/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 --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/list-properties/splice-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 20:28:28,083 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 20:28:28,088 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 20:28:28,135 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 20:28:28,136 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 20:28:28,143 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 20:28:28,146 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 20:28:28,150 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 20:28:28,154 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 20:28:28,159 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 20:28:28,160 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 20:28:28,161 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 20:28:28,161 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 20:28:28,165 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 20:28:28,168 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 20:28:28,170 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 20:28:28,172 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 20:28:28,174 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 20:28:28,175 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 20:28:28,184 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 20:28:28,187 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 20:28:28,188 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 20:28:28,189 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 20:28:28,190 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 20:28:28,203 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 20:28:28,203 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 20:28:28,204 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 20:28:28,206 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 20:28:28,206 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 20:28:28,209 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 20:28:28,210 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 20:28:28,211 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 20:28:28,212 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 20:28:28,212 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 20:28:28,214 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 20:28:28,214 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 20:28:28,215 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 20:28:28,215 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 20:28:28,215 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 20:28:28,216 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 20:28:28,218 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 20:28:28,219 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 [2020-09-24 20:28:28,272 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 20:28:28,272 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 20:28:28,274 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 20:28:28,274 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 20:28:28,274 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 20:28:28,275 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 20:28:28,275 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 20:28:28,275 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 20:28:28,276 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 20:28:28,276 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 20:28:28,277 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 20:28:28,277 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 20:28:28,277 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 20:28:28,278 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 20:28:28,278 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 20:28:28,278 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 20:28:28,278 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 20:28:28,279 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 20:28:28,279 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 20:28:28,279 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 20:28:28,279 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 20:28:28,280 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 20:28:28,280 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 20:28:28,280 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 20:28:28,280 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 20:28:28,280 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 20:28:28,281 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 20:28:28,281 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 20:28:28,281 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 20:28:28,281 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.rcfgbuilder: Size of a code block -> SingleStatement 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 -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true; [2020-09-24 20:28:28,749 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 20:28:28,766 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 20:28:28,770 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 20:28:28,774 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 20:28:28,774 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 20:28:28,776 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/splice-1.i [2020-09-24 20:28:28,852 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f0dd36f5b/ba6fa573e23f489ca37c88c1925bd8c1/FLAG2e993a243 [2020-09-24 20:28:29,460 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 20:28:29,461 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-properties/splice-1.i [2020-09-24 20:28:29,476 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f0dd36f5b/ba6fa573e23f489ca37c88c1925bd8c1/FLAG2e993a243 [2020-09-24 20:28:29,720 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f0dd36f5b/ba6fa573e23f489ca37c88c1925bd8c1 [2020-09-24 20:28:29,735 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 20:28:29,741 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 20:28:29,743 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 20:28:29,743 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 20:28:29,747 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 20:28:29,749 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 08:28:29" (1/1) ... [2020-09-24 20:28:29,753 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@277364e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:28:29, skipping insertion in model container [2020-09-24 20:28:29,753 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 08:28:29" (1/1) ... [2020-09-24 20:28:29,763 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 20:28:29,825 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 20:28:30,355 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 20:28:30,373 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 20:28:30,422 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 20:28:30,479 INFO L208 MainTranslator]: Completed translation [2020-09-24 20:28:30,479 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:28:30 WrapperNode [2020-09-24 20:28:30,480 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 20:28:30,481 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 20:28:30,481 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 20:28:30,481 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 20:28:30,498 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:28:30" (1/1) ... [2020-09-24 20:28:30,499 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:28:30" (1/1) ... [2020-09-24 20:28:30,517 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:28:30" (1/1) ... [2020-09-24 20:28:30,518 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:28:30" (1/1) ... [2020-09-24 20:28:30,537 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:28:30" (1/1) ... [2020-09-24 20:28:30,544 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:28:30" (1/1) ... [2020-09-24 20:28:30,548 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:28:30" (1/1) ... [2020-09-24 20:28:30,555 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 20:28:30,556 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 20:28:30,556 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 20:28:30,556 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 20:28:30,557 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:28:30" (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 [2020-09-24 20:28:30,632 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 20:28:30,632 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 20:28:30,633 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-09-24 20:28:30,633 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-09-24 20:28:30,633 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-09-24 20:28:30,633 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-09-24 20:28:30,633 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-09-24 20:28:30,633 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-09-24 20:28:30,634 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 20:28:30,634 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 20:28:30,634 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 20:28:30,634 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-09-24 20:28:30,634 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-09-24 20:28:30,634 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-09-24 20:28:30,635 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-09-24 20:28:30,635 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-09-24 20:28:30,635 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-09-24 20:28:30,635 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-09-24 20:28:30,635 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-09-24 20:28:30,636 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-09-24 20:28:30,636 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-09-24 20:28:30,637 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-09-24 20:28:30,637 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-09-24 20:28:30,637 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-09-24 20:28:30,637 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-09-24 20:28:30,638 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-09-24 20:28:30,638 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-09-24 20:28:30,639 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-09-24 20:28:30,639 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-09-24 20:28:30,639 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-09-24 20:28:30,639 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-09-24 20:28:30,639 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-09-24 20:28:30,639 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-09-24 20:28:30,639 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-09-24 20:28:30,640 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-09-24 20:28:30,640 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-09-24 20:28:30,640 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-09-24 20:28:30,640 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-09-24 20:28:30,640 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-09-24 20:28:30,640 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-09-24 20:28:30,641 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-09-24 20:28:30,641 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-09-24 20:28:30,641 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-09-24 20:28:30,641 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-09-24 20:28:30,641 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-09-24 20:28:30,641 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-09-24 20:28:30,642 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-09-24 20:28:30,642 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-09-24 20:28:30,642 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-09-24 20:28:30,642 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-09-24 20:28:30,642 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-09-24 20:28:30,643 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-09-24 20:28:30,643 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-09-24 20:28:30,643 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-09-24 20:28:30,644 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-09-24 20:28:30,644 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-09-24 20:28:30,644 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-09-24 20:28:30,644 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-09-24 20:28:30,644 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-09-24 20:28:30,645 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-09-24 20:28:30,645 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-09-24 20:28:30,645 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-09-24 20:28:30,645 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-09-24 20:28:30,645 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-09-24 20:28:30,645 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-09-24 20:28:30,646 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-09-24 20:28:30,646 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-24 20:28:30,647 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-09-24 20:28:30,647 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-09-24 20:28:30,647 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-09-24 20:28:30,648 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-09-24 20:28:30,649 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-09-24 20:28:30,650 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-09-24 20:28:30,650 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-09-24 20:28:30,650 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-24 20:28:30,650 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-09-24 20:28:30,651 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-09-24 20:28:30,651 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-09-24 20:28:30,651 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-24 20:28:30,651 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-09-24 20:28:30,651 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-09-24 20:28:30,651 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-09-24 20:28:30,651 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-09-24 20:28:30,651 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-09-24 20:28:30,652 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-09-24 20:28:30,652 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-09-24 20:28:30,652 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-09-24 20:28:30,652 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-09-24 20:28:30,652 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-09-24 20:28:30,652 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-09-24 20:28:30,653 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-09-24 20:28:30,653 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-09-24 20:28:30,653 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-09-24 20:28:30,653 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-09-24 20:28:30,653 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-09-24 20:28:30,653 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-09-24 20:28:30,654 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-09-24 20:28:30,654 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-09-24 20:28:30,654 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-09-24 20:28:30,654 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-09-24 20:28:30,654 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-09-24 20:28:30,654 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-09-24 20:28:30,655 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-09-24 20:28:30,655 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-09-24 20:28:30,655 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-09-24 20:28:30,655 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-09-24 20:28:30,655 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-09-24 20:28:30,655 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-09-24 20:28:30,655 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-09-24 20:28:30,656 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-09-24 20:28:30,656 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-09-24 20:28:30,656 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-09-24 20:28:30,656 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-09-24 20:28:30,656 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-09-24 20:28:30,656 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-09-24 20:28:30,657 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-09-24 20:28:30,657 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-09-24 20:28:30,657 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-09-24 20:28:30,657 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-09-24 20:28:30,657 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 20:28:30,657 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-24 20:28:30,658 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-24 20:28:30,658 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-24 20:28:30,658 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-24 20:28:30,658 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-24 20:28:30,658 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 20:28:30,658 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 20:28:30,659 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-24 20:28:31,070 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-09-24 20:28:31,365 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 20:28:31,366 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-09-24 20:28:31,376 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 08:28:31 BoogieIcfgContainer [2020-09-24 20:28:31,376 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 20:28:31,378 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 20:28:31,378 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 20:28:31,382 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 20:28:31,382 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 08:28:29" (1/3) ... [2020-09-24 20:28:31,383 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55285c00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 08:28:31, skipping insertion in model container [2020-09-24 20:28:31,384 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:28:30" (2/3) ... [2020-09-24 20:28:31,385 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55285c00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 08:28:31, skipping insertion in model container [2020-09-24 20:28:31,385 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 08:28:31" (3/3) ... [2020-09-24 20:28:31,387 INFO L109 eAbstractionObserver]: Analyzing ICFG splice-1.i [2020-09-24 20:28:31,402 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 20:28:31,421 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 20:28:31,442 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 20:28:31,471 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 20:28:31,471 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 20:28:31,471 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 20:28:31,472 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 20:28:31,472 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 20:28:31,472 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 20:28:31,472 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 20:28:31,472 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 20:28:31,498 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states. [2020-09-24 20:28:31,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-24 20:28:31,509 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:28:31,510 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:28:31,510 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:28:31,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:28:31,518 INFO L82 PathProgramCache]: Analyzing trace with hash 570656219, now seen corresponding path program 1 times [2020-09-24 20:28:31,528 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:28:31,528 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1893489669] [2020-09-24 20:28:31,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:28:31,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:28:31,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:28:31,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:28:31,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:28:32,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:28:32,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:28:32,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-24 20:28:32,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 20:28:32,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 878 [2020-09-24 20:28:32,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:28:32,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 20:28:32,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-24 20:28:32,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-24 20:28:32,571 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 20:28:32,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:28:32,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:28:32,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:28:32,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:28:32,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 20:28:32,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:28:32,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-24 20:28:32,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:28:32,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:28:32,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:28:32,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:28:32,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:28:32,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 20:28:32,699 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1893489669] [2020-09-24 20:28:32,701 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 20:28:32,701 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-24 20:28:32,702 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109496436] [2020-09-24 20:28:32,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 20:28:32,709 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:28:32,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 20:28:32,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-24 20:28:32,731 INFO L87 Difference]: Start difference. First operand 88 states. Second operand 6 states. [2020-09-24 20:28:33,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:28:33,174 INFO L93 Difference]: Finished difference Result 169 states and 199 transitions. [2020-09-24 20:28:33,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-24 20:28:33,177 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2020-09-24 20:28:33,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:28:33,197 INFO L225 Difference]: With dead ends: 169 [2020-09-24 20:28:33,198 INFO L226 Difference]: Without dead ends: 98 [2020-09-24 20:28:33,204 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 [2020-09-24 20:28:33,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-09-24 20:28:33,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 78. [2020-09-24 20:28:33,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-24 20:28:33,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 84 transitions. [2020-09-24 20:28:33,294 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 84 transitions. Word has length 33 [2020-09-24 20:28:33,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:28:33,295 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 84 transitions. [2020-09-24 20:28:33,295 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 20:28:33,295 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 84 transitions. [2020-09-24 20:28:33,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-09-24 20:28:33,299 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:28:33,299 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:28:33,300 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 20:28:33,300 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:28:33,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:28:33,300 INFO L82 PathProgramCache]: Analyzing trace with hash 294194033, now seen corresponding path program 1 times [2020-09-24 20:28:33,301 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:28:33,301 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1708688926] [2020-09-24 20:28:33,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:28:33,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:28:33,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:28:33,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:28:33,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:28:36,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:28:36,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-09-24 20:28:36,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 20:28:36,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3082 [2020-09-24 20:28:36,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:28:36,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-09-24 20:28:36,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-24 20:28:36,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-09-24 20:28:36,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:28:36,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:28:36,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:28:36,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:28:36,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:28:36,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 20:28:36,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:28:36,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-24 20:28:36,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:28:36,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:28:36,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:28:36,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:28:36,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:28:36,751 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 20:28:36,751 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1708688926] [2020-09-24 20:28:36,752 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 20:28:36,752 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-24 20:28:36,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451397635] [2020-09-24 20:28:36,760 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-24 20:28:36,761 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:28:36,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-24 20:28:36,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-09-24 20:28:36,763 INFO L87 Difference]: Start difference. First operand 78 states and 84 transitions. Second operand 15 states. [2020-09-24 20:28:37,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:28:37,670 INFO L93 Difference]: Finished difference Result 185 states and 201 transitions. [2020-09-24 20:28:37,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-24 20:28:37,671 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 50 [2020-09-24 20:28:37,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:28:37,673 INFO L225 Difference]: With dead ends: 185 [2020-09-24 20:28:37,673 INFO L226 Difference]: Without dead ends: 164 [2020-09-24 20:28:37,676 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=201, Invalid=611, Unknown=0, NotChecked=0, Total=812 [2020-09-24 20:28:37,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-09-24 20:28:37,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 102. [2020-09-24 20:28:37,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-09-24 20:28:37,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 110 transitions. [2020-09-24 20:28:37,696 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 110 transitions. Word has length 50 [2020-09-24 20:28:37,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:28:37,696 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 110 transitions. [2020-09-24 20:28:37,697 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-24 20:28:37,697 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 110 transitions. [2020-09-24 20:28:37,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-09-24 20:28:37,698 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:28:37,699 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:28:37,699 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 20:28:37,699 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:28:37,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:28:37,700 INFO L82 PathProgramCache]: Analyzing trace with hash 2092919149, now seen corresponding path program 1 times [2020-09-24 20:28:37,700 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:28:37,700 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [889089] [2020-09-24 20:28:37,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:28:37,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:28:37,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:28:37,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:28:37,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:28:37,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:28:42,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:28:42,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-09-24 20:28:42,285 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 20:28:42,285 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4569 [2020-09-24 20:28:42,285 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:28:42,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-09-24 20:28:42,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-24 20:28:42,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-09-24 20:28:42,286 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:28:42,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:28:42,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:28:42,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:28:42,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:28:42,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 20:28:42,519 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:28:42,519 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 20:28:42,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:28:42,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:28:42,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:28:42,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:28:42,520 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:28:42,533 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 20:28:42,534 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [889089] [2020-09-24 20:28:42,534 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 20:28:42,534 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-24 20:28:42,535 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399853012] [2020-09-24 20:28:42,536 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-24 20:28:42,536 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:28:42,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-24 20:28:42,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-09-24 20:28:42,537 INFO L87 Difference]: Start difference. First operand 102 states and 110 transitions. Second operand 15 states. [2020-09-24 20:28:43,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:28:43,502 INFO L93 Difference]: Finished difference Result 199 states and 216 transitions. [2020-09-24 20:28:43,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-24 20:28:43,502 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 50 [2020-09-24 20:28:43,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:28:43,505 INFO L225 Difference]: With dead ends: 199 [2020-09-24 20:28:43,505 INFO L226 Difference]: Without dead ends: 178 [2020-09-24 20:28:43,506 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=201, Invalid=611, Unknown=0, NotChecked=0, Total=812 [2020-09-24 20:28:43,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-09-24 20:28:43,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 104. [2020-09-24 20:28:43,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-09-24 20:28:43,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 112 transitions. [2020-09-24 20:28:43,518 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 112 transitions. Word has length 50 [2020-09-24 20:28:43,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:28:43,518 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 112 transitions. [2020-09-24 20:28:43,518 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-24 20:28:43,519 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 112 transitions. [2020-09-24 20:28:43,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-09-24 20:28:43,521 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:28:43,521 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:28:43,521 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 20:28:43,521 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:28:43,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:28:43,522 INFO L82 PathProgramCache]: Analyzing trace with hash -1840938300, now seen corresponding path program 1 times [2020-09-24 20:28:43,522 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:28:43,522 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [369924385] [2020-09-24 20:28:43,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:28:43,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-24 20:28:43,551 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-24 20:28:43,552 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-24 20:28:43,557 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 20:28:43,582 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 08:28:43 BoogieIcfgContainer [2020-09-24 20:28:43,582 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-24 20:28:43,586 INFO L168 Benchmark]: Toolchain (without parser) took 13848.05 ms. Allocated memory was 139.5 MB in the beginning and 318.2 MB in the end (delta: 178.8 MB). Free memory was 101.3 MB in the beginning and 165.0 MB in the end (delta: -63.6 MB). Peak memory consumption was 115.1 MB. Max. memory is 7.1 GB. [2020-09-24 20:28:43,587 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 139.5 MB. Free memory was 120.9 MB in the beginning and 120.7 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2020-09-24 20:28:43,588 INFO L168 Benchmark]: CACSL2BoogieTranslator took 737.60 ms. Allocated memory was 139.5 MB in the beginning and 202.4 MB in the end (delta: 62.9 MB). Free memory was 100.7 MB in the beginning and 168.0 MB in the end (delta: -67.3 MB). Peak memory consumption was 24.0 MB. Max. memory is 7.1 GB. [2020-09-24 20:28:43,589 INFO L168 Benchmark]: Boogie Preprocessor took 74.80 ms. Allocated memory is still 202.4 MB. Free memory was 168.0 MB in the beginning and 165.3 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. [2020-09-24 20:28:43,590 INFO L168 Benchmark]: RCFGBuilder took 820.68 ms. Allocated memory is still 202.4 MB. Free memory was 165.3 MB in the beginning and 114.5 MB in the end (delta: 50.8 MB). Peak memory consumption was 50.8 MB. Max. memory is 7.1 GB. [2020-09-24 20:28:43,591 INFO L168 Benchmark]: TraceAbstraction took 12204.82 ms. Allocated memory was 202.4 MB in the beginning and 318.2 MB in the end (delta: 115.9 MB). Free memory was 113.8 MB in the beginning and 165.0 MB in the end (delta: -51.1 MB). Peak memory consumption was 64.8 MB. Max. memory is 7.1 GB. [2020-09-24 20:28:43,595 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 139.5 MB. Free memory was 120.9 MB in the beginning and 120.7 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 737.60 ms. Allocated memory was 139.5 MB in the beginning and 202.4 MB in the end (delta: 62.9 MB). Free memory was 100.7 MB in the beginning and 168.0 MB in the end (delta: -67.3 MB). Peak memory consumption was 24.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 74.80 ms. Allocated memory is still 202.4 MB. Free memory was 168.0 MB in the beginning and 165.3 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 820.68 ms. Allocated memory is still 202.4 MB. Free memory was 165.3 MB in the beginning and 114.5 MB in the end (delta: 50.8 MB). Peak memory consumption was 50.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 12204.82 ms. Allocated memory was 202.4 MB in the beginning and 318.2 MB in the end (delta: 115.9 MB). Free memory was 113.8 MB in the beginning and 165.0 MB in the end (delta: -51.1 MB). Peak memory consumption was 64.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 573]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L521] int flag = 1; [L522] List a = (List) malloc(sizeof(struct node)); [L523] COND FALSE !(a == 0) [L524] List t; [L525] List l1; [L526] List l2; [L527] List b; [L528] List u; [L529] List p = a; [L530] COND TRUE __VERIFIER_nondet_int() [L531] COND TRUE \read(flag) [L532] p->h = 1 [L533] flag = 0 [L538] t = (List) malloc(sizeof(struct node)) [L539] COND FALSE !(t == 0) [L540] p->n = t [L541] EXPR p->n [L541] p = p->n [L530] COND FALSE !(__VERIFIER_nondet_int()) [L543] p->h = 3 [L544] EXPR a->h [L544] COND FALSE !(a->h == 3) [L545] flag = 1 [L546] l1 = 0 [L547] l2 = 0 [L548] p = a [L549] EXPR p->h [L549] COND TRUE p->h != 3 [L550] t = p [L551] EXPR p->n [L551] p = p->n [L552] COND TRUE \read(flag) [L553] t->n = l1 [L554] l1 = t [L555] flag = 0 [L549] EXPR p->h [L549] COND FALSE !(p->h != 3) [L562] p = l1 [L563] COND TRUE p != 0 [L564] EXPR p->h [L564] COND TRUE p->h != 2 [L573] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 9 procedures, 111 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 12.0s, OverallIterations: 4, TraceHistogramMax: 2, AutomataDifference: 2.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 253 SDtfs, 639 SDslu, 1463 SDs, 0 SdLazy, 1230 SolverSat, 94 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 69 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 1.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=104occurred in iteration=3, 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, 3 MinimizatonAttempts, 156 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 9.2s InterpolantComputationTime, 194 NumberOfCodeBlocks, 194 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 130 ConstructedInterpolants, 0 QuantifiedInterpolants, 38310 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 1 PerfectInterpolantSequences, 0/4 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...