./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 c7c6ca5d Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/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-?-c7c6ca5-m [2024-11-09 10:57:12,984 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 10:57:13,027 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-09 10:57:13,030 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 10:57:13,031 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 10:57:13,047 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 10:57:13,048 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 10:57:13,048 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 10:57:13,049 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-09 10:57:13,049 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-09 10:57:13,049 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 10:57:13,049 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 10:57:13,050 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-09 10:57:13,050 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-09 10:57:13,050 INFO L153 SettingsManager]: * Use SBE=true [2024-11-09 10:57:13,051 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 10:57:13,051 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 10:57:13,051 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 10:57:13,052 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 10:57:13,052 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 10:57:13,052 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-09 10:57:13,058 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-09 10:57:13,059 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-09 10:57:13,059 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 10:57:13,059 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-09 10:57:13,059 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 10:57:13,060 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-09 10:57:13,060 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 10:57:13,060 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 10:57:13,060 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 10:57:13,061 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-09 10:57:13,061 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 10:57:13,061 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 10:57:13,061 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 10:57:13,061 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 10:57:13,062 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 10:57:13,062 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-09 10:57:13,062 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 10:57:13,063 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 10:57:13,063 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-09 10:57:13,063 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-09 10:57:13,068 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 10:57:13,068 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a4cca88acec68e5dbb90cd5700ef248bb5273dc097847f9475a683bfbdc7b189 [2024-11-09 10:57:13,301 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 10:57:13,317 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 10:57:13,319 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 10:57:13,320 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 10:57:13,321 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 10:57:13,322 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/unroll-3.wvr.c [2024-11-09 10:57:14,854 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 10:57:15,023 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 10:57:15,024 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/unroll-3.wvr.c [2024-11-09 10:57:15,031 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f0a5c7eb1/3022533e154c4dd1952d2bd8f9ef1ca3/FLAGf9056d4cd [2024-11-09 10:57:15,418 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f0a5c7eb1/3022533e154c4dd1952d2bd8f9ef1ca3 [2024-11-09 10:57:15,421 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 10:57:15,423 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 10:57:15,426 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 10:57:15,426 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 10:57:15,431 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 10:57:15,432 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:57:15" (1/1) ... [2024-11-09 10:57:15,435 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3bca5022 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:57:15, skipping insertion in model container [2024-11-09 10:57:15,435 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:57:15" (1/1) ... [2024-11-09 10:57:15,477 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 10:57:15,740 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-09 10:57:15,745 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 10:57:15,754 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 10:57:15,783 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 10:57:15,799 INFO L204 MainTranslator]: Completed translation [2024-11-09 10:57:15,800 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:57:15 WrapperNode [2024-11-09 10:57:15,800 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 10:57:15,801 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 10:57:15,801 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 10:57:15,801 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 10:57:15,807 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:57:15" (1/1) ... [2024-11-09 10:57:15,817 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:57:15" (1/1) ... [2024-11-09 10:57:15,850 INFO L138 Inliner]: procedures = 23, calls = 25, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 139 [2024-11-09 10:57:15,850 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 10:57:15,851 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 10:57:15,851 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 10:57:15,851 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 10:57:15,862 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:57:15" (1/1) ... [2024-11-09 10:57:15,863 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:57:15" (1/1) ... [2024-11-09 10:57:15,869 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:57:15" (1/1) ... [2024-11-09 10:57:15,884 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]. [2024-11-09 10:57:15,884 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:57:15" (1/1) ... [2024-11-09 10:57:15,885 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:57:15" (1/1) ... [2024-11-09 10:57:15,890 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:57:15" (1/1) ... [2024-11-09 10:57:15,893 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:57:15" (1/1) ... [2024-11-09 10:57:15,895 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:57:15" (1/1) ... [2024-11-09 10:57:15,895 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:57:15" (1/1) ... [2024-11-09 10:57:15,897 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 10:57:15,901 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 10:57:15,901 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 10:57:15,901 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 10:57:15,902 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:57:15" (1/1) ... [2024-11-09 10:57:15,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 10:57:15,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:57:15,962 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-09 10:57:15,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-09 10:57:16,048 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 10:57:16,048 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-09 10:57:16,048 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-09 10:57:16,048 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-09 10:57:16,049 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-09 10:57:16,049 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-09 10:57:16,049 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-09 10:57:16,049 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-09 10:57:16,053 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-09 10:57:16,054 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-09 10:57:16,054 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 10:57:16,054 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 10:57:16,054 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-09 10:57:16,054 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-09 10:57:16,057 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-09 10:57:16,178 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 10:57:16,180 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 10:57:16,422 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-09 10:57:16,423 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 10:57:16,621 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 10:57:16,621 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-09 10:57:16,621 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:57:16 BoogieIcfgContainer [2024-11-09 10:57:16,621 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 10:57:16,626 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 10:57:16,626 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 10:57:16,629 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 10:57:16,629 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 10:57:15" (1/3) ... [2024-11-09 10:57:16,630 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4601cbed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:57:16, skipping insertion in model container [2024-11-09 10:57:16,630 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:57:15" (2/3) ... [2024-11-09 10:57:16,631 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4601cbed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:57:16, skipping insertion in model container [2024-11-09 10:57:16,631 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:57:16" (3/3) ... [2024-11-09 10:57:16,632 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-3.wvr.c [2024-11-09 10:57:16,646 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 10:57:16,646 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 12 error locations. [2024-11-09 10:57:16,646 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-09 10:57:16,717 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-09 10:57:16,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 41 places, 37 transitions, 88 flow [2024-11-09 10:57:16,779 INFO L124 PetriNetUnfolderBase]: 3/35 cut-off events. [2024-11-09 10:57:16,780 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-09 10:57:16,782 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. [2024-11-09 10:57:16,783 INFO L82 GeneralOperation]: Start removeDead. Operand has 41 places, 37 transitions, 88 flow [2024-11-09 10:57:16,785 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 38 places, 34 transitions, 80 flow [2024-11-09 10:57:16,792 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 10:57:16,798 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;@4e016469, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 10:57:16,799 INFO L334 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2024-11-09 10:57:16,802 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-09 10:57:16,806 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-09 10:57:16,806 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-09 10:57:16,806 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:57:16,807 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-09 10:57:16,807 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-09 10:57:16,812 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:57:16,813 INFO L85 PathProgramCache]: Analyzing trace with hash 478632, now seen corresponding path program 1 times [2024-11-09 10:57:16,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:57:16,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107979209] [2024-11-09 10:57:16,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:57:16,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:57:16,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:57:17,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:57:17,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:57:17,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107979209] [2024-11-09 10:57:17,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107979209] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:57:17,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:57:17,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-09 10:57:17,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714595227] [2024-11-09 10:57:17,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:57:17,035 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 10:57:17,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:57:17,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 10:57:17,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 10:57:17,082 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 37 [2024-11-09 10:57:17,085 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) [2024-11-09 10:57:17,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:57:17,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 37 [2024-11-09 10:57:17,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:57:17,272 INFO L124 PetriNetUnfolderBase]: 88/211 cut-off events. [2024-11-09 10:57:17,273 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2024-11-09 10:57:17,275 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. [2024-11-09 10:57:17,280 INFO L140 encePairwiseOnDemand]: 33/37 looper letters, 19 selfloop transitions, 2 changer transitions 0/31 dead transitions. [2024-11-09 10:57:17,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 31 transitions, 116 flow [2024-11-09 10:57:17,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 10:57:17,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-09 10:57:17,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 62 transitions. [2024-11-09 10:57:17,292 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5585585585585585 [2024-11-09 10:57:17,294 INFO L175 Difference]: Start difference. First operand has 38 places, 34 transitions, 80 flow. Second operand 3 states and 62 transitions. [2024-11-09 10:57:17,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 31 transitions, 116 flow [2024-11-09 10:57:17,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 31 transitions, 108 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-09 10:57:17,298 INFO L231 Difference]: Finished difference. Result has 33 places, 31 transitions, 70 flow [2024-11-09 10:57:17,300 INFO L260 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} [2024-11-09 10:57:17,307 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, -5 predicate places. [2024-11-09 10:57:17,308 INFO L471 AbstractCegarLoop]: Abstraction has has 33 places, 31 transitions, 70 flow [2024-11-09 10:57:17,308 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) [2024-11-09 10:57:17,308 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:57:17,308 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-09 10:57:17,308 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 10:57:17,308 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-09 10:57:17,309 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:57:17,313 INFO L85 PathProgramCache]: Analyzing trace with hash 478633, now seen corresponding path program 1 times [2024-11-09 10:57:17,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:57:17,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029494154] [2024-11-09 10:57:17,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:57:17,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:57:17,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:57:17,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:57:17,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:57:17,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029494154] [2024-11-09 10:57:17,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029494154] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:57:17,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:57:17,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 10:57:17,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204489105] [2024-11-09 10:57:17,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:57:17,544 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:57:17,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:57:17,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:57:17,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-09 10:57:17,563 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 37 [2024-11-09 10:57:17,563 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) [2024-11-09 10:57:17,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:57:17,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 37 [2024-11-09 10:57:17,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:57:17,641 INFO L124 PetriNetUnfolderBase]: 89/214 cut-off events. [2024-11-09 10:57:17,641 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-09 10:57:17,642 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. [2024-11-09 10:57:17,643 INFO L140 encePairwiseOnDemand]: 33/37 looper letters, 22 selfloop transitions, 3 changer transitions 0/34 dead transitions. [2024-11-09 10:57:17,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 34 transitions, 128 flow [2024-11-09 10:57:17,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 10:57:17,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-09 10:57:17,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 65 transitions. [2024-11-09 10:57:17,645 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5855855855855856 [2024-11-09 10:57:17,645 INFO L175 Difference]: Start difference. First operand has 33 places, 31 transitions, 70 flow. Second operand 3 states and 65 transitions. [2024-11-09 10:57:17,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 34 transitions, 128 flow [2024-11-09 10:57:17,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 34 transitions, 122 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:57:17,647 INFO L231 Difference]: Finished difference. Result has 34 places, 33 transitions, 85 flow [2024-11-09 10:57:17,647 INFO L260 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} [2024-11-09 10:57:17,648 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, -4 predicate places. [2024-11-09 10:57:17,648 INFO L471 AbstractCegarLoop]: Abstraction has has 34 places, 33 transitions, 85 flow [2024-11-09 10:57:17,649 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) [2024-11-09 10:57:17,649 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:57:17,649 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-09 10:57:17,649 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 10:57:17,649 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-09 10:57:17,650 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:57:17,650 INFO L85 PathProgramCache]: Analyzing trace with hash 459981744, now seen corresponding path program 1 times [2024-11-09 10:57:17,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:57:17,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354566191] [2024-11-09 10:57:17,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:57:17,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:57:17,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:57:17,985 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:57:17,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:57:17,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354566191] [2024-11-09 10:57:17,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354566191] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:57:17,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547806266] [2024-11-09 10:57:17,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:57:17,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:57:17,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:57:17,991 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:57:17,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 10:57:18,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:57:18,078 INFO L255 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-09 10:57:18,083 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:57:18,156 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 [2024-11-09 10:57:18,356 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:57:18,356 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:57:18,496 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:57:18,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547806266] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:57:18,497 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:57:18,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-09 10:57:18,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686044792] [2024-11-09 10:57:18,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:57:18,498 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-09 10:57:18,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:57:18,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-09 10:57:18,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-11-09 10:57:18,633 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 37 [2024-11-09 10:57:18,634 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) [2024-11-09 10:57:18,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:57:18,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 37 [2024-11-09 10:57:18,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:57:18,886 INFO L124 PetriNetUnfolderBase]: 89/213 cut-off events. [2024-11-09 10:57:18,886 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-09 10:57:18,889 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. [2024-11-09 10:57:18,892 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 18 selfloop transitions, 6 changer transitions 0/33 dead transitions. [2024-11-09 10:57:18,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 33 transitions, 131 flow [2024-11-09 10:57:18,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 10:57:18,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-09 10:57:18,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 90 transitions. [2024-11-09 10:57:18,895 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4864864864864865 [2024-11-09 10:57:18,895 INFO L175 Difference]: Start difference. First operand has 34 places, 33 transitions, 85 flow. Second operand 5 states and 90 transitions. [2024-11-09 10:57:18,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 33 transitions, 131 flow [2024-11-09 10:57:18,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 33 transitions, 128 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-09 10:57:18,898 INFO L231 Difference]: Finished difference. Result has 37 places, 33 transitions, 98 flow [2024-11-09 10:57:18,898 INFO L260 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} [2024-11-09 10:57:18,899 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, -1 predicate places. [2024-11-09 10:57:18,899 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 33 transitions, 98 flow [2024-11-09 10:57:18,901 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) [2024-11-09 10:57:18,901 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:57:18,901 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-09 10:57:18,920 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-09 10:57:19,102 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 [2024-11-09 10:57:19,104 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-09 10:57:19,104 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:57:19,105 INFO L85 PathProgramCache]: Analyzing trace with hash 1376829362, now seen corresponding path program 1 times [2024-11-09 10:57:19,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:57:19,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511262732] [2024-11-09 10:57:19,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:57:19,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:57:19,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:57:19,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:57:19,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:57:19,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511262732] [2024-11-09 10:57:19,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511262732] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:57:19,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:57:19,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 10:57:19,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663469097] [2024-11-09 10:57:19,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:57:19,217 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:57:19,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:57:19,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:57:19,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 10:57:19,252 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 37 [2024-11-09 10:57:19,252 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) [2024-11-09 10:57:19,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:57:19,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 37 [2024-11-09 10:57:19,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:57:19,371 INFO L124 PetriNetUnfolderBase]: 89/186 cut-off events. [2024-11-09 10:57:19,371 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-11-09 10:57:19,372 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. [2024-11-09 10:57:19,377 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 21 selfloop transitions, 3 changer transitions 0/29 dead transitions. [2024-11-09 10:57:19,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 29 transitions, 138 flow [2024-11-09 10:57:19,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:57:19,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:57:19,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 61 transitions. [2024-11-09 10:57:19,379 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.41216216216216217 [2024-11-09 10:57:19,379 INFO L175 Difference]: Start difference. First operand has 37 places, 33 transitions, 98 flow. Second operand 4 states and 61 transitions. [2024-11-09 10:57:19,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 29 transitions, 138 flow [2024-11-09 10:57:19,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 29 transitions, 125 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-11-09 10:57:19,380 INFO L231 Difference]: Finished difference. Result has 33 places, 29 transitions, 83 flow [2024-11-09 10:57:19,381 INFO L260 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} [2024-11-09 10:57:19,385 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, -5 predicate places. [2024-11-09 10:57:19,386 INFO L471 AbstractCegarLoop]: Abstraction has has 33 places, 29 transitions, 83 flow [2024-11-09 10:57:19,386 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) [2024-11-09 10:57:19,386 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:57:19,386 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-09 10:57:19,386 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-09 10:57:19,386 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-09 10:57:19,387 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:57:19,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1376829363, now seen corresponding path program 1 times [2024-11-09 10:57:19,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:57:19,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330220467] [2024-11-09 10:57:19,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:57:19,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:57:19,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:57:19,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:57:19,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:57:19,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330220467] [2024-11-09 10:57:19,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330220467] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:57:19,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:57:19,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 10:57:19,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172670462] [2024-11-09 10:57:19,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:57:19,476 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 10:57:19,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:57:19,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 10:57:19,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 10:57:19,483 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2024-11-09 10:57:19,483 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) [2024-11-09 10:57:19,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:57:19,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2024-11-09 10:57:19,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:57:19,571 INFO L124 PetriNetUnfolderBase]: 88/185 cut-off events. [2024-11-09 10:57:19,574 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-09 10:57:19,575 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. [2024-11-09 10:57:19,576 INFO L140 encePairwiseOnDemand]: 34/37 looper letters, 21 selfloop transitions, 2 changer transitions 0/28 dead transitions. [2024-11-09 10:57:19,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 28 transitions, 124 flow [2024-11-09 10:57:19,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 10:57:19,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-09 10:57:19,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 66 transitions. [2024-11-09 10:57:19,578 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5945945945945946 [2024-11-09 10:57:19,579 INFO L175 Difference]: Start difference. First operand has 33 places, 29 transitions, 83 flow. Second operand 3 states and 66 transitions. [2024-11-09 10:57:19,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 28 transitions, 124 flow [2024-11-09 10:57:19,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 28 transitions, 121 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:57:19,584 INFO L231 Difference]: Finished difference. Result has 33 places, 28 transitions, 79 flow [2024-11-09 10:57:19,584 INFO L260 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} [2024-11-09 10:57:19,584 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, -5 predicate places. [2024-11-09 10:57:19,585 INFO L471 AbstractCegarLoop]: Abstraction has has 33 places, 28 transitions, 79 flow [2024-11-09 10:57:19,585 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) [2024-11-09 10:57:19,585 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:57:19,585 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:57:19,585 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-09 10:57:19,585 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-09 10:57:19,586 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:57:19,586 INFO L85 PathProgramCache]: Analyzing trace with hash -1921730484, now seen corresponding path program 1 times [2024-11-09 10:57:19,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:57:19,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719578179] [2024-11-09 10:57:19,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:57:19,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:57:19,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:57:19,778 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:57:19,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:57:19,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719578179] [2024-11-09 10:57:19,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719578179] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:57:19,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322617663] [2024-11-09 10:57:19,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:57:19,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:57:19,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:57:19,782 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:57:19,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 10:57:19,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:57:19,849 INFO L255 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-09 10:57:19,850 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:57:19,942 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:57:19,945 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:57:20,032 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 [2024-11-09 10:57:20,057 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:57:20,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322617663] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:57:20,058 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:57:20,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-09 10:57:20,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650607816] [2024-11-09 10:57:20,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:57:20,059 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-09 10:57:20,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:57:20,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-09 10:57:20,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-09 10:57:20,214 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 37 [2024-11-09 10:57:20,215 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) [2024-11-09 10:57:20,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:57:20,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 37 [2024-11-09 10:57:20,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:57:20,350 INFO L124 PetriNetUnfolderBase]: 174/334 cut-off events. [2024-11-09 10:57:20,350 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-11-09 10:57:20,351 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. [2024-11-09 10:57:20,352 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 35 selfloop transitions, 4 changer transitions 0/43 dead transitions. [2024-11-09 10:57:20,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 43 transitions, 190 flow [2024-11-09 10:57:20,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 10:57:20,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-09 10:57:20,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 105 transitions. [2024-11-09 10:57:20,353 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5675675675675675 [2024-11-09 10:57:20,353 INFO L175 Difference]: Start difference. First operand has 33 places, 28 transitions, 79 flow. Second operand 5 states and 105 transitions. [2024-11-09 10:57:20,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 43 transitions, 190 flow [2024-11-09 10:57:20,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 43 transitions, 186 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:57:20,355 INFO L231 Difference]: Finished difference. Result has 36 places, 29 transitions, 91 flow [2024-11-09 10:57:20,355 INFO L260 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} [2024-11-09 10:57:20,355 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, -2 predicate places. [2024-11-09 10:57:20,355 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 29 transitions, 91 flow [2024-11-09 10:57:20,356 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) [2024-11-09 10:57:20,356 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:57:20,356 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:57:20,368 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-09 10:57:20,560 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 [2024-11-09 10:57:20,561 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-09 10:57:20,562 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:57:20,562 INFO L85 PathProgramCache]: Analyzing trace with hash 52957712, now seen corresponding path program 1 times [2024-11-09 10:57:20,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:57:20,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574474275] [2024-11-09 10:57:20,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:57:20,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:57:20,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:57:20,678 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:57:20,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:57:20,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574474275] [2024-11-09 10:57:20,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574474275] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:57:20,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348675148] [2024-11-09 10:57:20,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:57:20,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:57:20,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:57:20,682 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:57:20,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 10:57:20,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:57:20,749 INFO L255 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-09 10:57:20,750 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:57:20,876 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:57:20,877 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:57:20,946 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 [2024-11-09 10:57:21,126 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:57:21,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348675148] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:57:21,127 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:57:21,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2024-11-09 10:57:21,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622970300] [2024-11-09 10:57:21,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:57:21,127 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-09 10:57:21,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:57:21,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-09 10:57:21,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2024-11-09 10:57:21,423 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 37 [2024-11-09 10:57:21,424 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) [2024-11-09 10:57:21,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:57:21,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 37 [2024-11-09 10:57:21,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:57:21,765 INFO L124 PetriNetUnfolderBase]: 366/744 cut-off events. [2024-11-09 10:57:21,765 INFO L125 PetriNetUnfolderBase]: For 62/62 co-relation queries the response was YES. [2024-11-09 10:57:21,766 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. [2024-11-09 10:57:21,769 INFO L140 encePairwiseOnDemand]: 29/37 looper letters, 63 selfloop transitions, 11 changer transitions 0/78 dead transitions. [2024-11-09 10:57:21,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 78 transitions, 367 flow [2024-11-09 10:57:21,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-09 10:57:21,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-09 10:57:21,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 177 transitions. [2024-11-09 10:57:21,772 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.597972972972973 [2024-11-09 10:57:21,772 INFO L175 Difference]: Start difference. First operand has 36 places, 29 transitions, 91 flow. Second operand 8 states and 177 transitions. [2024-11-09 10:57:21,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 78 transitions, 367 flow [2024-11-09 10:57:21,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 78 transitions, 358 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-09 10:57:21,774 INFO L231 Difference]: Finished difference. Result has 45 places, 37 transitions, 172 flow [2024-11-09 10:57:21,774 INFO L260 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} [2024-11-09 10:57:21,775 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, 7 predicate places. [2024-11-09 10:57:21,775 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 37 transitions, 172 flow [2024-11-09 10:57:21,776 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) [2024-11-09 10:57:21,778 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:57:21,778 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:57:21,791 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-09 10:57:21,982 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 [2024-11-09 10:57:21,983 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-09 10:57:21,983 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:57:21,984 INFO L85 PathProgramCache]: Analyzing trace with hash 30466660, now seen corresponding path program 1 times [2024-11-09 10:57:21,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:57:21,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582305368] [2024-11-09 10:57:21,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:57:21,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:57:21,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:57:22,230 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:57:22,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:57:22,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582305368] [2024-11-09 10:57:22,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582305368] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:57:22,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729204185] [2024-11-09 10:57:22,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:57:22,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:57:22,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:57:22,234 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:57:22,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 10:57:22,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:57:22,354 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-09 10:57:22,355 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:57:22,485 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:57:22,485 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:57:22,553 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 [2024-11-09 10:57:22,577 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:57:22,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729204185] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:57:22,577 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:57:22,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-09 10:57:22,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290999652] [2024-11-09 10:57:22,577 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:57:22,578 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-09 10:57:22,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:57:22,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-09 10:57:22,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-11-09 10:57:22,686 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 37 [2024-11-09 10:57:22,686 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) [2024-11-09 10:57:22,686 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:57:22,686 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 37 [2024-11-09 10:57:22,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:57:22,908 INFO L124 PetriNetUnfolderBase]: 583/1037 cut-off events. [2024-11-09 10:57:22,908 INFO L125 PetriNetUnfolderBase]: For 615/663 co-relation queries the response was YES. [2024-11-09 10:57:22,910 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. [2024-11-09 10:57:22,916 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 43 selfloop transitions, 6 changer transitions 0/51 dead transitions. [2024-11-09 10:57:22,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 51 transitions, 322 flow [2024-11-09 10:57:22,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 10:57:22,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-09 10:57:22,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 93 transitions. [2024-11-09 10:57:22,918 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5027027027027027 [2024-11-09 10:57:22,918 INFO L175 Difference]: Start difference. First operand has 45 places, 37 transitions, 172 flow. Second operand 5 states and 93 transitions. [2024-11-09 10:57:22,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 51 transitions, 322 flow [2024-11-09 10:57:22,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 51 transitions, 320 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-09 10:57:22,923 INFO L231 Difference]: Finished difference. Result has 49 places, 38 transitions, 194 flow [2024-11-09 10:57:22,923 INFO L260 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} [2024-11-09 10:57:22,923 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, 11 predicate places. [2024-11-09 10:57:22,924 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 38 transitions, 194 flow [2024-11-09 10:57:22,924 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) [2024-11-09 10:57:22,924 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:57:22,924 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:57:22,944 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-09 10:57:23,129 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:57:23,130 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-09 10:57:23,130 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:57:23,131 INFO L85 PathProgramCache]: Analyzing trace with hash 944466959, now seen corresponding path program 1 times [2024-11-09 10:57:23,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:57:23,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779456229] [2024-11-09 10:57:23,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:57:23,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:57:23,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:57:23,279 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:57:23,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:57:23,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779456229] [2024-11-09 10:57:23,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779456229] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:57:23,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833998056] [2024-11-09 10:57:23,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:57:23,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:57:23,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:57:23,284 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:57:23,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 10:57:23,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:57:23,345 INFO L255 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-09 10:57:23,346 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:57:23,456 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:57:23,456 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:57:23,489 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 [2024-11-09 10:57:23,671 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:57:23,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833998056] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:57:23,672 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:57:23,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2024-11-09 10:57:23,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597704841] [2024-11-09 10:57:23,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:57:23,673 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-09 10:57:23,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:57:23,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-09 10:57:23,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2024-11-09 10:57:23,842 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 37 [2024-11-09 10:57:23,842 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) [2024-11-09 10:57:23,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:57:23,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 37 [2024-11-09 10:57:23,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:57:24,198 INFO L124 PetriNetUnfolderBase]: 629/1108 cut-off events. [2024-11-09 10:57:24,199 INFO L125 PetriNetUnfolderBase]: For 780/843 co-relation queries the response was YES. [2024-11-09 10:57:24,201 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. [2024-11-09 10:57:24,207 INFO L140 encePairwiseOnDemand]: 29/37 looper letters, 53 selfloop transitions, 9 changer transitions 0/64 dead transitions. [2024-11-09 10:57:24,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 64 transitions, 410 flow [2024-11-09 10:57:24,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 10:57:24,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-09 10:57:24,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-11-09 10:57:24,209 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5057915057915058 [2024-11-09 10:57:24,209 INFO L175 Difference]: Start difference. First operand has 49 places, 38 transitions, 194 flow. Second operand 7 states and 131 transitions. [2024-11-09 10:57:24,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 64 transitions, 410 flow [2024-11-09 10:57:24,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 64 transitions, 399 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-11-09 10:57:24,213 INFO L231 Difference]: Finished difference. Result has 54 places, 40 transitions, 224 flow [2024-11-09 10:57:24,213 INFO L260 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} [2024-11-09 10:57:24,214 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, 16 predicate places. [2024-11-09 10:57:24,214 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 40 transitions, 224 flow [2024-11-09 10:57:24,214 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) [2024-11-09 10:57:24,215 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:57:24,215 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-09 10:57:24,232 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-09 10:57:24,419 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:57:24,420 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-09 10:57:24,420 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:57:24,420 INFO L85 PathProgramCache]: Analyzing trace with hash -2076436951, now seen corresponding path program 2 times [2024-11-09 10:57:24,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:57:24,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123385965] [2024-11-09 10:57:24,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:57:24,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:57:24,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:57:24,625 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 10:57:24,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:57:24,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123385965] [2024-11-09 10:57:24,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123385965] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:57:24,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074454076] [2024-11-09 10:57:24,626 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 10:57:24,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:57:24,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:57:24,628 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:57:24,630 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 10:57:24,713 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-09 10:57:24,713 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:57:24,716 INFO L255 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-09 10:57:24,718 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:57:24,730 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 [2024-11-09 10:57:24,913 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 10:57:24,914 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:57:25,061 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 10:57:25,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074454076] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:57:25,061 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:57:25,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 10 [2024-11-09 10:57:25,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275450335] [2024-11-09 10:57:25,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:57:25,062 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-09 10:57:25,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:57:25,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-09 10:57:25,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-11-09 10:57:25,289 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 37 [2024-11-09 10:57:25,290 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) [2024-11-09 10:57:25,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:57:25,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 37 [2024-11-09 10:57:25,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:57:25,490 INFO L124 PetriNetUnfolderBase]: 491/943 cut-off events. [2024-11-09 10:57:25,490 INFO L125 PetriNetUnfolderBase]: For 478/478 co-relation queries the response was YES. [2024-11-09 10:57:25,491 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. [2024-11-09 10:57:25,494 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 38 selfloop transitions, 10 changer transitions 0/52 dead transitions. [2024-11-09 10:57:25,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 52 transitions, 372 flow [2024-11-09 10:57:25,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 10:57:25,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-09 10:57:25,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 96 transitions. [2024-11-09 10:57:25,495 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.518918918918919 [2024-11-09 10:57:25,496 INFO L175 Difference]: Start difference. First operand has 54 places, 40 transitions, 224 flow. Second operand 5 states and 96 transitions. [2024-11-09 10:57:25,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 52 transitions, 372 flow [2024-11-09 10:57:25,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 52 transitions, 355 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-11-09 10:57:25,498 INFO L231 Difference]: Finished difference. Result has 53 places, 39 transitions, 224 flow [2024-11-09 10:57:25,498 INFO L260 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} [2024-11-09 10:57:25,499 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, 15 predicate places. [2024-11-09 10:57:25,499 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 39 transitions, 224 flow [2024-11-09 10:57:25,499 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) [2024-11-09 10:57:25,499 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:57:25,499 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:57:25,512 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-09 10:57:25,703 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:57:25,704 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-09 10:57:25,704 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:57:25,704 INFO L85 PathProgramCache]: Analyzing trace with hash -642258154, now seen corresponding path program 2 times [2024-11-09 10:57:25,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:57:25,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208970399] [2024-11-09 10:57:25,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:57:25,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:57:25,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:57:25,863 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 10:57:25,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:57:25,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208970399] [2024-11-09 10:57:25,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208970399] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:57:25,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804377117] [2024-11-09 10:57:25,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 10:57:25,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:57:25,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:57:25,865 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:57:25,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 10:57:25,953 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-09 10:57:25,954 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:57:25,955 INFO L255 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-09 10:57:25,959 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:57:25,976 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 [2024-11-09 10:57:26,386 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:57:26,386 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 10:57:26,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804377117] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:57:26,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 10:57:26,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 7 [2024-11-09 10:57:26,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118295631] [2024-11-09 10:57:26,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:57:26,387 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 10:57:26,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:57:26,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 10:57:26,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-09 10:57:26,501 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 37 [2024-11-09 10:57:26,501 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) [2024-11-09 10:57:26,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:57:26,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 37 [2024-11-09 10:57:26,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:57:26,872 INFO L124 PetriNetUnfolderBase]: 675/1183 cut-off events. [2024-11-09 10:57:26,872 INFO L125 PetriNetUnfolderBase]: For 1437/1437 co-relation queries the response was YES. [2024-11-09 10:57:26,874 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. [2024-11-09 10:57:26,878 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 58 selfloop transitions, 6 changer transitions 0/65 dead transitions. [2024-11-09 10:57:26,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 65 transitions, 485 flow [2024-11-09 10:57:26,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 10:57:26,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-09 10:57:26,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 100 transitions. [2024-11-09 10:57:26,880 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5405405405405406 [2024-11-09 10:57:26,880 INFO L175 Difference]: Start difference. First operand has 53 places, 39 transitions, 224 flow. Second operand 5 states and 100 transitions. [2024-11-09 10:57:26,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 65 transitions, 485 flow [2024-11-09 10:57:26,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 65 transitions, 441 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-09 10:57:26,884 INFO L231 Difference]: Finished difference. Result has 55 places, 41 transitions, 236 flow [2024-11-09 10:57:26,884 INFO L260 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} [2024-11-09 10:57:26,885 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, 17 predicate places. [2024-11-09 10:57:26,885 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 41 transitions, 236 flow [2024-11-09 10:57:26,885 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) [2024-11-09 10:57:26,885 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:57:26,885 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:57:26,902 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-09 10:57:27,089 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:57:27,090 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-09 10:57:27,091 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:57:27,091 INFO L85 PathProgramCache]: Analyzing trace with hash 284917643, now seen corresponding path program 1 times [2024-11-09 10:57:27,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:57:27,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160546025] [2024-11-09 10:57:27,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:57:27,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:57:27,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:57:27,366 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:57:27,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:57:27,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160546025] [2024-11-09 10:57:27,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160546025] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:57:27,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044747222] [2024-11-09 10:57:27,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:57:27,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:57:27,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:57:27,370 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:57:27,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-09 10:57:27,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:57:27,477 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-09 10:57:27,478 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:57:27,712 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:57:27,712 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:57:27,832 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 [2024-11-09 10:57:28,063 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:57:28,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044747222] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:57:28,063 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:57:28,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2024-11-09 10:57:28,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352763523] [2024-11-09 10:57:28,064 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:57:28,064 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-09 10:57:28,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:57:28,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-09 10:57:28,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2024-11-09 10:57:28,299 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 37 [2024-11-09 10:57:28,299 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) [2024-11-09 10:57:28,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:57:28,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 37 [2024-11-09 10:57:28,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:57:28,686 INFO L124 PetriNetUnfolderBase]: 616/1083 cut-off events. [2024-11-09 10:57:28,686 INFO L125 PetriNetUnfolderBase]: For 973/973 co-relation queries the response was YES. [2024-11-09 10:57:28,688 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. [2024-11-09 10:57:28,693 INFO L140 encePairwiseOnDemand]: 26/37 looper letters, 73 selfloop transitions, 13 changer transitions 0/87 dead transitions. [2024-11-09 10:57:28,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 87 transitions, 566 flow [2024-11-09 10:57:28,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 10:57:28,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-09 10:57:28,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-11-09 10:57:28,694 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5345345345345346 [2024-11-09 10:57:28,694 INFO L175 Difference]: Start difference. First operand has 55 places, 41 transitions, 236 flow. Second operand 9 states and 178 transitions. [2024-11-09 10:57:28,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 87 transitions, 566 flow [2024-11-09 10:57:28,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 87 transitions, 552 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-11-09 10:57:28,698 INFO L231 Difference]: Finished difference. Result has 64 places, 45 transitions, 300 flow [2024-11-09 10:57:28,698 INFO L260 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} [2024-11-09 10:57:28,699 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, 26 predicate places. [2024-11-09 10:57:28,699 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 45 transitions, 300 flow [2024-11-09 10:57:28,699 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) [2024-11-09 10:57:28,700 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:57:28,700 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:57:28,720 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-09 10:57:28,903 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 [2024-11-09 10:57:28,904 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-09 10:57:28,904 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:57:28,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1955461207, now seen corresponding path program 1 times [2024-11-09 10:57:28,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:57:28,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273868270] [2024-11-09 10:57:28,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:57:28,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:57:28,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:57:28,952 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:57:28,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:57:28,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273868270] [2024-11-09 10:57:28,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273868270] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:57:28,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:57:28,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 10:57:28,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796647176] [2024-11-09 10:57:28,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:57:28,954 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 10:57:28,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:57:28,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 10:57:28,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 10:57:28,962 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2024-11-09 10:57:28,963 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) [2024-11-09 10:57:28,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:57:28,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2024-11-09 10:57:28,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:57:29,087 INFO L124 PetriNetUnfolderBase]: 547/1010 cut-off events. [2024-11-09 10:57:29,087 INFO L125 PetriNetUnfolderBase]: For 1416/1416 co-relation queries the response was YES. [2024-11-09 10:57:29,090 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. [2024-11-09 10:57:29,094 INFO L140 encePairwiseOnDemand]: 33/37 looper letters, 48 selfloop transitions, 5 changer transitions 1/58 dead transitions. [2024-11-09 10:57:29,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 58 transitions, 453 flow [2024-11-09 10:57:29,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 10:57:29,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-09 10:57:29,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 77 transitions. [2024-11-09 10:57:29,095 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6936936936936937 [2024-11-09 10:57:29,095 INFO L175 Difference]: Start difference. First operand has 64 places, 45 transitions, 300 flow. Second operand 3 states and 77 transitions. [2024-11-09 10:57:29,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 58 transitions, 453 flow [2024-11-09 10:57:29,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 58 transitions, 435 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-11-09 10:57:29,101 INFO L231 Difference]: Finished difference. Result has 62 places, 47 transitions, 315 flow [2024-11-09 10:57:29,101 INFO L260 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} [2024-11-09 10:57:29,102 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, 24 predicate places. [2024-11-09 10:57:29,102 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 47 transitions, 315 flow [2024-11-09 10:57:29,102 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:57:29,102 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:57:29,103 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:57:29,103 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-09 10:57:29,103 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-09 10:57:29,103 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:57:29,103 INFO L85 PathProgramCache]: Analyzing trace with hash 567136036, now seen corresponding path program 2 times [2024-11-09 10:57:29,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:57:29,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70252015] [2024-11-09 10:57:29,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:57:29,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:57:29,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:57:29,309 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 10:57:29,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:57:29,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70252015] [2024-11-09 10:57:29,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70252015] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:57:29,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401208494] [2024-11-09 10:57:29,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 10:57:29,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:57:29,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:57:29,312 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) [2024-11-09 10:57:29,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-09 10:57:29,394 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-09 10:57:29,394 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:57:29,395 INFO L255 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-09 10:57:29,396 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:57:29,404 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 [2024-11-09 10:57:29,560 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 10:57:29,560 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:57:29,716 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 10:57:29,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401208494] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:57:29,716 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:57:29,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 10 [2024-11-09 10:57:29,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952621664] [2024-11-09 10:57:29,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:57:29,717 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-09 10:57:29,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:57:29,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-09 10:57:29,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-11-09 10:57:29,898 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 37 [2024-11-09 10:57:29,899 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) [2024-11-09 10:57:29,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:57:29,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 37 [2024-11-09 10:57:29,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:57:30,137 INFO L124 PetriNetUnfolderBase]: 547/962 cut-off events. [2024-11-09 10:57:30,137 INFO L125 PetriNetUnfolderBase]: For 1463/1463 co-relation queries the response was YES. [2024-11-09 10:57:30,138 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. [2024-11-09 10:57:30,141 INFO L140 encePairwiseOnDemand]: 30/37 looper letters, 44 selfloop transitions, 11 changer transitions 0/56 dead transitions. [2024-11-09 10:57:30,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 56 transitions, 478 flow [2024-11-09 10:57:30,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 10:57:30,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-09 10:57:30,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 85 transitions. [2024-11-09 10:57:30,142 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4594594594594595 [2024-11-09 10:57:30,142 INFO L175 Difference]: Start difference. First operand has 62 places, 47 transitions, 315 flow. Second operand 5 states and 85 transitions. [2024-11-09 10:57:30,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 56 transitions, 478 flow [2024-11-09 10:57:30,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 56 transitions, 471 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-09 10:57:30,146 INFO L231 Difference]: Finished difference. Result has 62 places, 44 transitions, 314 flow [2024-11-09 10:57:30,146 INFO L260 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} [2024-11-09 10:57:30,147 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, 24 predicate places. [2024-11-09 10:57:30,147 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 44 transitions, 314 flow [2024-11-09 10:57:30,147 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) [2024-11-09 10:57:30,147 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:57:30,147 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:57:30,159 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-09 10:57:30,349 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 [2024-11-09 10:57:30,349 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-09 10:57:30,349 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:57:30,349 INFO L85 PathProgramCache]: Analyzing trace with hash -1110633781, now seen corresponding path program 1 times [2024-11-09 10:57:30,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:57:30,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16873069] [2024-11-09 10:57:30,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:57:30,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:57:30,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:57:30,459 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:57:30,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:57:30,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16873069] [2024-11-09 10:57:30,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16873069] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:57:30,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297918275] [2024-11-09 10:57:30,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:57:30,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:57:30,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:57:30,465 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) [2024-11-09 10:57:30,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-09 10:57:30,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:57:30,522 INFO L255 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-09 10:57:30,523 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:57:30,545 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:57:30,545 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:57:30,575 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:57:30,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297918275] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-09 10:57:30,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-09 10:57:30,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 5] total 7 [2024-11-09 10:57:30,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120566325] [2024-11-09 10:57:30,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:57:30,576 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:57:30,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:57:30,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:57:30,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-11-09 10:57:30,576 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2024-11-09 10:57:30,577 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 44 transitions, 314 flow. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:57:30,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:57:30,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2024-11-09 10:57:30,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:57:30,681 INFO L124 PetriNetUnfolderBase]: 573/1006 cut-off events. [2024-11-09 10:57:30,682 INFO L125 PetriNetUnfolderBase]: For 1867/1867 co-relation queries the response was YES. [2024-11-09 10:57:30,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3291 conditions, 1006 events. 573/1006 cut-off events. For 1867/1867 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 4452 event pairs, 94 based on Foata normal form. 18/1024 useless extension candidates. Maximal degree in co-relation 2199. Up to 663 conditions per place. [2024-11-09 10:57:30,686 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 54 selfloop transitions, 13 changer transitions 1/69 dead transitions. [2024-11-09 10:57:30,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 69 transitions, 576 flow [2024-11-09 10:57:30,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:57:30,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:57:30,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 96 transitions. [2024-11-09 10:57:30,687 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6486486486486487 [2024-11-09 10:57:30,687 INFO L175 Difference]: Start difference. First operand has 62 places, 44 transitions, 314 flow. Second operand 4 states and 96 transitions. [2024-11-09 10:57:30,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 69 transitions, 576 flow [2024-11-09 10:57:30,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 69 transitions, 548 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-09 10:57:30,691 INFO L231 Difference]: Finished difference. Result has 64 places, 49 transitions, 386 flow [2024-11-09 10:57:30,691 INFO L260 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=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=386, PETRI_PLACES=64, PETRI_TRANSITIONS=49} [2024-11-09 10:57:30,692 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, 26 predicate places. [2024-11-09 10:57:30,692 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 49 transitions, 386 flow [2024-11-09 10:57:30,692 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:57:30,692 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:57:30,692 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:57:30,705 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-09 10:57:30,892 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,SelfDestructingSolverStorable14 [2024-11-09 10:57:30,893 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-09 10:57:30,893 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:57:30,893 INFO L85 PathProgramCache]: Analyzing trace with hash 666381849, now seen corresponding path program 2 times [2024-11-09 10:57:30,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:57:30,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628948469] [2024-11-09 10:57:30,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:57:30,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:57:30,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:57:30,961 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:57:30,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:57:30,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628948469] [2024-11-09 10:57:30,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628948469] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:57:30,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:57:30,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 10:57:30,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584848300] [2024-11-09 10:57:30,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:57:30,962 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 10:57:30,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:57:30,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 10:57:30,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-09 10:57:30,963 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2024-11-09 10:57:30,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 49 transitions, 386 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) [2024-11-09 10:57:30,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:57:30,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2024-11-09 10:57:30,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:57:31,194 INFO L124 PetriNetUnfolderBase]: 611/1088 cut-off events. [2024-11-09 10:57:31,194 INFO L125 PetriNetUnfolderBase]: For 3239/3239 co-relation queries the response was YES. [2024-11-09 10:57:31,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3966 conditions, 1088 events. 611/1088 cut-off events. For 3239/3239 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 5237 event pairs, 201 based on Foata normal form. 22/1110 useless extension candidates. Maximal degree in co-relation 2743. Up to 603 conditions per place. [2024-11-09 10:57:31,202 INFO L140 encePairwiseOnDemand]: 29/37 looper letters, 81 selfloop transitions, 18 changer transitions 6/106 dead transitions. [2024-11-09 10:57:31,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 106 transitions, 1012 flow [2024-11-09 10:57:31,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 10:57:31,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-09 10:57:31,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-11-09 10:57:31,203 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6531531531531531 [2024-11-09 10:57:31,203 INFO L175 Difference]: Start difference. First operand has 64 places, 49 transitions, 386 flow. Second operand 6 states and 145 transitions. [2024-11-09 10:57:31,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 106 transitions, 1012 flow [2024-11-09 10:57:31,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 106 transitions, 1002 flow, removed 5 selfloop flow, removed 0 redundant places. [2024-11-09 10:57:31,215 INFO L231 Difference]: Finished difference. Result has 73 places, 62 transitions, 595 flow [2024-11-09 10:57:31,218 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=382, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=595, PETRI_PLACES=73, PETRI_TRANSITIONS=62} [2024-11-09 10:57:31,219 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, 35 predicate places. [2024-11-09 10:57:31,219 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 62 transitions, 595 flow [2024-11-09 10:57:31,219 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) [2024-11-09 10:57:31,219 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:57:31,219 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:57:31,219 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-09 10:57:31,219 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-09 10:57:31,219 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:57:31,220 INFO L85 PathProgramCache]: Analyzing trace with hash -140976623, now seen corresponding path program 3 times [2024-11-09 10:57:31,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:57:31,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749163839] [2024-11-09 10:57:31,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:57:31,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:57:31,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:57:31,334 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:57:31,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:57:31,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749163839] [2024-11-09 10:57:31,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749163839] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:57:31,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466695543] [2024-11-09 10:57:31,335 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 10:57:31,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:57:31,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:57:31,337 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) [2024-11-09 10:57:31,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-09 10:57:31,400 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-09 10:57:31,400 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:57:31,401 INFO L255 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-09 10:57:31,404 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:57:31,431 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:57:31,431 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:57:31,469 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:57:31,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466695543] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:57:31,470 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:57:31,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2024-11-09 10:57:31,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975732350] [2024-11-09 10:57:31,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:57:31,471 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-09 10:57:31,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:57:31,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-09 10:57:31,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-11-09 10:57:31,472 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2024-11-09 10:57:31,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 62 transitions, 595 flow. Second operand has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 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) [2024-11-09 10:57:31,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:57:31,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2024-11-09 10:57:31,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:57:31,708 INFO L124 PetriNetUnfolderBase]: 593/1080 cut-off events. [2024-11-09 10:57:31,709 INFO L125 PetriNetUnfolderBase]: For 4054/4054 co-relation queries the response was YES. [2024-11-09 10:57:31,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4486 conditions, 1080 events. 593/1080 cut-off events. For 4054/4054 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 5089 event pairs, 211 based on Foata normal form. 26/1106 useless extension candidates. Maximal degree in co-relation 3082. Up to 643 conditions per place. [2024-11-09 10:57:31,717 INFO L140 encePairwiseOnDemand]: 29/37 looper letters, 74 selfloop transitions, 33 changer transitions 6/114 dead transitions. [2024-11-09 10:57:31,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 114 transitions, 1162 flow [2024-11-09 10:57:31,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-09 10:57:31,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-09 10:57:31,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 176 transitions. [2024-11-09 10:57:31,718 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5945945945945946 [2024-11-09 10:57:31,718 INFO L175 Difference]: Start difference. First operand has 73 places, 62 transitions, 595 flow. Second operand 8 states and 176 transitions. [2024-11-09 10:57:31,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 114 transitions, 1162 flow [2024-11-09 10:57:31,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 114 transitions, 1148 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-09 10:57:31,730 INFO L231 Difference]: Finished difference. Result has 83 places, 75 transitions, 844 flow [2024-11-09 10:57:31,731 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=561, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=844, PETRI_PLACES=83, PETRI_TRANSITIONS=75} [2024-11-09 10:57:31,731 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, 45 predicate places. [2024-11-09 10:57:31,731 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 75 transitions, 844 flow [2024-11-09 10:57:31,731 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 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) [2024-11-09 10:57:31,732 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:57:31,732 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:57:31,754 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-09 10:57:31,932 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-09 10:57:31,932 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-09 10:57:31,933 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:57:31,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1661745421, now seen corresponding path program 4 times [2024-11-09 10:57:31,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:57:31,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121953633] [2024-11-09 10:57:31,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:57:31,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:57:31,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:57:31,997 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:57:31,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:57:31,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121953633] [2024-11-09 10:57:31,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121953633] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:57:31,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:57:31,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 10:57:31,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743508831] [2024-11-09 10:57:31,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:57:31,998 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 10:57:31,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:57:31,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 10:57:31,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-09 10:57:31,998 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2024-11-09 10:57:31,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 75 transitions, 844 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) [2024-11-09 10:57:31,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:57:31,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2024-11-09 10:57:31,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:57:32,187 INFO L124 PetriNetUnfolderBase]: 579/1050 cut-off events. [2024-11-09 10:57:32,188 INFO L125 PetriNetUnfolderBase]: For 5585/5585 co-relation queries the response was YES. [2024-11-09 10:57:32,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5139 conditions, 1050 events. 579/1050 cut-off events. For 5585/5585 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 4889 event pairs, 235 based on Foata normal form. 8/1058 useless extension candidates. Maximal degree in co-relation 3510. Up to 719 conditions per place. [2024-11-09 10:57:32,199 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 66 selfloop transitions, 15 changer transitions 11/93 dead transitions. [2024-11-09 10:57:32,199 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 93 transitions, 1133 flow [2024-11-09 10:57:32,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 10:57:32,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-09 10:57:32,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 111 transitions. [2024-11-09 10:57:32,201 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-11-09 10:57:32,201 INFO L175 Difference]: Start difference. First operand has 83 places, 75 transitions, 844 flow. Second operand 5 states and 111 transitions. [2024-11-09 10:57:32,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 93 transitions, 1133 flow [2024-11-09 10:57:32,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 93 transitions, 1085 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-11-09 10:57:32,216 INFO L231 Difference]: Finished difference. Result has 88 places, 75 transitions, 849 flow [2024-11-09 10:57:32,216 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=796, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=849, PETRI_PLACES=88, PETRI_TRANSITIONS=75} [2024-11-09 10:57:32,216 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, 50 predicate places. [2024-11-09 10:57:32,216 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 75 transitions, 849 flow [2024-11-09 10:57:32,217 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) [2024-11-09 10:57:32,217 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:57:32,217 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:57:32,217 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-09 10:57:32,217 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-09 10:57:32,218 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:57:32,218 INFO L85 PathProgramCache]: Analyzing trace with hash 55023240, now seen corresponding path program 1 times [2024-11-09 10:57:32,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:57:32,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491383990] [2024-11-09 10:57:32,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:57:32,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:57:32,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:57:32,278 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:57:32,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:57:32,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491383990] [2024-11-09 10:57:32,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491383990] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:57:32,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:57:32,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 10:57:32,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594028441] [2024-11-09 10:57:32,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:57:32,279 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:57:32,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:57:32,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:57:32,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-09 10:57:32,281 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2024-11-09 10:57:32,281 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 75 transitions, 849 flow. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:57:32,281 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:57:32,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2024-11-09 10:57:32,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:57:32,445 INFO L124 PetriNetUnfolderBase]: 655/1154 cut-off events. [2024-11-09 10:57:32,445 INFO L125 PetriNetUnfolderBase]: For 6680/6680 co-relation queries the response was YES. [2024-11-09 10:57:32,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5768 conditions, 1154 events. 655/1154 cut-off events. For 6680/6680 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 5384 event pairs, 137 based on Foata normal form. 28/1182 useless extension candidates. Maximal degree in co-relation 5634. Up to 909 conditions per place. [2024-11-09 10:57:32,454 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 84 selfloop transitions, 11 changer transitions 3/99 dead transitions. [2024-11-09 10:57:32,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 99 transitions, 1265 flow [2024-11-09 10:57:32,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:57:32,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:57:32,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 95 transitions. [2024-11-09 10:57:32,455 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6418918918918919 [2024-11-09 10:57:32,455 INFO L175 Difference]: Start difference. First operand has 88 places, 75 transitions, 849 flow. Second operand 4 states and 95 transitions. [2024-11-09 10:57:32,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 99 transitions, 1265 flow [2024-11-09 10:57:32,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 99 transitions, 1219 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-11-09 10:57:32,472 INFO L231 Difference]: Finished difference. Result has 87 places, 80 transitions, 923 flow [2024-11-09 10:57:32,472 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=809, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=923, PETRI_PLACES=87, PETRI_TRANSITIONS=80} [2024-11-09 10:57:32,472 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, 49 predicate places. [2024-11-09 10:57:32,472 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 80 transitions, 923 flow [2024-11-09 10:57:32,473 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:57:32,473 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:57:32,473 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:57:32,473 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-11-09 10:57:32,473 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-09 10:57:32,473 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:57:32,473 INFO L85 PathProgramCache]: Analyzing trace with hash 166664692, now seen corresponding path program 2 times [2024-11-09 10:57:32,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:57:32,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611785880] [2024-11-09 10:57:32,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:57:32,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:57:32,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:57:32,542 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:57:32,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:57:32,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611785880] [2024-11-09 10:57:32,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611785880] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:57:32,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:57:32,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 10:57:32,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465318444] [2024-11-09 10:57:32,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:57:32,542 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:57:32,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:57:32,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:57:32,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-09 10:57:32,543 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2024-11-09 10:57:32,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 80 transitions, 923 flow. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:57:32,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:57:32,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2024-11-09 10:57:32,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:57:32,708 INFO L124 PetriNetUnfolderBase]: 627/1092 cut-off events. [2024-11-09 10:57:32,708 INFO L125 PetriNetUnfolderBase]: For 6808/6808 co-relation queries the response was YES. [2024-11-09 10:57:32,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5586 conditions, 1092 events. 627/1092 cut-off events. For 6808/6808 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 4955 event pairs, 197 based on Foata normal form. 32/1124 useless extension candidates. Maximal degree in co-relation 3800. Up to 627 conditions per place. [2024-11-09 10:57:32,720 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 81 selfloop transitions, 24 changer transitions 3/109 dead transitions. [2024-11-09 10:57:32,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 109 transitions, 1360 flow [2024-11-09 10:57:32,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:57:32,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:57:32,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 101 transitions. [2024-11-09 10:57:32,721 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6824324324324325 [2024-11-09 10:57:32,721 INFO L175 Difference]: Start difference. First operand has 87 places, 80 transitions, 923 flow. Second operand 4 states and 101 transitions. [2024-11-09 10:57:32,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 109 transitions, 1360 flow [2024-11-09 10:57:32,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 109 transitions, 1338 flow, removed 8 selfloop flow, removed 1 redundant places. [2024-11-09 10:57:32,736 INFO L231 Difference]: Finished difference. Result has 90 places, 79 transitions, 957 flow [2024-11-09 10:57:32,736 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=855, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=957, PETRI_PLACES=90, PETRI_TRANSITIONS=79} [2024-11-09 10:57:32,736 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, 52 predicate places. [2024-11-09 10:57:32,736 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 79 transitions, 957 flow [2024-11-09 10:57:32,736 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:57:32,736 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:57:32,736 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:57:32,736 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-11-09 10:57:32,737 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-09 10:57:32,737 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:57:32,737 INFO L85 PathProgramCache]: Analyzing trace with hash 830763632, now seen corresponding path program 1 times [2024-11-09 10:57:32,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:57:32,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710784571] [2024-11-09 10:57:32,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:57:32,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:57:32,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:57:33,012 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:57:33,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:57:33,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710784571] [2024-11-09 10:57:33,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710784571] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:57:33,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619117316] [2024-11-09 10:57:33,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:57:33,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:57:33,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:57:33,014 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) [2024-11-09 10:57:33,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-09 10:57:33,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:57:33,069 INFO L255 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-09 10:57:33,070 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:57:33,095 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 [2024-11-09 10:57:33,194 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 [2024-11-09 10:57:33,209 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:57:33,209 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:57:33,429 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 [2024-11-09 10:57:33,452 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-09 10:57:33,454 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 [2024-11-09 10:57:33,545 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:57:33,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619117316] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:57:33,546 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:57:33,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 22 [2024-11-09 10:57:33,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266801918] [2024-11-09 10:57:33,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:57:33,546 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-09 10:57:33,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:57:33,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-09 10:57:33,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2024-11-09 10:57:34,326 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2024-11-09 10:57:34,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 79 transitions, 957 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) [2024-11-09 10:57:34,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:57:34,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2024-11-09 10:57:34,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:57:37,762 INFO L124 PetriNetUnfolderBase]: 1137/1979 cut-off events. [2024-11-09 10:57:37,762 INFO L125 PetriNetUnfolderBase]: For 12348/12348 co-relation queries the response was YES. [2024-11-09 10:57:37,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10116 conditions, 1979 events. 1137/1979 cut-off events. For 12348/12348 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 9835 event pairs, 101 based on Foata normal form. 9/1988 useless extension candidates. Maximal degree in co-relation 8201. Up to 373 conditions per place. [2024-11-09 10:57:37,771 INFO L140 encePairwiseOnDemand]: 22/37 looper letters, 130 selfloop transitions, 65 changer transitions 167/363 dead transitions. [2024-11-09 10:57:37,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 363 transitions, 3926 flow [2024-11-09 10:57:37,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-11-09 10:57:37,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2024-11-09 10:57:37,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 935 transitions. [2024-11-09 10:57:37,774 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5493537015276145 [2024-11-09 10:57:37,774 INFO L175 Difference]: Start difference. First operand has 90 places, 79 transitions, 957 flow. Second operand 46 states and 935 transitions. [2024-11-09 10:57:37,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 363 transitions, 3926 flow [2024-11-09 10:57:37,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 363 transitions, 3876 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-11-09 10:57:37,794 INFO L231 Difference]: Finished difference. Result has 147 places, 96 transitions, 1160 flow [2024-11-09 10:57:37,794 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=929, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=1160, PETRI_PLACES=147, PETRI_TRANSITIONS=96} [2024-11-09 10:57:37,794 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, 109 predicate places. [2024-11-09 10:57:37,795 INFO L471 AbstractCegarLoop]: Abstraction has has 147 places, 96 transitions, 1160 flow [2024-11-09 10:57:37,795 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) [2024-11-09 10:57:37,795 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:57:37,795 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:57:37,807 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-09 10:57:37,999 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 [2024-11-09 10:57:37,999 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-09 10:57:38,000 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:57:38,000 INFO L85 PathProgramCache]: Analyzing trace with hash -766564343, now seen corresponding path program 2 times [2024-11-09 10:57:38,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:57:38,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847565148] [2024-11-09 10:57:38,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:57:38,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:57:38,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:57:38,303 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:57:38,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:57:38,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847565148] [2024-11-09 10:57:38,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847565148] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:57:38,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091083920] [2024-11-09 10:57:38,304 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 10:57:38,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:57:38,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:57:38,305 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) [2024-11-09 10:57:38,306 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-09 10:57:38,363 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 10:57:38,363 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:57:38,364 INFO L255 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-09 10:57:38,365 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:57:38,400 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 [2024-11-09 10:57:38,434 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 [2024-11-09 10:57:38,637 INFO L349 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2024-11-09 10:57:38,637 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 [2024-11-09 10:57:38,669 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:57:38,669 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:57:39,099 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 250 treesize of output 230 [2024-11-09 10:57:39,313 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 10:57:39,318 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 9886 treesize of output 6582