairwiseOnDemand]: 40/47 looper letters, 55 selfloop transitions, 21 changer transitions 0/84 dead transitions. [2024-10-13 12:05:55,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 84 transitions, 549 flow [2024-10-13 12:05:55,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-10-13 12:05:55,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-10-13 12:05:55,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 455 transitions. [2024-10-13 12:05:55,056 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.46099290780141844 [2024-10-13 12:05:55,056 INFO L175 Difference]: Start difference. First operand has 91 places, 54 transitions, 338 flow. Second operand 21 states and 455 transitions. [2024-10-13 12:05:55,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 84 transitions, 549 flow [2024-10-13 12:05:55,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 84 transitions, 483 flow, removed 7 selfloop flow, removed 19 redundant places. [2024-10-13 12:05:55,060 INFO L231 Difference]: Finished difference. Result has 91 places, 57 transitions, 305 flow [2024-10-13 12:05:55,061 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=305, PETRI_PLACES=91, PETRI_TRANSITIONS=57} [2024-10-13 12:05:55,061 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, 46 predicate places. [2024-10-13 12:05:55,061 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 57 transitions, 305 flow [2024-10-13 12:05:55,062 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 21.384615384615383) internal successors, (556), 26 states have internal predecessors, (556), 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) [2024-10-13 12:05:55,062 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:05:55,062 INFO L204 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:05:55,078 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-10-13 12:05:55,266 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-10-13 12:05:55,267 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-13 12:05:55,267 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:05:55,267 INFO L85 PathProgramCache]: Analyzing trace with hash 2086260882, now seen corresponding path program 6 times [2024-10-13 12:05:55,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:05:55,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357690806] [2024-10-13 12:05:55,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:05:55,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:05:55,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:05:55,735 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:05:55,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:05:55,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357690806] [2024-10-13 12:05:55,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357690806] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 12:05:55,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554059722] [2024-10-13 12:05:55,736 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-13 12:05:55,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 12:05:55,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 12:05:55,738 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 12:05:55,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-13 12:05:55,854 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-10-13 12:05:55,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 12:05:55,856 INFO L255 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-13 12:05:55,857 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:05:56,230 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-10-13 12:05:56,241 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:05:56,241 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 12:05:56,410 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:05:56,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554059722] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 12:05:56,410 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 12:05:56,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 28 [2024-10-13 12:05:56,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360452018] [2024-10-13 12:05:56,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 12:05:56,411 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-10-13 12:05:56,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:05:56,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-10-13 12:05:56,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2024-10-13 12:05:57,138 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 47 [2024-10-13 12:05:57,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 57 transitions, 305 flow. Second operand has 29 states, 29 states have (on average 25.517241379310345) internal successors, (740), 29 states have internal predecessors, (740), 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) [2024-10-13 12:05:57,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:05:57,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 47 [2024-10-13 12:05:57,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:05:57,590 INFO L124 PetriNetUnfolderBase]: 20/143 cut-off events. [2024-10-13 12:05:57,591 INFO L125 PetriNetUnfolderBase]: For 266/266 co-relation queries the response was YES. [2024-10-13 12:05:57,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 414 conditions, 143 events. 20/143 cut-off events. For 266/266 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 130 event pairs, 5 based on Foata normal form. 2/144 useless extension candidates. Maximal degree in co-relation 380. Up to 27 conditions per place. [2024-10-13 12:05:57,592 INFO L140 encePairwiseOnDemand]: 42/47 looper letters, 30 selfloop transitions, 11 changer transitions 0/65 dead transitions. [2024-10-13 12:05:57,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 65 transitions, 396 flow [2024-10-13 12:05:57,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-13 12:05:57,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-10-13 12:05:57,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 318 transitions. [2024-10-13 12:05:57,594 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5638297872340425 [2024-10-13 12:05:57,594 INFO L175 Difference]: Start difference. First operand has 91 places, 57 transitions, 305 flow. Second operand 12 states and 318 transitions. [2024-10-13 12:05:57,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 65 transitions, 396 flow [2024-10-13 12:05:57,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 65 transitions, 302 flow, removed 10 selfloop flow, removed 22 redundant places. [2024-10-13 12:05:57,597 INFO L231 Difference]: Finished difference. Result has 81 places, 56 transitions, 228 flow [2024-10-13 12:05:57,597 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=228, PETRI_PLACES=81, PETRI_TRANSITIONS=56} [2024-10-13 12:05:57,598 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, 36 predicate places. [2024-10-13 12:05:57,598 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 56 transitions, 228 flow [2024-10-13 12:05:57,598 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 25.517241379310345) internal successors, (740), 29 states have internal predecessors, (740), 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) [2024-10-13 12:05:57,598 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:05:57,599 INFO L204 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:05:57,616 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-10-13 12:05:57,799 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-10-13 12:05:57,799 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-13 12:05:57,800 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:05:57,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1714612845, now seen corresponding path program 7 times [2024-10-13 12:05:57,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:05:57,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21863412] [2024-10-13 12:05:57,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:05:57,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:05:57,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-13 12:05:57,830 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-13 12:05:57,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-13 12:05:57,892 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-13 12:05:57,892 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-13 12:05:57,894 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK (17 of 18 remaining) [2024-10-13 12:05:57,898 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE (16 of 18 remaining) [2024-10-13 12:05:57,898 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE (15 of 18 remaining) [2024-10-13 12:05:57,898 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (14 of 18 remaining) [2024-10-13 12:05:57,898 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (13 of 18 remaining) [2024-10-13 12:05:57,898 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 18 remaining) [2024-10-13 12:05:57,898 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 18 remaining) [2024-10-13 12:05:57,899 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 18 remaining) [2024-10-13 12:05:57,899 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 18 remaining) [2024-10-13 12:05:57,899 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (8 of 18 remaining) [2024-10-13 12:05:57,899 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 18 remaining) [2024-10-13 12:05:57,899 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 18 remaining) [2024-10-13 12:05:57,899 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE (5 of 18 remaining) [2024-10-13 12:05:57,899 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE (4 of 18 remaining) [2024-10-13 12:05:57,900 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (3 of 18 remaining) [2024-10-13 12:05:57,900 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (2 of 18 remaining) [2024-10-13 12:05:57,900 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 18 remaining) [2024-10-13 12:05:57,900 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 18 remaining) [2024-10-13 12:05:57,900 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-10-13 12:05:57,901 INFO L407 BasicCegarLoop]: Path program histogram: [7, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:05:57,977 INFO L234 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-10-13 12:05:57,977 INFO L165 ceAbstractionStarter]: Computing trace abstraction results [2024-10-13 12:05:57,981 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 12:05:57 BasicIcfg [2024-10-13 12:05:57,982 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-10-13 12:05:57,982 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-10-13 12:05:57,982 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-10-13 12:05:57,983 INFO L274 PluginConnector]: Witness Printer initialized [2024-10-13 12:05:57,983 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:05:31" (3/4) ... [2024-10-13 12:05:57,985 INFO L142 WitnessPrinter]: No result that supports witness generation found [2024-10-13 12:05:57,986 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-10-13 12:05:57,986 INFO L158 Benchmark]: Toolchain (without parser) took 27529.75ms. Allocated memory was 151.0MB in the beginning and 432.0MB in the end (delta: 281.0MB). Free memory was 93.7MB in the beginning and 283.9MB in the end (delta: -190.2MB). Peak memory consumption was 91.1MB. Max. memory is 16.1GB. [2024-10-13 12:05:57,987 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 151.0MB. Free memory is still 110.2MB. There was no memory consumed. Max. memory is 16.1GB. [2024-10-13 12:05:57,987 INFO L158 Benchmark]: CACSL2BoogieTranslator took 790.18ms. Allocated memory was 151.0MB in the beginning and 201.3MB in the end (delta: 50.3MB). Free memory was 93.4MB in the beginning and 157.6MB in the end (delta: -64.2MB). Peak memory consumption was 30.8MB. Max. memory is 16.1GB. [2024-10-13 12:05:57,987 INFO L158 Benchmark]: Boogie Procedure Inliner took 71.30ms. Allocated memory is still 201.3MB. Free memory was 157.6MB in the beginning and 154.4MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-10-13 12:05:57,987 INFO L158 Benchmark]: Boogie Preprocessor took 76.59ms. Allocated memory is still 201.3MB. Free memory was 154.4MB in the beginning and 152.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-10-13 12:05:57,988 INFO L158 Benchmark]: RCFGBuilder took 536.60ms. Allocated memory is still 201.3MB. Free memory was 152.3MB in the beginning and 126.1MB in the end (delta: 26.2MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2024-10-13 12:05:57,988 INFO L158 Benchmark]: TraceAbstraction took 26042.48ms. Allocated memory was 201.3MB in the beginning and 432.0MB in the end (delta: 230.7MB). Free memory was 125.0MB in the beginning and 284.9MB in the end (delta: -159.9MB). Peak memory consumption was 70.8MB. Max. memory is 16.1GB. [2024-10-13 12:05:57,988 INFO L158 Benchmark]: Witness Printer took 3.63ms. Allocated memory is still 432.0MB. Free memory was 284.9MB in the beginning and 283.9MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2024-10-13 12:05:57,991 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 151.0MB. Free memory is still 110.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 790.18ms. Allocated memory was 151.0MB in the beginning and 201.3MB in the end (delta: 50.3MB). Free memory was 93.4MB in the beginning and 157.6MB in the end (delta: -64.2MB). Peak memory consumption was 30.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 71.30ms. Allocated memory is still 201.3MB. Free memory was 157.6MB in the beginning and 154.4MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 76.59ms. Allocated memory is still 201.3MB. Free memory was 154.4MB in the beginning and 152.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 536.60ms. Allocated memory is still 201.3MB. Free memory was 152.3MB in the beginning and 126.1MB in the end (delta: 26.2MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * TraceAbstraction took 26042.48ms. Allocated memory was 201.3MB in the beginning and 432.0MB in the end (delta: 230.7MB). Free memory was 125.0MB in the beginning and 284.9MB in the end (delta: -159.9MB). Peak memory consumption was 70.8MB. Max. memory is 16.1GB. * Witness Printer took 3.63ms. Allocated memory is still 432.0MB. Free memory was 284.9MB in the beginning and 283.9MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 1119]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 1119. Possible FailurePath: [L1108] 0 char *v; [L1121] 0 pthread_t t1, t2; [L1122] FCALL, FORK 0 pthread_create(&t1, 0, thread1, 0) VAL [\old(arg)={0:0}, t1=-1, v={0:0}] [L1111] 1 v = malloc(sizeof(char) * 8) [L1112] 1 return 0; [L1123] FCALL, JOIN 1 pthread_join(t1, 0) VAL [\old(arg)={0:0}, \result={0:0}, arg={0:0}, t1=-1, v={-1:0}] [L1124] FCALL, FORK 0 pthread_create(&t2, 0, thread2, 0) VAL [\old(arg)={0:0}, \result={0:0}, arg={0:0}, t1=-1, t2=0, v={-1:0}] [L1116] COND TRUE 2 \read(*v) [L1116] CALL 2 strcpy(v, "Bigshot") [L1116] RET 2 strcpy(v, "Bigshot") [L1117] 2 return 0; [L1125] FCALL, JOIN 2 pthread_join(t2, 0) VAL [\old(arg)={0:0}, \result={0:0}, arg={0:0}, t1=-1, t2=0, v={-1:0}] [L1126] EXPR 0 !v || v[0] == 'B' VAL [\old(arg)={0:0}, \result={0:0}, arg={0:0}, t1=-1, t2=0, v={-1:0}] [L1126] EXPR 0 !v || v[0] == 'B' VAL [\old(arg)={0:0}, \result={0:0}, arg={0:0}, v={-1:0}] [L1126] EXPR 0 v[0] [L1126] EXPR 0 !v || v[0] == 'B' VAL [\old(arg)={0:0}, \result={0:0}, arg={0:0}, t1=-1, t2=0, v={-1:0}] [L1126] CALL 0 __VERIFIER_assert(!v || v[0] == 'B') [L1107] COND FALSE 0 !(!expression) VAL [\old(arg)={0:0}, \old(expression)=1, \result={0:0}, arg={0:0}, expression=1, v={-1:0}] [L1126] RET 0 __VERIFIER_assert(!v || v[0] == 'B') [L1127] 0 return 0; VAL [\old(arg)={0:0}, \result=0, \result={0:0}, arg={0:0}, t1=-1, t2=0, v={-1:0}] - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 20]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 1124]: Unable to prove that petrification did provide enough thread instances (tool internal message) Unable to prove that petrification did provide enough thread instances (tool internal message) Reason: Not analyzed. - UnprovableResult [Line: 1122]: Unable to prove that petrification did provide enough thread instances (tool internal message) Unable to prove that petrification did provide enough thread instances (tool internal message) Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 63 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: 25.9s, OverallIterations: 19, TraceHistogramMax: 9, PathProgramHistogramMax: 7, EmptinessCheckTime: 0.0s, AutomataDifference: 10.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 3034 SdHoareTripleChecker+Valid, 7.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2720 mSDsluCounter, 3098 SdHoareTripleChecker+Invalid, 6.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 3042 mSDsCounter, 80 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 15400 IncrementalHoareTripleChecker+Invalid, 15480 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 80 mSolverCounterUnsat, 56 mSDtfsCounter, 15400 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1074 GetRequests, 764 SyntacticMatches, 0 SemanticMatches, 310 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1477 ImplicationChecksByTransitivity, 4.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=370occurred in iteration=12, InterpolantAutomatonStates: 149, 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, 0.6s SatisfiabilityAnalysisTime, 10.9s InterpolantComputationTime, 1081 NumberOfCodeBlocks, 1015 NumberOfCodeBlocksAsserted, 48 NumberOfCheckSat, 1422 ConstructedInterpolants, 63 QuantifiedInterpolants, 18627 SizeOfPredicates, 42 NumberOfNonLiveVariables, 2179 ConjunctsInSsa, 196 ConjunctsInUnsatCore, 40 InterpolantComputations, 7 PerfectInterpolantSequences, 398/1866 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 RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2024-10-13 12:05:58,025 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 Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /root/.sdkman/candidates/java/current/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 /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/bigshot_s.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.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 4d8c741fd238f074816319de9a9bd5d97cd9b35eb7f53a276be973ea0c31ecbe --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-mul-div-a046e57-m [2024-10-13 12:06:00,330 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-13 12:06:00,403 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2024-10-13 12:06:00,407 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-13 12:06:00,408 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-13 12:06:00,444 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-13 12:06:00,448 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-13 12:06:00,448 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-13 12:06:00,449 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-13 12:06:00,449 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-13 12:06:00,449 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-13 12:06:00,450 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-13 12:06:00,451 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-13 12:06:00,451 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-13 12:06:00,451 INFO L153 SettingsManager]: * Use SBE=true [2024-10-13 12:06:00,452 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-13 12:06:00,452 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-13 12:06:00,453 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-13 12:06:00,453 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-13 12:06:00,453 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-13 12:06:00,454 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-13 12:06:00,457 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-13 12:06:00,457 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-13 12:06:00,458 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-13 12:06:00,458 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-13 12:06:00,458 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-10-13 12:06:00,460 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-13 12:06:00,460 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-10-13 12:06:00,461 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-13 12:06:00,461 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-13 12:06:00,461 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-13 12:06:00,461 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-13 12:06:00,462 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-13 12:06:00,462 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-13 12:06:00,462 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-13 12:06:00,462 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 12:06:00,463 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-13 12:06:00,463 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-13 12:06:00,463 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2024-10-13 12:06:00,463 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-10-13 12:06:00,464 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-13 12:06:00,464 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-13 12:06:00,464 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-13 12:06:00,464 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-13 12:06:00,465 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2024-10-13 12:06:00,465 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4d8c741fd238f074816319de9a9bd5d97cd9b35eb7f53a276be973ea0c31ecbe [2024-10-13 12:06:00,808 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-13 12:06:00,835 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-13 12:06:00,839 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-13 12:06:00,840 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-13 12:06:00,840 INFO L274 PluginConnector]: CDTParser initialized [2024-10-13 12:06:00,842 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/bigshot_s.i [2024-10-13 12:06:02,463 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-13 12:06:02,775 INFO L384 CDTParser]: Found 1 translation units. [2024-10-13 12:06:02,776 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/bigshot_s.i [2024-10-13 12:06:02,810 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd744062a/00cd66fb3c1a4870b267a6f0406a65c3/FLAG16fd9e065 [2024-10-13 12:06:02,824 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd744062a/00cd66fb3c1a4870b267a6f0406a65c3 [2024-10-13 12:06:02,826 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-13 12:06:02,827 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-13 12:06:02,829 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-13 12:06:02,829 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-13 12:06:02,836 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-13 12:06:02,837 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:06:02" (1/1) ... [2024-10-13 12:06:02,840 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5fa3a028 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:06:02, skipping insertion in model container [2024-10-13 12:06:02,840 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:06:02" (1/1) ... [2024-10-13 12:06:02,897 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-13 12:06:03,481 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 12:06:03,502 INFO L200 MainTranslator]: Completed pre-run [2024-10-13 12:06:03,563 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 12:06:03,662 INFO L204 MainTranslator]: Completed translation [2024-10-13 12:06:03,663 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:06:03 WrapperNode [2024-10-13 12:06:03,663 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-13 12:06:03,665 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-13 12:06:03,665 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-13 12:06:03,665 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-13 12:06:03,674 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:06:03" (1/1) ... [2024-10-13 12:06:03,709 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:06:03" (1/1) ... [2024-10-13 12:06:03,741 INFO L138 Inliner]: procedures = 323, calls = 24, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 68 [2024-10-13 12:06:03,741 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-13 12:06:03,742 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-13 12:06:03,742 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-13 12:06:03,742 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-13 12:06:03,754 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:06:03" (1/1) ... [2024-10-13 12:06:03,755 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:06:03" (1/1) ... [2024-10-13 12:06:03,758 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:06:03" (1/1) ... [2024-10-13 12:06:03,792 INFO L175 MemorySlicer]: Split 13 memory accesses to 3 slices as follows [2, 9, 2]. 69 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 8, 0]. The 1 writes are split as follows [0, 0, 1]. [2024-10-13 12:06:03,793 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:06:03" (1/1) ... [2024-10-13 12:06:03,793 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:06:03" (1/1) ... [2024-10-13 12:06:03,804 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:06:03" (1/1) ... [2024-10-13 12:06:03,813 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:06:03" (1/1) ... [2024-10-13 12:06:03,816 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:06:03" (1/1) ... [2024-10-13 12:06:03,821 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:06:03" (1/1) ... [2024-10-13 12:06:03,827 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-13 12:06:03,832 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-13 12:06:03,833 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-13 12:06:03,833 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-13 12:06:03,834 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:06:03" (1/1) ... [2024-10-13 12:06:03,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 12:06:03,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 12:06:03,871 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) [2024-10-13 12:06:03,878 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 [2024-10-13 12:06:03,928 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1#0 [2024-10-13 12:06:03,930 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1#1 [2024-10-13 12:06:03,930 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1#2 [2024-10-13 12:06:03,930 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-10-13 12:06:03,931 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2024-10-13 12:06:03,931 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#2 [2024-10-13 12:06:03,931 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-13 12:06:03,931 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-13 12:06:03,932 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-13 12:06:03,933 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-13 12:06:03,933 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1#0 [2024-10-13 12:06:03,933 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1#1 [2024-10-13 12:06:03,933 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1#2 [2024-10-13 12:06:03,934 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-13 12:06:03,934 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-13 12:06:03,934 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-13 12:06:03,934 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-13 12:06:03,936 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-13 12:06:04,127 INFO L238 CfgBuilder]: Building ICFG [2024-10-13 12:06:04,130 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-13 12:06:04,403 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-13 12:06:04,405 INFO L287 CfgBuilder]: Performing block encoding [2024-10-13 12:06:04,598 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-13 12:06:04,599 INFO L314 CfgBuilder]: Removed 1 assume(true) statements. [2024-10-13 12:06:04,600 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:06:04 BoogieIcfgContainer [2024-10-13 12:06:04,600 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-13 12:06:04,602 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-13 12:06:04,603 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-13 12:06:04,608 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-13 12:06:04,608 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 12:06:02" (1/3) ... [2024-10-13 12:06:04,609 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38703789 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 12:06:04, skipping insertion in model container [2024-10-13 12:06:04,609 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:06:03" (2/3) ... [2024-10-13 12:06:04,609 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38703789 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 12:06:04, skipping insertion in model container [2024-10-13 12:06:04,610 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:06:04" (3/3) ... [2024-10-13 12:06:04,611 INFO L112 eAbstractionObserver]: Analyzing ICFG bigshot_s.i [2024-10-13 12:06:04,630 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-13 12:06:04,630 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2024-10-13 12:06:04,630 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-13 12:06:04,697 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-10-13 12:06:04,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 48 places, 47 transitions, 108 flow [2024-10-13 12:06:04,771 INFO L124 PetriNetUnfolderBase]: 6/45 cut-off events. [2024-10-13 12:06:04,771 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-13 12:06:04,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54 conditions, 45 events. 6/45 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 65 event pairs, 0 based on Foata normal form. 0/29 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2024-10-13 12:06:04,774 INFO L82 GeneralOperation]: Start removeDead. Operand has 48 places, 47 transitions, 108 flow [2024-10-13 12:06:04,778 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 45 places, 44 transitions, 100 flow [2024-10-13 12:06:04,789 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-13 12:06:04,796 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;@ba70c20, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-13 12:06:04,796 INFO L334 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2024-10-13 12:06:04,803 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-13 12:06:04,804 INFO L124 PetriNetUnfolderBase]: 1/14 cut-off events. [2024-10-13 12:06:04,804 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-13 12:06:04,804 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:06:04,805 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:06:04,806 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-13 12:06:04,812 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:06:04,812 INFO L85 PathProgramCache]: Analyzing trace with hash 2100677542, now seen corresponding path program 1 times [2024-10-13 12:06:04,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-13 12:06:04,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1346226165] [2024-10-13 12:06:04,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:06:04,834 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-13 12:06:04,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-13 12:06:04,837 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-13 12:06:04,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2024-10-13 12:06:04,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:06:04,947 INFO L255 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-13 12:06:04,954 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:06:05,065 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2024-10-13 12:06:05,066 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2024-10-13 12:06:05,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:06:05,109 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-13 12:06:05,109 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-13 12:06:05,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1346226165] [2024-10-13 12:06:05,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1346226165] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:06:05,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:06:05,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 12:06:05,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272139185] [2024-10-13 12:06:05,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:06:05,121 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-13 12:06:05,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-13 12:06:05,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-13 12:06:05,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-13 12:06:05,226 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 47 [2024-10-13 12:06:05,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 44 transitions, 100 flow. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 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) [2024-10-13 12:06:05,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:06:05,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 47 [2024-10-13 12:06:05,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:06:05,335 INFO L124 PetriNetUnfolderBase]: 9/58 cut-off events. [2024-10-13 12:06:05,335 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-13 12:06:05,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97 conditions, 58 events. 9/58 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 140 event pairs, 2 based on Foata normal form. 4/52 useless extension candidates. Maximal degree in co-relation 76. Up to 21 conditions per place. [2024-10-13 12:06:05,337 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 16 selfloop transitions, 3 changer transitions 0/39 dead transitions. [2024-10-13 12:06:05,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 39 transitions, 128 flow [2024-10-13 12:06:05,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-13 12:06:05,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-13 12:06:05,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 112 transitions. [2024-10-13 12:06:05,358 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5957446808510638 [2024-10-13 12:06:05,364 INFO L175 Difference]: Start difference. First operand has 45 places, 44 transitions, 100 flow. Second operand 4 states and 112 transitions. [2024-10-13 12:06:05,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 39 transitions, 128 flow [2024-10-13 12:06:05,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 39 transitions, 120 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-13 12:06:05,377 INFO L231 Difference]: Finished difference. Result has 41 places, 38 transitions, 86 flow [2024-10-13 12:06:05,383 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=86, PETRI_PLACES=41, PETRI_TRANSITIONS=38} [2024-10-13 12:06:05,391 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, -4 predicate places. [2024-10-13 12:06:05,391 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 38 transitions, 86 flow [2024-10-13 12:06:05,392 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 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) [2024-10-13 12:06:05,392 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:06:05,392 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:06:05,397 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2024-10-13 12:06:05,593 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-13 12:06:05,594 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-13 12:06:05,595 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:06:05,595 INFO L85 PathProgramCache]: Analyzing trace with hash 696494632, now seen corresponding path program 1 times [2024-10-13 12:06:05,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-13 12:06:05,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1896670744] [2024-10-13 12:06:05,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:06:05,596 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-13 12:06:05,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-13 12:06:05,600 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-13 12:06:05,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2024-10-13 12:06:05,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:06:05,689 INFO L255 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-13 12:06:05,691 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:06:05,724 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-10-13 12:06:05,725 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2024-10-13 12:06:05,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:06:05,793 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-13 12:06:05,793 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-13 12:06:05,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1896670744] [2024-10-13 12:06:05,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1896670744] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:06:05,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:06:05,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 12:06:05,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125110625] [2024-10-13 12:06:05,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:06:05,797 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-13 12:06:05,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-13 12:06:05,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-13 12:06:05,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-13 12:06:05,841 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 47 [2024-10-13 12:06:05,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 38 transitions, 86 flow. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 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) [2024-10-13 12:06:05,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:06:05,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 47 [2024-10-13 12:06:05,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:06:05,968 INFO L124 PetriNetUnfolderBase]: 15/75 cut-off events. [2024-10-13 12:06:05,969 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-10-13 12:06:05,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130 conditions, 75 events. 15/75 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 180 event pairs, 6 based on Foata normal form. 2/62 useless extension candidates. Maximal degree in co-relation 47. Up to 37 conditions per place. [2024-10-13 12:06:05,970 INFO L140 encePairwiseOnDemand]: 41/47 looper letters, 20 selfloop transitions, 4 changer transitions 0/42 dead transitions. [2024-10-13 12:06:05,970 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 42 transitions, 144 flow [2024-10-13 12:06:05,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-13 12:06:05,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-13 12:06:05,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 114 transitions. [2024-10-13 12:06:05,974 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6063829787234043 [2024-10-13 12:06:05,974 INFO L175 Difference]: Start difference. First operand has 41 places, 38 transitions, 86 flow. Second operand 4 states and 114 transitions. [2024-10-13 12:06:05,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 42 transitions, 144 flow [2024-10-13 12:06:05,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 42 transitions, 136 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-13 12:06:05,976 INFO L231 Difference]: Finished difference. Result has 42 places, 40 transitions, 103 flow [2024-10-13 12:06:05,977 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=103, PETRI_PLACES=42, PETRI_TRANSITIONS=40} [2024-10-13 12:06:05,977 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, -3 predicate places. [2024-10-13 12:06:05,978 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 40 transitions, 103 flow [2024-10-13 12:06:05,978 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 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) [2024-10-13 12:06:05,978 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:06:05,978 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:06:05,982 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2024-10-13 12:06:06,178 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-13 12:06:06,179 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-13 12:06:06,180 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:06:06,180 INFO L85 PathProgramCache]: Analyzing trace with hash 116497384, now seen corresponding path program 1 times [2024-10-13 12:06:06,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-13 12:06:06,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1813746352] [2024-10-13 12:06:06,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:06:06,181 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-13 12:06:06,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-13 12:06:06,183 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-13 12:06:06,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2024-10-13 12:06:06,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:06:06,259 INFO L255 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-13 12:06:06,261 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:06:06,270 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-10-13 12:06:06,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:06:06,304 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-13 12:06:06,304 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-13 12:06:06,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1813746352] [2024-10-13 12:06:06,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1813746352] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:06:06,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:06:06,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-13 12:06:06,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854016662] [2024-10-13 12:06:06,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:06:06,306 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-13 12:06:06,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-13 12:06:06,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-13 12:06:06,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-13 12:06:06,345 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 47 [2024-10-13 12:06:06,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 40 transitions, 103 flow. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 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) [2024-10-13 12:06:06,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:06:06,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 47 [2024-10-13 12:06:06,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:06:06,448 INFO L124 PetriNetUnfolderBase]: 15/77 cut-off events. [2024-10-13 12:06:06,448 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2024-10-13 12:06:06,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145 conditions, 77 events. 15/77 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 177 event pairs, 1 based on Foata normal form. 0/70 useless extension candidates. Maximal degree in co-relation 49. Up to 20 conditions per place. [2024-10-13 12:06:06,450 INFO L140 encePairwiseOnDemand]: 42/47 looper letters, 19 selfloop transitions, 4 changer transitions 0/40 dead transitions. [2024-10-13 12:06:06,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 40 transitions, 149 flow [2024-10-13 12:06:06,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-13 12:06:06,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-13 12:06:06,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 107 transitions. [2024-10-13 12:06:06,452 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5691489361702128 [2024-10-13 12:06:06,452 INFO L175 Difference]: Start difference. First operand has 42 places, 40 transitions, 103 flow. Second operand 4 states and 107 transitions. [2024-10-13 12:06:06,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 40 transitions, 149 flow [2024-10-13 12:06:06,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 40 transitions, 144 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-13 12:06:06,457 INFO L231 Difference]: Finished difference. Result has 41 places, 38 transitions, 102 flow [2024-10-13 12:06:06,457 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=102, PETRI_PLACES=41, PETRI_TRANSITIONS=38} [2024-10-13 12:06:06,458 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, -4 predicate places. [2024-10-13 12:06:06,458 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 38 transitions, 102 flow [2024-10-13 12:06:06,458 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 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) [2024-10-13 12:06:06,458 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:06:06,458 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:06:06,463 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2024-10-13 12:06:06,659 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-13 12:06:06,660 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-13 12:06:06,660 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:06:06,660 INFO L85 PathProgramCache]: Analyzing trace with hash -683548118, now seen corresponding path program 1 times [2024-10-13 12:06:06,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-13 12:06:06,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1049188984] [2024-10-13 12:06:06,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:06:06,661 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-13 12:06:06,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-13 12:06:06,664 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-13 12:06:06,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2024-10-13 12:06:06,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:06:06,748 INFO L255 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-13 12:06:06,751 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:06:06,763 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-13 12:06:06,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:06:06,870 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-13 12:06:06,870 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-13 12:06:06,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1049188984] [2024-10-13 12:06:06,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1049188984] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:06:06,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:06:06,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-13 12:06:06,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601261313] [2024-10-13 12:06:06,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:06:06,871 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-13 12:06:06,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-13 12:06:06,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-13 12:06:06,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-13 12:06:06,932 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 47 [2024-10-13 12:06:06,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 38 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 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) [2024-10-13 12:06:06,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:06:06,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 47 [2024-10-13 12:06:06,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:06:07,025 INFO L124 PetriNetUnfolderBase]: 14/66 cut-off events. [2024-10-13 12:06:07,026 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2024-10-13 12:06:07,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132 conditions, 66 events. 14/66 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 136 event pairs, 4 based on Foata normal form. 2/62 useless extension candidates. Maximal degree in co-relation 49. Up to 31 conditions per place. [2024-10-13 12:06:07,027 INFO L140 encePairwiseOnDemand]: 41/47 looper letters, 20 selfloop transitions, 4 changer transitions 0/40 dead transitions. [2024-10-13 12:06:07,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 40 transitions, 154 flow [2024-10-13 12:06:07,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-13 12:06:07,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-13 12:06:07,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 114 transitions. [2024-10-13 12:06:07,029 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6063829787234043 [2024-10-13 12:06:07,029 INFO L175 Difference]: Start difference. First operand has 41 places, 38 transitions, 102 flow. Second operand 4 states and 114 transitions. [2024-10-13 12:06:07,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 40 transitions, 154 flow [2024-10-13 12:06:07,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 40 transitions, 146 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-13 12:06:07,033 INFO L231 Difference]: Finished difference. Result has 41 places, 37 transitions, 105 flow [2024-10-13 12:06:07,033 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=105, PETRI_PLACES=41, PETRI_TRANSITIONS=37} [2024-10-13 12:06:07,034 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, -4 predicate places. [2024-10-13 12:06:07,034 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 37 transitions, 105 flow [2024-10-13 12:06:07,035 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 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) [2024-10-13 12:06:07,035 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:06:07,035 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:06:07,041 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2024-10-13 12:06:07,235 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-13 12:06:07,236 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-13 12:06:07,236 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:06:07,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1034755921, now seen corresponding path program 1 times [2024-10-13 12:06:07,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-13 12:06:07,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [846197969] [2024-10-13 12:06:07,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:06:07,237 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-13 12:06:07,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-13 12:06:07,241 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-13 12:06:07,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2024-10-13 12:06:07,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:06:07,316 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-13 12:06:07,319 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:06:07,352 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-10-13 12:06:07,353 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2024-10-13 12:06:07,631 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:06:07,632 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 12:06:07,755 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:06:07,756 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-13 12:06:07,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [846197969] [2024-10-13 12:06:07,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [846197969] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 12:06:07,756 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-13 12:06:07,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 7 [2024-10-13 12:06:07,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355000504] [2024-10-13 12:06:07,757 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-13 12:06:07,757 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-13 12:06:07,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-13 12:06:07,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-13 12:06:07,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-10-13 12:06:08,018 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 47 [2024-10-13 12:06:08,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 37 transitions, 105 flow. Second operand has 9 states, 9 states have (on average 23.666666666666668) internal successors, (213), 9 states have internal predecessors, (213), 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) [2024-10-13 12:06:08,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:06:08,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 47 [2024-10-13 12:06:08,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:06:08,425 INFO L124 PetriNetUnfolderBase]: 27/119 cut-off events. [2024-10-13 12:06:08,425 INFO L125 PetriNetUnfolderBase]: For 41/41 co-relation queries the response was YES. [2024-10-13 12:06:08,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 235 conditions, 119 events. 27/119 cut-off events. For 41/41 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 214 event pairs, 3 based on Foata normal form. 12/126 useless extension candidates. Maximal degree in co-relation 81. Up to 30 conditions per place. [2024-10-13 12:06:08,427 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 26 selfloop transitions, 12 changer transitions 0/52 dead transitions. [2024-10-13 12:06:08,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 52 transitions, 217 flow [2024-10-13 12:06:08,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-13 12:06:08,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-13 12:06:08,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 212 transitions. [2024-10-13 12:06:08,429 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5638297872340425 [2024-10-13 12:06:08,429 INFO L175 Difference]: Start difference. First operand has 41 places, 37 transitions, 105 flow. Second operand 8 states and 212 transitions. [2024-10-13 12:06:08,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 52 transitions, 217 flow [2024-10-13 12:06:08,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 52 transitions, 209 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-13 12:06:08,431 INFO L231 Difference]: Finished difference. Result has 48 places, 41 transitions, 161 flow [2024-10-13 12:06:08,432 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=93, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=161, PETRI_PLACES=48, PETRI_TRANSITIONS=41} [2024-10-13 12:06:08,432 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, 3 predicate places. [2024-10-13 12:06:08,432 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 41 transitions, 161 flow [2024-10-13 12:06:08,433 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 23.666666666666668) internal successors, (213), 9 states have internal predecessors, (213), 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) [2024-10-13 12:06:08,433 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:06:08,433 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:06:08,440 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2024-10-13 12:06:08,633 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-13 12:06:08,634 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-13 12:06:08,634 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:06:08,635 INFO L85 PathProgramCache]: Analyzing trace with hash -2004768693, now seen corresponding path program 1 times [2024-10-13 12:06:08,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-13 12:06:08,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2071483631] [2024-10-13 12:06:08,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:06:08,635 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-13 12:06:08,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-13 12:06:08,639 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-13 12:06:08,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2024-10-13 12:06:08,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:06:08,698 INFO L255 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-13 12:06:08,699 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:06:08,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:06:08,713 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-13 12:06:08,714 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-13 12:06:08,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2071483631] [2024-10-13 12:06:08,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2071483631] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:06:08,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:06:08,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-13 12:06:08,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352078914] [2024-10-13 12:06:08,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:06:08,716 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 12:06:08,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-13 12:06:08,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 12:06:08,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 12:06:08,729 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 47 [2024-10-13 12:06:08,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 41 transitions, 161 flow. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 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) [2024-10-13 12:06:08,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:06:08,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 47 [2024-10-13 12:06:08,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:06:08,810 INFO L124 PetriNetUnfolderBase]: 21/109 cut-off events. [2024-10-13 12:06:08,810 INFO L125 PetriNetUnfolderBase]: For 105/105 co-relation queries the response was YES. [2024-10-13 12:06:08,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 256 conditions, 109 events. 21/109 cut-off events. For 105/105 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 207 event pairs, 11 based on Foata normal form. 1/106 useless extension candidates. Maximal degree in co-relation 173. Up to 51 conditions per place. [2024-10-13 12:06:08,811 INFO L140 encePairwiseOnDemand]: 45/47 looper letters, 24 selfloop transitions, 1 changer transitions 0/41 dead transitions. [2024-10-13 12:06:08,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 41 transitions, 211 flow [2024-10-13 12:06:08,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 12:06:08,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 12:06:08,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 89 transitions. [2024-10-13 12:06:08,813 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6312056737588653 [2024-10-13 12:06:08,813 INFO L175 Difference]: Start difference. First operand has 48 places, 41 transitions, 161 flow. Second operand 3 states and 89 transitions. [2024-10-13 12:06:08,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 41 transitions, 211 flow [2024-10-13 12:06:08,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 41 transitions, 193 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-10-13 12:06:08,816 INFO L231 Difference]: Finished difference. Result has 47 places, 40 transitions, 143 flow [2024-10-13 12:06:08,816 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=141, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=143, PETRI_PLACES=47, PETRI_TRANSITIONS=40} [2024-10-13 12:06:08,817 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, 2 predicate places. [2024-10-13 12:06:08,817 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 40 transitions, 143 flow [2024-10-13 12:06:08,818 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 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) [2024-10-13 12:06:08,818 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:06:08,818 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:06:08,824 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2024-10-13 12:06:09,018 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-13 12:06:09,019 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-13 12:06:09,020 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:06:09,020 INFO L85 PathProgramCache]: Analyzing trace with hash 2031981297, now seen corresponding path program 1 times [2024-10-13 12:06:09,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-13 12:06:09,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1350219165] [2024-10-13 12:06:09,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:06:09,021 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-13 12:06:09,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-13 12:06:09,022 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-13 12:06:09,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2024-10-13 12:06:09,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:06:09,087 INFO L255 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-13 12:06:09,089 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:06:09,096 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-13 12:06:09,235 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:06:09,235 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 12:06:09,336 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:06:09,337 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-13 12:06:09,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1350219165] [2024-10-13 12:06:09,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1350219165] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 12:06:09,337 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-13 12:06:09,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2024-10-13 12:06:09,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100751557] [2024-10-13 12:06:09,338 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-13 12:06:09,338 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-13 12:06:09,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-13 12:06:09,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-13 12:06:09,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-10-13 12:06:09,538 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 47 [2024-10-13 12:06:09,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 40 transitions, 143 flow. Second operand has 8 states, 8 states have (on average 23.625) internal successors, (189), 8 states have internal predecessors, (189), 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) [2024-10-13 12:06:09,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:06:09,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 47 [2024-10-13 12:06:09,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:06:09,803 INFO L124 PetriNetUnfolderBase]: 26/115 cut-off events. [2024-10-13 12:06:09,803 INFO L125 PetriNetUnfolderBase]: For 63/63 co-relation queries the response was YES. [2024-10-13 12:06:09,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 257 conditions, 115 events. 26/115 cut-off events. For 63/63 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 190 event pairs, 4 based on Foata normal form. 6/117 useless extension candidates. Maximal degree in co-relation 231. Up to 30 conditions per place. [2024-10-13 12:06:09,805 INFO L140 encePairwiseOnDemand]: 41/47 looper letters, 27 selfloop transitions, 11 changer transitions 0/52 dead transitions. [2024-10-13 12:06:09,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 52 transitions, 243 flow [2024-10-13 12:06:09,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-13 12:06:09,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-13 12:06:09,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 188 transitions. [2024-10-13 12:06:09,807 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-10-13 12:06:09,807 INFO L175 Difference]: Start difference. First operand has 47 places, 40 transitions, 143 flow. Second operand 7 states and 188 transitions. [2024-10-13 12:06:09,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 52 transitions, 243 flow [2024-10-13 12:06:09,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 52 transitions, 242 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-13 12:06:09,810 INFO L231 Difference]: Finished difference. Result has 56 places, 41 transitions, 192 flow [2024-10-13 12:06:09,810 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=192, PETRI_PLACES=56, PETRI_TRANSITIONS=41} [2024-10-13 12:06:09,811 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, 11 predicate places. [2024-10-13 12:06:09,811 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 41 transitions, 192 flow [2024-10-13 12:06:09,812 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 23.625) internal successors, (189), 8 states have internal predecessors, (189), 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) [2024-10-13 12:06:09,812 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:06:09,812 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:06:09,817 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Ended with exit code 0 [2024-10-13 12:06:10,012 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-13 12:06:10,013 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-13 12:06:10,013 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:06:10,014 INFO L85 PathProgramCache]: Analyzing trace with hash 1448504088, now seen corresponding path program 1 times [2024-10-13 12:06:10,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-13 12:06:10,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1788695539] [2024-10-13 12:06:10,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:06:10,014 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-13 12:06:10,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-13 12:06:10,016 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-13 12:06:10,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2024-10-13 12:06:10,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:06:10,083 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-13 12:06:10,084 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:06:10,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:06:10,140 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-13 12:06:10,140 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-13 12:06:10,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1788695539] [2024-10-13 12:06:10,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1788695539] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:06:10,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:06:10,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-13 12:06:10,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125552370] [2024-10-13 12:06:10,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:06:10,142 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-13 12:06:10,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-13 12:06:10,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-13 12:06:10,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-13 12:06:10,154 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 47 [2024-10-13 12:06:10,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 41 transitions, 192 flow. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 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) [2024-10-13 12:06:10,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:06:10,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 47 [2024-10-13 12:06:10,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:06:10,236 INFO L124 PetriNetUnfolderBase]: 20/108 cut-off events. [2024-10-13 12:06:10,237 INFO L125 PetriNetUnfolderBase]: For 189/189 co-relation queries the response was YES. [2024-10-13 12:06:10,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 295 conditions, 108 events. 20/108 cut-off events. For 189/189 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 183 event pairs, 11 based on Foata normal form. 0/105 useless extension candidates. Maximal degree in co-relation 263. Up to 51 conditions per place. [2024-10-13 12:06:10,238 INFO L140 encePairwiseOnDemand]: 43/47 looper letters, 24 selfloop transitions, 3 changer transitions 0/41 dead transitions. [2024-10-13 12:06:10,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 41 transitions, 246 flow [2024-10-13 12:06:10,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-13 12:06:10,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-13 12:06:10,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 102 transitions. [2024-10-13 12:06:10,240 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5425531914893617 [2024-10-13 12:06:10,240 INFO L175 Difference]: Start difference. First operand has 56 places, 41 transitions, 192 flow. Second operand 4 states and 102 transitions. [2024-10-13 12:06:10,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 41 transitions, 246 flow [2024-10-13 12:06:10,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 41 transitions, 232 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-10-13 12:06:10,244 INFO L231 Difference]: Finished difference. Result has 54 places, 40 transitions, 182 flow [2024-10-13 12:06:10,245 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=51, 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=182, PETRI_PLACES=54, PETRI_TRANSITIONS=40} [2024-10-13 12:06:10,245 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, 9 predicate places. [2024-10-13 12:06:10,245 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 40 transitions, 182 flow [2024-10-13 12:06:10,246 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 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) [2024-10-13 12:06:10,246 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:06:10,246 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:06:10,251 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Ended with exit code 0 [2024-10-13 12:06:10,447 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-13 12:06:10,447 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-13 12:06:10,448 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:06:10,448 INFO L85 PathProgramCache]: Analyzing trace with hash 1989818688, now seen corresponding path program 1 times [2024-10-13 12:06:10,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-13 12:06:10,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [368959114] [2024-10-13 12:06:10,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:06:10,449 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-13 12:06:10,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-13 12:06:10,450 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-13 12:06:10,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2024-10-13 12:06:10,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:06:10,527 INFO L255 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-13 12:06:10,528 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:06:10,619 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-10-13 12:06:10,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:06:10,631 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-13 12:06:10,631 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-13 12:06:10,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [368959114] [2024-10-13 12:06:10,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [368959114] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:06:10,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:06:10,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-13 12:06:10,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272969619] [2024-10-13 12:06:10,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:06:10,632 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-13 12:06:10,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-13 12:06:10,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-13 12:06:10,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-13 12:06:10,681 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 47 [2024-10-13 12:06:10,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 40 transitions, 182 flow. Second operand has 5 states, 5 states have (on average 26.4) internal successors, (132), 5 states have internal predecessors, (132), 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) [2024-10-13 12:06:10,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:06:10,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 47 [2024-10-13 12:06:10,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:06:10,802 INFO L124 PetriNetUnfolderBase]: 21/112 cut-off events. [2024-10-13 12:06:10,803 INFO L125 PetriNetUnfolderBase]: For 103/103 co-relation queries the response was YES. [2024-10-13 12:06:10,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 292 conditions, 112 events. 21/112 cut-off events. For 103/103 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 187 event pairs, 12 based on Foata normal form. 2/113 useless extension candidates. Maximal degree in co-relation 258. Up to 52 conditions per place. [2024-10-13 12:06:10,805 INFO L140 encePairwiseOnDemand]: 42/47 looper letters, 24 selfloop transitions, 5 changer transitions 0/44 dead transitions. [2024-10-13 12:06:10,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 44 transitions, 241 flow [2024-10-13 12:06:10,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-13 12:06:10,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-13 12:06:10,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 164 transitions. [2024-10-13 12:06:10,807 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5815602836879432 [2024-10-13 12:06:10,807 INFO L175 Difference]: Start difference. First operand has 54 places, 40 transitions, 182 flow. Second operand 6 states and 164 transitions. [2024-10-13 12:06:10,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 44 transitions, 241 flow [2024-10-13 12:06:10,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 44 transitions, 235 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-13 12:06:10,812 INFO L231 Difference]: Finished difference. Result has 57 places, 41 transitions, 187 flow [2024-10-13 12:06:10,812 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=167, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=187, PETRI_PLACES=57, PETRI_TRANSITIONS=41} [2024-10-13 12:06:10,813 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, 12 predicate places. [2024-10-13 12:06:10,814 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 41 transitions, 187 flow [2024-10-13 12:06:10,814 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.4) internal successors, (132), 5 states have internal predecessors, (132), 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) [2024-10-13 12:06:10,815 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:06:10,815 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:06:10,821 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2024-10-13 12:06:11,015 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-13 12:06:11,016 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-13 12:06:11,016 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:06:11,017 INFO L85 PathProgramCache]: Analyzing trace with hash -226414099, now seen corresponding path program 1 times [2024-10-13 12:06:11,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-13 12:06:11,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [182580241] [2024-10-13 12:06:11,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:06:11,017 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-13 12:06:11,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-13 12:06:11,020 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-13 12:06:11,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2024-10-13 12:06:11,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:06:11,122 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-13 12:06:11,124 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:06:11,297 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-10-13 12:06:11,311 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:06:11,311 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 12:06:11,435 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:06:11,435 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-13 12:06:11,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [182580241] [2024-10-13 12:06:11,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [182580241] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 12:06:11,436 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-13 12:06:11,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2024-10-13 12:06:11,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879039180] [2024-10-13 12:06:11,436 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-13 12:06:11,437 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-13 12:06:11,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-13 12:06:11,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-13 12:06:11,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-10-13 12:06:11,617 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 47 [2024-10-13 12:06:11,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 41 transitions, 187 flow. Second operand has 10 states, 10 states have (on average 26.2) internal successors, (262), 10 states have internal predecessors, (262), 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) [2024-10-13 12:06:11,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:06:11,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 47 [2024-10-13 12:06:11,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:06:11,817 INFO L124 PetriNetUnfolderBase]: 18/107 cut-off events. [2024-10-13 12:06:11,818 INFO L125 PetriNetUnfolderBase]: For 114/114 co-relation queries the response was YES. [2024-10-13 12:06:11,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 290 conditions, 107 events. 18/107 cut-off events. For 114/114 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 175 event pairs, 7 based on Foata normal form. 2/108 useless extension candidates. Maximal degree in co-relation 258. Up to 35 conditions per place. [2024-10-13 12:06:11,819 INFO L140 encePairwiseOnDemand]: 42/47 looper letters, 22 selfloop transitions, 9 changer transitions 0/46 dead transitions. [2024-10-13 12:06:11,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 46 transitions, 254 flow [2024-10-13 12:06:11,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-13 12:06:11,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-13 12:06:11,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 214 transitions. [2024-10-13 12:06:11,823 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5691489361702128 [2024-10-13 12:06:11,823 INFO L175 Difference]: Start difference. First operand has 57 places, 41 transitions, 187 flow. Second operand 8 states and 214 transitions. [2024-10-13 12:06:11,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 46 transitions, 254 flow [2024-10-13 12:06:11,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 46 transitions, 251 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-13 12:06:11,827 INFO L231 Difference]: Finished difference. Result has 63 places, 41 transitions, 201 flow [2024-10-13 12:06:11,827 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=175, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=201, PETRI_PLACES=63, PETRI_TRANSITIONS=41} [2024-10-13 12:06:11,828 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, 18 predicate places. [2024-10-13 12:06:11,830 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 41 transitions, 201 flow [2024-10-13 12:06:11,830 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.2) internal successors, (262), 10 states have internal predecessors, (262), 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) [2024-10-13 12:06:11,830 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:06:11,831 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:06:11,836 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2024-10-13 12:06:12,031 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-13 12:06:12,031 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-13 12:06:12,032 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:06:12,032 INFO L85 PathProgramCache]: Analyzing trace with hash 595421104, now seen corresponding path program 2 times [2024-10-13 12:06:12,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-13 12:06:12,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [220232659] [2024-10-13 12:06:12,032 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 12:06:12,032 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-13 12:06:12,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-13 12:06:12,034 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-13 12:06:12,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2024-10-13 12:06:12,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 12:06:12,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 12:06:12,131 INFO L255 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-13 12:06:12,133 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:06:12,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-13 12:06:12,159 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-10-13 12:06:12,517 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:06:12,517 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 12:06:12,830 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:06:12,831 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-13 12:06:12,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [220232659] [2024-10-13 12:06:12,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [220232659] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 12:06:12,831 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-13 12:06:12,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2024-10-13 12:06:12,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496919163] [2024-10-13 12:06:12,832 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-13 12:06:12,832 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-13 12:06:12,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-13 12:06:12,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-13 12:06:12,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2024-10-13 12:06:13,594 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 47 [2024-10-13 12:06:13,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 41 transitions, 201 flow. Second operand has 16 states, 16 states have (on average 19.25) internal successors, (308), 16 states have internal predecessors, (308), 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) [2024-10-13 12:06:13,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:06:13,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 47 [2024-10-13 12:06:13,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:06:14,167 INFO L124 PetriNetUnfolderBase]: 50/197 cut-off events. [2024-10-13 12:06:14,167 INFO L125 PetriNetUnfolderBase]: For 358/358 co-relation queries the response was YES. [2024-10-13 12:06:14,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 632 conditions, 197 events. 50/197 cut-off events. For 358/358 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 314 event pairs, 6 based on Foata normal form. 8/204 useless extension candidates. Maximal degree in co-relation 598. Up to 40 conditions per place. [2024-10-13 12:06:14,169 INFO L140 encePairwiseOnDemand]: 41/47 looper letters, 47 selfloop transitions, 17 changer transitions 0/76 dead transitions. [2024-10-13 12:06:14,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 76 transitions, 497 flow [2024-10-13 12:06:14,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-13 12:06:14,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-10-13 12:06:14,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 244 transitions. [2024-10-13 12:06:14,171 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47195357833655704 [2024-10-13 12:06:14,171 INFO L175 Difference]: Start difference. First operand has 63 places, 41 transitions, 201 flow. Second operand 11 states and 244 transitions. [2024-10-13 12:06:14,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 76 transitions, 497 flow [2024-10-13 12:06:14,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 76 transitions, 475 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-10-13 12:06:14,176 INFO L231 Difference]: Finished difference. Result has 73 places, 50 transitions, 339 flow [2024-10-13 12:06:14,176 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=187, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=339, PETRI_PLACES=73, PETRI_TRANSITIONS=50} [2024-10-13 12:06:14,177 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, 28 predicate places. [2024-10-13 12:06:14,177 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 50 transitions, 339 flow [2024-10-13 12:06:14,177 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 19.25) internal successors, (308), 16 states have internal predecessors, (308), 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) [2024-10-13 12:06:14,178 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:06:14,178 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:06:14,184 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Ended with exit code 0 [2024-10-13 12:06:14,381 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-13 12:06:14,382 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-13 12:06:14,382 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:06:14,382 INFO L85 PathProgramCache]: Analyzing trace with hash 969039282, now seen corresponding path program 2 times [2024-10-13 12:06:14,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-13 12:06:14,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2014720563] [2024-10-13 12:06:14,383 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 12:06:14,384 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-13 12:06:14,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-13 12:06:14,387 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-13 12:06:14,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2024-10-13 12:06:14,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-10-13 12:06:14,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 12:06:14,461 INFO L255 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-13 12:06:14,463 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:06:14,495 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-10-13 12:06:14,495 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2024-10-13 12:06:14,957 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-10-13 12:06:14,957 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 12:06:15,454 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-10-13 12:06:15,454 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-13 12:06:15,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2014720563] [2024-10-13 12:06:15,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2014720563] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 12:06:15,454 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-13 12:06:15,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2024-10-13 12:06:15,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470787549] [2024-10-13 12:06:15,455 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-13 12:06:15,455 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-13 12:06:15,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-13 12:06:15,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-13 12:06:15,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-10-13 12:06:15,907 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 47 [2024-10-13 12:06:15,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 50 transitions, 339 flow. Second operand has 10 states, 10 states have (on average 22.8) internal successors, (228), 10 states have internal predecessors, (228), 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) [2024-10-13 12:06:15,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:06:15,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 47 [2024-10-13 12:06:15,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:06:16,111 INFO L124 PetriNetUnfolderBase]: 48/187 cut-off events. [2024-10-13 12:06:16,112 INFO L125 PetriNetUnfolderBase]: For 610/610 co-relation queries the response was YES. [2024-10-13 12:06:16,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 637 conditions, 187 events. 48/187 cut-off events. For 610/610 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 270 event pairs, 2 based on Foata normal form. 8/194 useless extension candidates. Maximal degree in co-relation 596. Up to 77 conditions per place. [2024-10-13 12:06:16,113 INFO L140 encePairwiseOnDemand]: 40/47 looper letters, 22 selfloop transitions, 20 changer transitions 0/53 dead transitions. [2024-10-13 12:06:16,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 53 transitions, 423 flow [2024-10-13 12:06:16,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-13 12:06:16,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-13 12:06:16,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-10-13 12:06:16,116 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5141843971631206 [2024-10-13 12:06:16,116 INFO L175 Difference]: Start difference. First operand has 73 places, 50 transitions, 339 flow. Second operand 6 states and 145 transitions. [2024-10-13 12:06:16,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 53 transitions, 423 flow [2024-10-13 12:06:16,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 53 transitions, 396 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-10-13 12:06:16,120 INFO L231 Difference]: Finished difference. Result has 70 places, 50 transitions, 359 flow [2024-10-13 12:06:16,121 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=359, PETRI_PLACES=70, PETRI_TRANSITIONS=50} [2024-10-13 12:06:16,121 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, 25 predicate places. [2024-10-13 12:06:16,121 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 50 transitions, 359 flow [2024-10-13 12:06:16,122 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 22.8) internal successors, (228), 10 states have internal predecessors, (228), 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) [2024-10-13 12:06:16,122 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:06:16,122 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:06:16,129 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Ended with exit code 0 [2024-10-13 12:06:16,325 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-13 12:06:16,326 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-13 12:06:16,326 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:06:16,327 INFO L85 PathProgramCache]: Analyzing trace with hash 1930966962, now seen corresponding path program 2 times [2024-10-13 12:06:16,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-13 12:06:16,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1907374894] [2024-10-13 12:06:16,327 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 12:06:16,327 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-13 12:06:16,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-13 12:06:16,329 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-13 12:06:16,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2024-10-13 12:06:16,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 12:06:16,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 12:06:16,431 INFO L255 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-10-13 12:06:16,436 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:06:16,479 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-13 12:06:17,211 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-13 12:06:17,266 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2024-10-13 12:06:17,274 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2024-10-13 12:06:17,301 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:06:17,302 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 12:06:17,401 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 35 [2024-10-13 12:06:17,971 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:06:17,972 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-13 12:06:17,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1907374894] [2024-10-13 12:06:17,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1907374894] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 12:06:17,972 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-13 12:06:17,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 18 [2024-10-13 12:06:17,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764924160] [2024-10-13 12:06:17,972 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-13 12:06:17,973 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-13 12:06:17,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-13 12:06:17,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-13 12:06:17,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2024-10-13 12:06:19,007 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 47 [2024-10-13 12:06:19,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 50 transitions, 359 flow. Second operand has 19 states, 19 states have (on average 18.789473684210527) internal successors, (357), 19 states have internal predecessors, (357), 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) [2024-10-13 12:06:19,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:06:19,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 47 [2024-10-13 12:06:19,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:06:20,008 INFO L124 PetriNetUnfolderBase]: 43/192 cut-off events. [2024-10-13 12:06:20,009 INFO L125 PetriNetUnfolderBase]: For 616/616 co-relation queries the response was YES. [2024-10-13 12:06:20,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 658 conditions, 192 events. 43/192 cut-off events. For 616/616 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 323 event pairs, 10 based on Foata normal form. 2/192 useless extension candidates. Maximal degree in co-relation 617. Up to 49 conditions per place. [2024-10-13 12:06:20,011 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 39 selfloop transitions, 22 changer transitions 0/72 dead transitions. [2024-10-13 12:06:20,011 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 72 transitions, 528 flow [2024-10-13 12:06:20,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-10-13 12:06:20,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-10-13 12:06:20,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 345 transitions. [2024-10-13 12:06:20,015 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4078014184397163 [2024-10-13 12:06:20,015 INFO L175 Difference]: Start difference. First operand has 70 places, 50 transitions, 359 flow. Second operand 18 states and 345 transitions. [2024-10-13 12:06:20,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 72 transitions, 528 flow [2024-10-13 12:06:20,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 72 transitions, 501 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-13 12:06:20,026 INFO L231 Difference]: Finished difference. Result has 89 places, 55 transitions, 414 flow [2024-10-13 12:06:20,026 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=320, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=414, PETRI_PLACES=89, PETRI_TRANSITIONS=55} [2024-10-13 12:06:20,027 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, 44 predicate places. [2024-10-13 12:06:20,027 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 55 transitions, 414 flow [2024-10-13 12:06:20,028 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 18.789473684210527) internal successors, (357), 19 states have internal predecessors, (357), 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) [2024-10-13 12:06:20,028 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:06:20,028 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:06:20,035 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Ended with exit code 0 [2024-10-13 12:06:20,228 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-13 12:06:20,229 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-13 12:06:20,229 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:06:20,229 INFO L85 PathProgramCache]: Analyzing trace with hash -23103902, now seen corresponding path program 1 times [2024-10-13 12:06:20,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-13 12:06:20,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [892551157] [2024-10-13 12:06:20,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:06:20,230 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-13 12:06:20,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-13 12:06:20,234 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-13 12:06:20,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2024-10-13 12:06:20,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:06:20,321 INFO L255 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-13 12:06:20,323 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:06:20,554 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-10-13 12:06:20,561 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:06:20,562 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 12:06:20,701 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:06:20,701 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-13 12:06:20,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [892551157] [2024-10-13 12:06:20,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [892551157] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 12:06:20,701 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-13 12:06:20,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2024-10-13 12:06:20,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3835884] [2024-10-13 12:06:20,702 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-13 12:06:20,702 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-13 12:06:20,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-13 12:06:20,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-13 12:06:20,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2024-10-13 12:06:21,043 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 47 [2024-10-13 12:06:21,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 55 transitions, 414 flow. Second operand has 14 states, 14 states have (on average 25.857142857142858) internal successors, (362), 14 states have internal predecessors, (362), 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) [2024-10-13 12:06:21,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:06:21,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 47 [2024-10-13 12:06:21,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:06:21,358 INFO L124 PetriNetUnfolderBase]: 32/167 cut-off events. [2024-10-13 12:06:21,359 INFO L125 PetriNetUnfolderBase]: For 600/600 co-relation queries the response was YES. [2024-10-13 12:06:21,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 627 conditions, 167 events. 32/167 cut-off events. For 600/600 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 240 event pairs, 11 based on Foata normal form. 2/168 useless extension candidates. Maximal degree in co-relation 599. Up to 51 conditions per place. [2024-10-13 12:06:21,360 INFO L140 encePairwiseOnDemand]: 42/47 looper letters, 28 selfloop transitions, 15 changer transitions 0/59 dead transitions. [2024-10-13 12:06:21,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 59 transitions, 484 flow [2024-10-13 12:06:21,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-13 12:06:21,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-10-13 12:06:21,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 314 transitions. [2024-10-13 12:06:21,363 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5567375886524822 [2024-10-13 12:06:21,363 INFO L175 Difference]: Start difference. First operand has 89 places, 55 transitions, 414 flow. Second operand 12 states and 314 transitions. [2024-10-13 12:06:21,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 59 transitions, 484 flow [2024-10-13 12:06:21,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 59 transitions, 429 flow, removed 2 selfloop flow, removed 15 redundant places. [2024-10-13 12:06:21,368 INFO L231 Difference]: Finished difference. Result has 81 places, 50 transitions, 355 flow [2024-10-13 12:06:21,368 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=321, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=355, PETRI_PLACES=81, PETRI_TRANSITIONS=50} [2024-10-13 12:06:21,372 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, 36 predicate places. [2024-10-13 12:06:21,372 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 50 transitions, 355 flow [2024-10-13 12:06:21,373 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 25.857142857142858) internal successors, (362), 14 states have internal predecessors, (362), 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) [2024-10-13 12:06:21,373 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:06:21,373 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:06:21,379 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Ended with exit code 0 [2024-10-13 12:06:21,573 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-13 12:06:21,574 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-13 12:06:21,574 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:06:21,574 INFO L85 PathProgramCache]: Analyzing trace with hash -960558792, now seen corresponding path program 3 times [2024-10-13 12:06:21,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-13 12:06:21,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1760370313] [2024-10-13 12:06:21,575 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-13 12:06:21,575 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-13 12:06:21,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-13 12:06:21,576 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-13 12:06:21,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2024-10-13 12:06:21,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-10-13 12:06:21,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 12:06:21,717 INFO L255 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-10-13 12:06:21,719 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:06:21,774 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-13 12:06:22,871 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-13 12:06:22,919 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 21 [2024-10-13 12:06:22,923 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2024-10-13 12:06:22,948 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:06:22,949 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 12:06:23,035 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 35 [2024-10-13 12:06:23,961 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:06:23,961 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-13 12:06:23,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1760370313] [2024-10-13 12:06:23,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1760370313] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 12:06:23,961 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-13 12:06:23,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 22 [2024-10-13 12:06:23,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729705965] [2024-10-13 12:06:23,962 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-13 12:06:23,962 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-10-13 12:06:23,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-13 12:06:23,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-10-13 12:06:23,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2024-10-13 12:06:25,456 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 47 [2024-10-13 12:06:25,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 50 transitions, 355 flow. Second operand has 23 states, 23 states have (on average 18.82608695652174) internal successors, (433), 23 states have internal predecessors, (433), 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) [2024-10-13 12:06:25,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:06:25,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 47 [2024-10-13 12:06:25,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:06:28,020 INFO L124 PetriNetUnfolderBase]: 54/241 cut-off events. [2024-10-13 12:06:28,020 INFO L125 PetriNetUnfolderBase]: For 855/855 co-relation queries the response was YES. [2024-10-13 12:06:28,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 907 conditions, 241 events. 54/241 cut-off events. For 855/855 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 389 event pairs, 4 based on Foata normal form. 3/243 useless extension candidates. Maximal degree in co-relation 865. Up to 44 conditions per place. [2024-10-13 12:06:28,023 INFO L140 encePairwiseOnDemand]: 34/47 looper letters, 58 selfloop transitions, 34 changer transitions 0/103 dead transitions. [2024-10-13 12:06:28,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 103 transitions, 802 flow [2024-10-13 12:06:28,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-10-13 12:06:28,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-10-13 12:06:28,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 558 transitions. [2024-10-13 12:06:28,026 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.40939104915627295 [2024-10-13 12:06:28,026 INFO L175 Difference]: Start difference. First operand has 81 places, 50 transitions, 355 flow. Second operand 29 states and 558 transitions. [2024-10-13 12:06:28,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 103 transitions, 802 flow [2024-10-13 12:06:28,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 103 transitions, 756 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-10-13 12:06:28,032 INFO L231 Difference]: Finished difference. Result has 108 places, 68 transitions, 578 flow [2024-10-13 12:06:28,033 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=313, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=578, PETRI_PLACES=108, PETRI_TRANSITIONS=68} [2024-10-13 12:06:28,033 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, 63 predicate places. [2024-10-13 12:06:28,033 INFO L471 AbstractCegarLoop]: Abstraction has has 108 places, 68 transitions, 578 flow [2024-10-13 12:06:28,034 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 18.82608695652174) internal successors, (433), 23 states have internal predecessors, (433), 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) [2024-10-13 12:06:28,034 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:06:28,034 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:06:28,041 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Ended with exit code 0 [2024-10-13 12:06:28,238 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-13 12:06:28,239 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-13 12:06:28,239 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:06:28,239 INFO L85 PathProgramCache]: Analyzing trace with hash 1087122109, now seen corresponding path program 4 times [2024-10-13 12:06:28,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-13 12:06:28,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1863852269] [2024-10-13 12:06:28,240 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-13 12:06:28,240 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-13 12:06:28,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-13 12:06:28,241 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-13 12:06:28,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2024-10-13 12:06:28,342 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-13 12:06:28,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 12:06:28,346 INFO L255 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-13 12:06:28,348 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:06:28,734 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-10-13 12:06:28,745 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:06:28,746 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 12:06:28,952 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:06:28,952 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-13 12:06:28,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1863852269] [2024-10-13 12:06:28,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1863852269] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 12:06:28,953 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-13 12:06:28,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2024-10-13 12:06:28,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762781983] [2024-10-13 12:06:28,953 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-13 12:06:28,953 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-13 12:06:28,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-13 12:06:28,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-13 12:06:28,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2024-10-13 12:06:29,457 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 47 [2024-10-13 12:06:29,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 68 transitions, 578 flow. Second operand has 18 states, 18 states have (on average 25.61111111111111) internal successors, (461), 18 states have internal predecessors, (461), 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) [2024-10-13 12:06:29,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:06:29,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 47 [2024-10-13 12:06:29,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:06:29,881 INFO L124 PetriNetUnfolderBase]: 40/225 cut-off events. [2024-10-13 12:06:29,881 INFO L125 PetriNetUnfolderBase]: For 1122/1122 co-relation queries the response was YES. [2024-10-13 12:06:29,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 924 conditions, 225 events. 40/225 cut-off events. For 1122/1122 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 369 event pairs, 15 based on Foata normal form. 2/226 useless extension candidates. Maximal degree in co-relation 881. Up to 67 conditions per place. [2024-10-13 12:06:29,883 INFO L140 encePairwiseOnDemand]: 42/47 looper letters, 38 selfloop transitions, 23 changer transitions 0/80 dead transitions. [2024-10-13 12:06:29,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 80 transitions, 711 flow [2024-10-13 12:06:29,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-13 12:06:29,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-10-13 12:06:29,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 414 transitions. [2024-10-13 12:06:29,886 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.550531914893617 [2024-10-13 12:06:29,886 INFO L175 Difference]: Start difference. First operand has 108 places, 68 transitions, 578 flow. Second operand 16 states and 414 transitions. [2024-10-13 12:06:29,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 80 transitions, 711 flow [2024-10-13 12:06:29,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 80 transitions, 673 flow, removed 8 selfloop flow, removed 11 redundant places. [2024-10-13 12:06:29,893 INFO L231 Difference]: Finished difference. Result has 113 places, 67 transitions, 575 flow [2024-10-13 12:06:29,894 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=525, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=575, PETRI_PLACES=113, PETRI_TRANSITIONS=67} [2024-10-13 12:06:29,894 INFO L277 CegarLoopForPetriNet]: 45 programPoint places, 68 predicate places. [2024-10-13 12:06:29,894 INFO L471 AbstractCegarLoop]: Abstraction has has 113 places, 67 transitions, 575 flow [2024-10-13 12:06:29,895 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 25.61111111111111) internal successors, (461), 18 states have internal predecessors, (461), 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) [2024-10-13 12:06:29,895 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:06:29,895 INFO L204 CegarLoopForPetriNet]: trace histogram [9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:06:29,902 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Ended with exit code 0 [2024-10-13 12:06:30,095 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-13 12:06:30,096 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-13 12:06:30,096 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:06:30,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1467565216, now seen corresponding path program 3 times [2024-10-13 12:06:30,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-13 12:06:30,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [455992291] [2024-10-13 12:06:30,097 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-13 12:06:30,097 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-13 12:06:30,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-13 12:06:30,098 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-13 12:06:30,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2024-10-13 12:06:30,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-13 12:06:30,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 12:06:30,164 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-13 12:06:30,165 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:06:30,190 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-10-13 12:06:30,190 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2024-10-13 12:06:30,576 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 12:06:30,577 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2024-10-13 12:06:30,670 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 21 proven. 23 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2024-10-13 12:06:30,670 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 12:06:37,414 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2024-10-13 12:06:37,415 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-13 12:06:37,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [455992291] [2024-10-13 12:06:37,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [455992291] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 12:06:37,415 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-13 12:06:37,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 11 [2024-10-13 12:06:37,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961611912] [2024-10-13 12:06:37,415 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-13 12:06:37,416 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-13 12:06:37,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-13 12:06:37,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-13 12:06:37,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=115, Unknown=1, NotChecked=0, Total=156 [2024-10-13 12:06:40,647 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1]