./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/chl-array-int-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 3289d67d Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/chl-array-int-symm.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8a0558934008acf79b7e5b205fa256c568a1b783af274566f36b253458639325 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-3289d67-m [2024-11-17 03:31:36,465 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-17 03:31:36,540 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-17 03:31:36,547 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-17 03:31:36,547 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-17 03:31:36,577 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-17 03:31:36,578 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-17 03:31:36,578 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-17 03:31:36,579 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-17 03:31:36,580 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-17 03:31:36,580 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-17 03:31:36,580 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-17 03:31:36,581 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-17 03:31:36,583 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-17 03:31:36,583 INFO L153 SettingsManager]: * Use SBE=true [2024-11-17 03:31:36,583 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-17 03:31:36,584 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-17 03:31:36,584 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-17 03:31:36,584 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-17 03:31:36,585 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-17 03:31:36,585 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-17 03:31:36,589 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-17 03:31:36,589 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-17 03:31:36,589 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-17 03:31:36,589 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-17 03:31:36,590 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-17 03:31:36,590 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-17 03:31:36,590 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-17 03:31:36,591 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-17 03:31:36,591 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-17 03:31:36,591 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-17 03:31:36,591 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-17 03:31:36,592 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-17 03:31:36,592 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-17 03:31:36,592 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-17 03:31:36,592 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-17 03:31:36,593 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-17 03:31:36,593 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-17 03:31:36,593 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-17 03:31:36,593 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-17 03:31:36,593 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-17 03:31:36,594 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-17 03:31:36,594 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8a0558934008acf79b7e5b205fa256c568a1b783af274566f36b253458639325 [2024-11-17 03:31:36,823 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-17 03:31:36,845 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-17 03:31:36,848 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-17 03:31:36,849 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-17 03:31:36,850 INFO L274 PluginConnector]: CDTParser initialized [2024-11-17 03:31:36,851 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/chl-array-int-symm.wvr.c [2024-11-17 03:31:38,225 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-17 03:31:38,396 INFO L384 CDTParser]: Found 1 translation units. [2024-11-17 03:31:38,397 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-array-int-symm.wvr.c [2024-11-17 03:31:38,405 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/884c01e09/06aea1631a904b7db56f891d329621be/FLAG45e51606e [2024-11-17 03:31:38,804 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/884c01e09/06aea1631a904b7db56f891d329621be [2024-11-17 03:31:38,806 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-17 03:31:38,807 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-17 03:31:38,810 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-17 03:31:38,810 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-17 03:31:38,814 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-17 03:31:38,815 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:31:38" (1/1) ... [2024-11-17 03:31:38,815 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37ffe9ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:31:38, skipping insertion in model container [2024-11-17 03:31:38,816 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:31:38" (1/1) ... [2024-11-17 03:31:38,835 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-17 03:31:39,039 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-17 03:31:39,043 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-17 03:31:39,050 INFO L200 MainTranslator]: Completed pre-run [2024-11-17 03:31:39,077 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-17 03:31:39,093 INFO L204 MainTranslator]: Completed translation [2024-11-17 03:31:39,093 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:31:39 WrapperNode [2024-11-17 03:31:39,093 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-17 03:31:39,094 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-17 03:31:39,094 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-17 03:31:39,094 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-17 03:31:39,101 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:31:39" (1/1) ... [2024-11-17 03:31:39,107 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:31:39" (1/1) ... [2024-11-17 03:31:39,129 INFO L138 Inliner]: procedures = 24, calls = 30, calls flagged for inlining = 14, calls inlined = 18, statements flattened = 191 [2024-11-17 03:31:39,130 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-17 03:31:39,130 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-17 03:31:39,131 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-17 03:31:39,131 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-17 03:31:39,139 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:31:39" (1/1) ... [2024-11-17 03:31:39,139 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:31:39" (1/1) ... [2024-11-17 03:31:39,143 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:31:39" (1/1) ... [2024-11-17 03:31:39,158 INFO L175 MemorySlicer]: Split 12 memory accesses to 2 slices as follows [2, 10]. 83 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-11-17 03:31:39,158 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:31:39" (1/1) ... [2024-11-17 03:31:39,158 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:31:39" (1/1) ... [2024-11-17 03:31:39,165 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:31:39" (1/1) ... [2024-11-17 03:31:39,165 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:31:39" (1/1) ... [2024-11-17 03:31:39,167 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:31:39" (1/1) ... [2024-11-17 03:31:39,168 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:31:39" (1/1) ... [2024-11-17 03:31:39,171 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-17 03:31:39,171 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-17 03:31:39,172 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-17 03:31:39,172 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-17 03:31:39,173 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:31:39" (1/1) ... [2024-11-17 03:31:39,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-17 03:31:39,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:31:39,202 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-17 03:31:39,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-17 03:31:39,240 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-17 03:31:39,241 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-17 03:31:39,241 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-17 03:31:39,242 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-17 03:31:39,242 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-17 03:31:39,242 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-17 03:31:39,242 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-17 03:31:39,242 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-17 03:31:39,242 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-17 03:31:39,243 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-17 03:31:39,243 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-17 03:31:39,243 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-17 03:31:39,243 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-17 03:31:39,243 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-17 03:31:39,244 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-17 03:31:39,336 INFO L256 CfgBuilder]: Building ICFG [2024-11-17 03:31:39,338 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-17 03:31:39,776 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-17 03:31:39,776 INFO L307 CfgBuilder]: Performing block encoding [2024-11-17 03:31:40,024 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-17 03:31:40,025 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-17 03:31:40,025 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.11 03:31:40 BoogieIcfgContainer [2024-11-17 03:31:40,026 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-17 03:31:40,028 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-17 03:31:40,029 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-17 03:31:40,031 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-17 03:31:40,032 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 03:31:38" (1/3) ... [2024-11-17 03:31:40,033 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b79569b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:31:40, skipping insertion in model container [2024-11-17 03:31:40,033 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:31:39" (2/3) ... [2024-11-17 03:31:40,035 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b79569b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:31:40, skipping insertion in model container [2024-11-17 03:31:40,035 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.11 03:31:40" (3/3) ... [2024-11-17 03:31:40,036 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-array-int-symm.wvr.c [2024-11-17 03:31:40,052 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-17 03:31:40,052 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 22 error locations. [2024-11-17 03:31:40,053 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-17 03:31:40,108 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-17 03:31:40,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 67 places, 70 transitions, 154 flow [2024-11-17 03:31:40,161 INFO L124 PetriNetUnfolderBase]: 10/68 cut-off events. [2024-11-17 03:31:40,161 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-17 03:31:40,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77 conditions, 68 events. 10/68 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 174 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 45. Up to 3 conditions per place. [2024-11-17 03:31:40,165 INFO L82 GeneralOperation]: Start removeDead. Operand has 67 places, 70 transitions, 154 flow [2024-11-17 03:31:40,168 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 64 places, 67 transitions, 146 flow [2024-11-17 03:31:40,177 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-17 03:31:40,185 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;@77dcf54b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-17 03:31:40,185 INFO L334 AbstractCegarLoop]: Starting to check reachability of 40 error locations. [2024-11-17 03:31:40,192 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-17 03:31:40,192 INFO L124 PetriNetUnfolderBase]: 2/7 cut-off events. [2024-11-17 03:31:40,192 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-17 03:31:40,192 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:31:40,193 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-17 03:31:40,193 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-17 03:31:40,198 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:31:40,199 INFO L85 PathProgramCache]: Analyzing trace with hash 17860762, now seen corresponding path program 1 times [2024-11-17 03:31:40,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:31:40,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767427998] [2024-11-17 03:31:40,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:31:40,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:31:40,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:31:40,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:31:40,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:31:40,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767427998] [2024-11-17 03:31:40,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767427998] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:31:40,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:31:40,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-17 03:31:40,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25860391] [2024-11-17 03:31:40,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:31:40,487 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-17 03:31:40,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:31:40,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-17 03:31:40,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-17 03:31:40,566 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 70 [2024-11-17 03:31:40,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 67 transitions, 146 flow. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:31:40,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:31:40,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 70 [2024-11-17 03:31:40,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:31:40,699 INFO L124 PetriNetUnfolderBase]: 100/296 cut-off events. [2024-11-17 03:31:40,702 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2024-11-17 03:31:40,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 480 conditions, 296 events. 100/296 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1516 event pairs, 54 based on Foata normal form. 24/214 useless extension candidates. Maximal degree in co-relation 422. Up to 158 conditions per place. [2024-11-17 03:31:40,708 INFO L140 encePairwiseOnDemand]: 61/70 looper letters, 22 selfloop transitions, 2 changer transitions 0/59 dead transitions. [2024-11-17 03:31:40,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 59 transitions, 178 flow [2024-11-17 03:31:40,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:31:40,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:31:40,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 145 transitions. [2024-11-17 03:31:40,721 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6904761904761905 [2024-11-17 03:31:40,723 INFO L175 Difference]: Start difference. First operand has 64 places, 67 transitions, 146 flow. Second operand 3 states and 145 transitions. [2024-11-17 03:31:40,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 59 transitions, 178 flow [2024-11-17 03:31:40,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 59 transitions, 170 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-17 03:31:40,729 INFO L231 Difference]: Finished difference. Result has 58 places, 59 transitions, 126 flow [2024-11-17 03:31:40,732 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=126, PETRI_PLACES=58, PETRI_TRANSITIONS=59} [2024-11-17 03:31:40,736 INFO L277 CegarLoopForPetriNet]: 64 programPoint places, -6 predicate places. [2024-11-17 03:31:40,736 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 59 transitions, 126 flow [2024-11-17 03:31:40,737 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:31:40,737 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:31:40,737 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-17 03:31:40,737 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-17 03:31:40,737 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-17 03:31:40,738 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:31:40,738 INFO L85 PathProgramCache]: Analyzing trace with hash 17860763, now seen corresponding path program 1 times [2024-11-17 03:31:40,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:31:40,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026164393] [2024-11-17 03:31:40,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:31:40,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:31:40,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:31:41,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:31:41,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:31:41,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026164393] [2024-11-17 03:31:41,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026164393] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:31:41,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:31:41,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-17 03:31:41,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026085262] [2024-11-17 03:31:41,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:31:41,083 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 03:31:41,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:31:41,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 03:31:41,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-17 03:31:41,186 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 70 [2024-11-17 03:31:41,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 59 transitions, 126 flow. Second operand has 4 states, 4 states have (on average 38.75) internal successors, (155), 4 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:31:41,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:31:41,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 70 [2024-11-17 03:31:41,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:31:41,321 INFO L124 PetriNetUnfolderBase]: 100/295 cut-off events. [2024-11-17 03:31:41,322 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-17 03:31:41,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 470 conditions, 295 events. 100/295 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1516 event pairs, 54 based on Foata normal form. 0/188 useless extension candidates. Maximal degree in co-relation 445. Up to 162 conditions per place. [2024-11-17 03:31:41,326 INFO L140 encePairwiseOnDemand]: 65/70 looper letters, 21 selfloop transitions, 4 changer transitions 0/58 dead transitions. [2024-11-17 03:31:41,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 58 transitions, 174 flow [2024-11-17 03:31:41,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-17 03:31:41,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-17 03:31:41,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 178 transitions. [2024-11-17 03:31:41,330 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6357142857142857 [2024-11-17 03:31:41,331 INFO L175 Difference]: Start difference. First operand has 58 places, 59 transitions, 126 flow. Second operand 4 states and 178 transitions. [2024-11-17 03:31:41,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 58 transitions, 174 flow [2024-11-17 03:31:41,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 58 transitions, 170 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:31:41,334 INFO L231 Difference]: Finished difference. Result has 58 places, 58 transitions, 128 flow [2024-11-17 03:31:41,335 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=128, PETRI_PLACES=58, PETRI_TRANSITIONS=58} [2024-11-17 03:31:41,336 INFO L277 CegarLoopForPetriNet]: 64 programPoint places, -6 predicate places. [2024-11-17 03:31:41,336 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 58 transitions, 128 flow [2024-11-17 03:31:41,336 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.75) internal successors, (155), 4 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:31:41,336 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:31:41,337 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:31:41,337 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-17 03:31:41,337 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-17 03:31:41,338 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:31:41,338 INFO L85 PathProgramCache]: Analyzing trace with hash -485081235, now seen corresponding path program 1 times [2024-11-17 03:31:41,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:31:41,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588929555] [2024-11-17 03:31:41,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:31:41,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:31:41,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:31:41,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:31:41,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:31:41,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588929555] [2024-11-17 03:31:41,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588929555] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:31:41,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:31:41,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-17 03:31:41,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321518665] [2024-11-17 03:31:41,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:31:41,590 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-17 03:31:41,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:31:41,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-17 03:31:41,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-17 03:31:41,728 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 70 [2024-11-17 03:31:41,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 58 transitions, 128 flow. Second operand has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:31:41,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:31:41,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 70 [2024-11-17 03:31:41,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:31:41,852 INFO L124 PetriNetUnfolderBase]: 102/305 cut-off events. [2024-11-17 03:31:41,852 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-11-17 03:31:41,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 491 conditions, 305 events. 102/305 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1529 event pairs, 54 based on Foata normal form. 0/198 useless extension candidates. Maximal degree in co-relation 463. Up to 165 conditions per place. [2024-11-17 03:31:41,857 INFO L140 encePairwiseOnDemand]: 62/70 looper letters, 24 selfloop transitions, 7 changer transitions 0/64 dead transitions. [2024-11-17 03:31:41,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 64 transitions, 208 flow [2024-11-17 03:31:41,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-17 03:31:41,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-17 03:31:41,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 222 transitions. [2024-11-17 03:31:41,859 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6342857142857142 [2024-11-17 03:31:41,859 INFO L175 Difference]: Start difference. First operand has 58 places, 58 transitions, 128 flow. Second operand 5 states and 222 transitions. [2024-11-17 03:31:41,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 64 transitions, 208 flow [2024-11-17 03:31:41,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 64 transitions, 194 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-17 03:31:41,865 INFO L231 Difference]: Finished difference. Result has 62 places, 64 transitions, 173 flow [2024-11-17 03:31:41,865 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=173, PETRI_PLACES=62, PETRI_TRANSITIONS=64} [2024-11-17 03:31:41,866 INFO L277 CegarLoopForPetriNet]: 64 programPoint places, -2 predicate places. [2024-11-17 03:31:41,866 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 64 transitions, 173 flow [2024-11-17 03:31:41,866 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 38.8) internal successors, (194), 5 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:31:41,866 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:31:41,867 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2024-11-17 03:31:41,867 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-17 03:31:41,867 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-17 03:31:41,868 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:31:41,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1510424390, now seen corresponding path program 1 times [2024-11-17 03:31:41,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:31:41,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657293232] [2024-11-17 03:31:41,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:31:41,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:31:41,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:31:42,091 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:31:42,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:31:42,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657293232] [2024-11-17 03:31:42,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657293232] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:31:42,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022326476] [2024-11-17 03:31:42,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:31:42,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:31:42,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:31:42,095 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:31:42,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-17 03:31:42,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:31:42,179 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-17 03:31:42,183 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:31:42,252 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-17 03:31:42,500 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:31:42,500 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:31:42,730 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:31:42,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022326476] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:31:42,731 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:31:42,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-17 03:31:42,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706593527] [2024-11-17 03:31:42,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:31:42,732 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-17 03:31:42,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:31:42,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-17 03:31:42,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-11-17 03:31:43,404 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 70 [2024-11-17 03:31:43,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 64 transitions, 173 flow. Second operand has 13 states, 13 states have (on average 37.46153846153846) internal successors, (487), 13 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:31:43,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:31:43,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 70 [2024-11-17 03:31:43,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:31:43,728 INFO L124 PetriNetUnfolderBase]: 104/314 cut-off events. [2024-11-17 03:31:43,728 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-11-17 03:31:43,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 533 conditions, 314 events. 104/314 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1574 event pairs, 54 based on Foata normal form. 0/208 useless extension candidates. Maximal degree in co-relation 461. Up to 159 conditions per place. [2024-11-17 03:31:43,731 INFO L140 encePairwiseOnDemand]: 62/70 looper letters, 24 selfloop transitions, 18 changer transitions 0/73 dead transitions. [2024-11-17 03:31:43,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 73 transitions, 287 flow [2024-11-17 03:31:43,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-17 03:31:43,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-17 03:31:43,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 368 transitions. [2024-11-17 03:31:43,737 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5841269841269842 [2024-11-17 03:31:43,737 INFO L175 Difference]: Start difference. First operand has 62 places, 64 transitions, 173 flow. Second operand 9 states and 368 transitions. [2024-11-17 03:31:43,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 73 transitions, 287 flow [2024-11-17 03:31:43,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 73 transitions, 286 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-17 03:31:43,741 INFO L231 Difference]: Finished difference. Result has 68 places, 69 transitions, 230 flow [2024-11-17 03:31:43,741 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=230, PETRI_PLACES=68, PETRI_TRANSITIONS=69} [2024-11-17 03:31:43,742 INFO L277 CegarLoopForPetriNet]: 64 programPoint places, 4 predicate places. [2024-11-17 03:31:43,743 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 69 transitions, 230 flow [2024-11-17 03:31:43,743 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 37.46153846153846) internal successors, (487), 13 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:31:43,743 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:31:43,744 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:31:43,761 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-17 03:31:43,947 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:31:43,948 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-17 03:31:43,948 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:31:43,948 INFO L85 PathProgramCache]: Analyzing trace with hash -862906759, now seen corresponding path program 1 times [2024-11-17 03:31:43,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:31:43,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609605103] [2024-11-17 03:31:43,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:31:43,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:31:43,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:31:44,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:31:44,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:31:44,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609605103] [2024-11-17 03:31:44,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609605103] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:31:44,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:31:44,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-17 03:31:44,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101553217] [2024-11-17 03:31:44,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:31:44,015 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-17 03:31:44,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:31:44,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-17 03:31:44,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-17 03:31:44,063 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 70 [2024-11-17 03:31:44,063 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 69 transitions, 230 flow. Second operand has 5 states, 5 states have (on average 38.6) internal successors, (193), 5 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:31:44,063 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:31:44,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 70 [2024-11-17 03:31:44,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:31:44,213 INFO L124 PetriNetUnfolderBase]: 171/521 cut-off events. [2024-11-17 03:31:44,214 INFO L125 PetriNetUnfolderBase]: For 56/56 co-relation queries the response was YES. [2024-11-17 03:31:44,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 912 conditions, 521 events. 171/521 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3049 event pairs, 72 based on Foata normal form. 12/390 useless extension candidates. Maximal degree in co-relation 545. Up to 204 conditions per place. [2024-11-17 03:31:44,217 INFO L140 encePairwiseOnDemand]: 64/70 looper letters, 67 selfloop transitions, 5 changer transitions 0/102 dead transitions. [2024-11-17 03:31:44,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 102 transitions, 487 flow [2024-11-17 03:31:44,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-17 03:31:44,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-17 03:31:44,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 280 transitions. [2024-11-17 03:31:44,219 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-11-17 03:31:44,219 INFO L175 Difference]: Start difference. First operand has 68 places, 69 transitions, 230 flow. Second operand 6 states and 280 transitions. [2024-11-17 03:31:44,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 102 transitions, 487 flow [2024-11-17 03:31:44,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 102 transitions, 419 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-11-17 03:31:44,223 INFO L231 Difference]: Finished difference. Result has 70 places, 71 transitions, 210 flow [2024-11-17 03:31:44,223 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=210, PETRI_PLACES=70, PETRI_TRANSITIONS=71} [2024-11-17 03:31:44,224 INFO L277 CegarLoopForPetriNet]: 64 programPoint places, 6 predicate places. [2024-11-17 03:31:44,224 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 71 transitions, 210 flow [2024-11-17 03:31:44,224 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 38.6) internal successors, (193), 5 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:31:44,225 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:31:44,225 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:31:44,225 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-17 03:31:44,225 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-17 03:31:44,226 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:31:44,226 INFO L85 PathProgramCache]: Analyzing trace with hash -544919573, now seen corresponding path program 1 times [2024-11-17 03:31:44,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:31:44,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164846086] [2024-11-17 03:31:44,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:31:44,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:31:44,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:31:44,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:31:44,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:31:44,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164846086] [2024-11-17 03:31:44,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164846086] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:31:44,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:31:44,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-17 03:31:44,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725554734] [2024-11-17 03:31:44,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:31:44,323 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 03:31:44,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:31:44,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 03:31:44,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-17 03:31:44,364 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 70 [2024-11-17 03:31:44,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 71 transitions, 210 flow. Second operand has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 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) [2024-11-17 03:31:44,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:31:44,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 70 [2024-11-17 03:31:44,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:31:44,467 INFO L124 PetriNetUnfolderBase]: 214/600 cut-off events. [2024-11-17 03:31:44,467 INFO L125 PetriNetUnfolderBase]: For 75/75 co-relation queries the response was YES. [2024-11-17 03:31:44,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1074 conditions, 600 events. 214/600 cut-off events. For 75/75 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 3504 event pairs, 136 based on Foata normal form. 0/477 useless extension candidates. Maximal degree in co-relation 725. Up to 348 conditions per place. [2024-11-17 03:31:44,471 INFO L140 encePairwiseOnDemand]: 63/70 looper letters, 33 selfloop transitions, 7 changer transitions 0/67 dead transitions. [2024-11-17 03:31:44,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 67 transitions, 282 flow [2024-11-17 03:31:44,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-17 03:31:44,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-17 03:31:44,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 186 transitions. [2024-11-17 03:31:44,473 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5314285714285715 [2024-11-17 03:31:44,473 INFO L175 Difference]: Start difference. First operand has 70 places, 71 transitions, 210 flow. Second operand 5 states and 186 transitions. [2024-11-17 03:31:44,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 67 transitions, 282 flow [2024-11-17 03:31:44,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 67 transitions, 278 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-17 03:31:44,475 INFO L231 Difference]: Finished difference. Result has 69 places, 67 transitions, 212 flow [2024-11-17 03:31:44,476 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=212, PETRI_PLACES=69, PETRI_TRANSITIONS=67} [2024-11-17 03:31:44,476 INFO L277 CegarLoopForPetriNet]: 64 programPoint places, 5 predicate places. [2024-11-17 03:31:44,476 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 67 transitions, 212 flow [2024-11-17 03:31:44,477 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 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) [2024-11-17 03:31:44,477 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:31:44,477 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:31:44,477 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-17 03:31:44,477 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-17 03:31:44,478 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:31:44,478 INFO L85 PathProgramCache]: Analyzing trace with hash -544919572, now seen corresponding path program 1 times [2024-11-17 03:31:44,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:31:44,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109258237] [2024-11-17 03:31:44,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:31:44,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:31:44,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:31:44,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:31:44,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:31:44,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109258237] [2024-11-17 03:31:44,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109258237] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:31:44,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:31:44,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-17 03:31:44,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341896381] [2024-11-17 03:31:44,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:31:44,554 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-17 03:31:44,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:31:44,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-17 03:31:44,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-17 03:31:44,593 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 70 [2024-11-17 03:31:44,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 67 transitions, 212 flow. Second operand has 5 states, 5 states have (on average 39.0) internal successors, (195), 5 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:31:44,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:31:44,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 70 [2024-11-17 03:31:44,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:31:44,706 INFO L124 PetriNetUnfolderBase]: 146/400 cut-off events. [2024-11-17 03:31:44,706 INFO L125 PetriNetUnfolderBase]: For 65/65 co-relation queries the response was YES. [2024-11-17 03:31:44,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 765 conditions, 400 events. 146/400 cut-off events. For 65/65 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1994 event pairs, 74 based on Foata normal form. 7/328 useless extension candidates. Maximal degree in co-relation 534. Up to 207 conditions per place. [2024-11-17 03:31:44,709 INFO L140 encePairwiseOnDemand]: 64/70 looper letters, 60 selfloop transitions, 5 changer transitions 0/91 dead transitions. [2024-11-17 03:31:44,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 91 transitions, 425 flow [2024-11-17 03:31:44,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-17 03:31:44,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-17 03:31:44,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 273 transitions. [2024-11-17 03:31:44,711 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-11-17 03:31:44,711 INFO L175 Difference]: Start difference. First operand has 69 places, 67 transitions, 212 flow. Second operand 6 states and 273 transitions. [2024-11-17 03:31:44,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 91 transitions, 425 flow [2024-11-17 03:31:44,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 91 transitions, 404 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-17 03:31:44,715 INFO L231 Difference]: Finished difference. Result has 72 places, 68 transitions, 215 flow [2024-11-17 03:31:44,715 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=215, PETRI_PLACES=72, PETRI_TRANSITIONS=68} [2024-11-17 03:31:44,716 INFO L277 CegarLoopForPetriNet]: 64 programPoint places, 8 predicate places. [2024-11-17 03:31:44,717 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 68 transitions, 215 flow [2024-11-17 03:31:44,717 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 39.0) internal successors, (195), 5 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:31:44,717 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:31:44,717 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:31:44,717 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-17 03:31:44,718 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-17 03:31:44,718 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:31:44,718 INFO L85 PathProgramCache]: Analyzing trace with hash 460325827, now seen corresponding path program 1 times [2024-11-17 03:31:44,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:31:44,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936293964] [2024-11-17 03:31:44,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:31:44,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:31:44,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:31:44,791 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:31:44,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:31:44,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936293964] [2024-11-17 03:31:44,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936293964] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:31:44,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:31:44,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-17 03:31:44,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050073174] [2024-11-17 03:31:44,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:31:44,792 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-17 03:31:44,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:31:44,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-17 03:31:44,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-17 03:31:44,847 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 70 [2024-11-17 03:31:44,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 68 transitions, 215 flow. Second operand has 5 states, 5 states have (on average 39.0) internal successors, (195), 5 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:31:44,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:31:44,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 70 [2024-11-17 03:31:44,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:31:45,003 INFO L124 PetriNetUnfolderBase]: 209/655 cut-off events. [2024-11-17 03:31:45,003 INFO L125 PetriNetUnfolderBase]: For 157/157 co-relation queries the response was YES. [2024-11-17 03:31:45,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1249 conditions, 655 events. 209/655 cut-off events. For 157/157 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 3982 event pairs, 101 based on Foata normal form. 12/538 useless extension candidates. Maximal degree in co-relation 875. Up to 255 conditions per place. [2024-11-17 03:31:45,007 INFO L140 encePairwiseOnDemand]: 64/70 looper letters, 60 selfloop transitions, 8 changer transitions 0/94 dead transitions. [2024-11-17 03:31:45,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 94 transitions, 426 flow [2024-11-17 03:31:45,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-17 03:31:45,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-17 03:31:45,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 276 transitions. [2024-11-17 03:31:45,009 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6571428571428571 [2024-11-17 03:31:45,009 INFO L175 Difference]: Start difference. First operand has 72 places, 68 transitions, 215 flow. Second operand 6 states and 276 transitions. [2024-11-17 03:31:45,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 94 transitions, 426 flow [2024-11-17 03:31:45,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 94 transitions, 419 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-17 03:31:45,011 INFO L231 Difference]: Finished difference. Result has 77 places, 71 transitions, 254 flow [2024-11-17 03:31:45,011 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=254, PETRI_PLACES=77, PETRI_TRANSITIONS=71} [2024-11-17 03:31:45,012 INFO L277 CegarLoopForPetriNet]: 64 programPoint places, 13 predicate places. [2024-11-17 03:31:45,012 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 71 transitions, 254 flow [2024-11-17 03:31:45,012 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 39.0) internal successors, (195), 5 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:31:45,012 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:31:45,012 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:31:45,013 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-17 03:31:45,013 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-17 03:31:45,013 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:31:45,013 INFO L85 PathProgramCache]: Analyzing trace with hash -228725003, now seen corresponding path program 1 times [2024-11-17 03:31:45,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:31:45,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100346781] [2024-11-17 03:31:45,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:31:45,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:31:45,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:31:45,082 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:31:45,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:31:45,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100346781] [2024-11-17 03:31:45,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100346781] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:31:45,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:31:45,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-17 03:31:45,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309960414] [2024-11-17 03:31:45,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:31:45,083 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-17 03:31:45,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:31:45,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-17 03:31:45,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-17 03:31:45,119 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 70 [2024-11-17 03:31:45,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 71 transitions, 254 flow. Second operand has 5 states, 5 states have (on average 39.4) internal successors, (197), 5 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:31:45,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:31:45,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 70 [2024-11-17 03:31:45,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:31:45,235 INFO L124 PetriNetUnfolderBase]: 184/571 cut-off events. [2024-11-17 03:31:45,235 INFO L125 PetriNetUnfolderBase]: For 308/308 co-relation queries the response was YES. [2024-11-17 03:31:45,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1192 conditions, 571 events. 184/571 cut-off events. For 308/308 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 3265 event pairs, 98 based on Foata normal form. 7/480 useless extension candidates. Maximal degree in co-relation 760. Up to 258 conditions per place. [2024-11-17 03:31:45,239 INFO L140 encePairwiseOnDemand]: 64/70 looper letters, 53 selfloop transitions, 8 changer transitions 0/87 dead transitions. [2024-11-17 03:31:45,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 87 transitions, 433 flow [2024-11-17 03:31:45,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-17 03:31:45,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-17 03:31:45,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 269 transitions. [2024-11-17 03:31:45,240 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6404761904761904 [2024-11-17 03:31:45,241 INFO L175 Difference]: Start difference. First operand has 77 places, 71 transitions, 254 flow. Second operand 6 states and 269 transitions. [2024-11-17 03:31:45,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 87 transitions, 433 flow [2024-11-17 03:31:45,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 87 transitions, 429 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-17 03:31:45,243 INFO L231 Difference]: Finished difference. Result has 83 places, 73 transitions, 287 flow [2024-11-17 03:31:45,243 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=287, PETRI_PLACES=83, PETRI_TRANSITIONS=73} [2024-11-17 03:31:45,244 INFO L277 CegarLoopForPetriNet]: 64 programPoint places, 19 predicate places. [2024-11-17 03:31:45,244 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 73 transitions, 287 flow [2024-11-17 03:31:45,244 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 39.4) internal successors, (197), 5 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:31:45,244 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:31:45,245 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:31:45,245 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-17 03:31:45,245 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-17 03:31:45,245 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:31:45,245 INFO L85 PathProgramCache]: Analyzing trace with hash 166869080, now seen corresponding path program 1 times [2024-11-17 03:31:45,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:31:45,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617336266] [2024-11-17 03:31:45,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:31:45,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:31:45,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:31:45,455 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:31:45,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:31:45,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617336266] [2024-11-17 03:31:45,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617336266] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:31:45,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948378507] [2024-11-17 03:31:45,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:31:45,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:31:45,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:31:45,458 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:31:45,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-17 03:31:45,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:31:45,531 INFO L255 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-17 03:31:45,533 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:31:45,539 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 [2024-11-17 03:31:45,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-17 03:31:45,606 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 16 treesize of output 11 [2024-11-17 03:31:45,618 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-17 03:31:45,618 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 [2024-11-17 03:31:45,682 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:31:45,682 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:31:45,821 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2024-11-17 03:31:45,889 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:31:45,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948378507] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:31:45,889 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:31:45,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-17 03:31:45,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680031885] [2024-11-17 03:31:45,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:31:45,890 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-17 03:31:45,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:31:45,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-17 03:31:45,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-11-17 03:31:46,634 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 70 [2024-11-17 03:31:46,635 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 73 transitions, 287 flow. Second operand has 13 states, 13 states have (on average 36.0) internal successors, (468), 13 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:31:46,635 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:31:46,635 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 70 [2024-11-17 03:31:46,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:31:47,038 INFO L124 PetriNetUnfolderBase]: 359/965 cut-off events. [2024-11-17 03:31:47,038 INFO L125 PetriNetUnfolderBase]: For 503/503 co-relation queries the response was YES. [2024-11-17 03:31:47,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1997 conditions, 965 events. 359/965 cut-off events. For 503/503 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 5855 event pairs, 106 based on Foata normal form. 0/782 useless extension candidates. Maximal degree in co-relation 1542. Up to 224 conditions per place. [2024-11-17 03:31:47,044 INFO L140 encePairwiseOnDemand]: 60/70 looper letters, 76 selfloop transitions, 17 changer transitions 0/120 dead transitions. [2024-11-17 03:31:47,044 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 120 transitions, 622 flow [2024-11-17 03:31:47,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-17 03:31:47,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-17 03:31:47,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 388 transitions. [2024-11-17 03:31:47,046 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6158730158730159 [2024-11-17 03:31:47,046 INFO L175 Difference]: Start difference. First operand has 83 places, 73 transitions, 287 flow. Second operand 9 states and 388 transitions. [2024-11-17 03:31:47,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 120 transitions, 622 flow [2024-11-17 03:31:47,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 120 transitions, 608 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-17 03:31:47,049 INFO L231 Difference]: Finished difference. Result has 89 places, 78 transitions, 353 flow [2024-11-17 03:31:47,049 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=353, PETRI_PLACES=89, PETRI_TRANSITIONS=78} [2024-11-17 03:31:47,050 INFO L277 CegarLoopForPetriNet]: 64 programPoint places, 25 predicate places. [2024-11-17 03:31:47,050 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 78 transitions, 353 flow [2024-11-17 03:31:47,051 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 36.0) internal successors, (468), 13 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:31:47,051 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:31:47,051 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:31:47,067 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-17 03:31:47,255 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,SelfDestructingSolverStorable9 [2024-11-17 03:31:47,256 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-17 03:31:47,256 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:31:47,256 INFO L85 PathProgramCache]: Analyzing trace with hash 877974705, now seen corresponding path program 1 times [2024-11-17 03:31:47,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:31:47,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708961293] [2024-11-17 03:31:47,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:31:47,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:31:47,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:31:47,321 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:31:47,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:31:47,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708961293] [2024-11-17 03:31:47,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708961293] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:31:47,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:31:47,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-17 03:31:47,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666408101] [2024-11-17 03:31:47,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:31:47,323 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 03:31:47,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:31:47,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 03:31:47,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-17 03:31:47,366 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 70 [2024-11-17 03:31:47,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 78 transitions, 353 flow. Second operand has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:31:47,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:31:47,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 70 [2024-11-17 03:31:47,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:31:47,487 INFO L124 PetriNetUnfolderBase]: 393/1014 cut-off events. [2024-11-17 03:31:47,487 INFO L125 PetriNetUnfolderBase]: For 756/756 co-relation queries the response was YES. [2024-11-17 03:31:47,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2227 conditions, 1014 events. 393/1014 cut-off events. For 756/756 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 5969 event pairs, 301 based on Foata normal form. 0/951 useless extension candidates. Maximal degree in co-relation 1767. Up to 686 conditions per place. [2024-11-17 03:31:47,523 INFO L140 encePairwiseOnDemand]: 64/70 looper letters, 43 selfloop transitions, 7 changer transitions 0/74 dead transitions. [2024-11-17 03:31:47,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 74 transitions, 445 flow [2024-11-17 03:31:47,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-17 03:31:47,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-17 03:31:47,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 155 transitions. [2024-11-17 03:31:47,525 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5535714285714286 [2024-11-17 03:31:47,526 INFO L175 Difference]: Start difference. First operand has 89 places, 78 transitions, 353 flow. Second operand 4 states and 155 transitions. [2024-11-17 03:31:47,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 74 transitions, 445 flow [2024-11-17 03:31:47,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 74 transitions, 434 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-11-17 03:31:47,528 INFO L231 Difference]: Finished difference. Result has 86 places, 74 transitions, 348 flow [2024-11-17 03:31:47,529 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=334, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=348, PETRI_PLACES=86, PETRI_TRANSITIONS=74} [2024-11-17 03:31:47,529 INFO L277 CegarLoopForPetriNet]: 64 programPoint places, 22 predicate places. [2024-11-17 03:31:47,529 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 74 transitions, 348 flow [2024-11-17 03:31:47,530 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:31:47,530 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:31:47,530 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:31:47,530 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-17 03:31:47,530 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-17 03:31:47,531 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:31:47,531 INFO L85 PathProgramCache]: Analyzing trace with hash 877974706, now seen corresponding path program 1 times [2024-11-17 03:31:47,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:31:47,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171582826] [2024-11-17 03:31:47,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:31:47,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:31:47,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:31:47,668 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:31:47,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:31:47,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171582826] [2024-11-17 03:31:47,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171582826] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:31:47,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458788870] [2024-11-17 03:31:47,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:31:47,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:31:47,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:31:47,671 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:31:47,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-17 03:31:47,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:31:47,748 INFO L255 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-17 03:31:47,749 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:31:47,833 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:31:47,833 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:31:47,881 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-11-17 03:31:47,893 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:31:47,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458788870] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:31:47,894 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:31:47,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2024-11-17 03:31:47,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985268238] [2024-11-17 03:31:47,894 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:31:47,895 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-17 03:31:47,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:31:47,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-17 03:31:47,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-17 03:31:48,237 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 70 [2024-11-17 03:31:48,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 74 transitions, 348 flow. Second operand has 11 states, 11 states have (on average 38.72727272727273) internal successors, (426), 11 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:31:48,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:31:48,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 70 [2024-11-17 03:31:48,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:31:48,575 INFO L124 PetriNetUnfolderBase]: 325/833 cut-off events. [2024-11-17 03:31:48,575 INFO L125 PetriNetUnfolderBase]: For 634/634 co-relation queries the response was YES. [2024-11-17 03:31:48,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1879 conditions, 833 events. 325/833 cut-off events. For 634/634 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 4587 event pairs, 107 based on Foata normal form. 0/758 useless extension candidates. Maximal degree in co-relation 1439. Up to 201 conditions per place. [2024-11-17 03:31:48,582 INFO L140 encePairwiseOnDemand]: 60/70 looper letters, 69 selfloop transitions, 17 changer transitions 0/110 dead transitions. [2024-11-17 03:31:48,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 110 transitions, 616 flow [2024-11-17 03:31:48,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-17 03:31:48,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-17 03:31:48,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 333 transitions. [2024-11-17 03:31:48,584 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6795918367346939 [2024-11-17 03:31:48,584 INFO L175 Difference]: Start difference. First operand has 86 places, 74 transitions, 348 flow. Second operand 7 states and 333 transitions. [2024-11-17 03:31:48,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 110 transitions, 616 flow [2024-11-17 03:31:48,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 110 transitions, 608 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:31:48,588 INFO L231 Difference]: Finished difference. Result has 91 places, 74 transitions, 390 flow [2024-11-17 03:31:48,588 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=338, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=390, PETRI_PLACES=91, PETRI_TRANSITIONS=74} [2024-11-17 03:31:48,589 INFO L277 CegarLoopForPetriNet]: 64 programPoint places, 27 predicate places. [2024-11-17 03:31:48,589 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 74 transitions, 390 flow [2024-11-17 03:31:48,590 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 38.72727272727273) internal successors, (426), 11 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:31:48,590 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:31:48,590 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:31:48,606 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-17 03:31:48,790 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:31:48,791 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-17 03:31:48,791 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:31:48,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1227182666, now seen corresponding path program 1 times [2024-11-17 03:31:48,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:31:48,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896654749] [2024-11-17 03:31:48,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:31:48,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:31:48,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:31:48,982 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:31:48,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:31:48,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896654749] [2024-11-17 03:31:48,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896654749] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:31:48,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069935154] [2024-11-17 03:31:48,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:31:48,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:31:48,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:31:48,985 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:31:48,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-17 03:31:49,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:31:49,062 INFO L255 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-17 03:31:49,064 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:31:49,070 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 [2024-11-17 03:31:49,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-17 03:31:49,125 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 16 treesize of output 11 [2024-11-17 03:31:49,132 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-17 03:31:49,132 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 [2024-11-17 03:31:49,199 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:31:49,199 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:31:49,330 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2024-11-17 03:31:49,392 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:31:49,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069935154] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:31:49,393 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:31:49,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-17 03:31:49,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594352084] [2024-11-17 03:31:49,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:31:49,394 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-17 03:31:49,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:31:49,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-17 03:31:49,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-11-17 03:31:50,162 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 70 [2024-11-17 03:31:50,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 74 transitions, 390 flow. Second operand has 13 states, 13 states have (on average 37.30769230769231) internal successors, (485), 13 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:31:50,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:31:50,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 70 [2024-11-17 03:31:50,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:31:50,562 INFO L124 PetriNetUnfolderBase]: 536/1386 cut-off events. [2024-11-17 03:31:50,563 INFO L125 PetriNetUnfolderBase]: For 1790/1850 co-relation queries the response was YES. [2024-11-17 03:31:50,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3078 conditions, 1386 events. 536/1386 cut-off events. For 1790/1850 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 8952 event pairs, 171 based on Foata normal form. 0/1216 useless extension candidates. Maximal degree in co-relation 2610. Up to 296 conditions per place. [2024-11-17 03:31:50,572 INFO L140 encePairwiseOnDemand]: 60/70 looper letters, 73 selfloop transitions, 17 changer transitions 0/114 dead transitions. [2024-11-17 03:31:50,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 114 transitions, 724 flow [2024-11-17 03:31:50,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-17 03:31:50,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-17 03:31:50,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 391 transitions. [2024-11-17 03:31:50,574 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6206349206349207 [2024-11-17 03:31:50,574 INFO L175 Difference]: Start difference. First operand has 91 places, 74 transitions, 390 flow. Second operand 9 states and 391 transitions. [2024-11-17 03:31:50,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 114 transitions, 724 flow [2024-11-17 03:31:50,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 114 transitions, 687 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-11-17 03:31:50,582 INFO L231 Difference]: Finished difference. Result has 95 places, 75 transitions, 411 flow [2024-11-17 03:31:50,583 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=358, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=411, PETRI_PLACES=95, PETRI_TRANSITIONS=75} [2024-11-17 03:31:50,583 INFO L277 CegarLoopForPetriNet]: 64 programPoint places, 31 predicate places. [2024-11-17 03:31:50,583 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 75 transitions, 411 flow [2024-11-17 03:31:50,583 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 37.30769230769231) internal successors, (485), 13 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:31:50,583 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:31:50,584 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:31:50,605 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-17 03:31:50,788 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:31:50,789 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-17 03:31:50,789 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:31:50,789 INFO L85 PathProgramCache]: Analyzing trace with hash -612042476, now seen corresponding path program 1 times [2024-11-17 03:31:50,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:31:50,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114590342] [2024-11-17 03:31:50,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:31:50,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:31:50,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:31:50,973 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:31:50,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:31:50,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114590342] [2024-11-17 03:31:50,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114590342] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:31:50,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015685192] [2024-11-17 03:31:50,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:31:50,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:31:50,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:31:50,976 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:31:50,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-17 03:31:51,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:31:51,050 INFO L255 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-17 03:31:51,052 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:31:51,152 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:31:51,152 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:31:51,207 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-11-17 03:31:51,223 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:31:51,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015685192] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:31:51,223 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:31:51,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2024-11-17 03:31:51,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369923772] [2024-11-17 03:31:51,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:31:51,224 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-17 03:31:51,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:31:51,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-17 03:31:51,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-11-17 03:31:51,599 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 70 [2024-11-17 03:31:51,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 75 transitions, 411 flow. Second operand has 12 states, 12 states have (on average 38.0) internal successors, (456), 12 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:31:51,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:31:51,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 70 [2024-11-17 03:31:51,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:31:51,905 INFO L124 PetriNetUnfolderBase]: 606/1383 cut-off events. [2024-11-17 03:31:51,906 INFO L125 PetriNetUnfolderBase]: For 1959/2031 co-relation queries the response was YES. [2024-11-17 03:31:51,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3382 conditions, 1383 events. 606/1383 cut-off events. For 1959/2031 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 8391 event pairs, 173 based on Foata normal form. 0/1343 useless extension candidates. Maximal degree in co-relation 2931. Up to 354 conditions per place. [2024-11-17 03:31:51,913 INFO L140 encePairwiseOnDemand]: 60/70 looper letters, 70 selfloop transitions, 17 changer transitions 0/110 dead transitions. [2024-11-17 03:31:51,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 110 transitions, 712 flow [2024-11-17 03:31:51,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-17 03:31:51,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-17 03:31:51,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 324 transitions. [2024-11-17 03:31:51,915 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6612244897959184 [2024-11-17 03:31:51,915 INFO L175 Difference]: Start difference. First operand has 95 places, 75 transitions, 411 flow. Second operand 7 states and 324 transitions. [2024-11-17 03:31:51,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 110 transitions, 712 flow [2024-11-17 03:31:51,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 110 transitions, 684 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-11-17 03:31:51,919 INFO L231 Difference]: Finished difference. Result has 96 places, 75 transitions, 433 flow [2024-11-17 03:31:51,919 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=381, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=433, PETRI_PLACES=96, PETRI_TRANSITIONS=75} [2024-11-17 03:31:51,920 INFO L277 CegarLoopForPetriNet]: 64 programPoint places, 32 predicate places. [2024-11-17 03:31:51,921 INFO L471 AbstractCegarLoop]: Abstraction has has 96 places, 75 transitions, 433 flow [2024-11-17 03:31:51,921 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 38.0) internal successors, (456), 12 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:31:51,921 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:31:51,921 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:31:51,934 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-17 03:31:52,122 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,SelfDestructingSolverStorable13 [2024-11-17 03:31:52,122 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-17 03:31:52,122 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:31:52,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1601302264, now seen corresponding path program 1 times [2024-11-17 03:31:52,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:31:52,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620870708] [2024-11-17 03:31:52,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:31:52,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:31:52,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:31:52,214 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:31:52,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:31:52,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620870708] [2024-11-17 03:31:52,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620870708] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:31:52,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117070593] [2024-11-17 03:31:52,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:31:52,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:31:52,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:31:52,217 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:31:52,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-17 03:31:52,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:31:52,289 INFO L255 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-17 03:31:52,290 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:31:52,378 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:31:52,381 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:31:52,470 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:31:52,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117070593] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:31:52,470 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:31:52,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 16 [2024-11-17 03:31:52,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552850895] [2024-11-17 03:31:52,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:31:52,471 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-17 03:31:52,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:31:52,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-17 03:31:52,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2024-11-17 03:31:52,745 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 70 [2024-11-17 03:31:52,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 75 transitions, 433 flow. Second operand has 16 states, 16 states have (on average 39.25) internal successors, (628), 16 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:31:52,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:31:52,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 70 [2024-11-17 03:31:52,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:31:53,425 INFO L124 PetriNetUnfolderBase]: 1343/3328 cut-off events. [2024-11-17 03:31:53,425 INFO L125 PetriNetUnfolderBase]: For 5528/5648 co-relation queries the response was YES. [2024-11-17 03:31:53,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8367 conditions, 3328 events. 1343/3328 cut-off events. For 5528/5648 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 26413 event pairs, 448 based on Foata normal form. 66/3290 useless extension candidates. Maximal degree in co-relation 4353. Up to 726 conditions per place. [2024-11-17 03:31:53,448 INFO L140 encePairwiseOnDemand]: 58/70 looper letters, 157 selfloop transitions, 42 changer transitions 0/221 dead transitions. [2024-11-17 03:31:53,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 221 transitions, 1567 flow [2024-11-17 03:31:53,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-17 03:31:53,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-11-17 03:31:53,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1171 transitions. [2024-11-17 03:31:53,451 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6195767195767196 [2024-11-17 03:31:53,451 INFO L175 Difference]: Start difference. First operand has 96 places, 75 transitions, 433 flow. Second operand 27 states and 1171 transitions. [2024-11-17 03:31:53,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 221 transitions, 1567 flow [2024-11-17 03:31:53,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 221 transitions, 1493 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-11-17 03:31:53,461 INFO L231 Difference]: Finished difference. Result has 123 places, 93 transitions, 660 flow [2024-11-17 03:31:53,461 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=403, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=660, PETRI_PLACES=123, PETRI_TRANSITIONS=93} [2024-11-17 03:31:53,462 INFO L277 CegarLoopForPetriNet]: 64 programPoint places, 59 predicate places. [2024-11-17 03:31:53,462 INFO L471 AbstractCegarLoop]: Abstraction has has 123 places, 93 transitions, 660 flow [2024-11-17 03:31:53,462 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 39.25) internal successors, (628), 16 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:31:53,463 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:31:53,463 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] [2024-11-17 03:31:53,479 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-17 03:31:53,663 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-17 03:31:53,663 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-17 03:31:53,664 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:31:53,664 INFO L85 PathProgramCache]: Analyzing trace with hash -540711790, now seen corresponding path program 1 times [2024-11-17 03:31:53,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:31:53,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410056507] [2024-11-17 03:31:53,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:31:53,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:31:53,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:31:53,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:31:53,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:31:53,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410056507] [2024-11-17 03:31:53,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410056507] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:31:53,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:31:53,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-17 03:31:53,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117521817] [2024-11-17 03:31:53,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:31:53,848 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-17 03:31:53,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:31:53,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-17 03:31:53,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-11-17 03:31:53,929 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 70 [2024-11-17 03:31:53,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 93 transitions, 660 flow. Second operand has 8 states, 8 states have (on average 40.0) internal successors, (320), 8 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:31:53,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:31:53,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 70 [2024-11-17 03:31:53,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:31:54,369 INFO L124 PetriNetUnfolderBase]: 1166/3120 cut-off events. [2024-11-17 03:31:54,369 INFO L125 PetriNetUnfolderBase]: For 6571/6717 co-relation queries the response was YES. [2024-11-17 03:31:54,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8073 conditions, 3120 events. 1166/3120 cut-off events. For 6571/6717 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 25438 event pairs, 476 based on Foata normal form. 1/2990 useless extension candidates. Maximal degree in co-relation 4122. Up to 1875 conditions per place. [2024-11-17 03:31:54,393 INFO L140 encePairwiseOnDemand]: 60/70 looper letters, 84 selfloop transitions, 16 changer transitions 12/135 dead transitions. [2024-11-17 03:31:54,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 135 transitions, 1109 flow [2024-11-17 03:31:54,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-17 03:31:54,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-17 03:31:54,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 450 transitions. [2024-11-17 03:31:54,395 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2024-11-17 03:31:54,395 INFO L175 Difference]: Start difference. First operand has 123 places, 93 transitions, 660 flow. Second operand 10 states and 450 transitions. [2024-11-17 03:31:54,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 135 transitions, 1109 flow [2024-11-17 03:31:54,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 135 transitions, 1073 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-11-17 03:31:54,403 INFO L231 Difference]: Finished difference. Result has 131 places, 101 transitions, 794 flow [2024-11-17 03:31:54,404 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=630, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=794, PETRI_PLACES=131, PETRI_TRANSITIONS=101} [2024-11-17 03:31:54,404 INFO L277 CegarLoopForPetriNet]: 64 programPoint places, 67 predicate places. [2024-11-17 03:31:54,404 INFO L471 AbstractCegarLoop]: Abstraction has has 131 places, 101 transitions, 794 flow [2024-11-17 03:31:54,405 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 40.0) internal successors, (320), 8 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:31:54,405 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:31:54,405 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:31:54,405 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-17 03:31:54,405 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-17 03:31:54,405 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:31:54,406 INFO L85 PathProgramCache]: Analyzing trace with hash 813341034, now seen corresponding path program 1 times [2024-11-17 03:31:54,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:31:54,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928164831] [2024-11-17 03:31:54,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:31:54,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:31:54,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:31:54,497 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:31:54,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:31:54,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928164831] [2024-11-17 03:31:54,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928164831] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:31:54,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578696709] [2024-11-17 03:31:54,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:31:54,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:31:54,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:31:54,501 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:31:54,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-17 03:31:54,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:31:54,582 INFO L255 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-17 03:31:54,583 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:31:54,667 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:31:54,668 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:31:54,746 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:31:54,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578696709] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:31:54,746 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:31:54,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 16 [2024-11-17 03:31:54,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206597644] [2024-11-17 03:31:54,746 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:31:54,747 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-17 03:31:54,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:31:54,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-17 03:31:54,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2024-11-17 03:31:55,012 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 70 [2024-11-17 03:31:55,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 101 transitions, 794 flow. Second operand has 16 states, 16 states have (on average 39.5) internal successors, (632), 16 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:31:55,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:31:55,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 70 [2024-11-17 03:31:55,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:31:55,636 INFO L124 PetriNetUnfolderBase]: 1047/2632 cut-off events. [2024-11-17 03:31:55,637 INFO L125 PetriNetUnfolderBase]: For 7287/7488 co-relation queries the response was YES. [2024-11-17 03:31:55,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7095 conditions, 2632 events. 1047/2632 cut-off events. For 7287/7488 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 20083 event pairs, 404 based on Foata normal form. 48/2621 useless extension candidates. Maximal degree in co-relation 6967. Up to 736 conditions per place. [2024-11-17 03:31:55,659 INFO L140 encePairwiseOnDemand]: 58/70 looper letters, 139 selfloop transitions, 47 changer transitions 0/208 dead transitions. [2024-11-17 03:31:55,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 208 transitions, 1675 flow [2024-11-17 03:31:55,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-17 03:31:55,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-11-17 03:31:55,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1162 transitions. [2024-11-17 03:31:55,664 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6148148148148148 [2024-11-17 03:31:55,666 INFO L175 Difference]: Start difference. First operand has 131 places, 101 transitions, 794 flow. Second operand 27 states and 1162 transitions. [2024-11-17 03:31:55,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 208 transitions, 1675 flow [2024-11-17 03:31:55,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 208 transitions, 1640 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-11-17 03:31:55,681 INFO L231 Difference]: Finished difference. Result has 153 places, 114 transitions, 1031 flow [2024-11-17 03:31:55,681 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=775, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=1031, PETRI_PLACES=153, PETRI_TRANSITIONS=114} [2024-11-17 03:31:55,682 INFO L277 CegarLoopForPetriNet]: 64 programPoint places, 89 predicate places. [2024-11-17 03:31:55,682 INFO L471 AbstractCegarLoop]: Abstraction has has 153 places, 114 transitions, 1031 flow [2024-11-17 03:31:55,683 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 39.5) internal successors, (632), 16 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:31:55,683 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:31:55,683 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:31:55,702 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-17 03:31:55,884 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:31:55,884 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-17 03:31:55,885 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:31:55,885 INFO L85 PathProgramCache]: Analyzing trace with hash -1522177059, now seen corresponding path program 1 times [2024-11-17 03:31:55,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:31:55,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193665129] [2024-11-17 03:31:55,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:31:55,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:31:55,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:31:56,021 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:31:56,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:31:56,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193665129] [2024-11-17 03:31:56,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193665129] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:31:56,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379017521] [2024-11-17 03:31:56,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:31:56,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:31:56,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:31:56,024 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:31:56,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-17 03:31:56,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:31:56,111 INFO L255 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-17 03:31:56,113 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:31:56,249 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:31:56,250 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:31:56,346 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:31:56,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379017521] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-17 03:31:56,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-17 03:31:56,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 7] total 15 [2024-11-17 03:31:56,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10607367] [2024-11-17 03:31:56,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:31:56,347 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-17 03:31:56,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:31:56,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-17 03:31:56,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2024-11-17 03:31:56,384 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 70 [2024-11-17 03:31:56,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 114 transitions, 1031 flow. Second operand has 8 states, 8 states have (on average 40.25) internal successors, (322), 8 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:31:56,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:31:56,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 70 [2024-11-17 03:31:56,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:31:56,688 INFO L124 PetriNetUnfolderBase]: 917/2546 cut-off events. [2024-11-17 03:31:56,689 INFO L125 PetriNetUnfolderBase]: For 8203/8373 co-relation queries the response was YES. [2024-11-17 03:31:56,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7074 conditions, 2546 events. 917/2546 cut-off events. For 8203/8373 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 20014 event pairs, 625 based on Foata normal form. 2/2448 useless extension candidates. Maximal degree in co-relation 6577. Up to 1433 conditions per place. [2024-11-17 03:31:56,706 INFO L140 encePairwiseOnDemand]: 59/70 looper letters, 81 selfloop transitions, 33 changer transitions 11/148 dead transitions. [2024-11-17 03:31:56,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 148 transitions, 1392 flow [2024-11-17 03:31:56,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-17 03:31:56,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-17 03:31:56,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 411 transitions. [2024-11-17 03:31:56,708 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6523809523809524 [2024-11-17 03:31:56,708 INFO L175 Difference]: Start difference. First operand has 153 places, 114 transitions, 1031 flow. Second operand 9 states and 411 transitions. [2024-11-17 03:31:56,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 148 transitions, 1392 flow [2024-11-17 03:31:56,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 148 transitions, 1343 flow, removed 0 selfloop flow, removed 16 redundant places. [2024-11-17 03:31:56,748 INFO L231 Difference]: Finished difference. Result has 147 places, 117 transitions, 1062 flow [2024-11-17 03:31:56,749 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=987, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1062, PETRI_PLACES=147, PETRI_TRANSITIONS=117} [2024-11-17 03:31:56,749 INFO L277 CegarLoopForPetriNet]: 64 programPoint places, 83 predicate places. [2024-11-17 03:31:56,749 INFO L471 AbstractCegarLoop]: Abstraction has has 147 places, 117 transitions, 1062 flow [2024-11-17 03:31:56,750 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 40.25) internal successors, (322), 8 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:31:56,750 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:31:56,750 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:31:56,764 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-17 03:31:56,950 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,SelfDestructingSolverStorable17 [2024-11-17 03:31:56,950 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-17 03:31:56,951 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:31:56,951 INFO L85 PathProgramCache]: Analyzing trace with hash 564930371, now seen corresponding path program 2 times [2024-11-17 03:31:56,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:31:56,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536926675] [2024-11-17 03:31:56,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:31:56,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:31:56,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:31:57,087 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:31:57,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:31:57,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536926675] [2024-11-17 03:31:57,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536926675] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:31:57,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550618266] [2024-11-17 03:31:57,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-17 03:31:57,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:31:57,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:31:57,090 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) [2024-11-17 03:31:57,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-17 03:31:57,167 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-17 03:31:57,167 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:31:57,168 INFO L255 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-17 03:31:57,169 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:31:57,202 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:31:57,203 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-17 03:31:57,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550618266] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:31:57,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-17 03:31:57,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 11 [2024-11-17 03:31:57,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696765351] [2024-11-17 03:31:57,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:31:57,204 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 03:31:57,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:31:57,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 03:31:57,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-11-17 03:31:57,210 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 70 [2024-11-17 03:31:57,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 117 transitions, 1062 flow. Second operand has 4 states, 4 states have (on average 44.0) internal successors, (176), 4 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:31:57,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:31:57,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 70 [2024-11-17 03:31:57,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:31:57,539 INFO L124 PetriNetUnfolderBase]: 1444/3778 cut-off events. [2024-11-17 03:31:57,540 INFO L125 PetriNetUnfolderBase]: For 12642/13124 co-relation queries the response was YES. [2024-11-17 03:31:57,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10122 conditions, 3778 events. 1444/3778 cut-off events. For 12642/13124 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 32710 event pairs, 352 based on Foata normal form. 20/3736 useless extension candidates. Maximal degree in co-relation 9962. Up to 1064 conditions per place. [2024-11-17 03:31:57,564 INFO L140 encePairwiseOnDemand]: 64/70 looper letters, 88 selfloop transitions, 24 changer transitions 13/156 dead transitions. [2024-11-17 03:31:57,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 156 transitions, 1585 flow [2024-11-17 03:31:57,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-17 03:31:57,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-17 03:31:57,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 251 transitions. [2024-11-17 03:31:57,565 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7171428571428572 [2024-11-17 03:31:57,565 INFO L175 Difference]: Start difference. First operand has 147 places, 117 transitions, 1062 flow. Second operand 5 states and 251 transitions. [2024-11-17 03:31:57,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 156 transitions, 1585 flow [2024-11-17 03:31:57,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 156 transitions, 1571 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-11-17 03:31:57,578 INFO L231 Difference]: Finished difference. Result has 149 places, 111 transitions, 1040 flow [2024-11-17 03:31:57,578 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=1050, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1040, PETRI_PLACES=149, PETRI_TRANSITIONS=111} [2024-11-17 03:31:57,579 INFO L277 CegarLoopForPetriNet]: 64 programPoint places, 85 predicate places. [2024-11-17 03:31:57,579 INFO L471 AbstractCegarLoop]: Abstraction has has 149 places, 111 transitions, 1040 flow [2024-11-17 03:31:57,579 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 44.0) internal successors, (176), 4 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:31:57,579 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:31:57,579 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:31:57,596 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-17 03:31:57,780 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:31:57,780 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-17 03:31:57,780 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:31:57,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1935163717, now seen corresponding path program 1 times [2024-11-17 03:31:57,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:31:57,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947721584] [2024-11-17 03:31:57,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:31:57,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:31:57,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:31:57,917 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:31:57,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:31:57,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947721584] [2024-11-17 03:31:57,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947721584] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:31:57,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632571031] [2024-11-17 03:31:57,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:31:57,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:31:57,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:31:57,920 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) [2024-11-17 03:31:57,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-17 03:31:57,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:31:57,995 INFO L255 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-17 03:31:57,996 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:31:58,101 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:31:58,102 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:31:58,188 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:31:58,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632571031] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-17 03:31:58,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-17 03:31:58,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9, 7] total 15 [2024-11-17 03:31:58,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023280044] [2024-11-17 03:31:58,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:31:58,189 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-17 03:31:58,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:31:58,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-17 03:31:58,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2024-11-17 03:31:58,243 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 70 [2024-11-17 03:31:58,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 111 transitions, 1040 flow. Second operand has 8 states, 8 states have (on average 40.25) internal successors, (322), 8 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:31:58,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:31:58,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 70 [2024-11-17 03:31:58,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:31:58,645 INFO L124 PetriNetUnfolderBase]: 1404/3713 cut-off events. [2024-11-17 03:31:58,645 INFO L125 PetriNetUnfolderBase]: For 13606/13986 co-relation queries the response was YES. [2024-11-17 03:31:58,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10701 conditions, 3713 events. 1404/3713 cut-off events. For 13606/13986 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 33162 event pairs, 1079 based on Foata normal form. 2/3566 useless extension candidates. Maximal degree in co-relation 10285. Up to 2410 conditions per place. [2024-11-17 03:31:58,665 INFO L140 encePairwiseOnDemand]: 58/70 looper letters, 46 selfloop transitions, 26 changer transitions 30/125 dead transitions. [2024-11-17 03:31:58,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 125 transitions, 1278 flow [2024-11-17 03:31:58,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-17 03:31:58,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-17 03:31:58,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 355 transitions. [2024-11-17 03:31:58,667 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6339285714285714 [2024-11-17 03:31:58,667 INFO L175 Difference]: Start difference. First operand has 149 places, 111 transitions, 1040 flow. Second operand 8 states and 355 transitions. [2024-11-17 03:31:58,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 125 transitions, 1278 flow [2024-11-17 03:31:58,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 125 transitions, 1213 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-11-17 03:31:58,682 INFO L231 Difference]: Finished difference. Result has 143 places, 95 transitions, 859 flow [2024-11-17 03:31:58,682 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=975, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=859, PETRI_PLACES=143, PETRI_TRANSITIONS=95} [2024-11-17 03:31:58,682 INFO L277 CegarLoopForPetriNet]: 64 programPoint places, 79 predicate places. [2024-11-17 03:31:58,682 INFO L471 AbstractCegarLoop]: Abstraction has has 143 places, 95 transitions, 859 flow [2024-11-17 03:31:58,683 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 40.25) internal successors, (322), 8 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:31:58,683 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:31:58,683 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:31:58,700 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-17 03:31:58,887 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:31:58,888 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-17 03:31:58,888 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:31:58,888 INFO L85 PathProgramCache]: Analyzing trace with hash -759277018, now seen corresponding path program 2 times [2024-11-17 03:31:58,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:31:58,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97598105] [2024-11-17 03:31:58,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:31:58,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:31:58,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:31:59,082 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-17 03:31:59,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:31:59,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97598105] [2024-11-17 03:31:59,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97598105] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:31:59,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33552672] [2024-11-17 03:31:59,082 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-17 03:31:59,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:31:59,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:31:59,085 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) [2024-11-17 03:31:59,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-17 03:31:59,178 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-17 03:31:59,178 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:31:59,180 INFO L255 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-17 03:31:59,182 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:31:59,188 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 [2024-11-17 03:31:59,275 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-17 03:31:59,275 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 16 treesize of output 15 [2024-11-17 03:31:59,285 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-17 03:31:59,285 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 [2024-11-17 03:31:59,408 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-17 03:31:59,409 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:31:59,617 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2024-11-17 03:31:59,754 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-17 03:31:59,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33552672] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:31:59,755 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:31:59,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 19 [2024-11-17 03:31:59,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088075325] [2024-11-17 03:31:59,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:31:59,756 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-17 03:31:59,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:31:59,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-17 03:31:59,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2024-11-17 03:32:00,784 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 70 [2024-11-17 03:32:00,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 95 transitions, 859 flow. Second operand has 21 states, 21 states have (on average 36.0) internal successors, (756), 21 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:32:00,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:32:00,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 70 [2024-11-17 03:32:00,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:32:01,663 INFO L124 PetriNetUnfolderBase]: 2319/5185 cut-off events. [2024-11-17 03:32:01,663 INFO L125 PetriNetUnfolderBase]: For 13122/13514 co-relation queries the response was YES. [2024-11-17 03:32:01,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14706 conditions, 5185 events. 2319/5185 cut-off events. For 13122/13514 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 44339 event pairs, 688 based on Foata normal form. 36/5090 useless extension candidates. Maximal degree in co-relation 14454. Up to 1004 conditions per place. [2024-11-17 03:32:01,695 INFO L140 encePairwiseOnDemand]: 61/70 looper letters, 134 selfloop transitions, 27 changer transitions 0/185 dead transitions. [2024-11-17 03:32:01,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 185 transitions, 1647 flow [2024-11-17 03:32:01,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-17 03:32:01,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-17 03:32:01,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 565 transitions. [2024-11-17 03:32:01,697 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6208791208791209 [2024-11-17 03:32:01,697 INFO L175 Difference]: Start difference. First operand has 143 places, 95 transitions, 859 flow. Second operand 13 states and 565 transitions. [2024-11-17 03:32:01,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 185 transitions, 1647 flow [2024-11-17 03:32:01,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 185 transitions, 1538 flow, removed 13 selfloop flow, removed 14 redundant places. [2024-11-17 03:32:01,709 INFO L231 Difference]: Finished difference. Result has 132 places, 99 transitions, 878 flow [2024-11-17 03:32:01,709 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=768, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=878, PETRI_PLACES=132, PETRI_TRANSITIONS=99} [2024-11-17 03:32:01,710 INFO L277 CegarLoopForPetriNet]: 64 programPoint places, 68 predicate places. [2024-11-17 03:32:01,710 INFO L471 AbstractCegarLoop]: Abstraction has has 132 places, 99 transitions, 878 flow [2024-11-17 03:32:01,710 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 36.0) internal successors, (756), 21 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:32:01,710 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:32:01,710 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 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] [2024-11-17 03:32:01,728 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-17 03:32:01,914 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,SelfDestructingSolverStorable20 [2024-11-17 03:32:01,915 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-17 03:32:01,916 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:32:01,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1032080844, now seen corresponding path program 1 times [2024-11-17 03:32:01,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:32:01,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193388342] [2024-11-17 03:32:01,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:32:01,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:32:01,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:32:02,125 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:32:02,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:32:02,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193388342] [2024-11-17 03:32:02,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193388342] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:32:02,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645379067] [2024-11-17 03:32:02,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:32:02,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:32:02,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:32:02,128 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:32:02,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-17 03:32:02,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:32:02,211 INFO L255 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-17 03:32:02,212 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:32:02,311 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:32:02,311 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:32:02,405 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:32:02,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645379067] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-17 03:32:02,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-17 03:32:02,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 6] total 14 [2024-11-17 03:32:02,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062130978] [2024-11-17 03:32:02,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:32:02,406 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-17 03:32:02,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:32:02,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-17 03:32:02,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2024-11-17 03:32:02,458 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 70 [2024-11-17 03:32:02,459 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 99 transitions, 878 flow. Second operand has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:32:02,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:32:02,459 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 70 [2024-11-17 03:32:02,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:32:03,031 INFO L124 PetriNetUnfolderBase]: 1986/4715 cut-off events. [2024-11-17 03:32:03,031 INFO L125 PetriNetUnfolderBase]: For 16291/16748 co-relation queries the response was YES. [2024-11-17 03:32:03,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13799 conditions, 4715 events. 1986/4715 cut-off events. For 16291/16748 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 40262 event pairs, 729 based on Foata normal form. 144/4788 useless extension candidates. Maximal degree in co-relation 9119. Up to 2017 conditions per place. [2024-11-17 03:32:03,062 INFO L140 encePairwiseOnDemand]: 62/70 looper letters, 77 selfloop transitions, 19 changer transitions 0/119 dead transitions. [2024-11-17 03:32:03,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 119 transitions, 1252 flow [2024-11-17 03:32:03,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-17 03:32:03,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-17 03:32:03,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 294 transitions. [2024-11-17 03:32:03,064 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-11-17 03:32:03,064 INFO L175 Difference]: Start difference. First operand has 132 places, 99 transitions, 878 flow. Second operand 7 states and 294 transitions. [2024-11-17 03:32:03,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 119 transitions, 1252 flow [2024-11-17 03:32:03,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 119 transitions, 1213 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-17 03:32:03,079 INFO L231 Difference]: Finished difference. Result has 135 places, 100 transitions, 926 flow [2024-11-17 03:32:03,079 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=847, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=926, PETRI_PLACES=135, PETRI_TRANSITIONS=100} [2024-11-17 03:32:03,080 INFO L277 CegarLoopForPetriNet]: 64 programPoint places, 71 predicate places. [2024-11-17 03:32:03,080 INFO L471 AbstractCegarLoop]: Abstraction has has 135 places, 100 transitions, 926 flow [2024-11-17 03:32:03,080 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 39.0) internal successors, (273), 7 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:32:03,080 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:32:03,081 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:32:03,098 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-17 03:32:03,284 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-17 03:32:03,285 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-17 03:32:03,285 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:32:03,285 INFO L85 PathProgramCache]: Analyzing trace with hash -2062750556, now seen corresponding path program 1 times [2024-11-17 03:32:03,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:32:03,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577530151] [2024-11-17 03:32:03,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:32:03,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:32:03,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:32:03,521 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-17 03:32:03,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:32:03,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577530151] [2024-11-17 03:32:03,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577530151] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:32:03,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517728983] [2024-11-17 03:32:03,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:32:03,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:32:03,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:32:03,523 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:32:03,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-17 03:32:03,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:32:03,614 INFO L255 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-17 03:32:03,615 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:32:03,757 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-17 03:32:03,757 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:32:03,851 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-11-17 03:32:03,893 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-17 03:32:03,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517728983] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:32:03,894 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:32:03,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 20 [2024-11-17 03:32:03,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237565801] [2024-11-17 03:32:03,894 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:32:03,894 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-17 03:32:03,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:32:03,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-17 03:32:03,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2024-11-17 03:32:04,680 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 70 [2024-11-17 03:32:04,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 100 transitions, 926 flow. Second operand has 21 states, 21 states have (on average 38.76190476190476) internal successors, (814), 21 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:32:04,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:32:04,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 70 [2024-11-17 03:32:04,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:32:05,336 INFO L124 PetriNetUnfolderBase]: 1793/4198 cut-off events. [2024-11-17 03:32:05,336 INFO L125 PetriNetUnfolderBase]: For 17202/17603 co-relation queries the response was YES. [2024-11-17 03:32:05,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13157 conditions, 4198 events. 1793/4198 cut-off events. For 17202/17603 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 35142 event pairs, 568 based on Foata normal form. 32/4104 useless extension candidates. Maximal degree in co-relation 8865. Up to 783 conditions per place. [2024-11-17 03:32:05,356 INFO L140 encePairwiseOnDemand]: 61/70 looper letters, 128 selfloop transitions, 27 changer transitions 0/183 dead transitions. [2024-11-17 03:32:05,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 183 transitions, 1711 flow [2024-11-17 03:32:05,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-17 03:32:05,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-17 03:32:05,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 481 transitions. [2024-11-17 03:32:05,358 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6871428571428572 [2024-11-17 03:32:05,358 INFO L175 Difference]: Start difference. First operand has 135 places, 100 transitions, 926 flow. Second operand 10 states and 481 transitions. [2024-11-17 03:32:05,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 183 transitions, 1711 flow [2024-11-17 03:32:05,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 183 transitions, 1672 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-11-17 03:32:05,372 INFO L231 Difference]: Finished difference. Result has 144 places, 102 transitions, 992 flow [2024-11-17 03:32:05,373 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=903, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=992, PETRI_PLACES=144, PETRI_TRANSITIONS=102} [2024-11-17 03:32:05,373 INFO L277 CegarLoopForPetriNet]: 64 programPoint places, 80 predicate places. [2024-11-17 03:32:05,373 INFO L471 AbstractCegarLoop]: Abstraction has has 144 places, 102 transitions, 992 flow [2024-11-17 03:32:05,374 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 38.76190476190476) internal successors, (814), 21 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:32:05,374 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:32:05,374 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:32:05,391 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-17 03:32:05,574 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-11-17 03:32:05,575 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-17 03:32:05,575 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:32:05,576 INFO L85 PathProgramCache]: Analyzing trace with hash -1749216504, now seen corresponding path program 2 times [2024-11-17 03:32:05,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:32:05,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390804322] [2024-11-17 03:32:05,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:32:05,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:32:05,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:32:05,771 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-17 03:32:05,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:32:05,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390804322] [2024-11-17 03:32:05,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390804322] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:32:05,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389911786] [2024-11-17 03:32:05,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-17 03:32:05,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:32:05,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:32:05,774 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:32:05,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-17 03:32:05,862 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-17 03:32:05,862 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:32:05,864 INFO L255 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-17 03:32:05,865 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:32:05,872 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 [2024-11-17 03:32:05,955 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-17 03:32:05,956 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 16 treesize of output 15 [2024-11-17 03:32:05,968 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-17 03:32:05,968 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 [2024-11-17 03:32:06,097 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-17 03:32:06,097 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:32:06,263 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2024-11-17 03:32:06,367 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-17 03:32:06,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389911786] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:32:06,367 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:32:06,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 19 [2024-11-17 03:32:06,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384212386] [2024-11-17 03:32:06,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:32:06,368 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-17 03:32:06,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:32:06,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-17 03:32:06,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2024-11-17 03:32:07,300 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 70 [2024-11-17 03:32:07,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 102 transitions, 992 flow. Second operand has 21 states, 21 states have (on average 37.285714285714285) internal successors, (783), 21 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:32:07,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:32:07,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 70 [2024-11-17 03:32:07,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:32:08,188 INFO L124 PetriNetUnfolderBase]: 2357/5760 cut-off events. [2024-11-17 03:32:08,188 INFO L125 PetriNetUnfolderBase]: For 22445/22859 co-relation queries the response was YES. [2024-11-17 03:32:08,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17487 conditions, 5760 events. 2357/5760 cut-off events. For 22445/22859 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 50836 event pairs, 593 based on Foata normal form. 56/5737 useless extension candidates. Maximal degree in co-relation 12961. Up to 948 conditions per place. [2024-11-17 03:32:08,214 INFO L140 encePairwiseOnDemand]: 61/70 looper letters, 130 selfloop transitions, 25 changer transitions 0/185 dead transitions. [2024-11-17 03:32:08,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 185 transitions, 1865 flow [2024-11-17 03:32:08,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-17 03:32:08,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-17 03:32:08,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 566 transitions. [2024-11-17 03:32:08,216 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.621978021978022 [2024-11-17 03:32:08,216 INFO L175 Difference]: Start difference. First operand has 144 places, 102 transitions, 992 flow. Second operand 13 states and 566 transitions. [2024-11-17 03:32:08,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 185 transitions, 1865 flow [2024-11-17 03:32:08,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 185 transitions, 1839 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-17 03:32:08,239 INFO L231 Difference]: Finished difference. Result has 155 places, 105 transitions, 1061 flow [2024-11-17 03:32:08,239 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=969, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1061, PETRI_PLACES=155, PETRI_TRANSITIONS=105} [2024-11-17 03:32:08,240 INFO L277 CegarLoopForPetriNet]: 64 programPoint places, 91 predicate places. [2024-11-17 03:32:08,240 INFO L471 AbstractCegarLoop]: Abstraction has has 155 places, 105 transitions, 1061 flow [2024-11-17 03:32:08,240 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 37.285714285714285) internal successors, (783), 21 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:32:08,240 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:32:08,240 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:32:08,257 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-17 03:32:08,441 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:32:08,441 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-17 03:32:08,441 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:32:08,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1608863766, now seen corresponding path program 1 times [2024-11-17 03:32:08,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:32:08,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424903421] [2024-11-17 03:32:08,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:32:08,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:32:08,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:32:08,650 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-17 03:32:08,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:32:08,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424903421] [2024-11-17 03:32:08,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424903421] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:32:08,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358413828] [2024-11-17 03:32:08,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:32:08,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:32:08,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:32:08,653 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:32:08,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-17 03:32:08,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:32:08,746 INFO L255 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-17 03:32:08,748 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:32:08,891 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-17 03:32:08,891 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:32:09,007 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-11-17 03:32:09,057 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-17 03:32:09,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358413828] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:32:09,058 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:32:09,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 20 [2024-11-17 03:32:09,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570991503] [2024-11-17 03:32:09,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:32:09,059 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-17 03:32:09,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:32:09,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-17 03:32:09,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2024-11-17 03:32:09,878 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 70 [2024-11-17 03:32:09,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 105 transitions, 1061 flow. Second operand has 21 states, 21 states have (on average 38.04761904761905) internal successors, (799), 21 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:32:09,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:32:09,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 70 [2024-11-17 03:32:09,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:32:10,725 INFO L124 PetriNetUnfolderBase]: 2747/5931 cut-off events. [2024-11-17 03:32:10,725 INFO L125 PetriNetUnfolderBase]: For 26440/26916 co-relation queries the response was YES. [2024-11-17 03:32:10,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19149 conditions, 5931 events. 2747/5931 cut-off events. For 26440/26916 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 49037 event pairs, 668 based on Foata normal form. 56/5857 useless extension candidates. Maximal degree in co-relation 14281. Up to 1144 conditions per place. [2024-11-17 03:32:10,765 INFO L140 encePairwiseOnDemand]: 61/70 looper letters, 132 selfloop transitions, 25 changer transitions 0/188 dead transitions. [2024-11-17 03:32:10,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 188 transitions, 1919 flow [2024-11-17 03:32:10,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-17 03:32:10,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-17 03:32:10,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 467 transitions. [2024-11-17 03:32:10,766 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6671428571428571 [2024-11-17 03:32:10,766 INFO L175 Difference]: Start difference. First operand has 155 places, 105 transitions, 1061 flow. Second operand 10 states and 467 transitions. [2024-11-17 03:32:10,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 188 transitions, 1919 flow [2024-11-17 03:32:10,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 188 transitions, 1886 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-11-17 03:32:10,788 INFO L231 Difference]: Finished difference. Result has 160 places, 107 transitions, 1111 flow [2024-11-17 03:32:10,788 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=1028, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1111, PETRI_PLACES=160, PETRI_TRANSITIONS=107} [2024-11-17 03:32:10,788 INFO L277 CegarLoopForPetriNet]: 64 programPoint places, 96 predicate places. [2024-11-17 03:32:10,788 INFO L471 AbstractCegarLoop]: Abstraction has has 160 places, 107 transitions, 1111 flow [2024-11-17 03:32:10,789 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 38.04761904761905) internal successors, (799), 21 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:32:10,789 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:32:10,789 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:32:10,806 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-17 03:32:10,989 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:32:10,989 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-17 03:32:10,990 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:32:10,990 INFO L85 PathProgramCache]: Analyzing trace with hash 649388026, now seen corresponding path program 3 times [2024-11-17 03:32:10,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:32:10,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181220202] [2024-11-17 03:32:10,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:32:10,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:32:11,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:32:11,122 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-17 03:32:11,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:32:11,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181220202] [2024-11-17 03:32:11,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181220202] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:32:11,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672116850] [2024-11-17 03:32:11,123 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-17 03:32:11,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:32:11,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:32:11,125 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:32:11,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-17 03:32:11,217 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-17 03:32:11,217 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:32:11,218 INFO L255 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-17 03:32:11,219 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:32:11,233 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 [2024-11-17 03:32:11,236 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 [2024-11-17 03:32:11,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-17 03:32:11,345 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 18 treesize of output 13 [2024-11-17 03:32:11,354 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-17 03:32:11,354 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 [2024-11-17 03:32:11,600 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-17 03:32:11,600 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:32:11,900 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-17 03:32:11,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672116850] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:32:11,900 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:32:11,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 18 [2024-11-17 03:32:11,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928301371] [2024-11-17 03:32:11,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:32:11,901 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-17 03:32:11,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:32:11,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-17 03:32:11,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2024-11-17 03:32:12,765 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 70 [2024-11-17 03:32:12,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 107 transitions, 1111 flow. Second operand has 19 states, 19 states have (on average 34.0) internal successors, (646), 19 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:32:12,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:32:12,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 70 [2024-11-17 03:32:12,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:32:14,287 INFO L124 PetriNetUnfolderBase]: 4649/10066 cut-off events. [2024-11-17 03:32:14,288 INFO L125 PetriNetUnfolderBase]: For 54432/55387 co-relation queries the response was YES. [2024-11-17 03:32:14,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34359 conditions, 10066 events. 4649/10066 cut-off events. For 54432/55387 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 92929 event pairs, 1004 based on Foata normal form. 108/9962 useless extension candidates. Maximal degree in co-relation 20446. Up to 1428 conditions per place. [2024-11-17 03:32:14,364 INFO L140 encePairwiseOnDemand]: 61/70 looper letters, 239 selfloop transitions, 35 changer transitions 0/299 dead transitions. [2024-11-17 03:32:14,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 299 transitions, 3456 flow [2024-11-17 03:32:14,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-17 03:32:14,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-11-17 03:32:14,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 727 transitions. [2024-11-17 03:32:14,366 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5769841269841269 [2024-11-17 03:32:14,366 INFO L175 Difference]: Start difference. First operand has 160 places, 107 transitions, 1111 flow. Second operand 18 states and 727 transitions. [2024-11-17 03:32:14,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 299 transitions, 3456 flow [2024-11-17 03:32:14,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 299 transitions, 3386 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-17 03:32:14,419 INFO L231 Difference]: Finished difference. Result has 175 places, 121 transitions, 1375 flow [2024-11-17 03:32:14,419 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=1063, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1375, PETRI_PLACES=175, PETRI_TRANSITIONS=121} [2024-11-17 03:32:14,420 INFO L277 CegarLoopForPetriNet]: 64 programPoint places, 111 predicate places. [2024-11-17 03:32:14,420 INFO L471 AbstractCegarLoop]: Abstraction has has 175 places, 121 transitions, 1375 flow [2024-11-17 03:32:14,421 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 34.0) internal successors, (646), 19 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:32:14,421 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:32:14,421 INFO L204 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2024-11-17 03:32:14,443 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-17 03:32:14,621 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-17 03:32:14,622 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-17 03:32:14,622 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:32:14,622 INFO L85 PathProgramCache]: Analyzing trace with hash -1657858070, now seen corresponding path program 1 times [2024-11-17 03:32:14,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:32:14,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352725103] [2024-11-17 03:32:14,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:32:14,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:32:14,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:32:14,775 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:32:14,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:32:14,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352725103] [2024-11-17 03:32:14,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352725103] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:32:14,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244518105] [2024-11-17 03:32:14,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:32:14,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:32:14,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:32:14,776 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:32:14,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-17 03:32:14,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:32:14,852 INFO L255 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-17 03:32:14,853 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:32:14,943 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:32:14,943 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:32:15,013 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:32:15,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244518105] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-17 03:32:15,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-17 03:32:15,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9, 6] total 15 [2024-11-17 03:32:15,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942381659] [2024-11-17 03:32:15,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:32:15,014 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-17 03:32:15,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:32:15,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-17 03:32:15,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2024-11-17 03:32:15,060 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 70 [2024-11-17 03:32:15,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 121 transitions, 1375 flow. Second operand has 7 states, 7 states have (on average 39.142857142857146) internal successors, (274), 7 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:32:15,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:32:15,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 70 [2024-11-17 03:32:15,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:32:15,842 INFO L124 PetriNetUnfolderBase]: 3677/8665 cut-off events. [2024-11-17 03:32:15,842 INFO L125 PetriNetUnfolderBase]: For 51375/52124 co-relation queries the response was YES. [2024-11-17 03:32:15,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31018 conditions, 8665 events. 3677/8665 cut-off events. For 51375/52124 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 80101 event pairs, 1557 based on Foata normal form. 192/8629 useless extension candidates. Maximal degree in co-relation 18165. Up to 3586 conditions per place. [2024-11-17 03:32:15,910 INFO L140 encePairwiseOnDemand]: 62/70 looper letters, 77 selfloop transitions, 35 changer transitions 0/142 dead transitions. [2024-11-17 03:32:15,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 142 transitions, 1828 flow [2024-11-17 03:32:15,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-17 03:32:15,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-17 03:32:15,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 296 transitions. [2024-11-17 03:32:15,912 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6040816326530613 [2024-11-17 03:32:15,912 INFO L175 Difference]: Start difference. First operand has 175 places, 121 transitions, 1375 flow. Second operand 7 states and 296 transitions. [2024-11-17 03:32:15,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 142 transitions, 1828 flow [2024-11-17 03:32:15,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 142 transitions, 1808 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-11-17 03:32:15,963 INFO L231 Difference]: Finished difference. Result has 178 places, 121 transitions, 1456 flow [2024-11-17 03:32:15,964 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=1355, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1456, PETRI_PLACES=178, PETRI_TRANSITIONS=121} [2024-11-17 03:32:15,964 INFO L277 CegarLoopForPetriNet]: 64 programPoint places, 114 predicate places. [2024-11-17 03:32:15,964 INFO L471 AbstractCegarLoop]: Abstraction has has 178 places, 121 transitions, 1456 flow [2024-11-17 03:32:15,965 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 39.142857142857146) internal successors, (274), 7 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:32:15,965 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:32:15,965 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:32:15,982 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-17 03:32:16,165 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-17 03:32:16,165 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting thread2Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-17 03:32:16,166 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:32:16,166 INFO L85 PathProgramCache]: Analyzing trace with hash 1324588908, now seen corresponding path program 3 times [2024-11-17 03:32:16,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:32:16,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774853655] [2024-11-17 03:32:16,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:32:16,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:32:16,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:32:16,317 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-17 03:32:16,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:32:16,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774853655] [2024-11-17 03:32:16,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774853655] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:32:16,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127374201] [2024-11-17 03:32:16,318 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-17 03:32:16,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:32:16,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:32:16,320 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:32:16,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-17 03:32:16,408 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-17 03:32:16,408 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:32:16,409 INFO L255 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-17 03:32:16,410 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:32:16,415 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 [2024-11-17 03:32:16,477 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-17 03:32:16,478 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 18 treesize of output 17 [2024-11-17 03:32:16,486 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-17 03:32:16,486 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 [2024-11-17 03:32:16,594 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-17 03:32:16,594 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:32:16,840 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 38 [2024-11-17 03:32:16,893 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-17 03:32:16,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127374201] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:32:16,894 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:32:16,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 23 [2024-11-17 03:32:16,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854802263] [2024-11-17 03:32:16,894 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:32:16,894 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-17 03:32:16,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:32:16,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-17 03:32:16,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2024-11-17 03:32:18,403 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 70 [2024-11-17 03:32:18,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 121 transitions, 1456 flow. Second operand has 24 states, 24 states have (on average 32.708333333333336) internal successors, (785), 24 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:32:18,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:32:18,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 70 [2024-11-17 03:32:18,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:32:20,149 INFO L124 PetriNetUnfolderBase]: 4907/10854 cut-off events. [2024-11-17 03:32:20,150 INFO L125 PetriNetUnfolderBase]: For 66370/66683 co-relation queries the response was YES. [2024-11-17 03:32:20,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37886 conditions, 10854 events. 4907/10854 cut-off events. For 66370/66683 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 96074 event pairs, 525 based on Foata normal form. 137/10963 useless extension candidates. Maximal degree in co-relation 23221. Up to 1710 conditions per place. [2024-11-17 03:32:20,372 INFO L140 encePairwiseOnDemand]: 58/70 looper letters, 230 selfloop transitions, 53 changer transitions 0/304 dead transitions. [2024-11-17 03:32:20,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 304 transitions, 3730 flow [2024-11-17 03:32:20,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-17 03:32:20,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-11-17 03:32:20,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 824 transitions. [2024-11-17 03:32:20,388 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.535064935064935 [2024-11-17 03:32:20,388 INFO L175 Difference]: Start difference. First operand has 178 places, 121 transitions, 1456 flow. Second operand 22 states and 824 transitions. [2024-11-17 03:32:20,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 304 transitions, 3730 flow [2024-11-17 03:32:20,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 304 transitions, 3536 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-11-17 03:32:20,484 INFO L231 Difference]: Finished difference. Result has 191 places, 137 transitions, 1736 flow [2024-11-17 03:32:20,485 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=1361, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1736, PETRI_PLACES=191, PETRI_TRANSITIONS=137} [2024-11-17 03:32:20,485 INFO L277 CegarLoopForPetriNet]: 64 programPoint places, 127 predicate places. [2024-11-17 03:32:20,485 INFO L471 AbstractCegarLoop]: Abstraction has has 191 places, 137 transitions, 1736 flow [2024-11-17 03:32:20,486 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 32.708333333333336) internal successors, (785), 24 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:32:20,486 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:32:20,486 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:32:20,504 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-17 03:32:20,686 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-17 03:32:20,687 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-17 03:32:20,687 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:32:20,687 INFO L85 PathProgramCache]: Analyzing trace with hash -721464857, now seen corresponding path program 2 times [2024-11-17 03:32:20,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:32:20,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497614650] [2024-11-17 03:32:20,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:32:20,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:32:20,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:32:20,947 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-17 03:32:20,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:32:20,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497614650] [2024-11-17 03:32:20,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497614650] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:32:20,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707571878] [2024-11-17 03:32:20,948 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-17 03:32:20,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:32:20,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:32:20,950 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:32:20,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-17 03:32:21,070 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-17 03:32:21,070 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:32:21,072 INFO L255 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-17 03:32:21,073 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:32:21,134 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 [2024-11-17 03:32:21,493 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-17 03:32:21,493 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:32:22,117 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-17 03:32:22,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707571878] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:32:22,117 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:32:22,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 19 [2024-11-17 03:32:22,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089126545] [2024-11-17 03:32:22,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:32:22,118 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-17 03:32:22,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:32:22,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-17 03:32:22,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2024-11-17 03:32:22,917 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 70 [2024-11-17 03:32:22,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 137 transitions, 1736 flow. Second operand has 19 states, 19 states have (on average 35.1578947368421) internal successors, (668), 19 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:32:22,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:32:22,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 70 [2024-11-17 03:32:22,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:32:25,249 INFO L124 PetriNetUnfolderBase]: 7344/14501 cut-off events. [2024-11-17 03:32:25,249 INFO L125 PetriNetUnfolderBase]: For 90128/91663 co-relation queries the response was YES. [2024-11-17 03:32:25,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54513 conditions, 14501 events. 7344/14501 cut-off events. For 90128/91663 co-relation queries the response was YES. Maximal size of possible extension queue 710. Compared 134208 event pairs, 630 based on Foata normal form. 96/14312 useless extension candidates. Maximal degree in co-relation 46380. Up to 3599 conditions per place. [2024-11-17 03:32:25,339 INFO L140 encePairwiseOnDemand]: 60/70 looper letters, 260 selfloop transitions, 69 changer transitions 0/350 dead transitions. [2024-11-17 03:32:25,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 350 transitions, 5028 flow [2024-11-17 03:32:25,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-17 03:32:25,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-11-17 03:32:25,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 758 transitions. [2024-11-17 03:32:25,341 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5699248120300752 [2024-11-17 03:32:25,341 INFO L175 Difference]: Start difference. First operand has 191 places, 137 transitions, 1736 flow. Second operand 19 states and 758 transitions. [2024-11-17 03:32:25,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 350 transitions, 5028 flow [2024-11-17 03:32:25,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 350 transitions, 4820 flow, removed 5 selfloop flow, removed 11 redundant places. [2024-11-17 03:32:25,414 INFO L231 Difference]: Finished difference. Result has 200 places, 164 transitions, 2279 flow [2024-11-17 03:32:25,415 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=1635, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2279, PETRI_PLACES=200, PETRI_TRANSITIONS=164} [2024-11-17 03:32:25,415 INFO L277 CegarLoopForPetriNet]: 64 programPoint places, 136 predicate places. [2024-11-17 03:32:25,415 INFO L471 AbstractCegarLoop]: Abstraction has has 200 places, 164 transitions, 2279 flow [2024-11-17 03:32:25,415 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 35.1578947368421) internal successors, (668), 19 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:32:25,415 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:32:25,416 INFO L204 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:32:25,428 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-17 03:32:25,616 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-17 03:32:25,616 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-17 03:32:25,617 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:32:25,617 INFO L85 PathProgramCache]: Analyzing trace with hash 321446106, now seen corresponding path program 1 times [2024-11-17 03:32:25,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:32:25,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978018737] [2024-11-17 03:32:25,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:32:25,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:32:25,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:32:25,849 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-17 03:32:25,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:32:25,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978018737] [2024-11-17 03:32:25,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978018737] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:32:25,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634186521] [2024-11-17 03:32:25,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:32:25,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:32:25,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:32:25,851 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:32:25,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-17 03:32:25,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:32:25,929 INFO L255 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-17 03:32:25,930 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:32:26,068 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-17 03:32:26,068 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:32:26,200 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-17 03:32:26,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634186521] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:32:26,200 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:32:26,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2024-11-17 03:32:26,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894093929] [2024-11-17 03:32:26,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:32:26,201 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-17 03:32:26,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:32:26,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-17 03:32:26,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2024-11-17 03:32:26,406 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 70 [2024-11-17 03:32:26,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 164 transitions, 2279 flow. Second operand has 23 states, 23 states have (on average 39.82608695652174) internal successors, (916), 23 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:32:26,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:32:26,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 70 [2024-11-17 03:32:26,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:32:28,373 INFO L124 PetriNetUnfolderBase]: 4200/10903 cut-off events. [2024-11-17 03:32:28,373 INFO L125 PetriNetUnfolderBase]: For 68574/69554 co-relation queries the response was YES. [2024-11-17 03:32:28,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38636 conditions, 10903 events. 4200/10903 cut-off events. For 68574/69554 co-relation queries the response was YES. Maximal size of possible extension queue 525. Compared 113403 event pairs, 2148 based on Foata normal form. 1/10437 useless extension candidates. Maximal degree in co-relation 33267. Up to 6312 conditions per place. [2024-11-17 03:32:28,435 INFO L140 encePairwiseOnDemand]: 56/70 looper letters, 115 selfloop transitions, 67 changer transitions 1/224 dead transitions. [2024-11-17 03:32:28,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 224 transitions, 2898 flow [2024-11-17 03:32:28,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-17 03:32:28,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-11-17 03:32:28,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 906 transitions. [2024-11-17 03:32:28,437 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6163265306122448 [2024-11-17 03:32:28,437 INFO L175 Difference]: Start difference. First operand has 200 places, 164 transitions, 2279 flow. Second operand 21 states and 906 transitions. [2024-11-17 03:32:28,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 224 transitions, 2898 flow [2024-11-17 03:32:28,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 224 transitions, 2844 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-11-17 03:32:28,503 INFO L231 Difference]: Finished difference. Result has 218 places, 173 transitions, 2483 flow [2024-11-17 03:32:28,503 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=2231, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2483, PETRI_PLACES=218, PETRI_TRANSITIONS=173} [2024-11-17 03:32:28,503 INFO L277 CegarLoopForPetriNet]: 64 programPoint places, 154 predicate places. [2024-11-17 03:32:28,503 INFO L471 AbstractCegarLoop]: Abstraction has has 218 places, 173 transitions, 2483 flow [2024-11-17 03:32:28,504 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 39.82608695652174) internal successors, (916), 23 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:32:28,504 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:32:28,504 INFO L204 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:32:28,549 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-11-17 03:32:28,704 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:32:28,704 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-17 03:32:28,705 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:32:28,705 INFO L85 PathProgramCache]: Analyzing trace with hash 1617606736, now seen corresponding path program 1 times [2024-11-17 03:32:28,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:32:28,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564361128] [2024-11-17 03:32:28,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:32:28,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:32:28,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:32:29,135 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-17 03:32:29,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:32:29,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564361128] [2024-11-17 03:32:29,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564361128] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:32:29,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813797779] [2024-11-17 03:32:29,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:32:29,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:32:29,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:32:29,138 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:32:29,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-17 03:32:29,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:32:29,231 INFO L255 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-17 03:32:29,232 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:32:29,337 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-17 03:32:29,337 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:32:29,449 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-11-17 03:32:29,449 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2024-11-17 03:32:29,467 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-17 03:32:29,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813797779] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:32:29,467 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:32:29,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 24 [2024-11-17 03:32:29,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146879714] [2024-11-17 03:32:29,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:32:29,468 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-17 03:32:29,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:32:29,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-17 03:32:29,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2024-11-17 03:32:30,325 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 70 [2024-11-17 03:32:30,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 173 transitions, 2483 flow. Second operand has 24 states, 24 states have (on average 38.166666666666664) internal successors, (916), 24 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:32:30,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:32:30,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 70 [2024-11-17 03:32:30,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:32:33,359 INFO L124 PetriNetUnfolderBase]: 8623/18490 cut-off events. [2024-11-17 03:32:33,359 INFO L125 PetriNetUnfolderBase]: For 99982/100064 co-relation queries the response was YES. [2024-11-17 03:32:33,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69637 conditions, 18490 events. 8623/18490 cut-off events. For 99982/100064 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 175034 event pairs, 615 based on Foata normal form. 202/18650 useless extension candidates. Maximal degree in co-relation 63471. Up to 8042 conditions per place. [2024-11-17 03:32:33,498 INFO L140 encePairwiseOnDemand]: 57/70 looper letters, 258 selfloop transitions, 71 changer transitions 3/360 dead transitions. [2024-11-17 03:32:33,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 360 transitions, 5230 flow [2024-11-17 03:32:33,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-17 03:32:33,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-17 03:32:33,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 539 transitions. [2024-11-17 03:32:33,500 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6416666666666667 [2024-11-17 03:32:33,500 INFO L175 Difference]: Start difference. First operand has 218 places, 173 transitions, 2483 flow. Second operand 12 states and 539 transitions. [2024-11-17 03:32:33,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 360 transitions, 5230 flow [2024-11-17 03:32:33,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 360 transitions, 5127 flow, removed 5 selfloop flow, removed 14 redundant places. [2024-11-17 03:32:33,720 INFO L231 Difference]: Finished difference. Result has 220 places, 189 transitions, 2853 flow [2024-11-17 03:32:33,720 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=2380, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2853, PETRI_PLACES=220, PETRI_TRANSITIONS=189} [2024-11-17 03:32:33,721 INFO L277 CegarLoopForPetriNet]: 64 programPoint places, 156 predicate places. [2024-11-17 03:32:33,721 INFO L471 AbstractCegarLoop]: Abstraction has has 220 places, 189 transitions, 2853 flow [2024-11-17 03:32:33,721 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 38.166666666666664) internal successors, (916), 24 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:32:33,721 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:32:33,721 INFO L204 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:32:33,734 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-17 03:32:33,922 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:32:33,922 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-17 03:32:33,922 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:32:33,923 INFO L85 PathProgramCache]: Analyzing trace with hash 1939991634, now seen corresponding path program 2 times [2024-11-17 03:32:33,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:32:33,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519507666] [2024-11-17 03:32:33,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:32:33,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:32:33,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:32:34,407 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-17 03:32:34,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:32:34,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519507666] [2024-11-17 03:32:34,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519507666] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:32:34,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:32:34,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-11-17 03:32:34,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745417535] [2024-11-17 03:32:34,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:32:34,408 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-17 03:32:34,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:32:34,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-17 03:32:34,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-11-17 03:32:34,750 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 70 [2024-11-17 03:32:34,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 189 transitions, 2853 flow. Second operand has 13 states, 13 states have (on average 37.92307692307692) internal successors, (493), 13 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:32:34,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:32:34,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 70 [2024-11-17 03:32:34,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:32:37,722 INFO L124 PetriNetUnfolderBase]: 9179/19759 cut-off events. [2024-11-17 03:32:37,722 INFO L125 PetriNetUnfolderBase]: For 132113/132207 co-relation queries the response was YES. [2024-11-17 03:32:37,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79942 conditions, 19759 events. 9179/19759 cut-off events. For 132113/132207 co-relation queries the response was YES. Maximal size of possible extension queue 665. Compared 189516 event pairs, 4896 based on Foata normal form. 148/19721 useless extension candidates. Maximal degree in co-relation 73807. Up to 9247 conditions per place. [2024-11-17 03:32:37,915 INFO L140 encePairwiseOnDemand]: 58/70 looper letters, 205 selfloop transitions, 109 changer transitions 0/342 dead transitions. [2024-11-17 03:32:37,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 342 transitions, 5344 flow [2024-11-17 03:32:37,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-17 03:32:37,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-17 03:32:37,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 492 transitions. [2024-11-17 03:32:37,916 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.638961038961039 [2024-11-17 03:32:37,916 INFO L175 Difference]: Start difference. First operand has 220 places, 189 transitions, 2853 flow. Second operand 11 states and 492 transitions. [2024-11-17 03:32:37,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 342 transitions, 5344 flow [2024-11-17 03:32:38,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 342 transitions, 5058 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-11-17 03:32:38,370 INFO L231 Difference]: Finished difference. Result has 230 places, 246 transitions, 4030 flow [2024-11-17 03:32:38,371 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=2675, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4030, PETRI_PLACES=230, PETRI_TRANSITIONS=246} [2024-11-17 03:32:38,371 INFO L277 CegarLoopForPetriNet]: 64 programPoint places, 166 predicate places. [2024-11-17 03:32:38,371 INFO L471 AbstractCegarLoop]: Abstraction has has 230 places, 246 transitions, 4030 flow [2024-11-17 03:32:38,371 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 37.92307692307692) internal successors, (493), 13 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:32:38,371 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:32:38,372 INFO L204 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:32:38,372 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-11-17 03:32:38,372 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-17 03:32:38,372 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:32:38,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1645596508, now seen corresponding path program 3 times [2024-11-17 03:32:38,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:32:38,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788085988] [2024-11-17 03:32:38,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:32:38,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:32:38,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:32:38,708 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-17 03:32:38,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:32:38,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788085988] [2024-11-17 03:32:38,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788085988] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:32:38,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077280649] [2024-11-17 03:32:38,708 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-17 03:32:38,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:32:38,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:32:38,713 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:32:38,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-17 03:32:38,809 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-17 03:32:38,809 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:32:38,810 INFO L255 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-17 03:32:38,811 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:32:38,949 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-17 03:32:38,949 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 26 treesize of output 10 [2024-11-17 03:32:38,957 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-17 03:32:38,957 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:32:39,097 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-11-17 03:32:39,098 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2024-11-17 03:32:39,125 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-17 03:32:39,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077280649] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:32:39,125 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:32:39,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 22 [2024-11-17 03:32:39,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61825490] [2024-11-17 03:32:39,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:32:39,126 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-17 03:32:39,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:32:39,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-17 03:32:39,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2024-11-17 03:32:39,987 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 70 [2024-11-17 03:32:39,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 246 transitions, 4030 flow. Second operand has 22 states, 22 states have (on average 38.27272727272727) internal successors, (842), 22 states have internal predecessors, (842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:32:39,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:32:39,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 70 [2024-11-17 03:32:39,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:32:44,303 INFO L124 PetriNetUnfolderBase]: 11875/25454 cut-off events. [2024-11-17 03:32:44,303 INFO L125 PetriNetUnfolderBase]: For 168575/168729 co-relation queries the response was YES. [2024-11-17 03:32:44,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106482 conditions, 25454 events. 11875/25454 cut-off events. For 168575/168729 co-relation queries the response was YES. Maximal size of possible extension queue 800. Compared 250391 event pairs, 3880 based on Foata normal form. 274/25564 useless extension candidates. Maximal degree in co-relation 96439. Up to 6711 conditions per place. [2024-11-17 03:32:44,580 INFO L140 encePairwiseOnDemand]: 57/70 looper letters, 330 selfloop transitions, 182 changer transitions 4/544 dead transitions. [2024-11-17 03:32:44,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 544 transitions, 9281 flow [2024-11-17 03:32:44,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-17 03:32:44,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-17 03:32:44,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 643 transitions. [2024-11-17 03:32:44,581 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6561224489795918 [2024-11-17 03:32:44,581 INFO L175 Difference]: Start difference. First operand has 230 places, 246 transitions, 4030 flow. Second operand 14 states and 643 transitions. [2024-11-17 03:32:44,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 544 transitions, 9281 flow [2024-11-17 03:32:45,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 544 transitions, 8866 flow, removed 96 selfloop flow, removed 4 redundant places. [2024-11-17 03:32:45,408 INFO L231 Difference]: Finished difference. Result has 246 places, 321 transitions, 6004 flow [2024-11-17 03:32:45,408 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=3829, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=6004, PETRI_PLACES=246, PETRI_TRANSITIONS=321} [2024-11-17 03:32:45,409 INFO L277 CegarLoopForPetriNet]: 64 programPoint places, 182 predicate places. [2024-11-17 03:32:45,409 INFO L471 AbstractCegarLoop]: Abstraction has has 246 places, 321 transitions, 6004 flow [2024-11-17 03:32:45,409 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 38.27272727272727) internal successors, (842), 22 states have internal predecessors, (842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:32:45,409 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:32:45,410 INFO L204 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:32:45,422 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-11-17 03:32:45,610 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:32:45,610 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-17 03:32:45,611 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:32:45,611 INFO L85 PathProgramCache]: Analyzing trace with hash -371980400, now seen corresponding path program 4 times [2024-11-17 03:32:45,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:32:45,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713494456] [2024-11-17 03:32:45,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:32:45,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:32:45,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:32:46,073 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-17 03:32:46,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:32:46,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713494456] [2024-11-17 03:32:46,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713494456] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:32:46,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:32:46,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-11-17 03:32:46,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810501432] [2024-11-17 03:32:46,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:32:46,075 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-17 03:32:46,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:32:46,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-17 03:32:46,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2024-11-17 03:32:46,395 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 70 [2024-11-17 03:32:46,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 321 transitions, 6004 flow. Second operand has 13 states, 13 states have (on average 37.92307692307692) internal successors, (493), 13 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:32:46,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:32:46,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 70 [2024-11-17 03:32:46,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:32:51,277 INFO L124 PetriNetUnfolderBase]: 12204/25824 cut-off events. [2024-11-17 03:32:51,277 INFO L125 PetriNetUnfolderBase]: For 209364/209582 co-relation queries the response was YES. [2024-11-17 03:32:51,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117097 conditions, 25824 events. 12204/25824 cut-off events. For 209364/209582 co-relation queries the response was YES. Maximal size of possible extension queue 836. Compared 253107 event pairs, 7023 based on Foata normal form. 244/25865 useless extension candidates. Maximal degree in co-relation 106706. Up to 13766 conditions per place. [2024-11-17 03:32:51,565 INFO L140 encePairwiseOnDemand]: 58/70 looper letters, 233 selfloop transitions, 183 changer transitions 0/444 dead transitions. [2024-11-17 03:32:51,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 444 transitions, 8433 flow [2024-11-17 03:32:51,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-17 03:32:51,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-17 03:32:51,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 492 transitions. [2024-11-17 03:32:51,566 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.638961038961039 [2024-11-17 03:32:51,566 INFO L175 Difference]: Start difference. First operand has 246 places, 321 transitions, 6004 flow. Second operand 11 states and 492 transitions. [2024-11-17 03:32:51,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 444 transitions, 8433 flow [2024-11-17 03:32:52,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 444 transitions, 8085 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-11-17 03:32:52,311 INFO L231 Difference]: Finished difference. Result has 253 places, 357 transitions, 6939 flow [2024-11-17 03:32:52,312 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=5750, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6939, PETRI_PLACES=253, PETRI_TRANSITIONS=357} [2024-11-17 03:32:52,312 INFO L277 CegarLoopForPetriNet]: 64 programPoint places, 189 predicate places. [2024-11-17 03:32:52,312 INFO L471 AbstractCegarLoop]: Abstraction has has 253 places, 357 transitions, 6939 flow [2024-11-17 03:32:52,312 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 37.92307692307692) internal successors, (493), 13 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:32:52,312 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:32:52,312 INFO L204 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:32:52,313 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-11-17 03:32:52,313 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-17 03:32:52,313 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:32:52,313 INFO L85 PathProgramCache]: Analyzing trace with hash -949543398, now seen corresponding path program 5 times [2024-11-17 03:32:52,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:32:52,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136759346] [2024-11-17 03:32:52,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:32:52,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:32:52,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:32:52,648 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-17 03:32:52,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:32:52,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136759346] [2024-11-17 03:32:52,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136759346] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:32:52,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504545534] [2024-11-17 03:32:52,649 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-17 03:32:52,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:32:52,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:32:52,652 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:32:52,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-17 03:32:52,739 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-17 03:32:52,739 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:32:52,740 INFO L255 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-17 03:32:52,742 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:32:52,897 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-17 03:32:52,898 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:32:53,015 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-11-17 03:32:53,016 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2024-11-17 03:32:53,036 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-17 03:32:53,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504545534] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:32:53,036 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:32:53,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 22 [2024-11-17 03:32:53,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151620811] [2024-11-17 03:32:53,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:32:53,037 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-17 03:32:53,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:32:53,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-17 03:32:53,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2024-11-17 03:32:54,106 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 70 [2024-11-17 03:32:54,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 357 transitions, 6939 flow. Second operand has 22 states, 22 states have (on average 38.27272727272727) internal successors, (842), 22 states have internal predecessors, (842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:32:54,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:32:54,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 70 [2024-11-17 03:32:54,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand