./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/unroll-5.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/unroll-5.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 624ca078114fa3c35bb1960efece3c50cba0d03b97522c4936fd5f6e5d783f29 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-3289d67-m [2024-11-17 03:42:42,884 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-17 03:42:42,967 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-17 03:42:42,971 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-17 03:42:42,974 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-17 03:42:43,007 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-17 03:42:43,008 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-17 03:42:43,009 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-17 03:42:43,009 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-17 03:42:43,010 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-17 03:42:43,010 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-17 03:42:43,011 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-17 03:42:43,012 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-17 03:42:43,014 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-17 03:42:43,015 INFO L153 SettingsManager]: * Use SBE=true [2024-11-17 03:42:43,015 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-17 03:42:43,016 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-17 03:42:43,016 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-17 03:42:43,016 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-17 03:42:43,016 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-17 03:42:43,017 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-17 03:42:43,017 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-17 03:42:43,018 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-17 03:42:43,018 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-17 03:42:43,018 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-17 03:42:43,019 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-17 03:42:43,019 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-17 03:42:43,019 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-17 03:42:43,020 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-17 03:42:43,020 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-17 03:42:43,020 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-17 03:42:43,021 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-17 03:42:43,021 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-17 03:42:43,021 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-17 03:42:43,022 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-17 03:42:43,022 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-17 03:42:43,022 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-17 03:42:43,023 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-17 03:42:43,023 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-17 03:42:43,023 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-17 03:42:43,024 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-17 03:42:43,024 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-17 03:42:43,024 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 624ca078114fa3c35bb1960efece3c50cba0d03b97522c4936fd5f6e5d783f29 [2024-11-17 03:42:43,285 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-17 03:42:43,310 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-17 03:42:43,314 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-17 03:42:43,315 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-17 03:42:43,315 INFO L274 PluginConnector]: CDTParser initialized [2024-11-17 03:42:43,317 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/unroll-5.wvr.c [2024-11-17 03:42:44,809 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-17 03:42:44,985 INFO L384 CDTParser]: Found 1 translation units. [2024-11-17 03:42:44,986 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/unroll-5.wvr.c [2024-11-17 03:42:44,993 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/642be52a3/3d9d626f3d504daba039518af8423065/FLAGd6c312b90 [2024-11-17 03:42:45,007 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/642be52a3/3d9d626f3d504daba039518af8423065 [2024-11-17 03:42:45,011 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-17 03:42:45,013 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-17 03:42:45,015 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-17 03:42:45,015 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-17 03:42:45,019 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-17 03:42:45,020 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:42:45" (1/1) ... [2024-11-17 03:42:45,021 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19e6bb3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:42:45, skipping insertion in model container [2024-11-17 03:42:45,021 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:42:45" (1/1) ... [2024-11-17 03:42:45,042 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-17 03:42:45,277 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 03:42:45,280 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-17 03:42:45,292 INFO L200 MainTranslator]: Completed pre-run [2024-11-17 03:42:45,319 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-17 03:42:45,336 INFO L204 MainTranslator]: Completed translation [2024-11-17 03:42:45,337 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:42:45 WrapperNode [2024-11-17 03:42:45,337 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-17 03:42:45,338 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-17 03:42:45,338 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-17 03:42:45,339 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-17 03:42:45,345 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:42:45" (1/1) ... [2024-11-17 03:42:45,353 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:42:45" (1/1) ... [2024-11-17 03:42:45,377 INFO L138 Inliner]: procedures = 23, calls = 29, calls flagged for inlining = 15, calls inlined = 15, statements flattened = 156 [2024-11-17 03:42:45,378 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-17 03:42:45,378 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-17 03:42:45,379 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-17 03:42:45,379 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-17 03:42:45,389 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:42:45" (1/1) ... [2024-11-17 03:42:45,389 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:42:45" (1/1) ... [2024-11-17 03:42:45,392 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:42:45" (1/1) ... [2024-11-17 03:42:45,406 INFO L175 MemorySlicer]: Split 9 memory accesses to 2 slices as follows [2, 7]. 78 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-11-17 03:42:45,407 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:42:45" (1/1) ... [2024-11-17 03:42:45,407 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:42:45" (1/1) ... [2024-11-17 03:42:45,414 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:42:45" (1/1) ... [2024-11-17 03:42:45,415 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:42:45" (1/1) ... [2024-11-17 03:42:45,416 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:42:45" (1/1) ... [2024-11-17 03:42:45,418 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:42:45" (1/1) ... [2024-11-17 03:42:45,420 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-17 03:42:45,421 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-17 03:42:45,421 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-17 03:42:45,421 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-17 03:42:45,425 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:42:45" (1/1) ... [2024-11-17 03:42:45,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-17 03:42:45,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:42:45,462 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 03:42:45,465 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 03:42:45,504 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-17 03:42:45,504 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-17 03:42:45,504 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-17 03:42:45,504 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-17 03:42:45,505 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-17 03:42:45,505 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-17 03:42:45,505 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-17 03:42:45,505 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-17 03:42:45,505 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-17 03:42:45,505 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-17 03:42:45,505 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-17 03:42:45,505 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-17 03:42:45,506 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-17 03:42:45,506 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-17 03:42:45,507 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 03:42:45,601 INFO L256 CfgBuilder]: Building ICFG [2024-11-17 03:42:45,603 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-17 03:42:45,953 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-17 03:42:45,953 INFO L307 CfgBuilder]: Performing block encoding [2024-11-17 03:42:46,194 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-17 03:42:46,194 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-17 03:42:46,195 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.11 03:42:46 BoogieIcfgContainer [2024-11-17 03:42:46,195 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-17 03:42:46,197 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-17 03:42:46,198 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-17 03:42:46,201 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-17 03:42:46,201 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 03:42:45" (1/3) ... [2024-11-17 03:42:46,202 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@345f9ef4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:42:46, skipping insertion in model container [2024-11-17 03:42:46,202 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:42:45" (2/3) ... [2024-11-17 03:42:46,202 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@345f9ef4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:42:46, skipping insertion in model container [2024-11-17 03:42:46,202 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.11 03:42:46" (3/3) ... [2024-11-17 03:42:46,203 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-5.wvr.c [2024-11-17 03:42:46,222 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-17 03:42:46,223 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2024-11-17 03:42:46,223 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-17 03:42:46,291 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-17 03:42:46,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 53 places, 52 transitions, 118 flow [2024-11-17 03:42:46,361 INFO L124 PetriNetUnfolderBase]: 6/50 cut-off events. [2024-11-17 03:42:46,365 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-17 03:42:46,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59 conditions, 50 events. 6/50 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 89 event pairs, 0 based on Foata normal form. 0/28 useless extension candidates. Maximal degree in co-relation 35. Up to 2 conditions per place. [2024-11-17 03:42:46,369 INFO L82 GeneralOperation]: Start removeDead. Operand has 53 places, 52 transitions, 118 flow [2024-11-17 03:42:46,374 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 50 places, 49 transitions, 110 flow [2024-11-17 03:42:46,387 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-17 03:42:46,394 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;@5e7a59b7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-17 03:42:46,395 INFO L334 AbstractCegarLoop]: Starting to check reachability of 30 error locations. [2024-11-17 03:42:46,399 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-17 03:42:46,399 INFO L124 PetriNetUnfolderBase]: 2/7 cut-off events. [2024-11-17 03:42:46,399 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-17 03:42:46,399 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:42:46,400 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-17 03:42:46,403 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-17 03:42:46,407 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:42:46,408 INFO L85 PathProgramCache]: Analyzing trace with hash 14438123, now seen corresponding path program 1 times [2024-11-17 03:42:46,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:42:46,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316608174] [2024-11-17 03:42:46,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:42:46,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:42:46,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:42:46,650 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 03:42:46,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:42:46,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316608174] [2024-11-17 03:42:46,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316608174] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:42:46,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:42:46,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-17 03:42:46,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134463530] [2024-11-17 03:42:46,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:42:46,665 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-17 03:42:46,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:42:46,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-17 03:42:46,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-17 03:42:46,724 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 52 [2024-11-17 03:42:46,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 49 transitions, 110 flow. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 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 03:42:46,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:42:46,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 52 [2024-11-17 03:42:46,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:42:46,889 INFO L124 PetriNetUnfolderBase]: 114/311 cut-off events. [2024-11-17 03:42:46,893 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2024-11-17 03:42:46,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 533 conditions, 311 events. 114/311 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1602 event pairs, 86 based on Foata normal form. 29/291 useless extension candidates. Maximal degree in co-relation 464. Up to 197 conditions per place. [2024-11-17 03:42:46,898 INFO L140 encePairwiseOnDemand]: 45/52 looper letters, 21 selfloop transitions, 2 changer transitions 0/43 dead transitions. [2024-11-17 03:42:46,900 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 43 transitions, 144 flow [2024-11-17 03:42:46,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:42:46,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:42:46,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 97 transitions. [2024-11-17 03:42:46,915 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6217948717948718 [2024-11-17 03:42:46,918 INFO L175 Difference]: Start difference. First operand has 50 places, 49 transitions, 110 flow. Second operand 3 states and 97 transitions. [2024-11-17 03:42:46,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 43 transitions, 144 flow [2024-11-17 03:42:46,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 43 transitions, 136 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-17 03:42:46,925 INFO L231 Difference]: Finished difference. Result has 45 places, 43 transitions, 94 flow [2024-11-17 03:42:46,927 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=94, PETRI_PLACES=45, PETRI_TRANSITIONS=43} [2024-11-17 03:42:46,932 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, -5 predicate places. [2024-11-17 03:42:46,932 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 43 transitions, 94 flow [2024-11-17 03:42:46,933 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 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 03:42:46,933 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:42:46,933 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-17 03:42:46,933 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-17 03:42:46,933 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-17 03:42:46,934 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:42:46,934 INFO L85 PathProgramCache]: Analyzing trace with hash 14438124, now seen corresponding path program 1 times [2024-11-17 03:42:46,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:42:46,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868691385] [2024-11-17 03:42:46,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:42:46,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:42:46,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:42:47,266 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 03:42:47,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:42:47,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868691385] [2024-11-17 03:42:47,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868691385] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:42:47,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:42:47,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-17 03:42:47,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630745791] [2024-11-17 03:42:47,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:42:47,269 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 03:42:47,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:42:47,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 03:42:47,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-17 03:42:47,335 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 52 [2024-11-17 03:42:47,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 43 transitions, 94 flow. Second operand has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 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 03:42:47,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:42:47,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 52 [2024-11-17 03:42:47,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:42:47,477 INFO L124 PetriNetUnfolderBase]: 115/316 cut-off events. [2024-11-17 03:42:47,478 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2024-11-17 03:42:47,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 530 conditions, 316 events. 115/316 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1616 event pairs, 86 based on Foata normal form. 0/266 useless extension candidates. Maximal degree in co-relation 504. Up to 202 conditions per place. [2024-11-17 03:42:47,481 INFO L140 encePairwiseOnDemand]: 48/52 looper letters, 24 selfloop transitions, 3 changer transitions 0/46 dead transitions. [2024-11-17 03:42:47,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 46 transitions, 156 flow [2024-11-17 03:42:47,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:42:47,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:42:47,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 97 transitions. [2024-11-17 03:42:47,484 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6217948717948718 [2024-11-17 03:42:47,484 INFO L175 Difference]: Start difference. First operand has 45 places, 43 transitions, 94 flow. Second operand 3 states and 97 transitions. [2024-11-17 03:42:47,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 46 transitions, 156 flow [2024-11-17 03:42:47,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 46 transitions, 150 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:42:47,489 INFO L231 Difference]: Finished difference. Result has 46 places, 45 transitions, 109 flow [2024-11-17 03:42:47,489 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=109, PETRI_PLACES=46, PETRI_TRANSITIONS=45} [2024-11-17 03:42:47,490 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, -4 predicate places. [2024-11-17 03:42:47,490 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 45 transitions, 109 flow [2024-11-17 03:42:47,491 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 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 03:42:47,491 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:42:47,491 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1] [2024-11-17 03:42:47,491 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-17 03:42:47,492 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-17 03:42:47,492 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:42:47,493 INFO L85 PathProgramCache]: Analyzing trace with hash 629888629, now seen corresponding path program 1 times [2024-11-17 03:42:47,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:42:47,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386440302] [2024-11-17 03:42:47,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:42:47,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:42:47,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:42:47,772 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 03:42:47,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:42:47,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386440302] [2024-11-17 03:42:47,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386440302] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:42:47,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246946705] [2024-11-17 03:42:47,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:42:47,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:42:47,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:42:47,777 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 03:42:47,779 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 03:42:47,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:42:47,853 INFO L255 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-17 03:42:47,858 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:42:47,939 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 03:42:48,192 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:42:48,192 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:42:48,388 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 03:42:48,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246946705] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:42:48,389 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:42:48,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-17 03:42:48,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892307251] [2024-11-17 03:42:48,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:42:48,390 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-17 03:42:48,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:42:48,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-17 03:42:48,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-11-17 03:42:48,613 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 52 [2024-11-17 03:42:48,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 45 transitions, 109 flow. Second operand has 11 states, 11 states have (on average 23.363636363636363) internal successors, (257), 11 states have internal predecessors, (257), 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 03:42:48,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:42:48,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 52 [2024-11-17 03:42:48,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:42:48,856 INFO L124 PetriNetUnfolderBase]: 115/315 cut-off events. [2024-11-17 03:42:48,856 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-11-17 03:42:48,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 535 conditions, 315 events. 115/315 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1620 event pairs, 86 based on Foata normal form. 0/264 useless extension candidates. Maximal degree in co-relation 504. Up to 198 conditions per place. [2024-11-17 03:42:48,860 INFO L140 encePairwiseOnDemand]: 47/52 looper letters, 22 selfloop transitions, 6 changer transitions 0/46 dead transitions. [2024-11-17 03:42:48,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 46 transitions, 165 flow [2024-11-17 03:42:48,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-17 03:42:48,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-17 03:42:48,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 139 transitions. [2024-11-17 03:42:48,865 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5346153846153846 [2024-11-17 03:42:48,865 INFO L175 Difference]: Start difference. First operand has 46 places, 45 transitions, 109 flow. Second operand 5 states and 139 transitions. [2024-11-17 03:42:48,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 46 transitions, 165 flow [2024-11-17 03:42:48,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 46 transitions, 162 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-17 03:42:48,868 INFO L231 Difference]: Finished difference. Result has 49 places, 45 transitions, 122 flow [2024-11-17 03:42:48,869 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=122, PETRI_PLACES=49, PETRI_TRANSITIONS=45} [2024-11-17 03:42:48,870 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, -1 predicate places. [2024-11-17 03:42:48,870 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 45 transitions, 122 flow [2024-11-17 03:42:48,871 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 23.363636363636363) internal successors, (257), 11 states have internal predecessors, (257), 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 03:42:48,871 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:42:48,871 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:42:48,888 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-17 03:42:49,072 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:42:49,073 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-17 03:42:49,073 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:42:49,073 INFO L85 PathProgramCache]: Analyzing trace with hash -759340136, now seen corresponding path program 1 times [2024-11-17 03:42:49,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:42:49,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651813812] [2024-11-17 03:42:49,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:42:49,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:42:49,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:42:49,163 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 03:42:49,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:42:49,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651813812] [2024-11-17 03:42:49,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651813812] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:42:49,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:42:49,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-17 03:42:49,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137474335] [2024-11-17 03:42:49,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:42:49,166 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 03:42:49,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:42:49,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 03:42:49,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-17 03:42:49,210 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 52 [2024-11-17 03:42:49,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 45 transitions, 122 flow. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:42:49,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:42:49,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 52 [2024-11-17 03:42:49,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:42:49,277 INFO L124 PetriNetUnfolderBase]: 115/271 cut-off events. [2024-11-17 03:42:49,278 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-11-17 03:42:49,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 497 conditions, 271 events. 115/271 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1185 event pairs, 86 based on Foata normal form. 0/266 useless extension candidates. Maximal degree in co-relation 470. Up to 197 conditions per place. [2024-11-17 03:42:49,280 INFO L140 encePairwiseOnDemand]: 44/52 looper letters, 23 selfloop transitions, 3 changer transitions 0/39 dead transitions. [2024-11-17 03:42:49,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 39 transitions, 162 flow [2024-11-17 03:42:49,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-17 03:42:49,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-17 03:42:49,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 97 transitions. [2024-11-17 03:42:49,282 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.46634615384615385 [2024-11-17 03:42:49,282 INFO L175 Difference]: Start difference. First operand has 49 places, 45 transitions, 122 flow. Second operand 4 states and 97 transitions. [2024-11-17 03:42:49,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 39 transitions, 162 flow [2024-11-17 03:42:49,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 39 transitions, 149 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-11-17 03:42:49,283 INFO L231 Difference]: Finished difference. Result has 43 places, 39 transitions, 103 flow [2024-11-17 03:42:49,284 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=97, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=103, PETRI_PLACES=43, PETRI_TRANSITIONS=39} [2024-11-17 03:42:49,285 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, -7 predicate places. [2024-11-17 03:42:49,285 INFO L471 AbstractCegarLoop]: Abstraction has has 43 places, 39 transitions, 103 flow [2024-11-17 03:42:49,285 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:42:49,285 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:42:49,285 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:42:49,286 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-17 03:42:49,286 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-17 03:42:49,286 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:42:49,286 INFO L85 PathProgramCache]: Analyzing trace with hash -759340135, now seen corresponding path program 1 times [2024-11-17 03:42:49,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:42:49,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985295189] [2024-11-17 03:42:49,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:42:49,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:42:49,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:42:49,332 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 03:42:49,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:42:49,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985295189] [2024-11-17 03:42:49,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985295189] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:42:49,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:42:49,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-17 03:42:49,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744651273] [2024-11-17 03:42:49,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:42:49,334 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-17 03:42:49,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:42:49,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-17 03:42:49,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-17 03:42:49,339 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 52 [2024-11-17 03:42:49,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 39 transitions, 103 flow. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 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 03:42:49,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:42:49,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 52 [2024-11-17 03:42:49,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:42:49,402 INFO L124 PetriNetUnfolderBase]: 114/269 cut-off events. [2024-11-17 03:42:49,403 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2024-11-17 03:42:49,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 489 conditions, 269 events. 114/269 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1170 event pairs, 86 based on Foata normal form. 1/265 useless extension candidates. Maximal degree in co-relation 460. Up to 201 conditions per place. [2024-11-17 03:42:49,405 INFO L140 encePairwiseOnDemand]: 49/52 looper letters, 24 selfloop transitions, 2 changer transitions 0/38 dead transitions. [2024-11-17 03:42:49,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 38 transitions, 150 flow [2024-11-17 03:42:49,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:42:49,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:42:49,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 96 transitions. [2024-11-17 03:42:49,407 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6153846153846154 [2024-11-17 03:42:49,407 INFO L175 Difference]: Start difference. First operand has 43 places, 39 transitions, 103 flow. Second operand 3 states and 96 transitions. [2024-11-17 03:42:49,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 38 transitions, 150 flow [2024-11-17 03:42:49,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 38 transitions, 147 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:42:49,409 INFO L231 Difference]: Finished difference. Result has 44 places, 38 transitions, 103 flow [2024-11-17 03:42:49,409 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=103, PETRI_PLACES=44, PETRI_TRANSITIONS=38} [2024-11-17 03:42:49,410 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, -6 predicate places. [2024-11-17 03:42:49,410 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 38 transitions, 103 flow [2024-11-17 03:42:49,410 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 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 03:42:49,410 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:42:49,411 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:42:49,411 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-17 03:42:49,411 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-17 03:42:49,411 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:42:49,411 INFO L85 PathProgramCache]: Analyzing trace with hash 522365360, now seen corresponding path program 1 times [2024-11-17 03:42:49,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:42:49,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431224622] [2024-11-17 03:42:49,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:42:49,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:42:49,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:42:49,607 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 03:42:49,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:42:49,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431224622] [2024-11-17 03:42:49,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431224622] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:42:49,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203985793] [2024-11-17 03:42:49,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:42:49,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:42:49,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:42:49,611 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 03:42:49,612 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 03:42:49,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:42:49,673 INFO L255 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-17 03:42:49,675 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:42:49,775 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 03:42:49,776 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:42:49,845 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 29 treesize of output 25 [2024-11-17 03:42:49,871 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 03:42:49,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203985793] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:42:49,872 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:42:49,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-17 03:42:49,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005114979] [2024-11-17 03:42:49,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:42:49,873 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-17 03:42:49,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:42:49,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-17 03:42:49,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-17 03:42:50,083 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 52 [2024-11-17 03:42:50,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 38 transitions, 103 flow. Second operand has 11 states, 11 states have (on average 25.181818181818183) internal successors, (277), 11 states have internal predecessors, (277), 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 03:42:50,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:42:50,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 52 [2024-11-17 03:42:50,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:42:50,290 INFO L124 PetriNetUnfolderBase]: 226/498 cut-off events. [2024-11-17 03:42:50,290 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2024-11-17 03:42:50,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 919 conditions, 498 events. 226/498 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2563 event pairs, 86 based on Foata normal form. 0/475 useless extension candidates. Maximal degree in co-relation 901. Up to 213 conditions per place. [2024-11-17 03:42:50,294 INFO L140 encePairwiseOnDemand]: 47/52 looper letters, 39 selfloop transitions, 4 changer transitions 0/55 dead transitions. [2024-11-17 03:42:50,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 55 transitions, 226 flow [2024-11-17 03:42:50,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-17 03:42:50,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-17 03:42:50,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 159 transitions. [2024-11-17 03:42:50,297 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6115384615384616 [2024-11-17 03:42:50,298 INFO L175 Difference]: Start difference. First operand has 44 places, 38 transitions, 103 flow. Second operand 5 states and 159 transitions. [2024-11-17 03:42:50,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 55 transitions, 226 flow [2024-11-17 03:42:50,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 55 transitions, 222 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:42:50,300 INFO L231 Difference]: Finished difference. Result has 47 places, 39 transitions, 115 flow [2024-11-17 03:42:50,301 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=99, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=115, PETRI_PLACES=47, PETRI_TRANSITIONS=39} [2024-11-17 03:42:50,302 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, -3 predicate places. [2024-11-17 03:42:50,303 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 39 transitions, 115 flow [2024-11-17 03:42:50,303 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 25.181818181818183) internal successors, (277), 11 states have internal predecessors, (277), 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 03:42:50,304 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:42:50,304 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:42:50,321 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 03:42:50,508 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,SelfDestructingSolverStorable5 [2024-11-17 03:42:50,509 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-17 03:42:50,510 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:42:50,510 INFO L85 PathProgramCache]: Analyzing trace with hash -1864389249, now seen corresponding path program 1 times [2024-11-17 03:42:50,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:42:50,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617680855] [2024-11-17 03:42:50,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:42:50,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:42:50,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:42:50,752 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 03:42:50,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:42:50,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617680855] [2024-11-17 03:42:50,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617680855] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:42:50,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648114933] [2024-11-17 03:42:50,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:42:50,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:42:50,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:42:50,755 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 03:42:50,756 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 03:42:50,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:42:50,829 INFO L255 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-17 03:42:50,831 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:42:50,844 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 03:42:50,958 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 03:42:50,959 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:42:51,088 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 03:42:51,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648114933] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-17 03:42:51,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-17 03:42:51,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 3] total 10 [2024-11-17 03:42:51,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145005225] [2024-11-17 03:42:51,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:42:51,089 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-17 03:42:51,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:42:51,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-17 03:42:51,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2024-11-17 03:42:51,140 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 52 [2024-11-17 03:42:51,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 39 transitions, 115 flow. Second operand has 5 states, 5 states have (on average 21.0) internal successors, (105), 5 states have internal predecessors, (105), 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 03:42:51,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:42:51,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 52 [2024-11-17 03:42:51,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:42:51,276 INFO L124 PetriNetUnfolderBase]: 384/756 cut-off events. [2024-11-17 03:42:51,276 INFO L125 PetriNetUnfolderBase]: For 92/114 co-relation queries the response was YES. [2024-11-17 03:42:51,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1562 conditions, 756 events. 384/756 cut-off events. For 92/114 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3892 event pairs, 81 based on Foata normal form. 0/669 useless extension candidates. Maximal degree in co-relation 1533. Up to 489 conditions per place. [2024-11-17 03:42:51,281 INFO L140 encePairwiseOnDemand]: 48/52 looper letters, 40 selfloop transitions, 3 changer transitions 0/51 dead transitions. [2024-11-17 03:42:51,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 51 transitions, 232 flow [2024-11-17 03:42:51,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-17 03:42:51,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-17 03:42:51,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 116 transitions. [2024-11-17 03:42:51,284 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5576923076923077 [2024-11-17 03:42:51,284 INFO L175 Difference]: Start difference. First operand has 47 places, 39 transitions, 115 flow. Second operand 4 states and 116 transitions. [2024-11-17 03:42:51,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 51 transitions, 232 flow [2024-11-17 03:42:51,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 51 transitions, 225 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-17 03:42:51,288 INFO L231 Difference]: Finished difference. Result has 48 places, 40 transitions, 123 flow [2024-11-17 03:42:51,288 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=109, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=123, PETRI_PLACES=48, PETRI_TRANSITIONS=40} [2024-11-17 03:42:51,289 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, -2 predicate places. [2024-11-17 03:42:51,290 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 40 transitions, 123 flow [2024-11-17 03:42:51,290 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.0) internal successors, (105), 5 states have internal predecessors, (105), 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 03:42:51,290 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:42:51,290 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:42:51,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-17 03:42:51,490 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:42:51,491 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-17 03:42:51,492 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:42:51,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1961491359, now seen corresponding path program 1 times [2024-11-17 03:42:51,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:42:51,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812633430] [2024-11-17 03:42:51,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:42:51,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:42:51,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:42:51,723 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 03:42:51,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:42:51,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812633430] [2024-11-17 03:42:51,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812633430] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:42:51,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417131708] [2024-11-17 03:42:51,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:42:51,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:42:51,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:42:51,729 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 03:42:51,732 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 03:42:51,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:42:51,798 INFO L255 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-17 03:42:51,799 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:42:51,957 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 03:42:51,958 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:42:51,992 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 29 treesize of output 25 [2024-11-17 03:42:52,266 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 03:42:52,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417131708] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:42:52,266 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:42:52,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2024-11-17 03:42:52,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380510593] [2024-11-17 03:42:52,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:42:52,267 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-17 03:42:52,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:42:52,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-17 03:42:52,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2024-11-17 03:42:52,669 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 52 [2024-11-17 03:42:52,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 40 transitions, 123 flow. Second operand has 17 states, 17 states have (on average 20.11764705882353) internal successors, (342), 17 states have internal predecessors, (342), 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 03:42:52,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:42:52,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 52 [2024-11-17 03:42:52,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:42:53,175 INFO L124 PetriNetUnfolderBase]: 468/951 cut-off events. [2024-11-17 03:42:53,175 INFO L125 PetriNetUnfolderBase]: For 111/137 co-relation queries the response was YES. [2024-11-17 03:42:53,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1997 conditions, 951 events. 468/951 cut-off events. For 111/137 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 5313 event pairs, 120 based on Foata normal form. 0/940 useless extension candidates. Maximal degree in co-relation 1130. Up to 250 conditions per place. [2024-11-17 03:42:53,181 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 54 selfloop transitions, 12 changer transitions 0/73 dead transitions. [2024-11-17 03:42:53,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 73 transitions, 356 flow [2024-11-17 03:42:53,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-17 03:42:53,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-17 03:42:53,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 268 transitions. [2024-11-17 03:42:53,183 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.46853146853146854 [2024-11-17 03:42:53,183 INFO L175 Difference]: Start difference. First operand has 48 places, 40 transitions, 123 flow. Second operand 11 states and 268 transitions. [2024-11-17 03:42:53,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 73 transitions, 356 flow [2024-11-17 03:42:53,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 73 transitions, 350 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:42:53,186 INFO L231 Difference]: Finished difference. Result has 53 places, 41 transitions, 169 flow [2024-11-17 03:42:53,186 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=107, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=169, PETRI_PLACES=53, PETRI_TRANSITIONS=41} [2024-11-17 03:42:53,186 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 3 predicate places. [2024-11-17 03:42:53,187 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 41 transitions, 169 flow [2024-11-17 03:42:53,187 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 20.11764705882353) internal successors, (342), 17 states have internal predecessors, (342), 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 03:42:53,187 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:42:53,187 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:42:53,204 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 03:42:53,391 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:42:53,392 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-17 03:42:53,393 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:42:53,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1120416001, now seen corresponding path program 1 times [2024-11-17 03:42:53,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:42:53,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717012155] [2024-11-17 03:42:53,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:42:53,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:42:53,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:42:53,636 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:42:53,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:42:53,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717012155] [2024-11-17 03:42:53,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717012155] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:42:53,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981007193] [2024-11-17 03:42:53,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:42:53,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:42:53,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:42:53,640 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 03:42:53,641 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 03:42:53,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:42:53,711 INFO L255 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-17 03:42:53,712 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:42:53,886 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:42:53,886 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:42:53,962 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 36 treesize of output 32 [2024-11-17 03:42:54,203 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:42:54,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981007193] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:42:54,204 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:42:54,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 17 [2024-11-17 03:42:54,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720925951] [2024-11-17 03:42:54,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:42:54,205 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-17 03:42:54,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:42:54,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-17 03:42:54,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2024-11-17 03:42:55,013 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 52 [2024-11-17 03:42:55,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 41 transitions, 169 flow. Second operand has 19 states, 19 states have (on average 23.736842105263158) internal successors, (451), 19 states have internal predecessors, (451), 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 03:42:55,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:42:55,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 52 [2024-11-17 03:42:55,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:42:55,686 INFO L124 PetriNetUnfolderBase]: 629/1264 cut-off events. [2024-11-17 03:42:55,687 INFO L125 PetriNetUnfolderBase]: For 205/205 co-relation queries the response was YES. [2024-11-17 03:42:55,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2710 conditions, 1264 events. 629/1264 cut-off events. For 205/205 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 7242 event pairs, 208 based on Foata normal form. 0/1255 useless extension candidates. Maximal degree in co-relation 1544. Up to 349 conditions per place. [2024-11-17 03:42:55,695 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 91 selfloop transitions, 17 changer transitions 0/114 dead transitions. [2024-11-17 03:42:55,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 114 transitions, 584 flow [2024-11-17 03:42:55,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-17 03:42:55,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-17 03:42:55,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 384 transitions. [2024-11-17 03:42:55,697 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5680473372781065 [2024-11-17 03:42:55,697 INFO L175 Difference]: Start difference. First operand has 53 places, 41 transitions, 169 flow. Second operand 13 states and 384 transitions. [2024-11-17 03:42:55,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 114 transitions, 584 flow [2024-11-17 03:42:55,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 114 transitions, 579 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-11-17 03:42:55,702 INFO L231 Difference]: Finished difference. Result has 63 places, 46 transitions, 217 flow [2024-11-17 03:42:55,703 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=217, PETRI_PLACES=63, PETRI_TRANSITIONS=46} [2024-11-17 03:42:55,704 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 13 predicate places. [2024-11-17 03:42:55,705 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 46 transitions, 217 flow [2024-11-17 03:42:55,705 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 23.736842105263158) internal successors, (451), 19 states have internal predecessors, (451), 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 03:42:55,705 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:42:55,706 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] [2024-11-17 03:42:55,724 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-17 03:42:55,906 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:42:55,906 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-17 03:42:55,907 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:42:55,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1958033336, now seen corresponding path program 1 times [2024-11-17 03:42:55,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:42:55,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619332027] [2024-11-17 03:42:55,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:42:55,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:42:55,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:42:55,972 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 03:42:55,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:42:55,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619332027] [2024-11-17 03:42:55,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619332027] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:42:55,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:42:55,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-17 03:42:55,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16505653] [2024-11-17 03:42:55,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:42:55,974 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-17 03:42:55,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:42:55,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-17 03:42:55,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-17 03:42:55,985 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 52 [2024-11-17 03:42:55,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 46 transitions, 217 flow. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 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 03:42:55,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:42:55,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 52 [2024-11-17 03:42:55,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:42:56,160 INFO L124 PetriNetUnfolderBase]: 629/1264 cut-off events. [2024-11-17 03:42:56,160 INFO L125 PetriNetUnfolderBase]: For 550/550 co-relation queries the response was YES. [2024-11-17 03:42:56,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2968 conditions, 1264 events. 629/1264 cut-off events. For 550/550 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 7312 event pairs, 179 based on Foata normal form. 2/1251 useless extension candidates. Maximal degree in co-relation 1679. Up to 913 conditions per place. [2024-11-17 03:42:56,170 INFO L140 encePairwiseOnDemand]: 48/52 looper letters, 49 selfloop transitions, 4 changer transitions 1/62 dead transitions. [2024-11-17 03:42:56,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 62 transitions, 380 flow [2024-11-17 03:42:56,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:42:56,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:42:56,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 109 transitions. [2024-11-17 03:42:56,172 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6987179487179487 [2024-11-17 03:42:56,172 INFO L175 Difference]: Start difference. First operand has 63 places, 46 transitions, 217 flow. Second operand 3 states and 109 transitions. [2024-11-17 03:42:56,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 62 transitions, 380 flow [2024-11-17 03:42:56,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 62 transitions, 354 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-11-17 03:42:56,175 INFO L231 Difference]: Finished difference. Result has 59 places, 49 transitions, 229 flow [2024-11-17 03:42:56,176 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=229, PETRI_PLACES=59, PETRI_TRANSITIONS=49} [2024-11-17 03:42:56,177 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 9 predicate places. [2024-11-17 03:42:56,177 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 49 transitions, 229 flow [2024-11-17 03:42:56,177 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 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 03:42:56,177 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:42:56,177 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] [2024-11-17 03:42:56,177 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-17 03:42:56,177 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-17 03:42:56,178 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:42:56,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1812314813, now seen corresponding path program 1 times [2024-11-17 03:42:56,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:42:56,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685830359] [2024-11-17 03:42:56,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:42:56,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:42:56,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:42:56,314 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 03:42:56,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:42:56,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685830359] [2024-11-17 03:42:56,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685830359] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:42:56,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:42:56,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-17 03:42:56,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173360342] [2024-11-17 03:42:56,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:42:56,316 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-17 03:42:56,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:42:56,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-17 03:42:56,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-17 03:42:56,322 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 52 [2024-11-17 03:42:56,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 49 transitions, 229 flow. Second operand has 5 states, 5 states have (on average 25.8) internal successors, (129), 5 states have internal predecessors, (129), 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 03:42:56,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:42:56,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 52 [2024-11-17 03:42:56,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:42:56,575 INFO L124 PetriNetUnfolderBase]: 1097/2063 cut-off events. [2024-11-17 03:42:56,575 INFO L125 PetriNetUnfolderBase]: For 721/721 co-relation queries the response was YES. [2024-11-17 03:42:56,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4864 conditions, 2063 events. 1097/2063 cut-off events. For 721/721 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 12381 event pairs, 374 based on Foata normal form. 48/2107 useless extension candidates. Maximal degree in co-relation 2745. Up to 878 conditions per place. [2024-11-17 03:42:56,586 INFO L140 encePairwiseOnDemand]: 44/52 looper letters, 77 selfloop transitions, 14 changer transitions 0/97 dead transitions. [2024-11-17 03:42:56,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 97 transitions, 578 flow [2024-11-17 03:42:56,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-17 03:42:56,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-17 03:42:56,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 177 transitions. [2024-11-17 03:42:56,588 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6807692307692308 [2024-11-17 03:42:56,588 INFO L175 Difference]: Start difference. First operand has 59 places, 49 transitions, 229 flow. Second operand 5 states and 177 transitions. [2024-11-17 03:42:56,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 97 transitions, 578 flow [2024-11-17 03:42:56,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 97 transitions, 569 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-17 03:42:56,590 INFO L231 Difference]: Finished difference. Result has 65 places, 57 transitions, 329 flow [2024-11-17 03:42:56,591 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=225, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=329, PETRI_PLACES=65, PETRI_TRANSITIONS=57} [2024-11-17 03:42:56,591 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 15 predicate places. [2024-11-17 03:42:56,591 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 57 transitions, 329 flow [2024-11-17 03:42:56,592 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.8) internal successors, (129), 5 states have internal predecessors, (129), 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 03:42:56,592 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:42:56,592 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] [2024-11-17 03:42:56,592 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-17 03:42:56,592 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-17 03:42:56,593 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:42:56,593 INFO L85 PathProgramCache]: Analyzing trace with hash -373369267, now seen corresponding path program 2 times [2024-11-17 03:42:56,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:42:56,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790865040] [2024-11-17 03:42:56,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:42:56,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:42:56,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:42:56,704 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 03:42:56,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:42:56,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790865040] [2024-11-17 03:42:56,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790865040] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:42:56,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364250778] [2024-11-17 03:42:56,705 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-17 03:42:56,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:42:56,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:42:56,708 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 03:42:56,710 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 03:42:56,785 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-17 03:42:56,786 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:42:56,789 INFO L255 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-17 03:42:56,790 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:42:56,819 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 03:42:56,819 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:42:56,857 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 03:42:56,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364250778] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-17 03:42:56,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-17 03:42:56,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 5] total 7 [2024-11-17 03:42:56,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552602349] [2024-11-17 03:42:56,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:42:56,859 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 03:42:56,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:42:56,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 03:42:56,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-11-17 03:42:56,863 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 52 [2024-11-17 03:42:56,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 57 transitions, 329 flow. Second operand has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 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 03:42:56,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:42:56,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 52 [2024-11-17 03:42:56,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:42:57,142 INFO L124 PetriNetUnfolderBase]: 987/1897 cut-off events. [2024-11-17 03:42:57,143 INFO L125 PetriNetUnfolderBase]: For 1941/1981 co-relation queries the response was YES. [2024-11-17 03:42:57,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5164 conditions, 1897 events. 987/1897 cut-off events. For 1941/1981 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 11327 event pairs, 208 based on Foata normal form. 16/1899 useless extension candidates. Maximal degree in co-relation 2919. Up to 1287 conditions per place. [2024-11-17 03:42:57,157 INFO L140 encePairwiseOnDemand]: 47/52 looper letters, 64 selfloop transitions, 15 changer transitions 1/87 dead transitions. [2024-11-17 03:42:57,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 87 transitions, 641 flow [2024-11-17 03:42:57,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-17 03:42:57,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-17 03:42:57,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 136 transitions. [2024-11-17 03:42:57,158 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6538461538461539 [2024-11-17 03:42:57,158 INFO L175 Difference]: Start difference. First operand has 65 places, 57 transitions, 329 flow. Second operand 4 states and 136 transitions. [2024-11-17 03:42:57,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 87 transitions, 641 flow [2024-11-17 03:42:57,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 87 transitions, 616 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:42:57,163 INFO L231 Difference]: Finished difference. Result has 69 places, 63 transitions, 421 flow [2024-11-17 03:42:57,163 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=314, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=421, PETRI_PLACES=69, PETRI_TRANSITIONS=63} [2024-11-17 03:42:57,163 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 19 predicate places. [2024-11-17 03:42:57,163 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 63 transitions, 421 flow [2024-11-17 03:42:57,164 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 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 03:42:57,164 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:42:57,164 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] [2024-11-17 03:42:57,181 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 03:42:57,364 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:42:57,365 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-17 03:42:57,365 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:42:57,365 INFO L85 PathProgramCache]: Analyzing trace with hash -715901241, now seen corresponding path program 3 times [2024-11-17 03:42:57,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:42:57,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489466686] [2024-11-17 03:42:57,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:42:57,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:42:57,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:42:57,442 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 03:42:57,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:42:57,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489466686] [2024-11-17 03:42:57,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489466686] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:42:57,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:42:57,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-17 03:42:57,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342409807] [2024-11-17 03:42:57,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:42:57,444 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-17 03:42:57,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:42:57,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-17 03:42:57,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-17 03:42:57,448 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 52 [2024-11-17 03:42:57,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 63 transitions, 421 flow. Second operand has 5 states, 5 states have (on average 25.8) internal successors, (129), 5 states have internal predecessors, (129), 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 03:42:57,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:42:57,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 52 [2024-11-17 03:42:57,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:42:57,776 INFO L124 PetriNetUnfolderBase]: 1065/2006 cut-off events. [2024-11-17 03:42:57,777 INFO L125 PetriNetUnfolderBase]: For 3920/3936 co-relation queries the response was YES. [2024-11-17 03:42:57,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6078 conditions, 2006 events. 1065/2006 cut-off events. For 3920/3936 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 12045 event pairs, 355 based on Foata normal form. 54/2056 useless extension candidates. Maximal degree in co-relation 3304. Up to 938 conditions per place. [2024-11-17 03:42:57,790 INFO L140 encePairwiseOnDemand]: 44/52 looper letters, 90 selfloop transitions, 17 changer transitions 9/122 dead transitions. [2024-11-17 03:42:57,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 122 transitions, 978 flow [2024-11-17 03:42:57,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-17 03:42:57,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-17 03:42:57,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 205 transitions. [2024-11-17 03:42:57,791 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.657051282051282 [2024-11-17 03:42:57,791 INFO L175 Difference]: Start difference. First operand has 69 places, 63 transitions, 421 flow. Second operand 6 states and 205 transitions. [2024-11-17 03:42:57,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 122 transitions, 978 flow [2024-11-17 03:42:57,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 122 transitions, 962 flow, removed 8 selfloop flow, removed 0 redundant places. [2024-11-17 03:42:57,799 INFO L231 Difference]: Finished difference. Result has 78 places, 71 transitions, 558 flow [2024-11-17 03:42:57,799 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=417, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=558, PETRI_PLACES=78, PETRI_TRANSITIONS=71} [2024-11-17 03:42:57,800 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 28 predicate places. [2024-11-17 03:42:57,800 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 71 transitions, 558 flow [2024-11-17 03:42:57,800 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.8) internal successors, (129), 5 states have internal predecessors, (129), 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 03:42:57,800 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:42:57,800 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] [2024-11-17 03:42:57,800 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-17 03:42:57,801 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-17 03:42:57,801 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:42:57,801 INFO L85 PathProgramCache]: Analyzing trace with hash -118562501, now seen corresponding path program 4 times [2024-11-17 03:42:57,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:42:57,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124655773] [2024-11-17 03:42:57,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:42:57,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:42:57,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:42:57,892 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 03:42:57,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:42:57,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124655773] [2024-11-17 03:42:57,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124655773] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:42:57,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:42:57,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-17 03:42:57,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192417540] [2024-11-17 03:42:57,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:42:57,894 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-17 03:42:57,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:42:57,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-17 03:42:57,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-17 03:42:57,903 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 52 [2024-11-17 03:42:57,904 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 71 transitions, 558 flow. Second operand has 5 states, 5 states have (on average 26.6) internal successors, (133), 5 states have internal predecessors, (133), 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 03:42:57,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:42:57,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 52 [2024-11-17 03:42:57,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:42:58,184 INFO L124 PetriNetUnfolderBase]: 877/1760 cut-off events. [2024-11-17 03:42:58,185 INFO L125 PetriNetUnfolderBase]: For 4499/4569 co-relation queries the response was YES. [2024-11-17 03:42:58,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5762 conditions, 1760 events. 877/1760 cut-off events. For 4499/4569 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 10666 event pairs, 425 based on Foata normal form. 34/1768 useless extension candidates. Maximal degree in co-relation 3123. Up to 1084 conditions per place. [2024-11-17 03:42:58,200 INFO L140 encePairwiseOnDemand]: 47/52 looper letters, 80 selfloop transitions, 10 changer transitions 6/104 dead transitions. [2024-11-17 03:42:58,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 104 transitions, 935 flow [2024-11-17 03:42:58,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-17 03:42:58,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-17 03:42:58,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 163 transitions. [2024-11-17 03:42:58,202 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6269230769230769 [2024-11-17 03:42:58,202 INFO L175 Difference]: Start difference. First operand has 78 places, 71 transitions, 558 flow. Second operand 5 states and 163 transitions. [2024-11-17 03:42:58,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 104 transitions, 935 flow [2024-11-17 03:42:58,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 104 transitions, 916 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-17 03:42:58,212 INFO L231 Difference]: Finished difference. Result has 84 places, 72 transitions, 599 flow [2024-11-17 03:42:58,213 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=545, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=599, PETRI_PLACES=84, PETRI_TRANSITIONS=72} [2024-11-17 03:42:58,214 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 34 predicate places. [2024-11-17 03:42:58,214 INFO L471 AbstractCegarLoop]: Abstraction has has 84 places, 72 transitions, 599 flow [2024-11-17 03:42:58,214 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.6) internal successors, (133), 5 states have internal predecessors, (133), 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 03:42:58,214 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:42:58,214 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] [2024-11-17 03:42:58,214 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-17 03:42:58,215 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-17 03:42:58,215 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:42:58,215 INFO L85 PathProgramCache]: Analyzing trace with hash -296451921, now seen corresponding path program 5 times [2024-11-17 03:42:58,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:42:58,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881655835] [2024-11-17 03:42:58,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:42:58,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:42:58,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:42:58,365 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 03:42:58,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:42:58,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881655835] [2024-11-17 03:42:58,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881655835] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:42:58,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723641604] [2024-11-17 03:42:58,366 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-17 03:42:58,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:42:58,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:42:58,369 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 03:42:58,370 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 03:42:58,445 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-17 03:42:58,446 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:42:58,447 INFO L255 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-17 03:42:58,448 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:42:58,495 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 03:42:58,495 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:42:58,548 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 03:42:58,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723641604] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:42:58,549 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:42:58,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4] total 8 [2024-11-17 03:42:58,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406903539] [2024-11-17 03:42:58,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:42:58,550 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-17 03:42:58,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:42:58,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-17 03:42:58,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-11-17 03:42:58,559 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 52 [2024-11-17 03:42:58,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 72 transitions, 599 flow. Second operand has 8 states, 8 states have (on average 26.0) internal successors, (208), 8 states have internal predecessors, (208), 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 03:42:58,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:42:58,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 52 [2024-11-17 03:42:58,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:42:59,018 INFO L124 PetriNetUnfolderBase]: 1123/2140 cut-off events. [2024-11-17 03:42:59,018 INFO L125 PetriNetUnfolderBase]: For 6560/6568 co-relation queries the response was YES. [2024-11-17 03:42:59,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7588 conditions, 2140 events. 1123/2140 cut-off events. For 6560/6568 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 12894 event pairs, 297 based on Foata normal form. 38/2174 useless extension candidates. Maximal degree in co-relation 6688. Up to 794 conditions per place. [2024-11-17 03:42:59,040 INFO L140 encePairwiseOnDemand]: 44/52 looper letters, 94 selfloop transitions, 58 changer transitions 8/166 dead transitions. [2024-11-17 03:42:59,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 166 transitions, 1512 flow [2024-11-17 03:42:59,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-17 03:42:59,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-17 03:42:59,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 320 transitions. [2024-11-17 03:42:59,042 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6153846153846154 [2024-11-17 03:42:59,042 INFO L175 Difference]: Start difference. First operand has 84 places, 72 transitions, 599 flow. Second operand 10 states and 320 transitions. [2024-11-17 03:42:59,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 166 transitions, 1512 flow [2024-11-17 03:42:59,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 166 transitions, 1484 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-11-17 03:42:59,054 INFO L231 Difference]: Finished difference. Result has 97 places, 106 transitions, 1148 flow [2024-11-17 03:42:59,055 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=561, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1148, PETRI_PLACES=97, PETRI_TRANSITIONS=106} [2024-11-17 03:42:59,055 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 47 predicate places. [2024-11-17 03:42:59,056 INFO L471 AbstractCegarLoop]: Abstraction has has 97 places, 106 transitions, 1148 flow [2024-11-17 03:42:59,056 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 26.0) internal successors, (208), 8 states have internal predecessors, (208), 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 03:42:59,057 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:42:59,057 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] [2024-11-17 03:42:59,075 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-17 03:42:59,260 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:42:59,261 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-17 03:42:59,261 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:42:59,261 INFO L85 PathProgramCache]: Analyzing trace with hash 128379025, now seen corresponding path program 6 times [2024-11-17 03:42:59,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:42:59,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107676085] [2024-11-17 03:42:59,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:42:59,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:42:59,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:42:59,364 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 03:42:59,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:42:59,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107676085] [2024-11-17 03:42:59,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107676085] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:42:59,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:42:59,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-17 03:42:59,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408304689] [2024-11-17 03:42:59,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:42:59,365 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-17 03:42:59,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:42:59,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-17 03:42:59,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-17 03:42:59,370 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 52 [2024-11-17 03:42:59,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 106 transitions, 1148 flow. Second operand has 5 states, 5 states have (on average 25.8) internal successors, (129), 5 states have internal predecessors, (129), 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 03:42:59,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:42:59,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 52 [2024-11-17 03:42:59,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:42:59,686 INFO L124 PetriNetUnfolderBase]: 1089/2074 cut-off events. [2024-11-17 03:42:59,687 INFO L125 PetriNetUnfolderBase]: For 10390/10390 co-relation queries the response was YES. [2024-11-17 03:42:59,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8582 conditions, 2074 events. 1089/2074 cut-off events. For 10390/10390 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 12258 event pairs, 583 based on Foata normal form. 4/2074 useless extension candidates. Maximal degree in co-relation 7603. Up to 1298 conditions per place. [2024-11-17 03:42:59,710 INFO L140 encePairwiseOnDemand]: 45/52 looper letters, 102 selfloop transitions, 24 changer transitions 6/138 dead transitions. [2024-11-17 03:42:59,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 138 transitions, 1663 flow [2024-11-17 03:42:59,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-17 03:42:59,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-17 03:42:59,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 164 transitions. [2024-11-17 03:42:59,711 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6307692307692307 [2024-11-17 03:42:59,711 INFO L175 Difference]: Start difference. First operand has 97 places, 106 transitions, 1148 flow. Second operand 5 states and 164 transitions. [2024-11-17 03:42:59,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 138 transitions, 1663 flow [2024-11-17 03:42:59,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 138 transitions, 1579 flow, removed 37 selfloop flow, removed 2 redundant places. [2024-11-17 03:42:59,735 INFO L231 Difference]: Finished difference. Result has 100 places, 113 transitions, 1248 flow [2024-11-17 03:42:59,735 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1076, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1248, PETRI_PLACES=100, PETRI_TRANSITIONS=113} [2024-11-17 03:42:59,735 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 50 predicate places. [2024-11-17 03:42:59,736 INFO L471 AbstractCegarLoop]: Abstraction has has 100 places, 113 transitions, 1248 flow [2024-11-17 03:42:59,736 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.8) internal successors, (129), 5 states have internal predecessors, (129), 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 03:42:59,736 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:42:59,736 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] [2024-11-17 03:42:59,736 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-17 03:42:59,736 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-17 03:42:59,736 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:42:59,737 INFO L85 PathProgramCache]: Analyzing trace with hash 1868513015, now seen corresponding path program 7 times [2024-11-17 03:42:59,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:42:59,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510922603] [2024-11-17 03:42:59,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:42:59,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:42:59,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:42:59,847 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 03:42:59,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:42:59,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510922603] [2024-11-17 03:42:59,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510922603] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:42:59,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741884657] [2024-11-17 03:42:59,848 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-17 03:42:59,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:42:59,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:42:59,850 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 03:42:59,852 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 03:42:59,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:42:59,921 INFO L255 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-17 03:42:59,924 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:42:59,952 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 03:42:59,953 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:43:00,002 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 03:43:00,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741884657] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:43:00,003 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:43:00,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2024-11-17 03:43:00,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702964377] [2024-11-17 03:43:00,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:43:00,004 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-17 03:43:00,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:43:00,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-17 03:43:00,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-11-17 03:43:00,012 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 52 [2024-11-17 03:43:00,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 113 transitions, 1248 flow. Second operand has 9 states, 9 states have (on average 25.0) internal successors, (225), 9 states have internal predecessors, (225), 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 03:43:00,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:43:00,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 52 [2024-11-17 03:43:00,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:43:00,374 INFO L124 PetriNetUnfolderBase]: 1065/2022 cut-off events. [2024-11-17 03:43:00,374 INFO L125 PetriNetUnfolderBase]: For 10852/10868 co-relation queries the response was YES. [2024-11-17 03:43:00,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8481 conditions, 2022 events. 1065/2022 cut-off events. For 10852/10868 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 11758 event pairs, 533 based on Foata normal form. 26/2044 useless extension candidates. Maximal degree in co-relation 7572. Up to 1204 conditions per place. [2024-11-17 03:43:00,393 INFO L140 encePairwiseOnDemand]: 44/52 looper letters, 98 selfloop transitions, 45 changer transitions 8/157 dead transitions. [2024-11-17 03:43:00,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 157 transitions, 1824 flow [2024-11-17 03:43:00,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-17 03:43:00,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-17 03:43:00,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 246 transitions. [2024-11-17 03:43:00,395 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5913461538461539 [2024-11-17 03:43:00,395 INFO L175 Difference]: Start difference. First operand has 100 places, 113 transitions, 1248 flow. Second operand 8 states and 246 transitions. [2024-11-17 03:43:00,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 157 transitions, 1824 flow [2024-11-17 03:43:00,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 157 transitions, 1798 flow, removed 7 selfloop flow, removed 1 redundant places. [2024-11-17 03:43:00,420 INFO L231 Difference]: Finished difference. Result has 109 places, 119 transitions, 1435 flow [2024-11-17 03:43:00,420 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1228, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1435, PETRI_PLACES=109, PETRI_TRANSITIONS=119} [2024-11-17 03:43:00,420 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 59 predicate places. [2024-11-17 03:43:00,421 INFO L471 AbstractCegarLoop]: Abstraction has has 109 places, 119 transitions, 1435 flow [2024-11-17 03:43:00,421 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 25.0) internal successors, (225), 9 states have internal predecessors, (225), 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 03:43:00,421 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:43:00,421 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, 1] [2024-11-17 03:43:00,438 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 03:43:00,622 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,SelfDestructingSolverStorable16 [2024-11-17 03:43:00,623 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-17 03:43:00,623 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:43:00,623 INFO L85 PathProgramCache]: Analyzing trace with hash -110214580, now seen corresponding path program 1 times [2024-11-17 03:43:00,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:43:00,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212246024] [2024-11-17 03:43:00,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:43:00,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:43:00,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:43:00,719 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 03:43:00,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:43:00,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212246024] [2024-11-17 03:43:00,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212246024] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:43:00,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:43:00,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-17 03:43:00,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230017666] [2024-11-17 03:43:00,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:43:00,720 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 03:43:00,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:43:00,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 03:43:00,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-17 03:43:00,725 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 52 [2024-11-17 03:43:00,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 119 transitions, 1435 flow. Second operand has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 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 03:43:00,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:43:00,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 52 [2024-11-17 03:43:00,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:43:01,010 INFO L124 PetriNetUnfolderBase]: 969/1842 cut-off events. [2024-11-17 03:43:01,010 INFO L125 PetriNetUnfolderBase]: For 13057/13063 co-relation queries the response was YES. [2024-11-17 03:43:01,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8664 conditions, 1842 events. 969/1842 cut-off events. For 13057/13063 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 10515 event pairs, 209 based on Foata normal form. 32/1867 useless extension candidates. Maximal degree in co-relation 8037. Up to 1302 conditions per place. [2024-11-17 03:43:01,027 INFO L140 encePairwiseOnDemand]: 47/52 looper letters, 112 selfloop transitions, 21 changer transitions 3/143 dead transitions. [2024-11-17 03:43:01,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 143 transitions, 1913 flow [2024-11-17 03:43:01,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-17 03:43:01,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-17 03:43:01,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 137 transitions. [2024-11-17 03:43:01,029 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6586538461538461 [2024-11-17 03:43:01,029 INFO L175 Difference]: Start difference. First operand has 109 places, 119 transitions, 1435 flow. Second operand 4 states and 137 transitions. [2024-11-17 03:43:01,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 143 transitions, 1913 flow [2024-11-17 03:43:01,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 143 transitions, 1826 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-11-17 03:43:01,056 INFO L231 Difference]: Finished difference. Result has 108 places, 125 transitions, 1536 flow [2024-11-17 03:43:01,057 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1358, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1536, PETRI_PLACES=108, PETRI_TRANSITIONS=125} [2024-11-17 03:43:01,057 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 58 predicate places. [2024-11-17 03:43:01,057 INFO L471 AbstractCegarLoop]: Abstraction has has 108 places, 125 transitions, 1536 flow [2024-11-17 03:43:01,057 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 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 03:43:01,057 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:43:01,057 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] [2024-11-17 03:43:01,058 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-17 03:43:01,058 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-17 03:43:01,058 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:43:01,058 INFO L85 PathProgramCache]: Analyzing trace with hash -1290782809, now seen corresponding path program 1 times [2024-11-17 03:43:01,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:43:01,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833988688] [2024-11-17 03:43:01,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:43:01,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:43:01,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:43:01,267 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 03:43:01,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:43:01,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833988688] [2024-11-17 03:43:01,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833988688] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:43:01,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186141971] [2024-11-17 03:43:01,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:43:01,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:43:01,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:43:01,270 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 03:43:01,271 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 03:43:01,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:43:01,353 INFO L255 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-17 03:43:01,354 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:43:01,587 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-17 03:43:01,608 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:43:01,608 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:43:01,784 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-17 03:43:01,784 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 19 treesize of output 7 [2024-11-17 03:43:02,020 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:43:02,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186141971] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:43:02,021 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:43:02,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 7] total 18 [2024-11-17 03:43:02,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035255429] [2024-11-17 03:43:02,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:43:02,022 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-17 03:43:02,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:43:02,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-17 03:43:02,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2024-11-17 03:43:02,621 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 52 [2024-11-17 03:43:02,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 125 transitions, 1536 flow. Second operand has 18 states, 18 states have (on average 25.944444444444443) internal successors, (467), 18 states have internal predecessors, (467), 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 03:43:02,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:43:02,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 52 [2024-11-17 03:43:02,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:43:04,379 INFO L124 PetriNetUnfolderBase]: 1361/2568 cut-off events. [2024-11-17 03:43:04,379 INFO L125 PetriNetUnfolderBase]: For 16775/16781 co-relation queries the response was YES. [2024-11-17 03:43:04,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11493 conditions, 2568 events. 1361/2568 cut-off events. For 16775/16781 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 14848 event pairs, 185 based on Foata normal form. 78/2640 useless extension candidates. Maximal degree in co-relation 11129. Up to 566 conditions per place. [2024-11-17 03:43:04,400 INFO L140 encePairwiseOnDemand]: 36/52 looper letters, 110 selfloop transitions, 58 changer transitions 138/311 dead transitions. [2024-11-17 03:43:04,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 311 transitions, 3542 flow [2024-11-17 03:43:04,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-17 03:43:04,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-11-17 03:43:04,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 757 transitions. [2024-11-17 03:43:04,403 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5823076923076923 [2024-11-17 03:43:04,403 INFO L175 Difference]: Start difference. First operand has 108 places, 125 transitions, 1536 flow. Second operand 25 states and 757 transitions. [2024-11-17 03:43:04,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 311 transitions, 3542 flow [2024-11-17 03:43:04,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 311 transitions, 3464 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-11-17 03:43:04,440 INFO L231 Difference]: Finished difference. Result has 135 places, 110 transitions, 1400 flow [2024-11-17 03:43:04,440 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1476, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=1400, PETRI_PLACES=135, PETRI_TRANSITIONS=110} [2024-11-17 03:43:04,441 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 85 predicate places. [2024-11-17 03:43:04,441 INFO L471 AbstractCegarLoop]: Abstraction has has 135 places, 110 transitions, 1400 flow [2024-11-17 03:43:04,441 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 25.944444444444443) internal successors, (467), 18 states have internal predecessors, (467), 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 03:43:04,441 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:43:04,441 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:43:04,459 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 03:43:04,642 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 03:43:04,642 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-17 03:43:04,642 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:43:04,643 INFO L85 PathProgramCache]: Analyzing trace with hash 2121825049, now seen corresponding path program 2 times [2024-11-17 03:43:04,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:43:04,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111657751] [2024-11-17 03:43:04,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:43:04,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:43:04,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:43:04,924 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-17 03:43:04,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:43:04,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111657751] [2024-11-17 03:43:04,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111657751] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:43:04,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829898873] [2024-11-17 03:43:04,925 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-17 03:43:04,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:43:04,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:43:04,937 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 03:43:04,938 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 03:43:05,073 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-17 03:43:05,074 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:43:05,075 INFO L255 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-17 03:43:05,077 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:43:05,238 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-17 03:43:05,239 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:43:05,502 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-17 03:43:05,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829898873] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:43:05,502 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:43:05,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 16 [2024-11-17 03:43:05,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649042652] [2024-11-17 03:43:05,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:43:05,503 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-17 03:43:05,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:43:05,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-17 03:43:05,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2024-11-17 03:43:05,546 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 52 [2024-11-17 03:43:05,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 110 transitions, 1400 flow. Second operand has 16 states, 16 states have (on average 25.625) internal successors, (410), 16 states have internal predecessors, (410), 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 03:43:05,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:43:05,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 52 [2024-11-17 03:43:05,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:43:10,232 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-17 03:43:18,619 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-17 03:43:26,881 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-17 03:43:30,901 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-17 03:43:34,905 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-17 03:43:38,930 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-17 03:43:42,980 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-17 03:43:47,020 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-17 03:43:51,039 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-17 03:43:55,052 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-17 03:43:56,148 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-17 03:44:00,157 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-17 03:44:00,533 INFO L124 PetriNetUnfolderBase]: 1128/2174 cut-off events. [2024-11-17 03:44:00,533 INFO L125 PetriNetUnfolderBase]: For 22786/22803 co-relation queries the response was YES. [2024-11-17 03:44:00,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11180 conditions, 2174 events. 1128/2174 cut-off events. For 22786/22803 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 11378 event pairs, 121 based on Foata normal form. 128/2295 useless extension candidates. Maximal degree in co-relation 11140. Up to 479 conditions per place. [2024-11-17 03:44:00,553 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 246 selfloop transitions, 62 changer transitions 0/314 dead transitions. [2024-11-17 03:44:00,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 314 transitions, 4018 flow [2024-11-17 03:44:00,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-17 03:44:00,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-17 03:44:00,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 415 transitions. [2024-11-17 03:44:00,555 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6650641025641025 [2024-11-17 03:44:00,555 INFO L175 Difference]: Start difference. First operand has 135 places, 110 transitions, 1400 flow. Second operand 12 states and 415 transitions. [2024-11-17 03:44:00,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 314 transitions, 4018 flow [2024-11-17 03:44:00,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 314 transitions, 3684 flow, removed 42 selfloop flow, removed 13 redundant places. [2024-11-17 03:44:00,590 INFO L231 Difference]: Finished difference. Result has 119 places, 134 transitions, 1627 flow [2024-11-17 03:44:00,591 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1251, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1627, PETRI_PLACES=119, PETRI_TRANSITIONS=134} [2024-11-17 03:44:00,591 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 69 predicate places. [2024-11-17 03:44:00,591 INFO L471 AbstractCegarLoop]: Abstraction has has 119 places, 134 transitions, 1627 flow [2024-11-17 03:44:00,591 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 25.625) internal successors, (410), 16 states have internal predecessors, (410), 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 03:44:00,592 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:44:00,592 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 3, 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] [2024-11-17 03:44:00,609 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-17 03:44:00,795 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 03:44:00,795 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-17 03:44:00,796 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:44:00,796 INFO L85 PathProgramCache]: Analyzing trace with hash 629571560, now seen corresponding path program 3 times [2024-11-17 03:44:00,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:44:00,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376107778] [2024-11-17 03:44:00,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:44:00,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:44:00,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:44:04,237 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:44:04,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:44:04,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376107778] [2024-11-17 03:44:04,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376107778] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:44:04,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452652884] [2024-11-17 03:44:04,237 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-17 03:44:04,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:44:04,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:44:04,238 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 03:44:04,239 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 03:44:04,686 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-17 03:44:04,687 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:44:04,688 INFO L255 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-11-17 03:44:04,692 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:44:04,797 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-17 03:44:05,312 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-17 03:44:05,312 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 107 [2024-11-17 03:44:05,404 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:44:05,404 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:44:05,910 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 133 [2024-11-17 03:44:09,059 INFO L349 Elim1Store]: treesize reduction 5, result has 99.4 percent of original size [2024-11-17 03:44:09,060 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 25 new quantified variables, introduced 91 case distinctions, treesize of input 11321 treesize of output 7452