./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/goblint-regression/28-race_reach_77-tricky_address4_racing.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 3061b6dc 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_77-tricky_address4_racing.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash dce9d71ca8bbe247a74e6b2653e5cdb882c6b8b5d902edf534df70d90ee806fe --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-3061b6d-m [2024-11-19 09:41:40,809 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-19 09:41:40,883 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-19 09:41:40,888 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-19 09:41:40,889 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-19 09:41:40,917 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-19 09:41:40,918 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-19 09:41:40,918 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-19 09:41:40,919 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-19 09:41:40,920 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-19 09:41:40,921 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-19 09:41:40,921 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-19 09:41:40,922 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-19 09:41:40,924 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-19 09:41:40,924 INFO L153 SettingsManager]: * Use SBE=true [2024-11-19 09:41:40,925 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-19 09:41:40,925 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-19 09:41:40,925 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-19 09:41:40,925 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-19 09:41:40,928 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-19 09:41:40,928 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-19 09:41:40,929 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-19 09:41:40,929 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-19 09:41:40,929 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-19 09:41:40,930 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-19 09:41:40,930 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-19 09:41:40,930 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-19 09:41:40,930 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-19 09:41:40,931 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-19 09:41:40,931 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-19 09:41:40,931 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-19 09:41:40,931 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-19 09:41:40,932 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-19 09:41:40,932 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 09:41:40,932 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-19 09:41:40,933 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-19 09:41:40,933 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-19 09:41:40,933 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-19 09:41:40,933 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-19 09:41:40,933 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-19 09:41:40,934 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-19 09:41:40,935 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-19 09:41:40,935 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dce9d71ca8bbe247a74e6b2653e5cdb882c6b8b5d902edf534df70d90ee806fe [2024-11-19 09:41:41,224 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-19 09:41:41,250 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-19 09:41:41,252 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-19 09:41:41,253 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-19 09:41:41,254 INFO L274 PluginConnector]: CDTParser initialized [2024-11-19 09:41:41,255 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/28-race_reach_77-tricky_address4_racing.i [2024-11-19 09:41:42,718 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-19 09:41:43,031 INFO L384 CDTParser]: Found 1 translation units. [2024-11-19 09:41:43,033 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_77-tricky_address4_racing.i [2024-11-19 09:41:43,056 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/df761c1b3/a696c4a99dc6466cbadbd4df0126ff9d/FLAG46f65e7ba [2024-11-19 09:41:43,068 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/df761c1b3/a696c4a99dc6466cbadbd4df0126ff9d [2024-11-19 09:41:43,071 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-19 09:41:43,072 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-19 09:41:43,073 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-19 09:41:43,074 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-19 09:41:43,080 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-19 09:41:43,081 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 09:41:43" (1/1) ... [2024-11-19 09:41:43,082 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@288318df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:41:43, skipping insertion in model container [2024-11-19 09:41:43,082 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 09:41:43" (1/1) ... [2024-11-19 09:41:43,132 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-19 09:41:43,620 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 09:41:43,677 INFO L200 MainTranslator]: Completed pre-run [2024-11-19 09:41:43,749 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 09:41:43,814 INFO L204 MainTranslator]: Completed translation [2024-11-19 09:41:43,815 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:41:43 WrapperNode [2024-11-19 09:41:43,815 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-19 09:41:43,817 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-19 09:41:43,817 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-19 09:41:43,817 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-19 09:41:43,825 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:41:43" (1/1) ... [2024-11-19 09:41:43,849 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:41:43" (1/1) ... [2024-11-19 09:41:43,895 INFO L138 Inliner]: procedures = 271, calls = 110, calls flagged for inlining = 7, calls inlined = 8, statements flattened = 279 [2024-11-19 09:41:43,895 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-19 09:41:43,896 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-19 09:41:43,896 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-19 09:41:43,896 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-19 09:41:43,907 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:41:43" (1/1) ... [2024-11-19 09:41:43,907 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:41:43" (1/1) ... [2024-11-19 09:41:43,913 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:41:43" (1/1) ... [2024-11-19 09:41:43,931 INFO L175 MemorySlicer]: Split 79 memory accesses to 4 slices as follows [2, 2, 5, 70]. 89 percent of accesses are in the largest equivalence class. The 67 initializations are split as follows [2, 0, 5, 60]. The 5 writes are split as follows [0, 1, 0, 4]. [2024-11-19 09:41:43,931 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:41:43" (1/1) ... [2024-11-19 09:41:43,931 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:41:43" (1/1) ... [2024-11-19 09:41:43,941 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:41:43" (1/1) ... [2024-11-19 09:41:43,952 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:41:43" (1/1) ... [2024-11-19 09:41:43,955 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:41:43" (1/1) ... [2024-11-19 09:41:43,960 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:41:43" (1/1) ... [2024-11-19 09:41:43,968 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-19 09:41:43,969 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-19 09:41:43,969 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-19 09:41:43,970 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-19 09:41:43,971 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:41:43" (1/1) ... [2024-11-19 09:41:43,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 09:41:43,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:41:44,018 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) [2024-11-19 09:41:44,027 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 [2024-11-19 09:41:44,070 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-19 09:41:44,070 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-19 09:41:44,071 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-11-19 09:41:44,071 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-19 09:41:44,071 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-19 09:41:44,071 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-19 09:41:44,071 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-19 09:41:44,071 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-19 09:41:44,071 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-19 09:41:44,071 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-19 09:41:44,071 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-19 09:41:44,072 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-11-19 09:41:44,072 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-19 09:41:44,072 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2024-11-19 09:41:44,072 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2024-11-19 09:41:44,072 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-19 09:41:44,072 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-19 09:41:44,072 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-19 09:41:44,072 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-19 09:41:44,073 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-19 09:41:44,073 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-19 09:41:44,074 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-19 09:41:44,256 INFO L238 CfgBuilder]: Building ICFG [2024-11-19 09:41:44,257 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-19 09:41:44,705 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-19 09:41:44,705 INFO L287 CfgBuilder]: Performing block encoding [2024-11-19 09:41:45,226 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-19 09:41:45,226 INFO L316 CfgBuilder]: Removed 23 assume(true) statements. [2024-11-19 09:41:45,227 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 09:41:45 BoogieIcfgContainer [2024-11-19 09:41:45,227 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-19 09:41:45,230 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-19 09:41:45,230 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-19 09:41:45,234 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-19 09:41:45,235 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 09:41:43" (1/3) ... [2024-11-19 09:41:45,235 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69185758 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 09:41:45, skipping insertion in model container [2024-11-19 09:41:45,235 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:41:43" (2/3) ... [2024-11-19 09:41:45,236 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69185758 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 09:41:45, skipping insertion in model container [2024-11-19 09:41:45,236 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 09:41:45" (3/3) ... [2024-11-19 09:41:45,237 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_77-tricky_address4_racing.i [2024-11-19 09:41:45,256 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-19 09:41:45,256 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 27 error locations. [2024-11-19 09:41:45,256 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-19 09:41:45,326 INFO L143 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2024-11-19 09:41:45,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 112 places, 137 transitions, 281 flow [2024-11-19 09:41:45,436 INFO L124 PetriNetUnfolderBase]: 41/207 cut-off events. [2024-11-19 09:41:45,436 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-19 09:41:45,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 212 conditions, 207 events. 41/207 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1068 event pairs, 0 based on Foata normal form. 0/120 useless extension candidates. Maximal degree in co-relation 130. Up to 8 conditions per place. [2024-11-19 09:41:45,445 INFO L82 GeneralOperation]: Start removeDead. Operand has 112 places, 137 transitions, 281 flow [2024-11-19 09:41:45,475 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 112 places, 137 transitions, 281 flow [2024-11-19 09:41:45,488 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-19 09:41:45,496 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;@1995120c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-19 09:41:45,498 INFO L334 AbstractCegarLoop]: Starting to check reachability of 39 error locations. [2024-11-19 09:41:45,504 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-19 09:41:45,504 INFO L124 PetriNetUnfolderBase]: 1/6 cut-off events. [2024-11-19 09:41:45,505 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-19 09:41:45,505 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:41:45,506 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-19 09:41:45,507 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-19 09:41:45,513 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:41:45,514 INFO L85 PathProgramCache]: Analyzing trace with hash 22598579, now seen corresponding path program 1 times [2024-11-19 09:41:45,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:41:45,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856203661] [2024-11-19 09:41:45,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:41:45,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:41:45,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:41:45,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:41:45,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:41:45,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856203661] [2024-11-19 09:41:45,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856203661] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:41:45,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:41:45,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 09:41:45,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737298916] [2024-11-19 09:41:45,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:41:45,881 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 09:41:45,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:41:45,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 09:41:45,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 09:41:45,919 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 137 [2024-11-19 09:41:45,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 137 transitions, 281 flow. Second operand has 3 states, 3 states have (on average 61.0) internal successors, (183), 3 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:41:45,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:41:45,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 137 [2024-11-19 09:41:45,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:41:46,392 INFO L124 PetriNetUnfolderBase]: 554/1924 cut-off events. [2024-11-19 09:41:46,393 INFO L125 PetriNetUnfolderBase]: For 4/5 co-relation queries the response was YES. [2024-11-19 09:41:46,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3028 conditions, 1924 events. 554/1924 cut-off events. For 4/5 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 15020 event pairs, 504 based on Foata normal form. 386/2045 useless extension candidates. Maximal degree in co-relation 2927. Up to 1098 conditions per place. [2024-11-19 09:41:46,414 INFO L140 encePairwiseOnDemand]: 110/137 looper letters, 50 selfloop transitions, 2 changer transitions 0/112 dead transitions. [2024-11-19 09:41:46,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 112 transitions, 335 flow [2024-11-19 09:41:46,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 09:41:46,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 09:41:46,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 257 transitions. [2024-11-19 09:41:46,431 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6253041362530414 [2024-11-19 09:41:46,433 INFO L175 Difference]: Start difference. First operand has 112 places, 137 transitions, 281 flow. Second operand 3 states and 257 transitions. [2024-11-19 09:41:46,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 112 transitions, 335 flow [2024-11-19 09:41:46,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 112 transitions, 335 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-19 09:41:46,443 INFO L231 Difference]: Finished difference. Result has 113 places, 112 transitions, 241 flow [2024-11-19 09:41:46,445 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=241, PETRI_PLACES=113, PETRI_TRANSITIONS=112} [2024-11-19 09:41:46,449 INFO L277 CegarLoopForPetriNet]: 112 programPoint places, 1 predicate places. [2024-11-19 09:41:46,449 INFO L471 AbstractCegarLoop]: Abstraction has has 113 places, 112 transitions, 241 flow [2024-11-19 09:41:46,450 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.0) internal successors, (183), 3 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:41:46,450 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:41:46,450 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-11-19 09:41:46,452 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-19 09:41:46,453 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-19 09:41:46,453 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:41:46,453 INFO L85 PathProgramCache]: Analyzing trace with hash 700582157, now seen corresponding path program 1 times [2024-11-19 09:41:46,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:41:46,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332346520] [2024-11-19 09:41:46,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:41:46,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:41:46,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:41:46,602 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:41:46,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:41:46,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332346520] [2024-11-19 09:41:46,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332346520] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:41:46,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274199654] [2024-11-19 09:41:46,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:41:46,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:41:46,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:41:46,609 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) [2024-11-19 09:41:46,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-19 09:41:46,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:41:46,727 INFO L255 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-19 09:41:46,732 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:41:46,778 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:41:46,779 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:41:46,803 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:41:46,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274199654] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:41:46,803 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:41:46,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-11-19 09:41:46,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802959146] [2024-11-19 09:41:46,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:41:46,806 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-19 09:41:46,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:41:46,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-19 09:41:46,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-19 09:41:46,808 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 137 [2024-11-19 09:41:46,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 112 transitions, 241 flow. Second operand has 7 states, 7 states have (on average 61.285714285714285) internal successors, (429), 7 states have internal predecessors, (429), 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) [2024-11-19 09:41:46,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:41:46,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 137 [2024-11-19 09:41:46,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:41:47,145 INFO L124 PetriNetUnfolderBase]: 554/1927 cut-off events. [2024-11-19 09:41:47,145 INFO L125 PetriNetUnfolderBase]: For 4/5 co-relation queries the response was YES. [2024-11-19 09:41:47,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3044 conditions, 1927 events. 554/1927 cut-off events. For 4/5 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 15014 event pairs, 504 based on Foata normal form. 0/1662 useless extension candidates. Maximal degree in co-relation 3032. Up to 1098 conditions per place. [2024-11-19 09:41:47,155 INFO L140 encePairwiseOnDemand]: 134/137 looper letters, 50 selfloop transitions, 5 changer transitions 0/115 dead transitions. [2024-11-19 09:41:47,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 115 transitions, 363 flow [2024-11-19 09:41:47,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-19 09:41:47,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-19 09:41:47,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 418 transitions. [2024-11-19 09:41:47,162 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5085158150851582 [2024-11-19 09:41:47,163 INFO L175 Difference]: Start difference. First operand has 113 places, 112 transitions, 241 flow. Second operand 6 states and 418 transitions. [2024-11-19 09:41:47,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 115 transitions, 363 flow [2024-11-19 09:41:47,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 115 transitions, 359 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-19 09:41:47,167 INFO L231 Difference]: Finished difference. Result has 120 places, 115 transitions, 273 flow [2024-11-19 09:41:47,167 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=237, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=273, PETRI_PLACES=120, PETRI_TRANSITIONS=115} [2024-11-19 09:41:47,168 INFO L277 CegarLoopForPetriNet]: 112 programPoint places, 8 predicate places. [2024-11-19 09:41:47,168 INFO L471 AbstractCegarLoop]: Abstraction has has 120 places, 115 transitions, 273 flow [2024-11-19 09:41:47,168 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 61.285714285714285) internal successors, (429), 7 states have internal predecessors, (429), 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) [2024-11-19 09:41:47,169 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:41:47,169 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2024-11-19 09:41:47,188 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-19 09:41:47,373 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:41:47,375 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-19 09:41:47,375 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:41:47,375 INFO L85 PathProgramCache]: Analyzing trace with hash 1822972467, now seen corresponding path program 2 times [2024-11-19 09:41:47,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:41:47,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747521952] [2024-11-19 09:41:47,376 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:41:47,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:41:47,402 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-19 09:41:47,403 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:41:47,480 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-19 09:41:47,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:41:47,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747521952] [2024-11-19 09:41:47,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747521952] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:41:47,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:41:47,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 09:41:47,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178312303] [2024-11-19 09:41:47,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:41:47,481 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 09:41:47,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:41:47,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 09:41:47,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 09:41:47,520 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 137 [2024-11-19 09:41:47,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 115 transitions, 273 flow. Second operand has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 3 states have internal predecessors, (173), 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) [2024-11-19 09:41:47,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:41:47,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 137 [2024-11-19 09:41:47,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:41:47,802 INFO L124 PetriNetUnfolderBase]: 598/1996 cut-off events. [2024-11-19 09:41:47,802 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-19 09:41:47,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3215 conditions, 1996 events. 598/1996 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 15441 event pairs, 504 based on Foata normal form. 0/1769 useless extension candidates. Maximal degree in co-relation 3181. Up to 1094 conditions per place. [2024-11-19 09:41:47,816 INFO L140 encePairwiseOnDemand]: 133/137 looper letters, 76 selfloop transitions, 2 changer transitions 0/134 dead transitions. [2024-11-19 09:41:47,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 134 transitions, 467 flow [2024-11-19 09:41:47,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 09:41:47,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 09:41:47,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 244 transitions. [2024-11-19 09:41:47,818 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5936739659367397 [2024-11-19 09:41:47,818 INFO L175 Difference]: Start difference. First operand has 120 places, 115 transitions, 273 flow. Second operand 3 states and 244 transitions. [2024-11-19 09:41:47,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 134 transitions, 467 flow [2024-11-19 09:41:47,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 134 transitions, 453 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-11-19 09:41:47,822 INFO L231 Difference]: Finished difference. Result has 119 places, 113 transitions, 259 flow [2024-11-19 09:41:47,822 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=255, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=259, PETRI_PLACES=119, PETRI_TRANSITIONS=113} [2024-11-19 09:41:47,823 INFO L277 CegarLoopForPetriNet]: 112 programPoint places, 7 predicate places. [2024-11-19 09:41:47,823 INFO L471 AbstractCegarLoop]: Abstraction has has 119 places, 113 transitions, 259 flow [2024-11-19 09:41:47,824 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 3 states have internal predecessors, (173), 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) [2024-11-19 09:41:47,824 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:41:47,824 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2024-11-19 09:41:47,824 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-19 09:41:47,824 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-19 09:41:47,825 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:41:47,825 INFO L85 PathProgramCache]: Analyzing trace with hash 1822972468, now seen corresponding path program 1 times [2024-11-19 09:41:47,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:41:47,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118209951] [2024-11-19 09:41:47,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:41:47,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:41:47,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:41:47,931 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:41:47,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:41:47,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118209951] [2024-11-19 09:41:47,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118209951] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:41:47,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012847764] [2024-11-19 09:41:47,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:41:47,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:41:47,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:41:47,934 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) [2024-11-19 09:41:47,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-19 09:41:48,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:41:48,034 INFO L255 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-19 09:41:48,035 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:41:48,052 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:41:48,053 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:41:48,120 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:41:48,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012847764] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:41:48,121 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:41:48,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-11-19 09:41:48,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632550056] [2024-11-19 09:41:48,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:41:48,122 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-19 09:41:48,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:41:48,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-19 09:41:48,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-11-19 09:41:48,124 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 137 [2024-11-19 09:41:48,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 113 transitions, 259 flow. Second operand has 13 states, 13 states have (on average 61.15384615384615) internal successors, (795), 13 states have internal predecessors, (795), 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) [2024-11-19 09:41:48,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:41:48,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 137 [2024-11-19 09:41:48,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:41:48,409 INFO L124 PetriNetUnfolderBase]: 554/1911 cut-off events. [2024-11-19 09:41:48,409 INFO L125 PetriNetUnfolderBase]: For 54/55 co-relation queries the response was YES. [2024-11-19 09:41:48,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3077 conditions, 1911 events. 554/1911 cut-off events. For 54/55 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 14748 event pairs, 504 based on Foata normal form. 6/1675 useless extension candidates. Maximal degree in co-relation 3025. Up to 1098 conditions per place. [2024-11-19 09:41:48,422 INFO L140 encePairwiseOnDemand]: 134/137 looper letters, 50 selfloop transitions, 11 changer transitions 0/119 dead transitions. [2024-11-19 09:41:48,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 119 transitions, 417 flow [2024-11-19 09:41:48,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-19 09:41:48,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-19 09:41:48,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 787 transitions. [2024-11-19 09:41:48,425 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4787104622871046 [2024-11-19 09:41:48,425 INFO L175 Difference]: Start difference. First operand has 119 places, 113 transitions, 259 flow. Second operand 12 states and 787 transitions. [2024-11-19 09:41:48,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 119 transitions, 417 flow [2024-11-19 09:41:48,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 119 transitions, 413 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 09:41:48,430 INFO L231 Difference]: Finished difference. Result has 134 places, 119 transitions, 339 flow [2024-11-19 09:41:48,431 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=255, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=339, PETRI_PLACES=134, PETRI_TRANSITIONS=119} [2024-11-19 09:41:48,431 INFO L277 CegarLoopForPetriNet]: 112 programPoint places, 22 predicate places. [2024-11-19 09:41:48,432 INFO L471 AbstractCegarLoop]: Abstraction has has 134 places, 119 transitions, 339 flow [2024-11-19 09:41:48,432 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 61.15384615384615) internal successors, (795), 13 states have internal predecessors, (795), 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) [2024-11-19 09:41:48,433 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:41:48,433 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1] [2024-11-19 09:41:48,451 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-19 09:41:48,633 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2024-11-19 09:41:48,634 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-19 09:41:48,635 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:41:48,635 INFO L85 PathProgramCache]: Analyzing trace with hash 1312295924, now seen corresponding path program 2 times [2024-11-19 09:41:48,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:41:48,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491882393] [2024-11-19 09:41:48,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:41:48,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:41:48,660 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-19 09:41:48,660 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:41:48,732 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-11-19 09:41:48,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:41:48,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491882393] [2024-11-19 09:41:48,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491882393] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:41:48,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:41:48,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 09:41:48,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579770206] [2024-11-19 09:41:48,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:41:48,734 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 09:41:48,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:41:48,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 09:41:48,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 09:41:48,769 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 137 [2024-11-19 09:41:48,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 119 transitions, 339 flow. Second operand has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 3 states have internal predecessors, (182), 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) [2024-11-19 09:41:48,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:41:48,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 137 [2024-11-19 09:41:48,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:41:49,059 INFO L124 PetriNetUnfolderBase]: 549/1849 cut-off events. [2024-11-19 09:41:49,059 INFO L125 PetriNetUnfolderBase]: For 35/35 co-relation queries the response was YES. [2024-11-19 09:41:49,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3029 conditions, 1849 events. 549/1849 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 14578 event pairs, 0 based on Foata normal form. 1/1636 useless extension candidates. Maximal degree in co-relation 2953. Up to 1092 conditions per place. [2024-11-19 09:41:49,073 INFO L140 encePairwiseOnDemand]: 133/137 looper letters, 82 selfloop transitions, 2 changer transitions 0/141 dead transitions. [2024-11-19 09:41:49,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 141 transitions, 551 flow [2024-11-19 09:41:49,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 09:41:49,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 09:41:49,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 253 transitions. [2024-11-19 09:41:49,075 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6155717761557178 [2024-11-19 09:41:49,076 INFO L175 Difference]: Start difference. First operand has 134 places, 119 transitions, 339 flow. Second operand 3 states and 253 transitions. [2024-11-19 09:41:49,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 141 transitions, 551 flow [2024-11-19 09:41:49,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 141 transitions, 503 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-11-19 09:41:49,085 INFO L231 Difference]: Finished difference. Result has 132 places, 119 transitions, 301 flow [2024-11-19 09:41:49,085 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=291, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=301, PETRI_PLACES=132, PETRI_TRANSITIONS=119} [2024-11-19 09:41:49,087 INFO L277 CegarLoopForPetriNet]: 112 programPoint places, 20 predicate places. [2024-11-19 09:41:49,088 INFO L471 AbstractCegarLoop]: Abstraction has has 132 places, 119 transitions, 301 flow [2024-11-19 09:41:49,088 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 3 states have internal predecessors, (182), 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) [2024-11-19 09:41:49,088 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:41:49,088 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1] [2024-11-19 09:41:49,089 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-19 09:41:49,089 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-19 09:41:49,089 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:41:49,089 INFO L85 PathProgramCache]: Analyzing trace with hash 471841507, now seen corresponding path program 1 times [2024-11-19 09:41:49,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:41:49,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308692435] [2024-11-19 09:41:49,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:41:49,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:41:49,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:41:49,291 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-11-19 09:41:49,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:41:49,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308692435] [2024-11-19 09:41:49,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308692435] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:41:49,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14628120] [2024-11-19 09:41:49,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:41:49,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:41:49,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:41:49,294 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:41:49,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-19 09:41:49,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:41:49,406 INFO L255 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-19 09:41:49,408 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:41:49,454 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 [2024-11-19 09:41:49,532 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-11-19 09:41:49,532 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:41:49,598 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-11-19 09:41:49,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14628120] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:41:49,599 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:41:49,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2024-11-19 09:41:49,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673527253] [2024-11-19 09:41:49,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:41:49,600 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-19 09:41:49,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:41:49,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-19 09:41:49,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-11-19 09:41:49,755 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 137 [2024-11-19 09:41:49,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 119 transitions, 301 flow. Second operand has 9 states, 9 states have (on average 60.55555555555556) internal successors, (545), 9 states have internal predecessors, (545), 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) [2024-11-19 09:41:49,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:41:49,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 137 [2024-11-19 09:41:49,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:41:49,898 INFO L124 PetriNetUnfolderBase]: 65/213 cut-off events. [2024-11-19 09:41:49,898 INFO L125 PetriNetUnfolderBase]: For 88/88 co-relation queries the response was YES. [2024-11-19 09:41:49,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 465 conditions, 213 events. 65/213 cut-off events. For 88/88 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 855 event pairs, 0 based on Foata normal form. 44/245 useless extension candidates. Maximal degree in co-relation 412. Up to 129 conditions per place. [2024-11-19 09:41:49,900 INFO L140 encePairwiseOnDemand]: 133/137 looper letters, 59 selfloop transitions, 2 changer transitions 0/87 dead transitions. [2024-11-19 09:41:49,900 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 87 transitions, 352 flow [2024-11-19 09:41:49,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 09:41:49,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 09:41:49,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 285 transitions. [2024-11-19 09:41:49,902 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5200729927007299 [2024-11-19 09:41:49,902 INFO L175 Difference]: Start difference. First operand has 132 places, 119 transitions, 301 flow. Second operand 4 states and 285 transitions. [2024-11-19 09:41:49,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 87 transitions, 352 flow [2024-11-19 09:41:49,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 87 transitions, 346 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-19 09:41:49,905 INFO L231 Difference]: Finished difference. Result has 79 places, 64 transitions, 182 flow [2024-11-19 09:41:49,905 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=182, PETRI_PLACES=79, PETRI_TRANSITIONS=64} [2024-11-19 09:41:49,907 INFO L277 CegarLoopForPetriNet]: 112 programPoint places, -33 predicate places. [2024-11-19 09:41:49,908 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 64 transitions, 182 flow [2024-11-19 09:41:49,908 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 60.55555555555556) internal successors, (545), 9 states have internal predecessors, (545), 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) [2024-11-19 09:41:49,908 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:41:49,908 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 2, 2, 1, 1, 1, 1, 1] [2024-11-19 09:41:49,926 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-19 09:41:50,109 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:41:50,109 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-19 09:41:50,110 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:41:50,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1742185627, now seen corresponding path program 1 times [2024-11-19 09:41:50,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:41:50,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873468591] [2024-11-19 09:41:50,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:41:50,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:41:50,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-19 09:41:50,145 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-19 09:41:50,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-19 09:41:50,193 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-19 09:41:50,193 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-19 09:41:50,195 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (38 of 39 remaining) [2024-11-19 09:41:50,197 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 39 remaining) [2024-11-19 09:41:50,197 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 39 remaining) [2024-11-19 09:41:50,197 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 39 remaining) [2024-11-19 09:41:50,197 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 39 remaining) [2024-11-19 09:41:50,197 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK (33 of 39 remaining) [2024-11-19 09:41:50,198 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 39 remaining) [2024-11-19 09:41:50,198 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 39 remaining) [2024-11-19 09:41:50,198 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 39 remaining) [2024-11-19 09:41:50,198 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 39 remaining) [2024-11-19 09:41:50,198 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 39 remaining) [2024-11-19 09:41:50,199 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 39 remaining) [2024-11-19 09:41:50,199 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 39 remaining) [2024-11-19 09:41:50,199 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 39 remaining) [2024-11-19 09:41:50,199 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 39 remaining) [2024-11-19 09:41:50,200 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 39 remaining) [2024-11-19 09:41:50,200 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK (22 of 39 remaining) [2024-11-19 09:41:50,200 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 39 remaining) [2024-11-19 09:41:50,200 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 39 remaining) [2024-11-19 09:41:50,203 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 39 remaining) [2024-11-19 09:41:50,203 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 39 remaining) [2024-11-19 09:41:50,203 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 39 remaining) [2024-11-19 09:41:50,204 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 39 remaining) [2024-11-19 09:41:50,204 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 39 remaining) [2024-11-19 09:41:50,204 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 39 remaining) [2024-11-19 09:41:50,204 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 39 remaining) [2024-11-19 09:41:50,204 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 39 remaining) [2024-11-19 09:41:50,204 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (11 of 39 remaining) [2024-11-19 09:41:50,204 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 39 remaining) [2024-11-19 09:41:50,204 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 39 remaining) [2024-11-19 09:41:50,204 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 39 remaining) [2024-11-19 09:41:50,205 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 39 remaining) [2024-11-19 09:41:50,205 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 39 remaining) [2024-11-19 09:41:50,205 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 39 remaining) [2024-11-19 09:41:50,205 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 39 remaining) [2024-11-19 09:41:50,205 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 39 remaining) [2024-11-19 09:41:50,205 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 39 remaining) [2024-11-19 09:41:50,205 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 39 remaining) [2024-11-19 09:41:50,205 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (0 of 39 remaining) [2024-11-19 09:41:50,205 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-19 09:41:50,206 INFO L407 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1] [2024-11-19 09:41:50,212 WARN L244 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-19 09:41:50,212 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-11-19 09:41:50,259 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-19 09:41:50,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 161 places, 198 transitions, 412 flow [2024-11-19 09:41:50,295 INFO L124 PetriNetUnfolderBase]: 69/350 cut-off events. [2024-11-19 09:41:50,296 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-19 09:41:50,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 362 conditions, 350 events. 69/350 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 2047 event pairs, 0 based on Foata normal form. 0/204 useless extension candidates. Maximal degree in co-relation 209. Up to 12 conditions per place. [2024-11-19 09:41:50,300 INFO L82 GeneralOperation]: Start removeDead. Operand has 161 places, 198 transitions, 412 flow [2024-11-19 09:41:50,306 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 161 places, 198 transitions, 412 flow [2024-11-19 09:41:50,308 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-19 09:41:50,310 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;@1995120c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-19 09:41:50,310 INFO L334 AbstractCegarLoop]: Starting to check reachability of 50 error locations. [2024-11-19 09:41:50,312 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-19 09:41:50,316 INFO L124 PetriNetUnfolderBase]: 1/6 cut-off events. [2024-11-19 09:41:50,316 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-19 09:41:50,316 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:41:50,316 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-19 09:41:50,317 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-19 09:41:50,317 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:41:50,317 INFO L85 PathProgramCache]: Analyzing trace with hash 28693811, now seen corresponding path program 1 times [2024-11-19 09:41:50,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:41:50,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133083566] [2024-11-19 09:41:50,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:41:50,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:41:50,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:41:50,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:41:50,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:41:50,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133083566] [2024-11-19 09:41:50,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133083566] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:41:50,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:41:50,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 09:41:50,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086640451] [2024-11-19 09:41:50,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:41:50,365 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 09:41:50,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:41:50,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 09:41:50,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 09:41:50,366 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 198 [2024-11-19 09:41:50,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 198 transitions, 412 flow. Second operand has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 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) [2024-11-19 09:41:50,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:41:50,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 198 [2024-11-19 09:41:50,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:41:55,644 INFO L124 PetriNetUnfolderBase]: 24909/55324 cut-off events. [2024-11-19 09:41:55,645 INFO L125 PetriNetUnfolderBase]: For 153/175 co-relation queries the response was YES. [2024-11-19 09:41:55,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92368 conditions, 55324 events. 24909/55324 cut-off events. For 153/175 co-relation queries the response was YES. Maximal size of possible extension queue 1647. Compared 617876 event pairs, 23247 based on Foata normal form. 13194/62140 useless extension candidates. Maximal degree in co-relation 85069. Up to 36926 conditions per place. [2024-11-19 09:41:56,010 INFO L140 encePairwiseOnDemand]: 159/198 looper letters, 73 selfloop transitions, 2 changer transitions 0/160 dead transitions. [2024-11-19 09:41:56,011 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 160 transitions, 486 flow [2024-11-19 09:41:56,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 09:41:56,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 09:41:56,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 367 transitions. [2024-11-19 09:41:56,013 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6178451178451179 [2024-11-19 09:41:56,013 INFO L175 Difference]: Start difference. First operand has 161 places, 198 transitions, 412 flow. Second operand 3 states and 367 transitions. [2024-11-19 09:41:56,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 160 transitions, 486 flow [2024-11-19 09:41:56,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 160 transitions, 486 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-19 09:41:56,018 INFO L231 Difference]: Finished difference. Result has 161 places, 160 transitions, 346 flow [2024-11-19 09:41:56,019 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=334, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=346, PETRI_PLACES=161, PETRI_TRANSITIONS=160} [2024-11-19 09:41:56,020 INFO L277 CegarLoopForPetriNet]: 161 programPoint places, 0 predicate places. [2024-11-19 09:41:56,020 INFO L471 AbstractCegarLoop]: Abstraction has has 161 places, 160 transitions, 346 flow [2024-11-19 09:41:56,021 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 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) [2024-11-19 09:41:56,021 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:41:56,021 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-11-19 09:41:56,021 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-19 09:41:56,021 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-19 09:41:56,022 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:41:56,022 INFO L85 PathProgramCache]: Analyzing trace with hash 889534547, now seen corresponding path program 1 times [2024-11-19 09:41:56,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:41:56,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976679358] [2024-11-19 09:41:56,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:41:56,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:41:56,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:41:56,073 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:41:56,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:41:56,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976679358] [2024-11-19 09:41:56,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976679358] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:41:56,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361893280] [2024-11-19 09:41:56,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:41:56,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:41:56,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:41:56,077 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:41:56,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-19 09:41:56,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:41:56,177 INFO L255 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-19 09:41:56,177 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:41:56,187 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:41:56,188 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:41:56,204 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:41:56,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361893280] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:41:56,204 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:41:56,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-11-19 09:41:56,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770593945] [2024-11-19 09:41:56,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:41:56,205 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-19 09:41:56,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:41:56,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-19 09:41:56,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-19 09:41:56,206 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 198 [2024-11-19 09:41:56,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 160 transitions, 346 flow. Second operand has 7 states, 7 states have (on average 86.28571428571429) internal successors, (604), 7 states have internal predecessors, (604), 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) [2024-11-19 09:41:56,208 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:41:56,208 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 198 [2024-11-19 09:41:56,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:42:00,328 INFO L124 PetriNetUnfolderBase]: 24909/55327 cut-off events. [2024-11-19 09:42:00,328 INFO L125 PetriNetUnfolderBase]: For 153/175 co-relation queries the response was YES. [2024-11-19 09:42:00,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92384 conditions, 55327 events. 24909/55327 cut-off events. For 153/175 co-relation queries the response was YES. Maximal size of possible extension queue 1647. Compared 618076 event pairs, 23247 based on Foata normal form. 0/48949 useless extension candidates. Maximal degree in co-relation 92371. Up to 36926 conditions per place. [2024-11-19 09:42:00,724 INFO L140 encePairwiseOnDemand]: 195/198 looper letters, 73 selfloop transitions, 5 changer transitions 0/163 dead transitions. [2024-11-19 09:42:00,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 163 transitions, 514 flow [2024-11-19 09:42:00,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-19 09:42:00,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-19 09:42:00,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 591 transitions. [2024-11-19 09:42:00,728 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49747474747474746 [2024-11-19 09:42:00,728 INFO L175 Difference]: Start difference. First operand has 161 places, 160 transitions, 346 flow. Second operand 6 states and 591 transitions. [2024-11-19 09:42:00,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 163 transitions, 514 flow [2024-11-19 09:42:00,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 163 transitions, 510 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-19 09:42:00,736 INFO L231 Difference]: Finished difference. Result has 168 places, 163 transitions, 378 flow [2024-11-19 09:42:00,737 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=378, PETRI_PLACES=168, PETRI_TRANSITIONS=163} [2024-11-19 09:42:00,737 INFO L277 CegarLoopForPetriNet]: 161 programPoint places, 7 predicate places. [2024-11-19 09:42:00,737 INFO L471 AbstractCegarLoop]: Abstraction has has 168 places, 163 transitions, 378 flow [2024-11-19 09:42:00,738 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 86.28571428571429) internal successors, (604), 7 states have internal predecessors, (604), 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) [2024-11-19 09:42:00,738 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:42:00,738 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2024-11-19 09:42:00,760 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-19 09:42:00,945 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:42:00,946 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-19 09:42:00,946 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:42:00,946 INFO L85 PathProgramCache]: Analyzing trace with hash 201694515, now seen corresponding path program 2 times [2024-11-19 09:42:00,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:42:00,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963684659] [2024-11-19 09:42:00,947 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:42:00,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:42:00,962 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-19 09:42:00,962 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:42:00,997 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-19 09:42:00,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:42:00,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963684659] [2024-11-19 09:42:00,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963684659] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:42:00,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:42:00,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 09:42:00,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106064188] [2024-11-19 09:42:00,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:42:00,999 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 09:42:00,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:42:01,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 09:42:01,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 09:42:01,035 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 198 [2024-11-19 09:42:01,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 163 transitions, 378 flow. Second operand has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 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) [2024-11-19 09:42:01,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:42:01,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 198 [2024-11-19 09:42:01,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:42:05,090 INFO L124 PetriNetUnfolderBase]: 26873/58444 cut-off events. [2024-11-19 09:42:05,091 INFO L125 PetriNetUnfolderBase]: For 120/120 co-relation queries the response was YES. [2024-11-19 09:42:05,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98482 conditions, 58444 events. 26873/58444 cut-off events. For 120/120 co-relation queries the response was YES. Maximal size of possible extension queue 1690. Compared 647153 event pairs, 23226 based on Foata normal form. 0/52403 useless extension candidates. Maximal degree in co-relation 98447. Up to 36847 conditions per place. [2024-11-19 09:42:05,508 INFO L140 encePairwiseOnDemand]: 194/198 looper letters, 120 selfloop transitions, 2 changer transitions 0/203 dead transitions. [2024-11-19 09:42:05,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 203 transitions, 702 flow [2024-11-19 09:42:05,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 09:42:05,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 09:42:05,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 363 transitions. [2024-11-19 09:42:05,512 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-11-19 09:42:05,512 INFO L175 Difference]: Start difference. First operand has 168 places, 163 transitions, 378 flow. Second operand 3 states and 363 transitions. [2024-11-19 09:42:05,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 203 transitions, 702 flow [2024-11-19 09:42:05,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 203 transitions, 688 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-11-19 09:42:05,517 INFO L231 Difference]: Finished difference. Result has 167 places, 161 transitions, 364 flow [2024-11-19 09:42:05,518 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=360, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=364, PETRI_PLACES=167, PETRI_TRANSITIONS=161} [2024-11-19 09:42:05,519 INFO L277 CegarLoopForPetriNet]: 161 programPoint places, 6 predicate places. [2024-11-19 09:42:05,519 INFO L471 AbstractCegarLoop]: Abstraction has has 167 places, 161 transitions, 364 flow [2024-11-19 09:42:05,520 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 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) [2024-11-19 09:42:05,520 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:42:05,520 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2024-11-19 09:42:05,520 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-19 09:42:05,520 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-19 09:42:05,521 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:42:05,521 INFO L85 PathProgramCache]: Analyzing trace with hash 201694516, now seen corresponding path program 1 times [2024-11-19 09:42:05,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:42:05,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578548927] [2024-11-19 09:42:05,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:42:05,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:42:05,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:42:05,611 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:42:05,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:42:05,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578548927] [2024-11-19 09:42:05,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578548927] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:42:05,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531508331] [2024-11-19 09:42:05,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:42:05,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:42:05,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:42:05,613 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:42:05,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-19 09:42:05,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:42:05,713 INFO L255 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-19 09:42:05,714 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:42:05,734 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:42:05,734 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:42:05,789 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:42:05,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531508331] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:42:05,790 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:42:05,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-11-19 09:42:05,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194365318] [2024-11-19 09:42:05,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:42:05,791 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-19 09:42:05,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:42:05,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-19 09:42:05,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-11-19 09:42:05,793 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 198 [2024-11-19 09:42:05,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 161 transitions, 364 flow. Second operand has 13 states, 13 states have (on average 86.15384615384616) internal successors, (1120), 13 states have internal predecessors, (1120), 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) [2024-11-19 09:42:05,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:42:05,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 198 [2024-11-19 09:42:05,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:42:10,126 INFO L124 PetriNetUnfolderBase]: 24909/55039 cut-off events. [2024-11-19 09:42:10,126 INFO L125 PetriNetUnfolderBase]: For 440/462 co-relation queries the response was YES. [2024-11-19 09:42:10,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92651 conditions, 55039 events. 24909/55039 cut-off events. For 440/462 co-relation queries the response was YES. Maximal size of possible extension queue 1630. Compared 611509 event pairs, 23247 based on Foata normal form. 6/48962 useless extension candidates. Maximal degree in co-relation 92598. Up to 36926 conditions per place. [2024-11-19 09:42:10,454 INFO L140 encePairwiseOnDemand]: 195/198 looper letters, 73 selfloop transitions, 11 changer transitions 0/167 dead transitions. [2024-11-19 09:42:10,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 167 transitions, 568 flow [2024-11-19 09:42:10,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-19 09:42:10,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-19 09:42:10,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1110 transitions. [2024-11-19 09:42:10,457 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4671717171717172 [2024-11-19 09:42:10,457 INFO L175 Difference]: Start difference. First operand has 167 places, 161 transitions, 364 flow. Second operand 12 states and 1110 transitions. [2024-11-19 09:42:10,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 167 transitions, 568 flow [2024-11-19 09:42:10,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 167 transitions, 564 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 09:42:10,495 INFO L231 Difference]: Finished difference. Result has 182 places, 167 transitions, 444 flow [2024-11-19 09:42:10,495 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=360, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=444, PETRI_PLACES=182, PETRI_TRANSITIONS=167} [2024-11-19 09:42:10,496 INFO L277 CegarLoopForPetriNet]: 161 programPoint places, 21 predicate places. [2024-11-19 09:42:10,496 INFO L471 AbstractCegarLoop]: Abstraction has has 182 places, 167 transitions, 444 flow [2024-11-19 09:42:10,497 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 86.15384615384616) internal successors, (1120), 13 states have internal predecessors, (1120), 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) [2024-11-19 09:42:10,497 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:42:10,497 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1] [2024-11-19 09:42:10,514 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-19 09:42:10,701 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-19 09:42:10,702 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-19 09:42:10,702 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:42:10,702 INFO L85 PathProgramCache]: Analyzing trace with hash -763770572, now seen corresponding path program 2 times [2024-11-19 09:42:10,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:42:10,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820727934] [2024-11-19 09:42:10,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:42:10,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:42:10,719 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-19 09:42:10,720 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:42:10,768 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-11-19 09:42:10,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:42:10,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820727934] [2024-11-19 09:42:10,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820727934] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:42:10,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:42:10,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 09:42:10,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801374398] [2024-11-19 09:42:10,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:42:10,770 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 09:42:10,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:42:10,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 09:42:10,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 09:42:10,806 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 198 [2024-11-19 09:42:10,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 167 transitions, 444 flow. Second operand has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 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) [2024-11-19 09:42:10,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:42:10,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 198 [2024-11-19 09:42:10,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:42:15,082 INFO L124 PetriNetUnfolderBase]: 25299/56215 cut-off events. [2024-11-19 09:42:15,083 INFO L125 PetriNetUnfolderBase]: For 280/302 co-relation queries the response was YES. [2024-11-19 09:42:15,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94225 conditions, 56215 events. 25299/56215 cut-off events. For 280/302 co-relation queries the response was YES. Maximal size of possible extension queue 1702. Compared 635179 event pairs, 11634 based on Foata normal form. 1/50162 useless extension candidates. Maximal degree in co-relation 94148. Up to 37810 conditions per place. [2024-11-19 09:42:15,518 INFO L140 encePairwiseOnDemand]: 194/198 looper letters, 106 selfloop transitions, 2 changer transitions 0/190 dead transitions. [2024-11-19 09:42:15,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 190 transitions, 706 flow [2024-11-19 09:42:15,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 09:42:15,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 09:42:15,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 352 transitions. [2024-11-19 09:42:15,521 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5925925925925926 [2024-11-19 09:42:15,521 INFO L175 Difference]: Start difference. First operand has 182 places, 167 transitions, 444 flow. Second operand 3 states and 352 transitions. [2024-11-19 09:42:15,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 190 transitions, 706 flow [2024-11-19 09:42:15,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 190 transitions, 658 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-11-19 09:42:15,530 INFO L231 Difference]: Finished difference. Result has 180 places, 168 transitions, 410 flow [2024-11-19 09:42:15,530 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=396, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=410, PETRI_PLACES=180, PETRI_TRANSITIONS=168} [2024-11-19 09:42:15,531 INFO L277 CegarLoopForPetriNet]: 161 programPoint places, 19 predicate places. [2024-11-19 09:42:15,532 INFO L471 AbstractCegarLoop]: Abstraction has has 180 places, 168 transitions, 410 flow [2024-11-19 09:42:15,532 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 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) [2024-11-19 09:42:15,532 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:42:15,532 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1] [2024-11-19 09:42:15,532 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-19 09:42:15,533 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-19 09:42:15,533 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:42:15,533 INFO L85 PathProgramCache]: Analyzing trace with hash 54045576, now seen corresponding path program 1 times [2024-11-19 09:42:15,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:42:15,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307845625] [2024-11-19 09:42:15,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:42:15,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:42:15,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:42:15,749 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-11-19 09:42:15,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:42:15,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307845625] [2024-11-19 09:42:15,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307845625] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:42:15,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130716407] [2024-11-19 09:42:15,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:42:15,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:42:15,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:42:15,752 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:42:15,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-19 09:42:15,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:42:15,872 INFO L255 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-19 09:42:15,873 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:42:15,887 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 [2024-11-19 09:42:15,930 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-11-19 09:42:15,930 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:42:15,979 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-11-19 09:42:15,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130716407] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:42:15,980 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:42:15,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-11-19 09:42:15,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133323809] [2024-11-19 09:42:15,981 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:42:15,981 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-19 09:42:15,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:42:15,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-19 09:42:15,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-11-19 09:42:16,106 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 198 [2024-11-19 09:42:16,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 168 transitions, 410 flow. Second operand has 7 states, 7 states have (on average 85.71428571428571) internal successors, (600), 7 states have internal predecessors, (600), 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) [2024-11-19 09:42:16,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:42:16,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 198 [2024-11-19 09:42:16,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:42:20,314 INFO L124 PetriNetUnfolderBase]: 24660/52921 cut-off events. [2024-11-19 09:42:20,314 INFO L125 PetriNetUnfolderBase]: For 1264/1264 co-relation queries the response was YES. [2024-11-19 09:42:20,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91095 conditions, 52921 events. 24660/52921 cut-off events. For 1264/1264 co-relation queries the response was YES. Maximal size of possible extension queue 1613. Compared 583044 event pairs, 337 based on Foata normal form. 528/48521 useless extension candidates. Maximal degree in co-relation 91041. Up to 31632 conditions per place. [2024-11-19 09:42:20,763 INFO L140 encePairwiseOnDemand]: 194/198 looper letters, 191 selfloop transitions, 4 changer transitions 0/276 dead transitions. [2024-11-19 09:42:20,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 276 transitions, 1014 flow [2024-11-19 09:42:20,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:42:20,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:42:20,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 603 transitions. [2024-11-19 09:42:20,765 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6090909090909091 [2024-11-19 09:42:20,765 INFO L175 Difference]: Start difference. First operand has 180 places, 168 transitions, 410 flow. Second operand 5 states and 603 transitions. [2024-11-19 09:42:20,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 276 transitions, 1014 flow [2024-11-19 09:42:20,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 276 transitions, 1012 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-19 09:42:20,778 INFO L231 Difference]: Finished difference. Result has 182 places, 167 transitions, 412 flow [2024-11-19 09:42:20,779 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=404, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=412, PETRI_PLACES=182, PETRI_TRANSITIONS=167} [2024-11-19 09:42:20,779 INFO L277 CegarLoopForPetriNet]: 161 programPoint places, 21 predicate places. [2024-11-19 09:42:20,779 INFO L471 AbstractCegarLoop]: Abstraction has has 182 places, 167 transitions, 412 flow [2024-11-19 09:42:20,780 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 85.71428571428571) internal successors, (600), 7 states have internal predecessors, (600), 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) [2024-11-19 09:42:20,780 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:42:20,780 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:42:20,794 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-19 09:42:20,980 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:42:20,981 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-19 09:42:20,981 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:42:20,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1326677704, now seen corresponding path program 1 times [2024-11-19 09:42:20,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:42:20,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820829081] [2024-11-19 09:42:20,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:42:20,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:42:21,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:42:21,203 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-11-19 09:42:21,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:42:21,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820829081] [2024-11-19 09:42:21,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820829081] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:42:21,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:42:21,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 09:42:21,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268352585] [2024-11-19 09:42:21,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:42:21,206 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 09:42:21,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:42:21,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 09:42:21,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-19 09:42:21,311 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 198 [2024-11-19 09:42:21,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 167 transitions, 412 flow. Second operand has 5 states, 5 states have (on average 70.6) internal successors, (353), 5 states have internal predecessors, (353), 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) [2024-11-19 09:42:21,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:42:21,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 198 [2024-11-19 09:42:21,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:42:26,292 INFO L124 PetriNetUnfolderBase]: 28497/59891 cut-off events. [2024-11-19 09:42:26,293 INFO L125 PetriNetUnfolderBase]: For 3119/3119 co-relation queries the response was YES. [2024-11-19 09:42:26,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104649 conditions, 59891 events. 28497/59891 cut-off events. For 3119/3119 co-relation queries the response was YES. Maximal size of possible extension queue 1563. Compared 640632 event pairs, 23133 based on Foata normal form. 0/56234 useless extension candidates. Maximal degree in co-relation 104595. Up to 35942 conditions per place. [2024-11-19 09:42:26,839 INFO L140 encePairwiseOnDemand]: 171/198 looper letters, 170 selfloop transitions, 12 changer transitions 0/247 dead transitions. [2024-11-19 09:42:26,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 247 transitions, 936 flow [2024-11-19 09:42:26,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 09:42:26,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 09:42:26,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 468 transitions. [2024-11-19 09:42:26,842 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5909090909090909 [2024-11-19 09:42:26,842 INFO L175 Difference]: Start difference. First operand has 182 places, 167 transitions, 412 flow. Second operand 4 states and 468 transitions. [2024-11-19 09:42:26,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 247 transitions, 936 flow [2024-11-19 09:42:26,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 247 transitions, 926 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-11-19 09:42:26,847 INFO L231 Difference]: Finished difference. Result has 180 places, 172 transitions, 520 flow [2024-11-19 09:42:26,848 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=392, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=520, PETRI_PLACES=180, PETRI_TRANSITIONS=172} [2024-11-19 09:42:26,848 INFO L277 CegarLoopForPetriNet]: 161 programPoint places, 19 predicate places. [2024-11-19 09:42:26,848 INFO L471 AbstractCegarLoop]: Abstraction has has 180 places, 172 transitions, 520 flow [2024-11-19 09:42:26,849 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 70.6) internal successors, (353), 5 states have internal predecessors, (353), 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) [2024-11-19 09:42:26,849 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:42:26,849 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 3, 3, 2, 1, 1, 1, 1, 1] [2024-11-19 09:42:26,849 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-19 09:42:26,849 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-19 09:42:26,849 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:42:26,850 INFO L85 PathProgramCache]: Analyzing trace with hash 813716292, now seen corresponding path program 1 times [2024-11-19 09:42:26,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:42:26,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957881536] [2024-11-19 09:42:26,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:42:26,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:42:26,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-19 09:42:26,881 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-19 09:42:26,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-19 09:42:26,908 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-19 09:42:26,912 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-19 09:42:26,912 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (49 of 50 remaining) [2024-11-19 09:42:26,912 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 50 remaining) [2024-11-19 09:42:26,912 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 50 remaining) [2024-11-19 09:42:26,913 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 50 remaining) [2024-11-19 09:42:26,913 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 50 remaining) [2024-11-19 09:42:26,913 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK (44 of 50 remaining) [2024-11-19 09:42:26,913 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 50 remaining) [2024-11-19 09:42:26,913 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 50 remaining) [2024-11-19 09:42:26,913 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 50 remaining) [2024-11-19 09:42:26,913 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 50 remaining) [2024-11-19 09:42:26,913 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 50 remaining) [2024-11-19 09:42:26,914 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 50 remaining) [2024-11-19 09:42:26,914 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 50 remaining) [2024-11-19 09:42:26,914 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 50 remaining) [2024-11-19 09:42:26,914 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 50 remaining) [2024-11-19 09:42:26,914 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 50 remaining) [2024-11-19 09:42:26,914 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK (33 of 50 remaining) [2024-11-19 09:42:26,914 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 50 remaining) [2024-11-19 09:42:26,915 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 50 remaining) [2024-11-19 09:42:26,915 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 50 remaining) [2024-11-19 09:42:26,915 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 50 remaining) [2024-11-19 09:42:26,915 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 50 remaining) [2024-11-19 09:42:26,915 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 50 remaining) [2024-11-19 09:42:26,915 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 50 remaining) [2024-11-19 09:42:26,915 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 50 remaining) [2024-11-19 09:42:26,915 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 50 remaining) [2024-11-19 09:42:26,915 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 50 remaining) [2024-11-19 09:42:26,916 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (22 of 50 remaining) [2024-11-19 09:42:26,916 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 50 remaining) [2024-11-19 09:42:26,916 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 50 remaining) [2024-11-19 09:42:26,916 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 50 remaining) [2024-11-19 09:42:26,916 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 50 remaining) [2024-11-19 09:42:26,916 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 50 remaining) [2024-11-19 09:42:26,916 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 50 remaining) [2024-11-19 09:42:26,916 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 50 remaining) [2024-11-19 09:42:26,916 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 50 remaining) [2024-11-19 09:42:26,917 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 50 remaining) [2024-11-19 09:42:26,917 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 50 remaining) [2024-11-19 09:42:26,917 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (11 of 50 remaining) [2024-11-19 09:42:26,917 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 50 remaining) [2024-11-19 09:42:26,917 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 50 remaining) [2024-11-19 09:42:26,917 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 50 remaining) [2024-11-19 09:42:26,917 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 50 remaining) [2024-11-19 09:42:26,917 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 50 remaining) [2024-11-19 09:42:26,918 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 50 remaining) [2024-11-19 09:42:26,918 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 50 remaining) [2024-11-19 09:42:26,918 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 50 remaining) [2024-11-19 09:42:26,918 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 50 remaining) [2024-11-19 09:42:26,919 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 50 remaining) [2024-11-19 09:42:26,919 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (0 of 50 remaining) [2024-11-19 09:42:26,919 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-19 09:42:26,920 INFO L407 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1] [2024-11-19 09:42:26,921 WARN L244 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-19 09:42:26,921 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-11-19 09:42:26,980 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-19 09:42:26,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 210 places, 259 transitions, 545 flow [2024-11-19 09:42:27,052 INFO L124 PetriNetUnfolderBase]: 100/514 cut-off events. [2024-11-19 09:42:27,053 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-11-19 09:42:27,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 539 conditions, 514 events. 100/514 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 3115 event pairs, 1 based on Foata normal form. 0/301 useless extension candidates. Maximal degree in co-relation 359. Up to 16 conditions per place. [2024-11-19 09:42:27,061 INFO L82 GeneralOperation]: Start removeDead. Operand has 210 places, 259 transitions, 545 flow [2024-11-19 09:42:27,073 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 210 places, 259 transitions, 545 flow [2024-11-19 09:42:27,074 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-19 09:42:27,074 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;@1995120c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-19 09:42:27,074 INFO L334 AbstractCegarLoop]: Starting to check reachability of 61 error locations. [2024-11-19 09:42:27,078 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-19 09:42:27,078 INFO L124 PetriNetUnfolderBase]: 1/6 cut-off events. [2024-11-19 09:42:27,078 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-19 09:42:27,078 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:42:27,078 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-19 09:42:27,079 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2024-11-19 09:42:27,079 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:42:27,079 INFO L85 PathProgramCache]: Analyzing trace with hash 36666867, now seen corresponding path program 1 times [2024-11-19 09:42:27,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:42:27,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015416943] [2024-11-19 09:42:27,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:42:27,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:42:27,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:42:27,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:42:27,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:42:27,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015416943] [2024-11-19 09:42:27,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015416943] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:42:27,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:42:27,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 09:42:27,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104897031] [2024-11-19 09:42:27,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:42:27,129 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 09:42:27,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:42:27,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 09:42:27,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 09:42:27,130 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 259 [2024-11-19 09:42:27,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 259 transitions, 545 flow. Second operand has 3 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 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) [2024-11-19 09:42:27,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:42:27,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 259 [2024-11-19 09:42:27,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand