./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/pthread/twostage_3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version c7c6ca5d 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/pthread/twostage_3.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 1032ef3fe166161226ca7e81ea27802cfc3f516ad1e4b45c387461fe1ddeccf8 --- Real Ultimate output --- This is Ultimate 0.2.5-?-c7c6ca5-m [2024-11-09 10:22:36,059 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 10:22:36,134 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-09 10:22:36,140 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 10:22:36,141 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 10:22:36,173 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 10:22:36,174 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 10:22:36,174 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 10:22:36,175 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-09 10:22:36,176 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-09 10:22:36,176 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 10:22:36,177 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 10:22:36,177 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-09 10:22:36,178 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-09 10:22:36,180 INFO L153 SettingsManager]: * Use SBE=true [2024-11-09 10:22:36,180 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 10:22:36,181 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 10:22:36,181 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 10:22:36,181 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 10:22:36,181 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 10:22:36,182 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-09 10:22:36,182 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-09 10:22:36,182 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-09 10:22:36,183 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 10:22:36,183 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-09 10:22:36,184 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 10:22:36,185 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-09 10:22:36,185 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 10:22:36,185 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 10:22:36,188 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 10:22:36,188 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-09 10:22:36,189 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 10:22:36,189 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 10:22:36,189 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 10:22:36,189 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 10:22:36,189 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 10:22:36,190 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-09 10:22:36,190 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 10:22:36,190 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 10:22:36,191 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-09 10:22:36,191 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-09 10:22:36,191 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 10:22:36,192 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1032ef3fe166161226ca7e81ea27802cfc3f516ad1e4b45c387461fe1ddeccf8 [2024-11-09 10:22:36,438 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 10:22:36,467 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 10:22:36,471 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 10:22:36,472 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 10:22:36,472 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 10:22:36,474 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread/twostage_3.i [2024-11-09 10:22:37,950 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 10:22:38,243 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 10:22:38,244 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/twostage_3.i [2024-11-09 10:22:38,266 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4538b9a4d/a0aab66d28c8442c8c51dfb282d039d9/FLAG1e5172a26 [2024-11-09 10:22:38,521 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4538b9a4d/a0aab66d28c8442c8c51dfb282d039d9 [2024-11-09 10:22:38,524 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 10:22:38,525 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 10:22:38,526 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 10:22:38,526 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 10:22:38,530 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 10:22:38,531 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:22:38" (1/1) ... [2024-11-09 10:22:38,532 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69243c54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:22:38, skipping insertion in model container [2024-11-09 10:22:38,532 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:22:38" (1/1) ... [2024-11-09 10:22:38,584 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 10:22:39,159 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-09 10:22:39,160 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-09 10:22:39,175 WARN L1674 CHandler]: Possible shadowing of function lock [2024-11-09 10:22:39,176 WARN L1674 CHandler]: Possible shadowing of function lock [2024-11-09 10:22:39,177 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 10:22:39,188 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 10:22:39,251 WARN L1674 CHandler]: Possible shadowing of function lock [2024-11-09 10:22:39,255 WARN L1674 CHandler]: Possible shadowing of function lock [2024-11-09 10:22:39,255 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 10:22:39,328 INFO L204 MainTranslator]: Completed translation [2024-11-09 10:22:39,329 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:22:39 WrapperNode [2024-11-09 10:22:39,329 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 10:22:39,330 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 10:22:39,330 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 10:22:39,330 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 10:22:39,337 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:22:39" (1/1) ... [2024-11-09 10:22:39,364 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:22:39" (1/1) ... [2024-11-09 10:22:39,392 INFO L138 Inliner]: procedures = 373, calls = 34, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 175 [2024-11-09 10:22:39,393 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 10:22:39,394 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 10:22:39,394 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 10:22:39,394 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 10:22:39,404 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:22:39" (1/1) ... [2024-11-09 10:22:39,404 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:22:39" (1/1) ... [2024-11-09 10:22:39,407 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:22:39" (1/1) ... [2024-11-09 10:22:39,427 INFO L175 MemorySlicer]: Split 6 memory accesses to 3 slices as follows [2, 2, 2]. 33 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2024-11-09 10:22:39,427 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:22:39" (1/1) ... [2024-11-09 10:22:39,428 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:22:39" (1/1) ... [2024-11-09 10:22:39,436 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:22:39" (1/1) ... [2024-11-09 10:22:39,439 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:22:39" (1/1) ... [2024-11-09 10:22:39,441 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:22:39" (1/1) ... [2024-11-09 10:22:39,443 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:22:39" (1/1) ... [2024-11-09 10:22:39,446 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 10:22:39,446 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 10:22:39,447 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 10:22:39,447 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 10:22:39,448 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:22:39" (1/1) ... [2024-11-09 10:22:39,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 10:22:39,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:22:39,487 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) [2024-11-09 10:22:39,488 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 [2024-11-09 10:22:39,543 INFO L130 BoogieDeclarations]: Found specification of procedure funcA [2024-11-09 10:22:39,543 INFO L138 BoogieDeclarations]: Found implementation of procedure funcA [2024-11-09 10:22:39,543 INFO L130 BoogieDeclarations]: Found specification of procedure funcB [2024-11-09 10:22:39,543 INFO L138 BoogieDeclarations]: Found implementation of procedure funcB [2024-11-09 10:22:39,543 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-09 10:22:39,543 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-09 10:22:39,543 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-11-09 10:22:39,544 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-09 10:22:39,544 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-09 10:22:39,544 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-09 10:22:39,544 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-09 10:22:39,544 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-09 10:22:39,544 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-09 10:22:39,546 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-11-09 10:22:39,546 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-09 10:22:39,546 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 10:22:39,546 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-09 10:22:39,546 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-09 10:22:39,547 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-09 10:22:39,547 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 10:22:39,547 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 10:22:39,548 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-09 10:22:39,687 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 10:22:39,688 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 10:22:39,988 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-09 10:22:39,989 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 10:22:40,235 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 10:22:40,235 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-09 10:22:40,236 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:22:40 BoogieIcfgContainer [2024-11-09 10:22:40,236 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 10:22:40,238 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 10:22:40,238 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 10:22:40,242 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 10:22:40,242 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 10:22:38" (1/3) ... [2024-11-09 10:22:40,243 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6986583d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:22:40, skipping insertion in model container [2024-11-09 10:22:40,243 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:22:39" (2/3) ... [2024-11-09 10:22:40,244 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6986583d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:22:40, skipping insertion in model container [2024-11-09 10:22:40,244 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:22:40" (3/3) ... [2024-11-09 10:22:40,245 INFO L112 eAbstractionObserver]: Analyzing ICFG twostage_3.i [2024-11-09 10:22:40,263 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 10:22:40,263 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 12 error locations. [2024-11-09 10:22:40,263 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-09 10:22:40,316 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-11-09 10:22:40,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 75 places, 79 transitions, 178 flow [2024-11-09 10:22:40,415 INFO L124 PetriNetUnfolderBase]: 16/168 cut-off events. [2024-11-09 10:22:40,416 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-11-09 10:22:40,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 185 conditions, 168 events. 16/168 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 805 event pairs, 0 based on Foata normal form. 0/108 useless extension candidates. Maximal degree in co-relation 86. Up to 7 conditions per place. [2024-11-09 10:22:40,420 INFO L82 GeneralOperation]: Start removeDead. Operand has 75 places, 79 transitions, 178 flow [2024-11-09 10:22:40,425 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 75 places, 79 transitions, 178 flow [2024-11-09 10:22:40,434 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 10:22:40,440 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;@7c9e9a0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 10:22:40,441 INFO L334 AbstractCegarLoop]: Starting to check reachability of 15 error locations. [2024-11-09 10:22:40,444 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-09 10:22:40,444 INFO L124 PetriNetUnfolderBase]: 1/6 cut-off events. [2024-11-09 10:22:40,444 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-09 10:22:40,445 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:22:40,446 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-09 10:22:40,446 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-09 10:22:40,452 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:22:40,452 INFO L85 PathProgramCache]: Analyzing trace with hash 16582774, now seen corresponding path program 1 times [2024-11-09 10:22:40,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:22:40,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055863118] [2024-11-09 10:22:40,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:22:40,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:22:40,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:22:40,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:22:40,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:22:40,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055863118] [2024-11-09 10:22:40,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055863118] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:22:40,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:22:40,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-09 10:22:40,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212964525] [2024-11-09 10:22:40,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:22:40,654 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-09 10:22:40,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:22:40,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-09 10:22:40,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-09 10:22:40,686 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 79 [2024-11-09 10:22:40,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 79 transitions, 178 flow. Second operand has 2 states, 2 states have (on average 32.0) internal successors, (64), 2 states have internal predecessors, (64), 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) [2024-11-09 10:22:40,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:22:40,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 79 [2024-11-09 10:22:40,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:22:41,251 INFO L124 PetriNetUnfolderBase]: 1878/3765 cut-off events. [2024-11-09 10:22:41,252 INFO L125 PetriNetUnfolderBase]: For 116/116 co-relation queries the response was YES. [2024-11-09 10:22:41,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6822 conditions, 3765 events. 1878/3765 cut-off events. For 116/116 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 24618 event pairs, 1757 based on Foata normal form. 180/3673 useless extension candidates. Maximal degree in co-relation 6241. Up to 2976 conditions per place. [2024-11-09 10:22:41,315 INFO L140 encePairwiseOnDemand]: 74/79 looper letters, 42 selfloop transitions, 0 changer transitions 0/73 dead transitions. [2024-11-09 10:22:41,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 73 transitions, 250 flow [2024-11-09 10:22:41,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-09 10:22:41,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-11-09 10:22:41,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 109 transitions. [2024-11-09 10:22:41,328 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.689873417721519 [2024-11-09 10:22:41,330 INFO L175 Difference]: Start difference. First operand has 75 places, 79 transitions, 178 flow. Second operand 2 states and 109 transitions. [2024-11-09 10:22:41,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 73 transitions, 250 flow [2024-11-09 10:22:41,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 73 transitions, 250 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-09 10:22:41,343 INFO L231 Difference]: Finished difference. Result has 73 places, 73 transitions, 166 flow [2024-11-09 10:22:41,345 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=166, PETRI_PLACES=73, PETRI_TRANSITIONS=73} [2024-11-09 10:22:41,349 INFO L277 CegarLoopForPetriNet]: 75 programPoint places, -2 predicate places. [2024-11-09 10:22:41,349 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 73 transitions, 166 flow [2024-11-09 10:22:41,349 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 32.0) internal successors, (64), 2 states have internal predecessors, (64), 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) [2024-11-09 10:22:41,350 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:22:41,350 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-11-09 10:22:41,350 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 10:22:41,350 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-09 10:22:41,351 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:22:41,351 INFO L85 PathProgramCache]: Analyzing trace with hash 514120305, now seen corresponding path program 1 times [2024-11-09 10:22:41,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:22:41,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983688723] [2024-11-09 10:22:41,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:22:41,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:22:41,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:22:41,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:22:41,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:22:41,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983688723] [2024-11-09 10:22:41,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983688723] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:22:41,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:22:41,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 10:22:41,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558322684] [2024-11-09 10:22:41,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:22:41,627 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 10:22:41,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:22:41,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 10:22:41,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 10:22:41,672 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 79 [2024-11-09 10:22:41,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 73 transitions, 166 flow. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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) [2024-11-09 10:22:41,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:22:41,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 79 [2024-11-09 10:22:41,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:22:42,169 INFO L124 PetriNetUnfolderBase]: 2141/4236 cut-off events. [2024-11-09 10:22:42,169 INFO L125 PetriNetUnfolderBase]: For 115/123 co-relation queries the response was YES. [2024-11-09 10:22:42,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7736 conditions, 4236 events. 2141/4236 cut-off events. For 115/123 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 29270 event pairs, 1506 based on Foata normal form. 8/3998 useless extension candidates. Maximal degree in co-relation 7731. Up to 2578 conditions per place. [2024-11-09 10:22:42,198 INFO L140 encePairwiseOnDemand]: 75/79 looper letters, 63 selfloop transitions, 2 changer transitions 0/92 dead transitions. [2024-11-09 10:22:42,199 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 92 transitions, 334 flow [2024-11-09 10:22:42,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 10:22:42,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-09 10:22:42,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 148 transitions. [2024-11-09 10:22:42,202 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6244725738396625 [2024-11-09 10:22:42,203 INFO L175 Difference]: Start difference. First operand has 73 places, 73 transitions, 166 flow. Second operand 3 states and 148 transitions. [2024-11-09 10:22:42,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 92 transitions, 334 flow [2024-11-09 10:22:42,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 92 transitions, 334 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-09 10:22:42,208 INFO L231 Difference]: Finished difference. Result has 73 places, 71 transitions, 166 flow [2024-11-09 10:22:42,209 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=166, PETRI_PLACES=73, PETRI_TRANSITIONS=71} [2024-11-09 10:22:42,210 INFO L277 CegarLoopForPetriNet]: 75 programPoint places, -2 predicate places. [2024-11-09 10:22:42,210 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 71 transitions, 166 flow [2024-11-09 10:22:42,211 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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) [2024-11-09 10:22:42,211 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:22:42,212 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-11-09 10:22:42,212 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 10:22:42,212 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-09 10:22:42,213 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:22:42,214 INFO L85 PathProgramCache]: Analyzing trace with hash 514120306, now seen corresponding path program 1 times [2024-11-09 10:22:42,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:22:42,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772512580] [2024-11-09 10:22:42,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:22:42,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:22:42,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:22:42,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:22:42,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:22:42,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772512580] [2024-11-09 10:22:42,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772512580] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:22:42,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:22:42,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 10:22:42,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585537037] [2024-11-09 10:22:42,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:22:42,538 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 10:22:42,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:22:42,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 10:22:42,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-09 10:22:42,598 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 79 [2024-11-09 10:22:42,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 71 transitions, 166 flow. Second operand has 5 states, 5 states have (on average 29.8) internal successors, (149), 5 states have internal predecessors, (149), 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) [2024-11-09 10:22:42,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:22:42,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 79 [2024-11-09 10:22:42,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:22:43,568 INFO L124 PetriNetUnfolderBase]: 4304/8666 cut-off events. [2024-11-09 10:22:43,569 INFO L125 PetriNetUnfolderBase]: For 512/512 co-relation queries the response was YES. [2024-11-09 10:22:43,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15903 conditions, 8666 events. 4304/8666 cut-off events. For 512/512 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 68024 event pairs, 3633 based on Foata normal form. 1/8163 useless extension candidates. Maximal degree in co-relation 15897. Up to 3417 conditions per place. [2024-11-09 10:22:43,638 INFO L140 encePairwiseOnDemand]: 73/79 looper letters, 93 selfloop transitions, 4 changer transitions 0/124 dead transitions. [2024-11-09 10:22:43,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 124 transitions, 488 flow [2024-11-09 10:22:43,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:22:43,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:22:43,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 215 transitions. [2024-11-09 10:22:43,642 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.680379746835443 [2024-11-09 10:22:43,643 INFO L175 Difference]: Start difference. First operand has 73 places, 71 transitions, 166 flow. Second operand 4 states and 215 transitions. [2024-11-09 10:22:43,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 124 transitions, 488 flow [2024-11-09 10:22:43,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 124 transitions, 480 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:22:43,653 INFO L231 Difference]: Finished difference. Result has 76 places, 73 transitions, 188 flow [2024-11-09 10:22:43,654 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=188, PETRI_PLACES=76, PETRI_TRANSITIONS=73} [2024-11-09 10:22:43,655 INFO L277 CegarLoopForPetriNet]: 75 programPoint places, 1 predicate places. [2024-11-09 10:22:43,655 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 73 transitions, 188 flow [2024-11-09 10:22:43,656 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.8) internal successors, (149), 5 states have internal predecessors, (149), 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) [2024-11-09 10:22:43,656 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:22:43,656 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:22:43,656 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-09 10:22:43,657 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-09 10:22:43,657 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:22:43,658 INFO L85 PathProgramCache]: Analyzing trace with hash -1296173647, now seen corresponding path program 1 times [2024-11-09 10:22:43,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:22:43,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132012914] [2024-11-09 10:22:43,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:22:43,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:22:43,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:22:43,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:22:43,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:22:43,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132012914] [2024-11-09 10:22:43,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132012914] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:22:43,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:22:43,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 10:22:43,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021931828] [2024-11-09 10:22:43,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:22:43,869 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:22:43,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:22:43,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:22:43,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 10:22:43,929 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 79 [2024-11-09 10:22:43,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 73 transitions, 188 flow. Second operand has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 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) [2024-11-09 10:22:43,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:22:43,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 79 [2024-11-09 10:22:43,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:22:44,855 INFO L124 PetriNetUnfolderBase]: 5428/10769 cut-off events. [2024-11-09 10:22:44,855 INFO L125 PetriNetUnfolderBase]: For 304/304 co-relation queries the response was YES. [2024-11-09 10:22:44,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19508 conditions, 10769 events. 5428/10769 cut-off events. For 304/304 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 85665 event pairs, 4070 based on Foata normal form. 1/9656 useless extension candidates. Maximal degree in co-relation 19500. Up to 8440 conditions per place. [2024-11-09 10:22:44,924 INFO L140 encePairwiseOnDemand]: 71/79 looper letters, 72 selfloop transitions, 7 changer transitions 2/105 dead transitions. [2024-11-09 10:22:44,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 105 transitions, 419 flow [2024-11-09 10:22:44,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:22:44,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:22:44,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 185 transitions. [2024-11-09 10:22:44,926 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5854430379746836 [2024-11-09 10:22:44,926 INFO L175 Difference]: Start difference. First operand has 76 places, 73 transitions, 188 flow. Second operand 4 states and 185 transitions. [2024-11-09 10:22:44,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 105 transitions, 419 flow [2024-11-09 10:22:44,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 105 transitions, 417 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-09 10:22:44,930 INFO L231 Difference]: Finished difference. Result has 80 places, 76 transitions, 226 flow [2024-11-09 10:22:44,930 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=226, PETRI_PLACES=80, PETRI_TRANSITIONS=76} [2024-11-09 10:22:44,931 INFO L277 CegarLoopForPetriNet]: 75 programPoint places, 5 predicate places. [2024-11-09 10:22:44,931 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 76 transitions, 226 flow [2024-11-09 10:22:44,931 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 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) [2024-11-09 10:22:44,931 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:22:44,931 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:22:44,932 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-09 10:22:44,932 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-09 10:22:44,932 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:22:44,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1526675220, now seen corresponding path program 1 times [2024-11-09 10:22:44,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:22:44,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991199755] [2024-11-09 10:22:44,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:22:44,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:22:45,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:22:45,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:22:45,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:22:45,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991199755] [2024-11-09 10:22:45,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991199755] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:22:45,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:22:45,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 10:22:45,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708631493] [2024-11-09 10:22:45,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:22:45,058 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 10:22:45,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:22:45,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 10:22:45,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 10:22:45,078 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 79 [2024-11-09 10:22:45,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 76 transitions, 226 flow. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 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) [2024-11-09 10:22:45,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:22:45,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 79 [2024-11-09 10:22:45,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:22:46,026 INFO L124 PetriNetUnfolderBase]: 4781/9625 cut-off events. [2024-11-09 10:22:46,026 INFO L125 PetriNetUnfolderBase]: For 878/878 co-relation queries the response was YES. [2024-11-09 10:22:46,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18240 conditions, 9625 events. 4781/9625 cut-off events. For 878/878 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 79496 event pairs, 3484 based on Foata normal form. 0/9240 useless extension candidates. Maximal degree in co-relation 18230. Up to 5857 conditions per place. [2024-11-09 10:22:46,121 INFO L140 encePairwiseOnDemand]: 75/79 looper letters, 66 selfloop transitions, 4 changer transitions 0/95 dead transitions. [2024-11-09 10:22:46,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 95 transitions, 404 flow [2024-11-09 10:22:46,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 10:22:46,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-09 10:22:46,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 148 transitions. [2024-11-09 10:22:46,123 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6244725738396625 [2024-11-09 10:22:46,124 INFO L175 Difference]: Start difference. First operand has 80 places, 76 transitions, 226 flow. Second operand 3 states and 148 transitions. [2024-11-09 10:22:46,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 95 transitions, 404 flow [2024-11-09 10:22:46,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 95 transitions, 393 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-11-09 10:22:46,130 INFO L231 Difference]: Finished difference. Result has 78 places, 74 transitions, 219 flow [2024-11-09 10:22:46,131 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=211, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=219, PETRI_PLACES=78, PETRI_TRANSITIONS=74} [2024-11-09 10:22:46,131 INFO L277 CegarLoopForPetriNet]: 75 programPoint places, 3 predicate places. [2024-11-09 10:22:46,131 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 74 transitions, 219 flow [2024-11-09 10:22:46,132 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 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) [2024-11-09 10:22:46,132 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:22:46,132 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:22:46,132 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-09 10:22:46,133 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-09 10:22:46,133 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:22:46,133 INFO L85 PathProgramCache]: Analyzing trace with hash -1526675219, now seen corresponding path program 1 times [2024-11-09 10:22:46,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:22:46,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246638183] [2024-11-09 10:22:46,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:22:46,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:22:46,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:22:46,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:22:46,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:22:46,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246638183] [2024-11-09 10:22:46,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246638183] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:22:46,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:22:46,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 10:22:46,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925944724] [2024-11-09 10:22:46,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:22:46,340 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 10:22:46,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:22:46,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 10:22:46,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-09 10:22:46,409 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 79 [2024-11-09 10:22:46,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 74 transitions, 219 flow. Second operand has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 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) [2024-11-09 10:22:46,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:22:46,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 79 [2024-11-09 10:22:46,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:22:47,346 INFO L124 PetriNetUnfolderBase]: 5920/11309 cut-off events. [2024-11-09 10:22:47,347 INFO L125 PetriNetUnfolderBase]: For 1377/1377 co-relation queries the response was YES. [2024-11-09 10:22:47,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22335 conditions, 11309 events. 5920/11309 cut-off events. For 1377/1377 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 92956 event pairs, 1087 based on Foata normal form. 0/10545 useless extension candidates. Maximal degree in co-relation 22325. Up to 3622 conditions per place. [2024-11-09 10:22:47,435 INFO L140 encePairwiseOnDemand]: 66/79 looper letters, 113 selfloop transitions, 16 changer transitions 0/151 dead transitions. [2024-11-09 10:22:47,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 151 transitions, 649 flow [2024-11-09 10:22:47,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 10:22:47,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-09 10:22:47,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 257 transitions. [2024-11-09 10:22:47,437 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6506329113924051 [2024-11-09 10:22:47,437 INFO L175 Difference]: Start difference. First operand has 78 places, 74 transitions, 219 flow. Second operand 5 states and 257 transitions. [2024-11-09 10:22:47,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 151 transitions, 649 flow [2024-11-09 10:22:47,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 151 transitions, 639 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:22:47,525 INFO L231 Difference]: Finished difference. Result has 83 places, 82 transitions, 308 flow [2024-11-09 10:22:47,526 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=211, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=308, PETRI_PLACES=83, PETRI_TRANSITIONS=82} [2024-11-09 10:22:47,526 INFO L277 CegarLoopForPetriNet]: 75 programPoint places, 8 predicate places. [2024-11-09 10:22:47,526 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 82 transitions, 308 flow [2024-11-09 10:22:47,527 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 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) [2024-11-09 10:22:47,527 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:22:47,527 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:22:47,527 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-09 10:22:47,527 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-09 10:22:47,528 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:22:47,528 INFO L85 PathProgramCache]: Analyzing trace with hash 870400787, now seen corresponding path program 1 times [2024-11-09 10:22:47,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:22:47,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554212505] [2024-11-09 10:22:47,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:22:47,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:22:47,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:22:47,791 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:22:47,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:22:47,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554212505] [2024-11-09 10:22:47,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554212505] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:22:47,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685660701] [2024-11-09 10:22:47,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:22:47,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:22:47,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:22:47,794 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) [2024-11-09 10:22:47,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 10:22:47,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:22:47,888 INFO L255 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-09 10:22:47,893 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:22:47,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 10:22:47,972 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2024-11-09 10:22:47,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 10:22:47,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 10:22:47,993 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-09 10:22:47,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 10:22:48,000 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 10:22:48,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 10:22:48,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 10:22:48,015 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-09 10:22:48,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 10:22:48,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 10:22:48,024 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-09 10:22:48,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 10:22:48,032 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 10:22:48,040 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 10:22:48,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 10:22:48,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 10:22:48,051 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-09 10:22:48,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 10:22:48,058 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 10:22:48,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 10:22:48,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 10:22:48,080 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-11-09 10:22:48,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 10:22:48,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 10:22:48,088 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 10:22:48,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 10:22:48,096 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 10:22:48,152 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:22:48,152 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:22:48,259 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 10:22:48,280 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:22:48,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685660701] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:22:48,280 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:22:48,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 4] total 11 [2024-11-09 10:22:48,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412120495] [2024-11-09 10:22:48,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:22:48,281 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-09 10:22:48,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:22:48,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-09 10:22:48,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-11-09 10:22:48,455 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 79 [2024-11-09 10:22:48,456 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 82 transitions, 308 flow. Second operand has 13 states, 13 states have (on average 28.846153846153847) internal successors, (375), 13 states have internal predecessors, (375), 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) [2024-11-09 10:22:48,456 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:22:48,456 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 79 [2024-11-09 10:22:48,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:22:49,177 INFO L124 PetriNetUnfolderBase]: 2556/5107 cut-off events. [2024-11-09 10:22:49,178 INFO L125 PetriNetUnfolderBase]: For 2451/2451 co-relation queries the response was YES. [2024-11-09 10:22:49,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11470 conditions, 5107 events. 2556/5107 cut-off events. For 2451/2451 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 36601 event pairs, 1733 based on Foata normal form. 24/4931 useless extension candidates. Maximal degree in co-relation 11457. Up to 3497 conditions per place. [2024-11-09 10:22:49,217 INFO L140 encePairwiseOnDemand]: 70/79 looper letters, 97 selfloop transitions, 9 changer transitions 0/130 dead transitions. [2024-11-09 10:22:49,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 130 transitions, 624 flow [2024-11-09 10:22:49,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 10:22:49,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-09 10:22:49,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 260 transitions. [2024-11-09 10:22:49,220 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5485232067510548 [2024-11-09 10:22:49,220 INFO L175 Difference]: Start difference. First operand has 83 places, 82 transitions, 308 flow. Second operand 6 states and 260 transitions. [2024-11-09 10:22:49,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 130 transitions, 624 flow [2024-11-09 10:22:49,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 130 transitions, 619 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-09 10:22:49,232 INFO L231 Difference]: Finished difference. Result has 89 places, 83 transitions, 337 flow [2024-11-09 10:22:49,232 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=303, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=337, PETRI_PLACES=89, PETRI_TRANSITIONS=83} [2024-11-09 10:22:49,234 INFO L277 CegarLoopForPetriNet]: 75 programPoint places, 14 predicate places. [2024-11-09 10:22:49,236 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 83 transitions, 337 flow [2024-11-09 10:22:49,236 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 28.846153846153847) internal successors, (375), 13 states have internal predecessors, (375), 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) [2024-11-09 10:22:49,236 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:22:49,236 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2024-11-09 10:22:49,256 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-09 10:22:49,437 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:22:49,438 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-09 10:22:49,439 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:22:49,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1212621137, now seen corresponding path program 1 times [2024-11-09 10:22:49,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:22:49,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452887628] [2024-11-09 10:22:49,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:22:49,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:22:49,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-09 10:22:49,459 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-09 10:22:49,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-09 10:22:49,501 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-09 10:22:49,502 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-09 10:22:49,502 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (14 of 15 remaining) [2024-11-09 10:22:49,505 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX (13 of 15 remaining) [2024-11-09 10:22:49,505 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONARRAY_INDEX (12 of 15 remaining) [2024-11-09 10:22:49,505 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 15 remaining) [2024-11-09 10:22:49,505 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 15 remaining) [2024-11-09 10:22:49,505 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 15 remaining) [2024-11-09 10:22:49,505 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 15 remaining) [2024-11-09 10:22:49,506 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 15 remaining) [2024-11-09 10:22:49,507 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 15 remaining) [2024-11-09 10:22:49,508 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 15 remaining) [2024-11-09 10:22:49,508 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 15 remaining) [2024-11-09 10:22:49,510 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK (3 of 15 remaining) [2024-11-09 10:22:49,510 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 15 remaining) [2024-11-09 10:22:49,510 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location funcBErr0ASSERT_VIOLATIONMEMORY_LEAK (1 of 15 remaining) [2024-11-09 10:22:49,510 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location funcBErr0ASSERT_VIOLATIONMEMORY_LEAK (0 of 15 remaining) [2024-11-09 10:22:49,510 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-09 10:22:49,511 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:22:49,513 WARN L244 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-09 10:22:49,513 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-11-09 10:22:49,546 INFO L143 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2024-11-09 10:22:49,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 113 places, 120 transitions, 284 flow [2024-11-09 10:22:49,610 INFO L124 PetriNetUnfolderBase]: 77/534 cut-off events. [2024-11-09 10:22:49,611 INFO L125 PetriNetUnfolderBase]: For 72/86 co-relation queries the response was YES. [2024-11-09 10:22:49,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 623 conditions, 534 events. 77/534 cut-off events. For 72/86 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 3487 event pairs, 2 based on Foata normal form. 0/350 useless extension candidates. Maximal degree in co-relation 333. Up to 32 conditions per place. [2024-11-09 10:22:49,615 INFO L82 GeneralOperation]: Start removeDead. Operand has 113 places, 120 transitions, 284 flow [2024-11-09 10:22:49,618 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 113 places, 120 transitions, 284 flow [2024-11-09 10:22:49,619 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 10:22:49,620 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;@7c9e9a0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 10:22:49,621 INFO L334 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2024-11-09 10:22:49,622 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-09 10:22:49,622 INFO L124 PetriNetUnfolderBase]: 1/6 cut-off events. [2024-11-09 10:22:49,622 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-09 10:22:49,622 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:22:49,622 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-09 10:22:49,622 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2024-11-09 10:22:49,623 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:22:49,623 INFO L85 PathProgramCache]: Analyzing trace with hash 20215286, now seen corresponding path program 1 times [2024-11-09 10:22:49,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:22:49,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805556858] [2024-11-09 10:22:49,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:22:49,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:22:49,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:22:49,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:22:49,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:22:49,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805556858] [2024-11-09 10:22:49,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805556858] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:22:49,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:22:49,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-09 10:22:49,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587083947] [2024-11-09 10:22:49,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:22:49,637 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-09 10:22:49,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:22:49,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-09 10:22:49,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-09 10:22:49,639 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 120 [2024-11-09 10:22:49,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 120 transitions, 284 flow. Second operand has 2 states, 2 states have (on average 43.0) internal successors, (86), 2 states have internal predecessors, (86), 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) [2024-11-09 10:22:49,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:22:49,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 120 [2024-11-09 10:22:49,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand