./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/goblint-regression/28-race_reach_37-indirect_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_37-indirect_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 78ae3f0dde82ce244d0cacebded5945a3f759d1f5aeba1d4553a1f59ef165385 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-3289d67-m [2024-11-17 03:28:27,756 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-17 03:28:27,819 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-17 03:28:27,824 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-17 03:28:27,826 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-17 03:28:27,859 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-17 03:28:27,860 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-17 03:28:27,860 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-17 03:28:27,861 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-17 03:28:27,862 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-17 03:28:27,863 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-17 03:28:27,863 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-17 03:28:27,864 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-17 03:28:27,865 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-17 03:28:27,866 INFO L153 SettingsManager]: * Use SBE=true [2024-11-17 03:28:27,879 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-17 03:28:27,879 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-17 03:28:27,880 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-17 03:28:27,880 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-17 03:28:27,880 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-17 03:28:27,881 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-17 03:28:27,881 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-17 03:28:27,881 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-17 03:28:27,882 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-17 03:28:27,882 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-17 03:28:27,882 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-17 03:28:27,883 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-17 03:28:27,883 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-17 03:28:27,883 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-17 03:28:27,884 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-17 03:28:27,884 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-17 03:28:27,884 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-17 03:28:27,885 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-17 03:28:27,885 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-17 03:28:27,885 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-17 03:28:27,886 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-17 03:28:27,886 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-17 03:28:27,886 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-17 03:28:27,887 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-17 03:28:27,887 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-17 03:28:27,887 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-17 03:28:27,888 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-17 03:28:27,888 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 78ae3f0dde82ce244d0cacebded5945a3f759d1f5aeba1d4553a1f59ef165385 [2024-11-17 03:28:28,142 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-17 03:28:28,167 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-17 03:28:28,170 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-17 03:28:28,172 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-17 03:28:28,172 INFO L274 PluginConnector]: CDTParser initialized [2024-11-17 03:28:28,174 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/28-race_reach_37-indirect_racing.i [2024-11-17 03:28:29,587 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-17 03:28:29,879 INFO L384 CDTParser]: Found 1 translation units. [2024-11-17 03:28:29,880 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_37-indirect_racing.i [2024-11-17 03:28:29,899 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/879c6beff/13500f3ffe3643e08f042bbd812c275e/FLAGdb46be7b0 [2024-11-17 03:28:29,914 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/879c6beff/13500f3ffe3643e08f042bbd812c275e [2024-11-17 03:28:29,918 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-17 03:28:29,920 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-17 03:28:29,922 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-17 03:28:29,923 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-17 03:28:29,928 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-17 03:28:29,928 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:28:29" (1/1) ... [2024-11-17 03:28:29,929 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9c36fe0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:28:29, skipping insertion in model container [2024-11-17 03:28:29,929 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:28:29" (1/1) ... [2024-11-17 03:28:29,973 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-17 03:28:30,336 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-17 03:28:30,352 INFO L200 MainTranslator]: Completed pre-run [2024-11-17 03:28:30,391 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-17 03:28:30,425 INFO L204 MainTranslator]: Completed translation [2024-11-17 03:28:30,426 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:28:30 WrapperNode [2024-11-17 03:28:30,426 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-17 03:28:30,427 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-17 03:28:30,427 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-17 03:28:30,428 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-17 03:28:30,434 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:28:30" (1/1) ... [2024-11-17 03:28:30,446 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:28:30" (1/1) ... [2024-11-17 03:28:30,470 INFO L138 Inliner]: procedures = 171, calls = 41, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 77 [2024-11-17 03:28:30,470 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-17 03:28:30,471 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-17 03:28:30,471 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-17 03:28:30,471 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-17 03:28:30,481 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:28:30" (1/1) ... [2024-11-17 03:28:30,482 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:28:30" (1/1) ... [2024-11-17 03:28:30,485 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:28:30" (1/1) ... [2024-11-17 03:28:30,500 INFO L175 MemorySlicer]: Split 20 memory accesses to 5 slices as follows [2, 5, 2, 6, 5]. 30 percent of accesses are in the largest equivalence class. The 13 initializations are split as follows [2, 5, 0, 1, 5]. The 3 writes are split as follows [0, 0, 1, 2, 0]. [2024-11-17 03:28:30,500 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:28:30" (1/1) ... [2024-11-17 03:28:30,501 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:28:30" (1/1) ... [2024-11-17 03:28:30,509 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:28:30" (1/1) ... [2024-11-17 03:28:30,509 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:28:30" (1/1) ... [2024-11-17 03:28:30,511 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:28:30" (1/1) ... [2024-11-17 03:28:30,512 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:28:30" (1/1) ... [2024-11-17 03:28:30,516 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-17 03:28:30,517 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-17 03:28:30,517 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-17 03:28:30,517 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-17 03:28:30,519 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:28:30" (1/1) ... [2024-11-17 03:28:30,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-17 03:28:30,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:28:30,553 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 03:28:30,564 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 03:28:30,609 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-17 03:28:30,609 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-17 03:28:30,609 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-17 03:28:30,609 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-17 03:28:30,610 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-11-17 03:28:30,610 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-17 03:28:30,611 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-17 03:28:30,611 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-17 03:28:30,611 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-17 03:28:30,611 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-11-17 03:28:30,611 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-11-17 03:28:30,611 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-17 03:28:30,612 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-17 03:28:30,612 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2024-11-17 03:28:30,612 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2024-11-17 03:28:30,612 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-17 03:28:30,612 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-17 03:28:30,612 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-17 03:28:30,612 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-17 03:28:30,612 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-17 03:28:30,612 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-11-17 03:28:30,613 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-11-17 03:28:30,613 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-17 03:28:30,613 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-17 03:28:30,617 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 03:28:30,770 INFO L256 CfgBuilder]: Building ICFG [2024-11-17 03:28:30,772 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-17 03:28:30,969 INFO L1250 $ProcedureCfgBuilder]: dead code at ProgramPoint L709: havoc main_~#t_ids~0#1.base, main_~#t_ids~0#1.offset; [2024-11-17 03:28:30,970 INFO L1250 $ProcedureCfgBuilder]: dead code at ProgramPoint L709-1: SUMMARY for call ULTIMATE.dealloc(main_~#t_ids~0#1.base, main_~#t_ids~0#1.offset); srcloc: null [2024-11-17 03:28:31,036 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-17 03:28:31,036 INFO L307 CfgBuilder]: Performing block encoding [2024-11-17 03:28:31,170 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-17 03:28:31,170 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-17 03:28:31,170 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.11 03:28:31 BoogieIcfgContainer [2024-11-17 03:28:31,171 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-17 03:28:31,173 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-17 03:28:31,173 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-17 03:28:31,176 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-17 03:28:31,176 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 03:28:29" (1/3) ... [2024-11-17 03:28:31,177 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3946bf48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:28:31, skipping insertion in model container [2024-11-17 03:28:31,177 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:28:30" (2/3) ... [2024-11-17 03:28:31,178 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3946bf48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:28:31, skipping insertion in model container [2024-11-17 03:28:31,178 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.11 03:28:31" (3/3) ... [2024-11-17 03:28:31,179 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_37-indirect_racing.i [2024-11-17 03:28:31,197 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-17 03:28:31,197 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2024-11-17 03:28:31,197 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-17 03:28:31,242 INFO L143 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2024-11-17 03:28:31,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 71 places, 81 transitions, 169 flow [2024-11-17 03:28:31,321 INFO L124 PetriNetUnfolderBase]: 19/119 cut-off events. [2024-11-17 03:28:31,321 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-17 03:28:31,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124 conditions, 119 events. 19/119 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 480 event pairs, 0 based on Foata normal form. 0/73 useless extension candidates. Maximal degree in co-relation 76. Up to 4 conditions per place. [2024-11-17 03:28:31,326 INFO L82 GeneralOperation]: Start removeDead. Operand has 71 places, 81 transitions, 169 flow [2024-11-17 03:28:31,330 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 71 places, 81 transitions, 169 flow [2024-11-17 03:28:31,339 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-17 03:28:31,345 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;@6b83867a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-17 03:28:31,345 INFO L334 AbstractCegarLoop]: Starting to check reachability of 25 error locations. [2024-11-17 03:28:31,350 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-17 03:28:31,350 INFO L124 PetriNetUnfolderBase]: 1/7 cut-off events. [2024-11-17 03:28:31,350 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-17 03:28:31,350 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:28:31,351 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-17 03:28:31,351 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-17 03:28:31,356 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:28:31,356 INFO L85 PathProgramCache]: Analyzing trace with hash 10180200, now seen corresponding path program 1 times [2024-11-17 03:28:31,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:28:31,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683355880] [2024-11-17 03:28:31,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:28:31,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:28:31,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:28:31,688 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 03:28:31,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:28:31,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683355880] [2024-11-17 03:28:31,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683355880] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:28:31,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:28:31,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-17 03:28:31,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714569635] [2024-11-17 03:28:31,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:28:31,701 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-17 03:28:31,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:28:31,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-17 03:28:31,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-17 03:28:31,769 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 81 [2024-11-17 03:28:31,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 81 transitions, 169 flow. Second operand has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 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 03:28:31,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:28:31,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 81 [2024-11-17 03:28:31,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:28:31,947 INFO L124 PetriNetUnfolderBase]: 122/504 cut-off events. [2024-11-17 03:28:31,948 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-17 03:28:31,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 788 conditions, 504 events. 122/504 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 2909 event pairs, 99 based on Foata normal form. 144/606 useless extension candidates. Maximal degree in co-relation 731. Up to 230 conditions per place. [2024-11-17 03:28:31,954 INFO L140 encePairwiseOnDemand]: 65/81 looper letters, 35 selfloop transitions, 2 changer transitions 0/77 dead transitions. [2024-11-17 03:28:31,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 77 transitions, 235 flow [2024-11-17 03:28:31,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:28:31,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:28:31,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 177 transitions. [2024-11-17 03:28:31,970 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7283950617283951 [2024-11-17 03:28:31,972 INFO L175 Difference]: Start difference. First operand has 71 places, 81 transitions, 169 flow. Second operand 3 states and 177 transitions. [2024-11-17 03:28:31,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 77 transitions, 235 flow [2024-11-17 03:28:31,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 77 transitions, 235 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-17 03:28:31,982 INFO L231 Difference]: Finished difference. Result has 70 places, 66 transitions, 143 flow [2024-11-17 03:28:31,984 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=143, PETRI_PLACES=70, PETRI_TRANSITIONS=66} [2024-11-17 03:28:31,989 INFO L277 CegarLoopForPetriNet]: 71 programPoint places, -1 predicate places. [2024-11-17 03:28:31,990 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 66 transitions, 143 flow [2024-11-17 03:28:31,990 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 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 03:28:31,990 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:28:31,991 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-17 03:28:31,991 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-17 03:28:31,992 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-17 03:28:31,992 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:28:31,993 INFO L85 PathProgramCache]: Analyzing trace with hash 10180201, now seen corresponding path program 1 times [2024-11-17 03:28:31,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:28:31,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824544432] [2024-11-17 03:28:31,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:28:31,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:28:32,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:28:32,136 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 03:28:32,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:28:32,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824544432] [2024-11-17 03:28:32,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824544432] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:28:32,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:28:32,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-17 03:28:32,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293594299] [2024-11-17 03:28:32,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:28:32,139 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-17 03:28:32,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:28:32,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-17 03:28:32,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-17 03:28:32,169 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 81 [2024-11-17 03:28:32,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 66 transitions, 143 flow. Second operand has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 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 03:28:32,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:28:32,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 81 [2024-11-17 03:28:32,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:28:32,297 INFO L124 PetriNetUnfolderBase]: 132/546 cut-off events. [2024-11-17 03:28:32,297 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2024-11-17 03:28:32,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 861 conditions, 546 events. 132/546 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 3169 event pairs, 121 based on Foata normal form. 1/480 useless extension candidates. Maximal degree in co-relation 829. Up to 281 conditions per place. [2024-11-17 03:28:32,303 INFO L140 encePairwiseOnDemand]: 77/81 looper letters, 37 selfloop transitions, 2 changer transitions 0/78 dead transitions. [2024-11-17 03:28:32,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 78 transitions, 245 flow [2024-11-17 03:28:32,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:28:32,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:28:32,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 164 transitions. [2024-11-17 03:28:32,307 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6748971193415638 [2024-11-17 03:28:32,307 INFO L175 Difference]: Start difference. First operand has 70 places, 66 transitions, 143 flow. Second operand 3 states and 164 transitions. [2024-11-17 03:28:32,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 78 transitions, 245 flow [2024-11-17 03:28:32,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 78 transitions, 241 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:28:32,310 INFO L231 Difference]: Finished difference. Result has 71 places, 66 transitions, 149 flow [2024-11-17 03:28:32,310 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=149, PETRI_PLACES=71, PETRI_TRANSITIONS=66} [2024-11-17 03:28:32,311 INFO L277 CegarLoopForPetriNet]: 71 programPoint places, 0 predicate places. [2024-11-17 03:28:32,311 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 66 transitions, 149 flow [2024-11-17 03:28:32,311 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 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 03:28:32,312 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:28:32,312 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2024-11-17 03:28:32,312 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-17 03:28:32,312 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-17 03:28:32,312 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:28:32,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1396515696, now seen corresponding path program 1 times [2024-11-17 03:28:32,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:28:32,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282888482] [2024-11-17 03:28:32,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:28:32,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:28:32,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:28:32,494 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 03:28:32,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:28:32,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282888482] [2024-11-17 03:28:32,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282888482] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:28:32,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13605722] [2024-11-17 03:28:32,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:28:32,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:28:32,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:28:32,515 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 03:28:32,517 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 03:28:32,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:28:32,611 INFO L255 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-17 03:28:32,617 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:28:32,680 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-17 03:28:32,761 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 03:28:32,764 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:28:32,839 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 03:28:32,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13605722] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:28:32,840 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:28:32,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2024-11-17 03:28:32,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723491819] [2024-11-17 03:28:32,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:28:32,841 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-17 03:28:32,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:28:32,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-17 03:28:32,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-11-17 03:28:32,923 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 81 [2024-11-17 03:28:32,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 66 transitions, 149 flow. Second operand has 7 states, 7 states have (on average 42.42857142857143) internal successors, (297), 7 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:28:32,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:28:32,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 81 [2024-11-17 03:28:32,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:28:32,996 INFO L124 PetriNetUnfolderBase]: 33/129 cut-off events. [2024-11-17 03:28:32,997 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2024-11-17 03:28:32,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 245 conditions, 129 events. 33/129 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 396 event pairs, 0 based on Foata normal form. 24/146 useless extension candidates. Maximal degree in co-relation 216. Up to 69 conditions per place. [2024-11-17 03:28:32,998 INFO L140 encePairwiseOnDemand]: 77/81 looper letters, 27 selfloop transitions, 2 changer transitions 0/51 dead transitions. [2024-11-17 03:28:32,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 51 transitions, 170 flow [2024-11-17 03:28:32,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-17 03:28:32,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-17 03:28:33,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 191 transitions. [2024-11-17 03:28:33,000 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5895061728395061 [2024-11-17 03:28:33,000 INFO L175 Difference]: Start difference. First operand has 71 places, 66 transitions, 149 flow. Second operand 4 states and 191 transitions. [2024-11-17 03:28:33,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 51 transitions, 170 flow [2024-11-17 03:28:33,001 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 03:28:33,002 INFO L231 Difference]: Finished difference. Result has 44 places, 38 transitions, 84 flow [2024-11-17 03:28:33,002 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, 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 03:28:33,003 INFO L277 CegarLoopForPetriNet]: 71 programPoint places, -27 predicate places. [2024-11-17 03:28:33,003 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 38 transitions, 84 flow [2024-11-17 03:28:33,003 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 42.42857142857143) internal successors, (297), 7 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:28:33,003 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:28:33,003 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1] [2024-11-17 03:28:33,021 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 03:28:33,207 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:28:33,208 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-17 03:28:33,208 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:28:33,209 INFO L85 PathProgramCache]: Analyzing trace with hash -342313326, now seen corresponding path program 1 times [2024-11-17 03:28:33,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:28:33,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501835428] [2024-11-17 03:28:33,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:28:33,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:28:33,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-17 03:28:33,233 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-17 03:28:33,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-17 03:28:33,271 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-17 03:28:33,272 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-17 03:28:33,273 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (24 of 25 remaining) [2024-11-17 03:28:33,275 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 25 remaining) [2024-11-17 03:28:33,275 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 25 remaining) [2024-11-17 03:28:33,275 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 25 remaining) [2024-11-17 03:28:33,275 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 25 remaining) [2024-11-17 03:28:33,275 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 25 remaining) [2024-11-17 03:28:33,276 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 25 remaining) [2024-11-17 03:28:33,276 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (17 of 25 remaining) [2024-11-17 03:28:33,276 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK (16 of 25 remaining) [2024-11-17 03:28:33,276 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 25 remaining) [2024-11-17 03:28:33,276 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 25 remaining) [2024-11-17 03:28:33,276 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 25 remaining) [2024-11-17 03:28:33,277 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 25 remaining) [2024-11-17 03:28:33,277 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 25 remaining) [2024-11-17 03:28:33,277 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 25 remaining) [2024-11-17 03:28:33,277 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 25 remaining) [2024-11-17 03:28:33,279 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 25 remaining) [2024-11-17 03:28:33,279 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 25 remaining) [2024-11-17 03:28:33,279 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 25 remaining) [2024-11-17 03:28:33,279 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 25 remaining) [2024-11-17 03:28:33,280 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 25 remaining) [2024-11-17 03:28:33,280 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 25 remaining) [2024-11-17 03:28:33,280 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 25 remaining) [2024-11-17 03:28:33,280 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 25 remaining) [2024-11-17 03:28:33,280 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 25 remaining) [2024-11-17 03:28:33,280 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-17 03:28:33,281 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2024-11-17 03:28:33,284 WARN L244 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-17 03:28:33,284 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-11-17 03:28:33,317 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-17 03:28:33,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 105 places, 120 transitions, 256 flow [2024-11-17 03:28:33,341 INFO L124 PetriNetUnfolderBase]: 34/211 cut-off events. [2024-11-17 03:28:33,342 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-17 03:28:33,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 223 conditions, 211 events. 34/211 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 996 event pairs, 0 based on Foata normal form. 0/130 useless extension candidates. Maximal degree in co-relation 126. Up to 8 conditions per place. [2024-11-17 03:28:33,344 INFO L82 GeneralOperation]: Start removeDead. Operand has 105 places, 120 transitions, 256 flow [2024-11-17 03:28:33,347 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 105 places, 120 transitions, 256 flow [2024-11-17 03:28:33,348 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-17 03:28:33,349 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;@6b83867a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-17 03:28:33,349 INFO L334 AbstractCegarLoop]: Starting to check reachability of 33 error locations. [2024-11-17 03:28:33,351 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-17 03:28:33,351 INFO L124 PetriNetUnfolderBase]: 1/7 cut-off events. [2024-11-17 03:28:33,351 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-17 03:28:33,351 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:28:33,351 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-17 03:28:33,351 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-17 03:28:33,352 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:28:33,352 INFO L85 PathProgramCache]: Analyzing trace with hash 13874280, now seen corresponding path program 1 times [2024-11-17 03:28:33,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:28:33,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643021007] [2024-11-17 03:28:33,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:28:33,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:28:33,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:28:33,385 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 03:28:33,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:28:33,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643021007] [2024-11-17 03:28:33,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643021007] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:28:33,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:28:33,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-17 03:28:33,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707784444] [2024-11-17 03:28:33,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:28:33,387 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-17 03:28:33,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:28:33,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-17 03:28:33,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-17 03:28:33,414 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 120 [2024-11-17 03:28:33,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 120 transitions, 256 flow. Second operand has 3 states, 3 states have (on average 61.0) internal successors, (183), 3 states have internal predecessors, (183), 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 03:28:33,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:28:33,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 120 [2024-11-17 03:28:33,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:28:34,475 INFO L124 PetriNetUnfolderBase]: 3252/7544 cut-off events. [2024-11-17 03:28:34,475 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2024-11-17 03:28:34,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12828 conditions, 7544 events. 3252/7544 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 65724 event pairs, 2658 based on Foata normal form. 2701/9732 useless extension candidates. Maximal degree in co-relation 8749. Up to 4298 conditions per place. [2024-11-17 03:28:34,536 INFO L140 encePairwiseOnDemand]: 98/120 looper letters, 59 selfloop transitions, 2 changer transitions 0/121 dead transitions. [2024-11-17 03:28:34,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 121 transitions, 380 flow [2024-11-17 03:28:34,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:28:34,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:28:34,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 273 transitions. [2024-11-17 03:28:34,538 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7583333333333333 [2024-11-17 03:28:34,538 INFO L175 Difference]: Start difference. First operand has 105 places, 120 transitions, 256 flow. Second operand 3 states and 273 transitions. [2024-11-17 03:28:34,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 121 transitions, 380 flow [2024-11-17 03:28:34,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 121 transitions, 380 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-17 03:28:34,543 INFO L231 Difference]: Finished difference. Result has 104 places, 99 transitions, 218 flow [2024-11-17 03:28:34,543 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=218, PETRI_PLACES=104, PETRI_TRANSITIONS=99} [2024-11-17 03:28:34,544 INFO L277 CegarLoopForPetriNet]: 105 programPoint places, -1 predicate places. [2024-11-17 03:28:34,544 INFO L471 AbstractCegarLoop]: Abstraction has has 104 places, 99 transitions, 218 flow [2024-11-17 03:28:34,545 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.0) internal successors, (183), 3 states have internal predecessors, (183), 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 03:28:34,545 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:28:34,545 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-17 03:28:34,545 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-17 03:28:34,546 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-17 03:28:34,546 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:28:34,546 INFO L85 PathProgramCache]: Analyzing trace with hash 13874281, now seen corresponding path program 1 times [2024-11-17 03:28:34,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:28:34,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030320332] [2024-11-17 03:28:34,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:28:34,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:28:34,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:28:34,622 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 03:28:34,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:28:34,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030320332] [2024-11-17 03:28:34,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030320332] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:28:34,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:28:34,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-17 03:28:34,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945039750] [2024-11-17 03:28:34,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:28:34,623 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-17 03:28:34,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:28:34,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-17 03:28:34,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-17 03:28:34,663 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 120 [2024-11-17 03:28:34,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 99 transitions, 218 flow. Second operand has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 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 03:28:34,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:28:34,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 120 [2024-11-17 03:28:34,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:28:35,637 INFO L124 PetriNetUnfolderBase]: 3507/8220 cut-off events. [2024-11-17 03:28:35,637 INFO L125 PetriNetUnfolderBase]: For 262/262 co-relation queries the response was YES. [2024-11-17 03:28:35,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14075 conditions, 8220 events. 3507/8220 cut-off events. For 262/262 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 72611 event pairs, 3314 based on Foata normal form. 1/7452 useless extension candidates. Maximal degree in co-relation 11795. Up to 5595 conditions per place. [2024-11-17 03:28:35,709 INFO L140 encePairwiseOnDemand]: 116/120 looper letters, 51 selfloop transitions, 2 changer transitions 0/112 dead transitions. [2024-11-17 03:28:35,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 112 transitions, 350 flow [2024-11-17 03:28:35,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:28:35,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:28:35,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 238 transitions. [2024-11-17 03:28:35,711 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6611111111111111 [2024-11-17 03:28:35,712 INFO L175 Difference]: Start difference. First operand has 104 places, 99 transitions, 218 flow. Second operand 3 states and 238 transitions. [2024-11-17 03:28:35,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 112 transitions, 350 flow [2024-11-17 03:28:35,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 112 transitions, 346 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:28:35,722 INFO L231 Difference]: Finished difference. Result has 105 places, 100 transitions, 228 flow [2024-11-17 03:28:35,723 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=228, PETRI_PLACES=105, PETRI_TRANSITIONS=100} [2024-11-17 03:28:35,725 INFO L277 CegarLoopForPetriNet]: 105 programPoint places, 0 predicate places. [2024-11-17 03:28:35,725 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 100 transitions, 228 flow [2024-11-17 03:28:35,726 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 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 03:28:35,726 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:28:35,726 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2024-11-17 03:28:35,726 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-17 03:28:35,727 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-17 03:28:35,727 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:28:35,727 INFO L85 PathProgramCache]: Analyzing trace with hash 2146567853, now seen corresponding path program 1 times [2024-11-17 03:28:35,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:28:35,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929764505] [2024-11-17 03:28:35,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:28:35,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:28:35,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:28:35,971 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 03:28:35,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:28:35,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929764505] [2024-11-17 03:28:35,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929764505] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:28:35,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226761708] [2024-11-17 03:28:35,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:28:35,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:28:35,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:28:35,975 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 03:28:35,977 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 03:28:36,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:28:36,057 INFO L255 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-17 03:28:36,059 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:28:36,074 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-17 03:28:36,147 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 03:28:36,147 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:28:36,210 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 03:28:36,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226761708] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:28:36,210 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:28:36,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2024-11-17 03:28:36,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38448900] [2024-11-17 03:28:36,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:28:36,211 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-17 03:28:36,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:28:36,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-17 03:28:36,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-11-17 03:28:36,431 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 120 [2024-11-17 03:28:36,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 100 transitions, 228 flow. Second operand has 9 states, 9 states have (on average 62.333333333333336) internal successors, (561), 9 states have internal predecessors, (561), 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 03:28:36,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:28:36,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 120 [2024-11-17 03:28:36,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:28:36,758 INFO L124 PetriNetUnfolderBase]: 957/2505 cut-off events. [2024-11-17 03:28:36,758 INFO L125 PetriNetUnfolderBase]: For 491/491 co-relation queries the response was YES. [2024-11-17 03:28:36,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4302 conditions, 2505 events. 957/2505 cut-off events. For 491/491 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 18539 event pairs, 264 based on Foata normal form. 312/2618 useless extension candidates. Maximal degree in co-relation 361. Up to 1224 conditions per place. [2024-11-17 03:28:36,774 INFO L140 encePairwiseOnDemand]: 116/120 looper letters, 63 selfloop transitions, 3 changer transitions 0/108 dead transitions. [2024-11-17 03:28:36,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 108 transitions, 366 flow [2024-11-17 03:28:36,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-17 03:28:36,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-17 03:28:36,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 370 transitions. [2024-11-17 03:28:36,776 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6166666666666667 [2024-11-17 03:28:36,776 INFO L175 Difference]: Start difference. First operand has 105 places, 100 transitions, 228 flow. Second operand 5 states and 370 transitions. [2024-11-17 03:28:36,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 108 transitions, 366 flow [2024-11-17 03:28:36,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 108 transitions, 364 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-17 03:28:36,779 INFO L231 Difference]: Finished difference. Result has 81 places, 71 transitions, 164 flow [2024-11-17 03:28:36,779 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=164, PETRI_PLACES=81, PETRI_TRANSITIONS=71} [2024-11-17 03:28:36,779 INFO L277 CegarLoopForPetriNet]: 105 programPoint places, -24 predicate places. [2024-11-17 03:28:36,780 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 71 transitions, 164 flow [2024-11-17 03:28:36,780 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 62.333333333333336) internal successors, (561), 9 states have internal predecessors, (561), 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 03:28:36,780 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:28:36,780 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:28:36,797 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-17 03:28:36,981 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-17 03:28:36,981 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-17 03:28:36,982 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:28:36,982 INFO L85 PathProgramCache]: Analyzing trace with hash 676681056, now seen corresponding path program 1 times [2024-11-17 03:28:36,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:28:36,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320146611] [2024-11-17 03:28:36,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:28:36,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:28:36,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:28:37,104 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 03:28:37,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:28:37,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320146611] [2024-11-17 03:28:37,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320146611] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:28:37,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:28:37,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-17 03:28:37,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54237897] [2024-11-17 03:28:37,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:28:37,106 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 03:28:37,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:28:37,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 03:28:37,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-17 03:28:37,164 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 120 [2024-11-17 03:28:37,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 71 transitions, 164 flow. Second operand has 4 states, 4 states have (on average 55.75) internal successors, (223), 4 states have internal predecessors, (223), 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 03:28:37,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:28:37,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 120 [2024-11-17 03:28:37,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:28:37,366 INFO L124 PetriNetUnfolderBase]: 957/2208 cut-off events. [2024-11-17 03:28:37,367 INFO L125 PetriNetUnfolderBase]: For 502/502 co-relation queries the response was YES. [2024-11-17 03:28:37,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4150 conditions, 2208 events. 957/2208 cut-off events. For 502/502 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 14895 event pairs, 957 based on Foata normal form. 0/2152 useless extension candidates. Maximal degree in co-relation 2844. Up to 1584 conditions per place. [2024-11-17 03:28:37,381 INFO L140 encePairwiseOnDemand]: 111/120 looper letters, 28 selfloop transitions, 1 changer transitions 0/63 dead transitions. [2024-11-17 03:28:37,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 63 transitions, 206 flow [2024-11-17 03:28:37,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:28:37,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:28:37,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 198 transitions. [2024-11-17 03:28:37,383 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-11-17 03:28:37,383 INFO L175 Difference]: Start difference. First operand has 81 places, 71 transitions, 164 flow. Second operand 3 states and 198 transitions. [2024-11-17 03:28:37,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 63 transitions, 206 flow [2024-11-17 03:28:37,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 63 transitions, 199 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-11-17 03:28:37,387 INFO L231 Difference]: Finished difference. Result has 72 places, 63 transitions, 143 flow [2024-11-17 03:28:37,387 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=141, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=143, PETRI_PLACES=72, PETRI_TRANSITIONS=63} [2024-11-17 03:28:37,388 INFO L277 CegarLoopForPetriNet]: 105 programPoint places, -33 predicate places. [2024-11-17 03:28:37,388 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 63 transitions, 143 flow [2024-11-17 03:28:37,389 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 55.75) internal successors, (223), 4 states have internal predecessors, (223), 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 03:28:37,389 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:28:37,389 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:28:37,389 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-17 03:28:37,389 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-17 03:28:37,391 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:28:37,391 INFO L85 PathProgramCache]: Analyzing trace with hash 676681057, now seen corresponding path program 1 times [2024-11-17 03:28:37,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:28:37,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267680227] [2024-11-17 03:28:37,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:28:37,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:28:37,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:28:37,517 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 03:28:37,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:28:37,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267680227] [2024-11-17 03:28:37,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267680227] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:28:37,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:28:37,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-17 03:28:37,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980488765] [2024-11-17 03:28:37,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:28:37,519 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 03:28:37,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:28:37,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 03:28:37,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-17 03:28:37,574 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 120 [2024-11-17 03:28:37,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 63 transitions, 143 flow. Second operand has 4 states, 4 states have (on average 57.75) internal successors, (231), 4 states have internal predecessors, (231), 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 03:28:37,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:28:37,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 120 [2024-11-17 03:28:37,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:28:37,725 INFO L124 PetriNetUnfolderBase]: 682/1571 cut-off events. [2024-11-17 03:28:37,726 INFO L125 PetriNetUnfolderBase]: For 204/204 co-relation queries the response was YES. [2024-11-17 03:28:37,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2924 conditions, 1571 events. 682/1571 cut-off events. For 204/204 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 9815 event pairs, 682 based on Foata normal form. 0/1519 useless extension candidates. Maximal degree in co-relation 2915. Up to 1152 conditions per place. [2024-11-17 03:28:37,733 INFO L140 encePairwiseOnDemand]: 111/120 looper letters, 27 selfloop transitions, 1 changer transitions 0/55 dead transitions. [2024-11-17 03:28:37,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 55 transitions, 183 flow [2024-11-17 03:28:37,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:28:37,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:28:37,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 203 transitions. [2024-11-17 03:28:37,735 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5638888888888889 [2024-11-17 03:28:37,735 INFO L175 Difference]: Start difference. First operand has 72 places, 63 transitions, 143 flow. Second operand 3 states and 203 transitions. [2024-11-17 03:28:37,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 55 transitions, 183 flow [2024-11-17 03:28:37,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 55 transitions, 182 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-17 03:28:37,737 INFO L231 Difference]: Finished difference. Result has 65 places, 55 transitions, 128 flow [2024-11-17 03:28:37,737 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=128, PETRI_PLACES=65, PETRI_TRANSITIONS=55} [2024-11-17 03:28:37,738 INFO L277 CegarLoopForPetriNet]: 105 programPoint places, -40 predicate places. [2024-11-17 03:28:37,738 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 55 transitions, 128 flow [2024-11-17 03:28:37,738 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 57.75) internal successors, (231), 4 states have internal predecessors, (231), 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 03:28:37,738 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:28:37,739 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1] [2024-11-17 03:28:37,739 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-17 03:28:37,739 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-17 03:28:37,739 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:28:37,739 INFO L85 PathProgramCache]: Analyzing trace with hash 2093234325, now seen corresponding path program 1 times [2024-11-17 03:28:37,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:28:37,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270031804] [2024-11-17 03:28:37,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:28:37,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:28:37,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-17 03:28:37,752 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-17 03:28:37,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-17 03:28:37,765 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-17 03:28:37,765 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-17 03:28:37,766 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (32 of 33 remaining) [2024-11-17 03:28:37,766 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 33 remaining) [2024-11-17 03:28:37,766 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 33 remaining) [2024-11-17 03:28:37,766 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 33 remaining) [2024-11-17 03:28:37,766 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 33 remaining) [2024-11-17 03:28:37,767 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 33 remaining) [2024-11-17 03:28:37,767 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 33 remaining) [2024-11-17 03:28:37,767 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (25 of 33 remaining) [2024-11-17 03:28:37,767 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK (24 of 33 remaining) [2024-11-17 03:28:37,767 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 33 remaining) [2024-11-17 03:28:37,767 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 33 remaining) [2024-11-17 03:28:37,767 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 33 remaining) [2024-11-17 03:28:37,767 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 33 remaining) [2024-11-17 03:28:37,768 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 33 remaining) [2024-11-17 03:28:37,768 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 33 remaining) [2024-11-17 03:28:37,768 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 33 remaining) [2024-11-17 03:28:37,768 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 33 remaining) [2024-11-17 03:28:37,768 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 33 remaining) [2024-11-17 03:28:37,768 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 33 remaining) [2024-11-17 03:28:37,768 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 33 remaining) [2024-11-17 03:28:37,769 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 33 remaining) [2024-11-17 03:28:37,769 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 33 remaining) [2024-11-17 03:28:37,769 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 33 remaining) [2024-11-17 03:28:37,769 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 33 remaining) [2024-11-17 03:28:37,769 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 33 remaining) [2024-11-17 03:28:37,769 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 33 remaining) [2024-11-17 03:28:37,769 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 33 remaining) [2024-11-17 03:28:37,769 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 33 remaining) [2024-11-17 03:28:37,770 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 33 remaining) [2024-11-17 03:28:37,770 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 33 remaining) [2024-11-17 03:28:37,770 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 33 remaining) [2024-11-17 03:28:37,770 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 33 remaining) [2024-11-17 03:28:37,770 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 33 remaining) [2024-11-17 03:28:37,770 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-17 03:28:37,771 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2024-11-17 03:28:37,771 WARN L244 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-17 03:28:37,771 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-11-17 03:28:37,795 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-17 03:28:37,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 139 places, 159 transitions, 345 flow [2024-11-17 03:28:37,826 INFO L124 PetriNetUnfolderBase]: 54/330 cut-off events. [2024-11-17 03:28:37,827 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-11-17 03:28:37,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 355 conditions, 330 events. 54/330 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1593 event pairs, 1 based on Foata normal form. 0/204 useless extension candidates. Maximal degree in co-relation 222. Up to 16 conditions per place. [2024-11-17 03:28:37,829 INFO L82 GeneralOperation]: Start removeDead. Operand has 139 places, 159 transitions, 345 flow [2024-11-17 03:28:37,832 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 139 places, 159 transitions, 345 flow [2024-11-17 03:28:37,833 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-17 03:28:37,834 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;@6b83867a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-17 03:28:37,834 INFO L334 AbstractCegarLoop]: Starting to check reachability of 41 error locations. [2024-11-17 03:28:37,836 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-17 03:28:37,836 INFO L124 PetriNetUnfolderBase]: 1/7 cut-off events. [2024-11-17 03:28:37,836 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-17 03:28:37,836 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:28:37,836 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-17 03:28:37,836 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2024-11-17 03:28:37,837 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:28:37,837 INFO L85 PathProgramCache]: Analyzing trace with hash 18768936, now seen corresponding path program 1 times [2024-11-17 03:28:37,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:28:37,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181401718] [2024-11-17 03:28:37,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:28:37,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:28:37,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:28:37,875 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 03:28:37,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:28:37,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181401718] [2024-11-17 03:28:37,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181401718] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:28:37,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:28:37,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-17 03:28:37,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123464000] [2024-11-17 03:28:37,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:28:37,877 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-17 03:28:37,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:28:37,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-17 03:28:37,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-17 03:28:37,909 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 159 [2024-11-17 03:28:37,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 159 transitions, 345 flow. Second operand has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 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 03:28:37,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:28:37,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 159 [2024-11-17 03:28:37,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:28:48,053 INFO L124 PetriNetUnfolderBase]: 62192/112856 cut-off events. [2024-11-17 03:28:48,054 INFO L125 PetriNetUnfolderBase]: For 1729/1729 co-relation queries the response was YES. [2024-11-17 03:28:48,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 200646 conditions, 112856 events. 62192/112856 cut-off events. For 1729/1729 co-relation queries the response was YES. Maximal size of possible extension queue 2838. Compared 1174685 event pairs, 50719 based on Foata normal form. 44830/151440 useless extension candidates. Maximal degree in co-relation 91411. Up to 70980 conditions per place. [2024-11-17 03:28:49,104 INFO L140 encePairwiseOnDemand]: 131/159 looper letters, 83 selfloop transitions, 2 changer transitions 0/165 dead transitions. [2024-11-17 03:28:49,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 165 transitions, 527 flow [2024-11-17 03:28:49,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:28:49,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:28:49,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 369 transitions. [2024-11-17 03:28:49,107 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7735849056603774 [2024-11-17 03:28:49,107 INFO L175 Difference]: Start difference. First operand has 139 places, 159 transitions, 345 flow. Second operand 3 states and 369 transitions. [2024-11-17 03:28:49,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 165 transitions, 527 flow [2024-11-17 03:28:49,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 165 transitions, 527 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-17 03:28:49,114 INFO L231 Difference]: Finished difference. Result has 138 places, 132 transitions, 295 flow [2024-11-17 03:28:49,115 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=291, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=295, PETRI_PLACES=138, PETRI_TRANSITIONS=132} [2024-11-17 03:28:49,116 INFO L277 CegarLoopForPetriNet]: 139 programPoint places, -1 predicate places. [2024-11-17 03:28:49,116 INFO L471 AbstractCegarLoop]: Abstraction has has 138 places, 132 transitions, 295 flow [2024-11-17 03:28:49,116 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 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 03:28:49,116 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:28:49,116 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-17 03:28:49,116 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-17 03:28:49,117 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2024-11-17 03:28:49,117 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:28:49,117 INFO L85 PathProgramCache]: Analyzing trace with hash 18768937, now seen corresponding path program 1 times [2024-11-17 03:28:49,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:28:49,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501746383] [2024-11-17 03:28:49,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:28:49,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:28:49,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:28:49,177 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 03:28:49,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:28:49,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501746383] [2024-11-17 03:28:49,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501746383] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:28:49,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:28:49,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-17 03:28:49,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403053274] [2024-11-17 03:28:49,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:28:49,179 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-17 03:28:49,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:28:49,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-17 03:28:49,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-17 03:28:49,211 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 159 [2024-11-17 03:28:49,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 132 transitions, 295 flow. Second operand has 3 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 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 03:28:49,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:28:49,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 159 [2024-11-17 03:28:49,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:28:59,336 INFO L124 PetriNetUnfolderBase]: 66485/125399 cut-off events. [2024-11-17 03:28:59,337 INFO L125 PetriNetUnfolderBase]: For 4775/4775 co-relation queries the response was YES. [2024-11-17 03:28:59,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 221323 conditions, 125399 events. 66485/125399 cut-off events. For 4775/4775 co-relation queries the response was YES. Maximal size of possible extension queue 2894. Compared 1372352 event pairs, 43084 based on Foata normal form. 1/115658 useless extension candidates. Maximal degree in co-relation 183712. Up to 92470 conditions per place. [2024-11-17 03:29:00,207 INFO L140 encePairwiseOnDemand]: 155/159 looper letters, 64 selfloop transitions, 2 changer transitions 0/145 dead transitions. [2024-11-17 03:29:00,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 145 transitions, 453 flow [2024-11-17 03:29:00,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:29:00,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:29:00,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 311 transitions. [2024-11-17 03:29:00,209 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6519916142557652 [2024-11-17 03:29:00,210 INFO L175 Difference]: Start difference. First operand has 138 places, 132 transitions, 295 flow. Second operand 3 states and 311 transitions. [2024-11-17 03:29:00,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 145 transitions, 453 flow [2024-11-17 03:29:00,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 145 transitions, 449 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:29:00,506 INFO L231 Difference]: Finished difference. Result has 139 places, 133 transitions, 305 flow [2024-11-17 03:29:00,506 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=291, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=305, PETRI_PLACES=139, PETRI_TRANSITIONS=133} [2024-11-17 03:29:00,506 INFO L277 CegarLoopForPetriNet]: 139 programPoint places, 0 predicate places. [2024-11-17 03:29:00,507 INFO L471 AbstractCegarLoop]: Abstraction has has 139 places, 133 transitions, 305 flow [2024-11-17 03:29:00,507 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 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 03:29:00,507 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:29:00,507 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2024-11-17 03:29:00,507 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-17 03:29:00,507 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2024-11-17 03:29:00,508 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:29:00,508 INFO L85 PathProgramCache]: Analyzing trace with hash 280223089, now seen corresponding path program 1 times [2024-11-17 03:29:00,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:29:00,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829031374] [2024-11-17 03:29:00,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:29:00,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:29:00,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:29:00,611 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 03:29:00,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:29:00,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829031374] [2024-11-17 03:29:00,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829031374] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:29:00,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175991708] [2024-11-17 03:29:00,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:29:00,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:29:00,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:29:00,615 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 03:29:00,616 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 03:29:00,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:29:00,697 INFO L255 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-17 03:29:00,698 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:29:00,710 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-17 03:29:00,773 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 03:29:00,773 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:29:00,836 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 03:29:00,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175991708] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:29:00,837 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:29:00,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2024-11-17 03:29:00,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416652043] [2024-11-17 03:29:00,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:29:00,838 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-17 03:29:00,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:29:00,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-17 03:29:00,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-11-17 03:29:01,026 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 159 [2024-11-17 03:29:01,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 133 transitions, 305 flow. Second operand has 9 states, 9 states have (on average 82.33333333333333) internal successors, (741), 9 states have internal predecessors, (741), 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 03:29:01,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:29:01,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 159 [2024-11-17 03:29:01,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:29:03,696 INFO L124 PetriNetUnfolderBase]: 18381/35530 cut-off events. [2024-11-17 03:29:03,696 INFO L125 PetriNetUnfolderBase]: For 6967/6967 co-relation queries the response was YES. [2024-11-17 03:29:03,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63968 conditions, 35530 events. 18381/35530 cut-off events. For 6967/6967 co-relation queries the response was YES. Maximal size of possible extension queue 927. Compared 340174 event pairs, 3020 based on Foata normal form. 3768/37325 useless extension candidates. Maximal degree in co-relation 58434. Up to 19440 conditions per place. [2024-11-17 03:29:04,235 INFO L140 encePairwiseOnDemand]: 155/159 looper letters, 110 selfloop transitions, 4 changer transitions 0/176 dead transitions. [2024-11-17 03:29:04,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 176 transitions, 608 flow [2024-11-17 03:29:04,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-17 03:29:04,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-17 03:29:04,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 600 transitions. [2024-11-17 03:29:04,238 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6289308176100629 [2024-11-17 03:29:04,238 INFO L175 Difference]: Start difference. First operand has 139 places, 133 transitions, 305 flow. Second operand 6 states and 600 transitions. [2024-11-17 03:29:04,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 176 transitions, 608 flow [2024-11-17 03:29:04,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 176 transitions, 604 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-17 03:29:04,242 INFO L231 Difference]: Finished difference. Result has 116 places, 104 transitions, 240 flow [2024-11-17 03:29:04,242 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=240, PETRI_PLACES=116, PETRI_TRANSITIONS=104} [2024-11-17 03:29:04,242 INFO L277 CegarLoopForPetriNet]: 139 programPoint places, -23 predicate places. [2024-11-17 03:29:04,243 INFO L471 AbstractCegarLoop]: Abstraction has has 116 places, 104 transitions, 240 flow [2024-11-17 03:29:04,243 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 82.33333333333333) internal successors, (741), 9 states have internal predecessors, (741), 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 03:29:04,243 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:29:04,243 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:29:04,257 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-17 03:29:04,444 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:29:04,444 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2024-11-17 03:29:04,445 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:29:04,445 INFO L85 PathProgramCache]: Analyzing trace with hash 393289444, now seen corresponding path program 1 times [2024-11-17 03:29:04,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:29:04,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005174608] [2024-11-17 03:29:04,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:29:04,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:29:04,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:29:04,522 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 03:29:04,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:29:04,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005174608] [2024-11-17 03:29:04,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005174608] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:29:04,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:29:04,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-17 03:29:04,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662318913] [2024-11-17 03:29:04,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:29:04,524 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 03:29:04,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:29:04,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 03:29:04,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-17 03:29:04,619 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 159 [2024-11-17 03:29:04,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 104 transitions, 240 flow. Second operand has 4 states, 4 states have (on average 71.75) internal successors, (287), 4 states have internal predecessors, (287), 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 03:29:04,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:29:04,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 159 [2024-11-17 03:29:04,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:29:07,207 INFO L124 PetriNetUnfolderBase]: 18381/32924 cut-off events. [2024-11-17 03:29:07,208 INFO L125 PetriNetUnfolderBase]: For 6414/6414 co-relation queries the response was YES. [2024-11-17 03:29:07,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63091 conditions, 32924 events. 18381/32924 cut-off events. For 6414/6414 co-relation queries the response was YES. Maximal size of possible extension queue 836. Compared 289164 event pairs, 18381 based on Foata normal form. 0/32042 useless extension candidates. Maximal degree in co-relation 46564. Up to 25920 conditions per place. [2024-11-17 03:29:07,362 INFO L140 encePairwiseOnDemand]: 146/159 looper letters, 41 selfloop transitions, 1 changer transitions 0/92 dead transitions. [2024-11-17 03:29:07,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 92 transitions, 300 flow [2024-11-17 03:29:07,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:29:07,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:29:07,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 262 transitions. [2024-11-17 03:29:07,363 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.549266247379455 [2024-11-17 03:29:07,363 INFO L175 Difference]: Start difference. First operand has 116 places, 104 transitions, 240 flow. Second operand 3 states and 262 transitions. [2024-11-17 03:29:07,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 92 transitions, 300 flow [2024-11-17 03:29:07,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 92 transitions, 291 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-11-17 03:29:07,367 INFO L231 Difference]: Finished difference. Result has 103 places, 92 transitions, 209 flow [2024-11-17 03:29:07,367 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=207, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=209, PETRI_PLACES=103, PETRI_TRANSITIONS=92} [2024-11-17 03:29:07,367 INFO L277 CegarLoopForPetriNet]: 139 programPoint places, -36 predicate places. [2024-11-17 03:29:07,368 INFO L471 AbstractCegarLoop]: Abstraction has has 103 places, 92 transitions, 209 flow [2024-11-17 03:29:07,368 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 71.75) internal successors, (287), 4 states have internal predecessors, (287), 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 03:29:07,368 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:29:07,368 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:29:07,368 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-17 03:29:07,368 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2024-11-17 03:29:07,368 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:29:07,369 INFO L85 PathProgramCache]: Analyzing trace with hash 393289445, now seen corresponding path program 1 times [2024-11-17 03:29:07,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:29:07,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577281595] [2024-11-17 03:29:07,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:29:07,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:29:07,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:29:07,478 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 03:29:07,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:29:07,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577281595] [2024-11-17 03:29:07,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577281595] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:29:07,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:29:07,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-17 03:29:07,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738151751] [2024-11-17 03:29:07,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:29:07,481 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 03:29:07,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:29:07,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 03:29:07,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-17 03:29:07,547 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 159 [2024-11-17 03:29:07,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 92 transitions, 209 flow. Second operand has 4 states, 4 states have (on average 73.75) internal successors, (295), 4 states have internal predecessors, (295), 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 03:29:07,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:29:07,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 159 [2024-11-17 03:29:07,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:29:09,327 INFO L124 PetriNetUnfolderBase]: 13354/23647 cut-off events. [2024-11-17 03:29:09,327 INFO L125 PetriNetUnfolderBase]: For 2716/2716 co-relation queries the response was YES. [2024-11-17 03:29:09,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45017 conditions, 23647 events. 13354/23647 cut-off events. For 2716/2716 co-relation queries the response was YES. Maximal size of possible extension queue 613. Compared 196749 event pairs, 13354 based on Foata normal form. 0/22924 useless extension candidates. Maximal degree in co-relation 45007. Up to 19008 conditions per place. [2024-11-17 03:29:09,424 INFO L140 encePairwiseOnDemand]: 146/159 looper letters, 40 selfloop transitions, 1 changer transitions 0/80 dead transitions. [2024-11-17 03:29:09,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 80 transitions, 267 flow [2024-11-17 03:29:09,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:29:09,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:29:09,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 267 transitions. [2024-11-17 03:29:09,425 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.559748427672956 [2024-11-17 03:29:09,425 INFO L175 Difference]: Start difference. First operand has 103 places, 92 transitions, 209 flow. Second operand 3 states and 267 transitions. [2024-11-17 03:29:09,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 80 transitions, 267 flow [2024-11-17 03:29:09,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 80 transitions, 266 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-17 03:29:09,428 INFO L231 Difference]: Finished difference. Result has 92 places, 80 transitions, 186 flow [2024-11-17 03:29:09,428 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=186, PETRI_PLACES=92, PETRI_TRANSITIONS=80} [2024-11-17 03:29:09,429 INFO L277 CegarLoopForPetriNet]: 139 programPoint places, -47 predicate places. [2024-11-17 03:29:09,429 INFO L471 AbstractCegarLoop]: Abstraction has has 92 places, 80 transitions, 186 flow [2024-11-17 03:29:09,429 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 73.75) internal successors, (295), 4 states have internal predecessors, (295), 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 03:29:09,429 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:29:09,429 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1] [2024-11-17 03:29:09,429 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-17 03:29:09,429 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2024-11-17 03:29:09,430 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:29:09,430 INFO L85 PathProgramCache]: Analyzing trace with hash -1894185935, now seen corresponding path program 1 times [2024-11-17 03:29:09,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:29:09,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351469689] [2024-11-17 03:29:09,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:29:09,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:29:09,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-17 03:29:09,446 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-17 03:29:09,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-17 03:29:09,459 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-17 03:29:09,459 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-17 03:29:09,460 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (40 of 41 remaining) [2024-11-17 03:29:09,460 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 41 remaining) [2024-11-17 03:29:09,460 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 41 remaining) [2024-11-17 03:29:09,460 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 41 remaining) [2024-11-17 03:29:09,460 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 41 remaining) [2024-11-17 03:29:09,460 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 41 remaining) [2024-11-17 03:29:09,461 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 41 remaining) [2024-11-17 03:29:09,461 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (33 of 41 remaining) [2024-11-17 03:29:09,461 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK (32 of 41 remaining) [2024-11-17 03:29:09,461 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 41 remaining) [2024-11-17 03:29:09,461 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 41 remaining) [2024-11-17 03:29:09,461 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 41 remaining) [2024-11-17 03:29:09,462 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 41 remaining) [2024-11-17 03:29:09,462 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 41 remaining) [2024-11-17 03:29:09,462 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 41 remaining) [2024-11-17 03:29:09,462 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 41 remaining) [2024-11-17 03:29:09,462 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 41 remaining) [2024-11-17 03:29:09,462 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 41 remaining) [2024-11-17 03:29:09,462 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 41 remaining) [2024-11-17 03:29:09,462 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 41 remaining) [2024-11-17 03:29:09,463 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 41 remaining) [2024-11-17 03:29:09,463 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 41 remaining) [2024-11-17 03:29:09,463 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 41 remaining) [2024-11-17 03:29:09,463 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 41 remaining) [2024-11-17 03:29:09,463 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 41 remaining) [2024-11-17 03:29:09,463 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 41 remaining) [2024-11-17 03:29:09,463 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 41 remaining) [2024-11-17 03:29:09,463 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 41 remaining) [2024-11-17 03:29:09,464 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 41 remaining) [2024-11-17 03:29:09,464 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 41 remaining) [2024-11-17 03:29:09,464 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 41 remaining) [2024-11-17 03:29:09,464 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 41 remaining) [2024-11-17 03:29:09,464 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 41 remaining) [2024-11-17 03:29:09,464 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 41 remaining) [2024-11-17 03:29:09,464 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 41 remaining) [2024-11-17 03:29:09,465 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 41 remaining) [2024-11-17 03:29:09,465 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 41 remaining) [2024-11-17 03:29:09,465 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 41 remaining) [2024-11-17 03:29:09,465 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 41 remaining) [2024-11-17 03:29:09,465 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 41 remaining) [2024-11-17 03:29:09,465 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 41 remaining) [2024-11-17 03:29:09,465 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-17 03:29:09,465 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2024-11-17 03:29:09,466 WARN L244 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-17 03:29:09,466 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2024-11-17 03:29:09,499 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-11-17 03:29:09,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 173 places, 198 transitions, 436 flow [2024-11-17 03:29:09,547 INFO L124 PetriNetUnfolderBase]: 86/505 cut-off events. [2024-11-17 03:29:09,547 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2024-11-17 03:29:09,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 556 conditions, 505 events. 86/505 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 2643 event pairs, 6 based on Foata normal form. 0/314 useless extension candidates. Maximal degree in co-relation 354. Up to 32 conditions per place. [2024-11-17 03:29:09,552 INFO L82 GeneralOperation]: Start removeDead. Operand has 173 places, 198 transitions, 436 flow [2024-11-17 03:29:09,558 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 173 places, 198 transitions, 436 flow [2024-11-17 03:29:09,561 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-17 03:29:09,561 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;@6b83867a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-17 03:29:09,561 INFO L334 AbstractCegarLoop]: Starting to check reachability of 49 error locations. [2024-11-17 03:29:09,563 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-17 03:29:09,563 INFO L124 PetriNetUnfolderBase]: 1/7 cut-off events. [2024-11-17 03:29:09,563 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-17 03:29:09,563 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:29:09,563 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-17 03:29:09,563 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2024-11-17 03:29:09,564 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:29:09,564 INFO L85 PathProgramCache]: Analyzing trace with hash 24864168, now seen corresponding path program 1 times [2024-11-17 03:29:09,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:29:09,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032973491] [2024-11-17 03:29:09,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:29:09,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:29:09,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:29:09,589 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 03:29:09,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:29:09,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032973491] [2024-11-17 03:29:09,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032973491] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:29:09,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:29:09,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-17 03:29:09,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636288121] [2024-11-17 03:29:09,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:29:09,591 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-17 03:29:09,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:29:09,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-17 03:29:09,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-17 03:29:09,626 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 198 [2024-11-17 03:29:09,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 198 transitions, 436 flow. Second operand has 3 states, 3 states have (on average 101.0) internal successors, (303), 3 states have internal predecessors, (303), 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 03:29:09,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:29:09,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 198 [2024-11-17 03:29:09,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand