./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/unroll-3.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 8be7027f 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-3.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 a4cca88acec68e5dbb90cd5700ef248bb5273dc097847f9475a683bfbdc7b189 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dk.perfect-tracechecks-8be7027-m [2024-11-12 16:33:08,587 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-12 16:33:08,654 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-12 16:33:08,658 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-12 16:33:08,659 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-12 16:33:08,693 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-12 16:33:08,694 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-12 16:33:08,694 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-12 16:33:08,695 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-12 16:33:08,695 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-12 16:33:08,697 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-12 16:33:08,698 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-12 16:33:08,699 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-12 16:33:08,699 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-12 16:33:08,700 INFO L153 SettingsManager]: * Use SBE=true [2024-11-12 16:33:08,701 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-12 16:33:08,702 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-12 16:33:08,702 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-12 16:33:08,703 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-12 16:33:08,703 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-12 16:33:08,703 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-12 16:33:08,704 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-12 16:33:08,704 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-12 16:33:08,706 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-12 16:33:08,706 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-12 16:33:08,707 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-12 16:33:08,707 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-12 16:33:08,707 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-12 16:33:08,708 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-12 16:33:08,708 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-12 16:33:08,708 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-12 16:33:08,708 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-12 16:33:08,709 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-12 16:33:08,709 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-12 16:33:08,709 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-12 16:33:08,709 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-12 16:33:08,709 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-12 16:33:08,709 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-12 16:33:08,709 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-12 16:33:08,710 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-12 16:33:08,710 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-12 16:33:08,710 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-12 16:33:08,710 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a4cca88acec68e5dbb90cd5700ef248bb5273dc097847f9475a683bfbdc7b189 [2024-11-12 16:33:08,923 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-12 16:33:08,948 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-12 16:33:08,954 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-12 16:33:08,955 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-12 16:33:08,956 INFO L274 PluginConnector]: CDTParser initialized [2024-11-12 16:33:08,957 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/unroll-3.wvr.c [2024-11-12 16:33:10,438 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-12 16:33:10,628 INFO L384 CDTParser]: Found 1 translation units. [2024-11-12 16:33:10,628 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/unroll-3.wvr.c [2024-11-12 16:33:10,636 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eb06c3107/e8f48392fcd9420cb5b7954271612ae1/FLAGde8ffeac6 [2024-11-12 16:33:11,014 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eb06c3107/e8f48392fcd9420cb5b7954271612ae1 [2024-11-12 16:33:11,018 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-12 16:33:11,020 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-12 16:33:11,021 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-12 16:33:11,022 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-12 16:33:11,028 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-12 16:33:11,028 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 04:33:11" (1/1) ... [2024-11-12 16:33:11,029 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36d9cd88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:33:11, skipping insertion in model container [2024-11-12 16:33:11,029 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 04:33:11" (1/1) ... [2024-11-12 16:33:11,064 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-12 16:33:11,255 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-12 16:33:11,257 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-12 16:33:11,265 INFO L200 MainTranslator]: Completed pre-run [2024-11-12 16:33:11,284 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-12 16:33:11,302 INFO L204 MainTranslator]: Completed translation [2024-11-12 16:33:11,302 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:33:11 WrapperNode [2024-11-12 16:33:11,302 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-12 16:33:11,303 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-12 16:33:11,303 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-12 16:33:11,303 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-12 16:33:11,310 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:33:11" (1/1) ... [2024-11-12 16:33:11,319 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:33:11" (1/1) ... [2024-11-12 16:33:11,346 INFO L138 Inliner]: procedures = 23, calls = 25, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 139 [2024-11-12 16:33:11,347 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-12 16:33:11,347 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-12 16:33:11,348 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-12 16:33:11,348 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-12 16:33:11,358 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:33:11" (1/1) ... [2024-11-12 16:33:11,358 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:33:11" (1/1) ... [2024-11-12 16:33:11,361 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:33:11" (1/1) ... [2024-11-12 16:33:11,373 INFO L175 MemorySlicer]: Split 7 memory accesses to 2 slices as follows [2, 5]. 71 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]. [2024-11-12 16:33:11,374 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:33:11" (1/1) ... [2024-11-12 16:33:11,374 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:33:11" (1/1) ... [2024-11-12 16:33:11,380 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:33:11" (1/1) ... [2024-11-12 16:33:11,388 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:33:11" (1/1) ... [2024-11-12 16:33:11,390 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:33:11" (1/1) ... [2024-11-12 16:33:11,391 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:33:11" (1/1) ... [2024-11-12 16:33:11,396 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-12 16:33:11,397 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-12 16:33:11,397 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-12 16:33:11,397 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-12 16:33:11,398 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:33:11" (1/1) ... [2024-11-12 16:33:11,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-12 16:33:11,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:33:11,436 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) [2024-11-12 16:33:11,453 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 [2024-11-12 16:33:11,510 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-12 16:33:11,511 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-12 16:33:11,511 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-12 16:33:11,511 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-12 16:33:11,511 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-12 16:33:11,511 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-12 16:33:11,511 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-12 16:33:11,512 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-12 16:33:11,512 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-12 16:33:11,513 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-12 16:33:11,513 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-12 16:33:11,514 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-12 16:33:11,514 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-12 16:33:11,514 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-12 16:33:11,516 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-12 16:33:11,635 INFO L238 CfgBuilder]: Building ICFG [2024-11-12 16:33:11,637 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-12 16:33:11,978 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-12 16:33:11,978 INFO L287 CfgBuilder]: Performing block encoding [2024-11-12 16:33:12,224 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-12 16:33:12,225 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-12 16:33:12,225 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 04:33:12 BoogieIcfgContainer [2024-11-12 16:33:12,225 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-12 16:33:12,227 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-12 16:33:12,227 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-12 16:33:12,230 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-12 16:33:12,231 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 04:33:11" (1/3) ... [2024-11-12 16:33:12,231 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@599ba0a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 04:33:12, skipping insertion in model container [2024-11-12 16:33:12,231 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:33:11" (2/3) ... [2024-11-12 16:33:12,232 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@599ba0a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 04:33:12, skipping insertion in model container [2024-11-12 16:33:12,232 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 04:33:12" (3/3) ... [2024-11-12 16:33:12,233 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-3.wvr.c [2024-11-12 16:33:12,248 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-12 16:33:12,248 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 12 error locations. [2024-11-12 16:33:12,248 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-12 16:33:12,310 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-12 16:33:12,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 41 places, 37 transitions, 88 flow [2024-11-12 16:33:12,375 INFO L124 PetriNetUnfolderBase]: 3/35 cut-off events. [2024-11-12 16:33:12,375 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-12 16:33:12,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44 conditions, 35 events. 3/35 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 56 event pairs, 0 based on Foata normal form. 0/20 useless extension candidates. Maximal degree in co-relation 23. Up to 2 conditions per place. [2024-11-12 16:33:12,378 INFO L82 GeneralOperation]: Start removeDead. Operand has 41 places, 37 transitions, 88 flow [2024-11-12 16:33:12,383 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 38 places, 34 transitions, 80 flow [2024-11-12 16:33:12,390 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-12 16:33:12,398 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;@1a578d79, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-12 16:33:12,398 INFO L334 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2024-11-12 16:33:12,401 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-12 16:33:12,401 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-12 16:33:12,402 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-12 16:33:12,402 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:33:12,405 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-12 16:33:12,405 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-12 16:33:12,410 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:33:12,411 INFO L85 PathProgramCache]: Analyzing trace with hash 478632, now seen corresponding path program 1 times [2024-11-12 16:33:12,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:33:12,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627098635] [2024-11-12 16:33:12,420 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:33:12,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:33:12,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:33:12,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:33:12,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:33:12,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627098635] [2024-11-12 16:33:12,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627098635] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:33:12,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:33:12,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-12 16:33:12,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81697364] [2024-11-12 16:33:12,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:33:12,730 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-12 16:33:12,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:33:12,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 16:33:12,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 16:33:12,787 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 37 [2024-11-12 16:33:12,791 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 34 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 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) [2024-11-12 16:33:12,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:33:12,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 37 [2024-11-12 16:33:12,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:33:12,904 INFO L124 PetriNetUnfolderBase]: 88/211 cut-off events. [2024-11-12 16:33:12,907 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2024-11-12 16:33:12,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 387 conditions, 211 events. 88/211 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 878 event pairs, 64 based on Foata normal form. 1/161 useless extension candidates. Maximal degree in co-relation 332. Up to 153 conditions per place. [2024-11-12 16:33:12,914 INFO L140 encePairwiseOnDemand]: 33/37 looper letters, 19 selfloop transitions, 2 changer transitions 0/31 dead transitions. [2024-11-12 16:33:12,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 31 transitions, 116 flow [2024-11-12 16:33:12,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 16:33:12,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-12 16:33:12,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 62 transitions. [2024-11-12 16:33:12,927 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5585585585585585 [2024-11-12 16:33:12,929 INFO L175 Difference]: Start difference. First operand has 38 places, 34 transitions, 80 flow. Second operand 3 states and 62 transitions. [2024-11-12 16:33:12,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 31 transitions, 116 flow [2024-11-12 16:33:12,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 31 transitions, 108 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-12 16:33:12,934 INFO L231 Difference]: Finished difference. Result has 33 places, 31 transitions, 70 flow [2024-11-12 16:33:12,936 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=70, PETRI_PLACES=33, PETRI_TRANSITIONS=31} [2024-11-12 16:33:12,941 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, -5 predicate places. [2024-11-12 16:33:12,941 INFO L471 AbstractCegarLoop]: Abstraction has has 33 places, 31 transitions, 70 flow [2024-11-12 16:33:12,941 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 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) [2024-11-12 16:33:12,942 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:33:12,943 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-12 16:33:12,943 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-12 16:33:12,943 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-12 16:33:12,943 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:33:12,944 INFO L85 PathProgramCache]: Analyzing trace with hash 478633, now seen corresponding path program 1 times [2024-11-12 16:33:12,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:33:12,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065383044] [2024-11-12 16:33:12,944 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:33:12,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:33:12,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:33:13,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:33:13,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:33:13,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065383044] [2024-11-12 16:33:13,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065383044] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:33:13,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:33:13,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-12 16:33:13,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849251179] [2024-11-12 16:33:13,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:33:13,285 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-12 16:33:13,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:33:13,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-12 16:33:13,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-12 16:33:13,320 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 37 [2024-11-12 16:33:13,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 31 transitions, 70 flow. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 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) [2024-11-12 16:33:13,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:33:13,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 37 [2024-11-12 16:33:13,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:33:13,455 INFO L124 PetriNetUnfolderBase]: 89/214 cut-off events. [2024-11-12 16:33:13,456 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-12 16:33:13,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 384 conditions, 214 events. 89/214 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 887 event pairs, 64 based on Foata normal form. 0/163 useless extension candidates. Maximal degree in co-relation 362. Up to 158 conditions per place. [2024-11-12 16:33:13,459 INFO L140 encePairwiseOnDemand]: 33/37 looper letters, 22 selfloop transitions, 3 changer transitions 0/34 dead transitions. [2024-11-12 16:33:13,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 34 transitions, 128 flow [2024-11-12 16:33:13,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 16:33:13,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-12 16:33:13,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 65 transitions. [2024-11-12 16:33:13,462 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5855855855855856 [2024-11-12 16:33:13,462 INFO L175 Difference]: Start difference. First operand has 33 places, 31 transitions, 70 flow. Second operand 3 states and 65 transitions. [2024-11-12 16:33:13,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 34 transitions, 128 flow [2024-11-12 16:33:13,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 34 transitions, 122 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-12 16:33:13,464 INFO L231 Difference]: Finished difference. Result has 34 places, 33 transitions, 85 flow [2024-11-12 16:33:13,465 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=85, PETRI_PLACES=34, PETRI_TRANSITIONS=33} [2024-11-12 16:33:13,465 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, -4 predicate places. [2024-11-12 16:33:13,466 INFO L471 AbstractCegarLoop]: Abstraction has has 34 places, 33 transitions, 85 flow [2024-11-12 16:33:13,466 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 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) [2024-11-12 16:33:13,466 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:33:13,466 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-12 16:33:13,466 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-12 16:33:13,466 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-12 16:33:13,467 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:33:13,467 INFO L85 PathProgramCache]: Analyzing trace with hash 459981744, now seen corresponding path program 1 times [2024-11-12 16:33:13,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:33:13,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016050049] [2024-11-12 16:33:13,467 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:33:13,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:33:13,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:33:13,741 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:33:13,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:33:13,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016050049] [2024-11-12 16:33:13,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016050049] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:33:13,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322604571] [2024-11-12 16:33:13,744 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:33:13,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:33:13,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:33:13,747 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) [2024-11-12 16:33:13,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-12 16:33:13,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:33:13,820 INFO L256 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-12 16:33:13,824 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:33:13,897 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 [2024-11-12 16:33:14,048 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:33:14,049 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:33:14,170 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:33:14,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322604571] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:33:14,171 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:33:14,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-12 16:33:14,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764245970] [2024-11-12 16:33:14,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:33:14,172 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-12 16:33:14,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:33:14,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-12 16:33:14,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-11-12 16:33:14,282 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 37 [2024-11-12 16:33:14,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 33 transitions, 85 flow. Second operand has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 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) [2024-11-12 16:33:14,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:33:14,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 37 [2024-11-12 16:33:14,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:33:14,509 INFO L124 PetriNetUnfolderBase]: 89/213 cut-off events. [2024-11-12 16:33:14,509 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-12 16:33:14,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 387 conditions, 213 events. 89/213 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 882 event pairs, 64 based on Foata normal form. 0/163 useless extension candidates. Maximal degree in co-relation 362. Up to 154 conditions per place. [2024-11-12 16:33:14,511 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 18 selfloop transitions, 6 changer transitions 0/33 dead transitions. [2024-11-12 16:33:14,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 33 transitions, 131 flow [2024-11-12 16:33:14,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 16:33:14,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-12 16:33:14,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 90 transitions. [2024-11-12 16:33:14,515 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4864864864864865 [2024-11-12 16:33:14,515 INFO L175 Difference]: Start difference. First operand has 34 places, 33 transitions, 85 flow. Second operand 5 states and 90 transitions. [2024-11-12 16:33:14,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 33 transitions, 131 flow [2024-11-12 16:33:14,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 33 transitions, 128 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-12 16:33:14,517 INFO L231 Difference]: Finished difference. Result has 37 places, 33 transitions, 98 flow [2024-11-12 16:33:14,518 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=98, PETRI_PLACES=37, PETRI_TRANSITIONS=33} [2024-11-12 16:33:14,519 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, -1 predicate places. [2024-11-12 16:33:14,519 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 33 transitions, 98 flow [2024-11-12 16:33:14,520 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 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) [2024-11-12 16:33:14,520 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:33:14,520 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-12 16:33:14,538 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-12 16:33:14,724 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 [2024-11-12 16:33:14,725 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-12 16:33:14,726 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:33:14,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1376829362, now seen corresponding path program 1 times [2024-11-12 16:33:14,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:33:14,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276961629] [2024-11-12 16:33:14,726 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:33:14,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:33:14,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:33:14,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:33:14,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:33:14,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276961629] [2024-11-12 16:33:14,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276961629] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:33:14,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:33:14,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-12 16:33:14,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460839050] [2024-11-12 16:33:14,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:33:14,817 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-12 16:33:14,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:33:14,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-12 16:33:14,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-12 16:33:14,841 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 37 [2024-11-12 16:33:14,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 33 transitions, 98 flow. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 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) [2024-11-12 16:33:14,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:33:14,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 37 [2024-11-12 16:33:14,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:33:14,923 INFO L124 PetriNetUnfolderBase]: 89/186 cut-off events. [2024-11-12 16:33:14,924 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-11-12 16:33:14,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 368 conditions, 186 events. 89/186 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 626 event pairs, 64 based on Foata normal form. 0/163 useless extension candidates. Maximal degree in co-relation 343. Up to 153 conditions per place. [2024-11-12 16:33:14,928 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 21 selfloop transitions, 3 changer transitions 0/29 dead transitions. [2024-11-12 16:33:14,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 29 transitions, 138 flow [2024-11-12 16:33:14,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-12 16:33:14,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-12 16:33:14,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 61 transitions. [2024-11-12 16:33:14,931 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.41216216216216217 [2024-11-12 16:33:14,931 INFO L175 Difference]: Start difference. First operand has 37 places, 33 transitions, 98 flow. Second operand 4 states and 61 transitions. [2024-11-12 16:33:14,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 29 transitions, 138 flow [2024-11-12 16:33:14,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 29 transitions, 125 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-11-12 16:33:14,933 INFO L231 Difference]: Finished difference. Result has 33 places, 29 transitions, 83 flow [2024-11-12 16:33:14,934 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=77, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=83, PETRI_PLACES=33, PETRI_TRANSITIONS=29} [2024-11-12 16:33:14,934 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, -5 predicate places. [2024-11-12 16:33:14,934 INFO L471 AbstractCegarLoop]: Abstraction has has 33 places, 29 transitions, 83 flow [2024-11-12 16:33:14,935 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 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) [2024-11-12 16:33:14,935 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:33:14,935 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-12 16:33:14,935 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-12 16:33:14,935 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-12 16:33:14,936 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:33:14,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1376829363, now seen corresponding path program 1 times [2024-11-12 16:33:14,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:33:14,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895623980] [2024-11-12 16:33:14,939 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:33:14,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:33:14,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:33:15,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:33:15,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:33:15,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895623980] [2024-11-12 16:33:15,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895623980] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:33:15,008 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:33:15,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-12 16:33:15,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492873421] [2024-11-12 16:33:15,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:33:15,009 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-12 16:33:15,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:33:15,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 16:33:15,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 16:33:15,013 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2024-11-12 16:33:15,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 29 transitions, 83 flow. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:33:15,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:33:15,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2024-11-12 16:33:15,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:33:15,080 INFO L124 PetriNetUnfolderBase]: 88/185 cut-off events. [2024-11-12 16:33:15,080 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-12 16:33:15,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 360 conditions, 185 events. 88/185 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 616 event pairs, 64 based on Foata normal form. 1/163 useless extension candidates. Maximal degree in co-relation 335. Up to 156 conditions per place. [2024-11-12 16:33:15,081 INFO L140 encePairwiseOnDemand]: 34/37 looper letters, 21 selfloop transitions, 2 changer transitions 0/28 dead transitions. [2024-11-12 16:33:15,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 28 transitions, 124 flow [2024-11-12 16:33:15,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 16:33:15,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-12 16:33:15,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 66 transitions. [2024-11-12 16:33:15,083 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5945945945945946 [2024-11-12 16:33:15,083 INFO L175 Difference]: Start difference. First operand has 33 places, 29 transitions, 83 flow. Second operand 3 states and 66 transitions. [2024-11-12 16:33:15,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 28 transitions, 124 flow [2024-11-12 16:33:15,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 28 transitions, 121 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-12 16:33:15,084 INFO L231 Difference]: Finished difference. Result has 33 places, 28 transitions, 79 flow [2024-11-12 16:33:15,084 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=75, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=79, PETRI_PLACES=33, PETRI_TRANSITIONS=28} [2024-11-12 16:33:15,085 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, -5 predicate places. [2024-11-12 16:33:15,085 INFO L471 AbstractCegarLoop]: Abstraction has has 33 places, 28 transitions, 79 flow [2024-11-12 16:33:15,085 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:33:15,085 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:33:15,085 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:33:15,086 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-12 16:33:15,086 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-12 16:33:15,086 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:33:15,086 INFO L85 PathProgramCache]: Analyzing trace with hash -1921730484, now seen corresponding path program 1 times [2024-11-12 16:33:15,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:33:15,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494664868] [2024-11-12 16:33:15,090 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:33:15,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:33:15,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:33:15,301 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:33:15,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:33:15,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494664868] [2024-11-12 16:33:15,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494664868] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:33:15,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227679682] [2024-11-12 16:33:15,302 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:33:15,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:33:15,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:33:15,304 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) [2024-11-12 16:33:15,306 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-12 16:33:15,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:33:15,388 INFO L256 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-12 16:33:15,389 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:33:15,486 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:33:15,486 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:33:15,578 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 [2024-11-12 16:33:15,608 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:33:15,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227679682] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:33:15,609 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:33:15,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-12 16:33:15,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726618696] [2024-11-12 16:33:15,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:33:15,610 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-12 16:33:15,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:33:15,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-12 16:33:15,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-12 16:33:15,770 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 37 [2024-11-12 16:33:15,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 28 transitions, 79 flow. Second operand has 11 states, 11 states have (on average 15.181818181818182) internal successors, (167), 11 states have internal predecessors, (167), 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) [2024-11-12 16:33:15,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:33:15,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 37 [2024-11-12 16:33:15,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:33:15,943 INFO L124 PetriNetUnfolderBase]: 174/334 cut-off events. [2024-11-12 16:33:15,944 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-11-12 16:33:15,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 664 conditions, 334 events. 174/334 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1355 event pairs, 64 based on Foata normal form. 0/273 useless extension candidates. Maximal degree in co-relation 649. Up to 165 conditions per place. [2024-11-12 16:33:15,946 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 35 selfloop transitions, 4 changer transitions 0/43 dead transitions. [2024-11-12 16:33:15,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 43 transitions, 190 flow [2024-11-12 16:33:15,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 16:33:15,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-12 16:33:15,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 105 transitions. [2024-11-12 16:33:15,947 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5675675675675675 [2024-11-12 16:33:15,947 INFO L175 Difference]: Start difference. First operand has 33 places, 28 transitions, 79 flow. Second operand 5 states and 105 transitions. [2024-11-12 16:33:15,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 43 transitions, 190 flow [2024-11-12 16:33:15,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 43 transitions, 186 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-12 16:33:15,948 INFO L231 Difference]: Finished difference. Result has 36 places, 29 transitions, 91 flow [2024-11-12 16:33:15,948 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=75, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=91, PETRI_PLACES=36, PETRI_TRANSITIONS=29} [2024-11-12 16:33:15,949 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, -2 predicate places. [2024-11-12 16:33:15,949 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 29 transitions, 91 flow [2024-11-12 16:33:15,949 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 15.181818181818182) internal successors, (167), 11 states have internal predecessors, (167), 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) [2024-11-12 16:33:15,949 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:33:15,949 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:33:15,967 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-12 16:33:16,153 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 [2024-11-12 16:33:16,154 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-12 16:33:16,154 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:33:16,154 INFO L85 PathProgramCache]: Analyzing trace with hash 52957712, now seen corresponding path program 1 times [2024-11-12 16:33:16,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:33:16,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532805156] [2024-11-12 16:33:16,155 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:33:16,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:33:16,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:33:16,313 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:33:16,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:33:16,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532805156] [2024-11-12 16:33:16,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532805156] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:33:16,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892030276] [2024-11-12 16:33:16,314 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:33:16,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:33:16,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:33:16,316 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) [2024-11-12 16:33:16,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-12 16:33:16,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:33:16,381 INFO L256 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-12 16:33:16,383 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:33:16,512 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:33:16,513 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:33:16,577 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 [2024-11-12 16:33:16,753 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:33:16,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892030276] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:33:16,753 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:33:16,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2024-11-12 16:33:16,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32377576] [2024-11-12 16:33:16,754 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:33:16,754 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-12 16:33:16,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:33:16,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-12 16:33:16,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2024-11-12 16:33:17,103 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 37 [2024-11-12 16:33:17,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 29 transitions, 91 flow. Second operand has 17 states, 17 states have (on average 14.764705882352942) internal successors, (251), 17 states have internal predecessors, (251), 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) [2024-11-12 16:33:17,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:33:17,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 37 [2024-11-12 16:33:17,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:33:17,510 INFO L124 PetriNetUnfolderBase]: 366/744 cut-off events. [2024-11-12 16:33:17,510 INFO L125 PetriNetUnfolderBase]: For 62/62 co-relation queries the response was YES. [2024-11-12 16:33:17,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1538 conditions, 744 events. 366/744 cut-off events. For 62/62 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3824 event pairs, 189 based on Foata normal form. 0/625 useless extension candidates. Maximal degree in co-relation 781. Up to 305 conditions per place. [2024-11-12 16:33:17,537 INFO L140 encePairwiseOnDemand]: 29/37 looper letters, 63 selfloop transitions, 11 changer transitions 0/78 dead transitions. [2024-11-12 16:33:17,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 78 transitions, 367 flow [2024-11-12 16:33:17,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-12 16:33:17,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-12 16:33:17,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 177 transitions. [2024-11-12 16:33:17,539 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.597972972972973 [2024-11-12 16:33:17,539 INFO L175 Difference]: Start difference. First operand has 36 places, 29 transitions, 91 flow. Second operand 8 states and 177 transitions. [2024-11-12 16:33:17,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 78 transitions, 367 flow [2024-11-12 16:33:17,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 78 transitions, 358 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-12 16:33:17,541 INFO L231 Difference]: Finished difference. Result has 45 places, 37 transitions, 172 flow [2024-11-12 16:33:17,541 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=85, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=172, PETRI_PLACES=45, PETRI_TRANSITIONS=37} [2024-11-12 16:33:17,542 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 7 predicate places. [2024-11-12 16:33:17,542 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 37 transitions, 172 flow [2024-11-12 16:33:17,542 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 14.764705882352942) internal successors, (251), 17 states have internal predecessors, (251), 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) [2024-11-12 16:33:17,543 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:33:17,543 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:33:17,559 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-12 16:33:17,743 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 [2024-11-12 16:33:17,744 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-12 16:33:17,744 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:33:17,744 INFO L85 PathProgramCache]: Analyzing trace with hash 30466660, now seen corresponding path program 1 times [2024-11-12 16:33:17,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:33:17,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860663786] [2024-11-12 16:33:17,745 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:33:17,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:33:17,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:33:17,883 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:33:17,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:33:17,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860663786] [2024-11-12 16:33:17,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860663786] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:33:17,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348085196] [2024-11-12 16:33:17,884 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:33:17,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:33:17,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:33:17,886 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) [2024-11-12 16:33:17,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-12 16:33:17,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:33:17,953 INFO L256 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-12 16:33:17,954 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:33:18,037 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:33:18,038 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:33:18,100 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 [2024-11-12 16:33:18,127 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:33:18,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348085196] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:33:18,127 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:33:18,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-12 16:33:18,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364182659] [2024-11-12 16:33:18,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:33:18,128 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-12 16:33:18,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:33:18,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-12 16:33:18,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-11-12 16:33:18,275 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 37 [2024-11-12 16:33:18,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 37 transitions, 172 flow. Second operand has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 11 states have internal predecessors, (151), 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) [2024-11-12 16:33:18,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:33:18,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 37 [2024-11-12 16:33:18,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:33:18,541 INFO L124 PetriNetUnfolderBase]: 583/1037 cut-off events. [2024-11-12 16:33:18,542 INFO L125 PetriNetUnfolderBase]: For 615/663 co-relation queries the response was YES. [2024-11-12 16:33:18,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2591 conditions, 1037 events. 583/1037 cut-off events. For 615/663 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 4739 event pairs, 162 based on Foata normal form. 32/941 useless extension candidates. Maximal degree in co-relation 1667. Up to 665 conditions per place. [2024-11-12 16:33:18,548 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 43 selfloop transitions, 6 changer transitions 0/51 dead transitions. [2024-11-12 16:33:18,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 51 transitions, 322 flow [2024-11-12 16:33:18,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 16:33:18,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-12 16:33:18,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 93 transitions. [2024-11-12 16:33:18,550 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5027027027027027 [2024-11-12 16:33:18,550 INFO L175 Difference]: Start difference. First operand has 45 places, 37 transitions, 172 flow. Second operand 5 states and 93 transitions. [2024-11-12 16:33:18,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 51 transitions, 322 flow [2024-11-12 16:33:18,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 51 transitions, 320 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-12 16:33:18,558 INFO L231 Difference]: Finished difference. Result has 49 places, 38 transitions, 194 flow [2024-11-12 16:33:18,558 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=194, PETRI_PLACES=49, PETRI_TRANSITIONS=38} [2024-11-12 16:33:18,559 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 11 predicate places. [2024-11-12 16:33:18,560 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 38 transitions, 194 flow [2024-11-12 16:33:18,561 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 11 states have internal predecessors, (151), 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) [2024-11-12 16:33:18,561 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:33:18,561 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:33:18,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-12 16:33:18,761 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 [2024-11-12 16:33:18,762 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-12 16:33:18,762 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:33:18,762 INFO L85 PathProgramCache]: Analyzing trace with hash 944466959, now seen corresponding path program 1 times [2024-11-12 16:33:18,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:33:18,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397009426] [2024-11-12 16:33:18,763 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:33:18,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:33:18,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:33:18,892 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:33:18,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:33:18,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397009426] [2024-11-12 16:33:18,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397009426] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:33:18,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918929028] [2024-11-12 16:33:18,893 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:33:18,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:33:18,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:33:18,895 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) [2024-11-12 16:33:18,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-12 16:33:18,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:33:18,957 INFO L256 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-12 16:33:18,958 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:33:19,066 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:33:19,066 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:33:19,103 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 [2024-11-12 16:33:19,313 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:33:19,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918929028] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:33:19,314 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:33:19,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2024-11-12 16:33:19,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201314002] [2024-11-12 16:33:19,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:33:19,315 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-12 16:33:19,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:33:19,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-12 16:33:19,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2024-11-12 16:33:19,486 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 37 [2024-11-12 16:33:19,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 38 transitions, 194 flow. Second operand has 14 states, 14 states have (on average 13.357142857142858) internal successors, (187), 14 states have internal predecessors, (187), 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) [2024-11-12 16:33:19,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:33:19,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 37 [2024-11-12 16:33:19,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:33:19,831 INFO L124 PetriNetUnfolderBase]: 629/1108 cut-off events. [2024-11-12 16:33:19,831 INFO L125 PetriNetUnfolderBase]: For 780/843 co-relation queries the response was YES. [2024-11-12 16:33:19,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2895 conditions, 1108 events. 629/1108 cut-off events. For 780/843 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 5040 event pairs, 330 based on Foata normal form. 0/980 useless extension candidates. Maximal degree in co-relation 1794. Up to 841 conditions per place. [2024-11-12 16:33:19,838 INFO L140 encePairwiseOnDemand]: 29/37 looper letters, 53 selfloop transitions, 9 changer transitions 0/64 dead transitions. [2024-11-12 16:33:19,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 64 transitions, 410 flow [2024-11-12 16:33:19,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-12 16:33:19,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-12 16:33:19,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-11-12 16:33:19,840 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5057915057915058 [2024-11-12 16:33:19,840 INFO L175 Difference]: Start difference. First operand has 49 places, 38 transitions, 194 flow. Second operand 7 states and 131 transitions. [2024-11-12 16:33:19,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 64 transitions, 410 flow [2024-11-12 16:33:19,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 64 transitions, 399 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-11-12 16:33:19,845 INFO L231 Difference]: Finished difference. Result has 54 places, 40 transitions, 224 flow [2024-11-12 16:33:19,845 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=224, PETRI_PLACES=54, PETRI_TRANSITIONS=40} [2024-11-12 16:33:19,846 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 16 predicate places. [2024-11-12 16:33:19,847 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 40 transitions, 224 flow [2024-11-12 16:33:19,847 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 13.357142857142858) internal successors, (187), 14 states have internal predecessors, (187), 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) [2024-11-12 16:33:19,847 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:33:19,847 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-12 16:33:19,864 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-12 16:33:20,048 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 [2024-11-12 16:33:20,048 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-12 16:33:20,049 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:33:20,049 INFO L85 PathProgramCache]: Analyzing trace with hash -2076436951, now seen corresponding path program 2 times [2024-11-12 16:33:20,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:33:20,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172507272] [2024-11-12 16:33:20,049 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:33:20,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:33:20,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:33:20,233 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-12 16:33:20,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:33:20,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172507272] [2024-11-12 16:33:20,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172507272] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:33:20,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994692486] [2024-11-12 16:33:20,234 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-12 16:33:20,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:33:20,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:33:20,237 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) [2024-11-12 16:33:20,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-12 16:33:20,312 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-12 16:33:20,312 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 16:33:20,312 INFO L256 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-12 16:33:20,314 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:33:20,329 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 [2024-11-12 16:33:20,547 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-12 16:33:20,547 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:33:20,700 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-12 16:33:20,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994692486] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:33:20,700 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:33:20,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 10 [2024-11-12 16:33:20,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92116430] [2024-11-12 16:33:20,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:33:20,701 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-12 16:33:20,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:33:20,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-12 16:33:20,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-11-12 16:33:20,957 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 37 [2024-11-12 16:33:20,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 40 transitions, 224 flow. Second operand has 12 states, 12 states have (on average 15.583333333333334) internal successors, (187), 12 states have internal predecessors, (187), 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) [2024-11-12 16:33:20,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:33:20,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 37 [2024-11-12 16:33:20,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:33:21,219 INFO L124 PetriNetUnfolderBase]: 491/943 cut-off events. [2024-11-12 16:33:21,219 INFO L125 PetriNetUnfolderBase]: For 478/478 co-relation queries the response was YES. [2024-11-12 16:33:21,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2494 conditions, 943 events. 491/943 cut-off events. For 478/478 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 4790 event pairs, 280 based on Foata normal form. 0/879 useless extension candidates. Maximal degree in co-relation 1588. Up to 640 conditions per place. [2024-11-12 16:33:21,226 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 38 selfloop transitions, 10 changer transitions 0/52 dead transitions. [2024-11-12 16:33:21,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 52 transitions, 372 flow [2024-11-12 16:33:21,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 16:33:21,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-12 16:33:21,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 96 transitions. [2024-11-12 16:33:21,227 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.518918918918919 [2024-11-12 16:33:21,227 INFO L175 Difference]: Start difference. First operand has 54 places, 40 transitions, 224 flow. Second operand 5 states and 96 transitions. [2024-11-12 16:33:21,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 52 transitions, 372 flow [2024-11-12 16:33:21,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 52 transitions, 355 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-11-12 16:33:21,230 INFO L231 Difference]: Finished difference. Result has 53 places, 39 transitions, 224 flow [2024-11-12 16:33:21,231 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=224, PETRI_PLACES=53, PETRI_TRANSITIONS=39} [2024-11-12 16:33:21,231 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 15 predicate places. [2024-11-12 16:33:21,231 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 39 transitions, 224 flow [2024-11-12 16:33:21,232 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 15.583333333333334) internal successors, (187), 12 states have internal predecessors, (187), 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) [2024-11-12 16:33:21,232 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:33:21,232 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:33:21,246 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-12 16:33:21,432 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:33:21,433 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-12 16:33:21,433 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:33:21,433 INFO L85 PathProgramCache]: Analyzing trace with hash -642258154, now seen corresponding path program 2 times [2024-11-12 16:33:21,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:33:21,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125549096] [2024-11-12 16:33:21,433 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:33:21,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:33:21,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:33:21,642 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-12 16:33:21,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:33:21,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125549096] [2024-11-12 16:33:21,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125549096] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:33:21,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000147445] [2024-11-12 16:33:21,644 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-12 16:33:21,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:33:21,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:33:21,646 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) [2024-11-12 16:33:21,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-12 16:33:21,755 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-12 16:33:21,756 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 16:33:21,757 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-12 16:33:21,759 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:33:21,778 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 [2024-11-12 16:33:22,014 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-12 16:33:22,014 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-12 16:33:22,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000147445] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:33:22,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-12 16:33:22,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 7 [2024-11-12 16:33:22,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615683922] [2024-11-12 16:33:22,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:33:22,015 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 16:33:22,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:33:22,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 16:33:22,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-12 16:33:22,076 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 37 [2024-11-12 16:33:22,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 39 transitions, 224 flow. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:33:22,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:33:22,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 37 [2024-11-12 16:33:22,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:33:22,375 INFO L124 PetriNetUnfolderBase]: 675/1183 cut-off events. [2024-11-12 16:33:22,375 INFO L125 PetriNetUnfolderBase]: For 1437/1437 co-relation queries the response was YES. [2024-11-12 16:33:22,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3406 conditions, 1183 events. 675/1183 cut-off events. For 1437/1437 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 5387 event pairs, 120 based on Foata normal form. 16/1071 useless extension candidates. Maximal degree in co-relation 2122. Up to 665 conditions per place. [2024-11-12 16:33:22,383 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 58 selfloop transitions, 6 changer transitions 0/65 dead transitions. [2024-11-12 16:33:22,384 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 65 transitions, 485 flow [2024-11-12 16:33:22,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 16:33:22,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-12 16:33:22,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 100 transitions. [2024-11-12 16:33:22,385 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5405405405405406 [2024-11-12 16:33:22,385 INFO L175 Difference]: Start difference. First operand has 53 places, 39 transitions, 224 flow. Second operand 5 states and 100 transitions. [2024-11-12 16:33:22,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 65 transitions, 485 flow [2024-11-12 16:33:22,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 65 transitions, 441 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-12 16:33:22,390 INFO L231 Difference]: Finished difference. Result has 55 places, 41 transitions, 236 flow [2024-11-12 16:33:22,390 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=236, PETRI_PLACES=55, PETRI_TRANSITIONS=41} [2024-11-12 16:33:22,391 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 17 predicate places. [2024-11-12 16:33:22,391 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 41 transitions, 236 flow [2024-11-12 16:33:22,391 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:33:22,391 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:33:22,391 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:33:22,410 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-12 16:33:22,595 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:33:22,596 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-12 16:33:22,596 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:33:22,596 INFO L85 PathProgramCache]: Analyzing trace with hash 284917643, now seen corresponding path program 1 times [2024-11-12 16:33:22,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:33:22,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257154043] [2024-11-12 16:33:22,597 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:33:22,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:33:22,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:33:22,766 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:33:22,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:33:22,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257154043] [2024-11-12 16:33:22,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257154043] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:33:22,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874933154] [2024-11-12 16:33:22,767 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:33:22,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:33:22,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:33:22,769 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) [2024-11-12 16:33:22,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-12 16:33:22,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:33:22,845 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-12 16:33:22,846 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:33:22,996 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:33:22,996 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:33:23,077 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 [2024-11-12 16:33:23,249 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:33:23,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874933154] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:33:23,249 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:33:23,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2024-11-12 16:33:23,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144207172] [2024-11-12 16:33:23,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:33:23,250 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-12 16:33:23,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:33:23,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-12 16:33:23,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2024-11-12 16:33:23,524 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 37 [2024-11-12 16:33:23,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 41 transitions, 236 flow. Second operand has 17 states, 17 states have (on average 13.470588235294118) internal successors, (229), 17 states have internal predecessors, (229), 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) [2024-11-12 16:33:23,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:33:23,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 37 [2024-11-12 16:33:23,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:33:23,997 INFO L124 PetriNetUnfolderBase]: 616/1083 cut-off events. [2024-11-12 16:33:23,997 INFO L125 PetriNetUnfolderBase]: For 973/973 co-relation queries the response was YES. [2024-11-12 16:33:24,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3128 conditions, 1083 events. 616/1083 cut-off events. For 973/973 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 4772 event pairs, 333 based on Foata normal form. 16/1067 useless extension candidates. Maximal degree in co-relation 2153. Up to 587 conditions per place. [2024-11-12 16:33:24,005 INFO L140 encePairwiseOnDemand]: 26/37 looper letters, 73 selfloop transitions, 13 changer transitions 0/87 dead transitions. [2024-11-12 16:33:24,005 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 87 transitions, 566 flow [2024-11-12 16:33:24,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-12 16:33:24,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-12 16:33:24,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-11-12 16:33:24,006 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5345345345345346 [2024-11-12 16:33:24,006 INFO L175 Difference]: Start difference. First operand has 55 places, 41 transitions, 236 flow. Second operand 9 states and 178 transitions. [2024-11-12 16:33:24,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 87 transitions, 566 flow [2024-11-12 16:33:24,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 87 transitions, 552 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-11-12 16:33:24,012 INFO L231 Difference]: Finished difference. Result has 64 places, 45 transitions, 300 flow [2024-11-12 16:33:24,012 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=300, PETRI_PLACES=64, PETRI_TRANSITIONS=45} [2024-11-12 16:33:24,014 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 26 predicate places. [2024-11-12 16:33:24,015 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 45 transitions, 300 flow [2024-11-12 16:33:24,015 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 13.470588235294118) internal successors, (229), 17 states have internal predecessors, (229), 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) [2024-11-12 16:33:24,015 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:33:24,015 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:33:24,032 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-12 16:33:24,215 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,SelfDestructingSolverStorable11 [2024-11-12 16:33:24,216 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-12 16:33:24,217 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:33:24,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1955461207, now seen corresponding path program 1 times [2024-11-12 16:33:24,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:33:24,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696451434] [2024-11-12 16:33:24,217 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:33:24,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:33:24,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:33:24,268 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 16:33:24,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:33:24,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696451434] [2024-11-12 16:33:24,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696451434] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:33:24,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:33:24,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-12 16:33:24,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731323749] [2024-11-12 16:33:24,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:33:24,270 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-12 16:33:24,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:33:24,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 16:33:24,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 16:33:24,278 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2024-11-12 16:33:24,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 45 transitions, 300 flow. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:33:24,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:33:24,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2024-11-12 16:33:24,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:33:24,395 INFO L124 PetriNetUnfolderBase]: 547/1010 cut-off events. [2024-11-12 16:33:24,396 INFO L125 PetriNetUnfolderBase]: For 1416/1416 co-relation queries the response was YES. [2024-11-12 16:33:24,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3067 conditions, 1010 events. 547/1010 cut-off events. For 1416/1416 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 4699 event pairs, 159 based on Foata normal form. 2/1012 useless extension candidates. Maximal degree in co-relation 2050. Up to 774 conditions per place. [2024-11-12 16:33:24,402 INFO L140 encePairwiseOnDemand]: 33/37 looper letters, 48 selfloop transitions, 5 changer transitions 1/58 dead transitions. [2024-11-12 16:33:24,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 58 transitions, 453 flow [2024-11-12 16:33:24,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 16:33:24,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-12 16:33:24,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 77 transitions. [2024-11-12 16:33:24,403 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6936936936936937 [2024-11-12 16:33:24,403 INFO L175 Difference]: Start difference. First operand has 64 places, 45 transitions, 300 flow. Second operand 3 states and 77 transitions. [2024-11-12 16:33:24,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 58 transitions, 453 flow [2024-11-12 16:33:24,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 58 transitions, 435 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-11-12 16:33:24,410 INFO L231 Difference]: Finished difference. Result has 62 places, 47 transitions, 315 flow [2024-11-12 16:33:24,410 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=282, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=315, PETRI_PLACES=62, PETRI_TRANSITIONS=47} [2024-11-12 16:33:24,411 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 24 predicate places. [2024-11-12 16:33:24,411 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 47 transitions, 315 flow [2024-11-12 16:33:24,411 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:33:24,411 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:33:24,411 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:33:24,411 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-12 16:33:24,411 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-12 16:33:24,412 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:33:24,412 INFO L85 PathProgramCache]: Analyzing trace with hash 567136036, now seen corresponding path program 2 times [2024-11-12 16:33:24,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:33:24,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192196656] [2024-11-12 16:33:24,412 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:33:24,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:33:24,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:33:24,634 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-12 16:33:24,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:33:24,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192196656] [2024-11-12 16:33:24,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192196656] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:33:24,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570054123] [2024-11-12 16:33:24,634 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-12 16:33:24,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:33:24,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:33:24,636 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) [2024-11-12 16:33:24,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-12 16:33:24,712 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-12 16:33:24,712 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 16:33:24,714 INFO L256 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-12 16:33:24,715 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:33:24,733 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 [2024-11-12 16:33:24,943 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-12 16:33:24,943 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:33:25,129 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-12 16:33:25,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570054123] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:33:25,129 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:33:25,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 10 [2024-11-12 16:33:25,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998766773] [2024-11-12 16:33:25,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:33:25,130 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-12 16:33:25,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:33:25,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-12 16:33:25,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-11-12 16:33:25,311 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 37 [2024-11-12 16:33:25,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 47 transitions, 315 flow. Second operand has 12 states, 12 states have (on average 14.583333333333334) internal successors, (175), 12 states have internal predecessors, (175), 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) [2024-11-12 16:33:25,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:33:25,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 37 [2024-11-12 16:33:25,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:33:25,578 INFO L124 PetriNetUnfolderBase]: 547/962 cut-off events. [2024-11-12 16:33:25,578 INFO L125 PetriNetUnfolderBase]: For 1463/1463 co-relation queries the response was YES. [2024-11-12 16:33:25,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2999 conditions, 962 events. 547/962 cut-off events. For 1463/1463 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 4170 event pairs, 196 based on Foata normal form. 32/994 useless extension candidates. Maximal degree in co-relation 1975. Up to 485 conditions per place. [2024-11-12 16:33:25,584 INFO L140 encePairwiseOnDemand]: 30/37 looper letters, 44 selfloop transitions, 11 changer transitions 0/56 dead transitions. [2024-11-12 16:33:25,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 56 transitions, 478 flow [2024-11-12 16:33:25,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 16:33:25,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-12 16:33:25,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 85 transitions. [2024-11-12 16:33:25,586 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4594594594594595 [2024-11-12 16:33:25,586 INFO L175 Difference]: Start difference. First operand has 62 places, 47 transitions, 315 flow. Second operand 5 states and 85 transitions. [2024-11-12 16:33:25,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 56 transitions, 478 flow [2024-11-12 16:33:25,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 56 transitions, 471 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-12 16:33:25,591 INFO L231 Difference]: Finished difference. Result has 62 places, 44 transitions, 314 flow [2024-11-12 16:33:25,591 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=314, PETRI_PLACES=62, PETRI_TRANSITIONS=44} [2024-11-12 16:33:25,592 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 24 predicate places. [2024-11-12 16:33:25,592 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 44 transitions, 314 flow [2024-11-12 16:33:25,592 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 14.583333333333334) internal successors, (175), 12 states have internal predecessors, (175), 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) [2024-11-12 16:33:25,592 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:33:25,592 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:33:25,610 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-12 16:33:25,793 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-12 16:33:25,793 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-12 16:33:25,793 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:33:25,793 INFO L85 PathProgramCache]: Analyzing trace with hash -1110633781, now seen corresponding path program 1 times [2024-11-12 16:33:25,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:33:25,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715711280] [2024-11-12 16:33:25,794 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:33:25,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:33:25,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:33:25,900 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 16:33:25,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:33:25,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715711280] [2024-11-12 16:33:25,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715711280] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:33:25,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:33:25,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-12 16:33:25,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989834602] [2024-11-12 16:33:25,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:33:25,901 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-12 16:33:25,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:33:25,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-12 16:33:25,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-12 16:33:25,901 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2024-11-12 16:33:25,902 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 44 transitions, 314 flow. Second operand has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 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) [2024-11-12 16:33:25,902 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:33:25,902 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2024-11-12 16:33:25,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:33:26,105 INFO L124 PetriNetUnfolderBase]: 577/1035 cut-off events. [2024-11-12 16:33:26,105 INFO L125 PetriNetUnfolderBase]: For 2151/2151 co-relation queries the response was YES. [2024-11-12 16:33:26,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3502 conditions, 1035 events. 577/1035 cut-off events. For 2151/2151 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 4828 event pairs, 79 based on Foata normal form. 50/1085 useless extension candidates. Maximal degree in co-relation 2363. Up to 530 conditions per place. [2024-11-12 16:33:26,113 INFO L140 encePairwiseOnDemand]: 29/37 looper letters, 79 selfloop transitions, 18 changer transitions 1/99 dead transitions. [2024-11-12 16:33:26,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 99 transitions, 826 flow [2024-11-12 16:33:26,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-12 16:33:26,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-12 16:33:26,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-11-12 16:33:26,114 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6332046332046332 [2024-11-12 16:33:26,114 INFO L175 Difference]: Start difference. First operand has 62 places, 44 transitions, 314 flow. Second operand 7 states and 164 transitions. [2024-11-12 16:33:26,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 99 transitions, 826 flow [2024-11-12 16:33:26,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 99 transitions, 780 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-12 16:33:26,124 INFO L231 Difference]: Finished difference. Result has 70 places, 57 transitions, 492 flow [2024-11-12 16:33:26,124 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=492, PETRI_PLACES=70, PETRI_TRANSITIONS=57} [2024-11-12 16:33:26,125 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 32 predicate places. [2024-11-12 16:33:26,125 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 57 transitions, 492 flow [2024-11-12 16:33:26,126 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 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) [2024-11-12 16:33:26,126 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:33:26,126 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:33:26,126 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-12 16:33:26,126 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-12 16:33:26,126 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:33:26,126 INFO L85 PathProgramCache]: Analyzing trace with hash 1318197267, now seen corresponding path program 2 times [2024-11-12 16:33:26,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:33:26,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333793400] [2024-11-12 16:33:26,127 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:33:26,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:33:26,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:33:26,217 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 16:33:26,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:33:26,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333793400] [2024-11-12 16:33:26,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333793400] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:33:26,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:33:26,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-12 16:33:26,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992616771] [2024-11-12 16:33:26,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:33:26,218 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 16:33:26,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:33:26,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 16:33:26,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-12 16:33:26,219 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2024-11-12 16:33:26,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 57 transitions, 492 flow. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 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) [2024-11-12 16:33:26,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:33:26,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2024-11-12 16:33:26,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:33:26,457 INFO L124 PetriNetUnfolderBase]: 569/1039 cut-off events. [2024-11-12 16:33:26,457 INFO L125 PetriNetUnfolderBase]: For 3345/3345 co-relation queries the response was YES. [2024-11-12 16:33:26,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4079 conditions, 1039 events. 569/1039 cut-off events. For 3345/3345 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 4893 event pairs, 217 based on Foata normal form. 12/1051 useless extension candidates. Maximal degree in co-relation 2881. Up to 704 conditions per place. [2024-11-12 16:33:26,466 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 64 selfloop transitions, 14 changer transitions 5/84 dead transitions. [2024-11-12 16:33:26,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 84 transitions, 823 flow [2024-11-12 16:33:26,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 16:33:26,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-12 16:33:26,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 113 transitions. [2024-11-12 16:33:26,468 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6108108108108108 [2024-11-12 16:33:26,468 INFO L175 Difference]: Start difference. First operand has 70 places, 57 transitions, 492 flow. Second operand 5 states and 113 transitions. [2024-11-12 16:33:26,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 84 transitions, 823 flow [2024-11-12 16:33:26,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 84 transitions, 799 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-11-12 16:33:26,478 INFO L231 Difference]: Finished difference. Result has 76 places, 58 transitions, 535 flow [2024-11-12 16:33:26,479 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=474, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=535, PETRI_PLACES=76, PETRI_TRANSITIONS=58} [2024-11-12 16:33:26,479 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 38 predicate places. [2024-11-12 16:33:26,479 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 58 transitions, 535 flow [2024-11-12 16:33:26,479 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 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) [2024-11-12 16:33:26,480 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:33:26,480 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:33:26,480 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-12 16:33:26,480 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-12 16:33:26,481 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:33:26,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1967926141, now seen corresponding path program 3 times [2024-11-12 16:33:26,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:33:26,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371033530] [2024-11-12 16:33:26,481 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:33:26,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:33:26,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:33:26,572 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 16:33:26,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:33:26,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371033530] [2024-11-12 16:33:26,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371033530] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:33:26,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529812544] [2024-11-12 16:33:26,573 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-12 16:33:26,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:33:26,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:33:26,574 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) [2024-11-12 16:33:26,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-12 16:33:26,642 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-12 16:33:26,642 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 16:33:26,643 INFO L256 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-12 16:33:26,644 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:33:26,665 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 16:33:26,666 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:33:26,703 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 16:33:26,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529812544] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:33:26,703 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:33:26,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4] total 8 [2024-11-12 16:33:26,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639163159] [2024-11-12 16:33:26,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:33:26,704 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-12 16:33:26,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:33:26,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-12 16:33:26,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-11-12 16:33:26,705 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2024-11-12 16:33:26,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 58 transitions, 535 flow. Second operand has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 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) [2024-11-12 16:33:26,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:33:26,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2024-11-12 16:33:26,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:33:27,030 INFO L124 PetriNetUnfolderBase]: 745/1343 cut-off events. [2024-11-12 16:33:27,031 INFO L125 PetriNetUnfolderBase]: For 6229/6229 co-relation queries the response was YES. [2024-11-12 16:33:27,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6028 conditions, 1343 events. 745/1343 cut-off events. For 6229/6229 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 6757 event pairs, 162 based on Foata normal form. 18/1361 useless extension candidates. Maximal degree in co-relation 4752. Up to 524 conditions per place. [2024-11-12 16:33:27,044 INFO L140 encePairwiseOnDemand]: 29/37 looper letters, 81 selfloop transitions, 70 changer transitions 3/155 dead transitions. [2024-11-12 16:33:27,044 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 155 transitions, 1634 flow [2024-11-12 16:33:27,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-12 16:33:27,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-12 16:33:27,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 226 transitions. [2024-11-12 16:33:27,045 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6108108108108108 [2024-11-12 16:33:27,045 INFO L175 Difference]: Start difference. First operand has 76 places, 58 transitions, 535 flow. Second operand 10 states and 226 transitions. [2024-11-12 16:33:27,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 155 transitions, 1634 flow [2024-11-12 16:33:27,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 155 transitions, 1570 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-11-12 16:33:27,063 INFO L231 Difference]: Finished difference. Result has 89 places, 102 transitions, 1264 flow [2024-11-12 16:33:27,063 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=504, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1264, PETRI_PLACES=89, PETRI_TRANSITIONS=102} [2024-11-12 16:33:27,064 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 51 predicate places. [2024-11-12 16:33:27,064 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 102 transitions, 1264 flow [2024-11-12 16:33:27,064 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 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) [2024-11-12 16:33:27,064 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:33:27,064 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:33:27,081 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-12 16:33:27,268 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-12 16:33:27,268 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-12 16:33:27,269 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:33:27,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1693086549, now seen corresponding path program 4 times [2024-11-12 16:33:27,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:33:27,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875840135] [2024-11-12 16:33:27,269 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:33:27,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:33:27,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:33:27,374 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 16:33:27,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:33:27,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875840135] [2024-11-12 16:33:27,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875840135] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:33:27,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:33:27,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-12 16:33:27,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531554508] [2024-11-12 16:33:27,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:33:27,375 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 16:33:27,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:33:27,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 16:33:27,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-12 16:33:27,375 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2024-11-12 16:33:27,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 102 transitions, 1264 flow. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 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) [2024-11-12 16:33:27,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:33:27,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2024-11-12 16:33:27,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:33:27,619 INFO L124 PetriNetUnfolderBase]: 745/1343 cut-off events. [2024-11-12 16:33:27,620 INFO L125 PetriNetUnfolderBase]: For 9430/9430 co-relation queries the response was YES. [2024-11-12 16:33:27,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7240 conditions, 1343 events. 745/1343 cut-off events. For 9430/9430 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 6673 event pairs, 222 based on Foata normal form. 4/1347 useless extension candidates. Maximal degree in co-relation 5720. Up to 780 conditions per place. [2024-11-12 16:33:27,642 INFO L140 encePairwiseOnDemand]: 30/37 looper letters, 85 selfloop transitions, 38 changer transitions 2/126 dead transitions. [2024-11-12 16:33:27,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 126 transitions, 1715 flow [2024-11-12 16:33:27,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 16:33:27,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-12 16:33:27,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 117 transitions. [2024-11-12 16:33:27,643 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6324324324324324 [2024-11-12 16:33:27,643 INFO L175 Difference]: Start difference. First operand has 89 places, 102 transitions, 1264 flow. Second operand 5 states and 117 transitions. [2024-11-12 16:33:27,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 126 transitions, 1715 flow [2024-11-12 16:33:27,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 126 transitions, 1677 flow, removed 19 selfloop flow, removed 0 redundant places. [2024-11-12 16:33:27,681 INFO L231 Difference]: Finished difference. Result has 95 places, 108 transitions, 1420 flow [2024-11-12 16:33:27,681 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1232, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1420, PETRI_PLACES=95, PETRI_TRANSITIONS=108} [2024-11-12 16:33:27,682 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 57 predicate places. [2024-11-12 16:33:27,682 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 108 transitions, 1420 flow [2024-11-12 16:33:27,682 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 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) [2024-11-12 16:33:27,682 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:33:27,683 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:33:27,683 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-12 16:33:27,683 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-12 16:33:27,684 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:33:27,684 INFO L85 PathProgramCache]: Analyzing trace with hash 25257157, now seen corresponding path program 5 times [2024-11-12 16:33:27,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:33:27,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938930672] [2024-11-12 16:33:27,685 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:33:27,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:33:27,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:33:27,777 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 16:33:27,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:33:27,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938930672] [2024-11-12 16:33:27,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938930672] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:33:27,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363083650] [2024-11-12 16:33:27,778 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-12 16:33:27,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:33:27,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:33:27,780 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) [2024-11-12 16:33:27,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-12 16:33:27,850 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-12 16:33:27,850 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 16:33:27,851 INFO L256 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-12 16:33:27,852 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:33:27,868 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 16:33:27,868 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:33:27,902 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 16:33:27,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363083650] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:33:27,903 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:33:27,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2024-11-12 16:33:27,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151423162] [2024-11-12 16:33:27,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:33:27,903 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-12 16:33:27,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:33:27,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-12 16:33:27,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-11-12 16:33:27,904 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2024-11-12 16:33:27,904 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 108 transitions, 1420 flow. Second operand has 9 states, 9 states have (on average 16.666666666666668) internal successors, (150), 9 states have internal predecessors, (150), 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) [2024-11-12 16:33:27,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:33:27,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2024-11-12 16:33:27,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:33:28,265 INFO L124 PetriNetUnfolderBase]: 743/1331 cut-off events. [2024-11-12 16:33:28,265 INFO L125 PetriNetUnfolderBase]: For 10892/10892 co-relation queries the response was YES. [2024-11-12 16:33:28,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7449 conditions, 1331 events. 743/1331 cut-off events. For 10892/10892 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 6547 event pairs, 192 based on Foata normal form. 14/1345 useless extension candidates. Maximal degree in co-relation 5908. Up to 702 conditions per place. [2024-11-12 16:33:28,279 INFO L140 encePairwiseOnDemand]: 29/37 looper letters, 78 selfloop transitions, 57 changer transitions 4/140 dead transitions. [2024-11-12 16:33:28,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 140 transitions, 1926 flow [2024-11-12 16:33:28,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-12 16:33:28,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-12 16:33:28,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 173 transitions. [2024-11-12 16:33:28,282 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5844594594594594 [2024-11-12 16:33:28,282 INFO L175 Difference]: Start difference. First operand has 95 places, 108 transitions, 1420 flow. Second operand 8 states and 173 transitions. [2024-11-12 16:33:28,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 140 transitions, 1926 flow [2024-11-12 16:33:28,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 140 transitions, 1881 flow, removed 8 selfloop flow, removed 1 redundant places. [2024-11-12 16:33:28,320 INFO L231 Difference]: Finished difference. Result has 103 places, 112 transitions, 1569 flow [2024-11-12 16:33:28,321 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1381, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1569, PETRI_PLACES=103, PETRI_TRANSITIONS=112} [2024-11-12 16:33:28,321 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 65 predicate places. [2024-11-12 16:33:28,321 INFO L471 AbstractCegarLoop]: Abstraction has has 103 places, 112 transitions, 1569 flow [2024-11-12 16:33:28,322 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.666666666666668) internal successors, (150), 9 states have internal predecessors, (150), 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) [2024-11-12 16:33:28,322 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:33:28,322 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:33:28,338 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-12 16:33:28,526 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:33:28,526 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-12 16:33:28,527 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:33:28,527 INFO L85 PathProgramCache]: Analyzing trace with hash -294830434, now seen corresponding path program 1 times [2024-11-12 16:33:28,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:33:28,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745290643] [2024-11-12 16:33:28,527 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:33:28,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:33:28,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:33:28,605 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 16:33:28,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:33:28,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745290643] [2024-11-12 16:33:28,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745290643] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:33:28,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:33:28,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-12 16:33:28,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874024136] [2024-11-12 16:33:28,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:33:28,606 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 16:33:28,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:33:28,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 16:33:28,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-12 16:33:28,607 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2024-11-12 16:33:28,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 112 transitions, 1569 flow. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 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) [2024-11-12 16:33:28,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:33:28,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2024-11-12 16:33:28,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:33:28,816 INFO L124 PetriNetUnfolderBase]: 671/1177 cut-off events. [2024-11-12 16:33:28,817 INFO L125 PetriNetUnfolderBase]: For 11511/11511 co-relation queries the response was YES. [2024-11-12 16:33:28,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7032 conditions, 1177 events. 671/1177 cut-off events. For 11511/11511 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 5500 event pairs, 242 based on Foata normal form. 18/1195 useless extension candidates. Maximal degree in co-relation 5601. Up to 864 conditions per place. [2024-11-12 16:33:28,829 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 101 selfloop transitions, 21 changer transitions 8/131 dead transitions. [2024-11-12 16:33:28,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 131 transitions, 1941 flow [2024-11-12 16:33:28,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 16:33:28,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-12 16:33:28,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 112 transitions. [2024-11-12 16:33:28,830 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6054054054054054 [2024-11-12 16:33:28,830 INFO L175 Difference]: Start difference. First operand has 103 places, 112 transitions, 1569 flow. Second operand 5 states and 112 transitions. [2024-11-12 16:33:28,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 131 transitions, 1941 flow [2024-11-12 16:33:28,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 131 transitions, 1802 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-11-12 16:33:28,864 INFO L231 Difference]: Finished difference. Result has 103 places, 112 transitions, 1507 flow [2024-11-12 16:33:28,864 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1434, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1507, PETRI_PLACES=103, PETRI_TRANSITIONS=112} [2024-11-12 16:33:28,865 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 65 predicate places. [2024-11-12 16:33:28,865 INFO L471 AbstractCegarLoop]: Abstraction has has 103 places, 112 transitions, 1507 flow [2024-11-12 16:33:28,865 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 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) [2024-11-12 16:33:28,865 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:33:28,865 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:33:28,865 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-11-12 16:33:28,865 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-12 16:33:28,866 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:33:28,866 INFO L85 PathProgramCache]: Analyzing trace with hash 830763632, now seen corresponding path program 1 times [2024-11-12 16:33:28,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:33:28,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320090885] [2024-11-12 16:33:28,866 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:33:28,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:33:28,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:33:29,210 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 16:33:29,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:33:29,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320090885] [2024-11-12 16:33:29,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320090885] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:33:29,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614285233] [2024-11-12 16:33:29,211 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:33:29,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:33:29,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:33:29,213 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:33:29,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-12 16:33:29,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:33:29,289 INFO L256 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-12 16:33:29,291 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:33:29,322 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 [2024-11-12 16:33:29,434 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 [2024-11-12 16:33:29,452 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:33:29,452 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:33:29,684 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 33 treesize of output 29 [2024-11-12 16:33:29,700 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-12 16:33:29,700 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 41 [2024-11-12 16:33:29,758 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:33:29,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614285233] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:33:29,758 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:33:29,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 22 [2024-11-12 16:33:29,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630752771] [2024-11-12 16:33:29,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:33:29,759 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-12 16:33:29,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:33:29,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-12 16:33:29,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2024-11-12 16:33:30,402 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2024-11-12 16:33:30,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 112 transitions, 1507 flow. Second operand has 22 states, 22 states have (on average 16.727272727272727) internal successors, (368), 22 states have internal predecessors, (368), 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) [2024-11-12 16:33:30,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:33:30,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2024-11-12 16:33:30,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:33:33,775 INFO L124 PetriNetUnfolderBase]: 1291/2253 cut-off events. [2024-11-12 16:33:33,776 INFO L125 PetriNetUnfolderBase]: For 17482/17482 co-relation queries the response was YES. [2024-11-12 16:33:33,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12600 conditions, 2253 events. 1291/2253 cut-off events. For 17482/17482 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 11767 event pairs, 109 based on Foata normal form. 9/2262 useless extension candidates. Maximal degree in co-relation 11601. Up to 551 conditions per place. [2024-11-12 16:33:33,798 INFO L140 encePairwiseOnDemand]: 22/37 looper letters, 144 selfloop transitions, 77 changer transitions 197/419 dead transitions. [2024-11-12 16:33:33,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 419 transitions, 5000 flow [2024-11-12 16:33:33,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-11-12 16:33:33,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2024-11-12 16:33:33,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 935 transitions. [2024-11-12 16:33:33,804 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5493537015276145 [2024-11-12 16:33:33,804 INFO L175 Difference]: Start difference. First operand has 103 places, 112 transitions, 1507 flow. Second operand 46 states and 935 transitions. [2024-11-12 16:33:33,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 419 transitions, 5000 flow [2024-11-12 16:33:33,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 419 transitions, 4932 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-11-12 16:33:33,864 INFO L231 Difference]: Finished difference. Result has 163 places, 121 transitions, 1607 flow [2024-11-12 16:33:33,865 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1457, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=1607, PETRI_PLACES=163, PETRI_TRANSITIONS=121} [2024-11-12 16:33:33,865 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 125 predicate places. [2024-11-12 16:33:33,866 INFO L471 AbstractCegarLoop]: Abstraction has has 163 places, 121 transitions, 1607 flow [2024-11-12 16:33:33,866 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 16.727272727272727) internal successors, (368), 22 states have internal predecessors, (368), 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) [2024-11-12 16:33:33,866 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:33:33,866 INFO L206 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] [2024-11-12 16:33:33,883 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-12 16:33:34,070 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-12 16:33:34,071 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-12 16:33:34,071 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:33:34,072 INFO L85 PathProgramCache]: Analyzing trace with hash -766564343, now seen corresponding path program 2 times [2024-11-12 16:33:34,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:33:34,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696154911] [2024-11-12 16:33:34,072 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:33:34,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:33:34,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:33:34,451 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-12 16:33:34,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:33:34,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696154911] [2024-11-12 16:33:34,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696154911] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:33:34,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468353876] [2024-11-12 16:33:34,452 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-12 16:33:34,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:33:34,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:33:34,454 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:33:34,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-12 16:33:34,536 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-12 16:33:34,537 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 16:33:34,538 INFO L256 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-12 16:33:34,540 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:33:34,632 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 [2024-11-12 16:33:34,889 INFO L349 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2024-11-12 16:33:34,889 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 67 treesize of output 40 [2024-11-12 16:33:34,925 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:33:34,925 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:33:35,328 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 170 treesize of output 150 [2024-11-12 16:33:35,413 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-12 16:33:35,414 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 9 new quantified variables, introduced 15 case distinctions, treesize of input 582 treesize of output 486 [2024-11-12 16:34:07,766 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:34:07,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468353876] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:34:07,767 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:34:07,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 29 [2024-11-12 16:34:07,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398579980] [2024-11-12 16:34:07,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:34:07,767 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-12 16:34:07,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:34:07,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-12 16:34:07,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=705, Unknown=0, NotChecked=0, Total=812 [2024-11-12 16:34:08,622 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2024-11-12 16:34:08,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 121 transitions, 1607 flow. Second operand has 29 states, 29 states have (on average 16.310344827586206) internal successors, (473), 29 states have internal predecessors, (473), 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) [2024-11-12 16:34:08,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:34:08,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2024-11-12 16:34:08,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:34:13,112 INFO L124 PetriNetUnfolderBase]: 1723/3028 cut-off events. [2024-11-12 16:34:13,112 INFO L125 PetriNetUnfolderBase]: For 37607/37607 co-relation queries the response was YES. [2024-11-12 16:34:13,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20627 conditions, 3028 events. 1723/3028 cut-off events. For 37607/37607 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 16977 event pairs, 59 based on Foata normal form. 8/3036 useless extension candidates. Maximal degree in co-relation 20569. Up to 748 conditions per place. [2024-11-12 16:34:13,154 INFO L140 encePairwiseOnDemand]: 22/37 looper letters, 301 selfloop transitions, 214 changer transitions 2/518 dead transitions. [2024-11-12 16:34:13,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 518 transitions, 7029 flow [2024-11-12 16:34:13,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2024-11-12 16:34:13,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2024-11-12 16:34:13,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 1109 transitions. [2024-11-12 16:34:13,157 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.555055055055055 [2024-11-12 16:34:13,157 INFO L175 Difference]: Start difference. First operand has 163 places, 121 transitions, 1607 flow. Second operand 54 states and 1109 transitions. [2024-11-12 16:34:13,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 518 transitions, 7029 flow [2024-11-12 16:34:13,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 518 transitions, 6020 flow, removed 464 selfloop flow, removed 25 redundant places. [2024-11-12 16:34:13,335 INFO L231 Difference]: Finished difference. Result has 173 places, 278 transitions, 3702 flow [2024-11-12 16:34:13,336 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1342, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=3702, PETRI_PLACES=173, PETRI_TRANSITIONS=278} [2024-11-12 16:34:13,336 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 135 predicate places. [2024-11-12 16:34:13,336 INFO L471 AbstractCegarLoop]: Abstraction has has 173 places, 278 transitions, 3702 flow [2024-11-12 16:34:13,337 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 16.310344827586206) internal successors, (473), 29 states have internal predecessors, (473), 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) [2024-11-12 16:34:13,337 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:34:13,337 INFO L206 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] [2024-11-12 16:34:13,360 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-12 16:34:13,537 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-12 16:34:13,538 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-12 16:34:13,538 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:34:13,538 INFO L85 PathProgramCache]: Analyzing trace with hash 2097104287, now seen corresponding path program 3 times [2024-11-12 16:34:13,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:34:13,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35942399] [2024-11-12 16:34:13,538 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:34:13,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:34:13,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:34:13,976 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-12 16:34:13,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:34:13,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35942399] [2024-11-12 16:34:13,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35942399] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:34:13,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917352990] [2024-11-12 16:34:13,977 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-12 16:34:13,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:34:13,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:34:13,980 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:34:13,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-12 16:34:14,070 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-11-12 16:34:14,070 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 16:34:14,071 INFO L256 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-12 16:34:14,072 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:34:14,142 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-12 16:34:14,142 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-12 16:34:14,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917352990] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:34:14,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-12 16:34:14,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 11 [2024-11-12 16:34:14,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005758879] [2024-11-12 16:34:14,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:34:14,143 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-12 16:34:14,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:34:14,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-12 16:34:14,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-11-12 16:34:14,144 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2024-11-12 16:34:14,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 278 transitions, 3702 flow. Second operand has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 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) [2024-11-12 16:34:14,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:34:14,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2024-11-12 16:34:14,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:34:14,526 INFO L124 PetriNetUnfolderBase]: 1523/2637 cut-off events. [2024-11-12 16:34:14,526 INFO L125 PetriNetUnfolderBase]: For 24590/24590 co-relation queries the response was YES. [2024-11-12 16:34:14,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17029 conditions, 2637 events. 1523/2637 cut-off events. For 24590/24590 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 14070 event pairs, 612 based on Foata normal form. 78/2715 useless extension candidates. Maximal degree in co-relation 16980. Up to 2027 conditions per place. [2024-11-12 16:34:14,550 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 199 selfloop transitions, 57 changer transitions 0/257 dead transitions. [2024-11-12 16:34:14,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 257 transitions, 3841 flow [2024-11-12 16:34:14,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-12 16:34:14,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-12 16:34:14,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 138 transitions. [2024-11-12 16:34:14,551 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6216216216216216 [2024-11-12 16:34:14,551 INFO L175 Difference]: Start difference. First operand has 173 places, 278 transitions, 3702 flow. Second operand 6 states and 138 transitions. [2024-11-12 16:34:14,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 257 transitions, 3841 flow [2024-11-12 16:34:14,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 257 transitions, 3333 flow, removed 153 selfloop flow, removed 27 redundant places. [2024-11-12 16:34:14,625 INFO L231 Difference]: Finished difference. Result has 135 places, 236 transitions, 2783 flow [2024-11-12 16:34:14,626 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=2669, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2783, PETRI_PLACES=135, PETRI_TRANSITIONS=236} [2024-11-12 16:34:14,626 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 97 predicate places. [2024-11-12 16:34:14,626 INFO L471 AbstractCegarLoop]: Abstraction has has 135 places, 236 transitions, 2783 flow [2024-11-12 16:34:14,627 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 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) [2024-11-12 16:34:14,627 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:34:14,627 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:34:14,643 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-12 16:34:14,827 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:34:14,828 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-12 16:34:14,828 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:34:14,828 INFO L85 PathProgramCache]: Analyzing trace with hash 34230955, now seen corresponding path program 4 times [2024-11-12 16:34:14,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:34:14,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037383981] [2024-11-12 16:34:14,828 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:34:14,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:34:14,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:34:15,033 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-12 16:34:15,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:34:15,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037383981] [2024-11-12 16:34:15,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037383981] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:34:15,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075864897] [2024-11-12 16:34:15,034 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-12 16:34:15,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:34:15,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:34:15,035 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:34:15,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-12 16:34:15,176 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-12 16:34:15,176 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 16:34:15,178 INFO L256 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-12 16:34:15,179 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:34:15,274 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-12 16:34:15,274 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:34:15,391 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-12 16:34:15,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075864897] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:34:15,391 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:34:15,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-11-12 16:34:15,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617230387] [2024-11-12 16:34:15,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:34:15,392 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-12 16:34:15,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:34:15,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-12 16:34:15,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2024-11-12 16:34:15,393 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2024-11-12 16:34:15,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 236 transitions, 2783 flow. Second operand has 15 states, 15 states have (on average 16.666666666666668) internal successors, (250), 15 states have internal predecessors, (250), 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) [2024-11-12 16:34:15,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:34:15,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2024-11-12 16:34:15,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:34:17,260 INFO L124 PetriNetUnfolderBase]: 2129/3658 cut-off events. [2024-11-12 16:34:17,260 INFO L125 PetriNetUnfolderBase]: For 32042/32042 co-relation queries the response was YES. [2024-11-12 16:34:17,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21507 conditions, 3658 events. 2129/3658 cut-off events. For 32042/32042 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 19183 event pairs, 235 based on Foata normal form. 266/3924 useless extension candidates. Maximal degree in co-relation 21470. Up to 1141 conditions per place. [2024-11-12 16:34:17,285 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 375 selfloop transitions, 119 changer transitions 0/495 dead transitions. [2024-11-12 16:34:17,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 495 transitions, 6550 flow [2024-11-12 16:34:17,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-12 16:34:17,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-12 16:34:17,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 289 transitions. [2024-11-12 16:34:17,288 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6509009009009009 [2024-11-12 16:34:17,288 INFO L175 Difference]: Start difference. First operand has 135 places, 236 transitions, 2783 flow. Second operand 12 states and 289 transitions. [2024-11-12 16:34:17,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 495 transitions, 6550 flow [2024-11-12 16:34:17,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 495 transitions, 6408 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-11-12 16:34:17,354 INFO L231 Difference]: Finished difference. Result has 146 places, 269 transitions, 3405 flow [2024-11-12 16:34:17,354 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=2608, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3405, PETRI_PLACES=146, PETRI_TRANSITIONS=269} [2024-11-12 16:34:17,355 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 108 predicate places. [2024-11-12 16:34:17,355 INFO L471 AbstractCegarLoop]: Abstraction has has 146 places, 269 transitions, 3405 flow [2024-11-12 16:34:17,355 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 16.666666666666668) internal successors, (250), 15 states have internal predecessors, (250), 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) [2024-11-12 16:34:17,355 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:34:17,355 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:34:17,373 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-12 16:34:17,556 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:34:17,556 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-12 16:34:17,556 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:34:17,557 INFO L85 PathProgramCache]: Analyzing trace with hash 331788695, now seen corresponding path program 5 times [2024-11-12 16:34:17,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:34:17,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927128850] [2024-11-12 16:34:17,557 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:34:17,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:34:17,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:34:18,846 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:34:18,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:34:18,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927128850] [2024-11-12 16:34:18,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927128850] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:34:18,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885711699] [2024-11-12 16:34:18,847 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-12 16:34:18,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:34:18,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:34:18,848 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:34:18,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-12 16:34:18,928 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-12 16:34:18,928 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 16:34:18,934 INFO L256 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-12 16:34:18,936 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:34:19,208 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-12 16:34:19,208 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 41 [2024-11-12 16:34:19,215 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 16:34:19,215 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:34:19,505 INFO L349 Elim1Store]: treesize reduction 15, result has 90.2 percent of original size [2024-11-12 16:34:19,505 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 51 treesize of output 173 [2024-11-12 16:34:19,747 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-12 16:34:19,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885711699] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:34:19,747 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:34:19,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 30 [2024-11-12 16:34:19,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638608014] [2024-11-12 16:34:19,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:34:19,748 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-12 16:34:19,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:34:19,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-12 16:34:19,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=810, Unknown=0, NotChecked=0, Total=930 [2024-11-12 16:34:20,573 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2024-11-12 16:34:20,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 269 transitions, 3405 flow. Second operand has 31 states, 31 states have (on average 16.29032258064516) internal successors, (505), 31 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:34:20,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:34:20,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2024-11-12 16:34:20,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:34:22,035 INFO L124 PetriNetUnfolderBase]: 2970/5122 cut-off events. [2024-11-12 16:34:22,035 INFO L125 PetriNetUnfolderBase]: For 49628/49628 co-relation queries the response was YES. [2024-11-12 16:34:22,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32906 conditions, 5122 events. 2970/5122 cut-off events. For 49628/49628 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 28265 event pairs, 400 based on Foata normal form. 2/5124 useless extension candidates. Maximal degree in co-relation 32864. Up to 2703 conditions per place. [2024-11-12 16:34:22,077 INFO L140 encePairwiseOnDemand]: 27/37 looper letters, 307 selfloop transitions, 213 changer transitions 1/522 dead transitions. [2024-11-12 16:34:22,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 522 transitions, 7381 flow [2024-11-12 16:34:22,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-12 16:34:22,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-11-12 16:34:22,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 565 transitions. [2024-11-12 16:34:22,079 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5655655655655656 [2024-11-12 16:34:22,079 INFO L175 Difference]: Start difference. First operand has 146 places, 269 transitions, 3405 flow. Second operand 27 states and 565 transitions. [2024-11-12 16:34:22,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 522 transitions, 7381 flow [2024-11-12 16:34:22,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 522 transitions, 7082 flow, removed 95 selfloop flow, removed 5 redundant places. [2024-11-12 16:34:22,210 INFO L231 Difference]: Finished difference. Result has 175 places, 382 transitions, 5447 flow [2024-11-12 16:34:22,210 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=3252, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=5447, PETRI_PLACES=175, PETRI_TRANSITIONS=382} [2024-11-12 16:34:22,210 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 137 predicate places. [2024-11-12 16:34:22,210 INFO L471 AbstractCegarLoop]: Abstraction has has 175 places, 382 transitions, 5447 flow [2024-11-12 16:34:22,211 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 16.29032258064516) internal successors, (505), 31 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:34:22,211 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:34:22,211 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:34:22,223 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-12 16:34:22,411 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-11-12 16:34:22,411 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-12 16:34:22,412 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:34:22,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1818946973, now seen corresponding path program 6 times [2024-11-12 16:34:22,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:34:22,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088747421] [2024-11-12 16:34:22,412 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:34:22,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:34:22,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:34:23,860 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:34:23,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:34:23,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088747421] [2024-11-12 16:34:23,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088747421] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:34:23,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158396654] [2024-11-12 16:34:23,861 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-12 16:34:23,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:34:23,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:34:23,863 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:34:23,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-12 16:34:23,988 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-12 16:34:23,988 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 16:34:23,995 INFO L256 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-11-12 16:34:23,997 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:34:24,058 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 [2024-11-12 16:34:24,437 INFO L349 Elim1Store]: treesize reduction 38, result has 28.3 percent of original size [2024-11-12 16:34:24,437 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 69 treesize of output 43 [2024-11-12 16:34:24,479 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:34:24,480 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:34:25,368 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 241 treesize of output 213 [2024-11-12 16:34:25,592 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-12 16:34:25,593 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 28 case distinctions, treesize of input 689 treesize of output 703