./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/goblint-regression/28-race_reach_21-deref_read_racing.i --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/goblint-regression/28-race_reach_21-deref_read_racing.i -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 cb010ae024b402436affeb854f96a5f9e0df3d8ec2cfe8b3a7f33676b7169a2c --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-3289d67-m [2024-11-17 03:28:16,774 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-17 03:28:16,820 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-17 03:28:16,826 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-17 03:28:16,826 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-17 03:28:16,855 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-17 03:28:16,856 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-17 03:28:16,856 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-17 03:28:16,857 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-17 03:28:16,858 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-17 03:28:16,859 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-17 03:28:16,859 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-17 03:28:16,859 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-17 03:28:16,861 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-17 03:28:16,861 INFO L153 SettingsManager]: * Use SBE=true [2024-11-17 03:28:16,861 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-17 03:28:16,861 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-17 03:28:16,861 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-17 03:28:16,862 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-17 03:28:16,862 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-17 03:28:16,862 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-17 03:28:16,866 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-17 03:28:16,866 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-17 03:28:16,866 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-17 03:28:16,867 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-17 03:28:16,867 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-17 03:28:16,867 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-17 03:28:16,867 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-17 03:28:16,867 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-17 03:28:16,868 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-17 03:28:16,868 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-17 03:28:16,868 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-17 03:28:16,868 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-17 03:28:16,868 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-17 03:28:16,868 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-17 03:28:16,869 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-17 03:28:16,869 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-17 03:28:16,869 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-17 03:28:16,869 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-17 03:28:16,869 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-17 03:28:16,869 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-17 03:28:16,870 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-17 03:28:16,870 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cb010ae024b402436affeb854f96a5f9e0df3d8ec2cfe8b3a7f33676b7169a2c [2024-11-17 03:28:17,058 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-17 03:28:17,078 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-17 03:28:17,079 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-17 03:28:17,080 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-17 03:28:17,081 INFO L274 PluginConnector]: CDTParser initialized [2024-11-17 03:28:17,082 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/28-race_reach_21-deref_read_racing.i [2024-11-17 03:28:18,319 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-17 03:28:18,515 INFO L384 CDTParser]: Found 1 translation units. [2024-11-17 03:28:18,515 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_21-deref_read_racing.i [2024-11-17 03:28:18,527 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8636d3297/da1aaf9a8dc94b7f8ce10c6ce9b4ba95/FLAG3f9723fec [2024-11-17 03:28:18,537 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8636d3297/da1aaf9a8dc94b7f8ce10c6ce9b4ba95 [2024-11-17 03:28:18,539 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-17 03:28:18,540 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-17 03:28:18,541 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-17 03:28:18,541 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-17 03:28:18,545 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-17 03:28:18,546 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:28:18" (1/1) ... [2024-11-17 03:28:18,546 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c9a1fe8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:28:18, skipping insertion in model container [2024-11-17 03:28:18,546 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:28:18" (1/1) ... [2024-11-17 03:28:18,579 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-17 03:28:18,906 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-17 03:28:18,923 INFO L200 MainTranslator]: Completed pre-run [2024-11-17 03:28:18,965 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-17 03:28:19,004 INFO L204 MainTranslator]: Completed translation [2024-11-17 03:28:19,005 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:28:19 WrapperNode [2024-11-17 03:28:19,005 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-17 03:28:19,006 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-17 03:28:19,006 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-17 03:28:19,007 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-17 03:28:19,013 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:28:19" (1/1) ... [2024-11-17 03:28:19,029 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:28:19" (1/1) ... [2024-11-17 03:28:19,048 INFO L138 Inliner]: procedures = 170, calls = 36, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 63 [2024-11-17 03:28:19,049 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-17 03:28:19,050 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-17 03:28:19,051 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-17 03:28:19,051 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-17 03:28:19,059 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:28:19" (1/1) ... [2024-11-17 03:28:19,059 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:28:19" (1/1) ... [2024-11-17 03:28:19,062 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:28:19" (1/1) ... [2024-11-17 03:28:19,076 INFO L175 MemorySlicer]: Split 18 memory accesses to 4 slices as follows [2, 5, 6, 5]. 33 percent of accesses are in the largest equivalence class. The 13 initializations are split as follows [2, 5, 1, 5]. The 2 writes are split as follows [0, 0, 2, 0]. [2024-11-17 03:28:19,080 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:28:19" (1/1) ... [2024-11-17 03:28:19,080 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:28:19" (1/1) ... [2024-11-17 03:28:19,085 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:28:19" (1/1) ... [2024-11-17 03:28:19,086 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:28:19" (1/1) ... [2024-11-17 03:28:19,087 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:28:19" (1/1) ... [2024-11-17 03:28:19,091 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:28:19" (1/1) ... [2024-11-17 03:28:19,093 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-17 03:28:19,094 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-17 03:28:19,094 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-17 03:28:19,094 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-17 03:28:19,095 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:28:19" (1/1) ... [2024-11-17 03:28:19,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-17 03:28:19,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:28:19,124 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 03:28:19,125 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 03:28:19,158 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-17 03:28:19,158 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-17 03:28:19,159 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-17 03:28:19,159 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-17 03:28:19,159 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-17 03:28:19,159 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-17 03:28:19,159 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-17 03:28:19,159 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-17 03:28:19,160 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-11-17 03:28:19,160 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-17 03:28:19,160 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2024-11-17 03:28:19,161 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2024-11-17 03:28:19,161 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-17 03:28:19,161 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-17 03:28:19,162 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-17 03:28:19,162 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-17 03:28:19,162 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-11-17 03:28:19,162 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-17 03:28:19,162 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-17 03:28:19,163 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 03:28:19,267 INFO L256 CfgBuilder]: Building ICFG [2024-11-17 03:28:19,268 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-17 03:28:19,441 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-17 03:28:19,443 INFO L307 CfgBuilder]: Performing block encoding [2024-11-17 03:28:19,537 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-17 03:28:19,537 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-17 03:28:19,537 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.11 03:28:19 BoogieIcfgContainer [2024-11-17 03:28:19,537 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-17 03:28:19,539 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-17 03:28:19,539 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-17 03:28:19,542 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-17 03:28:19,543 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 03:28:18" (1/3) ... [2024-11-17 03:28:19,543 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a74ab4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:28:19, skipping insertion in model container [2024-11-17 03:28:19,544 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:28:19" (2/3) ... [2024-11-17 03:28:19,545 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a74ab4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:28:19, skipping insertion in model container [2024-11-17 03:28:19,545 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.11 03:28:19" (3/3) ... [2024-11-17 03:28:19,546 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_21-deref_read_racing.i [2024-11-17 03:28:19,558 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-17 03:28:19,559 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 13 error locations. [2024-11-17 03:28:19,559 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-17 03:28:19,590 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-17 03:28:19,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 62 places, 70 transitions, 144 flow [2024-11-17 03:28:19,651 INFO L124 PetriNetUnfolderBase]: 16/99 cut-off events. [2024-11-17 03:28:19,651 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-17 03:28:19,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103 conditions, 99 events. 16/99 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 343 event pairs, 0 based on Foata normal form. 0/63 useless extension candidates. Maximal degree in co-relation 67. Up to 4 conditions per place. [2024-11-17 03:28:19,655 INFO L82 GeneralOperation]: Start removeDead. Operand has 62 places, 70 transitions, 144 flow [2024-11-17 03:28:19,658 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 62 places, 70 transitions, 144 flow [2024-11-17 03:28:19,664 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-17 03:28:19,669 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;@27e73152, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-17 03:28:19,669 INFO L334 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2024-11-17 03:28:19,672 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-17 03:28:19,672 INFO L124 PetriNetUnfolderBase]: 1/6 cut-off events. [2024-11-17 03:28:19,672 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-17 03:28:19,672 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:28:19,673 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-17 03:28:19,673 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr4ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-17 03:28:19,678 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:28:19,678 INFO L85 PathProgramCache]: Analyzing trace with hash 8911100, now seen corresponding path program 1 times [2024-11-17 03:28:19,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:28:19,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414670957] [2024-11-17 03:28:19,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:28:19,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:28:19,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:28:19,908 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 03:28:19,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:28:19,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414670957] [2024-11-17 03:28:19,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414670957] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:28:19,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:28:19,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-17 03:28:19,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831664649] [2024-11-17 03:28:19,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:28:19,919 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-17 03:28:19,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:28:19,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-17 03:28:19,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-17 03:28:20,003 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 70 [2024-11-17 03:28:20,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 70 transitions, 144 flow. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 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 03:28:20,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:28:20,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 70 [2024-11-17 03:28:20,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:28:20,150 INFO L124 PetriNetUnfolderBase]: 143/524 cut-off events. [2024-11-17 03:28:20,151 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-17 03:28:20,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 843 conditions, 524 events. 143/524 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 3002 event pairs, 120 based on Foata normal form. 143/604 useless extension candidates. Maximal degree in co-relation 825. Up to 300 conditions per place. [2024-11-17 03:28:20,158 INFO L140 encePairwiseOnDemand]: 55/70 looper letters, 37 selfloop transitions, 2 changer transitions 0/71 dead transitions. [2024-11-17 03:28:20,158 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 71 transitions, 224 flow [2024-11-17 03:28:20,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:28:20,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:28:20,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 155 transitions. [2024-11-17 03:28:20,169 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7380952380952381 [2024-11-17 03:28:20,170 INFO L175 Difference]: Start difference. First operand has 62 places, 70 transitions, 144 flow. Second operand 3 states and 155 transitions. [2024-11-17 03:28:20,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 71 transitions, 224 flow [2024-11-17 03:28:20,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 71 transitions, 224 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-17 03:28:20,174 INFO L231 Difference]: Finished difference. Result has 64 places, 58 transitions, 130 flow [2024-11-17 03:28:20,176 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=130, PETRI_PLACES=64, PETRI_TRANSITIONS=58} [2024-11-17 03:28:20,179 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 2 predicate places. [2024-11-17 03:28:20,180 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 58 transitions, 130 flow [2024-11-17 03:28:20,180 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 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 03:28:20,180 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:28:20,180 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2024-11-17 03:28:20,181 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-17 03:28:20,181 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr4ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-17 03:28:20,181 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:28:20,181 INFO L85 PathProgramCache]: Analyzing trace with hash 795804269, now seen corresponding path program 1 times [2024-11-17 03:28:20,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:28:20,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912872445] [2024-11-17 03:28:20,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:28:20,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:28:20,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:28:20,323 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 03:28:20,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:28:20,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912872445] [2024-11-17 03:28:20,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912872445] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:28:20,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089720573] [2024-11-17 03:28:20,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:28:20,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:28:20,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:28:20,327 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 03:28:20,328 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 03:28:20,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:28:20,396 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-17 03:28:20,399 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:28:20,429 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 03:28:20,429 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:28:20,466 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 03:28:20,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089720573] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:28:20,469 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:28:20,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2024-11-17 03:28:20,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608283967] [2024-11-17 03:28:20,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:28:20,471 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-17 03:28:20,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:28:20,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-17 03:28:20,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-11-17 03:28:20,479 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 70 [2024-11-17 03:28:20,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 58 transitions, 130 flow. Second operand has 7 states, 7 states have (on average 34.42857142857143) internal successors, (241), 7 states have internal predecessors, (241), 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 03:28:20,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:28:20,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 70 [2024-11-17 03:28:20,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:28:20,547 INFO L124 PetriNetUnfolderBase]: 33/149 cut-off events. [2024-11-17 03:28:20,548 INFO L125 PetriNetUnfolderBase]: For 31/31 co-relation queries the response was YES. [2024-11-17 03:28:20,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 265 conditions, 149 events. 33/149 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 474 event pairs, 20 based on Foata normal form. 24/160 useless extension candidates. Maximal degree in co-relation 244. Up to 69 conditions per place. [2024-11-17 03:28:20,550 INFO L140 encePairwiseOnDemand]: 66/70 looper letters, 27 selfloop transitions, 2 changer transitions 0/51 dead transitions. [2024-11-17 03:28:20,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 51 transitions, 170 flow [2024-11-17 03:28:20,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-17 03:28:20,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-17 03:28:20,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 159 transitions. [2024-11-17 03:28:20,551 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5678571428571428 [2024-11-17 03:28:20,551 INFO L175 Difference]: Start difference. First operand has 64 places, 58 transitions, 130 flow. Second operand 4 states and 159 transitions. [2024-11-17 03:28:20,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 51 transitions, 170 flow [2024-11-17 03:28:20,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 51 transitions, 164 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-17 03:28:20,553 INFO L231 Difference]: Finished difference. Result has 44 places, 38 transitions, 84 flow [2024-11-17 03:28:20,553 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=84, PETRI_PLACES=44, PETRI_TRANSITIONS=38} [2024-11-17 03:28:20,555 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, -18 predicate places. [2024-11-17 03:28:20,555 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 38 transitions, 84 flow [2024-11-17 03:28:20,556 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 34.42857142857143) internal successors, (241), 7 states have internal predecessors, (241), 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 03:28:20,556 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:28:20,556 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1] [2024-11-17 03:28:20,570 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-17 03:28:20,756 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:28:20,757 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr4ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-17 03:28:20,758 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:28:20,758 INFO L85 PathProgramCache]: Analyzing trace with hash -1099871088, now seen corresponding path program 1 times [2024-11-17 03:28:20,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:28:20,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719089861] [2024-11-17 03:28:20,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:28:20,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:28:20,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-17 03:28:20,774 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-17 03:28:20,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-17 03:28:20,807 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-17 03:28:20,807 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-17 03:28:20,808 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (21 of 22 remaining) [2024-11-17 03:28:20,810 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONARRAY_INDEX (20 of 22 remaining) [2024-11-17 03:28:20,810 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (19 of 22 remaining) [2024-11-17 03:28:20,810 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 22 remaining) [2024-11-17 03:28:20,810 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 22 remaining) [2024-11-17 03:28:20,810 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK (16 of 22 remaining) [2024-11-17 03:28:20,810 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 22 remaining) [2024-11-17 03:28:20,811 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 22 remaining) [2024-11-17 03:28:20,811 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 22 remaining) [2024-11-17 03:28:20,811 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 22 remaining) [2024-11-17 03:28:20,812 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 22 remaining) [2024-11-17 03:28:20,812 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 22 remaining) [2024-11-17 03:28:20,813 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 22 remaining) [2024-11-17 03:28:20,813 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 22 remaining) [2024-11-17 03:28:20,813 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 22 remaining) [2024-11-17 03:28:20,813 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 22 remaining) [2024-11-17 03:28:20,813 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 22 remaining) [2024-11-17 03:28:20,813 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 22 remaining) [2024-11-17 03:28:20,813 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 22 remaining) [2024-11-17 03:28:20,814 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 22 remaining) [2024-11-17 03:28:20,814 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 22 remaining) [2024-11-17 03:28:20,814 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 22 remaining) [2024-11-17 03:28:20,814 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-17 03:28:20,814 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2024-11-17 03:28:20,816 WARN L244 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-17 03:28:20,818 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-11-17 03:28:20,839 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-17 03:28:20,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 96 places, 108 transitions, 226 flow [2024-11-17 03:28:20,853 INFO L124 PetriNetUnfolderBase]: 27/167 cut-off events. [2024-11-17 03:28:20,854 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-17 03:28:20,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 175 conditions, 167 events. 27/167 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 703 event pairs, 0 based on Foata normal form. 0/106 useless extension candidates. Maximal degree in co-relation 104. Up to 6 conditions per place. [2024-11-17 03:28:20,855 INFO L82 GeneralOperation]: Start removeDead. Operand has 96 places, 108 transitions, 226 flow [2024-11-17 03:28:20,856 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 96 places, 108 transitions, 226 flow [2024-11-17 03:28:20,857 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-17 03:28:20,858 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;@27e73152, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-17 03:28:20,858 INFO L334 AbstractCegarLoop]: Starting to check reachability of 30 error locations. [2024-11-17 03:28:20,859 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-17 03:28:20,859 INFO L124 PetriNetUnfolderBase]: 1/6 cut-off events. [2024-11-17 03:28:20,859 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-17 03:28:20,859 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:28:20,859 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-17 03:28:20,863 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr4ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-17 03:28:20,863 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:28:20,863 INFO L85 PathProgramCache]: Analyzing trace with hash 12235772, now seen corresponding path program 1 times [2024-11-17 03:28:20,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:28:20,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430543439] [2024-11-17 03:28:20,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:28:20,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:28:20,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:28:20,889 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 03:28:20,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:28:20,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430543439] [2024-11-17 03:28:20,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430543439] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:28:20,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:28:20,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-17 03:28:20,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695668209] [2024-11-17 03:28:20,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:28:20,891 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-17 03:28:20,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:28:20,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-17 03:28:20,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-17 03:28:20,893 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 108 [2024-11-17 03:28:20,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 108 transitions, 226 flow. Second operand has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 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 03:28:20,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:28:20,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 108 [2024-11-17 03:28:20,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:28:21,639 INFO L124 PetriNetUnfolderBase]: 3707/8579 cut-off events. [2024-11-17 03:28:21,640 INFO L125 PetriNetUnfolderBase]: For 60/60 co-relation queries the response was YES. [2024-11-17 03:28:21,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14515 conditions, 8579 events. 3707/8579 cut-off events. For 60/60 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 77074 event pairs, 1716 based on Foata normal form. 2857/10634 useless extension candidates. Maximal degree in co-relation 1166. Up to 5880 conditions per place. [2024-11-17 03:28:21,686 INFO L140 encePairwiseOnDemand]: 87/108 looper letters, 50 selfloop transitions, 2 changer transitions 0/104 dead transitions. [2024-11-17 03:28:21,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 104 transitions, 322 flow [2024-11-17 03:28:21,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:28:21,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:28:21,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 234 transitions. [2024-11-17 03:28:21,689 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7222222222222222 [2024-11-17 03:28:21,689 INFO L175 Difference]: Start difference. First operand has 96 places, 108 transitions, 226 flow. Second operand 3 states and 234 transitions. [2024-11-17 03:28:21,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 104 transitions, 322 flow [2024-11-17 03:28:21,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 104 transitions, 322 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-17 03:28:21,693 INFO L231 Difference]: Finished difference. Result has 98 places, 91 transitions, 204 flow [2024-11-17 03:28:21,693 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=204, PETRI_PLACES=98, PETRI_TRANSITIONS=91} [2024-11-17 03:28:21,694 INFO L277 CegarLoopForPetriNet]: 96 programPoint places, 2 predicate places. [2024-11-17 03:28:21,695 INFO L471 AbstractCegarLoop]: Abstraction has has 98 places, 91 transitions, 204 flow [2024-11-17 03:28:21,696 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 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 03:28:21,696 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:28:21,696 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2024-11-17 03:28:21,696 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-17 03:28:21,696 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr4ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-17 03:28:21,696 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:28:21,697 INFO L85 PathProgramCache]: Analyzing trace with hash -1595460994, now seen corresponding path program 1 times [2024-11-17 03:28:21,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:28:21,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832843074] [2024-11-17 03:28:21,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:28:21,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:28:21,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:28:21,743 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 03:28:21,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:28:21,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832843074] [2024-11-17 03:28:21,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832843074] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:28:21,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452212351] [2024-11-17 03:28:21,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:28:21,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:28:21,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:28:21,746 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 03:28:21,747 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 03:28:21,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:28:21,802 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-17 03:28:21,802 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:28:21,815 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 03:28:21,815 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:28:21,853 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 03:28:21,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452212351] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:28:21,853 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:28:21,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2024-11-17 03:28:21,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683384800] [2024-11-17 03:28:21,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:28:21,854 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-17 03:28:21,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:28:21,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-17 03:28:21,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-11-17 03:28:21,859 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 108 [2024-11-17 03:28:21,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 91 transitions, 204 flow. Second operand has 7 states, 7 states have (on average 54.42857142857143) internal successors, (381), 7 states have internal predecessors, (381), 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 03:28:21,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:28:21,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 108 [2024-11-17 03:28:21,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:28:22,527 INFO L124 PetriNetUnfolderBase]: 3333/7845 cut-off events. [2024-11-17 03:28:22,528 INFO L125 PetriNetUnfolderBase]: For 491/491 co-relation queries the response was YES. [2024-11-17 03:28:22,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13458 conditions, 7845 events. 3333/7845 cut-off events. For 491/491 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 70188 event pairs, 396 based on Foata normal form. 168/7598 useless extension candidates. Maximal degree in co-relation 1142. Up to 3265 conditions per place. [2024-11-17 03:28:22,565 INFO L140 encePairwiseOnDemand]: 103/108 looper letters, 93 selfloop transitions, 4 changer transitions 0/149 dead transitions. [2024-11-17 03:28:22,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 149 transitions, 512 flow [2024-11-17 03:28:22,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-17 03:28:22,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-17 03:28:22,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 360 transitions. [2024-11-17 03:28:22,570 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-11-17 03:28:22,570 INFO L175 Difference]: Start difference. First operand has 98 places, 91 transitions, 204 flow. Second operand 5 states and 360 transitions. [2024-11-17 03:28:22,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 149 transitions, 512 flow [2024-11-17 03:28:22,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 149 transitions, 510 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-17 03:28:22,575 INFO L231 Difference]: Finished difference. Result has 101 places, 90 transitions, 210 flow [2024-11-17 03:28:22,575 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=210, PETRI_PLACES=101, PETRI_TRANSITIONS=90} [2024-11-17 03:28:22,576 INFO L277 CegarLoopForPetriNet]: 96 programPoint places, 5 predicate places. [2024-11-17 03:28:22,576 INFO L471 AbstractCegarLoop]: Abstraction has has 101 places, 90 transitions, 210 flow [2024-11-17 03:28:22,577 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 54.42857142857143) internal successors, (381), 7 states have internal predecessors, (381), 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 03:28:22,577 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:28:22,577 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:28:22,592 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-17 03:28:22,777 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:28:22,778 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr4ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-17 03:28:22,779 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:28:22,779 INFO L85 PathProgramCache]: Analyzing trace with hash -727181988, now seen corresponding path program 1 times [2024-11-17 03:28:22,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:28:22,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735377580] [2024-11-17 03:28:22,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:28:22,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:28:22,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:28:22,839 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 03:28:22,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:28:22,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735377580] [2024-11-17 03:28:22,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735377580] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:28:22,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:28:22,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-17 03:28:22,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142266787] [2024-11-17 03:28:22,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:28:22,843 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-17 03:28:22,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:28:22,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-17 03:28:22,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-17 03:28:22,877 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 108 [2024-11-17 03:28:22,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 90 transitions, 210 flow. Second operand has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 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 03:28:22,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:28:22,878 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 108 [2024-11-17 03:28:22,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:28:23,412 INFO L124 PetriNetUnfolderBase]: 3069/6592 cut-off events. [2024-11-17 03:28:23,413 INFO L125 PetriNetUnfolderBase]: For 697/697 co-relation queries the response was YES. [2024-11-17 03:28:23,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12119 conditions, 6592 events. 3069/6592 cut-off events. For 697/697 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 53791 event pairs, 3069 based on Foata normal form. 0/6394 useless extension candidates. Maximal degree in co-relation 8706. Up to 4848 conditions per place. [2024-11-17 03:28:23,443 INFO L140 encePairwiseOnDemand]: 99/108 looper letters, 36 selfloop transitions, 1 changer transitions 0/82 dead transitions. [2024-11-17 03:28:23,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 82 transitions, 268 flow [2024-11-17 03:28:23,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:28:23,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:28:23,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 182 transitions. [2024-11-17 03:28:23,445 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5617283950617284 [2024-11-17 03:28:23,445 INFO L175 Difference]: Start difference. First operand has 101 places, 90 transitions, 210 flow. Second operand 3 states and 182 transitions. [2024-11-17 03:28:23,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 82 transitions, 268 flow [2024-11-17 03:28:23,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 82 transitions, 260 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-11-17 03:28:23,449 INFO L231 Difference]: Finished difference. Result has 92 places, 82 transitions, 188 flow [2024-11-17 03:28:23,449 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=188, PETRI_PLACES=92, PETRI_TRANSITIONS=82} [2024-11-17 03:28:23,451 INFO L277 CegarLoopForPetriNet]: 96 programPoint places, -4 predicate places. [2024-11-17 03:28:23,451 INFO L471 AbstractCegarLoop]: Abstraction has has 92 places, 82 transitions, 188 flow [2024-11-17 03:28:23,451 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 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 03:28:23,451 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:28:23,451 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:28:23,452 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-17 03:28:23,452 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr4ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-17 03:28:23,453 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:28:23,453 INFO L85 PathProgramCache]: Analyzing trace with hash -727181987, now seen corresponding path program 1 times [2024-11-17 03:28:23,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:28:23,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81307698] [2024-11-17 03:28:23,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:28:23,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:28:23,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:28:23,530 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 03:28:23,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:28:23,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81307698] [2024-11-17 03:28:23,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81307698] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:28:23,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:28:23,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-17 03:28:23,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043449115] [2024-11-17 03:28:23,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:28:23,532 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-17 03:28:23,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:28:23,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-17 03:28:23,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-17 03:28:23,559 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 108 [2024-11-17 03:28:23,559 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 82 transitions, 188 flow. Second operand has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 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 03:28:23,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:28:23,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 108 [2024-11-17 03:28:23,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:28:23,887 INFO L124 PetriNetUnfolderBase]: 3069/6366 cut-off events. [2024-11-17 03:28:23,887 INFO L125 PetriNetUnfolderBase]: For 234/234 co-relation queries the response was YES. [2024-11-17 03:28:23,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11461 conditions, 6366 events. 3069/6366 cut-off events. For 234/234 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 50329 event pairs, 3069 based on Foata normal form. 0/6168 useless extension candidates. Maximal degree in co-relation 11450. Up to 4848 conditions per place. [2024-11-17 03:28:23,910 INFO L140 encePairwiseOnDemand]: 99/108 looper letters, 35 selfloop transitions, 1 changer transitions 1/74 dead transitions. [2024-11-17 03:28:23,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 74 transitions, 246 flow [2024-11-17 03:28:23,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:28:23,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:28:23,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 182 transitions. [2024-11-17 03:28:23,911 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5617283950617284 [2024-11-17 03:28:23,911 INFO L175 Difference]: Start difference. First operand has 92 places, 82 transitions, 188 flow. Second operand 3 states and 182 transitions. [2024-11-17 03:28:23,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 74 transitions, 246 flow [2024-11-17 03:28:23,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 74 transitions, 245 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-17 03:28:23,913 INFO L231 Difference]: Finished difference. Result has 85 places, 73 transitions, 171 flow [2024-11-17 03:28:23,913 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=171, PETRI_PLACES=85, PETRI_TRANSITIONS=73} [2024-11-17 03:28:23,913 INFO L277 CegarLoopForPetriNet]: 96 programPoint places, -11 predicate places. [2024-11-17 03:28:23,914 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 73 transitions, 171 flow [2024-11-17 03:28:23,914 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 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 03:28:23,914 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:28:23,914 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1] [2024-11-17 03:28:23,914 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-17 03:28:23,914 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr4ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-17 03:28:23,915 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:28:23,915 INFO L85 PathProgramCache]: Analyzing trace with hash 2062814417, now seen corresponding path program 1 times [2024-11-17 03:28:23,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:28:23,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825517501] [2024-11-17 03:28:23,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:28:23,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:28:23,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-17 03:28:23,926 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-17 03:28:23,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-17 03:28:23,937 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-17 03:28:23,938 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-17 03:28:23,938 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (29 of 30 remaining) [2024-11-17 03:28:23,938 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONARRAY_INDEX (28 of 30 remaining) [2024-11-17 03:28:23,938 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (27 of 30 remaining) [2024-11-17 03:28:23,938 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 30 remaining) [2024-11-17 03:28:23,939 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 30 remaining) [2024-11-17 03:28:23,939 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK (24 of 30 remaining) [2024-11-17 03:28:23,939 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 30 remaining) [2024-11-17 03:28:23,939 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 30 remaining) [2024-11-17 03:28:23,939 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 30 remaining) [2024-11-17 03:28:23,939 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 30 remaining) [2024-11-17 03:28:23,939 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 30 remaining) [2024-11-17 03:28:23,940 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 30 remaining) [2024-11-17 03:28:23,940 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 30 remaining) [2024-11-17 03:28:23,940 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 30 remaining) [2024-11-17 03:28:23,940 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 30 remaining) [2024-11-17 03:28:23,940 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 30 remaining) [2024-11-17 03:28:23,940 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 30 remaining) [2024-11-17 03:28:23,940 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 30 remaining) [2024-11-17 03:28:23,941 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 30 remaining) [2024-11-17 03:28:23,941 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 30 remaining) [2024-11-17 03:28:23,941 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 30 remaining) [2024-11-17 03:28:23,941 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 30 remaining) [2024-11-17 03:28:23,941 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 30 remaining) [2024-11-17 03:28:23,941 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 30 remaining) [2024-11-17 03:28:23,941 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 30 remaining) [2024-11-17 03:28:23,942 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 30 remaining) [2024-11-17 03:28:23,942 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 30 remaining) [2024-11-17 03:28:23,942 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 30 remaining) [2024-11-17 03:28:23,942 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 30 remaining) [2024-11-17 03:28:23,942 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 30 remaining) [2024-11-17 03:28:23,942 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-17 03:28:23,942 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2024-11-17 03:28:23,943 WARN L244 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-17 03:28:23,943 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-11-17 03:28:23,970 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-17 03:28:23,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 130 places, 146 transitions, 310 flow [2024-11-17 03:28:23,984 INFO L124 PetriNetUnfolderBase]: 38/235 cut-off events. [2024-11-17 03:28:23,984 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-11-17 03:28:23,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 248 conditions, 235 events. 38/235 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1024 event pairs, 0 based on Foata normal form. 0/149 useless extension candidates. Maximal degree in co-relation 174. Up to 8 conditions per place. [2024-11-17 03:28:23,985 INFO L82 GeneralOperation]: Start removeDead. Operand has 130 places, 146 transitions, 310 flow [2024-11-17 03:28:23,987 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 130 places, 146 transitions, 310 flow [2024-11-17 03:28:23,987 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-17 03:28:23,988 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;@27e73152, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-17 03:28:23,988 INFO L334 AbstractCegarLoop]: Starting to check reachability of 38 error locations. [2024-11-17 03:28:23,989 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-17 03:28:23,989 INFO L124 PetriNetUnfolderBase]: 1/6 cut-off events. [2024-11-17 03:28:23,989 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-17 03:28:23,989 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:28:23,989 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-17 03:28:23,989 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr4ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-17 03:28:23,989 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:28:23,989 INFO L85 PathProgramCache]: Analyzing trace with hash 16730236, now seen corresponding path program 1 times [2024-11-17 03:28:23,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:28:23,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110607316] [2024-11-17 03:28:23,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:28:23,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:28:23,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:28:24,008 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 03:28:24,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:28:24,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110607316] [2024-11-17 03:28:24,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110607316] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:28:24,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:28:24,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-17 03:28:24,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42023051] [2024-11-17 03:28:24,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:28:24,010 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-17 03:28:24,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:28:24,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-17 03:28:24,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-17 03:28:24,011 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 146 [2024-11-17 03:28:24,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 146 transitions, 310 flow. Second operand has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 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 03:28:24,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:28:24,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 146 [2024-11-17 03:28:24,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:28:32,613 INFO L124 PetriNetUnfolderBase]: 68651/126107 cut-off events. [2024-11-17 03:28:32,613 INFO L125 PetriNetUnfolderBase]: For 1308/1308 co-relation queries the response was YES. [2024-11-17 03:28:32,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 221756 conditions, 126107 events. 68651/126107 cut-off events. For 1308/1308 co-relation queries the response was YES. Maximal size of possible extension queue 3040. Compared 1357020 event pairs, 44484 based on Foata normal form. 46825/162446 useless extension candidates. Maximal degree in co-relation 14463. Up to 95016 conditions per place. [2024-11-17 03:28:33,298 INFO L140 encePairwiseOnDemand]: 119/146 looper letters, 62 selfloop transitions, 2 changer transitions 0/136 dead transitions. [2024-11-17 03:28:33,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 136 transitions, 418 flow [2024-11-17 03:28:33,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:28:33,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:28:33,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 312 transitions. [2024-11-17 03:28:33,301 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7123287671232876 [2024-11-17 03:28:33,301 INFO L175 Difference]: Start difference. First operand has 130 places, 146 transitions, 310 flow. Second operand 3 states and 312 transitions. [2024-11-17 03:28:33,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 136 transitions, 418 flow [2024-11-17 03:28:33,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 136 transitions, 416 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-11-17 03:28:33,306 INFO L231 Difference]: Finished difference. Result has 132 places, 123 transitions, 274 flow [2024-11-17 03:28:33,306 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=274, PETRI_PLACES=132, PETRI_TRANSITIONS=123} [2024-11-17 03:28:33,307 INFO L277 CegarLoopForPetriNet]: 130 programPoint places, 2 predicate places. [2024-11-17 03:28:33,307 INFO L471 AbstractCegarLoop]: Abstraction has has 132 places, 123 transitions, 274 flow [2024-11-17 03:28:33,308 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 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 03:28:33,308 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:28:33,308 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2024-11-17 03:28:33,308 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-17 03:28:33,308 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr4ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-17 03:28:33,308 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:28:33,309 INFO L85 PathProgramCache]: Analyzing trace with hash -1658662987, now seen corresponding path program 1 times [2024-11-17 03:28:33,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:28:33,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455362268] [2024-11-17 03:28:33,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:28:33,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:28:33,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:28:33,361 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 03:28:33,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:28:33,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455362268] [2024-11-17 03:28:33,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455362268] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:28:33,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654714522] [2024-11-17 03:28:33,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:28:33,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:28:33,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:28:33,365 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:28:33,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-17 03:28:33,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:28:33,427 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-17 03:28:33,428 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:28:33,440 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 03:28:33,441 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:28:33,470 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 03:28:33,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654714522] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:28:33,471 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:28:33,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2024-11-17 03:28:33,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348357219] [2024-11-17 03:28:33,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:28:33,471 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-17 03:28:33,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:28:33,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-17 03:28:33,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-11-17 03:28:33,473 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 146 [2024-11-17 03:28:33,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 123 transitions, 274 flow. Second operand has 7 states, 7 states have (on average 74.42857142857143) internal successors, (521), 7 states have internal predecessors, (521), 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 03:28:33,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:28:33,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 146 [2024-11-17 03:28:33,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:28:40,910 INFO L124 PetriNetUnfolderBase]: 63525/113241 cut-off events. [2024-11-17 03:28:40,911 INFO L125 PetriNetUnfolderBase]: For 9335/9335 co-relation queries the response was YES. [2024-11-17 03:28:41,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 205399 conditions, 113241 events. 63525/113241 cut-off events. For 9335/9335 co-relation queries the response was YES. Maximal size of possible extension queue 2791. Compared 1183439 event pairs, 1800 based on Foata normal form. 1896/111566 useless extension candidates. Maximal degree in co-relation 17449. Up to 55105 conditions per place. [2024-11-17 03:28:41,700 INFO L140 encePairwiseOnDemand]: 141/146 looper letters, 152 selfloop transitions, 6 changer transitions 0/230 dead transitions. [2024-11-17 03:28:41,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 230 transitions, 806 flow [2024-11-17 03:28:41,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-17 03:28:41,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-17 03:28:41,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 594 transitions. [2024-11-17 03:28:41,702 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.678082191780822 [2024-11-17 03:28:41,702 INFO L175 Difference]: Start difference. First operand has 132 places, 123 transitions, 274 flow. Second operand 6 states and 594 transitions. [2024-11-17 03:28:41,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 230 transitions, 806 flow [2024-11-17 03:28:41,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 230 transitions, 804 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-17 03:28:41,708 INFO L231 Difference]: Finished difference. Result has 136 places, 124 transitions, 290 flow [2024-11-17 03:28:41,708 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=290, PETRI_PLACES=136, PETRI_TRANSITIONS=124} [2024-11-17 03:28:41,709 INFO L277 CegarLoopForPetriNet]: 130 programPoint places, 6 predicate places. [2024-11-17 03:28:41,709 INFO L471 AbstractCegarLoop]: Abstraction has has 136 places, 124 transitions, 290 flow [2024-11-17 03:28:41,709 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 74.42857142857143) internal successors, (521), 7 states have internal predecessors, (521), 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 03:28:41,709 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:28:41,709 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:28:41,722 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-17 03:28:41,910 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:28:41,914 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr4ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-17 03:28:41,914 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:28:41,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1220994925, now seen corresponding path program 1 times [2024-11-17 03:28:41,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:28:41,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756354087] [2024-11-17 03:28:41,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:28:41,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:28:41,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:28:41,957 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 03:28:41,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:28:41,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756354087] [2024-11-17 03:28:41,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756354087] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:28:41,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:28:41,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-17 03:28:41,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627773446] [2024-11-17 03:28:41,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:28:41,958 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-17 03:28:41,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:28:41,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-17 03:28:41,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-17 03:28:41,991 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 146 [2024-11-17 03:28:41,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 124 transitions, 290 flow. Second operand has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 3 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:28:41,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:28:41,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 146 [2024-11-17 03:28:41,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:28:49,040 INFO L124 PetriNetUnfolderBase]: 58509/101548 cut-off events. [2024-11-17 03:28:49,040 INFO L125 PetriNetUnfolderBase]: For 8465/8465 co-relation queries the response was YES. [2024-11-17 03:28:49,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 189124 conditions, 101548 events. 58509/101548 cut-off events. For 8465/8465 co-relation queries the response was YES. Maximal size of possible extension queue 2377. Compared 997740 event pairs, 58509 based on Foata normal form. 0/98747 useless extension candidates. Maximal degree in co-relation 140058. Up to 81024 conditions per place. [2024-11-17 03:28:49,550 INFO L140 encePairwiseOnDemand]: 133/146 looper letters, 50 selfloop transitions, 1 changer transitions 0/112 dead transitions. [2024-11-17 03:28:49,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 112 transitions, 368 flow [2024-11-17 03:28:49,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:28:49,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:28:49,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 246 transitions. [2024-11-17 03:28:49,552 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5616438356164384 [2024-11-17 03:28:49,552 INFO L175 Difference]: Start difference. First operand has 136 places, 124 transitions, 290 flow. Second operand 3 states and 246 transitions. [2024-11-17 03:28:49,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 112 transitions, 368 flow [2024-11-17 03:28:49,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 112 transitions, 361 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-11-17 03:28:49,555 INFO L231 Difference]: Finished difference. Result has 124 places, 112 transitions, 261 flow [2024-11-17 03:28:49,555 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=259, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=261, PETRI_PLACES=124, PETRI_TRANSITIONS=112} [2024-11-17 03:28:49,556 INFO L277 CegarLoopForPetriNet]: 130 programPoint places, -6 predicate places. [2024-11-17 03:28:49,556 INFO L471 AbstractCegarLoop]: Abstraction has has 124 places, 112 transitions, 261 flow [2024-11-17 03:28:49,556 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 3 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:28:49,556 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:28:49,556 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:28:49,556 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-17 03:28:49,556 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr4ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-17 03:28:49,557 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:28:49,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1220994924, now seen corresponding path program 1 times [2024-11-17 03:28:49,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:28:49,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646261430] [2024-11-17 03:28:49,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:28:49,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:28:49,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:28:49,623 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 03:28:49,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:28:49,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646261430] [2024-11-17 03:28:49,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646261430] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:28:49,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:28:49,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-17 03:28:49,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320690788] [2024-11-17 03:28:49,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:28:49,624 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-17 03:28:49,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:28:49,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-17 03:28:49,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-17 03:28:49,650 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 146 [2024-11-17 03:28:49,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 112 transitions, 261 flow. Second operand has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 3 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:28:49,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:28:49,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 146 [2024-11-17 03:28:49,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand