./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/goblint-regression/28-race_reach_28-funptr_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 023d838f 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_28-funptr_racefree.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 3e2d1ca14c91be6e836759580a015ed2d4b9eb8ea9888f9f925ea579405b630f --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-023d838-m [2024-11-10 18:08:54,379 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-10 18:08:54,458 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-10 18:08:54,464 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-10 18:08:54,467 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-10 18:08:54,496 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-10 18:08:54,498 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-10 18:08:54,498 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-10 18:08:54,499 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-10 18:08:54,500 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-10 18:08:54,501 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-10 18:08:54,502 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-10 18:08:54,502 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-10 18:08:54,503 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-10 18:08:54,503 INFO L153 SettingsManager]: * Use SBE=true [2024-11-10 18:08:54,505 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-10 18:08:54,505 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-10 18:08:54,505 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-10 18:08:54,506 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-10 18:08:54,506 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-10 18:08:54,508 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-10 18:08:54,509 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-10 18:08:54,509 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-10 18:08:54,510 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-10 18:08:54,510 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-10 18:08:54,510 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-10 18:08:54,510 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-10 18:08:54,511 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-10 18:08:54,511 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-10 18:08:54,511 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-10 18:08:54,511 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-10 18:08:54,512 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-10 18:08:54,512 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-10 18:08:54,512 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-10 18:08:54,513 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-10 18:08:54,513 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-10 18:08:54,513 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-10 18:08:54,513 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-10 18:08:54,514 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-10 18:08:54,515 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-10 18:08:54,515 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-10 18:08:54,515 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-10 18:08:54,515 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3e2d1ca14c91be6e836759580a015ed2d4b9eb8ea9888f9f925ea579405b630f [2024-11-10 18:08:54,816 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-10 18:08:54,838 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-10 18:08:54,841 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-10 18:08:54,842 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-10 18:08:54,843 INFO L274 PluginConnector]: CDTParser initialized [2024-11-10 18:08:54,844 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/28-race_reach_28-funptr_racefree.i [2024-11-10 18:08:56,354 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-10 18:08:56,697 INFO L384 CDTParser]: Found 1 translation units. [2024-11-10 18:08:56,699 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_28-funptr_racefree.i [2024-11-10 18:08:56,723 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/858156952/8767628d056a48bca572109429e9adb3/FLAG32204b21e [2024-11-10 18:08:56,966 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/858156952/8767628d056a48bca572109429e9adb3 [2024-11-10 18:08:56,969 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-10 18:08:56,971 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-10 18:08:56,972 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-10 18:08:56,973 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-10 18:08:56,978 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-10 18:08:56,978 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 06:08:56" (1/1) ... [2024-11-10 18:08:56,979 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@232d17a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:08:56, skipping insertion in model container [2024-11-10 18:08:56,979 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 06:08:56" (1/1) ... [2024-11-10 18:08:57,025 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-10 18:08:57,517 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-10 18:08:57,547 INFO L200 MainTranslator]: Completed pre-run [2024-11-10 18:08:57,619 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-10 18:08:57,687 INFO L204 MainTranslator]: Completed translation [2024-11-10 18:08:57,688 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:08:57 WrapperNode [2024-11-10 18:08:57,689 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-10 18:08:57,690 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-10 18:08:57,690 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-10 18:08:57,690 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-10 18:08:57,697 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:08:57" (1/1) ... [2024-11-10 18:08:57,722 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:08:57" (1/1) ... [2024-11-10 18:08:57,758 INFO L138 Inliner]: procedures = 252, calls = 52, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 137 [2024-11-10 18:08:57,759 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-10 18:08:57,760 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-10 18:08:57,760 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-10 18:08:57,760 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-10 18:08:57,771 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:08:57" (1/1) ... [2024-11-10 18:08:57,772 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:08:57" (1/1) ... [2024-11-10 18:08:57,775 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:08:57" (1/1) ... [2024-11-10 18:08:57,807 INFO L175 MemorySlicer]: Split 19 memory accesses to 5 slices as follows [2, 5, 5, 5, 2]. 26 percent of accesses are in the largest equivalence class. The 17 initializations are split as follows [2, 5, 5, 5, 0]. The 1 writes are split as follows [0, 0, 0, 0, 1]. [2024-11-10 18:08:57,808 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:08:57" (1/1) ... [2024-11-10 18:08:57,808 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:08:57" (1/1) ... [2024-11-10 18:08:57,822 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:08:57" (1/1) ... [2024-11-10 18:08:57,823 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:08:57" (1/1) ... [2024-11-10 18:08:57,825 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:08:57" (1/1) ... [2024-11-10 18:08:57,829 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:08:57" (1/1) ... [2024-11-10 18:08:57,836 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-10 18:08:57,837 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-10 18:08:57,837 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-10 18:08:57,837 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-10 18:08:57,838 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:08:57" (1/1) ... [2024-11-10 18:08:57,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-10 18:08:57,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:08:57,878 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) [2024-11-10 18:08:57,887 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 [2024-11-10 18:08:57,938 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-10 18:08:57,938 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-10 18:08:57,938 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-11-10 18:08:57,939 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-10 18:08:57,939 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-10 18:08:57,939 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-10 18:08:57,939 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-10 18:08:57,939 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-11-10 18:08:57,939 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-10 18:08:57,940 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-10 18:08:57,940 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-10 18:08:57,941 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-10 18:08:57,941 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-11-10 18:08:57,941 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-11-10 18:08:57,941 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-10 18:08:57,942 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2024-11-10 18:08:57,942 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2024-11-10 18:08:57,942 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-10 18:08:57,942 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-10 18:08:57,942 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-10 18:08:57,942 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-10 18:08:57,942 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-11-10 18:08:57,942 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-10 18:08:57,942 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-10 18:08:57,946 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-10 18:08:58,143 INFO L256 CfgBuilder]: Building ICFG [2024-11-10 18:08:58,146 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-10 18:08:58,333 INFO L1247 $ProcedureCfgBuilder]: dead code at ProgramPoint L911: havoc main_~#t_ids~0#1.base, main_~#t_ids~0#1.offset; [2024-11-10 18:08:58,334 INFO L1247 $ProcedureCfgBuilder]: dead code at ProgramPoint L911-1: SUMMARY for call ULTIMATE.dealloc(main_~#t_ids~0#1.base, main_~#t_ids~0#1.offset); srcloc: null [2024-11-10 18:08:58,400 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-10 18:08:58,403 INFO L307 CfgBuilder]: Performing block encoding [2024-11-10 18:08:58,563 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-10 18:08:58,564 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-10 18:08:58,564 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 06:08:58 BoogieIcfgContainer [2024-11-10 18:08:58,564 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-10 18:08:58,568 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-10 18:08:58,569 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-10 18:08:58,572 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-10 18:08:58,572 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.11 06:08:56" (1/3) ... [2024-11-10 18:08:58,573 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13327885 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 06:08:58, skipping insertion in model container [2024-11-10 18:08:58,573 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:08:57" (2/3) ... [2024-11-10 18:08:58,574 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13327885 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 06:08:58, skipping insertion in model container [2024-11-10 18:08:58,574 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 06:08:58" (3/3) ... [2024-11-10 18:08:58,576 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_28-funptr_racefree.i [2024-11-10 18:08:58,594 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-10 18:08:58,595 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2024-11-10 18:08:58,595 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-10 18:08:58,648 INFO L143 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2024-11-10 18:08:58,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 67 places, 77 transitions, 161 flow [2024-11-10 18:08:58,731 INFO L124 PetriNetUnfolderBase]: 19/119 cut-off events. [2024-11-10 18:08:58,732 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-10 18:08:58,737 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 13. Compared 403 event pairs, 0 based on Foata normal form. 0/85 useless extension candidates. Maximal degree in co-relation 72. Up to 4 conditions per place. [2024-11-10 18:08:58,737 INFO L82 GeneralOperation]: Start removeDead. Operand has 67 places, 77 transitions, 161 flow [2024-11-10 18:08:58,742 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 67 places, 77 transitions, 161 flow [2024-11-10 18:08:58,752 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-10 18:08:58,758 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;@3a2a6b38, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-10 18:08:58,759 INFO L334 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-11-10 18:08:58,763 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-10 18:08:58,763 INFO L124 PetriNetUnfolderBase]: 1/7 cut-off events. [2024-11-10 18:08:58,764 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-10 18:08:58,764 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:08:58,765 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-10 18:08:58,765 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK (and 4 more)] === [2024-11-10 18:08:58,770 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:08:58,771 INFO L85 PathProgramCache]: Analyzing trace with hash 11381080, now seen corresponding path program 1 times [2024-11-10 18:08:58,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:08:58,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316010061] [2024-11-10 18:08:58,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:08:58,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:08:58,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:08:59,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:08:59,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:08:59,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316010061] [2024-11-10 18:08:59,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316010061] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:08:59,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:08:59,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-10 18:08:59,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022311143] [2024-11-10 18:08:59,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:08:59,099 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 18:08:59,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:08:59,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 18:08:59,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 18:08:59,144 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 77 [2024-11-10 18:08:59,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 77 transitions, 161 flow. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 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) [2024-11-10 18:08:59,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:08:59,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 77 [2024-11-10 18:08:59,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:08:59,561 INFO L124 PetriNetUnfolderBase]: 239/771 cut-off events. [2024-11-10 18:08:59,562 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-10 18:08:59,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1304 conditions, 771 events. 239/771 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 4300 event pairs, 210 based on Foata normal form. 200/947 useless extension candidates. Maximal degree in co-relation 1240. Up to 467 conditions per place. [2024-11-10 18:08:59,572 INFO L140 encePairwiseOnDemand]: 61/77 looper letters, 46 selfloop transitions, 2 changer transitions 1/76 dead transitions. [2024-11-10 18:08:59,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 76 transitions, 257 flow [2024-11-10 18:08:59,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 18:08:59,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 18:08:59,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 150 transitions. [2024-11-10 18:08:59,589 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6493506493506493 [2024-11-10 18:08:59,591 INFO L175 Difference]: Start difference. First operand has 67 places, 77 transitions, 161 flow. Second operand 3 states and 150 transitions. [2024-11-10 18:08:59,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 76 transitions, 257 flow [2024-11-10 18:08:59,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 76 transitions, 257 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-10 18:08:59,602 INFO L231 Difference]: Finished difference. Result has 66 places, 61 transitions, 133 flow [2024-11-10 18:08:59,604 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=131, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=133, PETRI_PLACES=66, PETRI_TRANSITIONS=61} [2024-11-10 18:08:59,608 INFO L277 CegarLoopForPetriNet]: 67 programPoint places, -1 predicate places. [2024-11-10 18:08:59,609 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 61 transitions, 133 flow [2024-11-10 18:08:59,610 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 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) [2024-11-10 18:08:59,610 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:08:59,610 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-10 18:08:59,610 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-10 18:08:59,611 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK (and 4 more)] === [2024-11-10 18:08:59,612 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:08:59,612 INFO L85 PathProgramCache]: Analyzing trace with hash 11381081, now seen corresponding path program 1 times [2024-11-10 18:08:59,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:08:59,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96134399] [2024-11-10 18:08:59,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:08:59,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:08:59,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:08:59,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:08:59,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:08:59,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96134399] [2024-11-10 18:08:59,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96134399] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:08:59,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:08:59,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-10 18:08:59,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305331712] [2024-11-10 18:08:59,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:08:59,832 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 18:08:59,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:08:59,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 18:08:59,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 18:08:59,853 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 77 [2024-11-10 18:08:59,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 61 transitions, 133 flow. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:08:59,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:08:59,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 77 [2024-11-10 18:08:59,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:09:00,040 INFO L124 PetriNetUnfolderBase]: 238/785 cut-off events. [2024-11-10 18:09:00,040 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2024-11-10 18:09:00,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1322 conditions, 785 events. 238/785 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 4435 event pairs, 0 based on Foata normal form. 1/733 useless extension candidates. Maximal degree in co-relation 1278. Up to 497 conditions per place. [2024-11-10 18:09:00,052 INFO L140 encePairwiseOnDemand]: 73/77 looper letters, 48 selfloop transitions, 2 changer transitions 0/76 dead transitions. [2024-11-10 18:09:00,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 76 transitions, 263 flow [2024-11-10 18:09:00,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 18:09:00,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 18:09:00,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 136 transitions. [2024-11-10 18:09:00,056 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5887445887445888 [2024-11-10 18:09:00,057 INFO L175 Difference]: Start difference. First operand has 66 places, 61 transitions, 133 flow. Second operand 3 states and 136 transitions. [2024-11-10 18:09:00,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 76 transitions, 263 flow [2024-11-10 18:09:00,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 76 transitions, 259 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-10 18:09:00,063 INFO L231 Difference]: Finished difference. Result has 66 places, 61 transitions, 139 flow [2024-11-10 18:09:00,064 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=139, PETRI_PLACES=66, PETRI_TRANSITIONS=61} [2024-11-10 18:09:00,064 INFO L277 CegarLoopForPetriNet]: 67 programPoint places, -1 predicate places. [2024-11-10 18:09:00,065 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 61 transitions, 139 flow [2024-11-10 18:09:00,066 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:09:00,066 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:09:00,067 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2024-11-10 18:09:00,067 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-10 18:09:00,068 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK (and 4 more)] === [2024-11-10 18:09:00,068 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:09:00,070 INFO L85 PathProgramCache]: Analyzing trace with hash 1884895352, now seen corresponding path program 1 times [2024-11-10 18:09:00,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:09:00,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398723234] [2024-11-10 18:09:00,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:09:00,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:09:00,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:09:00,273 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:09:00,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:09:00,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398723234] [2024-11-10 18:09:00,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398723234] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:09:00,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273399202] [2024-11-10 18:09:00,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:09:00,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:09:00,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:09:00,279 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) [2024-11-10 18:09:00,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-10 18:09:00,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:09:00,384 INFO L255 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-10 18:09:00,389 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:09:00,455 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 [2024-11-10 18:09:00,570 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:09:00,571 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:09:00,677 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:09:00,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273399202] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:09:00,678 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:09:00,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2024-11-10 18:09:00,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377464892] [2024-11-10 18:09:00,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:09:00,679 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-10 18:09:00,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:09:00,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-10 18:09:00,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-11-10 18:09:00,749 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 77 [2024-11-10 18:09:00,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 61 transitions, 139 flow. Second operand has 9 states, 9 states have (on average 29.333333333333332) internal successors, (264), 9 states have internal predecessors, (264), 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) [2024-11-10 18:09:00,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:09:00,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 77 [2024-11-10 18:09:00,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:09:00,856 INFO L124 PetriNetUnfolderBase]: 42/145 cut-off events. [2024-11-10 18:09:00,857 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2024-11-10 18:09:00,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 288 conditions, 145 events. 42/145 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 442 event pairs, 0 based on Foata normal form. 30/172 useless extension candidates. Maximal degree in co-relation 256. Up to 87 conditions per place. [2024-11-10 18:09:00,858 INFO L140 encePairwiseOnDemand]: 73/77 looper letters, 33 selfloop transitions, 2 changer transitions 0/46 dead transitions. [2024-11-10 18:09:00,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 46 transitions, 172 flow [2024-11-10 18:09:00,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-10 18:09:00,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-10 18:09:00,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 145 transitions. [2024-11-10 18:09:00,860 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4707792207792208 [2024-11-10 18:09:00,860 INFO L175 Difference]: Start difference. First operand has 66 places, 61 transitions, 139 flow. Second operand 4 states and 145 transitions. [2024-11-10 18:09:00,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 46 transitions, 172 flow [2024-11-10 18:09:00,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 46 transitions, 166 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-10 18:09:00,862 INFO L231 Difference]: Finished difference. Result has 36 places, 30 transitions, 68 flow [2024-11-10 18:09:00,862 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=68, PETRI_PLACES=36, PETRI_TRANSITIONS=30} [2024-11-10 18:09:00,863 INFO L277 CegarLoopForPetriNet]: 67 programPoint places, -31 predicate places. [2024-11-10 18:09:00,863 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 30 transitions, 68 flow [2024-11-10 18:09:00,864 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 29.333333333333332) internal successors, (264), 9 states have internal predecessors, (264), 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) [2024-11-10 18:09:00,864 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:09:00,864 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1] [2024-11-10 18:09:00,884 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-10 18:09:01,068 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 [2024-11-10 18:09:01,069 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK (and 4 more)] === [2024-11-10 18:09:01,070 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:09:01,070 INFO L85 PathProgramCache]: Analyzing trace with hash -1697785915, now seen corresponding path program 1 times [2024-11-10 18:09:01,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:09:01,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062216980] [2024-11-10 18:09:01,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:09:01,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:09:01,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-10 18:09:01,091 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-10 18:09:01,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-10 18:09:01,132 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-10 18:09:01,132 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-10 18:09:01,133 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2024-11-10 18:09:01,135 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2024-11-10 18:09:01,136 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2024-11-10 18:09:01,136 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK (3 of 7 remaining) [2024-11-10 18:09:01,136 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2024-11-10 18:09:01,136 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 7 remaining) [2024-11-10 18:09:01,137 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2024-11-10 18:09:01,137 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-10 18:09:01,137 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2024-11-10 18:09:01,140 WARN L244 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-10 18:09:01,140 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-11-10 18:09:01,162 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-10 18:09:01,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 93 places, 108 transitions, 232 flow [2024-11-10 18:09:01,184 INFO L124 PetriNetUnfolderBase]: 34/207 cut-off events. [2024-11-10 18:09:01,184 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-10 18:09:01,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 219 conditions, 207 events. 34/207 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 845 event pairs, 0 based on Foata normal form. 0/148 useless extension candidates. Maximal degree in co-relation 123. Up to 8 conditions per place. [2024-11-10 18:09:01,186 INFO L82 GeneralOperation]: Start removeDead. Operand has 93 places, 108 transitions, 232 flow [2024-11-10 18:09:01,188 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 93 places, 108 transitions, 232 flow [2024-11-10 18:09:01,193 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-10 18:09:01,194 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;@3a2a6b38, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-10 18:09:01,194 INFO L334 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-11-10 18:09:01,196 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-10 18:09:01,196 INFO L124 PetriNetUnfolderBase]: 1/7 cut-off events. [2024-11-10 18:09:01,196 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-10 18:09:01,196 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:09:01,196 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-10 18:09:01,196 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK (and 4 more)] === [2024-11-10 18:09:01,197 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:09:01,197 INFO L85 PathProgramCache]: Analyzing trace with hash 14705752, now seen corresponding path program 1 times [2024-11-10 18:09:01,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:09:01,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43476017] [2024-11-10 18:09:01,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:09:01,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:09:01,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:09:01,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:09:01,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:09:01,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43476017] [2024-11-10 18:09:01,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43476017] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:09:01,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:09:01,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-10 18:09:01,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644165240] [2024-11-10 18:09:01,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:09:01,246 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 18:09:01,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:09:01,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 18:09:01,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 18:09:01,261 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 108 [2024-11-10 18:09:01,261 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 108 transitions, 232 flow. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 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) [2024-11-10 18:09:01,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:09:01,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 108 [2024-11-10 18:09:01,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:09:03,161 INFO L124 PetriNetUnfolderBase]: 7689/15702 cut-off events. [2024-11-10 18:09:03,163 INFO L125 PetriNetUnfolderBase]: For 80/80 co-relation queries the response was YES. [2024-11-10 18:09:03,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27902 conditions, 15702 events. 7689/15702 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 131267 event pairs, 6776 based on Foata normal form. 4623/19897 useless extension candidates. Maximal degree in co-relation 19328. Up to 10709 conditions per place. [2024-11-10 18:09:03,287 INFO L140 encePairwiseOnDemand]: 86/108 looper letters, 76 selfloop transitions, 2 changer transitions 1/115 dead transitions. [2024-11-10 18:09:03,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 115 transitions, 404 flow [2024-11-10 18:09:03,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 18:09:03,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 18:09:03,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 219 transitions. [2024-11-10 18:09:03,293 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6759259259259259 [2024-11-10 18:09:03,295 INFO L175 Difference]: Start difference. First operand has 93 places, 108 transitions, 232 flow. Second operand 3 states and 219 transitions. [2024-11-10 18:09:03,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 115 transitions, 404 flow [2024-11-10 18:09:03,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 115 transitions, 404 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-10 18:09:03,299 INFO L231 Difference]: Finished difference. Result has 92 places, 86 transitions, 192 flow [2024-11-10 18:09:03,301 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=192, PETRI_PLACES=92, PETRI_TRANSITIONS=86} [2024-11-10 18:09:03,302 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, -1 predicate places. [2024-11-10 18:09:03,303 INFO L471 AbstractCegarLoop]: Abstraction has has 92 places, 86 transitions, 192 flow [2024-11-10 18:09:03,303 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 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) [2024-11-10 18:09:03,303 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:09:03,303 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-10 18:09:03,303 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-10 18:09:03,304 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK (and 4 more)] === [2024-11-10 18:09:03,304 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:09:03,304 INFO L85 PathProgramCache]: Analyzing trace with hash 14705753, now seen corresponding path program 1 times [2024-11-10 18:09:03,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:09:03,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539595137] [2024-11-10 18:09:03,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:09:03,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:09:03,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:09:03,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:09:03,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:09:03,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539595137] [2024-11-10 18:09:03,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539595137] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:09:03,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:09:03,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-10 18:09:03,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823131252] [2024-11-10 18:09:03,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:09:03,400 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 18:09:03,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:09:03,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 18:09:03,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 18:09:03,414 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 108 [2024-11-10 18:09:03,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 86 transitions, 192 flow. Second operand has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 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) [2024-11-10 18:09:03,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:09:03,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 108 [2024-11-10 18:09:03,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:09:05,250 INFO L124 PetriNetUnfolderBase]: 7660/16265 cut-off events. [2024-11-10 18:09:05,250 INFO L125 PetriNetUnfolderBase]: For 398/398 co-relation queries the response was YES. [2024-11-10 18:09:05,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28651 conditions, 16265 events. 7660/16265 cut-off events. For 398/398 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 142182 event pairs, 3612 based on Foata normal form. 1/15505 useless extension candidates. Maximal degree in co-relation 26738. Up to 12029 conditions per place. [2024-11-10 18:09:05,353 INFO L140 encePairwiseOnDemand]: 104/108 looper letters, 65 selfloop transitions, 2 changer transitions 0/102 dead transitions. [2024-11-10 18:09:05,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 102 transitions, 358 flow [2024-11-10 18:09:05,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 18:09:05,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 18:09:05,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 180 transitions. [2024-11-10 18:09:05,356 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-11-10 18:09:05,356 INFO L175 Difference]: Start difference. First operand has 92 places, 86 transitions, 192 flow. Second operand 3 states and 180 transitions. [2024-11-10 18:09:05,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 102 transitions, 358 flow [2024-11-10 18:09:05,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 102 transitions, 354 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-10 18:09:05,380 INFO L231 Difference]: Finished difference. Result has 92 places, 87 transitions, 202 flow [2024-11-10 18:09:05,381 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=202, PETRI_PLACES=92, PETRI_TRANSITIONS=87} [2024-11-10 18:09:05,383 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, -1 predicate places. [2024-11-10 18:09:05,383 INFO L471 AbstractCegarLoop]: Abstraction has has 92 places, 87 transitions, 202 flow [2024-11-10 18:09:05,383 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 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) [2024-11-10 18:09:05,383 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:09:05,384 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2024-11-10 18:09:05,384 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-10 18:09:05,384 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK (and 4 more)] === [2024-11-10 18:09:05,384 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:09:05,384 INFO L85 PathProgramCache]: Analyzing trace with hash -513758079, now seen corresponding path program 1 times [2024-11-10 18:09:05,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:09:05,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590249083] [2024-11-10 18:09:05,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:09:05,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:09:05,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:09:05,524 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:09:05,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:09:05,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590249083] [2024-11-10 18:09:05,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590249083] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:09:05,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21758928] [2024-11-10 18:09:05,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:09:05,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:09:05,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:09:05,529 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) [2024-11-10 18:09:05,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-10 18:09:05,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:09:05,617 INFO L255 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-10 18:09:05,618 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:09:05,632 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 [2024-11-10 18:09:05,703 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:09:05,704 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:09:05,782 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:09:05,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21758928] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:09:05,783 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:09:05,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2024-11-10 18:09:05,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887650306] [2024-11-10 18:09:05,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:09:05,784 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-10 18:09:05,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:09:05,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-10 18:09:05,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-11-10 18:09:05,833 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 108 [2024-11-10 18:09:05,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 87 transitions, 202 flow. Second operand has 7 states, 7 states have (on average 38.42857142857143) internal successors, (269), 7 states have internal predecessors, (269), 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) [2024-11-10 18:09:05,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:09:05,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 108 [2024-11-10 18:09:05,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:09:07,489 INFO L124 PetriNetUnfolderBase]: 7477/15764 cut-off events. [2024-11-10 18:09:07,489 INFO L125 PetriNetUnfolderBase]: For 800/800 co-relation queries the response was YES. [2024-11-10 18:09:07,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28013 conditions, 15764 events. 7477/15764 cut-off events. For 800/800 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 136051 event pairs, 361 based on Foata normal form. 255/15414 useless extension candidates. Maximal degree in co-relation 1880. Up to 8564 conditions per place. [2024-11-10 18:09:07,602 INFO L140 encePairwiseOnDemand]: 103/108 looper letters, 122 selfloop transitions, 4 changer transitions 0/160 dead transitions. [2024-11-10 18:09:07,603 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 160 transitions, 598 flow [2024-11-10 18:09:07,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 18:09:07,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-10 18:09:07,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 309 transitions. [2024-11-10 18:09:07,605 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5722222222222222 [2024-11-10 18:09:07,605 INFO L175 Difference]: Start difference. First operand has 92 places, 87 transitions, 202 flow. Second operand 5 states and 309 transitions. [2024-11-10 18:09:07,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 160 transitions, 598 flow [2024-11-10 18:09:07,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 160 transitions, 596 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-10 18:09:07,613 INFO L231 Difference]: Finished difference. Result has 95 places, 86 transitions, 208 flow [2024-11-10 18:09:07,614 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=208, PETRI_PLACES=95, PETRI_TRANSITIONS=86} [2024-11-10 18:09:07,615 INFO L277 CegarLoopForPetriNet]: 93 programPoint places, 2 predicate places. [2024-11-10 18:09:07,615 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 86 transitions, 208 flow [2024-11-10 18:09:07,615 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 38.42857142857143) internal successors, (269), 7 states have internal predecessors, (269), 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) [2024-11-10 18:09:07,615 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:09:07,616 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1] [2024-11-10 18:09:07,637 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-10 18:09:07,819 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 [2024-11-10 18:09:07,820 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK (and 4 more)] === [2024-11-10 18:09:07,821 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:09:07,821 INFO L85 PathProgramCache]: Analyzing trace with hash -779270100, now seen corresponding path program 1 times [2024-11-10 18:09:07,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:09:07,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521186740] [2024-11-10 18:09:07,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:09:07,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:09:07,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-10 18:09:07,847 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-10 18:09:07,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-10 18:09:07,875 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-10 18:09:07,876 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-10 18:09:07,876 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2024-11-10 18:09:07,876 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2024-11-10 18:09:07,878 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2024-11-10 18:09:07,882 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK (3 of 7 remaining) [2024-11-10 18:09:07,883 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2024-11-10 18:09:07,883 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 7 remaining) [2024-11-10 18:09:07,883 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2024-11-10 18:09:07,883 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-10 18:09:07,883 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2024-11-10 18:09:07,884 WARN L244 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-10 18:09:07,884 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-11-10 18:09:07,920 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-10 18:09:07,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 119 places, 139 transitions, 305 flow [2024-11-10 18:09:07,952 INFO L124 PetriNetUnfolderBase]: 54/322 cut-off events. [2024-11-10 18:09:07,952 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-11-10 18:09:07,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 347 conditions, 322 events. 54/322 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1422 event pairs, 1 based on Foata normal form. 0/228 useless extension candidates. Maximal degree in co-relation 218. Up to 16 conditions per place. [2024-11-10 18:09:07,955 INFO L82 GeneralOperation]: Start removeDead. Operand has 119 places, 139 transitions, 305 flow [2024-11-10 18:09:07,958 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 119 places, 139 transitions, 305 flow [2024-11-10 18:09:07,959 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-10 18:09:07,960 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;@3a2a6b38, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-10 18:09:07,960 INFO L334 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-11-10 18:09:07,961 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-10 18:09:07,962 INFO L124 PetriNetUnfolderBase]: 1/7 cut-off events. [2024-11-10 18:09:07,962 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-10 18:09:07,962 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:09:07,962 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-10 18:09:07,962 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK (and 4 more)] === [2024-11-10 18:09:07,963 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:09:07,963 INFO L85 PathProgramCache]: Analyzing trace with hash 18984728, now seen corresponding path program 1 times [2024-11-10 18:09:07,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:09:07,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568964686] [2024-11-10 18:09:07,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:09:07,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:09:07,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:09:08,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:09:08,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:09:08,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568964686] [2024-11-10 18:09:08,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568964686] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:09:08,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:09:08,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-10 18:09:08,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958890105] [2024-11-10 18:09:08,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:09:08,155 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 18:09:08,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:09:08,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 18:09:08,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 18:09:08,165 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 139 [2024-11-10 18:09:08,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 139 transitions, 305 flow. Second operand has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 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) [2024-11-10 18:09:08,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:09:08,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 139 [2024-11-10 18:09:08,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:09:33,471 INFO L124 PetriNetUnfolderBase]: 179600/298536 cut-off events. [2024-11-10 18:09:33,472 INFO L125 PetriNetUnfolderBase]: For 2438/2438 co-relation queries the response was YES. [2024-11-10 18:09:34,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 547584 conditions, 298536 events. 179600/298536 cut-off events. For 2438/2438 co-relation queries the response was YES. Maximal size of possible extension queue 5457. Compared 2963435 event pairs, 157823 based on Foata normal form. 95788/387440 useless extension candidates. Maximal degree in co-relation 201393. Up to 217632 conditions per place. [2024-11-10 18:09:35,323 INFO L140 encePairwiseOnDemand]: 111/139 looper letters, 106 selfloop transitions, 2 changer transitions 1/154 dead transitions. [2024-11-10 18:09:35,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 154 transitions, 553 flow [2024-11-10 18:09:35,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 18:09:35,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 18:09:35,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 288 transitions. [2024-11-10 18:09:35,325 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6906474820143885 [2024-11-10 18:09:35,325 INFO L175 Difference]: Start difference. First operand has 119 places, 139 transitions, 305 flow. Second operand 3 states and 288 transitions. [2024-11-10 18:09:35,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 154 transitions, 553 flow [2024-11-10 18:09:35,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 154 transitions, 553 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-10 18:09:35,334 INFO L231 Difference]: Finished difference. Result has 118 places, 111 transitions, 253 flow [2024-11-10 18:09:35,335 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=139, PETRI_DIFFERENCE_MINUEND_FLOW=251, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=253, PETRI_PLACES=118, PETRI_TRANSITIONS=111} [2024-11-10 18:09:35,335 INFO L277 CegarLoopForPetriNet]: 119 programPoint places, -1 predicate places. [2024-11-10 18:09:35,336 INFO L471 AbstractCegarLoop]: Abstraction has has 118 places, 111 transitions, 253 flow [2024-11-10 18:09:35,336 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 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) [2024-11-10 18:09:35,336 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:09:35,336 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-10 18:09:35,336 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-10 18:09:35,337 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK (and 4 more)] === [2024-11-10 18:09:35,337 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:09:35,337 INFO L85 PathProgramCache]: Analyzing trace with hash 18984729, now seen corresponding path program 1 times [2024-11-10 18:09:35,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:09:35,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980768982] [2024-11-10 18:09:35,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:09:35,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:09:35,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:09:35,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:09:35,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:09:35,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980768982] [2024-11-10 18:09:35,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980768982] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:09:35,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:09:35,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-10 18:09:35,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038371725] [2024-11-10 18:09:35,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:09:35,401 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 18:09:35,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:09:35,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 18:09:35,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 18:09:35,413 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 139 [2024-11-10 18:09:35,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 111 transitions, 253 flow. Second operand has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 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) [2024-11-10 18:09:35,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:09:35,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 139 [2024-11-10 18:09:35,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand