./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/chl-nzb-file-trans.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 3289d67d Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/chl-nzb-file-trans.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 0d0975dc4466296431d96c26938a2e71864de63aba998f18ecd8a32ca341796b --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-3289d67-m [2024-11-17 03:33:05,216 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-17 03:33:05,283 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-17 03:33:05,287 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-17 03:33:05,288 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-17 03:33:05,338 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-17 03:33:05,339 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-17 03:33:05,339 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-17 03:33:05,340 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-17 03:33:05,341 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-17 03:33:05,342 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-17 03:33:05,342 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-17 03:33:05,343 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-17 03:33:05,345 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-17 03:33:05,345 INFO L153 SettingsManager]: * Use SBE=true [2024-11-17 03:33:05,346 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-17 03:33:05,346 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-17 03:33:05,346 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-17 03:33:05,347 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-17 03:33:05,350 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-17 03:33:05,350 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-17 03:33:05,351 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-17 03:33:05,351 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-17 03:33:05,351 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-17 03:33:05,352 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-17 03:33:05,352 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-17 03:33:05,352 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-17 03:33:05,353 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-17 03:33:05,353 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-17 03:33:05,353 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-17 03:33:05,353 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-17 03:33:05,362 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-17 03:33:05,362 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-17 03:33:05,362 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-17 03:33:05,363 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-17 03:33:05,363 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-17 03:33:05,363 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-17 03:33:05,363 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-17 03:33:05,363 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-17 03:33:05,363 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-17 03:33:05,363 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-17 03:33:05,365 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-17 03:33:05,365 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0d0975dc4466296431d96c26938a2e71864de63aba998f18ecd8a32ca341796b [2024-11-17 03:33:05,627 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-17 03:33:05,655 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-17 03:33:05,659 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-17 03:33:05,660 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-17 03:33:05,661 INFO L274 PluginConnector]: CDTParser initialized [2024-11-17 03:33:05,664 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/chl-nzb-file-trans.wvr.c [2024-11-17 03:33:07,103 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-17 03:33:07,327 INFO L384 CDTParser]: Found 1 translation units. [2024-11-17 03:33:07,328 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-nzb-file-trans.wvr.c [2024-11-17 03:33:07,341 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da20b0636/277d690c024344c79fc8430688b6563b/FLAGaf6f20644 [2024-11-17 03:33:07,676 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da20b0636/277d690c024344c79fc8430688b6563b [2024-11-17 03:33:07,678 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-17 03:33:07,679 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-17 03:33:07,681 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-17 03:33:07,681 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-17 03:33:07,687 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-17 03:33:07,688 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:33:07" (1/1) ... [2024-11-17 03:33:07,691 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ed280f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:33:07, skipping insertion in model container [2024-11-17 03:33:07,691 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:33:07" (1/1) ... [2024-11-17 03:33:07,718 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-17 03:33:07,949 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-17 03:33:07,953 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-17 03:33:07,964 INFO L200 MainTranslator]: Completed pre-run [2024-11-17 03:33:08,021 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-17 03:33:08,046 INFO L204 MainTranslator]: Completed translation [2024-11-17 03:33:08,047 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:33:08 WrapperNode [2024-11-17 03:33:08,047 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-17 03:33:08,048 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-17 03:33:08,049 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-17 03:33:08,049 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-17 03:33:08,056 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:33:08" (1/1) ... [2024-11-17 03:33:08,076 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:33:08" (1/1) ... [2024-11-17 03:33:08,137 INFO L138 Inliner]: procedures = 25, calls = 62, calls flagged for inlining = 29, calls inlined = 43, statements flattened = 599 [2024-11-17 03:33:08,138 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-17 03:33:08,139 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-17 03:33:08,139 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-17 03:33:08,140 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-17 03:33:08,150 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:33:08" (1/1) ... [2024-11-17 03:33:08,152 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:33:08" (1/1) ... [2024-11-17 03:33:08,165 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:33:08" (1/1) ... [2024-11-17 03:33:08,190 INFO L175 MemorySlicer]: Split 29 memory accesses to 2 slices as follows [2, 27]. 93 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2024-11-17 03:33:08,191 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:33:08" (1/1) ... [2024-11-17 03:33:08,191 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:33:08" (1/1) ... [2024-11-17 03:33:08,213 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:33:08" (1/1) ... [2024-11-17 03:33:08,215 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:33:08" (1/1) ... [2024-11-17 03:33:08,221 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:33:08" (1/1) ... [2024-11-17 03:33:08,228 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:33:08" (1/1) ... [2024-11-17 03:33:08,240 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-17 03:33:08,242 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-17 03:33:08,242 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-17 03:33:08,242 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-17 03:33:08,243 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:33:08" (1/1) ... [2024-11-17 03:33:08,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-17 03:33:08,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:33:08,280 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-17 03:33:08,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-17 03:33:08,334 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-17 03:33:08,335 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-17 03:33:08,335 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-17 03:33:08,335 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-17 03:33:08,335 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-17 03:33:08,336 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-17 03:33:08,336 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-17 03:33:08,336 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-17 03:33:08,336 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-17 03:33:08,336 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-17 03:33:08,336 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-17 03:33:08,336 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-17 03:33:08,336 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-17 03:33:08,336 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-17 03:33:08,337 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-17 03:33:08,337 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-17 03:33:08,339 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-17 03:33:08,472 INFO L256 CfgBuilder]: Building ICFG [2024-11-17 03:33:08,474 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-17 03:33:09,438 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-17 03:33:09,438 INFO L307 CfgBuilder]: Performing block encoding [2024-11-17 03:33:10,092 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-17 03:33:10,093 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-17 03:33:10,093 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.11 03:33:10 BoogieIcfgContainer [2024-11-17 03:33:10,093 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-17 03:33:10,095 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-17 03:33:10,095 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-17 03:33:10,098 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-17 03:33:10,099 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 03:33:07" (1/3) ... [2024-11-17 03:33:10,099 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42808bf5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:33:10, skipping insertion in model container [2024-11-17 03:33:10,100 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:33:08" (2/3) ... [2024-11-17 03:33:10,100 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42808bf5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:33:10, skipping insertion in model container [2024-11-17 03:33:10,102 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.11 03:33:10" (3/3) ... [2024-11-17 03:33:10,103 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-nzb-file-trans.wvr.c [2024-11-17 03:33:10,121 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-17 03:33:10,122 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 56 error locations. [2024-11-17 03:33:10,122 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-17 03:33:10,267 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-17 03:33:10,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 172 places, 195 transitions, 411 flow [2024-11-17 03:33:10,388 INFO L124 PetriNetUnfolderBase]: 33/192 cut-off events. [2024-11-17 03:33:10,388 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-17 03:33:10,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 205 conditions, 192 events. 33/192 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 709 event pairs, 0 based on Foata normal form. 0/103 useless extension candidates. Maximal degree in co-relation 162. Up to 2 conditions per place. [2024-11-17 03:33:10,399 INFO L82 GeneralOperation]: Start removeDead. Operand has 172 places, 195 transitions, 411 flow [2024-11-17 03:33:10,409 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 168 places, 191 transitions, 400 flow [2024-11-17 03:33:10,423 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-17 03:33:10,431 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;@6f191a6a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-17 03:33:10,432 INFO L334 AbstractCegarLoop]: Starting to check reachability of 107 error locations. [2024-11-17 03:33:10,436 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-17 03:33:10,437 INFO L124 PetriNetUnfolderBase]: 2/7 cut-off events. [2024-11-17 03:33:10,437 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-17 03:33:10,437 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:33:10,438 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-17 03:33:10,438 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 104 more)] === [2024-11-17 03:33:10,443 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:33:10,444 INFO L85 PathProgramCache]: Analyzing trace with hash 53396452, now seen corresponding path program 1 times [2024-11-17 03:33:10,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:33:10,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130434820] [2024-11-17 03:33:10,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:33:10,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:33:10,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:33:10,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:33:10,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:33:10,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130434820] [2024-11-17 03:33:10,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130434820] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:33:10,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:33:10,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-17 03:33:10,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052196845] [2024-11-17 03:33:10,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:33:10,787 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-17 03:33:10,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:33:10,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-17 03:33:10,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-17 03:33:10,891 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 195 [2024-11-17 03:33:10,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 191 transitions, 400 flow. Second operand has 3 states, 3 states have (on average 99.0) internal successors, (297), 3 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:33:10,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:33:10,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 195 [2024-11-17 03:33:10,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:33:19,206 INFO L124 PetriNetUnfolderBase]: 49598/89293 cut-off events. [2024-11-17 03:33:19,207 INFO L125 PetriNetUnfolderBase]: For 1212/1212 co-relation queries the response was YES. [2024-11-17 03:33:19,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153718 conditions, 89293 events. 49598/89293 cut-off events. For 1212/1212 co-relation queries the response was YES. Maximal size of possible extension queue 2267. Compared 850468 event pairs, 29352 based on Foata normal form. 4/71877 useless extension candidates. Maximal degree in co-relation 150410. Up to 63479 conditions per place. [2024-11-17 03:33:20,097 INFO L140 encePairwiseOnDemand]: 183/195 looper letters, 84 selfloop transitions, 2 changer transitions 0/180 dead transitions. [2024-11-17 03:33:20,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 180 transitions, 550 flow [2024-11-17 03:33:20,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:33:20,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:33:20,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 390 transitions. [2024-11-17 03:33:20,115 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-11-17 03:33:20,118 INFO L175 Difference]: Start difference. First operand has 168 places, 191 transitions, 400 flow. Second operand 3 states and 390 transitions. [2024-11-17 03:33:20,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 180 transitions, 550 flow [2024-11-17 03:33:20,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 180 transitions, 538 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-17 03:33:20,133 INFO L231 Difference]: Finished difference. Result has 159 places, 180 transitions, 370 flow [2024-11-17 03:33:20,136 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=195, PETRI_DIFFERENCE_MINUEND_FLOW=366, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=370, PETRI_PLACES=159, PETRI_TRANSITIONS=180} [2024-11-17 03:33:20,142 INFO L277 CegarLoopForPetriNet]: 168 programPoint places, -9 predicate places. [2024-11-17 03:33:20,143 INFO L471 AbstractCegarLoop]: Abstraction has has 159 places, 180 transitions, 370 flow [2024-11-17 03:33:20,143 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 99.0) internal successors, (297), 3 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:33:20,143 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:33:20,144 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-17 03:33:20,144 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-17 03:33:20,144 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 104 more)] === [2024-11-17 03:33:20,145 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:33:20,146 INFO L85 PathProgramCache]: Analyzing trace with hash 53396453, now seen corresponding path program 1 times [2024-11-17 03:33:20,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:33:20,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568611019] [2024-11-17 03:33:20,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:33:20,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:33:20,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:33:20,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:33:20,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:33:20,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568611019] [2024-11-17 03:33:20,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568611019] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:33:20,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:33:20,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-17 03:33:20,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984638980] [2024-11-17 03:33:20,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:33:20,435 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 03:33:20,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:33:20,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 03:33:20,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-17 03:33:20,550 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 195 [2024-11-17 03:33:20,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 180 transitions, 370 flow. Second operand has 4 states, 4 states have (on average 98.75) internal successors, (395), 4 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:33:20,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:33:20,551 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 195 [2024-11-17 03:33:20,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:33:27,029 INFO L124 PetriNetUnfolderBase]: 49601/89308 cut-off events. [2024-11-17 03:33:27,029 INFO L125 PetriNetUnfolderBase]: For 300/300 co-relation queries the response was YES. [2024-11-17 03:33:27,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153124 conditions, 89308 events. 49601/89308 cut-off events. For 300/300 co-relation queries the response was YES. Maximal size of possible extension queue 2267. Compared 850665 event pairs, 29352 based on Foata normal form. 0/71885 useless extension candidates. Maximal degree in co-relation 153062. Up to 63492 conditions per place. [2024-11-17 03:33:27,504 INFO L140 encePairwiseOnDemand]: 185/195 looper letters, 91 selfloop transitions, 7 changer transitions 0/189 dead transitions. [2024-11-17 03:33:27,505 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 189 transitions, 586 flow [2024-11-17 03:33:27,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:33:27,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:33:27,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 395 transitions. [2024-11-17 03:33:27,508 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6752136752136753 [2024-11-17 03:33:27,508 INFO L175 Difference]: Start difference. First operand has 159 places, 180 transitions, 370 flow. Second operand 3 states and 395 transitions. [2024-11-17 03:33:27,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 189 transitions, 586 flow [2024-11-17 03:33:27,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 189 transitions, 580 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:33:27,516 INFO L231 Difference]: Finished difference. Result has 161 places, 186 transitions, 424 flow [2024-11-17 03:33:27,519 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=195, PETRI_DIFFERENCE_MINUEND_FLOW=366, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=424, PETRI_PLACES=161, PETRI_TRANSITIONS=186} [2024-11-17 03:33:27,519 INFO L277 CegarLoopForPetriNet]: 168 programPoint places, -7 predicate places. [2024-11-17 03:33:27,519 INFO L471 AbstractCegarLoop]: Abstraction has has 161 places, 186 transitions, 424 flow [2024-11-17 03:33:27,520 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 98.75) internal successors, (395), 4 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:33:27,520 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:33:27,520 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1] [2024-11-17 03:33:27,520 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-17 03:33:27,520 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 104 more)] === [2024-11-17 03:33:27,521 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:33:27,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1597540871, now seen corresponding path program 1 times [2024-11-17 03:33:27,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:33:27,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096682990] [2024-11-17 03:33:27,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:33:27,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:33:27,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:33:27,751 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:33:27,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:33:27,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096682990] [2024-11-17 03:33:27,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096682990] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:33:27,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617446039] [2024-11-17 03:33:27,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:33:27,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:33:27,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:33:27,755 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:33:27,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-17 03:33:27,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:33:27,873 INFO L255 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-17 03:33:27,877 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:33:27,938 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-17 03:33:28,007 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:33:28,007 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:33:28,095 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:33:28,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617446039] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:33:28,097 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:33:28,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2024-11-17 03:33:28,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723361850] [2024-11-17 03:33:28,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:33:28,098 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-17 03:33:28,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:33:28,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-17 03:33:28,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-11-17 03:33:28,504 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 195 [2024-11-17 03:33:28,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 186 transitions, 424 flow. Second operand has 9 states, 9 states have (on average 99.66666666666667) internal successors, (897), 9 states have internal predecessors, (897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:33:28,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:33:28,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 195 [2024-11-17 03:33:28,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:33:35,335 INFO L124 PetriNetUnfolderBase]: 49610/89353 cut-off events. [2024-11-17 03:33:35,336 INFO L125 PetriNetUnfolderBase]: For 334/334 co-relation queries the response was YES. [2024-11-17 03:33:35,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153241 conditions, 89353 events. 49610/89353 cut-off events. For 334/334 co-relation queries the response was YES. Maximal size of possible extension queue 2267. Compared 850967 event pairs, 29352 based on Foata normal form. 0/71930 useless extension candidates. Maximal degree in co-relation 153062. Up to 63495 conditions per place. [2024-11-17 03:33:35,889 INFO L140 encePairwiseOnDemand]: 185/195 looper letters, 100 selfloop transitions, 25 changer transitions 0/216 dead transitions. [2024-11-17 03:33:35,889 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 216 transitions, 782 flow [2024-11-17 03:33:35,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-17 03:33:35,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-17 03:33:35,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 722 transitions. [2024-11-17 03:33:35,892 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6170940170940171 [2024-11-17 03:33:35,892 INFO L175 Difference]: Start difference. First operand has 161 places, 186 transitions, 424 flow. Second operand 6 states and 722 transitions. [2024-11-17 03:33:35,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 216 transitions, 782 flow [2024-11-17 03:33:35,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 216 transitions, 756 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:33:35,898 INFO L231 Difference]: Finished difference. Result has 167 places, 204 transitions, 585 flow [2024-11-17 03:33:35,899 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=195, PETRI_DIFFERENCE_MINUEND_FLOW=410, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=585, PETRI_PLACES=167, PETRI_TRANSITIONS=204} [2024-11-17 03:33:35,899 INFO L277 CegarLoopForPetriNet]: 168 programPoint places, -1 predicate places. [2024-11-17 03:33:35,900 INFO L471 AbstractCegarLoop]: Abstraction has has 167 places, 204 transitions, 585 flow [2024-11-17 03:33:35,900 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 99.66666666666667) internal successors, (897), 9 states have internal predecessors, (897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:33:35,901 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:33:35,901 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 1, 1] [2024-11-17 03:33:35,919 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-17 03:33:36,101 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:33:36,102 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 104 more)] === [2024-11-17 03:33:36,103 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:33:36,103 INFO L85 PathProgramCache]: Analyzing trace with hash -609772187, now seen corresponding path program 2 times [2024-11-17 03:33:36,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:33:36,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354557740] [2024-11-17 03:33:36,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:33:36,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:33:36,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:33:36,506 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:33:36,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:33:36,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354557740] [2024-11-17 03:33:36,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354557740] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:33:36,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206652460] [2024-11-17 03:33:36,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-17 03:33:36,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:33:36,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:33:36,512 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:33:36,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-17 03:33:36,634 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-17 03:33:36,634 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:33:36,636 INFO L255 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-17 03:33:36,638 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:33:36,656 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 7 [2024-11-17 03:33:36,986 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 26 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:33:36,987 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:33:37,370 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:33:37,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206652460] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:33:37,371 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:33:37,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2024-11-17 03:33:37,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430290770] [2024-11-17 03:33:37,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:33:37,373 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-17 03:33:37,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:33:37,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-17 03:33:37,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2024-11-17 03:33:38,519 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 195 [2024-11-17 03:33:38,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 204 transitions, 585 flow. Second operand has 20 states, 20 states have (on average 96.65) internal successors, (1933), 20 states have internal predecessors, (1933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:33:38,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:33:38,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 195 [2024-11-17 03:33:38,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:33:46,941 INFO L124 PetriNetUnfolderBase]: 49598/89332 cut-off events. [2024-11-17 03:33:46,942 INFO L125 PetriNetUnfolderBase]: For 352/352 co-relation queries the response was YES. [2024-11-17 03:33:47,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153214 conditions, 89332 events. 49598/89332 cut-off events. For 352/352 co-relation queries the response was YES. Maximal size of possible extension queue 2267. Compared 850487 event pairs, 29352 based on Foata normal form. 3/71912 useless extension candidates. Maximal degree in co-relation 153094. Up to 63479 conditions per place. [2024-11-17 03:33:47,472 INFO L140 encePairwiseOnDemand]: 179/195 looper letters, 94 selfloop transitions, 22 changer transitions 0/204 dead transitions. [2024-11-17 03:33:47,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 204 transitions, 740 flow [2024-11-17 03:33:47,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-17 03:33:47,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-17 03:33:47,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 894 transitions. [2024-11-17 03:33:47,475 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.573076923076923 [2024-11-17 03:33:47,475 INFO L175 Difference]: Start difference. First operand has 167 places, 204 transitions, 585 flow. Second operand 8 states and 894 transitions. [2024-11-17 03:33:47,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 204 transitions, 740 flow [2024-11-17 03:33:47,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 204 transitions, 682 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-11-17 03:33:47,481 INFO L231 Difference]: Finished difference. Result has 172 places, 192 transitions, 548 flow [2024-11-17 03:33:47,481 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=195, PETRI_DIFFERENCE_MINUEND_FLOW=420, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=548, PETRI_PLACES=172, PETRI_TRANSITIONS=192} [2024-11-17 03:33:47,486 INFO L277 CegarLoopForPetriNet]: 168 programPoint places, 4 predicate places. [2024-11-17 03:33:47,486 INFO L471 AbstractCegarLoop]: Abstraction has has 172 places, 192 transitions, 548 flow [2024-11-17 03:33:47,487 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 96.65) internal successors, (1933), 20 states have internal predecessors, (1933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:33:47,487 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:33:47,488 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:33:47,530 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-17 03:33:47,688 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,SelfDestructingSolverStorable3 [2024-11-17 03:33:47,689 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 104 more)] === [2024-11-17 03:33:47,689 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:33:47,689 INFO L85 PathProgramCache]: Analyzing trace with hash -121705948, now seen corresponding path program 1 times [2024-11-17 03:33:47,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:33:47,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678309496] [2024-11-17 03:33:47,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:33:47,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:33:47,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:33:48,647 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2024-11-17 03:33:48,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:33:48,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678309496] [2024-11-17 03:33:48,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678309496] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:33:48,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:33:48,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-17 03:33:48,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069918546] [2024-11-17 03:33:48,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:33:48,650 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-17 03:33:48,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:33:48,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-17 03:33:48,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-17 03:33:48,803 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 195 [2024-11-17 03:33:48,804 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 192 transitions, 548 flow. Second operand has 6 states, 6 states have (on average 93.33333333333333) internal successors, (560), 6 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:33:48,804 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:33:48,804 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 195 [2024-11-17 03:33:48,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand