/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/forester-heap/dll-rb-cnstr_1-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 12:58:14,126 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 12:58:14,130 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 12:58:14,167 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 12:58:14,168 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 12:58:14,177 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 12:58:14,180 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 12:58:14,184 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 12:58:14,186 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 12:58:14,189 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 12:58:14,190 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 12:58:14,191 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 12:58:14,191 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 12:58:14,194 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 12:58:14,196 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 12:58:14,198 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 12:58:14,199 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 12:58:14,200 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 12:58:14,202 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 12:58:14,210 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 12:58:14,212 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 12:58:14,213 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 12:58:14,214 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 12:58:14,215 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 12:58:14,230 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 12:58:14,230 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 12:58:14,230 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 12:58:14,234 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 12:58:14,235 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 12:58:14,239 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 12:58:14,239 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 12:58:14,240 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 12:58:14,242 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 12:58:14,242 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 12:58:14,243 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 12:58:14,243 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 12:58:14,244 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 12:58:14,244 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 12:58:14,244 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 12:58:14,245 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 12:58:14,246 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 12:58:14,247 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-18 12:58:14,282 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 12:58:14,283 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 12:58:14,285 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 12:58:14,285 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 12:58:14,285 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 12:58:14,285 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 12:58:14,286 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 12:58:14,286 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 12:58:14,286 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 12:58:14,286 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 12:58:14,287 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 12:58:14,287 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 12:58:14,288 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 12:58:14,288 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 12:58:14,288 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 12:58:14,288 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 12:58:14,289 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 12:58:14,289 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 12:58:14,289 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 12:58:14,289 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 12:58:14,289 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 12:58:14,290 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 12:58:14,290 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 12:58:14,290 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 12:58:14,290 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 12:58:14,290 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 12:58:14,291 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 12:58:14,291 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 12:58:14,291 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 12:58:14,291 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=BIGGEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=BIGGEST; [2020-08-18 12:58:14,620 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 12:58:14,635 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 12:58:14,640 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 12:58:14,641 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 12:58:14,642 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 12:58:14,643 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/dll-rb-cnstr_1-2.i [2020-08-18 12:58:14,706 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1e652c67e/615f25a162c04e1cbad99eb96fa218b5/FLAGce198e998 [2020-08-18 12:58:15,289 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 12:58:15,290 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/forester-heap/dll-rb-cnstr_1-2.i [2020-08-18 12:58:15,303 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1e652c67e/615f25a162c04e1cbad99eb96fa218b5/FLAGce198e998 [2020-08-18 12:58:15,543 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1e652c67e/615f25a162c04e1cbad99eb96fa218b5 [2020-08-18 12:58:15,551 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 12:58:15,553 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 12:58:15,554 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 12:58:15,554 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 12:58:15,558 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 12:58:15,559 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 12:58:15" (1/1) ... [2020-08-18 12:58:15,562 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16661b81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:58:15, skipping insertion in model container [2020-08-18 12:58:15,562 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 12:58:15" (1/1) ... [2020-08-18 12:58:15,570 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 12:58:15,612 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 12:58:16,056 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 12:58:16,066 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 12:58:16,116 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 12:58:16,181 INFO L208 MainTranslator]: Completed translation [2020-08-18 12:58:16,183 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:58:16 WrapperNode [2020-08-18 12:58:16,184 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 12:58:16,185 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 12:58:16,185 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 12:58:16,185 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 12:58:16,198 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:58:16" (1/1) ... [2020-08-18 12:58:16,199 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:58:16" (1/1) ... [2020-08-18 12:58:16,217 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:58:16" (1/1) ... [2020-08-18 12:58:16,218 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:58:16" (1/1) ... [2020-08-18 12:58:16,237 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:58:16" (1/1) ... [2020-08-18 12:58:16,244 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:58:16" (1/1) ... [2020-08-18 12:58:16,248 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:58:16" (1/1) ... [2020-08-18 12:58:16,254 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 12:58:16,255 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 12:58:16,255 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 12:58:16,255 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 12:58:16,256 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:58:16" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 12:58:16,319 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 12:58:16,320 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 12:58:16,320 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 12:58:16,320 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-08-18 12:58:16,320 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-08-18 12:58:16,320 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-08-18 12:58:16,321 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-08-18 12:58:16,321 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-08-18 12:58:16,321 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-08-18 12:58:16,321 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-08-18 12:58:16,321 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-08-18 12:58:16,321 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-08-18 12:58:16,322 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-08-18 12:58:16,322 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-08-18 12:58:16,322 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-08-18 12:58:16,322 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-08-18 12:58:16,322 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-08-18 12:58:16,322 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-08-18 12:58:16,323 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-08-18 12:58:16,323 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-08-18 12:58:16,323 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-08-18 12:58:16,323 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-08-18 12:58:16,323 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-08-18 12:58:16,323 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-08-18 12:58:16,324 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-08-18 12:58:16,324 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-08-18 12:58:16,324 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-08-18 12:58:16,324 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-08-18 12:58:16,324 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-08-18 12:58:16,324 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-08-18 12:58:16,325 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-08-18 12:58:16,325 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-08-18 12:58:16,325 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-08-18 12:58:16,325 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-08-18 12:58:16,325 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-08-18 12:58:16,325 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-08-18 12:58:16,326 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-08-18 12:58:16,326 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-08-18 12:58:16,326 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-08-18 12:58:16,326 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-08-18 12:58:16,326 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-08-18 12:58:16,326 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-08-18 12:58:16,327 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-08-18 12:58:16,327 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-08-18 12:58:16,327 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-08-18 12:58:16,327 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-08-18 12:58:16,327 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-08-18 12:58:16,327 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-08-18 12:58:16,328 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-08-18 12:58:16,328 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-08-18 12:58:16,328 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-08-18 12:58:16,328 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-08-18 12:58:16,328 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-08-18 12:58:16,328 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-18 12:58:16,329 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-08-18 12:58:16,329 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-08-18 12:58:16,329 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-18 12:58:16,329 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-08-18 12:58:16,329 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-08-18 12:58:16,329 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-08-18 12:58:16,330 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-08-18 12:58:16,330 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-08-18 12:58:16,330 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-18 12:58:16,330 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-08-18 12:58:16,330 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-08-18 12:58:16,330 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-08-18 12:58:16,331 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-08-18 12:58:16,331 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-08-18 12:58:16,331 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-08-18 12:58:16,331 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-08-18 12:58:16,331 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-08-18 12:58:16,331 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-08-18 12:58:16,331 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-08-18 12:58:16,332 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-08-18 12:58:16,332 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-08-18 12:58:16,332 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-08-18 12:58:16,332 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-08-18 12:58:16,332 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-08-18 12:58:16,332 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-08-18 12:58:16,333 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-08-18 12:58:16,333 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-08-18 12:58:16,333 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-08-18 12:58:16,333 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-08-18 12:58:16,333 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-08-18 12:58:16,333 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-08-18 12:58:16,333 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-08-18 12:58:16,334 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-08-18 12:58:16,334 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-08-18 12:58:16,334 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-08-18 12:58:16,334 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-08-18 12:58:16,334 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-08-18 12:58:16,334 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-08-18 12:58:16,335 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-08-18 12:58:16,335 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-08-18 12:58:16,335 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-08-18 12:58:16,335 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-08-18 12:58:16,335 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-08-18 12:58:16,335 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-08-18 12:58:16,335 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-08-18 12:58:16,335 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-08-18 12:58:16,336 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-08-18 12:58:16,336 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-08-18 12:58:16,336 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-08-18 12:58:16,336 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-08-18 12:58:16,336 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-08-18 12:58:16,336 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-08-18 12:58:16,336 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 12:58:16,337 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 12:58:16,337 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 12:58:16,337 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-18 12:58:16,337 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-18 12:58:16,337 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-18 12:58:16,337 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-18 12:58:16,337 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-18 12:58:16,338 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 12:58:16,338 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 12:58:16,338 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 12:58:16,890 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 12:58:16,890 INFO L295 CfgBuilder]: Removed 9 assume(true) statements. [2020-08-18 12:58:16,894 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 12:58:16 BoogieIcfgContainer [2020-08-18 12:58:16,894 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 12:58:16,896 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 12:58:16,896 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 12:58:16,899 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 12:58:16,899 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 12:58:15" (1/3) ... [2020-08-18 12:58:16,900 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@737765b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 12:58:16, skipping insertion in model container [2020-08-18 12:58:16,900 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:58:16" (2/3) ... [2020-08-18 12:58:16,901 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@737765b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 12:58:16, skipping insertion in model container [2020-08-18 12:58:16,901 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 12:58:16" (3/3) ... [2020-08-18 12:58:16,903 INFO L109 eAbstractionObserver]: Analyzing ICFG dll-rb-cnstr_1-2.i [2020-08-18 12:58:16,913 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 12:58:16,921 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2020-08-18 12:58:16,935 INFO L251 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-08-18 12:58:16,955 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 12:58:16,955 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 12:58:16,955 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 12:58:16,956 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 12:58:16,956 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 12:58:16,956 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 12:58:16,956 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 12:58:16,956 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 12:58:16,975 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2020-08-18 12:58:16,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-08-18 12:58:16,982 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:58:16,983 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:58:16,983 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:58:16,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:58:16,990 INFO L82 PathProgramCache]: Analyzing trace with hash -810798801, now seen corresponding path program 1 times [2020-08-18 12:58:16,999 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:58:16,999 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1368973499] [2020-08-18 12:58:17,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:58:17,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:58:17,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:58:17,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:58:17,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 12:58:17,245 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1368973499] [2020-08-18 12:58:17,249 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 12:58:17,250 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 12:58:17,251 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559811265] [2020-08-18 12:58:17,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 12:58:17,258 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:58:17,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 12:58:17,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 12:58:17,277 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 3 states. [2020-08-18 12:58:17,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:58:17,450 INFO L93 Difference]: Finished difference Result 59 states and 90 transitions. [2020-08-18 12:58:17,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 12:58:17,452 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-08-18 12:58:17,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:58:17,460 INFO L225 Difference]: With dead ends: 59 [2020-08-18 12:58:17,460 INFO L226 Difference]: Without dead ends: 27 [2020-08-18 12:58:17,464 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 12:58:17,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-08-18 12:58:17,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-08-18 12:58:17,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-18 12:58:17,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2020-08-18 12:58:17,496 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 10 [2020-08-18 12:58:17,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:58:17,496 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2020-08-18 12:58:17,496 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 12:58:17,496 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2020-08-18 12:58:17,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-08-18 12:58:17,497 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:58:17,497 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:58:17,498 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 12:58:17,498 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:58:17,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:58:17,498 INFO L82 PathProgramCache]: Analyzing trace with hash 622671912, now seen corresponding path program 1 times [2020-08-18 12:58:17,499 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:58:17,499 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [859093821] [2020-08-18 12:58:17,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:58:17,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:58:17,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:58:17,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:58:17,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 12:58:17,626 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [859093821] [2020-08-18 12:58:17,627 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 12:58:17,627 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 12:58:17,627 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257206078] [2020-08-18 12:58:17,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 12:58:17,629 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:58:17,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 12:58:17,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 12:58:17,630 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 5 states. [2020-08-18 12:58:17,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:58:17,778 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2020-08-18 12:58:17,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 12:58:17,779 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-08-18 12:58:17,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:58:17,780 INFO L225 Difference]: With dead ends: 35 [2020-08-18 12:58:17,781 INFO L226 Difference]: Without dead ends: 33 [2020-08-18 12:58:17,782 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 12:58:17,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-18 12:58:17,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 25. [2020-08-18 12:58:17,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-08-18 12:58:17,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-08-18 12:58:17,788 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 11 [2020-08-18 12:58:17,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:58:17,789 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-08-18 12:58:17,789 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 12:58:17,789 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2020-08-18 12:58:17,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-18 12:58:17,790 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:58:17,790 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:58:17,790 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 12:58:17,791 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:58:17,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:58:17,791 INFO L82 PathProgramCache]: Analyzing trace with hash 59124385, now seen corresponding path program 1 times [2020-08-18 12:58:17,791 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:58:17,792 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [666402090] [2020-08-18 12:58:17,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:58:17,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:58:17,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:58:17,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:58:17,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 12:58:17,900 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [666402090] [2020-08-18 12:58:17,900 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 12:58:17,901 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 12:58:17,901 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409332432] [2020-08-18 12:58:17,901 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 12:58:17,902 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:58:17,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 12:58:17,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-18 12:58:17,902 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 6 states. [2020-08-18 12:58:18,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:58:18,106 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2020-08-18 12:58:18,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 12:58:18,107 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-08-18 12:58:18,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:58:18,108 INFO L225 Difference]: With dead ends: 51 [2020-08-18 12:58:18,108 INFO L226 Difference]: Without dead ends: 49 [2020-08-18 12:58:18,109 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-08-18 12:58:18,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-08-18 12:58:18,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 32. [2020-08-18 12:58:18,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-08-18 12:58:18,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2020-08-18 12:58:18,117 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 14 [2020-08-18 12:58:18,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:58:18,118 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2020-08-18 12:58:18,118 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 12:58:18,118 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2020-08-18 12:58:18,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-18 12:58:18,119 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:58:18,119 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:58:18,119 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 12:58:18,120 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:58:18,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:58:18,120 INFO L82 PathProgramCache]: Analyzing trace with hash 1951969173, now seen corresponding path program 1 times [2020-08-18 12:58:18,120 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:58:18,121 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1311531237] [2020-08-18 12:58:18,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:58:18,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:58:18,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:58:18,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:58:18,437 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 12:58:18,438 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1311531237] [2020-08-18 12:58:18,438 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 12:58:18,439 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-18 12:58:18,439 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267645927] [2020-08-18 12:58:18,439 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 12:58:18,445 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:58:18,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 12:58:18,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-08-18 12:58:18,446 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 8 states. [2020-08-18 12:58:18,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:58:18,950 INFO L93 Difference]: Finished difference Result 72 states and 83 transitions. [2020-08-18 12:58:18,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 12:58:18,951 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2020-08-18 12:58:18,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:58:18,954 INFO L225 Difference]: With dead ends: 72 [2020-08-18 12:58:18,954 INFO L226 Difference]: Without dead ends: 70 [2020-08-18 12:58:18,955 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-08-18 12:58:18,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-08-18 12:58:18,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 38. [2020-08-18 12:58:18,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-08-18 12:58:18,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2020-08-18 12:58:18,965 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 17 [2020-08-18 12:58:18,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:58:18,965 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2020-08-18 12:58:18,965 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 12:58:18,965 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2020-08-18 12:58:18,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-18 12:58:18,966 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:58:18,967 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:58:18,967 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 12:58:18,967 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:58:18,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:58:18,968 INFO L82 PathProgramCache]: Analyzing trace with hash -506610811, now seen corresponding path program 1 times [2020-08-18 12:58:18,968 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:58:18,968 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1860685156] [2020-08-18 12:58:18,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:58:18,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:58:19,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:58:19,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:58:19,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 12:58:19,085 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1860685156] [2020-08-18 12:58:19,086 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 12:58:19,086 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 12:58:19,086 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278424931] [2020-08-18 12:58:19,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 12:58:19,087 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:58:19,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 12:58:19,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-18 12:58:19,088 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand 6 states. [2020-08-18 12:58:19,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:58:19,244 INFO L93 Difference]: Finished difference Result 54 states and 64 transitions. [2020-08-18 12:58:19,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 12:58:19,246 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-08-18 12:58:19,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:58:19,247 INFO L225 Difference]: With dead ends: 54 [2020-08-18 12:58:19,247 INFO L226 Difference]: Without dead ends: 46 [2020-08-18 12:58:19,250 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-08-18 12:58:19,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-08-18 12:58:19,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2020-08-18 12:58:19,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-08-18 12:58:19,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2020-08-18 12:58:19,266 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 19 [2020-08-18 12:58:19,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:58:19,267 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2020-08-18 12:58:19,267 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 12:58:19,267 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2020-08-18 12:58:19,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-18 12:58:19,268 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:58:19,268 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:58:19,268 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 12:58:19,269 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:58:19,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:58:19,269 INFO L82 PathProgramCache]: Analyzing trace with hash -506551229, now seen corresponding path program 1 times [2020-08-18 12:58:19,270 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:58:19,270 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1225528853] [2020-08-18 12:58:19,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:58:19,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 12:58:19,309 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 12:58:19,310 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 12:58:19,317 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 12:58:19,355 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 12:58:19 BoogieIcfgContainer [2020-08-18 12:58:19,355 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 12:58:19,361 INFO L168 Benchmark]: Toolchain (without parser) took 3804.42 ms. Allocated memory was 142.1 MB in the beginning and 242.2 MB in the end (delta: 100.1 MB). Free memory was 102.3 MB in the beginning and 178.3 MB in the end (delta: -75.9 MB). Peak memory consumption was 24.2 MB. Max. memory is 7.1 GB. [2020-08-18 12:58:19,365 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 142.1 MB. Free memory was 122.3 MB in the beginning and 122.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-18 12:58:19,369 INFO L168 Benchmark]: CACSL2BoogieTranslator took 630.50 ms. Allocated memory was 142.1 MB in the beginning and 203.4 MB in the end (delta: 61.3 MB). Free memory was 102.1 MB in the beginning and 169.8 MB in the end (delta: -67.7 MB). Peak memory consumption was 23.8 MB. Max. memory is 7.1 GB. [2020-08-18 12:58:19,370 INFO L168 Benchmark]: Boogie Preprocessor took 70.15 ms. Allocated memory is still 203.4 MB. Free memory was 169.8 MB in the beginning and 166.7 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 7.1 GB. [2020-08-18 12:58:19,371 INFO L168 Benchmark]: RCFGBuilder took 639.23 ms. Allocated memory is still 203.4 MB. Free memory was 166.7 MB in the beginning and 120.1 MB in the end (delta: 46.6 MB). Peak memory consumption was 46.6 MB. Max. memory is 7.1 GB. [2020-08-18 12:58:19,375 INFO L168 Benchmark]: TraceAbstraction took 2459.63 ms. Allocated memory was 203.4 MB in the beginning and 242.2 MB in the end (delta: 38.8 MB). Free memory was 119.5 MB in the beginning and 178.3 MB in the end (delta: -58.8 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-18 12:58:19,382 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 142.1 MB. Free memory was 122.3 MB in the beginning and 122.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 630.50 ms. Allocated memory was 142.1 MB in the beginning and 203.4 MB in the end (delta: 61.3 MB). Free memory was 102.1 MB in the beginning and 169.8 MB in the end (delta: -67.7 MB). Peak memory consumption was 23.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 70.15 ms. Allocated memory is still 203.4 MB. Free memory was 169.8 MB in the beginning and 166.7 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 639.23 ms. Allocated memory is still 203.4 MB. Free memory was 166.7 MB in the beginning and 120.1 MB in the end (delta: 46.6 MB). Peak memory consumption was 46.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2459.63 ms. Allocated memory was 203.4 MB in the beginning and 242.2 MB in the end (delta: 38.8 MB). Free memory was 119.5 MB in the beginning and 178.3 MB in the end (delta: -58.8 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 1040]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L994] SLL* list = malloc(sizeof(SLL)); [L995] list->next = ((void*)0) [L996] list->prev = ((void*)0) [L997] list->colour = BLACK [L999] SLL* end = list; [L1002] COND FALSE !(__VERIFIER_nondet_int()) [L1025] end = ((void*)0) [L1026] end = list [L1029] COND FALSE !(!(((void*)0) != end)) [L1030] EXPR end->colour [L1030] COND FALSE !(!(BLACK == end->colour)) [L1032] COND TRUE ((void*)0) != end [L1034] EXPR end->colour [L1034] COND FALSE !(RED == end->colour) [L1040] EXPR end->next [L1040] COND TRUE !(end->next) [L1040] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 34 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.3s, OverallIterations: 6, TraceHistogramMax: 2, AutomataDifference: 1.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 124 SDtfs, 125 SDslu, 220 SDs, 0 SdLazy, 340 SolverSat, 41 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=40occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 63 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 90 NumberOfCodeBlocks, 90 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 66 ConstructedInterpolants, 0 QuantifiedInterpolants, 5078 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 4 PerfectInterpolantSequences, 0/2 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...